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linux/drivers/mfd/ab8500-core.c
Minghao Chi (CGEL ZTE) fc832ac987 mfd: Use platform_get_irq() to get the interrupt 
It is not recommened to use platform_get_resource(pdev, IORESOURCE_IRQ)
for requesting IRQ's resources any more, as they can be not ready yet in
case of DT-booting.

platform_get_irq() instead is a recommended way for getting IRQ even if
it was not retrieved earlier.

It also makes code simpler because we're getting "int" value right away
and no conversion from resource to int is required.

The print function dev_err() is redundant because platform_get_irq()
already prints an error.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi (CGEL ZTE) <chi.minghao@zte.com.cn>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20220309035607.2080884-1-chi.minghao@zte.com.cn
2022-03-23 14:51:51 +00:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) ST-Ericsson SA 2010
*
* Author: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
* Author: Rabin Vincent <rabin.vincent@stericsson.com>
* Author: Mattias Wallin <mattias.wallin@stericsson.com>
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
#include <linux/platform_device.h>
#include <linux/mfd/core.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/mfd/dbx500-prcmu.h>
#include <linux/of.h>
#include <linux/of_device.h>
/*
* Interrupt register offsets
* Bank : 0x0E
*/
#define AB8500_IT_SOURCE1_REG 0x00
#define AB8500_IT_SOURCE2_REG 0x01
#define AB8500_IT_SOURCE3_REG 0x02
#define AB8500_IT_SOURCE4_REG 0x03
#define AB8500_IT_SOURCE5_REG 0x04
#define AB8500_IT_SOURCE6_REG 0x05
#define AB8500_IT_SOURCE7_REG 0x06
#define AB8500_IT_SOURCE8_REG 0x07
#define AB9540_IT_SOURCE13_REG 0x0C
#define AB8500_IT_SOURCE19_REG 0x12
#define AB8500_IT_SOURCE20_REG 0x13
#define AB8500_IT_SOURCE21_REG 0x14
#define AB8500_IT_SOURCE22_REG 0x15
#define AB8500_IT_SOURCE23_REG 0x16
#define AB8500_IT_SOURCE24_REG 0x17
/*
* latch registers
*/
#define AB8500_IT_LATCH1_REG 0x20
#define AB8500_IT_LATCH2_REG 0x21
#define AB8500_IT_LATCH3_REG 0x22
#define AB8500_IT_LATCH4_REG 0x23
#define AB8500_IT_LATCH5_REG 0x24
#define AB8500_IT_LATCH6_REG 0x25
#define AB8500_IT_LATCH7_REG 0x26
#define AB8500_IT_LATCH8_REG 0x27
#define AB8500_IT_LATCH9_REG 0x28
#define AB8500_IT_LATCH10_REG 0x29
#define AB8500_IT_LATCH12_REG 0x2B
#define AB9540_IT_LATCH13_REG 0x2C
#define AB8500_IT_LATCH19_REG 0x32
#define AB8500_IT_LATCH20_REG 0x33
#define AB8500_IT_LATCH21_REG 0x34
#define AB8500_IT_LATCH22_REG 0x35
#define AB8500_IT_LATCH23_REG 0x36
#define AB8500_IT_LATCH24_REG 0x37
/*
* mask registers
*/
#define AB8500_IT_MASK1_REG 0x40
#define AB8500_IT_MASK2_REG 0x41
#define AB8500_IT_MASK3_REG 0x42
#define AB8500_IT_MASK4_REG 0x43
#define AB8500_IT_MASK5_REG 0x44
#define AB8500_IT_MASK6_REG 0x45
#define AB8500_IT_MASK7_REG 0x46
#define AB8500_IT_MASK8_REG 0x47
#define AB8500_IT_MASK9_REG 0x48
#define AB8500_IT_MASK10_REG 0x49
#define AB8500_IT_MASK11_REG 0x4A
#define AB8500_IT_MASK12_REG 0x4B
#define AB8500_IT_MASK13_REG 0x4C
#define AB8500_IT_MASK14_REG 0x4D
#define AB8500_IT_MASK15_REG 0x4E
#define AB8500_IT_MASK16_REG 0x4F
#define AB8500_IT_MASK17_REG 0x50
#define AB8500_IT_MASK18_REG 0x51
#define AB8500_IT_MASK19_REG 0x52
#define AB8500_IT_MASK20_REG 0x53
#define AB8500_IT_MASK21_REG 0x54
#define AB8500_IT_MASK22_REG 0x55
#define AB8500_IT_MASK23_REG 0x56
#define AB8500_IT_MASK24_REG 0x57
#define AB8500_IT_MASK25_REG 0x58
/*
* latch hierarchy registers
*/
#define AB8500_IT_LATCHHIER1_REG 0x60
#define AB8500_IT_LATCHHIER2_REG 0x61
#define AB8500_IT_LATCHHIER3_REG 0x62
#define AB8540_IT_LATCHHIER4_REG 0x63
#define AB8500_IT_LATCHHIER_NUM 3
#define AB8540_IT_LATCHHIER_NUM 4
#define AB8500_REV_REG 0x80
#define AB8500_IC_NAME_REG 0x82
#define AB8500_SWITCH_OFF_STATUS 0x00
#define AB8500_TURN_ON_STATUS 0x00
#define AB8505_TURN_ON_STATUS_2 0x04
#define AB8500_CH_USBCH_STAT1_REG 0x02
#define VBUS_DET_DBNC100 0x02
#define VBUS_DET_DBNC1 0x01
static DEFINE_SPINLOCK(on_stat_lock);
static u8 turn_on_stat_mask = 0xFF;
static u8 turn_on_stat_set;
#define AB9540_MODEM_CTRL2_REG 0x23
#define AB9540_MODEM_CTRL2_SWDBBRSTN_BIT BIT(2)
/*
* Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
* numbers are indexed into this array with (num / 8). The interupts are
* defined in linux/mfd/ab8500.h
*
* This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at
* offset 0.
*/
/* AB8500 support */
static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = {
0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21,
};
/* AB9540 / AB8505 support */
static const int ab9540_irq_regoffset[AB9540_NUM_IRQ_REGS] = {
0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22, 23
};
/* AB8540 support */
static const int ab8540_irq_regoffset[AB8540_NUM_IRQ_REGS] = {
0, 1, 2, 3, 4, -1, -1, -1, -1, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22,
23, 25, 26, 27, 28, 29, 30, 31,
};
static const char ab8500_version_str[][7] = {
[AB8500_VERSION_AB8500] = "AB8500",
[AB8500_VERSION_AB8505] = "AB8505",
[AB8500_VERSION_AB9540] = "AB9540",
[AB8500_VERSION_AB8540] = "AB8540",
};
static int ab8500_prcmu_write(struct ab8500 *ab8500, u16 addr, u8 data)
{
int ret;
ret = prcmu_abb_write((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
if (ret < 0)
dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
return ret;
}
static int ab8500_prcmu_write_masked(struct ab8500 *ab8500, u16 addr, u8 mask,
u8 data)
{
int ret;
ret = prcmu_abb_write_masked((u8)(addr >> 8), (u8)(addr & 0xFF), &data,
&mask, 1);
if (ret < 0)
dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
return ret;
}
static int ab8500_prcmu_read(struct ab8500 *ab8500, u16 addr)
{
int ret;
u8 data;
ret = prcmu_abb_read((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
if (ret < 0) {
dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
return ret;
}
return (int)data;
}
static int ab8500_get_chip_id(struct device *dev)
{
struct ab8500 *ab8500;
if (!dev)
return -EINVAL;
ab8500 = dev_get_drvdata(dev->parent);
return ab8500 ? (int)ab8500->chip_id : -EINVAL;
}
static int set_register_interruptible(struct ab8500 *ab8500, u8 bank,
u8 reg, u8 data)
{
int ret;
/*
* Put the u8 bank and u8 register together into a an u16.
* The bank on higher 8 bits and register in lower 8 bits.
*/
u16 addr = ((u16)bank) << 8 | reg;
dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x\n", addr, data);
mutex_lock(&ab8500->lock);
ret = ab8500->write(ab8500, addr, data);
if (ret < 0)
dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
addr, ret);
mutex_unlock(&ab8500->lock);
return ret;
}
static int ab8500_set_register(struct device *dev, u8 bank,
u8 reg, u8 value)
{
int ret;
struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
atomic_inc(&ab8500->transfer_ongoing);
ret = set_register_interruptible(ab8500, bank, reg, value);
atomic_dec(&ab8500->transfer_ongoing);
return ret;
}
static int get_register_interruptible(struct ab8500 *ab8500, u8 bank,
u8 reg, u8 *value)
{
int ret;
u16 addr = ((u16)bank) << 8 | reg;
mutex_lock(&ab8500->lock);
ret = ab8500->read(ab8500, addr);
if (ret < 0)
dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
addr, ret);
else
*value = ret;
mutex_unlock(&ab8500->lock);
dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret);
return (ret < 0) ? ret : 0;
}
static int ab8500_get_register(struct device *dev, u8 bank,
u8 reg, u8 *value)
{
int ret;
struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
atomic_inc(&ab8500->transfer_ongoing);
ret = get_register_interruptible(ab8500, bank, reg, value);
atomic_dec(&ab8500->transfer_ongoing);
return ret;
}
static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank,
u8 reg, u8 bitmask, u8 bitvalues)
{
int ret;
u16 addr = ((u16)bank) << 8 | reg;
mutex_lock(&ab8500->lock);
if (ab8500->write_masked == NULL) {
u8 data;
ret = ab8500->read(ab8500, addr);
if (ret < 0) {
dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
addr, ret);
goto out;
}
data = (u8)ret;
data = (~bitmask & data) | (bitmask & bitvalues);
ret = ab8500->write(ab8500, addr, data);
if (ret < 0)
dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
addr, ret);
dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x\n", addr,
data);
goto out;
}
ret = ab8500->write_masked(ab8500, addr, bitmask, bitvalues);
if (ret < 0)
dev_err(ab8500->dev, "failed to modify reg %#x: %d\n", addr,
ret);
out:
mutex_unlock(&ab8500->lock);
return ret;
}
static int ab8500_mask_and_set_register(struct device *dev,
u8 bank, u8 reg, u8 bitmask, u8 bitvalues)
{
int ret;
struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
atomic_inc(&ab8500->transfer_ongoing);
ret = mask_and_set_register_interruptible(ab8500, bank, reg,
bitmask, bitvalues);
atomic_dec(&ab8500->transfer_ongoing);
return ret;
}
static struct abx500_ops ab8500_ops = {
.get_chip_id = ab8500_get_chip_id,
.get_register = ab8500_get_register,
.set_register = ab8500_set_register,
.get_register_page = NULL,
.set_register_page = NULL,
.mask_and_set_register = ab8500_mask_and_set_register,
.event_registers_startup_state_get = NULL,
.startup_irq_enabled = NULL,
.dump_all_banks = ab8500_dump_all_banks,
};
static void ab8500_irq_lock(struct irq_data *data)
{
struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
mutex_lock(&ab8500->irq_lock);
atomic_inc(&ab8500->transfer_ongoing);
}
static void ab8500_irq_sync_unlock(struct irq_data *data)
{
struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
int i;
for (i = 0; i < ab8500->mask_size; i++) {
u8 old = ab8500->oldmask[i];
u8 new = ab8500->mask[i];
int reg;
if (new == old)
continue;
/*
* Interrupt register 12 doesn't exist prior to AB8500 version
* 2.0
*/
if (ab8500->irq_reg_offset[i] == 11 &&
is_ab8500_1p1_or_earlier(ab8500))
continue;
if (ab8500->irq_reg_offset[i] < 0)
continue;
ab8500->oldmask[i] = new;
reg = AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i];
set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new);
}
atomic_dec(&ab8500->transfer_ongoing);
mutex_unlock(&ab8500->irq_lock);
}
static void ab8500_irq_mask(struct irq_data *data)
{
struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
int offset = data->hwirq;
int index = offset / 8;
int mask = 1 << (offset % 8);
ab8500->mask[index] |= mask;
/* The AB8500 GPIOs have two interrupts each (rising & falling). */
if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R)
ab8500->mask[index + 2] |= mask;
if (offset >= AB9540_INT_GPIO50R && offset <= AB9540_INT_GPIO54R)
ab8500->mask[index + 1] |= mask;
if (offset == AB8540_INT_GPIO43R || offset == AB8540_INT_GPIO44R)
/* Here the falling IRQ is one bit lower */
ab8500->mask[index] |= (mask << 1);
}
static void ab8500_irq_unmask(struct irq_data *data)
{
struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
unsigned int type = irqd_get_trigger_type(data);
int offset = data->hwirq;
int index = offset / 8;
int mask = 1 << (offset % 8);
if (type & IRQ_TYPE_EDGE_RISING)
ab8500->mask[index] &= ~mask;
/* The AB8500 GPIOs have two interrupts each (rising & falling). */
if (type & IRQ_TYPE_EDGE_FALLING) {
if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R)
ab8500->mask[index + 2] &= ~mask;
else if (offset >= AB9540_INT_GPIO50R &&
offset <= AB9540_INT_GPIO54R)
ab8500->mask[index + 1] &= ~mask;
else if (offset == AB8540_INT_GPIO43R ||
offset == AB8540_INT_GPIO44R)
/* Here the falling IRQ is one bit lower */
ab8500->mask[index] &= ~(mask << 1);
else
ab8500->mask[index] &= ~mask;
} else {
/* Satisfies the case where type is not set. */
ab8500->mask[index] &= ~mask;
}
}
static int ab8500_irq_set_type(struct irq_data *data, unsigned int type)
{
return 0;
}
static struct irq_chip ab8500_irq_chip = {
.name = "ab8500",
.irq_bus_lock = ab8500_irq_lock,
.irq_bus_sync_unlock = ab8500_irq_sync_unlock,
.irq_mask = ab8500_irq_mask,
.irq_disable = ab8500_irq_mask,
.irq_unmask = ab8500_irq_unmask,
.irq_set_type = ab8500_irq_set_type,
};
static void update_latch_offset(u8 *offset, int i)
{
/* Fix inconsistent ITFromLatch25 bit mapping... */
if (unlikely(*offset == 17))
*offset = 24;
/* Fix inconsistent ab8540 bit mapping... */
if (unlikely(*offset == 16))
*offset = 25;
if ((i == 3) && (*offset >= 24))
*offset += 2;
}
static int ab8500_handle_hierarchical_line(struct ab8500 *ab8500,
int latch_offset, u8 latch_val)
{
int int_bit, line, i;
for (i = 0; i < ab8500->mask_size; i++)
if (ab8500->irq_reg_offset[i] == latch_offset)
break;
if (i >= ab8500->mask_size) {
dev_err(ab8500->dev, "Register offset 0x%2x not declared\n",
latch_offset);
return -ENXIO;
}
/* ignore masked out interrupts */
latch_val &= ~ab8500->mask[i];
while (latch_val) {
int_bit = __ffs(latch_val);
line = (i << 3) + int_bit;
latch_val &= ~(1 << int_bit);
/*
* This handles the falling edge hwirqs from the GPIO
* lines. Route them back to the line registered for the
* rising IRQ, as this is merely a flag for the same IRQ
* in linux terms.
*/
if (line >= AB8500_INT_GPIO6F && line <= AB8500_INT_GPIO41F)
line -= 16;
if (line >= AB9540_INT_GPIO50F && line <= AB9540_INT_GPIO54F)
line -= 8;
if (line == AB8540_INT_GPIO43F || line == AB8540_INT_GPIO44F)
line += 1;
handle_nested_irq(irq_find_mapping(ab8500->domain, line));
}
return 0;
}
static int ab8500_handle_hierarchical_latch(struct ab8500 *ab8500,
int hier_offset, u8 hier_val)
{
int latch_bit, status;
u8 latch_offset, latch_val;
do {
latch_bit = __ffs(hier_val);
latch_offset = (hier_offset << 3) + latch_bit;
update_latch_offset(&latch_offset, hier_offset);
status = get_register_interruptible(ab8500,
AB8500_INTERRUPT,
AB8500_IT_LATCH1_REG + latch_offset,
&latch_val);
if (status < 0 || latch_val == 0)
goto discard;
status = ab8500_handle_hierarchical_line(ab8500,
latch_offset, latch_val);
if (status < 0)
return status;
discard:
hier_val &= ~(1 << latch_bit);
} while (hier_val);
return 0;
}
static irqreturn_t ab8500_hierarchical_irq(int irq, void *dev)
{
struct ab8500 *ab8500 = dev;
u8 i;
dev_vdbg(ab8500->dev, "interrupt\n");
/* Hierarchical interrupt version */
for (i = 0; i < (ab8500->it_latchhier_num); i++) {
int status;
u8 hier_val;
status = get_register_interruptible(ab8500, AB8500_INTERRUPT,
AB8500_IT_LATCHHIER1_REG + i, &hier_val);
if (status < 0 || hier_val == 0)
continue;
status = ab8500_handle_hierarchical_latch(ab8500, i, hier_val);
if (status < 0)
break;
}
return IRQ_HANDLED;
}
static int ab8500_irq_map(struct irq_domain *d, unsigned int virq,
irq_hw_number_t hwirq)
{
struct ab8500 *ab8500 = d->host_data;
if (!ab8500)
return -EINVAL;
irq_set_chip_data(virq, ab8500);
irq_set_chip_and_handler(virq, &ab8500_irq_chip,
handle_simple_irq);
irq_set_nested_thread(virq, 1);
irq_set_noprobe(virq);
return 0;
}
static const struct irq_domain_ops ab8500_irq_ops = {
.map = ab8500_irq_map,
.xlate = irq_domain_xlate_twocell,
};
static int ab8500_irq_init(struct ab8500 *ab8500, struct device_node *np)
{
int num_irqs;
if (is_ab8540(ab8500))
num_irqs = AB8540_NR_IRQS;
else if (is_ab9540(ab8500))
num_irqs = AB9540_NR_IRQS;
else if (is_ab8505(ab8500))
num_irqs = AB8505_NR_IRQS;
else
num_irqs = AB8500_NR_IRQS;
/* If ->irq_base is zero this will give a linear mapping */
ab8500->domain = irq_domain_add_simple(ab8500->dev->of_node,
num_irqs, 0,
&ab8500_irq_ops, ab8500);
if (!ab8500->domain) {
dev_err(ab8500->dev, "Failed to create irqdomain\n");
return -ENODEV;
}
return 0;
}
int ab8500_suspend(struct ab8500 *ab8500)
{
if (atomic_read(&ab8500->transfer_ongoing))
return -EINVAL;
return 0;
}
static const struct mfd_cell ab8500_bm_devs[] = {
MFD_CELL_OF("ab8500-charger", NULL, NULL, 0, 0,
"stericsson,ab8500-charger"),
MFD_CELL_OF("ab8500-btemp", NULL, NULL, 0, 0,
"stericsson,ab8500-btemp"),
MFD_CELL_OF("ab8500-fg", NULL, NULL, 0, 0,
"stericsson,ab8500-fg"),
MFD_CELL_OF("ab8500-chargalg", NULL, NULL, 0, 0,
"stericsson,ab8500-chargalg"),
};
static const struct mfd_cell ab8500_devs[] = {
MFD_CELL_OF("ab8500-sysctrl",
NULL, NULL, 0, 0, "stericsson,ab8500-sysctrl"),
MFD_CELL_OF("ab8500-ext-regulator",
NULL, NULL, 0, 0, "stericsson,ab8500-ext-regulator"),
MFD_CELL_OF("ab8500-regulator",
NULL, NULL, 0, 0, "stericsson,ab8500-regulator"),
MFD_CELL_OF("ab8500-clk",
NULL, NULL, 0, 0, "stericsson,ab8500-clk"),
MFD_CELL_OF("ab8500-gpadc",
NULL, NULL, 0, 0, "stericsson,ab8500-gpadc"),
MFD_CELL_OF("ab8500-rtc",
NULL, NULL, 0, 0, "stericsson,ab8500-rtc"),
MFD_CELL_OF("ab8500-acc-det",
NULL, NULL, 0, 0, "stericsson,ab8500-acc-det"),
MFD_CELL_OF("ab8500-poweron-key",
NULL, NULL, 0, 0, "stericsson,ab8500-poweron-key"),
MFD_CELL_OF("ab8500-pwm",
NULL, NULL, 0, 1, "stericsson,ab8500-pwm"),
MFD_CELL_OF("ab8500-pwm",
NULL, NULL, 0, 2, "stericsson,ab8500-pwm"),
MFD_CELL_OF("ab8500-pwm",
NULL, NULL, 0, 3, "stericsson,ab8500-pwm"),
MFD_CELL_OF("ab8500-denc",
NULL, NULL, 0, 0, "stericsson,ab8500-denc"),
MFD_CELL_OF("pinctrl-ab8500",
NULL, NULL, 0, 0, "stericsson,ab8500-gpio"),
MFD_CELL_OF("abx500-temp",
NULL, NULL, 0, 0, "stericsson,abx500-temp"),
MFD_CELL_OF("ab8500-usb",
NULL, NULL, 0, 0, "stericsson,ab8500-usb"),
MFD_CELL_OF("ab8500-codec",
NULL, NULL, 0, 0, "stericsson,ab8500-codec"),
};
static const struct mfd_cell ab9540_devs[] = {
{
.name = "ab8500-sysctrl",
},
{
.name = "ab8500-ext-regulator",
},
{
.name = "ab8500-regulator",
},
{
.name = "abx500-clk",
.of_compatible = "stericsson,abx500-clk",
},
{
.name = "ab8500-gpadc",
.of_compatible = "stericsson,ab8500-gpadc",
},
{
.name = "ab8500-rtc",
},
{
.name = "ab8500-acc-det",
},
{
.name = "ab8500-poweron-key",
},
{
.name = "ab8500-pwm",
.id = 1,
},
{
.name = "abx500-temp",
},
{
.name = "pinctrl-ab9540",
.of_compatible = "stericsson,ab9540-gpio",
},
{
.name = "ab9540-usb",
},
{
.name = "ab9540-codec",
},
{
.name = "ab-iddet",
},
};
/* Device list for ab8505 */
static const struct mfd_cell ab8505_devs[] = {
{
.name = "ab8500-sysctrl",
.of_compatible = "stericsson,ab8500-sysctrl",
},
{
.name = "ab8500-regulator",
.of_compatible = "stericsson,ab8505-regulator",
},
{
.name = "abx500-clk",
.of_compatible = "stericsson,ab8500-clk",
},
{
.name = "ab8500-gpadc",
.of_compatible = "stericsson,ab8500-gpadc",
},
{
.name = "ab8500-rtc",
.of_compatible = "stericsson,ab8500-rtc",
},
{
.name = "ab8500-acc-det",
.of_compatible = "stericsson,ab8500-acc-det",
},
{
.name = "ab8500-poweron-key",
.of_compatible = "stericsson,ab8500-poweron-key",
},
{
.name = "ab8500-pwm",
.of_compatible = "stericsson,ab8500-pwm",
.id = 1,
},
{
.name = "pinctrl-ab8505",
.of_compatible = "stericsson,ab8505-gpio",
},
{
.name = "ab8500-usb",
.of_compatible = "stericsson,ab8500-usb",
},
{
.name = "ab8500-codec",
.of_compatible = "stericsson,ab8500-codec",
},
{
.name = "ab-iddet",
},
};
static const struct mfd_cell ab8540_devs[] = {
{
.name = "ab8500-sysctrl",
},
{
.name = "ab8500-ext-regulator",
},
{
.name = "ab8500-regulator",
},
{
.name = "abx500-clk",
.of_compatible = "stericsson,abx500-clk",
},
{
.name = "ab8500-gpadc",
.of_compatible = "stericsson,ab8500-gpadc",
},
{
.name = "ab8500-acc-det",
},
{
.name = "ab8500-poweron-key",
},
{
.name = "ab8500-pwm",
.id = 1,
},
{
.name = "abx500-temp",
},
{
.name = "pinctrl-ab8540",
},
{
.name = "ab8540-usb",
},
{
.name = "ab8540-codec",
},
{
.name = "ab-iddet",
},
};
static const struct mfd_cell ab8540_cut1_devs[] = {
{
.name = "ab8500-rtc",
.of_compatible = "stericsson,ab8500-rtc",
},
};
static const struct mfd_cell ab8540_cut2_devs[] = {
{
.name = "ab8540-rtc",
.of_compatible = "stericsson,ab8540-rtc",
},
};
static ssize_t chip_id_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ab8500 *ab8500;
ab8500 = dev_get_drvdata(dev);
return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);
}
/*
* ab8500 has switched off due to (SWITCH_OFF_STATUS):
* 0x01 Swoff bit programming
* 0x02 Thermal protection activation
* 0x04 Vbat lower then BattOk falling threshold
* 0x08 Watchdog expired
* 0x10 Non presence of 32kHz clock
* 0x20 Battery level lower than power on reset threshold
* 0x40 Power on key 1 pressed longer than 10 seconds
* 0x80 DB8500 thermal shutdown
*/
static ssize_t switch_off_status_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int ret;
u8 value;
struct ab8500 *ab8500;
ab8500 = dev_get_drvdata(dev);
ret = get_register_interruptible(ab8500, AB8500_RTC,
AB8500_SWITCH_OFF_STATUS, &value);
if (ret < 0)
return ret;
return sprintf(buf, "%#x\n", value);
}
/* use mask and set to override the register turn_on_stat value */
void ab8500_override_turn_on_stat(u8 mask, u8 set)
{
spin_lock(&on_stat_lock);
turn_on_stat_mask = mask;
turn_on_stat_set = set;
spin_unlock(&on_stat_lock);
}
/*
* ab8500 has turned on due to (TURN_ON_STATUS):
* 0x01 PORnVbat
* 0x02 PonKey1dbF
* 0x04 PonKey2dbF
* 0x08 RTCAlarm
* 0x10 MainChDet
* 0x20 VbusDet
* 0x40 UsbIDDetect
* 0x80 Reserved
*/
static ssize_t turn_on_status_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int ret;
u8 value;
struct ab8500 *ab8500;
ab8500 = dev_get_drvdata(dev);
ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
AB8500_TURN_ON_STATUS, &value);
if (ret < 0)
return ret;
/*
* In L9540, turn_on_status register is not updated correctly if
* the device is rebooted with AC/USB charger connected. Due to
* this, the device boots android instead of entering into charge
* only mode. Read the AC/USB status register to detect the charger
* presence and update the turn on status manually.
*/
if (is_ab9540(ab8500)) {
spin_lock(&on_stat_lock);
value = (value & turn_on_stat_mask) | turn_on_stat_set;
spin_unlock(&on_stat_lock);
}
return sprintf(buf, "%#x\n", value);
}
static ssize_t turn_on_status_2_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int ret;
u8 value;
struct ab8500 *ab8500;
ab8500 = dev_get_drvdata(dev);
ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
AB8505_TURN_ON_STATUS_2, &value);
if (ret < 0)
return ret;
return sprintf(buf, "%#x\n", (value & 0x1));
}
static ssize_t dbbrstn_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ab8500 *ab8500;
int ret;
u8 value;
ab8500 = dev_get_drvdata(dev);
ret = get_register_interruptible(ab8500, AB8500_REGU_CTRL2,
AB9540_MODEM_CTRL2_REG, &value);
if (ret < 0)
return ret;
return sprintf(buf, "%d\n",
(value & AB9540_MODEM_CTRL2_SWDBBRSTN_BIT) ? 1 : 0);
}
static ssize_t dbbrstn_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct ab8500 *ab8500;
int ret = count;
int err;
u8 bitvalues;
ab8500 = dev_get_drvdata(dev);
if (count > 0) {
switch (buf[0]) {
case '0':
bitvalues = 0;
break;
case '1':
bitvalues = AB9540_MODEM_CTRL2_SWDBBRSTN_BIT;
break;
default:
goto exit;
}
err = mask_and_set_register_interruptible(ab8500,
AB8500_REGU_CTRL2, AB9540_MODEM_CTRL2_REG,
AB9540_MODEM_CTRL2_SWDBBRSTN_BIT, bitvalues);
if (err)
dev_info(ab8500->dev,
"Failed to set DBBRSTN %c, err %#x\n",
buf[0], err);
}
exit:
return ret;
}
static DEVICE_ATTR_RO(chip_id);
static DEVICE_ATTR_RO(switch_off_status);
static DEVICE_ATTR_RO(turn_on_status);
static DEVICE_ATTR_RO(turn_on_status_2);
static DEVICE_ATTR_RW(dbbrstn);
static struct attribute *ab8500_sysfs_entries[] = {
&dev_attr_chip_id.attr,
&dev_attr_switch_off_status.attr,
&dev_attr_turn_on_status.attr,
NULL,
};
static struct attribute *ab8505_sysfs_entries[] = {
&dev_attr_turn_on_status_2.attr,
NULL,
};
static struct attribute *ab9540_sysfs_entries[] = {
&dev_attr_chip_id.attr,
&dev_attr_switch_off_status.attr,
&dev_attr_turn_on_status.attr,
&dev_attr_dbbrstn.attr,
NULL,
};
static const struct attribute_group ab8500_attr_group = {
.attrs = ab8500_sysfs_entries,
};
static const struct attribute_group ab8505_attr_group = {
.attrs = ab8505_sysfs_entries,
};
static const struct attribute_group ab9540_attr_group = {
.attrs = ab9540_sysfs_entries,
};
static int ab8500_probe(struct platform_device *pdev)
{
static const char * const switch_off_status[] = {
"Swoff bit programming",
"Thermal protection activation",
"Vbat lower then BattOk falling threshold",
"Watchdog expired",
"Non presence of 32kHz clock",
"Battery level lower than power on reset threshold",
"Power on key 1 pressed longer than 10 seconds",
"DB8500 thermal shutdown"};
static const char * const turn_on_status[] = {
"Battery rising (Vbat)",
"Power On Key 1 dbF",
"Power On Key 2 dbF",
"RTC Alarm",
"Main Charger Detect",
"Vbus Detect (USB)",
"USB ID Detect",
"UART Factory Mode Detect"};
const struct platform_device_id *platid = platform_get_device_id(pdev);
enum ab8500_version version = AB8500_VERSION_UNDEFINED;
struct device_node *np = pdev->dev.of_node;
struct ab8500 *ab8500;
int ret;
int i;
int irq;
u8 value;
ab8500 = devm_kzalloc(&pdev->dev, sizeof(*ab8500), GFP_KERNEL);
if (!ab8500)
return -ENOMEM;
ab8500->dev = &pdev->dev;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
ab8500->irq = irq;
ab8500->read = ab8500_prcmu_read;
ab8500->write = ab8500_prcmu_write;
ab8500->write_masked = ab8500_prcmu_write_masked;
mutex_init(&ab8500->lock);
mutex_init(&ab8500->irq_lock);
atomic_set(&ab8500->transfer_ongoing, 0);
platform_set_drvdata(pdev, ab8500);
if (platid)
version = platid->driver_data;
if (version != AB8500_VERSION_UNDEFINED)
ab8500->version = version;
else {
ret = get_register_interruptible(ab8500, AB8500_MISC,
AB8500_IC_NAME_REG, &value);
if (ret < 0) {
dev_err(&pdev->dev, "could not probe HW\n");
return ret;
}
ab8500->version = value;
}
ret = get_register_interruptible(ab8500, AB8500_MISC,
AB8500_REV_REG, &value);
if (ret < 0)
return ret;
ab8500->chip_id = value;
dev_info(ab8500->dev, "detected chip, %s rev. %1x.%1x\n",
ab8500_version_str[ab8500->version],
ab8500->chip_id >> 4,
ab8500->chip_id & 0x0F);
/* Configure AB8540 */
if (is_ab8540(ab8500)) {
ab8500->mask_size = AB8540_NUM_IRQ_REGS;
ab8500->irq_reg_offset = ab8540_irq_regoffset;
ab8500->it_latchhier_num = AB8540_IT_LATCHHIER_NUM;
} /* Configure AB8500 or AB9540 IRQ */
else if (is_ab9540(ab8500) || is_ab8505(ab8500)) {
ab8500->mask_size = AB9540_NUM_IRQ_REGS;
ab8500->irq_reg_offset = ab9540_irq_regoffset;
ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
} else {
ab8500->mask_size = AB8500_NUM_IRQ_REGS;
ab8500->irq_reg_offset = ab8500_irq_regoffset;
ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
}
ab8500->mask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
GFP_KERNEL);
if (!ab8500->mask)
return -ENOMEM;
ab8500->oldmask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
GFP_KERNEL);
if (!ab8500->oldmask)
return -ENOMEM;
/*
* ab8500 has switched off due to (SWITCH_OFF_STATUS):
* 0x01 Swoff bit programming
* 0x02 Thermal protection activation
* 0x04 Vbat lower then BattOk falling threshold
* 0x08 Watchdog expired
* 0x10 Non presence of 32kHz clock
* 0x20 Battery level lower than power on reset threshold
* 0x40 Power on key 1 pressed longer than 10 seconds
* 0x80 DB8500 thermal shutdown
*/
ret = get_register_interruptible(ab8500, AB8500_RTC,
AB8500_SWITCH_OFF_STATUS, &value);
if (ret < 0)
return ret;
dev_info(ab8500->dev, "switch off cause(s) (%#x): ", value);
if (value) {
for (i = 0; i < ARRAY_SIZE(switch_off_status); i++) {
if (value & 1)
pr_cont(" \"%s\"", switch_off_status[i]);
value = value >> 1;
}
pr_cont("\n");
} else {
pr_cont(" None\n");
}
ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
AB8500_TURN_ON_STATUS, &value);
if (ret < 0)
return ret;
dev_info(ab8500->dev, "turn on reason(s) (%#x): ", value);
if (value) {
for (i = 0; i < ARRAY_SIZE(turn_on_status); i++) {
if (value & 1)
pr_cont("\"%s\" ", turn_on_status[i]);
value = value >> 1;
}
pr_cont("\n");
} else {
pr_cont("None\n");
}
if (is_ab9540(ab8500)) {
ret = get_register_interruptible(ab8500, AB8500_CHARGER,
AB8500_CH_USBCH_STAT1_REG, &value);
if (ret < 0)
return ret;
if ((value & VBUS_DET_DBNC1) && (value & VBUS_DET_DBNC100))
ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON,
AB8500_VBUS_DET);
}
/* Clear and mask all interrupts */
for (i = 0; i < ab8500->mask_size; i++) {
/*
* Interrupt register 12 doesn't exist prior to AB8500 version
* 2.0
*/
if (ab8500->irq_reg_offset[i] == 11 &&
is_ab8500_1p1_or_earlier(ab8500))
continue;
if (ab8500->irq_reg_offset[i] < 0)
continue;
get_register_interruptible(ab8500, AB8500_INTERRUPT,
AB8500_IT_LATCH1_REG + ab8500->irq_reg_offset[i],
&value);
set_register_interruptible(ab8500, AB8500_INTERRUPT,
AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i], 0xff);
}
ret = abx500_register_ops(ab8500->dev, &ab8500_ops);
if (ret)
return ret;
for (i = 0; i < ab8500->mask_size; i++)
ab8500->mask[i] = ab8500->oldmask[i] = 0xff;
ret = ab8500_irq_init(ab8500, np);
if (ret)
return ret;
ret = devm_request_threaded_irq(&pdev->dev, ab8500->irq, NULL,
ab8500_hierarchical_irq,
IRQF_ONESHOT | IRQF_NO_SUSPEND,
"ab8500", ab8500);
if (ret)
return ret;
if (is_ab9540(ab8500))
ret = mfd_add_devices(ab8500->dev, 0, ab9540_devs,
ARRAY_SIZE(ab9540_devs), NULL,
0, ab8500->domain);
else if (is_ab8540(ab8500)) {
ret = mfd_add_devices(ab8500->dev, 0, ab8540_devs,
ARRAY_SIZE(ab8540_devs), NULL,
0, ab8500->domain);
if (ret)
return ret;
if (is_ab8540_1p2_or_earlier(ab8500))
ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut1_devs,
ARRAY_SIZE(ab8540_cut1_devs), NULL,
0, ab8500->domain);
else /* ab8540 >= cut2 */
ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut2_devs,
ARRAY_SIZE(ab8540_cut2_devs), NULL,
0, ab8500->domain);
} else if (is_ab8505(ab8500))
ret = mfd_add_devices(ab8500->dev, 0, ab8505_devs,
ARRAY_SIZE(ab8505_devs), NULL,
0, ab8500->domain);
else
ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs,
ARRAY_SIZE(ab8500_devs), NULL,
0, ab8500->domain);
if (ret)
return ret;
/* Add battery management devices */
ret = mfd_add_devices(ab8500->dev, 0, ab8500_bm_devs,
ARRAY_SIZE(ab8500_bm_devs), NULL,
0, ab8500->domain);
if (ret)
dev_err(ab8500->dev, "error adding bm devices\n");
if (((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
ab8500->chip_id >= AB8500_CUT2P0) || is_ab8540(ab8500))
ret = sysfs_create_group(&ab8500->dev->kobj,
&ab9540_attr_group);
else
ret = sysfs_create_group(&ab8500->dev->kobj,
&ab8500_attr_group);
if ((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
ab8500->chip_id >= AB8500_CUT2P0)
ret = sysfs_create_group(&ab8500->dev->kobj,
&ab8505_attr_group);
if (ret)
dev_err(ab8500->dev, "error creating sysfs entries\n");
return ret;
}
static const struct platform_device_id ab8500_id[] = {
{ "ab8500-core", AB8500_VERSION_AB8500 },
{ "ab8505-core", AB8500_VERSION_AB8505 },
{ "ab9540-i2c", AB8500_VERSION_AB9540 },
{ "ab8540-i2c", AB8500_VERSION_AB8540 },
{ }
};
static struct platform_driver ab8500_core_driver = {
.driver = {
.name = "ab8500-core",
.suppress_bind_attrs = true,
},
.probe = ab8500_probe,
.id_table = ab8500_id,
};
static int __init ab8500_core_init(void)
{
return platform_driver_register(&ab8500_core_driver);
}
core_initcall(ab8500_core_init);
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