2008-02-05 06:28:26 +00:00
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/*
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2014-02-07 22:35:48 +00:00
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* PCA953x 4/8/16/24/40 bit I/O ports
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2008-02-05 06:28:26 +00:00
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*
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* Copyright (C) 2005 Ben Gardner <bgardner@wabtec.com>
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* Copyright (C) 2007 Marvell International Ltd.
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*
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* Derived from drivers/i2c/chips/pca9539.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*/
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2017-03-22 14:11:12 +00:00
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#include <linux/acpi.h>
|
2009-09-22 23:46:37 +00:00
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#include <linux/gpio.h>
|
2017-01-10 19:29:51 +00:00
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#include <linux/gpio/consumer.h>
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2008-02-05 06:28:26 +00:00
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#include <linux/i2c.h>
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2017-03-22 14:11:12 +00:00
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/of_platform.h>
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2013-08-29 19:24:14 +00:00
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#include <linux/platform_data/pca953x.h>
|
2017-03-22 14:11:12 +00:00
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#include <linux/regulator/consumer.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
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#include <linux/slab.h>
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2017-03-22 14:11:12 +00:00
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2016-03-30 06:49:14 +00:00
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#include <asm/unaligned.h>
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2008-02-05 06:28:26 +00:00
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2011-04-18 14:12:46 +00:00
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#define PCA953X_INPUT 0
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#define PCA953X_OUTPUT 1
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#define PCA953X_INVERT 2
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#define PCA953X_DIRECTION 3
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2012-05-09 07:46:17 +00:00
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#define REG_ADDR_AI 0x80
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2011-04-18 14:12:46 +00:00
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#define PCA957X_IN 0
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#define PCA957X_INVRT 1
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#define PCA957X_BKEN 2
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#define PCA957X_PUPD 3
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#define PCA957X_CFG 4
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#define PCA957X_OUT 5
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#define PCA957X_MSK 6
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#define PCA957X_INTS 7
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2016-04-07 04:56:32 +00:00
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#define PCAL953X_IN_LATCH 34
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#define PCAL953X_INT_MASK 37
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#define PCAL953X_INT_STAT 38
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2011-04-18 14:12:46 +00:00
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#define PCA_GPIO_MASK 0x00FF
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#define PCA_INT 0x0100
|
2016-05-31 14:05:57 +00:00
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#define PCA_PCAL 0x0200
|
2011-04-18 14:12:46 +00:00
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#define PCA953X_TYPE 0x1000
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#define PCA957X_TYPE 0x2000
|
2015-10-01 11:20:27 +00:00
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#define PCA_TYPE_MASK 0xF000
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#define PCA_CHIP_TYPE(x) ((x) & PCA_TYPE_MASK)
|
2010-03-05 21:44:36 +00:00
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2008-04-29 21:11:40 +00:00
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static const struct i2c_device_id pca953x_id[] = {
|
2013-01-22 21:10:24 +00:00
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{ "pca9505", 40 | PCA953X_TYPE | PCA_INT, },
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2011-04-18 14:12:46 +00:00
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{ "pca9534", 8 | PCA953X_TYPE | PCA_INT, },
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{ "pca9535", 16 | PCA953X_TYPE | PCA_INT, },
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{ "pca9536", 4 | PCA953X_TYPE, },
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{ "pca9537", 4 | PCA953X_TYPE | PCA_INT, },
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{ "pca9538", 8 | PCA953X_TYPE | PCA_INT, },
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{ "pca9539", 16 | PCA953X_TYPE | PCA_INT, },
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{ "pca9554", 8 | PCA953X_TYPE | PCA_INT, },
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{ "pca9555", 16 | PCA953X_TYPE | PCA_INT, },
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{ "pca9556", 8 | PCA953X_TYPE, },
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{ "pca9557", 8 | PCA953X_TYPE, },
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{ "pca9574", 8 | PCA957X_TYPE | PCA_INT, },
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{ "pca9575", 16 | PCA957X_TYPE | PCA_INT, },
|
2014-02-13 12:59:23 +00:00
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{ "pca9698", 40 | PCA953X_TYPE, },
|
2011-04-18 14:12:46 +00:00
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2016-06-14 22:57:56 +00:00
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{ "pcal9555a", 16 | PCA953X_TYPE | PCA_INT | PCA_PCAL, },
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2011-04-18 14:12:46 +00:00
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{ "max7310", 8 | PCA953X_TYPE, },
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{ "max7312", 16 | PCA953X_TYPE | PCA_INT, },
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{ "max7313", 16 | PCA953X_TYPE | PCA_INT, },
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{ "max7315", 8 | PCA953X_TYPE | PCA_INT, },
|
2016-10-17 16:36:49 +00:00
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{ "max7318", 16 | PCA953X_TYPE | PCA_INT, },
|
2011-04-18 14:12:46 +00:00
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{ "pca6107", 8 | PCA953X_TYPE | PCA_INT, },
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{ "tca6408", 8 | PCA953X_TYPE | PCA_INT, },
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{ "tca6416", 16 | PCA953X_TYPE | PCA_INT, },
|
2012-05-09 07:46:17 +00:00
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{ "tca6424", 24 | PCA953X_TYPE | PCA_INT, },
|
2015-09-29 10:55:44 +00:00
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{ "tca9539", 16 | PCA953X_TYPE | PCA_INT, },
|
2017-04-21 12:46:30 +00:00
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{ "tca9554", 8 | PCA953X_TYPE | PCA_INT, },
|
2014-02-07 22:36:21 +00:00
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{ "xra1202", 8 | PCA953X_TYPE },
|
2008-04-29 21:11:40 +00:00
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{ }
|
2008-02-06 09:39:04 +00:00
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};
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2008-04-29 21:11:40 +00:00
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MODULE_DEVICE_TABLE(i2c, pca953x_id);
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2008-02-05 06:28:26 +00:00
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|
2015-10-01 11:20:28 +00:00
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static const struct acpi_device_id pca953x_acpi_ids[] = {
|
2016-04-07 04:56:32 +00:00
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{ "INT3491", 16 | PCA953X_TYPE | PCA_INT | PCA_PCAL, },
|
2015-10-01 11:20:28 +00:00
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{ }
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};
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MODULE_DEVICE_TABLE(acpi, pca953x_acpi_ids);
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|
2013-01-22 21:10:23 +00:00
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#define MAX_BANK 5
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#define BANK_SZ 8
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|
2016-06-09 05:32:04 +00:00
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#define NBANK(chip) DIV_ROUND_UP(chip->gpio_chip.ngpio, BANK_SZ)
|
2013-01-22 21:10:23 +00:00
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|
2016-09-09 09:17:34 +00:00
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struct pca953x_reg_config {
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int direction;
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int output;
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int input;
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};
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static const struct pca953x_reg_config pca953x_regs = {
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.direction = PCA953X_DIRECTION,
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.output = PCA953X_OUTPUT,
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.input = PCA953X_INPUT,
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};
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static const struct pca953x_reg_config pca957x_regs = {
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.direction = PCA957X_CFG,
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.output = PCA957X_OUT,
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.input = PCA957X_IN,
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};
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|
2008-02-06 09:39:03 +00:00
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struct pca953x_chip {
|
2008-02-05 06:28:26 +00:00
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unsigned gpio_start;
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2013-01-22 21:10:23 +00:00
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u8 reg_output[MAX_BANK];
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u8 reg_direction[MAX_BANK];
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2011-02-10 23:01:23 +00:00
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struct mutex i2c_lock;
|
2008-02-05 06:28:26 +00:00
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2010-03-05 21:44:36 +00:00
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#ifdef CONFIG_GPIO_PCA953X_IRQ
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struct mutex irq_lock;
|
2013-01-22 21:10:23 +00:00
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u8 irq_mask[MAX_BANK];
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u8 irq_stat[MAX_BANK];
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u8 irq_trig_raise[MAX_BANK];
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u8 irq_trig_fall[MAX_BANK];
|
2010-03-05 21:44:36 +00:00
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#endif
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2008-02-05 06:28:26 +00:00
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struct i2c_client *client;
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struct gpio_chip gpio_chip;
|
2010-05-26 21:42:17 +00:00
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const char *const *names;
|
2015-10-01 11:20:27 +00:00
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unsigned long driver_data;
|
2016-07-29 03:39:55 +00:00
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struct regulator *regulator;
|
2016-09-09 09:17:34 +00:00
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const struct pca953x_reg_config *regs;
|
2016-09-09 09:17:35 +00:00
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int (*write_regs)(struct pca953x_chip *, int, u8 *);
|
2016-09-09 09:17:36 +00:00
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int (*read_regs)(struct pca953x_chip *, int, u8 *);
|
2008-02-05 06:28:26 +00:00
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};
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|
2013-01-22 21:10:23 +00:00
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static int pca953x_read_single(struct pca953x_chip *chip, int reg, u32 *val,
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int off)
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{
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int ret;
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int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
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int offset = off / BANK_SZ;
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ret = i2c_smbus_read_byte_data(chip->client,
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(reg << bank_shift) + offset);
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*val = ret;
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if (ret < 0) {
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dev_err(&chip->client->dev, "failed reading register\n");
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return ret;
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}
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return 0;
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}
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static int pca953x_write_single(struct pca953x_chip *chip, int reg, u32 val,
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int off)
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{
|
2016-05-31 14:05:57 +00:00
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int ret;
|
2013-01-22 21:10:23 +00:00
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int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
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int offset = off / BANK_SZ;
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ret = i2c_smbus_write_byte_data(chip->client,
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(reg << bank_shift) + offset, val);
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if (ret < 0) {
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dev_err(&chip->client->dev, "failed writing register\n");
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return ret;
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}
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return 0;
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}
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|
2016-09-09 09:17:35 +00:00
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static int pca953x_write_regs_8(struct pca953x_chip *chip, int reg, u8 *val)
|
2008-02-05 06:28:26 +00:00
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{
|
2016-09-09 09:17:35 +00:00
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return i2c_smbus_write_byte_data(chip->client, reg, *val);
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}
|
2008-02-06 09:39:04 +00:00
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|
2016-09-09 09:17:35 +00:00
|
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static int pca953x_write_regs_16(struct pca953x_chip *chip, int reg, u8 *val)
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{
|
2017-07-03 17:45:30 +00:00
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u16 word = get_unaligned((u16 *)val);
|
2016-05-31 19:03:43 +00:00
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|
2017-07-03 17:45:30 +00:00
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return i2c_smbus_write_word_data(chip->client, reg << 1, word);
|
2016-09-09 09:17:35 +00:00
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}
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static int pca957x_write_regs_16(struct pca953x_chip *chip, int reg, u8 *val)
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{
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int ret;
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ret = i2c_smbus_write_byte_data(chip->client, reg << 1, val[0]);
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if (ret < 0)
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return ret;
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return i2c_smbus_write_byte_data(chip->client, (reg << 1) + 1, val[1]);
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}
|
2008-02-06 09:39:04 +00:00
|
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|
2016-09-09 09:17:35 +00:00
|
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static int pca953x_write_regs_24(struct pca953x_chip *chip, int reg, u8 *val)
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{
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int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
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return i2c_smbus_write_i2c_block_data(chip->client,
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(reg << bank_shift) | REG_ADDR_AI,
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NBANK(chip), val);
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}
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static int pca953x_write_regs(struct pca953x_chip *chip, int reg, u8 *val)
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{
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int ret = 0;
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ret = chip->write_regs(chip, reg, val);
|
2008-02-06 09:39:04 +00:00
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|
if (ret < 0) {
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|
|
dev_err(&chip->client->dev, "failed writing register\n");
|
2009-01-06 22:42:27 +00:00
|
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|
return ret;
|
2008-02-06 09:39:04 +00:00
|
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|
}
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|
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return 0;
|
2008-02-05 06:28:26 +00:00
|
|
|
}
|
|
|
|
|
2016-09-09 09:17:36 +00:00
|
|
|
static int pca953x_read_regs_8(struct pca953x_chip *chip, int reg, u8 *val)
|
2008-02-05 06:28:26 +00:00
|
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|
{
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|
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|
int ret;
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|
|
|
|
2016-09-09 09:17:36 +00:00
|
|
|
ret = i2c_smbus_read_byte_data(chip->client, reg);
|
|
|
|
*val = ret;
|
2013-01-22 21:10:23 +00:00
|
|
|
|
2016-09-09 09:17:36 +00:00
|
|
|
return ret;
|
|
|
|
}
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|
|
|
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|
|
static int pca953x_read_regs_16(struct pca953x_chip *chip, int reg, u8 *val)
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|
|
|
{
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|
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|
int ret;
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|
ret = i2c_smbus_read_word_data(chip->client, reg << 1);
|
2017-07-03 17:45:30 +00:00
|
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|
put_unaligned(ret, (u16 *)val);
|
2016-09-09 09:17:36 +00:00
|
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|
return ret;
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|
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|
}
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|
|
static int pca953x_read_regs_24(struct pca953x_chip *chip, int reg, u8 *val)
|
|
|
|
{
|
|
|
|
int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
|
|
|
|
|
|
|
|
return i2c_smbus_read_i2c_block_data(chip->client,
|
|
|
|
(reg << bank_shift) | REG_ADDR_AI,
|
|
|
|
NBANK(chip), val);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int pca953x_read_regs(struct pca953x_chip *chip, int reg, u8 *val)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = chip->read_regs(chip, reg, val);
|
2008-02-05 06:28:26 +00:00
|
|
|
if (ret < 0) {
|
|
|
|
dev_err(&chip->client->dev, "failed reading register\n");
|
2009-01-06 22:42:27 +00:00
|
|
|
return ret;
|
2008-02-05 06:28:26 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-02-06 09:39:03 +00:00
|
|
|
static int pca953x_gpio_direction_input(struct gpio_chip *gc, unsigned off)
|
2008-02-05 06:28:26 +00:00
|
|
|
{
|
2015-12-07 10:20:54 +00:00
|
|
|
struct pca953x_chip *chip = gpiochip_get_data(gc);
|
2013-01-22 21:10:23 +00:00
|
|
|
u8 reg_val;
|
2016-09-09 09:17:34 +00:00
|
|
|
int ret;
|
2008-02-05 06:28:26 +00:00
|
|
|
|
2011-02-10 23:01:23 +00:00
|
|
|
mutex_lock(&chip->i2c_lock);
|
2013-01-22 21:10:23 +00:00
|
|
|
reg_val = chip->reg_direction[off / BANK_SZ] | (1u << (off % BANK_SZ));
|
2011-04-18 14:12:46 +00:00
|
|
|
|
2016-09-09 09:17:34 +00:00
|
|
|
ret = pca953x_write_single(chip, chip->regs->direction, reg_val, off);
|
2008-02-05 06:28:26 +00:00
|
|
|
if (ret)
|
2011-02-10 23:01:23 +00:00
|
|
|
goto exit;
|
2008-02-05 06:28:26 +00:00
|
|
|
|
2013-01-22 21:10:23 +00:00
|
|
|
chip->reg_direction[off / BANK_SZ] = reg_val;
|
2011-02-10 23:01:23 +00:00
|
|
|
exit:
|
|
|
|
mutex_unlock(&chip->i2c_lock);
|
|
|
|
return ret;
|
2008-02-05 06:28:26 +00:00
|
|
|
}
|
|
|
|
|
2008-02-06 09:39:03 +00:00
|
|
|
static int pca953x_gpio_direction_output(struct gpio_chip *gc,
|
2008-02-05 06:28:26 +00:00
|
|
|
unsigned off, int val)
|
|
|
|
{
|
2015-12-07 10:20:54 +00:00
|
|
|
struct pca953x_chip *chip = gpiochip_get_data(gc);
|
2013-01-22 21:10:23 +00:00
|
|
|
u8 reg_val;
|
2016-09-09 09:17:34 +00:00
|
|
|
int ret;
|
2008-02-05 06:28:26 +00:00
|
|
|
|
2011-02-10 23:01:23 +00:00
|
|
|
mutex_lock(&chip->i2c_lock);
|
2008-02-05 06:28:26 +00:00
|
|
|
/* set output level */
|
|
|
|
if (val)
|
2013-01-22 21:10:23 +00:00
|
|
|
reg_val = chip->reg_output[off / BANK_SZ]
|
|
|
|
| (1u << (off % BANK_SZ));
|
2008-02-05 06:28:26 +00:00
|
|
|
else
|
2013-01-22 21:10:23 +00:00
|
|
|
reg_val = chip->reg_output[off / BANK_SZ]
|
|
|
|
& ~(1u << (off % BANK_SZ));
|
2008-02-05 06:28:26 +00:00
|
|
|
|
2016-09-09 09:17:34 +00:00
|
|
|
ret = pca953x_write_single(chip, chip->regs->output, reg_val, off);
|
2008-02-05 06:28:26 +00:00
|
|
|
if (ret)
|
2011-02-10 23:01:23 +00:00
|
|
|
goto exit;
|
2008-02-05 06:28:26 +00:00
|
|
|
|
2013-01-22 21:10:23 +00:00
|
|
|
chip->reg_output[off / BANK_SZ] = reg_val;
|
2008-02-05 06:28:26 +00:00
|
|
|
|
|
|
|
/* then direction */
|
2013-01-22 21:10:23 +00:00
|
|
|
reg_val = chip->reg_direction[off / BANK_SZ] & ~(1u << (off % BANK_SZ));
|
2016-09-09 09:17:34 +00:00
|
|
|
ret = pca953x_write_single(chip, chip->regs->direction, reg_val, off);
|
2008-02-05 06:28:26 +00:00
|
|
|
if (ret)
|
2011-02-10 23:01:23 +00:00
|
|
|
goto exit;
|
2008-02-05 06:28:26 +00:00
|
|
|
|
2013-01-22 21:10:23 +00:00
|
|
|
chip->reg_direction[off / BANK_SZ] = reg_val;
|
2011-02-10 23:01:23 +00:00
|
|
|
exit:
|
|
|
|
mutex_unlock(&chip->i2c_lock);
|
|
|
|
return ret;
|
2008-02-05 06:28:26 +00:00
|
|
|
}
|
|
|
|
|
2008-02-06 09:39:03 +00:00
|
|
|
static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off)
|
2008-02-05 06:28:26 +00:00
|
|
|
{
|
2015-12-07 10:20:54 +00:00
|
|
|
struct pca953x_chip *chip = gpiochip_get_data(gc);
|
2012-05-09 07:46:17 +00:00
|
|
|
u32 reg_val;
|
2016-09-09 09:17:34 +00:00
|
|
|
int ret;
|
2008-02-05 06:28:26 +00:00
|
|
|
|
2011-02-10 23:01:23 +00:00
|
|
|
mutex_lock(&chip->i2c_lock);
|
2016-09-09 09:17:34 +00:00
|
|
|
ret = pca953x_read_single(chip, chip->regs->input, ®_val, off);
|
2011-02-10 23:01:23 +00:00
|
|
|
mutex_unlock(&chip->i2c_lock);
|
2008-02-05 06:28:26 +00:00
|
|
|
if (ret < 0) {
|
|
|
|
/* NOTE: diagnostic already emitted; that's all we should
|
|
|
|
* do unless gpio_*_value_cansleep() calls become different
|
|
|
|
* from their nonsleeping siblings (and report faults).
|
|
|
|
*/
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-08-07 21:52:40 +00:00
|
|
|
return (reg_val & (1u << (off % BANK_SZ))) ? 1 : 0;
|
2008-02-05 06:28:26 +00:00
|
|
|
}
|
|
|
|
|
2008-02-06 09:39:03 +00:00
|
|
|
static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val)
|
2008-02-05 06:28:26 +00:00
|
|
|
{
|
2015-12-07 10:20:54 +00:00
|
|
|
struct pca953x_chip *chip = gpiochip_get_data(gc);
|
2013-01-22 21:10:23 +00:00
|
|
|
u8 reg_val;
|
2016-09-09 09:17:34 +00:00
|
|
|
int ret;
|
2008-02-05 06:28:26 +00:00
|
|
|
|
2011-02-10 23:01:23 +00:00
|
|
|
mutex_lock(&chip->i2c_lock);
|
2008-02-05 06:28:26 +00:00
|
|
|
if (val)
|
2013-01-22 21:10:23 +00:00
|
|
|
reg_val = chip->reg_output[off / BANK_SZ]
|
|
|
|
| (1u << (off % BANK_SZ));
|
2008-02-05 06:28:26 +00:00
|
|
|
else
|
2013-01-22 21:10:23 +00:00
|
|
|
reg_val = chip->reg_output[off / BANK_SZ]
|
|
|
|
& ~(1u << (off % BANK_SZ));
|
2008-02-05 06:28:26 +00:00
|
|
|
|
2016-09-09 09:17:34 +00:00
|
|
|
ret = pca953x_write_single(chip, chip->regs->output, reg_val, off);
|
2008-02-05 06:28:26 +00:00
|
|
|
if (ret)
|
2011-02-10 23:01:23 +00:00
|
|
|
goto exit;
|
2008-02-05 06:28:26 +00:00
|
|
|
|
2013-01-22 21:10:23 +00:00
|
|
|
chip->reg_output[off / BANK_SZ] = reg_val;
|
2011-02-10 23:01:23 +00:00
|
|
|
exit:
|
|
|
|
mutex_unlock(&chip->i2c_lock);
|
2008-02-05 06:28:26 +00:00
|
|
|
}
|
|
|
|
|
2017-03-22 14:11:11 +00:00
|
|
|
static int pca953x_gpio_get_direction(struct gpio_chip *gc, unsigned off)
|
|
|
|
{
|
|
|
|
struct pca953x_chip *chip = gpiochip_get_data(gc);
|
|
|
|
u32 reg_val;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
mutex_lock(&chip->i2c_lock);
|
|
|
|
ret = pca953x_read_single(chip, chip->regs->direction, ®_val, off);
|
|
|
|
mutex_unlock(&chip->i2c_lock);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
return !!(reg_val & (1u << (off % BANK_SZ)));
|
|
|
|
}
|
|
|
|
|
2015-12-04 07:52:30 +00:00
|
|
|
static void pca953x_gpio_set_multiple(struct gpio_chip *gc,
|
2016-09-09 09:17:38 +00:00
|
|
|
unsigned long *mask, unsigned long *bits)
|
2015-12-04 07:52:30 +00:00
|
|
|
{
|
2015-12-07 10:20:54 +00:00
|
|
|
struct pca953x_chip *chip = gpiochip_get_data(gc);
|
2016-09-09 09:17:38 +00:00
|
|
|
unsigned int bank_mask, bank_val;
|
|
|
|
int bank_shift, bank;
|
2015-12-04 07:52:30 +00:00
|
|
|
u8 reg_val[MAX_BANK];
|
2016-09-09 09:17:34 +00:00
|
|
|
int ret;
|
2016-09-09 09:17:38 +00:00
|
|
|
|
|
|
|
bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
|
2015-12-04 07:52:30 +00:00
|
|
|
|
|
|
|
mutex_lock(&chip->i2c_lock);
|
2016-11-08 05:18:11 +00:00
|
|
|
memcpy(reg_val, chip->reg_output, NBANK(chip));
|
2016-09-09 09:17:38 +00:00
|
|
|
for (bank = 0; bank < NBANK(chip); bank++) {
|
|
|
|
bank_mask = mask[bank / sizeof(*mask)] >>
|
|
|
|
((bank % sizeof(*mask)) * 8);
|
|
|
|
if (bank_mask) {
|
|
|
|
bank_val = bits[bank / sizeof(*bits)] >>
|
|
|
|
((bank % sizeof(*bits)) * 8);
|
2016-11-08 06:00:45 +00:00
|
|
|
bank_val &= bank_mask;
|
2016-09-09 09:17:38 +00:00
|
|
|
reg_val[bank] = (reg_val[bank] & ~bank_mask) | bank_val;
|
2015-12-04 07:52:30 +00:00
|
|
|
}
|
|
|
|
}
|
2016-09-09 09:17:38 +00:00
|
|
|
|
2016-09-09 09:17:34 +00:00
|
|
|
ret = i2c_smbus_write_i2c_block_data(chip->client,
|
|
|
|
chip->regs->output << bank_shift,
|
|
|
|
NBANK(chip), reg_val);
|
2015-12-04 07:52:30 +00:00
|
|
|
if (ret)
|
|
|
|
goto exit;
|
|
|
|
|
|
|
|
memcpy(chip->reg_output, reg_val, NBANK(chip));
|
|
|
|
exit:
|
|
|
|
mutex_unlock(&chip->i2c_lock);
|
|
|
|
}
|
|
|
|
|
2008-02-06 09:39:04 +00:00
|
|
|
static void pca953x_setup_gpio(struct pca953x_chip *chip, int gpios)
|
2008-02-05 06:28:26 +00:00
|
|
|
{
|
|
|
|
struct gpio_chip *gc;
|
|
|
|
|
|
|
|
gc = &chip->gpio_chip;
|
|
|
|
|
2008-02-06 09:39:03 +00:00
|
|
|
gc->direction_input = pca953x_gpio_direction_input;
|
|
|
|
gc->direction_output = pca953x_gpio_direction_output;
|
|
|
|
gc->get = pca953x_gpio_get_value;
|
|
|
|
gc->set = pca953x_gpio_set_value;
|
2017-03-22 14:11:11 +00:00
|
|
|
gc->get_direction = pca953x_gpio_get_direction;
|
2015-12-04 07:52:30 +00:00
|
|
|
gc->set_multiple = pca953x_gpio_set_multiple;
|
2013-12-04 13:42:46 +00:00
|
|
|
gc->can_sleep = true;
|
2008-02-05 06:28:26 +00:00
|
|
|
|
|
|
|
gc->base = chip->gpio_start;
|
2008-02-06 09:39:04 +00:00
|
|
|
gc->ngpio = gpios;
|
|
|
|
gc->label = chip->client->name;
|
2015-11-04 08:56:26 +00:00
|
|
|
gc->parent = &chip->client->dev;
|
2008-04-28 09:14:45 +00:00
|
|
|
gc->owner = THIS_MODULE;
|
2009-06-17 23:26:15 +00:00
|
|
|
gc->names = chip->names;
|
2008-02-05 06:28:26 +00:00
|
|
|
}
|
|
|
|
|
2010-03-05 21:44:36 +00:00
|
|
|
#ifdef CONFIG_GPIO_PCA953X_IRQ
|
2011-01-13 01:00:15 +00:00
|
|
|
static void pca953x_irq_mask(struct irq_data *d)
|
2010-03-05 21:44:36 +00:00
|
|
|
{
|
2014-05-09 11:27:57 +00:00
|
|
|
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
|
2015-12-07 10:20:54 +00:00
|
|
|
struct pca953x_chip *chip = gpiochip_get_data(gc);
|
2010-03-05 21:44:36 +00:00
|
|
|
|
2013-01-22 21:10:23 +00:00
|
|
|
chip->irq_mask[d->hwirq / BANK_SZ] &= ~(1 << (d->hwirq % BANK_SZ));
|
2010-03-05 21:44:36 +00:00
|
|
|
}
|
|
|
|
|
2011-01-13 01:00:15 +00:00
|
|
|
static void pca953x_irq_unmask(struct irq_data *d)
|
2010-03-05 21:44:36 +00:00
|
|
|
{
|
2014-05-09 11:27:57 +00:00
|
|
|
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
|
2015-12-07 10:20:54 +00:00
|
|
|
struct pca953x_chip *chip = gpiochip_get_data(gc);
|
2010-03-05 21:44:36 +00:00
|
|
|
|
2013-01-22 21:10:23 +00:00
|
|
|
chip->irq_mask[d->hwirq / BANK_SZ] |= 1 << (d->hwirq % BANK_SZ);
|
2010-03-05 21:44:36 +00:00
|
|
|
}
|
|
|
|
|
2011-01-13 01:00:15 +00:00
|
|
|
static void pca953x_irq_bus_lock(struct irq_data *d)
|
2010-03-05 21:44:36 +00:00
|
|
|
{
|
2014-05-09 11:27:57 +00:00
|
|
|
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
|
2015-12-07 10:20:54 +00:00
|
|
|
struct pca953x_chip *chip = gpiochip_get_data(gc);
|
2010-03-05 21:44:36 +00:00
|
|
|
|
|
|
|
mutex_lock(&chip->irq_lock);
|
|
|
|
}
|
|
|
|
|
2011-01-13 01:00:15 +00:00
|
|
|
static void pca953x_irq_bus_sync_unlock(struct irq_data *d)
|
2010-03-05 21:44:36 +00:00
|
|
|
{
|
2014-05-09 11:27:57 +00:00
|
|
|
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
|
2015-12-07 10:20:54 +00:00
|
|
|
struct pca953x_chip *chip = gpiochip_get_data(gc);
|
2013-01-22 21:10:23 +00:00
|
|
|
u8 new_irqs;
|
|
|
|
int level, i;
|
2016-04-07 04:56:32 +00:00
|
|
|
u8 invert_irq_mask[MAX_BANK];
|
|
|
|
|
|
|
|
if (chip->driver_data & PCA_PCAL) {
|
|
|
|
/* Enable latch on interrupt-enabled inputs */
|
|
|
|
pca953x_write_regs(chip, PCAL953X_IN_LATCH, chip->irq_mask);
|
|
|
|
|
|
|
|
for (i = 0; i < NBANK(chip); i++)
|
|
|
|
invert_irq_mask[i] = ~chip->irq_mask[i];
|
|
|
|
|
|
|
|
/* Unmask enabled interrupts */
|
|
|
|
pca953x_write_regs(chip, PCAL953X_INT_MASK, invert_irq_mask);
|
|
|
|
}
|
2010-04-27 20:13:07 +00:00
|
|
|
|
|
|
|
/* Look for any newly setup interrupt */
|
2013-01-22 21:10:23 +00:00
|
|
|
for (i = 0; i < NBANK(chip); i++) {
|
|
|
|
new_irqs = chip->irq_trig_fall[i] | chip->irq_trig_raise[i];
|
|
|
|
new_irqs &= ~chip->reg_direction[i];
|
|
|
|
|
|
|
|
while (new_irqs) {
|
|
|
|
level = __ffs(new_irqs);
|
|
|
|
pca953x_gpio_direction_input(&chip->gpio_chip,
|
|
|
|
level + (BANK_SZ * i));
|
|
|
|
new_irqs &= ~(1 << level);
|
|
|
|
}
|
2010-04-27 20:13:07 +00:00
|
|
|
}
|
2010-03-05 21:44:36 +00:00
|
|
|
|
|
|
|
mutex_unlock(&chip->irq_lock);
|
|
|
|
}
|
|
|
|
|
2011-01-13 01:00:15 +00:00
|
|
|
static int pca953x_irq_set_type(struct irq_data *d, unsigned int type)
|
2010-03-05 21:44:36 +00:00
|
|
|
{
|
2014-05-09 11:27:57 +00:00
|
|
|
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
|
2015-12-07 10:20:54 +00:00
|
|
|
struct pca953x_chip *chip = gpiochip_get_data(gc);
|
2013-01-22 21:10:23 +00:00
|
|
|
int bank_nb = d->hwirq / BANK_SZ;
|
|
|
|
u8 mask = 1 << (d->hwirq % BANK_SZ);
|
2010-03-05 21:44:36 +00:00
|
|
|
|
|
|
|
if (!(type & IRQ_TYPE_EDGE_BOTH)) {
|
|
|
|
dev_err(&chip->client->dev, "irq %d: unsupported type %d\n",
|
2011-01-13 01:00:15 +00:00
|
|
|
d->irq, type);
|
2010-03-05 21:44:36 +00:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (type & IRQ_TYPE_EDGE_FALLING)
|
2013-01-22 21:10:23 +00:00
|
|
|
chip->irq_trig_fall[bank_nb] |= mask;
|
2010-03-05 21:44:36 +00:00
|
|
|
else
|
2013-01-22 21:10:23 +00:00
|
|
|
chip->irq_trig_fall[bank_nb] &= ~mask;
|
2010-03-05 21:44:36 +00:00
|
|
|
|
|
|
|
if (type & IRQ_TYPE_EDGE_RISING)
|
2013-01-22 21:10:23 +00:00
|
|
|
chip->irq_trig_raise[bank_nb] |= mask;
|
2010-03-05 21:44:36 +00:00
|
|
|
else
|
2013-01-22 21:10:23 +00:00
|
|
|
chip->irq_trig_raise[bank_nb] &= ~mask;
|
2010-03-05 21:44:36 +00:00
|
|
|
|
2010-04-27 20:13:07 +00:00
|
|
|
return 0;
|
2010-03-05 21:44:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static struct irq_chip pca953x_irq_chip = {
|
|
|
|
.name = "pca953x",
|
2011-01-13 01:00:15 +00:00
|
|
|
.irq_mask = pca953x_irq_mask,
|
|
|
|
.irq_unmask = pca953x_irq_unmask,
|
|
|
|
.irq_bus_lock = pca953x_irq_bus_lock,
|
|
|
|
.irq_bus_sync_unlock = pca953x_irq_bus_sync_unlock,
|
|
|
|
.irq_set_type = pca953x_irq_set_type,
|
2010-03-05 21:44:36 +00:00
|
|
|
};
|
|
|
|
|
2015-05-22 00:35:12 +00:00
|
|
|
static bool pca953x_irq_pending(struct pca953x_chip *chip, u8 *pending)
|
2010-03-05 21:44:36 +00:00
|
|
|
{
|
2013-01-22 21:10:23 +00:00
|
|
|
u8 cur_stat[MAX_BANK];
|
|
|
|
u8 old_stat[MAX_BANK];
|
2015-05-22 00:35:12 +00:00
|
|
|
bool pending_seen = false;
|
|
|
|
bool trigger_seen = false;
|
|
|
|
u8 trigger[MAX_BANK];
|
2016-09-09 09:17:34 +00:00
|
|
|
int ret, i;
|
2011-04-18 14:12:46 +00:00
|
|
|
|
2016-04-07 04:56:32 +00:00
|
|
|
if (chip->driver_data & PCA_PCAL) {
|
|
|
|
/* Read the current interrupt status from the device */
|
|
|
|
ret = pca953x_read_regs(chip, PCAL953X_INT_STAT, trigger);
|
|
|
|
if (ret)
|
|
|
|
return false;
|
|
|
|
|
|
|
|
/* Check latched inputs and clear interrupt status */
|
|
|
|
ret = pca953x_read_regs(chip, PCA953X_INPUT, cur_stat);
|
|
|
|
if (ret)
|
|
|
|
return false;
|
|
|
|
|
|
|
|
for (i = 0; i < NBANK(chip); i++) {
|
|
|
|
/* Apply filter for rising/falling edge selection */
|
|
|
|
pending[i] = (~cur_stat[i] & chip->irq_trig_fall[i]) |
|
|
|
|
(cur_stat[i] & chip->irq_trig_raise[i]);
|
|
|
|
pending[i] &= trigger[i];
|
|
|
|
if (pending[i])
|
|
|
|
pending_seen = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
return pending_seen;
|
|
|
|
}
|
|
|
|
|
2016-09-09 09:17:34 +00:00
|
|
|
ret = pca953x_read_regs(chip, chip->regs->input, cur_stat);
|
2010-03-05 21:44:36 +00:00
|
|
|
if (ret)
|
2015-05-22 00:35:12 +00:00
|
|
|
return false;
|
2010-03-05 21:44:36 +00:00
|
|
|
|
|
|
|
/* Remove output pins from the equation */
|
2013-01-22 21:10:23 +00:00
|
|
|
for (i = 0; i < NBANK(chip); i++)
|
|
|
|
cur_stat[i] &= chip->reg_direction[i];
|
2010-03-05 21:44:36 +00:00
|
|
|
|
2013-01-22 21:10:23 +00:00
|
|
|
memcpy(old_stat, chip->irq_stat, NBANK(chip));
|
2010-03-05 21:44:36 +00:00
|
|
|
|
2013-01-22 21:10:23 +00:00
|
|
|
for (i = 0; i < NBANK(chip); i++) {
|
|
|
|
trigger[i] = (cur_stat[i] ^ old_stat[i]) & chip->irq_mask[i];
|
2015-05-22 00:35:12 +00:00
|
|
|
if (trigger[i])
|
|
|
|
trigger_seen = true;
|
2013-01-22 21:10:23 +00:00
|
|
|
}
|
|
|
|
|
2015-05-22 00:35:12 +00:00
|
|
|
if (!trigger_seen)
|
|
|
|
return false;
|
2010-03-05 21:44:36 +00:00
|
|
|
|
2013-01-22 21:10:23 +00:00
|
|
|
memcpy(chip->irq_stat, cur_stat, NBANK(chip));
|
2010-03-05 21:44:36 +00:00
|
|
|
|
2013-01-22 21:10:23 +00:00
|
|
|
for (i = 0; i < NBANK(chip); i++) {
|
|
|
|
pending[i] = (old_stat[i] & chip->irq_trig_fall[i]) |
|
|
|
|
(cur_stat[i] & chip->irq_trig_raise[i]);
|
|
|
|
pending[i] &= trigger[i];
|
2015-05-22 00:35:12 +00:00
|
|
|
if (pending[i])
|
|
|
|
pending_seen = true;
|
2013-01-22 21:10:23 +00:00
|
|
|
}
|
2010-03-05 21:44:36 +00:00
|
|
|
|
2015-05-22 00:35:12 +00:00
|
|
|
return pending_seen;
|
2010-03-05 21:44:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static irqreturn_t pca953x_irq_handler(int irq, void *devid)
|
|
|
|
{
|
|
|
|
struct pca953x_chip *chip = devid;
|
2013-01-22 21:10:23 +00:00
|
|
|
u8 pending[MAX_BANK];
|
|
|
|
u8 level;
|
2014-04-30 08:01:40 +00:00
|
|
|
unsigned nhandled = 0;
|
2013-01-22 21:10:23 +00:00
|
|
|
int i;
|
2010-03-05 21:44:36 +00:00
|
|
|
|
2013-01-22 21:10:23 +00:00
|
|
|
if (!pca953x_irq_pending(chip, pending))
|
2014-04-30 08:01:40 +00:00
|
|
|
return IRQ_NONE;
|
2010-03-05 21:44:36 +00:00
|
|
|
|
2013-01-22 21:10:23 +00:00
|
|
|
for (i = 0; i < NBANK(chip); i++) {
|
|
|
|
while (pending[i]) {
|
|
|
|
level = __ffs(pending[i]);
|
2014-05-09 11:27:57 +00:00
|
|
|
handle_nested_irq(irq_find_mapping(chip->gpio_chip.irqdomain,
|
2013-01-22 21:10:23 +00:00
|
|
|
level + (BANK_SZ * i)));
|
|
|
|
pending[i] &= ~(1 << level);
|
2014-04-30 08:01:40 +00:00
|
|
|
nhandled++;
|
2013-01-22 21:10:23 +00:00
|
|
|
}
|
|
|
|
}
|
2010-03-05 21:44:36 +00:00
|
|
|
|
2014-04-30 08:01:40 +00:00
|
|
|
return (nhandled > 0) ? IRQ_HANDLED : IRQ_NONE;
|
2010-03-05 21:44:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int pca953x_irq_setup(struct pca953x_chip *chip,
|
2011-06-14 09:00:55 +00:00
|
|
|
int irq_base)
|
2010-03-05 21:44:36 +00:00
|
|
|
{
|
|
|
|
struct i2c_client *client = chip->client;
|
2016-09-09 09:17:34 +00:00
|
|
|
int ret, i;
|
2010-03-05 21:44:36 +00:00
|
|
|
|
2014-07-29 07:24:43 +00:00
|
|
|
if (client->irq && irq_base != -1
|
2015-10-01 11:20:27 +00:00
|
|
|
&& (chip->driver_data & PCA_INT)) {
|
2016-09-09 09:17:34 +00:00
|
|
|
ret = pca953x_read_regs(chip,
|
|
|
|
chip->regs->input, chip->irq_stat);
|
2010-03-05 21:44:36 +00:00
|
|
|
if (ret)
|
2013-01-25 16:59:28 +00:00
|
|
|
return ret;
|
2010-03-05 21:44:36 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* There is no way to know which GPIO line generated the
|
|
|
|
* interrupt. We have to rely on the previous read for
|
|
|
|
* this purpose.
|
|
|
|
*/
|
2013-01-22 21:10:23 +00:00
|
|
|
for (i = 0; i < NBANK(chip); i++)
|
|
|
|
chip->irq_stat[i] &= chip->reg_direction[i];
|
2010-03-05 21:44:36 +00:00
|
|
|
mutex_init(&chip->irq_lock);
|
|
|
|
|
2013-01-25 16:59:28 +00:00
|
|
|
ret = devm_request_threaded_irq(&client->dev,
|
|
|
|
client->irq,
|
2010-03-05 21:44:36 +00:00
|
|
|
NULL,
|
|
|
|
pca953x_irq_handler,
|
2014-04-30 08:01:41 +00:00
|
|
|
IRQF_TRIGGER_LOW | IRQF_ONESHOT |
|
|
|
|
IRQF_SHARED,
|
2010-03-05 21:44:36 +00:00
|
|
|
dev_name(&client->dev), chip);
|
|
|
|
if (ret) {
|
|
|
|
dev_err(&client->dev, "failed to request irq %d\n",
|
|
|
|
client->irq);
|
2013-01-25 16:59:27 +00:00
|
|
|
return ret;
|
2010-03-05 21:44:36 +00:00
|
|
|
}
|
|
|
|
|
2016-11-24 09:57:25 +00:00
|
|
|
ret = gpiochip_irqchip_add_nested(&chip->gpio_chip,
|
|
|
|
&pca953x_irq_chip,
|
|
|
|
irq_base,
|
|
|
|
handle_simple_irq,
|
|
|
|
IRQ_TYPE_NONE);
|
2014-05-09 11:27:57 +00:00
|
|
|
if (ret) {
|
|
|
|
dev_err(&client->dev,
|
|
|
|
"could not connect irqchip to gpiochip\n");
|
|
|
|
return ret;
|
|
|
|
}
|
2015-07-07 14:34:49 +00:00
|
|
|
|
2016-11-24 09:57:25 +00:00
|
|
|
gpiochip_set_nested_irqchip(&chip->gpio_chip,
|
|
|
|
&pca953x_irq_chip,
|
|
|
|
client->irq);
|
2010-03-05 21:44:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
#else /* CONFIG_GPIO_PCA953X_IRQ */
|
|
|
|
static int pca953x_irq_setup(struct pca953x_chip *chip,
|
2011-06-14 09:00:55 +00:00
|
|
|
int irq_base)
|
2010-03-05 21:44:36 +00:00
|
|
|
{
|
|
|
|
struct i2c_client *client = chip->client;
|
|
|
|
|
2015-10-01 11:20:27 +00:00
|
|
|
if (irq_base != -1 && (chip->driver_data & PCA_INT))
|
2010-03-05 21:44:36 +00:00
|
|
|
dev_warn(&client->dev, "interrupt support not compiled in\n");
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2012-11-19 18:22:34 +00:00
|
|
|
static int device_pca953x_init(struct pca953x_chip *chip, u32 invert)
|
2011-04-18 14:12:46 +00:00
|
|
|
{
|
|
|
|
int ret;
|
2013-01-22 21:10:23 +00:00
|
|
|
u8 val[MAX_BANK];
|
2011-04-18 14:12:46 +00:00
|
|
|
|
2016-09-09 09:17:34 +00:00
|
|
|
chip->regs = &pca953x_regs;
|
|
|
|
|
|
|
|
ret = pca953x_read_regs(chip, chip->regs->output, chip->reg_output);
|
2011-04-18 14:12:46 +00:00
|
|
|
if (ret)
|
|
|
|
goto out;
|
|
|
|
|
2016-09-09 09:17:34 +00:00
|
|
|
ret = pca953x_read_regs(chip, chip->regs->direction,
|
|
|
|
chip->reg_direction);
|
2011-04-18 14:12:46 +00:00
|
|
|
if (ret)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
/* set platform specific polarity inversion */
|
2013-01-22 21:10:23 +00:00
|
|
|
if (invert)
|
|
|
|
memset(val, 0xFF, NBANK(chip));
|
|
|
|
else
|
|
|
|
memset(val, 0, NBANK(chip));
|
|
|
|
|
|
|
|
ret = pca953x_write_regs(chip, PCA953X_INVERT, val);
|
2011-04-18 14:12:46 +00:00
|
|
|
out:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2012-11-19 18:22:34 +00:00
|
|
|
static int device_pca957x_init(struct pca953x_chip *chip, u32 invert)
|
2011-04-18 14:12:46 +00:00
|
|
|
{
|
|
|
|
int ret;
|
2013-01-22 21:10:23 +00:00
|
|
|
u8 val[MAX_BANK];
|
2011-04-18 14:12:46 +00:00
|
|
|
|
2016-09-09 09:17:34 +00:00
|
|
|
chip->regs = &pca957x_regs;
|
|
|
|
|
|
|
|
ret = pca953x_read_regs(chip, chip->regs->output, chip->reg_output);
|
2011-04-18 14:12:46 +00:00
|
|
|
if (ret)
|
|
|
|
goto out;
|
2016-09-09 09:17:34 +00:00
|
|
|
ret = pca953x_read_regs(chip, chip->regs->direction,
|
|
|
|
chip->reg_direction);
|
2011-04-18 14:12:46 +00:00
|
|
|
if (ret)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
/* set platform specific polarity inversion */
|
2013-01-22 21:10:23 +00:00
|
|
|
if (invert)
|
|
|
|
memset(val, 0xFF, NBANK(chip));
|
|
|
|
else
|
|
|
|
memset(val, 0, NBANK(chip));
|
2015-08-26 21:52:19 +00:00
|
|
|
ret = pca953x_write_regs(chip, PCA957X_INVRT, val);
|
|
|
|
if (ret)
|
|
|
|
goto out;
|
2011-04-18 14:12:46 +00:00
|
|
|
|
2015-05-18 18:41:43 +00:00
|
|
|
/* To enable register 6, 7 to control pull up and pull down */
|
2013-01-22 21:10:23 +00:00
|
|
|
memset(val, 0x02, NBANK(chip));
|
2015-08-26 21:52:19 +00:00
|
|
|
ret = pca953x_write_regs(chip, PCA957X_BKEN, val);
|
|
|
|
if (ret)
|
|
|
|
goto out;
|
2011-04-18 14:12:46 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
out:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2015-12-08 10:19:26 +00:00
|
|
|
static const struct of_device_id pca953x_dt_ids[];
|
|
|
|
|
2012-11-19 18:22:34 +00:00
|
|
|
static int pca953x_probe(struct i2c_client *client,
|
2016-09-24 09:06:29 +00:00
|
|
|
const struct i2c_device_id *i2c_id)
|
2008-02-05 06:28:26 +00:00
|
|
|
{
|
2008-02-06 09:39:03 +00:00
|
|
|
struct pca953x_platform_data *pdata;
|
|
|
|
struct pca953x_chip *chip;
|
2012-07-10 13:35:37 +00:00
|
|
|
int irq_base = 0;
|
2011-10-14 13:32:00 +00:00
|
|
|
int ret;
|
2012-07-10 13:35:37 +00:00
|
|
|
u32 invert = 0;
|
2016-07-29 03:39:55 +00:00
|
|
|
struct regulator *reg;
|
2008-02-05 06:28:26 +00:00
|
|
|
|
2013-01-25 16:59:28 +00:00
|
|
|
chip = devm_kzalloc(&client->dev,
|
|
|
|
sizeof(struct pca953x_chip), GFP_KERNEL);
|
2009-06-17 23:26:17 +00:00
|
|
|
if (chip == NULL)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
2013-07-30 08:08:05 +00:00
|
|
|
pdata = dev_get_platdata(&client->dev);
|
2011-06-14 09:00:55 +00:00
|
|
|
if (pdata) {
|
|
|
|
irq_base = pdata->irq_base;
|
|
|
|
chip->gpio_start = pdata->gpio_base;
|
|
|
|
invert = pdata->invert;
|
|
|
|
chip->names = pdata->names;
|
|
|
|
} else {
|
2017-01-10 19:29:51 +00:00
|
|
|
struct gpio_desc *reset_gpio;
|
|
|
|
|
2014-07-29 07:24:43 +00:00
|
|
|
chip->gpio_start = -1;
|
|
|
|
irq_base = 0;
|
2017-01-10 19:29:51 +00:00
|
|
|
|
2017-03-22 14:11:13 +00:00
|
|
|
/*
|
|
|
|
* See if we need to de-assert a reset pin.
|
|
|
|
*
|
|
|
|
* There is no known ACPI-enabled platforms that are
|
|
|
|
* using "reset" GPIO. Otherwise any of those platform
|
|
|
|
* must use _DSD method with corresponding property.
|
|
|
|
*/
|
2017-01-10 19:29:51 +00:00
|
|
|
reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
|
|
|
|
GPIOD_OUT_LOW);
|
|
|
|
if (IS_ERR(reset_gpio))
|
|
|
|
return PTR_ERR(reset_gpio);
|
2009-06-17 23:26:17 +00:00
|
|
|
}
|
2008-02-05 06:28:26 +00:00
|
|
|
|
|
|
|
chip->client = client;
|
|
|
|
|
2016-07-29 03:39:55 +00:00
|
|
|
reg = devm_regulator_get(&client->dev, "vcc");
|
|
|
|
if (IS_ERR(reg)) {
|
|
|
|
ret = PTR_ERR(reg);
|
|
|
|
if (ret != -EPROBE_DEFER)
|
|
|
|
dev_err(&client->dev, "reg get err: %d\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
ret = regulator_enable(reg);
|
|
|
|
if (ret) {
|
|
|
|
dev_err(&client->dev, "reg en err: %d\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
chip->regulator = reg;
|
|
|
|
|
2016-09-24 09:06:29 +00:00
|
|
|
if (i2c_id) {
|
|
|
|
chip->driver_data = i2c_id->driver_data;
|
2015-10-01 11:20:28 +00:00
|
|
|
} else {
|
2016-09-24 09:06:29 +00:00
|
|
|
const struct acpi_device_id *acpi_id;
|
2015-12-08 10:19:26 +00:00
|
|
|
const struct of_device_id *match;
|
2015-10-01 11:20:28 +00:00
|
|
|
|
2015-12-08 10:19:26 +00:00
|
|
|
match = of_match_device(pca953x_dt_ids, &client->dev);
|
|
|
|
if (match) {
|
|
|
|
chip->driver_data = (int)(uintptr_t)match->data;
|
|
|
|
} else {
|
2016-09-24 09:06:29 +00:00
|
|
|
acpi_id = acpi_match_device(pca953x_acpi_ids, &client->dev);
|
2016-10-07 21:12:21 +00:00
|
|
|
if (!acpi_id) {
|
2016-07-29 03:39:55 +00:00
|
|
|
ret = -ENODEV;
|
|
|
|
goto err_exit;
|
|
|
|
}
|
2015-10-01 11:20:28 +00:00
|
|
|
|
2016-09-24 09:06:29 +00:00
|
|
|
chip->driver_data = acpi_id->driver_data;
|
2015-12-08 10:19:26 +00:00
|
|
|
}
|
2015-10-01 11:20:28 +00:00
|
|
|
}
|
|
|
|
|
2011-02-10 23:01:23 +00:00
|
|
|
mutex_init(&chip->i2c_lock);
|
2016-09-26 09:54:15 +00:00
|
|
|
/*
|
|
|
|
* In case we have an i2c-mux controlled by a GPIO provided by an
|
|
|
|
* expander using the same driver higher on the device tree, read the
|
|
|
|
* i2c adapter nesting depth and use the retrieved value as lockdep
|
|
|
|
* subclass for chip->i2c_lock.
|
|
|
|
*
|
|
|
|
* REVISIT: This solution is not complete. It protects us from lockdep
|
|
|
|
* false positives when the expander controlling the i2c-mux is on
|
|
|
|
* a different level on the device tree, but not when it's on the same
|
|
|
|
* level on a different branch (in which case the subclass number
|
|
|
|
* would be the same).
|
|
|
|
*
|
|
|
|
* TODO: Once a correct solution is developed, a similar fix should be
|
|
|
|
* applied to all other i2c-controlled GPIO expanders (and potentially
|
|
|
|
* regmap-i2c).
|
|
|
|
*/
|
2016-09-16 16:02:45 +00:00
|
|
|
lockdep_set_subclass(&chip->i2c_lock,
|
|
|
|
i2c_adapter_depth(client->adapter));
|
2011-02-10 23:01:23 +00:00
|
|
|
|
2008-02-05 06:28:26 +00:00
|
|
|
/* initialize cached registers from their original values.
|
|
|
|
* we can't share this chip with another i2c master.
|
|
|
|
*/
|
2015-10-01 11:20:27 +00:00
|
|
|
pca953x_setup_gpio(chip, chip->driver_data & PCA_GPIO_MASK);
|
2008-02-06 09:39:04 +00:00
|
|
|
|
2016-09-09 09:17:35 +00:00
|
|
|
if (chip->gpio_chip.ngpio <= 8) {
|
|
|
|
chip->write_regs = pca953x_write_regs_8;
|
2016-09-09 09:17:36 +00:00
|
|
|
chip->read_regs = pca953x_read_regs_8;
|
2016-09-09 09:17:35 +00:00
|
|
|
} else if (chip->gpio_chip.ngpio >= 24) {
|
|
|
|
chip->write_regs = pca953x_write_regs_24;
|
2016-09-09 09:17:36 +00:00
|
|
|
chip->read_regs = pca953x_read_regs_24;
|
2016-09-09 09:17:35 +00:00
|
|
|
} else {
|
|
|
|
if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE)
|
|
|
|
chip->write_regs = pca953x_write_regs_16;
|
|
|
|
else
|
|
|
|
chip->write_regs = pca957x_write_regs_16;
|
2016-09-09 09:17:36 +00:00
|
|
|
chip->read_regs = pca953x_read_regs_16;
|
2016-09-09 09:17:35 +00:00
|
|
|
}
|
|
|
|
|
2016-09-09 09:17:37 +00:00
|
|
|
if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE)
|
2011-10-14 13:32:00 +00:00
|
|
|
ret = device_pca953x_init(chip, invert);
|
2011-04-18 14:12:46 +00:00
|
|
|
else
|
2011-10-14 13:32:00 +00:00
|
|
|
ret = device_pca957x_init(chip, invert);
|
|
|
|
if (ret)
|
2016-07-29 03:39:55 +00:00
|
|
|
goto err_exit;
|
2008-02-05 06:28:26 +00:00
|
|
|
|
2016-02-22 12:13:28 +00:00
|
|
|
ret = devm_gpiochip_add_data(&client->dev, &chip->gpio_chip, chip);
|
2010-03-05 21:44:36 +00:00
|
|
|
if (ret)
|
2016-07-29 03:39:55 +00:00
|
|
|
goto err_exit;
|
2008-02-06 09:39:04 +00:00
|
|
|
|
2015-10-01 11:20:27 +00:00
|
|
|
ret = pca953x_irq_setup(chip, irq_base);
|
2008-02-05 06:28:26 +00:00
|
|
|
if (ret)
|
2016-07-29 03:39:55 +00:00
|
|
|
goto err_exit;
|
2008-02-05 06:28:26 +00:00
|
|
|
|
2011-06-14 09:00:55 +00:00
|
|
|
if (pdata && pdata->setup) {
|
2008-02-05 06:28:26 +00:00
|
|
|
ret = pdata->setup(client, chip->gpio_chip.base,
|
|
|
|
chip->gpio_chip.ngpio, pdata->context);
|
|
|
|
if (ret < 0)
|
|
|
|
dev_warn(&client->dev, "setup failed, %d\n", ret);
|
|
|
|
}
|
|
|
|
|
|
|
|
i2c_set_clientdata(client, chip);
|
|
|
|
return 0;
|
2016-07-29 03:39:55 +00:00
|
|
|
|
|
|
|
err_exit:
|
|
|
|
regulator_disable(chip->regulator);
|
|
|
|
return ret;
|
2008-02-05 06:28:26 +00:00
|
|
|
}
|
|
|
|
|
2008-02-06 09:39:03 +00:00
|
|
|
static int pca953x_remove(struct i2c_client *client)
|
2008-02-05 06:28:26 +00:00
|
|
|
{
|
2013-07-30 08:08:05 +00:00
|
|
|
struct pca953x_platform_data *pdata = dev_get_platdata(&client->dev);
|
2008-02-06 09:39:03 +00:00
|
|
|
struct pca953x_chip *chip = i2c_get_clientdata(client);
|
2016-09-13 12:43:23 +00:00
|
|
|
int ret;
|
2008-02-05 06:28:26 +00:00
|
|
|
|
2011-06-14 09:00:55 +00:00
|
|
|
if (pdata && pdata->teardown) {
|
2008-02-05 06:28:26 +00:00
|
|
|
ret = pdata->teardown(client, chip->gpio_chip.base,
|
|
|
|
chip->gpio_chip.ngpio, pdata->context);
|
2016-07-29 03:39:55 +00:00
|
|
|
if (ret < 0)
|
2008-02-05 06:28:26 +00:00
|
|
|
dev_err(&client->dev, "%s failed, %d\n",
|
|
|
|
"teardown", ret);
|
2016-08-26 15:25:42 +00:00
|
|
|
} else {
|
|
|
|
ret = 0;
|
2008-02-05 06:28:26 +00:00
|
|
|
}
|
|
|
|
|
2016-07-29 03:39:55 +00:00
|
|
|
regulator_disable(chip->regulator);
|
|
|
|
|
|
|
|
return ret;
|
2008-02-05 06:28:26 +00:00
|
|
|
}
|
|
|
|
|
2015-12-08 10:19:26 +00:00
|
|
|
/* convenience to stop overlong match-table lines */
|
|
|
|
#define OF_953X(__nrgpio, __int) (void *)(__nrgpio | PCA953X_TYPE | __int)
|
|
|
|
#define OF_957X(__nrgpio, __int) (void *)(__nrgpio | PCA957X_TYPE | __int)
|
|
|
|
|
2012-11-08 17:01:52 +00:00
|
|
|
static const struct of_device_id pca953x_dt_ids[] = {
|
2015-12-08 10:19:26 +00:00
|
|
|
{ .compatible = "nxp,pca9505", .data = OF_953X(40, PCA_INT), },
|
|
|
|
{ .compatible = "nxp,pca9534", .data = OF_953X( 8, PCA_INT), },
|
|
|
|
{ .compatible = "nxp,pca9535", .data = OF_953X(16, PCA_INT), },
|
|
|
|
{ .compatible = "nxp,pca9536", .data = OF_953X( 4, 0), },
|
|
|
|
{ .compatible = "nxp,pca9537", .data = OF_953X( 4, PCA_INT), },
|
|
|
|
{ .compatible = "nxp,pca9538", .data = OF_953X( 8, PCA_INT), },
|
|
|
|
{ .compatible = "nxp,pca9539", .data = OF_953X(16, PCA_INT), },
|
|
|
|
{ .compatible = "nxp,pca9554", .data = OF_953X( 8, PCA_INT), },
|
|
|
|
{ .compatible = "nxp,pca9555", .data = OF_953X(16, PCA_INT), },
|
|
|
|
{ .compatible = "nxp,pca9556", .data = OF_953X( 8, 0), },
|
|
|
|
{ .compatible = "nxp,pca9557", .data = OF_953X( 8, 0), },
|
|
|
|
{ .compatible = "nxp,pca9574", .data = OF_957X( 8, PCA_INT), },
|
|
|
|
{ .compatible = "nxp,pca9575", .data = OF_957X(16, PCA_INT), },
|
|
|
|
{ .compatible = "nxp,pca9698", .data = OF_953X(40, 0), },
|
|
|
|
|
|
|
|
{ .compatible = "maxim,max7310", .data = OF_953X( 8, 0), },
|
|
|
|
{ .compatible = "maxim,max7312", .data = OF_953X(16, PCA_INT), },
|
|
|
|
{ .compatible = "maxim,max7313", .data = OF_953X(16, PCA_INT), },
|
|
|
|
{ .compatible = "maxim,max7315", .data = OF_953X( 8, PCA_INT), },
|
2016-10-17 16:36:49 +00:00
|
|
|
{ .compatible = "maxim,max7318", .data = OF_953X(16, PCA_INT), },
|
2015-12-08 10:19:26 +00:00
|
|
|
|
|
|
|
{ .compatible = "ti,pca6107", .data = OF_953X( 8, PCA_INT), },
|
2016-05-19 06:47:29 +00:00
|
|
|
{ .compatible = "ti,pca9536", .data = OF_953X( 4, 0), },
|
2015-12-08 10:19:26 +00:00
|
|
|
{ .compatible = "ti,tca6408", .data = OF_953X( 8, PCA_INT), },
|
|
|
|
{ .compatible = "ti,tca6416", .data = OF_953X(16, PCA_INT), },
|
|
|
|
{ .compatible = "ti,tca6424", .data = OF_953X(24, PCA_INT), },
|
|
|
|
|
|
|
|
{ .compatible = "onsemi,pca9654", .data = OF_953X( 8, PCA_INT), },
|
|
|
|
|
|
|
|
{ .compatible = "exar,xra1202", .data = OF_953X( 8, 0), },
|
2012-11-08 17:01:52 +00:00
|
|
|
{ }
|
|
|
|
};
|
|
|
|
|
|
|
|
MODULE_DEVICE_TABLE(of, pca953x_dt_ids);
|
|
|
|
|
2008-02-06 09:39:03 +00:00
|
|
|
static struct i2c_driver pca953x_driver = {
|
2008-02-05 06:28:26 +00:00
|
|
|
.driver = {
|
2008-02-06 09:39:03 +00:00
|
|
|
.name = "pca953x",
|
2012-11-08 17:01:52 +00:00
|
|
|
.of_match_table = pca953x_dt_ids,
|
2015-10-01 11:20:28 +00:00
|
|
|
.acpi_match_table = ACPI_PTR(pca953x_acpi_ids),
|
2008-02-05 06:28:26 +00:00
|
|
|
},
|
2008-02-06 09:39:03 +00:00
|
|
|
.probe = pca953x_probe,
|
|
|
|
.remove = pca953x_remove,
|
2008-04-29 21:11:40 +00:00
|
|
|
.id_table = pca953x_id,
|
2008-02-05 06:28:26 +00:00
|
|
|
};
|
|
|
|
|
2008-02-06 09:39:03 +00:00
|
|
|
static int __init pca953x_init(void)
|
2008-02-05 06:28:26 +00:00
|
|
|
{
|
2008-02-06 09:39:03 +00:00
|
|
|
return i2c_add_driver(&pca953x_driver);
|
2008-02-05 06:28:26 +00:00
|
|
|
}
|
2008-10-16 05:03:13 +00:00
|
|
|
/* register after i2c postcore initcall and before
|
|
|
|
* subsys initcalls that may rely on these GPIOs
|
|
|
|
*/
|
|
|
|
subsys_initcall(pca953x_init);
|
2008-02-05 06:28:26 +00:00
|
|
|
|
2008-02-06 09:39:03 +00:00
|
|
|
static void __exit pca953x_exit(void)
|
2008-02-05 06:28:26 +00:00
|
|
|
{
|
2008-02-06 09:39:03 +00:00
|
|
|
i2c_del_driver(&pca953x_driver);
|
2008-02-05 06:28:26 +00:00
|
|
|
}
|
2008-02-06 09:39:03 +00:00
|
|
|
module_exit(pca953x_exit);
|
2008-02-05 06:28:26 +00:00
|
|
|
|
|
|
|
MODULE_AUTHOR("eric miao <eric.miao@marvell.com>");
|
2008-02-06 09:39:03 +00:00
|
|
|
MODULE_DESCRIPTION("GPIO expander driver for PCA953x");
|
2008-02-05 06:28:26 +00:00
|
|
|
MODULE_LICENSE("GPL");
|