forked from Minki/linux
fc1882dcb5
The STMPE platform data is only populated from the device tree in all existing users, so push the struct and make the OF case the norm. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
1354 lines
32 KiB
C
1354 lines
32 KiB
C
/*
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* ST Microelectronics MFD: stmpe's driver
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*
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* Copyright (C) ST-Ericsson SA 2010
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*
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* License Terms: GNU General Public License, version 2
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* Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
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*/
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#include <linux/err.h>
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#include <linux/gpio.h>
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#include <linux/export.h>
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/irqdomain.h>
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#include <linux/pm.h>
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#include <linux/slab.h>
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#include <linux/mfd/core.h>
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#include <linux/delay.h>
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#include <linux/regulator/consumer.h>
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#include "stmpe.h"
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/**
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* struct stmpe_platform_data - STMPE platform data
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* @id: device id to distinguish between multiple STMPEs on the same board
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* @blocks: bitmask of blocks to enable (use STMPE_BLOCK_*)
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* @irq_trigger: IRQ trigger to use for the interrupt to the host
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* @autosleep: bool to enable/disable stmpe autosleep
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* @autosleep_timeout: inactivity timeout in milliseconds for autosleep
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* @irq_over_gpio: true if gpio is used to get irq
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* @irq_gpio: gpio number over which irq will be requested (significant only if
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* irq_over_gpio is true)
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*/
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struct stmpe_platform_data {
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int id;
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unsigned int blocks;
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unsigned int irq_trigger;
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bool autosleep;
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bool irq_over_gpio;
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int irq_gpio;
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int autosleep_timeout;
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};
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static int __stmpe_enable(struct stmpe *stmpe, unsigned int blocks)
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{
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return stmpe->variant->enable(stmpe, blocks, true);
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}
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static int __stmpe_disable(struct stmpe *stmpe, unsigned int blocks)
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{
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return stmpe->variant->enable(stmpe, blocks, false);
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}
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static int __stmpe_reg_read(struct stmpe *stmpe, u8 reg)
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{
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int ret;
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ret = stmpe->ci->read_byte(stmpe, reg);
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if (ret < 0)
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dev_err(stmpe->dev, "failed to read reg %#x: %d\n", reg, ret);
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dev_vdbg(stmpe->dev, "rd: reg %#x => data %#x\n", reg, ret);
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return ret;
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}
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static int __stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val)
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{
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int ret;
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dev_vdbg(stmpe->dev, "wr: reg %#x <= %#x\n", reg, val);
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ret = stmpe->ci->write_byte(stmpe, reg, val);
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if (ret < 0)
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dev_err(stmpe->dev, "failed to write reg %#x: %d\n", reg, ret);
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return ret;
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}
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static int __stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val)
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{
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int ret;
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ret = __stmpe_reg_read(stmpe, reg);
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if (ret < 0)
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return ret;
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ret &= ~mask;
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ret |= val;
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return __stmpe_reg_write(stmpe, reg, ret);
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}
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static int __stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length,
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u8 *values)
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{
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int ret;
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ret = stmpe->ci->read_block(stmpe, reg, length, values);
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if (ret < 0)
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dev_err(stmpe->dev, "failed to read regs %#x: %d\n", reg, ret);
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dev_vdbg(stmpe->dev, "rd: reg %#x (%d) => ret %#x\n", reg, length, ret);
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stmpe_dump_bytes("stmpe rd: ", values, length);
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return ret;
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}
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static int __stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
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const u8 *values)
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{
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int ret;
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dev_vdbg(stmpe->dev, "wr: regs %#x (%d)\n", reg, length);
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stmpe_dump_bytes("stmpe wr: ", values, length);
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ret = stmpe->ci->write_block(stmpe, reg, length, values);
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if (ret < 0)
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dev_err(stmpe->dev, "failed to write regs %#x: %d\n", reg, ret);
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return ret;
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}
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/**
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* stmpe_enable - enable blocks on an STMPE device
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* @stmpe: Device to work on
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* @blocks: Mask of blocks (enum stmpe_block values) to enable
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*/
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int stmpe_enable(struct stmpe *stmpe, unsigned int blocks)
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{
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int ret;
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mutex_lock(&stmpe->lock);
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ret = __stmpe_enable(stmpe, blocks);
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mutex_unlock(&stmpe->lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(stmpe_enable);
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/**
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* stmpe_disable - disable blocks on an STMPE device
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* @stmpe: Device to work on
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* @blocks: Mask of blocks (enum stmpe_block values) to enable
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*/
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int stmpe_disable(struct stmpe *stmpe, unsigned int blocks)
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{
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int ret;
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mutex_lock(&stmpe->lock);
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ret = __stmpe_disable(stmpe, blocks);
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mutex_unlock(&stmpe->lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(stmpe_disable);
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/**
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* stmpe_reg_read() - read a single STMPE register
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* @stmpe: Device to read from
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* @reg: Register to read
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*/
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int stmpe_reg_read(struct stmpe *stmpe, u8 reg)
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{
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int ret;
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mutex_lock(&stmpe->lock);
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ret = __stmpe_reg_read(stmpe, reg);
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mutex_unlock(&stmpe->lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(stmpe_reg_read);
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/**
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* stmpe_reg_write() - write a single STMPE register
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* @stmpe: Device to write to
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* @reg: Register to write
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* @val: Value to write
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*/
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int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val)
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{
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int ret;
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mutex_lock(&stmpe->lock);
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ret = __stmpe_reg_write(stmpe, reg, val);
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mutex_unlock(&stmpe->lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(stmpe_reg_write);
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/**
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* stmpe_set_bits() - set the value of a bitfield in a STMPE register
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* @stmpe: Device to write to
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* @reg: Register to write
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* @mask: Mask of bits to set
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* @val: Value to set
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*/
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int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val)
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{
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int ret;
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mutex_lock(&stmpe->lock);
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ret = __stmpe_set_bits(stmpe, reg, mask, val);
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mutex_unlock(&stmpe->lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(stmpe_set_bits);
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/**
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* stmpe_block_read() - read multiple STMPE registers
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* @stmpe: Device to read from
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* @reg: First register
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* @length: Number of registers
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* @values: Buffer to write to
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*/
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int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values)
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{
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int ret;
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mutex_lock(&stmpe->lock);
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ret = __stmpe_block_read(stmpe, reg, length, values);
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mutex_unlock(&stmpe->lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(stmpe_block_read);
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/**
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* stmpe_block_write() - write multiple STMPE registers
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* @stmpe: Device to write to
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* @reg: First register
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* @length: Number of registers
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* @values: Values to write
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*/
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int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
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const u8 *values)
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{
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int ret;
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mutex_lock(&stmpe->lock);
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ret = __stmpe_block_write(stmpe, reg, length, values);
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mutex_unlock(&stmpe->lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(stmpe_block_write);
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/**
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* stmpe_set_altfunc()- set the alternate function for STMPE pins
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* @stmpe: Device to configure
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* @pins: Bitmask of pins to affect
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* @block: block to enable alternate functions for
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*
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* @pins is assumed to have a bit set for each of the bits whose alternate
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* function is to be changed, numbered according to the GPIOXY numbers.
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*
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* If the GPIO module is not enabled, this function automatically enables it in
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* order to perform the change.
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*/
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int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins, enum stmpe_block block)
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{
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struct stmpe_variant_info *variant = stmpe->variant;
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u8 regaddr = stmpe->regs[STMPE_IDX_GPAFR_U_MSB];
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int af_bits = variant->af_bits;
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int numregs = DIV_ROUND_UP(stmpe->num_gpios * af_bits, 8);
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int mask = (1 << af_bits) - 1;
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u8 regs[8];
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int af, afperreg, ret;
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if (!variant->get_altfunc)
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return 0;
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afperreg = 8 / af_bits;
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mutex_lock(&stmpe->lock);
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ret = __stmpe_enable(stmpe, STMPE_BLOCK_GPIO);
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if (ret < 0)
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goto out;
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ret = __stmpe_block_read(stmpe, regaddr, numregs, regs);
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if (ret < 0)
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goto out;
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af = variant->get_altfunc(stmpe, block);
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while (pins) {
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int pin = __ffs(pins);
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int regoffset = numregs - (pin / afperreg) - 1;
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int pos = (pin % afperreg) * (8 / afperreg);
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regs[regoffset] &= ~(mask << pos);
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regs[regoffset] |= af << pos;
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pins &= ~(1 << pin);
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}
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ret = __stmpe_block_write(stmpe, regaddr, numregs, regs);
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out:
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mutex_unlock(&stmpe->lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(stmpe_set_altfunc);
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/*
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* GPIO (all variants)
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*/
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static struct resource stmpe_gpio_resources[] = {
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/* Start and end filled dynamically */
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{
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.flags = IORESOURCE_IRQ,
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},
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};
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static const struct mfd_cell stmpe_gpio_cell = {
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.name = "stmpe-gpio",
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.of_compatible = "st,stmpe-gpio",
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.resources = stmpe_gpio_resources,
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.num_resources = ARRAY_SIZE(stmpe_gpio_resources),
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};
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static const struct mfd_cell stmpe_gpio_cell_noirq = {
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.name = "stmpe-gpio",
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.of_compatible = "st,stmpe-gpio",
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/* gpio cell resources consist of an irq only so no resources here */
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};
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/*
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* Keypad (1601, 2401, 2403)
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*/
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static struct resource stmpe_keypad_resources[] = {
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{
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.name = "KEYPAD",
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.flags = IORESOURCE_IRQ,
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},
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{
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.name = "KEYPAD_OVER",
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.flags = IORESOURCE_IRQ,
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},
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};
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static const struct mfd_cell stmpe_keypad_cell = {
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.name = "stmpe-keypad",
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.of_compatible = "st,stmpe-keypad",
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.resources = stmpe_keypad_resources,
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.num_resources = ARRAY_SIZE(stmpe_keypad_resources),
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};
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/*
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* PWM (1601, 2401, 2403)
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*/
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static struct resource stmpe_pwm_resources[] = {
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{
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.name = "PWM0",
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.flags = IORESOURCE_IRQ,
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},
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{
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.name = "PWM1",
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.flags = IORESOURCE_IRQ,
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},
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{
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.name = "PWM2",
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.flags = IORESOURCE_IRQ,
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},
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};
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static const struct mfd_cell stmpe_pwm_cell = {
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.name = "stmpe-pwm",
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.of_compatible = "st,stmpe-pwm",
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.resources = stmpe_pwm_resources,
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.num_resources = ARRAY_SIZE(stmpe_pwm_resources),
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};
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/*
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* STMPE801
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*/
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static const u8 stmpe801_regs[] = {
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[STMPE_IDX_CHIP_ID] = STMPE801_REG_CHIP_ID,
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[STMPE_IDX_ICR_LSB] = STMPE801_REG_SYS_CTRL,
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[STMPE_IDX_GPMR_LSB] = STMPE801_REG_GPIO_MP_STA,
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[STMPE_IDX_GPSR_LSB] = STMPE801_REG_GPIO_SET_PIN,
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[STMPE_IDX_GPCR_LSB] = STMPE801_REG_GPIO_SET_PIN,
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[STMPE_IDX_GPDR_LSB] = STMPE801_REG_GPIO_DIR,
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[STMPE_IDX_IEGPIOR_LSB] = STMPE801_REG_GPIO_INT_EN,
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[STMPE_IDX_ISGPIOR_MSB] = STMPE801_REG_GPIO_INT_STA,
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};
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static struct stmpe_variant_block stmpe801_blocks[] = {
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{
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.cell = &stmpe_gpio_cell,
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.irq = 0,
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.block = STMPE_BLOCK_GPIO,
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},
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};
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static struct stmpe_variant_block stmpe801_blocks_noirq[] = {
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{
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.cell = &stmpe_gpio_cell_noirq,
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.block = STMPE_BLOCK_GPIO,
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},
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};
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static int stmpe801_enable(struct stmpe *stmpe, unsigned int blocks,
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bool enable)
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{
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if (blocks & STMPE_BLOCK_GPIO)
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return 0;
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else
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return -EINVAL;
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}
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static struct stmpe_variant_info stmpe801 = {
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.name = "stmpe801",
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.id_val = STMPE801_ID,
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.id_mask = 0xffff,
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.num_gpios = 8,
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.regs = stmpe801_regs,
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.blocks = stmpe801_blocks,
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.num_blocks = ARRAY_SIZE(stmpe801_blocks),
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.num_irqs = STMPE801_NR_INTERNAL_IRQS,
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.enable = stmpe801_enable,
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};
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static struct stmpe_variant_info stmpe801_noirq = {
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.name = "stmpe801",
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.id_val = STMPE801_ID,
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.id_mask = 0xffff,
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.num_gpios = 8,
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.regs = stmpe801_regs,
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.blocks = stmpe801_blocks_noirq,
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.num_blocks = ARRAY_SIZE(stmpe801_blocks_noirq),
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.enable = stmpe801_enable,
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};
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/*
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* Touchscreen (STMPE811 or STMPE610)
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*/
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static struct resource stmpe_ts_resources[] = {
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{
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.name = "TOUCH_DET",
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.flags = IORESOURCE_IRQ,
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},
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{
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.name = "FIFO_TH",
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.flags = IORESOURCE_IRQ,
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},
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};
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static const struct mfd_cell stmpe_ts_cell = {
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.name = "stmpe-ts",
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.of_compatible = "st,stmpe-ts",
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.resources = stmpe_ts_resources,
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.num_resources = ARRAY_SIZE(stmpe_ts_resources),
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};
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/*
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* STMPE811 or STMPE610
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*/
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static const u8 stmpe811_regs[] = {
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[STMPE_IDX_CHIP_ID] = STMPE811_REG_CHIP_ID,
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[STMPE_IDX_ICR_LSB] = STMPE811_REG_INT_CTRL,
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[STMPE_IDX_IER_LSB] = STMPE811_REG_INT_EN,
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[STMPE_IDX_ISR_MSB] = STMPE811_REG_INT_STA,
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[STMPE_IDX_GPMR_LSB] = STMPE811_REG_GPIO_MP_STA,
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[STMPE_IDX_GPSR_LSB] = STMPE811_REG_GPIO_SET_PIN,
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[STMPE_IDX_GPCR_LSB] = STMPE811_REG_GPIO_CLR_PIN,
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[STMPE_IDX_GPDR_LSB] = STMPE811_REG_GPIO_DIR,
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[STMPE_IDX_GPRER_LSB] = STMPE811_REG_GPIO_RE,
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[STMPE_IDX_GPFER_LSB] = STMPE811_REG_GPIO_FE,
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[STMPE_IDX_GPAFR_U_MSB] = STMPE811_REG_GPIO_AF,
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[STMPE_IDX_IEGPIOR_LSB] = STMPE811_REG_GPIO_INT_EN,
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[STMPE_IDX_ISGPIOR_MSB] = STMPE811_REG_GPIO_INT_STA,
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[STMPE_IDX_GPEDR_MSB] = STMPE811_REG_GPIO_ED,
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};
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static struct stmpe_variant_block stmpe811_blocks[] = {
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{
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.cell = &stmpe_gpio_cell,
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.irq = STMPE811_IRQ_GPIOC,
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.block = STMPE_BLOCK_GPIO,
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},
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{
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.cell = &stmpe_ts_cell,
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.irq = STMPE811_IRQ_TOUCH_DET,
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.block = STMPE_BLOCK_TOUCHSCREEN,
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},
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};
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|
|
static int stmpe811_enable(struct stmpe *stmpe, unsigned int blocks,
|
|
bool enable)
|
|
{
|
|
unsigned int mask = 0;
|
|
|
|
if (blocks & STMPE_BLOCK_GPIO)
|
|
mask |= STMPE811_SYS_CTRL2_GPIO_OFF;
|
|
|
|
if (blocks & STMPE_BLOCK_ADC)
|
|
mask |= STMPE811_SYS_CTRL2_ADC_OFF;
|
|
|
|
if (blocks & STMPE_BLOCK_TOUCHSCREEN)
|
|
mask |= STMPE811_SYS_CTRL2_TSC_OFF;
|
|
|
|
return __stmpe_set_bits(stmpe, STMPE811_REG_SYS_CTRL2, mask,
|
|
enable ? 0 : mask);
|
|
}
|
|
|
|
static int stmpe811_get_altfunc(struct stmpe *stmpe, enum stmpe_block block)
|
|
{
|
|
/* 0 for touchscreen, 1 for GPIO */
|
|
return block != STMPE_BLOCK_TOUCHSCREEN;
|
|
}
|
|
|
|
static struct stmpe_variant_info stmpe811 = {
|
|
.name = "stmpe811",
|
|
.id_val = 0x0811,
|
|
.id_mask = 0xffff,
|
|
.num_gpios = 8,
|
|
.af_bits = 1,
|
|
.regs = stmpe811_regs,
|
|
.blocks = stmpe811_blocks,
|
|
.num_blocks = ARRAY_SIZE(stmpe811_blocks),
|
|
.num_irqs = STMPE811_NR_INTERNAL_IRQS,
|
|
.enable = stmpe811_enable,
|
|
.get_altfunc = stmpe811_get_altfunc,
|
|
};
|
|
|
|
/* Similar to 811, except number of gpios */
|
|
static struct stmpe_variant_info stmpe610 = {
|
|
.name = "stmpe610",
|
|
.id_val = 0x0811,
|
|
.id_mask = 0xffff,
|
|
.num_gpios = 6,
|
|
.af_bits = 1,
|
|
.regs = stmpe811_regs,
|
|
.blocks = stmpe811_blocks,
|
|
.num_blocks = ARRAY_SIZE(stmpe811_blocks),
|
|
.num_irqs = STMPE811_NR_INTERNAL_IRQS,
|
|
.enable = stmpe811_enable,
|
|
.get_altfunc = stmpe811_get_altfunc,
|
|
};
|
|
|
|
/*
|
|
* STMPE1601
|
|
*/
|
|
|
|
static const u8 stmpe1601_regs[] = {
|
|
[STMPE_IDX_CHIP_ID] = STMPE1601_REG_CHIP_ID,
|
|
[STMPE_IDX_ICR_LSB] = STMPE1601_REG_ICR_LSB,
|
|
[STMPE_IDX_IER_LSB] = STMPE1601_REG_IER_LSB,
|
|
[STMPE_IDX_ISR_MSB] = STMPE1601_REG_ISR_MSB,
|
|
[STMPE_IDX_GPMR_LSB] = STMPE1601_REG_GPIO_MP_LSB,
|
|
[STMPE_IDX_GPSR_LSB] = STMPE1601_REG_GPIO_SET_LSB,
|
|
[STMPE_IDX_GPCR_LSB] = STMPE1601_REG_GPIO_CLR_LSB,
|
|
[STMPE_IDX_GPDR_LSB] = STMPE1601_REG_GPIO_SET_DIR_LSB,
|
|
[STMPE_IDX_GPRER_LSB] = STMPE1601_REG_GPIO_RE_LSB,
|
|
[STMPE_IDX_GPFER_LSB] = STMPE1601_REG_GPIO_FE_LSB,
|
|
[STMPE_IDX_GPPUR_LSB] = STMPE1601_REG_GPIO_PU_LSB,
|
|
[STMPE_IDX_GPAFR_U_MSB] = STMPE1601_REG_GPIO_AF_U_MSB,
|
|
[STMPE_IDX_IEGPIOR_LSB] = STMPE1601_REG_INT_EN_GPIO_MASK_LSB,
|
|
[STMPE_IDX_ISGPIOR_MSB] = STMPE1601_REG_INT_STA_GPIO_MSB,
|
|
[STMPE_IDX_GPEDR_MSB] = STMPE1601_REG_GPIO_ED_MSB,
|
|
};
|
|
|
|
static struct stmpe_variant_block stmpe1601_blocks[] = {
|
|
{
|
|
.cell = &stmpe_gpio_cell,
|
|
.irq = STMPE1601_IRQ_GPIOC,
|
|
.block = STMPE_BLOCK_GPIO,
|
|
},
|
|
{
|
|
.cell = &stmpe_keypad_cell,
|
|
.irq = STMPE1601_IRQ_KEYPAD,
|
|
.block = STMPE_BLOCK_KEYPAD,
|
|
},
|
|
{
|
|
.cell = &stmpe_pwm_cell,
|
|
.irq = STMPE1601_IRQ_PWM0,
|
|
.block = STMPE_BLOCK_PWM,
|
|
},
|
|
};
|
|
|
|
/* supported autosleep timeout delay (in msecs) */
|
|
static const int stmpe_autosleep_delay[] = {
|
|
4, 16, 32, 64, 128, 256, 512, 1024,
|
|
};
|
|
|
|
static int stmpe_round_timeout(int timeout)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(stmpe_autosleep_delay); i++) {
|
|
if (stmpe_autosleep_delay[i] >= timeout)
|
|
return i;
|
|
}
|
|
|
|
/*
|
|
* requests for delays longer than supported should not return the
|
|
* longest supported delay
|
|
*/
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int stmpe_autosleep(struct stmpe *stmpe, int autosleep_timeout)
|
|
{
|
|
int ret;
|
|
|
|
if (!stmpe->variant->enable_autosleep)
|
|
return -ENOSYS;
|
|
|
|
mutex_lock(&stmpe->lock);
|
|
ret = stmpe->variant->enable_autosleep(stmpe, autosleep_timeout);
|
|
mutex_unlock(&stmpe->lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Both stmpe 1601/2403 support same layout for autosleep
|
|
*/
|
|
static int stmpe1601_autosleep(struct stmpe *stmpe,
|
|
int autosleep_timeout)
|
|
{
|
|
int ret, timeout;
|
|
|
|
/* choose the best available timeout */
|
|
timeout = stmpe_round_timeout(autosleep_timeout);
|
|
if (timeout < 0) {
|
|
dev_err(stmpe->dev, "invalid timeout\n");
|
|
return timeout;
|
|
}
|
|
|
|
ret = __stmpe_set_bits(stmpe, STMPE1601_REG_SYS_CTRL2,
|
|
STMPE1601_AUTOSLEEP_TIMEOUT_MASK,
|
|
timeout);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return __stmpe_set_bits(stmpe, STMPE1601_REG_SYS_CTRL2,
|
|
STPME1601_AUTOSLEEP_ENABLE,
|
|
STPME1601_AUTOSLEEP_ENABLE);
|
|
}
|
|
|
|
static int stmpe1601_enable(struct stmpe *stmpe, unsigned int blocks,
|
|
bool enable)
|
|
{
|
|
unsigned int mask = 0;
|
|
|
|
if (blocks & STMPE_BLOCK_GPIO)
|
|
mask |= STMPE1601_SYS_CTRL_ENABLE_GPIO;
|
|
else
|
|
mask &= ~STMPE1601_SYS_CTRL_ENABLE_GPIO;
|
|
|
|
if (blocks & STMPE_BLOCK_KEYPAD)
|
|
mask |= STMPE1601_SYS_CTRL_ENABLE_KPC;
|
|
else
|
|
mask &= ~STMPE1601_SYS_CTRL_ENABLE_KPC;
|
|
|
|
if (blocks & STMPE_BLOCK_PWM)
|
|
mask |= STMPE1601_SYS_CTRL_ENABLE_SPWM;
|
|
else
|
|
mask &= ~STMPE1601_SYS_CTRL_ENABLE_SPWM;
|
|
|
|
return __stmpe_set_bits(stmpe, STMPE1601_REG_SYS_CTRL, mask,
|
|
enable ? mask : 0);
|
|
}
|
|
|
|
static int stmpe1601_get_altfunc(struct stmpe *stmpe, enum stmpe_block block)
|
|
{
|
|
switch (block) {
|
|
case STMPE_BLOCK_PWM:
|
|
return 2;
|
|
|
|
case STMPE_BLOCK_KEYPAD:
|
|
return 1;
|
|
|
|
case STMPE_BLOCK_GPIO:
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static struct stmpe_variant_info stmpe1601 = {
|
|
.name = "stmpe1601",
|
|
.id_val = 0x0210,
|
|
.id_mask = 0xfff0, /* at least 0x0210 and 0x0212 */
|
|
.num_gpios = 16,
|
|
.af_bits = 2,
|
|
.regs = stmpe1601_regs,
|
|
.blocks = stmpe1601_blocks,
|
|
.num_blocks = ARRAY_SIZE(stmpe1601_blocks),
|
|
.num_irqs = STMPE1601_NR_INTERNAL_IRQS,
|
|
.enable = stmpe1601_enable,
|
|
.get_altfunc = stmpe1601_get_altfunc,
|
|
.enable_autosleep = stmpe1601_autosleep,
|
|
};
|
|
|
|
/*
|
|
* STMPE1801
|
|
*/
|
|
static const u8 stmpe1801_regs[] = {
|
|
[STMPE_IDX_CHIP_ID] = STMPE1801_REG_CHIP_ID,
|
|
[STMPE_IDX_ICR_LSB] = STMPE1801_REG_INT_CTRL_LOW,
|
|
[STMPE_IDX_IER_LSB] = STMPE1801_REG_INT_EN_MASK_LOW,
|
|
[STMPE_IDX_ISR_LSB] = STMPE1801_REG_INT_STA_LOW,
|
|
[STMPE_IDX_GPMR_LSB] = STMPE1801_REG_GPIO_MP_LOW,
|
|
[STMPE_IDX_GPSR_LSB] = STMPE1801_REG_GPIO_SET_LOW,
|
|
[STMPE_IDX_GPCR_LSB] = STMPE1801_REG_GPIO_CLR_LOW,
|
|
[STMPE_IDX_GPDR_LSB] = STMPE1801_REG_GPIO_SET_DIR_LOW,
|
|
[STMPE_IDX_GPRER_LSB] = STMPE1801_REG_GPIO_RE_LOW,
|
|
[STMPE_IDX_GPFER_LSB] = STMPE1801_REG_GPIO_FE_LOW,
|
|
[STMPE_IDX_GPPUR_LSB] = STMPE1801_REG_GPIO_PULL_UP_LOW,
|
|
[STMPE_IDX_IEGPIOR_LSB] = STMPE1801_REG_INT_EN_GPIO_MASK_LOW,
|
|
[STMPE_IDX_ISGPIOR_LSB] = STMPE1801_REG_INT_STA_GPIO_LOW,
|
|
};
|
|
|
|
static struct stmpe_variant_block stmpe1801_blocks[] = {
|
|
{
|
|
.cell = &stmpe_gpio_cell,
|
|
.irq = STMPE1801_IRQ_GPIOC,
|
|
.block = STMPE_BLOCK_GPIO,
|
|
},
|
|
{
|
|
.cell = &stmpe_keypad_cell,
|
|
.irq = STMPE1801_IRQ_KEYPAD,
|
|
.block = STMPE_BLOCK_KEYPAD,
|
|
},
|
|
};
|
|
|
|
static int stmpe1801_enable(struct stmpe *stmpe, unsigned int blocks,
|
|
bool enable)
|
|
{
|
|
unsigned int mask = 0;
|
|
if (blocks & STMPE_BLOCK_GPIO)
|
|
mask |= STMPE1801_MSK_INT_EN_GPIO;
|
|
|
|
if (blocks & STMPE_BLOCK_KEYPAD)
|
|
mask |= STMPE1801_MSK_INT_EN_KPC;
|
|
|
|
return __stmpe_set_bits(stmpe, STMPE1801_REG_INT_EN_MASK_LOW, mask,
|
|
enable ? mask : 0);
|
|
}
|
|
|
|
static int stmpe1801_reset(struct stmpe *stmpe)
|
|
{
|
|
unsigned long timeout;
|
|
int ret = 0;
|
|
|
|
ret = __stmpe_set_bits(stmpe, STMPE1801_REG_SYS_CTRL,
|
|
STMPE1801_MSK_SYS_CTRL_RESET, STMPE1801_MSK_SYS_CTRL_RESET);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
timeout = jiffies + msecs_to_jiffies(100);
|
|
while (time_before(jiffies, timeout)) {
|
|
ret = __stmpe_reg_read(stmpe, STMPE1801_REG_SYS_CTRL);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (!(ret & STMPE1801_MSK_SYS_CTRL_RESET))
|
|
return 0;
|
|
usleep_range(100, 200);
|
|
}
|
|
return -EIO;
|
|
}
|
|
|
|
static struct stmpe_variant_info stmpe1801 = {
|
|
.name = "stmpe1801",
|
|
.id_val = STMPE1801_ID,
|
|
.id_mask = 0xfff0,
|
|
.num_gpios = 18,
|
|
.af_bits = 0,
|
|
.regs = stmpe1801_regs,
|
|
.blocks = stmpe1801_blocks,
|
|
.num_blocks = ARRAY_SIZE(stmpe1801_blocks),
|
|
.num_irqs = STMPE1801_NR_INTERNAL_IRQS,
|
|
.enable = stmpe1801_enable,
|
|
/* stmpe1801 do not have any gpio alternate function */
|
|
.get_altfunc = NULL,
|
|
};
|
|
|
|
/*
|
|
* STMPE24XX
|
|
*/
|
|
|
|
static const u8 stmpe24xx_regs[] = {
|
|
[STMPE_IDX_CHIP_ID] = STMPE24XX_REG_CHIP_ID,
|
|
[STMPE_IDX_ICR_LSB] = STMPE24XX_REG_ICR_LSB,
|
|
[STMPE_IDX_IER_LSB] = STMPE24XX_REG_IER_LSB,
|
|
[STMPE_IDX_ISR_MSB] = STMPE24XX_REG_ISR_MSB,
|
|
[STMPE_IDX_GPMR_LSB] = STMPE24XX_REG_GPMR_LSB,
|
|
[STMPE_IDX_GPSR_LSB] = STMPE24XX_REG_GPSR_LSB,
|
|
[STMPE_IDX_GPCR_LSB] = STMPE24XX_REG_GPCR_LSB,
|
|
[STMPE_IDX_GPDR_LSB] = STMPE24XX_REG_GPDR_LSB,
|
|
[STMPE_IDX_GPRER_LSB] = STMPE24XX_REG_GPRER_LSB,
|
|
[STMPE_IDX_GPFER_LSB] = STMPE24XX_REG_GPFER_LSB,
|
|
[STMPE_IDX_GPPUR_LSB] = STMPE24XX_REG_GPPUR_LSB,
|
|
[STMPE_IDX_GPPDR_LSB] = STMPE24XX_REG_GPPDR_LSB,
|
|
[STMPE_IDX_GPAFR_U_MSB] = STMPE24XX_REG_GPAFR_U_MSB,
|
|
[STMPE_IDX_IEGPIOR_LSB] = STMPE24XX_REG_IEGPIOR_LSB,
|
|
[STMPE_IDX_ISGPIOR_MSB] = STMPE24XX_REG_ISGPIOR_MSB,
|
|
[STMPE_IDX_GPEDR_MSB] = STMPE24XX_REG_GPEDR_MSB,
|
|
};
|
|
|
|
static struct stmpe_variant_block stmpe24xx_blocks[] = {
|
|
{
|
|
.cell = &stmpe_gpio_cell,
|
|
.irq = STMPE24XX_IRQ_GPIOC,
|
|
.block = STMPE_BLOCK_GPIO,
|
|
},
|
|
{
|
|
.cell = &stmpe_keypad_cell,
|
|
.irq = STMPE24XX_IRQ_KEYPAD,
|
|
.block = STMPE_BLOCK_KEYPAD,
|
|
},
|
|
{
|
|
.cell = &stmpe_pwm_cell,
|
|
.irq = STMPE24XX_IRQ_PWM0,
|
|
.block = STMPE_BLOCK_PWM,
|
|
},
|
|
};
|
|
|
|
static int stmpe24xx_enable(struct stmpe *stmpe, unsigned int blocks,
|
|
bool enable)
|
|
{
|
|
unsigned int mask = 0;
|
|
|
|
if (blocks & STMPE_BLOCK_GPIO)
|
|
mask |= STMPE24XX_SYS_CTRL_ENABLE_GPIO;
|
|
|
|
if (blocks & STMPE_BLOCK_KEYPAD)
|
|
mask |= STMPE24XX_SYS_CTRL_ENABLE_KPC;
|
|
|
|
return __stmpe_set_bits(stmpe, STMPE24XX_REG_SYS_CTRL, mask,
|
|
enable ? mask : 0);
|
|
}
|
|
|
|
static int stmpe24xx_get_altfunc(struct stmpe *stmpe, enum stmpe_block block)
|
|
{
|
|
switch (block) {
|
|
case STMPE_BLOCK_ROTATOR:
|
|
return 2;
|
|
|
|
case STMPE_BLOCK_KEYPAD:
|
|
case STMPE_BLOCK_PWM:
|
|
return 1;
|
|
|
|
case STMPE_BLOCK_GPIO:
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static struct stmpe_variant_info stmpe2401 = {
|
|
.name = "stmpe2401",
|
|
.id_val = 0x0101,
|
|
.id_mask = 0xffff,
|
|
.num_gpios = 24,
|
|
.af_bits = 2,
|
|
.regs = stmpe24xx_regs,
|
|
.blocks = stmpe24xx_blocks,
|
|
.num_blocks = ARRAY_SIZE(stmpe24xx_blocks),
|
|
.num_irqs = STMPE24XX_NR_INTERNAL_IRQS,
|
|
.enable = stmpe24xx_enable,
|
|
.get_altfunc = stmpe24xx_get_altfunc,
|
|
};
|
|
|
|
static struct stmpe_variant_info stmpe2403 = {
|
|
.name = "stmpe2403",
|
|
.id_val = 0x0120,
|
|
.id_mask = 0xffff,
|
|
.num_gpios = 24,
|
|
.af_bits = 2,
|
|
.regs = stmpe24xx_regs,
|
|
.blocks = stmpe24xx_blocks,
|
|
.num_blocks = ARRAY_SIZE(stmpe24xx_blocks),
|
|
.num_irqs = STMPE24XX_NR_INTERNAL_IRQS,
|
|
.enable = stmpe24xx_enable,
|
|
.get_altfunc = stmpe24xx_get_altfunc,
|
|
.enable_autosleep = stmpe1601_autosleep, /* same as stmpe1601 */
|
|
};
|
|
|
|
static struct stmpe_variant_info *stmpe_variant_info[STMPE_NBR_PARTS] = {
|
|
[STMPE610] = &stmpe610,
|
|
[STMPE801] = &stmpe801,
|
|
[STMPE811] = &stmpe811,
|
|
[STMPE1601] = &stmpe1601,
|
|
[STMPE1801] = &stmpe1801,
|
|
[STMPE2401] = &stmpe2401,
|
|
[STMPE2403] = &stmpe2403,
|
|
};
|
|
|
|
/*
|
|
* These devices can be connected in a 'no-irq' configuration - the irq pin
|
|
* is not used and the device cannot interrupt the CPU. Here we only list
|
|
* devices which support this configuration - the driver will fail probing
|
|
* for any devices not listed here which are configured in this way.
|
|
*/
|
|
static struct stmpe_variant_info *stmpe_noirq_variant_info[STMPE_NBR_PARTS] = {
|
|
[STMPE801] = &stmpe801_noirq,
|
|
};
|
|
|
|
static irqreturn_t stmpe_irq(int irq, void *data)
|
|
{
|
|
struct stmpe *stmpe = data;
|
|
struct stmpe_variant_info *variant = stmpe->variant;
|
|
int num = DIV_ROUND_UP(variant->num_irqs, 8);
|
|
u8 israddr;
|
|
u8 isr[3];
|
|
int ret;
|
|
int i;
|
|
|
|
if (variant->id_val == STMPE801_ID) {
|
|
int base = irq_create_mapping(stmpe->domain, 0);
|
|
|
|
handle_nested_irq(base);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
if (variant->id_val == STMPE1801_ID)
|
|
israddr = stmpe->regs[STMPE_IDX_ISR_LSB];
|
|
else
|
|
israddr = stmpe->regs[STMPE_IDX_ISR_MSB];
|
|
|
|
ret = stmpe_block_read(stmpe, israddr, num, isr);
|
|
if (ret < 0)
|
|
return IRQ_NONE;
|
|
|
|
for (i = 0; i < num; i++) {
|
|
int bank = num - i - 1;
|
|
u8 status = isr[i];
|
|
u8 clear;
|
|
|
|
status &= stmpe->ier[bank];
|
|
if (!status)
|
|
continue;
|
|
|
|
clear = status;
|
|
while (status) {
|
|
int bit = __ffs(status);
|
|
int line = bank * 8 + bit;
|
|
int nestedirq = irq_create_mapping(stmpe->domain, line);
|
|
|
|
handle_nested_irq(nestedirq);
|
|
status &= ~(1 << bit);
|
|
}
|
|
|
|
stmpe_reg_write(stmpe, israddr + i, clear);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void stmpe_irq_lock(struct irq_data *data)
|
|
{
|
|
struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
|
|
|
|
mutex_lock(&stmpe->irq_lock);
|
|
}
|
|
|
|
static void stmpe_irq_sync_unlock(struct irq_data *data)
|
|
{
|
|
struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
|
|
struct stmpe_variant_info *variant = stmpe->variant;
|
|
int num = DIV_ROUND_UP(variant->num_irqs, 8);
|
|
int i;
|
|
|
|
for (i = 0; i < num; i++) {
|
|
u8 new = stmpe->ier[i];
|
|
u8 old = stmpe->oldier[i];
|
|
|
|
if (new == old)
|
|
continue;
|
|
|
|
stmpe->oldier[i] = new;
|
|
stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_IER_LSB] - i, new);
|
|
}
|
|
|
|
mutex_unlock(&stmpe->irq_lock);
|
|
}
|
|
|
|
static void stmpe_irq_mask(struct irq_data *data)
|
|
{
|
|
struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
|
|
int offset = data->hwirq;
|
|
int regoffset = offset / 8;
|
|
int mask = 1 << (offset % 8);
|
|
|
|
stmpe->ier[regoffset] &= ~mask;
|
|
}
|
|
|
|
static void stmpe_irq_unmask(struct irq_data *data)
|
|
{
|
|
struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
|
|
int offset = data->hwirq;
|
|
int regoffset = offset / 8;
|
|
int mask = 1 << (offset % 8);
|
|
|
|
stmpe->ier[regoffset] |= mask;
|
|
}
|
|
|
|
static struct irq_chip stmpe_irq_chip = {
|
|
.name = "stmpe",
|
|
.irq_bus_lock = stmpe_irq_lock,
|
|
.irq_bus_sync_unlock = stmpe_irq_sync_unlock,
|
|
.irq_mask = stmpe_irq_mask,
|
|
.irq_unmask = stmpe_irq_unmask,
|
|
};
|
|
|
|
static int stmpe_irq_map(struct irq_domain *d, unsigned int virq,
|
|
irq_hw_number_t hwirq)
|
|
{
|
|
struct stmpe *stmpe = d->host_data;
|
|
struct irq_chip *chip = NULL;
|
|
|
|
if (stmpe->variant->id_val != STMPE801_ID)
|
|
chip = &stmpe_irq_chip;
|
|
|
|
irq_set_chip_data(virq, stmpe);
|
|
irq_set_chip_and_handler(virq, chip, handle_edge_irq);
|
|
irq_set_nested_thread(virq, 1);
|
|
irq_set_noprobe(virq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void stmpe_irq_unmap(struct irq_domain *d, unsigned int virq)
|
|
{
|
|
irq_set_chip_and_handler(virq, NULL, NULL);
|
|
irq_set_chip_data(virq, NULL);
|
|
}
|
|
|
|
static const struct irq_domain_ops stmpe_irq_ops = {
|
|
.map = stmpe_irq_map,
|
|
.unmap = stmpe_irq_unmap,
|
|
.xlate = irq_domain_xlate_twocell,
|
|
};
|
|
|
|
static int stmpe_irq_init(struct stmpe *stmpe, struct device_node *np)
|
|
{
|
|
int base = 0;
|
|
int num_irqs = stmpe->variant->num_irqs;
|
|
|
|
stmpe->domain = irq_domain_add_simple(np, num_irqs, base,
|
|
&stmpe_irq_ops, stmpe);
|
|
if (!stmpe->domain) {
|
|
dev_err(stmpe->dev, "Failed to create irqdomain\n");
|
|
return -ENOSYS;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int stmpe_chip_init(struct stmpe *stmpe)
|
|
{
|
|
unsigned int irq_trigger = stmpe->pdata->irq_trigger;
|
|
int autosleep_timeout = stmpe->pdata->autosleep_timeout;
|
|
struct stmpe_variant_info *variant = stmpe->variant;
|
|
u8 icr = 0;
|
|
unsigned int id;
|
|
u8 data[2];
|
|
int ret;
|
|
|
|
ret = stmpe_block_read(stmpe, stmpe->regs[STMPE_IDX_CHIP_ID],
|
|
ARRAY_SIZE(data), data);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
id = (data[0] << 8) | data[1];
|
|
if ((id & variant->id_mask) != variant->id_val) {
|
|
dev_err(stmpe->dev, "unknown chip id: %#x\n", id);
|
|
return -EINVAL;
|
|
}
|
|
|
|
dev_info(stmpe->dev, "%s detected, chip id: %#x\n", variant->name, id);
|
|
|
|
/* Disable all modules -- subdrivers should enable what they need. */
|
|
ret = stmpe_disable(stmpe, ~0);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (id == STMPE1801_ID) {
|
|
ret = stmpe1801_reset(stmpe);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (stmpe->irq >= 0) {
|
|
if (id == STMPE801_ID)
|
|
icr = STMPE801_REG_SYS_CTRL_INT_EN;
|
|
else
|
|
icr = STMPE_ICR_LSB_GIM;
|
|
|
|
/* STMPE801 doesn't support Edge interrupts */
|
|
if (id != STMPE801_ID) {
|
|
if (irq_trigger == IRQF_TRIGGER_FALLING ||
|
|
irq_trigger == IRQF_TRIGGER_RISING)
|
|
icr |= STMPE_ICR_LSB_EDGE;
|
|
}
|
|
|
|
if (irq_trigger == IRQF_TRIGGER_RISING ||
|
|
irq_trigger == IRQF_TRIGGER_HIGH) {
|
|
if (id == STMPE801_ID)
|
|
icr |= STMPE801_REG_SYS_CTRL_INT_HI;
|
|
else
|
|
icr |= STMPE_ICR_LSB_HIGH;
|
|
}
|
|
}
|
|
|
|
if (stmpe->pdata->autosleep) {
|
|
ret = stmpe_autosleep(stmpe, autosleep_timeout);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_ICR_LSB], icr);
|
|
}
|
|
|
|
static int stmpe_add_device(struct stmpe *stmpe, const struct mfd_cell *cell)
|
|
{
|
|
return mfd_add_devices(stmpe->dev, stmpe->pdata->id, cell, 1,
|
|
NULL, 0, stmpe->domain);
|
|
}
|
|
|
|
static int stmpe_devices_init(struct stmpe *stmpe)
|
|
{
|
|
struct stmpe_variant_info *variant = stmpe->variant;
|
|
unsigned int platform_blocks = stmpe->pdata->blocks;
|
|
int ret = -EINVAL;
|
|
int i, j;
|
|
|
|
for (i = 0; i < variant->num_blocks; i++) {
|
|
struct stmpe_variant_block *block = &variant->blocks[i];
|
|
|
|
if (!(platform_blocks & block->block))
|
|
continue;
|
|
|
|
for (j = 0; j < block->cell->num_resources; j++) {
|
|
struct resource *res =
|
|
(struct resource *) &block->cell->resources[j];
|
|
|
|
/* Dynamically fill in a variant's IRQ. */
|
|
if (res->flags & IORESOURCE_IRQ)
|
|
res->start = res->end = block->irq + j;
|
|
}
|
|
|
|
platform_blocks &= ~block->block;
|
|
ret = stmpe_add_device(stmpe, block->cell);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (platform_blocks)
|
|
dev_warn(stmpe->dev,
|
|
"platform wants blocks (%#x) not present on variant",
|
|
platform_blocks);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void stmpe_of_probe(struct stmpe_platform_data *pdata,
|
|
struct device_node *np)
|
|
{
|
|
struct device_node *child;
|
|
|
|
pdata->id = of_alias_get_id(np, "stmpe-i2c");
|
|
if (pdata->id < 0)
|
|
pdata->id = -1;
|
|
|
|
pdata->irq_gpio = of_get_named_gpio_flags(np, "irq-gpio", 0,
|
|
&pdata->irq_trigger);
|
|
if (gpio_is_valid(pdata->irq_gpio))
|
|
pdata->irq_over_gpio = 1;
|
|
else
|
|
pdata->irq_trigger = IRQF_TRIGGER_NONE;
|
|
|
|
of_property_read_u32(np, "st,autosleep-timeout",
|
|
&pdata->autosleep_timeout);
|
|
|
|
pdata->autosleep = (pdata->autosleep_timeout) ? true : false;
|
|
|
|
for_each_child_of_node(np, child) {
|
|
if (!strcmp(child->name, "stmpe_gpio")) {
|
|
pdata->blocks |= STMPE_BLOCK_GPIO;
|
|
} else if (!strcmp(child->name, "stmpe_keypad")) {
|
|
pdata->blocks |= STMPE_BLOCK_KEYPAD;
|
|
} else if (!strcmp(child->name, "stmpe_touchscreen")) {
|
|
pdata->blocks |= STMPE_BLOCK_TOUCHSCREEN;
|
|
} else if (!strcmp(child->name, "stmpe_adc")) {
|
|
pdata->blocks |= STMPE_BLOCK_ADC;
|
|
} else if (!strcmp(child->name, "stmpe_pwm")) {
|
|
pdata->blocks |= STMPE_BLOCK_PWM;
|
|
} else if (!strcmp(child->name, "stmpe_rotator")) {
|
|
pdata->blocks |= STMPE_BLOCK_ROTATOR;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Called from client specific probe routines */
|
|
int stmpe_probe(struct stmpe_client_info *ci, enum stmpe_partnum partnum)
|
|
{
|
|
struct stmpe_platform_data *pdata;
|
|
struct device_node *np = ci->dev->of_node;
|
|
struct stmpe *stmpe;
|
|
int ret;
|
|
|
|
pdata = devm_kzalloc(ci->dev, sizeof(*pdata), GFP_KERNEL);
|
|
if (!pdata)
|
|
return -ENOMEM;
|
|
|
|
stmpe_of_probe(pdata, np);
|
|
|
|
if (of_find_property(np, "interrupts", NULL) == NULL)
|
|
ci->irq = -1;
|
|
|
|
stmpe = devm_kzalloc(ci->dev, sizeof(struct stmpe), GFP_KERNEL);
|
|
if (!stmpe)
|
|
return -ENOMEM;
|
|
|
|
mutex_init(&stmpe->irq_lock);
|
|
mutex_init(&stmpe->lock);
|
|
|
|
stmpe->dev = ci->dev;
|
|
stmpe->client = ci->client;
|
|
stmpe->pdata = pdata;
|
|
stmpe->ci = ci;
|
|
stmpe->partnum = partnum;
|
|
stmpe->variant = stmpe_variant_info[partnum];
|
|
stmpe->regs = stmpe->variant->regs;
|
|
stmpe->num_gpios = stmpe->variant->num_gpios;
|
|
stmpe->vcc = devm_regulator_get_optional(ci->dev, "vcc");
|
|
if (!IS_ERR(stmpe->vcc)) {
|
|
ret = regulator_enable(stmpe->vcc);
|
|
if (ret)
|
|
dev_warn(ci->dev, "failed to enable VCC supply\n");
|
|
}
|
|
stmpe->vio = devm_regulator_get_optional(ci->dev, "vio");
|
|
if (!IS_ERR(stmpe->vio)) {
|
|
ret = regulator_enable(stmpe->vio);
|
|
if (ret)
|
|
dev_warn(ci->dev, "failed to enable VIO supply\n");
|
|
}
|
|
dev_set_drvdata(stmpe->dev, stmpe);
|
|
|
|
if (ci->init)
|
|
ci->init(stmpe);
|
|
|
|
if (pdata->irq_over_gpio) {
|
|
ret = devm_gpio_request_one(ci->dev, pdata->irq_gpio,
|
|
GPIOF_DIR_IN, "stmpe");
|
|
if (ret) {
|
|
dev_err(stmpe->dev, "failed to request IRQ GPIO: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
stmpe->irq = gpio_to_irq(pdata->irq_gpio);
|
|
} else {
|
|
stmpe->irq = ci->irq;
|
|
}
|
|
|
|
if (stmpe->irq < 0) {
|
|
/* use alternate variant info for no-irq mode, if supported */
|
|
dev_info(stmpe->dev,
|
|
"%s configured in no-irq mode by platform data\n",
|
|
stmpe->variant->name);
|
|
if (!stmpe_noirq_variant_info[stmpe->partnum]) {
|
|
dev_err(stmpe->dev,
|
|
"%s does not support no-irq mode!\n",
|
|
stmpe->variant->name);
|
|
return -ENODEV;
|
|
}
|
|
stmpe->variant = stmpe_noirq_variant_info[stmpe->partnum];
|
|
} else if (pdata->irq_trigger == IRQF_TRIGGER_NONE) {
|
|
pdata->irq_trigger = irq_get_trigger_type(stmpe->irq);
|
|
}
|
|
|
|
ret = stmpe_chip_init(stmpe);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (stmpe->irq >= 0) {
|
|
ret = stmpe_irq_init(stmpe, np);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = devm_request_threaded_irq(ci->dev, stmpe->irq, NULL,
|
|
stmpe_irq, pdata->irq_trigger | IRQF_ONESHOT,
|
|
"stmpe", stmpe);
|
|
if (ret) {
|
|
dev_err(stmpe->dev, "failed to request IRQ: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
ret = stmpe_devices_init(stmpe);
|
|
if (!ret)
|
|
return 0;
|
|
|
|
dev_err(stmpe->dev, "failed to add children\n");
|
|
mfd_remove_devices(stmpe->dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int stmpe_remove(struct stmpe *stmpe)
|
|
{
|
|
if (!IS_ERR(stmpe->vio))
|
|
regulator_disable(stmpe->vio);
|
|
if (!IS_ERR(stmpe->vcc))
|
|
regulator_disable(stmpe->vcc);
|
|
|
|
mfd_remove_devices(stmpe->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int stmpe_suspend(struct device *dev)
|
|
{
|
|
struct stmpe *stmpe = dev_get_drvdata(dev);
|
|
|
|
if (stmpe->irq >= 0 && device_may_wakeup(dev))
|
|
enable_irq_wake(stmpe->irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int stmpe_resume(struct device *dev)
|
|
{
|
|
struct stmpe *stmpe = dev_get_drvdata(dev);
|
|
|
|
if (stmpe->irq >= 0 && device_may_wakeup(dev))
|
|
disable_irq_wake(stmpe->irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
const struct dev_pm_ops stmpe_dev_pm_ops = {
|
|
.suspend = stmpe_suspend,
|
|
.resume = stmpe_resume,
|
|
};
|
|
#endif
|