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Message-ID: <1277985648-28468-1-git-send-email-rabin.vincent@stericsson.com>
Date: Thu, 1 Jul 2010 17:30:46 +0530
From: Rabin Vincent <rabin.vincent@...ricsson.com>
To: <linux-kernel@...r.kernel.org>
Cc: Samuel Ortiz <sameo@...ux.intel.com>,
<STEricsson_nomadik_linux@...t.st.com>,
<linus.walleij@...ricsson.com>, <l.fu@...gutronix.de>,
Rabin Vincent <rabin.vincent@...ricsson.com>
Subject: [PATCHv3 1/3] mfd: add STMPE I/O Expander support
Add support for the STMPE family of I/O Expanders from
STMicroelectronics. These devices include upto 24 gpios and a varying
selection of blocks, including PWM, keypad, and touchscreen controllers.
This patch adds the MFD core.
[l.fu@...gutronix.de: fix stmpe811 enable hook]
Acked-by: Linus Walleij <linus.walleij@...ricsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@...ricsson.com>
---
CHANGELOG (for the whole set)
v2 -> v3:
- Locking fixes
- Expanded Kconfig description
- Moved stmpe-devices.c content into stmpe.c
- Moved debug ifdefs to header
- Folded in Luotao Fu's one-liner fix for STMPE811 enable
- Folded in Luotao Fu's one-liner fix for stmpe-gpio input
direction
v1 -> v2
- Variant data to support other STMPE* variants
- Enable/disable API
- GPIO setup/remove callbacks
- pdata made optional for GPIO
- Platform specifies which blocks it wants to use
- IRQ invert polarity option
- STMPE811 support (needs testing)
drivers/mfd/Kconfig | 23 ++
drivers/mfd/Makefile | 1 +
drivers/mfd/stmpe.c | 915 +++++++++++++++++++++++++++++++++++++++++++++
drivers/mfd/stmpe.h | 176 +++++++++
include/linux/mfd/stmpe.h | 154 ++++++++
5 files changed, 1269 insertions(+), 0 deletions(-)
create mode 100644 drivers/mfd/stmpe.c
create mode 100644 drivers/mfd/stmpe.h
create mode 100644 include/linux/mfd/stmpe.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 9da0e50..08e4693 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -177,6 +177,29 @@ config TWL4030_CODEC
select MFD_CORE
default n
+config MFD_STMPE
+ bool "Support STMicroelectronics STMPE"
+ depends on I2C=y && GENERIC_HARDIRQS
+ select MFD_CORE
+ help
+ Support for the STMPE family of I/O Expanders from
+ STMicroelectronics.
+
+ Currently supported devices are:
+
+ STMPE811: GPIO, Touchscreen
+ STMPE1601: GPIO, Keypad
+ STMPE2401: GPIO, Keypad
+ STMPE2403: GPIO, Keypad
+
+ This driver provides common support for accessing the device,
+ additional drivers must be enabled in order to use the functionality
+ of the device. Currently available sub drivers are:
+
+ GPIO: stmpe-gpio
+ Keypad: stmpe-keypad
+ Touchscreen: stmpe-ts
+
config MFD_TC35892
bool "Support Toshiba TC35892"
depends on I2C=y && GENERIC_HARDIRQS
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index fb503e7..4410747 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_HTC_I2CPLD) += htc-i2cpld.o
obj-$(CONFIG_MFD_DAVINCI_VOICECODEC) += davinci_voicecodec.o
obj-$(CONFIG_MFD_DM355EVM_MSP) += dm355evm_msp.o
+obj-$(CONFIG_MFD_STMPE) += stmpe.o
obj-$(CONFIG_MFD_TC35892) += tc35892.o
obj-$(CONFIG_MFD_T7L66XB) += t7l66xb.o tmio_core.o
obj-$(CONFIG_MFD_TC6387XB) += tc6387xb.o tmio_core.o
diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c
new file mode 100644
index 0000000..a7f3099
--- /dev/null
+++ b/drivers/mfd/stmpe.c
@@ -0,0 +1,915 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License Terms: GNU General Public License, version 2
+ * Author: Rabin Vincent <rabin.vincent@...ricsson.com> for ST-Ericsson
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/stmpe.h>
+#include "stmpe.h"
+
+static int __stmpe_enable(struct stmpe *stmpe, unsigned int blocks)
+{
+ return stmpe->variant->enable(stmpe, blocks, true);
+}
+
+static int __stmpe_disable(struct stmpe *stmpe, unsigned int blocks)
+{
+ return stmpe->variant->enable(stmpe, blocks, false);
+}
+
+static int __stmpe_reg_read(struct stmpe *stmpe, u8 reg)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(stmpe->i2c, reg);
+ if (ret < 0)
+ dev_err(stmpe->dev, "failed to read reg %#x: %d\n",
+ reg, ret);
+
+ dev_vdbg(stmpe->dev, "rd: reg %#x => data %#x\n", reg, ret);
+
+ return ret;
+}
+
+static int __stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val)
+{
+ int ret;
+
+ dev_vdbg(stmpe->dev, "wr: reg %#x <= %#x\n", reg, val);
+
+ ret = i2c_smbus_write_byte_data(stmpe->i2c, reg, val);
+ if (ret < 0)
+ dev_err(stmpe->dev, "failed to write reg %#x: %d\n",
+ reg, ret);
+
+ return ret;
+}
+
+static int __stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val)
+{
+ int ret;
+
+ ret = __stmpe_reg_read(stmpe, reg);
+ if (ret < 0)
+ return ret;
+
+ ret &= ~mask;
+ ret |= val;
+
+ return __stmpe_reg_write(stmpe, reg, ret);
+}
+
+static int __stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length,
+ u8 *values)
+{
+ int ret;
+
+ ret = i2c_smbus_read_i2c_block_data(stmpe->i2c, reg, length, values);
+ if (ret < 0)
+ dev_err(stmpe->dev, "failed to read regs %#x: %d\n",
+ reg, ret);
+
+ dev_vdbg(stmpe->dev, "rd: reg %#x (%d) => ret %#x\n", reg, length, ret);
+ stmpe_dump_bytes("stmpe rd: ", values, length);
+
+ return ret;
+}
+
+static int __stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
+ const u8 *values)
+{
+ int ret;
+
+ dev_vdbg(stmpe->dev, "wr: regs %#x (%d)\n", reg, length);
+ stmpe_dump_bytes("stmpe wr: ", values, length);
+
+ ret = i2c_smbus_write_i2c_block_data(stmpe->i2c, reg, length,
+ values);
+ if (ret < 0)
+ dev_err(stmpe->dev, "failed to write regs %#x: %d\n",
+ reg, ret);
+
+ return ret;
+}
+
+/**
+ * stmpe_enable - enable blocks on an STMPE device
+ * @stmpe: Device to work on
+ * @blocks: Mask of blocks (enum stmpe_block values) to enable
+ */
+int stmpe_enable(struct stmpe *stmpe, unsigned int blocks)
+{
+ int ret;
+
+ mutex_lock(&stmpe->lock);
+ ret = __stmpe_enable(stmpe, blocks);
+ mutex_unlock(&stmpe->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(stmpe_enable);
+
+/**
+ * stmpe_disable - disable blocks on an STMPE device
+ * @stmpe: Device to work on
+ * @blocks: Mask of blocks (enum stmpe_block values) to enable
+ */
+int stmpe_disable(struct stmpe *stmpe, unsigned int blocks)
+{
+ int ret;
+
+ mutex_lock(&stmpe->lock);
+ ret = __stmpe_disable(stmpe, blocks);
+ mutex_unlock(&stmpe->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(stmpe_disable);
+
+/**
+ * stmpe_reg_read() - read a single STMPE register
+ * @stmpe: Device to read from
+ * @reg: Register to read
+ */
+int stmpe_reg_read(struct stmpe *stmpe, u8 reg)
+{
+ int ret;
+
+ mutex_lock(&stmpe->lock);
+ ret = __stmpe_reg_read(stmpe, reg);
+ mutex_unlock(&stmpe->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(stmpe_reg_read);
+
+/**
+ * stmpe_reg_write() - write a single STMPE register
+ * @stmpe: Device to write to
+ * @reg: Register to write
+ * @val: Value to write
+ */
+int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val)
+{
+ int ret;
+
+ mutex_lock(&stmpe->lock);
+ ret = __stmpe_reg_write(stmpe, reg, val);
+ mutex_unlock(&stmpe->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(stmpe_reg_write);
+
+/**
+ * stmpe_set_bits() - set the value of a bitfield in a STMPE register
+ * @stmpe: Device to write to
+ * @reg: Register to write
+ * @mask: Mask of bits to set
+ * @val: Value to set
+ */
+int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val)
+{
+ int ret;
+
+ mutex_lock(&stmpe->lock);
+ ret = __stmpe_set_bits(stmpe, reg, mask, val);
+ mutex_unlock(&stmpe->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(stmpe_set_bits);
+
+/**
+ * stmpe_block_read() - read multiple STMPE registers
+ * @stmpe: Device to read from
+ * @reg: First register
+ * @length: Number of registers
+ * @values: Buffer to write to
+ */
+int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values)
+{
+ int ret;
+
+ mutex_lock(&stmpe->lock);
+ ret = __stmpe_block_read(stmpe, reg, length, values);
+ mutex_unlock(&stmpe->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(stmpe_block_read);
+
+/**
+ * stmpe_block_write() - write multiple STMPE registers
+ * @stmpe: Device to write to
+ * @reg: First register
+ * @length: Number of registers
+ * @values: Values to write
+ */
+int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
+ const u8 *values)
+{
+ int ret;
+
+ mutex_lock(&stmpe->lock);
+ ret = __stmpe_block_write(stmpe, reg, length, values);
+ mutex_unlock(&stmpe->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(stmpe_block_write);
+
+/**
+ * stmpe_set_altfunc: set the alternate function for STMPE pins
+ * @stmpe: Device to configure
+ * @pins: Bitmask of pins to affect
+ * @block: block to enable alternate functions for
+ *
+ * @pins is assumed to have a bit set for each of the bits whose alternate
+ * function is to be changed, numbered according to the GPIOXY numbers.
+ *
+ * If the GPIO module is not enabled, this function automatically enables it in
+ * order to perform the change.
+ */
+int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins, enum stmpe_block block)
+{
+ struct stmpe_variant_info *variant = stmpe->variant;
+ u8 regaddr = stmpe->regs[STMPE_IDX_GPAFR_U_MSB];
+ int af_bits = variant->af_bits;
+ int numregs = DIV_ROUND_UP(stmpe->num_gpios * af_bits, 8);
+ int afperreg = 8 / af_bits;
+ int mask = (1 << af_bits) - 1;
+ u8 regs[numregs];
+ int af;
+ int ret;
+
+ mutex_lock(&stmpe->lock);
+
+ ret = __stmpe_enable(stmpe, STMPE_BLOCK_GPIO);
+ if (ret < 0)
+ goto out;
+
+ ret = __stmpe_block_read(stmpe, regaddr, numregs, regs);
+ if (ret < 0)
+ goto out;
+
+ af = variant->get_altfunc(stmpe, block);
+
+ while (pins) {
+ int pin = __ffs(pins);
+ int regoffset = numregs - (pin / afperreg) - 1;
+ int pos = (pin % afperreg) * (8 / afperreg);
+
+ regs[regoffset] &= ~(mask << pos);
+ regs[regoffset] |= af << pos;
+
+ pins &= ~(1 << pin);
+ }
+
+ ret = __stmpe_block_write(stmpe, regaddr, numregs, regs);
+
+out:
+ mutex_unlock(&stmpe->lock);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(stmpe_set_altfunc);
+
+/*
+ * GPIO (all variants)
+ */
+
+static struct resource stmpe_gpio_resources[] = {
+ /* Start and end filled dynamically */
+ {
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct mfd_cell stmpe_gpio_cell = {
+ .name = "stmpe-gpio",
+ .resources = stmpe_gpio_resources,
+ .num_resources = ARRAY_SIZE(stmpe_gpio_resources),
+};
+
+/*
+ * Keypad (1601, 2401, 2403)
+ */
+
+static struct resource stmpe_keypad_resources[] = {
+ {
+ .name = "KEYPAD",
+ .start = 0,
+ .end = 0,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ .name = "KEYPAD_OVER",
+ .start = 1,
+ .end = 1,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct mfd_cell stmpe_keypad_cell = {
+ .name = "stmpe-keypad",
+ .resources = stmpe_keypad_resources,
+ .num_resources = ARRAY_SIZE(stmpe_keypad_resources),
+};
+
+/*
+ * Touchscreen (STMPE811)
+ */
+
+static struct resource stmpe_ts_resources[] = {
+ {
+ .name = "TOUCH_DET",
+ .start = 0,
+ .end = 0,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ .name = "FIFO_TH",
+ .start = 1,
+ .end = 1,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct mfd_cell stmpe_ts_cell = {
+ .name = "stmpe-ts",
+ .resources = stmpe_ts_resources,
+ .num_resources = ARRAY_SIZE(stmpe_ts_resources),
+};
+
+/*
+ * STMPE811
+ */
+
+static const u8 stmpe811_regs[] = {
+ [STMPE_IDX_CHIP_ID] = STMPE811_REG_CHIP_ID,
+ [STMPE_IDX_ICR_LSB] = STMPE811_REG_INT_CTRL,
+ [STMPE_IDX_IER_LSB] = STMPE811_REG_INT_EN,
+ [STMPE_IDX_ISR_MSB] = STMPE811_REG_INT_STA,
+ [STMPE_IDX_GPMR_LSB] = STMPE811_REG_GPIO_MP_STA,
+ [STMPE_IDX_GPSR_LSB] = STMPE811_REG_GPIO_SET_PIN,
+ [STMPE_IDX_GPCR_LSB] = STMPE811_REG_GPIO_CLR_PIN,
+ [STMPE_IDX_GPDR_LSB] = STMPE811_REG_GPIO_DIR,
+ [STMPE_IDX_GPRER_LSB] = STMPE811_REG_GPIO_RE,
+ [STMPE_IDX_GPFER_LSB] = STMPE811_REG_GPIO_FE,
+ [STMPE_IDX_GPAFR_U_MSB] = STMPE811_REG_GPIO_AF,
+ [STMPE_IDX_IEGPIOR_LSB] = STMPE811_REG_GPIO_INT_EN,
+ [STMPE_IDX_ISGPIOR_MSB] = STMPE811_REG_GPIO_INT_STA,
+ [STMPE_IDX_GPEDR_MSB] = STMPE811_REG_GPIO_ED,
+};
+
+static struct stmpe_variant_block stmpe811_blocks[] = {
+ {
+ .cell = &stmpe_gpio_cell,
+ .irq = STMPE811_IRQ_GPIOC,
+ .block = STMPE_BLOCK_GPIO,
+ },
+ {
+ .cell = &stmpe_ts_cell,
+ .irq = STMPE811_IRQ_TOUCH_DET,
+ .block = STMPE_BLOCK_TOUCHSCREEN,
+ },
+};
+
+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,
+};
+
+/*
+ * 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_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 = STMPE24XX_IRQ_GPIOC,
+ .block = STMPE_BLOCK_GPIO,
+ },
+ {
+ .cell = &stmpe_keypad_cell,
+ .irq = STMPE24XX_IRQ_KEYPAD,
+ .block = STMPE_BLOCK_KEYPAD,
+ },
+};
+
+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;
+
+ if (blocks & STMPE_BLOCK_KEYPAD)
+ mask |= STMPE1601_SYS_CTRL_ENABLE_KPC;
+
+ 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,
+};
+
+/*
+ * 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_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,
+ },
+};
+
+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:
+ 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,
+};
+
+static struct stmpe_variant_info *stmpe_variant_info[] = {
+ [STMPE811] = &stmpe811,
+ [STMPE1601] = &stmpe1601,
+ [STMPE2401] = &stmpe2401,
+ [STMPE2403] = &stmpe2403,
+};
+
+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 = stmpe->regs[STMPE_IDX_ISR_MSB];
+ u8 isr[num];
+ int ret;
+ int i;
+
+ 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;
+
+ handle_nested_irq(stmpe->irq_base + line);
+ status &= ~(1 << bit);
+ }
+
+ stmpe_reg_write(stmpe, israddr + i, clear);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static void stmpe_irq_lock(unsigned int irq)
+{
+ struct stmpe *stmpe = get_irq_chip_data(irq);
+
+ mutex_lock(&stmpe->irq_lock);
+}
+
+static void stmpe_irq_sync_unlock(unsigned int irq)
+{
+ struct stmpe *stmpe = get_irq_chip_data(irq);
+ 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(unsigned int irq)
+{
+ struct stmpe *stmpe = get_irq_chip_data(irq);
+ int offset = irq - stmpe->irq_base;
+ int regoffset = offset / 8;
+ int mask = 1 << (offset % 8);
+
+ stmpe->ier[regoffset] &= ~mask;
+}
+
+static void stmpe_irq_unmask(unsigned int irq)
+{
+ struct stmpe *stmpe = get_irq_chip_data(irq);
+ int offset = irq - stmpe->irq_base;
+ int regoffset = offset / 8;
+ int mask = 1 << (offset % 8);
+
+ stmpe->ier[regoffset] |= mask;
+}
+
+static struct irq_chip stmpe_irq_chip = {
+ .name = "stmpe",
+ .bus_lock = stmpe_irq_lock,
+ .bus_sync_unlock = stmpe_irq_sync_unlock,
+ .mask = stmpe_irq_mask,
+ .unmask = stmpe_irq_unmask,
+};
+
+static int __devinit stmpe_irq_init(struct stmpe *stmpe)
+{
+ int num_irqs = stmpe->variant->num_irqs;
+ int base = stmpe->irq_base;
+ int irq;
+
+ for (irq = base; irq < base + num_irqs; irq++) {
+ set_irq_chip_data(irq, stmpe);
+ set_irq_chip_and_handler(irq, &stmpe_irq_chip,
+ handle_edge_irq);
+ set_irq_nested_thread(irq, 1);
+#ifdef CONFIG_ARM
+ set_irq_flags(irq, IRQF_VALID);
+#else
+ set_irq_noprobe(irq);
+#endif
+ }
+
+ return 0;
+}
+
+static void stmpe_irq_remove(struct stmpe *stmpe)
+{
+ int num_irqs = stmpe->variant->num_irqs;
+ int base = stmpe->irq_base;
+ int irq;
+
+ for (irq = base; irq < base + num_irqs; irq++) {
+#ifdef CONFIG_ARM
+ set_irq_flags(irq, 0);
+#endif
+ set_irq_chip_and_handler(irq, NULL, NULL);
+ set_irq_chip_data(irq, NULL);
+ }
+}
+
+static int __devinit stmpe_chip_init(struct stmpe *stmpe)
+{
+ unsigned int irq_trigger = stmpe->pdata->irq_trigger;
+ struct stmpe_variant_info *variant = stmpe->variant;
+ u8 icr = STMPE_ICR_LSB_GIM;
+ 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 (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)
+ icr |= STMPE_ICR_LSB_HIGH;
+
+ if (stmpe->pdata->irq_invert_polarity)
+ icr ^= STMPE_ICR_LSB_HIGH;
+
+ return stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_ICR_LSB], icr);
+}
+
+static int __devinit stmpe_add_device(struct stmpe *stmpe,
+ struct mfd_cell *cell, int irq)
+{
+ return mfd_add_devices(stmpe->dev, stmpe->pdata->id, cell, 1,
+ NULL, stmpe->irq_base + irq);
+}
+
+static int __devinit 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;
+
+ for (i = 0; i < variant->num_blocks; i++) {
+ struct stmpe_variant_block *block = &variant->blocks[i];
+
+ if (!(platform_blocks & block->block))
+ continue;
+
+ platform_blocks &= ~block->block;
+ ret = stmpe_add_device(stmpe, block->cell, block->irq);
+ if (ret)
+ return ret;
+ }
+
+ if (platform_blocks)
+ dev_warn(stmpe->dev,
+ "platform wants blocks (%#x) not present on variant",
+ platform_blocks);
+
+ return ret;
+}
+
+static int __devinit stmpe_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct stmpe_platform_data *pdata = i2c->dev.platform_data;
+ struct stmpe *stmpe;
+ int ret;
+
+ if (!pdata)
+ return -EINVAL;
+
+ stmpe = kzalloc(sizeof(struct stmpe), GFP_KERNEL);
+ if (!stmpe)
+ return -ENOMEM;
+
+ mutex_init(&stmpe->irq_lock);
+ mutex_init(&stmpe->lock);
+
+ stmpe->dev = &i2c->dev;
+ stmpe->i2c = i2c;
+
+ stmpe->pdata = pdata;
+ stmpe->irq_base = pdata->irq_base;
+
+ stmpe->partnum = id->driver_data;
+ stmpe->variant = stmpe_variant_info[stmpe->partnum];
+ stmpe->regs = stmpe->variant->regs;
+ stmpe->num_gpios = stmpe->variant->num_gpios;
+
+ i2c_set_clientdata(i2c, stmpe);
+
+ ret = stmpe_chip_init(stmpe);
+ if (ret)
+ goto out_free;
+
+ ret = stmpe_irq_init(stmpe);
+ if (ret)
+ goto out_free;
+
+ ret = request_threaded_irq(stmpe->i2c->irq, NULL, stmpe_irq,
+ pdata->irq_trigger | IRQF_ONESHOT,
+ "stmpe", stmpe);
+ if (ret) {
+ dev_err(stmpe->dev, "failed to request IRQ: %d\n", ret);
+ goto out_removeirq;
+ }
+
+ ret = stmpe_devices_init(stmpe);
+ if (ret) {
+ dev_err(stmpe->dev, "failed to add children\n");
+ goto out_removedevs;
+ }
+
+ return 0;
+
+out_removedevs:
+ mfd_remove_devices(stmpe->dev);
+ free_irq(stmpe->i2c->irq, stmpe);
+out_removeirq:
+ stmpe_irq_remove(stmpe);
+out_free:
+ kfree(stmpe);
+ return ret;
+}
+
+static int __devexit stmpe_remove(struct i2c_client *client)
+{
+ struct stmpe *stmpe = i2c_get_clientdata(client);
+
+ mfd_remove_devices(stmpe->dev);
+
+ free_irq(stmpe->i2c->irq, stmpe);
+ stmpe_irq_remove(stmpe);
+
+ kfree(stmpe);
+
+ return 0;
+}
+
+static const struct i2c_device_id stmpe_id[] = {
+ { "stmpe811", STMPE811 },
+ { "stmpe1601", STMPE1601 },
+ { "stmpe2401", STMPE2401 },
+ { "stmpe2403", STMPE2403 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, stmpe_id);
+
+static struct i2c_driver stmpe_driver = {
+ .driver.name = "stmpe",
+ .driver.owner = THIS_MODULE,
+ .probe = stmpe_probe,
+ .remove = __devexit_p(stmpe_remove),
+ .id_table = stmpe_id,
+};
+
+static int __init stmpe_init(void)
+{
+ return i2c_add_driver(&stmpe_driver);
+}
+subsys_initcall(stmpe_init);
+
+static void __exit stmpe_exit(void)
+{
+ i2c_del_driver(&stmpe_driver);
+}
+module_exit(stmpe_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("STMPE MFD core driver");
+MODULE_AUTHOR("Rabin Vincent <rabin.vincent@...ricsson.com>");
diff --git a/drivers/mfd/stmpe.h b/drivers/mfd/stmpe.h
new file mode 100644
index 0000000..991f0ec
--- /dev/null
+++ b/drivers/mfd/stmpe.h
@@ -0,0 +1,176 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License Terms: GNU General Public License, version 2
+ * Author: Rabin Vincent <rabin.vincent@...ricsson.com> for ST-Ericsson
+ */
+
+#ifndef __STMPE_H
+#define __STMPE_H
+
+#ifdef STMPE_DUMP_BYTES
+static inline void stmpe_dump_bytes(const char *str, const void *buf,
+ size_t len)
+{
+ print_hex_dump_bytes(str, DUMP_PREFIX_OFFSET, buf, len);
+}
+#else
+static inline void stmpe_dump_bytes(const char *str, const void *buf,
+ size_t len)
+{
+}
+#endif
+
+/**
+ * struct stmpe_variant_block - information about block
+ * @cell: base mfd cell
+ * @irq: interrupt number to be added to each IORESOURCE_IRQ
+ * in the cell
+ * @block: block id; used for identification with platform data and for
+ * enable and altfunc callbacks
+ */
+struct stmpe_variant_block {
+ struct mfd_cell *cell;
+ int irq;
+ enum stmpe_block block;
+};
+
+/**
+ * struct stmpe_variant_info - variant-specific information
+ * @name: part name
+ * @id_val: content of CHIPID register
+ * @id_mask: bits valid in CHIPID register for comparison with id_val
+ * @num_gpios: number of GPIOS
+ * @af_bits: number of bits used to specify the alternate function
+ * @blocks: list of blocks present on this device
+ * @num_blocks: number of blocks present on this device
+ * @num_irqs: number of internal IRQs available on this device
+ * @enable: callback to enable the specified blocks.
+ * Called with the I/O lock held.
+ * @get_altfunc: callback to get the alternate function number for the
+ * specific block
+ */
+struct stmpe_variant_info {
+ const char *name;
+ u16 id_val;
+ u16 id_mask;
+ int num_gpios;
+ int af_bits;
+ const u8 *regs;
+ struct stmpe_variant_block *blocks;
+ int num_blocks;
+ int num_irqs;
+ int (*enable)(struct stmpe *stmpe, unsigned int blocks, bool enable);
+ int (*get_altfunc)(struct stmpe *stmpe, enum stmpe_block block);
+};
+
+#define STMPE_ICR_LSB_HIGH (1 << 2)
+#define STMPE_ICR_LSB_EDGE (1 << 1)
+#define STMPE_ICR_LSB_GIM (1 << 0)
+
+/*
+ * STMPE811
+ */
+
+#define STMPE811_IRQ_TOUCH_DET 0
+#define STMPE811_IRQ_FIFO_TH 1
+#define STMPE811_IRQ_FIFO_OFLOW 2
+#define STMPE811_IRQ_FIFO_FULL 3
+#define STMPE811_IRQ_FIFO_EMPTY 4
+#define STMPE811_IRQ_TEMP_SENS 5
+#define STMPE811_IRQ_ADC 6
+#define STMPE811_IRQ_GPIOC 7
+#define STMPE811_NR_INTERNAL_IRQS 8
+
+#define STMPE811_REG_CHIP_ID 0x00
+#define STMPE811_REG_SYS_CTRL2 0x04
+#define STMPE811_REG_INT_CTRL 0x09
+#define STMPE811_REG_INT_EN 0x0A
+#define STMPE811_REG_INT_STA 0x0B
+#define STMPE811_REG_GPIO_INT_EN 0x0C
+#define STMPE811_REG_GPIO_INT_STA 0x0D
+#define STMPE811_REG_GPIO_SET_PIN 0x10
+#define STMPE811_REG_GPIO_CLR_PIN 0x11
+#define STMPE811_REG_GPIO_MP_STA 0x12
+#define STMPE811_REG_GPIO_DIR 0x13
+#define STMPE811_REG_GPIO_ED 0x14
+#define STMPE811_REG_GPIO_RE 0x15
+#define STMPE811_REG_GPIO_FE 0x16
+#define STMPE811_REG_GPIO_AF 0x17
+
+#define STMPE811_SYS_CTRL2_ADC_OFF (1 << 0)
+#define STMPE811_SYS_CTRL2_TSC_OFF (1 << 1)
+#define STMPE811_SYS_CTRL2_GPIO_OFF (1 << 2)
+#define STMPE811_SYS_CTRL2_TS_OFF (1 << 3)
+
+/*
+ * STMPE1601
+ */
+
+#define STMPE1601_IRQ_GPIOC 8
+#define STMPE1601_IRQ_PWM3 7
+#define STMPE1601_IRQ_PWM2 6
+#define STMPE1601_IRQ_PWM1 5
+#define STMPE1601_IRQ_PWM0 4
+#define STMPE1601_IRQ_KEYPAD_OVER 2
+#define STMPE1601_IRQ_KEYPAD 1
+#define STMPE1601_IRQ_WAKEUP 0
+#define STMPE1601_NR_INTERNAL_IRQS 9
+
+#define STMPE1601_REG_SYS_CTRL 0x02
+#define STMPE1601_REG_ICR_LSB 0x11
+#define STMPE1601_REG_IER_LSB 0x13
+#define STMPE1601_REG_ISR_MSB 0x14
+#define STMPE1601_REG_CHIP_ID 0x80
+#define STMPE1601_REG_INT_EN_GPIO_MASK_LSB 0x17
+#define STMPE1601_REG_INT_STA_GPIO_MSB 0x18
+#define STMPE1601_REG_GPIO_MP_LSB 0x87
+#define STMPE1601_REG_GPIO_SET_LSB 0x83
+#define STMPE1601_REG_GPIO_CLR_LSB 0x85
+#define STMPE1601_REG_GPIO_SET_DIR_LSB 0x89
+#define STMPE1601_REG_GPIO_ED_MSB 0x8A
+#define STMPE1601_REG_GPIO_RE_LSB 0x8D
+#define STMPE1601_REG_GPIO_FE_LSB 0x8F
+#define STMPE1601_REG_GPIO_AF_U_MSB 0x92
+
+#define STMPE1601_SYS_CTRL_ENABLE_GPIO (1 << 3)
+#define STMPE1601_SYS_CTRL_ENABLE_KPC (1 << 1)
+#define STMPE1601_SYSCON_ENABLE_SPWM (1 << 0)
+
+/*
+ * STMPE24xx
+ */
+
+#define STMPE24XX_IRQ_GPIOC 8
+#define STMPE24XX_IRQ_PWM2 7
+#define STMPE24XX_IRQ_PWM1 6
+#define STMPE24XX_IRQ_PWM0 5
+#define STMPE24XX_IRQ_ROT_OVER 4
+#define STMPE24XX_IRQ_ROT 3
+#define STMPE24XX_IRQ_KEYPAD_OVER 2
+#define STMPE24XX_IRQ_KEYPAD 1
+#define STMPE24XX_IRQ_WAKEUP 0
+#define STMPE24XX_NR_INTERNAL_IRQS 9
+
+#define STMPE24XX_REG_SYS_CTRL 0x02
+#define STMPE24XX_REG_ICR_LSB 0x11
+#define STMPE24XX_REG_IER_LSB 0x13
+#define STMPE24XX_REG_ISR_MSB 0x14
+#define STMPE24XX_REG_CHIP_ID 0x80
+#define STMPE24XX_REG_IEGPIOR_LSB 0x18
+#define STMPE24XX_REG_ISGPIOR_MSB 0x19
+#define STMPE24XX_REG_GPMR_LSB 0xA5
+#define STMPE24XX_REG_GPSR_LSB 0x85
+#define STMPE24XX_REG_GPCR_LSB 0x88
+#define STMPE24XX_REG_GPDR_LSB 0x8B
+#define STMPE24XX_REG_GPEDR_MSB 0x8C
+#define STMPE24XX_REG_GPRER_LSB 0x91
+#define STMPE24XX_REG_GPFER_LSB 0x94
+#define STMPE24XX_REG_GPAFR_U_MSB 0x9B
+
+#define STMPE24XX_SYS_CTRL_ENABLE_GPIO (1 << 3)
+#define STMPE24XX_SYSCON_ENABLE_PWM (1 << 2)
+#define STMPE24XX_SYS_CTRL_ENABLE_KPC (1 << 1)
+#define STMPE24XX_SYSCON_ENABLE_ROT (1 << 0)
+
+#endif
diff --git a/include/linux/mfd/stmpe.h b/include/linux/mfd/stmpe.h
new file mode 100644
index 0000000..ad10c7b
--- /dev/null
+++ b/include/linux/mfd/stmpe.h
@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License Terms: GNU General Public License, version 2
+ * Author: Rabin Vincent <rabin.vincent@...ricsson.com> for ST-Ericsson
+ */
+
+#ifndef __LINUX_MFD_STMPE_H
+#define __LINUX_MFD_STMPE_H
+
+#include <linux/device.h>
+
+enum stmpe_block {
+ STMPE_BLOCK_GPIO = 1 << 0,
+ STMPE_BLOCK_KEYPAD = 1 << 1,
+ STMPE_BLOCK_TOUCHSCREEN = 1 << 2,
+ STMPE_BLOCK_ADC = 1 << 3,
+ STMPE_BLOCK_PWM = 1 << 4,
+ STMPE_BLOCK_ROTATOR = 1 << 5,
+};
+
+enum stmpe_partnum {
+ STMPE811,
+ STMPE1601,
+ STMPE2401,
+ STMPE2403,
+};
+
+/*
+ * For registers whose locations differ on variants, the correct address is
+ * obtained by indexing stmpe->regs with one of the following.
+ */
+enum {
+ STMPE_IDX_CHIP_ID,
+ STMPE_IDX_ICR_LSB,
+ STMPE_IDX_IER_LSB,
+ STMPE_IDX_ISR_MSB,
+ STMPE_IDX_GPMR_LSB,
+ STMPE_IDX_GPSR_LSB,
+ STMPE_IDX_GPCR_LSB,
+ STMPE_IDX_GPDR_LSB,
+ STMPE_IDX_GPEDR_MSB,
+ STMPE_IDX_GPRER_LSB,
+ STMPE_IDX_GPFER_LSB,
+ STMPE_IDX_GPAFR_U_MSB,
+ STMPE_IDX_IEGPIOR_LSB,
+ STMPE_IDX_ISGPIOR_MSB,
+ STMPE_IDX_MAX,
+};
+
+
+struct stmpe_variant_info;
+
+/**
+ * struct stmpe - STMPE MFD structure
+ * @lock: lock protecting I/O operations
+ * @irq_lock: IRQ bus lock
+ * @dev: device, mostly for dev_dbg()
+ * @i2c: i2c client
+ * @variant: the detected STMPE model number
+ * @regs: list of addresses of registers which are at different addresses on
+ * different variants. Indexed by one of STMPE_IDX_*.
+ * @irq_base: starting IRQ number for internal IRQs
+ * @num_gpios: number of gpios, differs for variants
+ * @ier: cache of IER registers for bus_lock
+ * @oldier: cache of IER registers for bus_lock
+ * @pdata: platform data
+ */
+struct stmpe {
+ struct mutex lock;
+ struct mutex irq_lock;
+ struct device *dev;
+ struct i2c_client *i2c;
+ enum stmpe_partnum partnum;
+ struct stmpe_variant_info *variant;
+ const u8 *regs;
+
+ int irq_base;
+ int num_gpios;
+ u8 ier[2];
+ u8 oldier[2];
+ struct stmpe_platform_data *pdata;
+};
+
+extern int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 data);
+extern int stmpe_reg_read(struct stmpe *stmpe, u8 reg);
+extern int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length,
+ u8 *values);
+extern int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
+ const u8 *values);
+extern int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val);
+extern int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins,
+ enum stmpe_block block);
+extern int stmpe_enable(struct stmpe *stmpe, unsigned int blocks);
+extern int stmpe_disable(struct stmpe *stmpe, unsigned int blocks);
+
+struct matrix_keymap_data;
+
+/**
+ * struct stmpe_keypad_platform_data - STMPE keypad platform data
+ * @keymap_data: key map table and size
+ * @debounce_ms: debounce interval, in ms. Maximum is
+ * %STMPE_KEYPAD_MAX_DEBOUNCE.
+ * @scan_count: number of key scanning cycles to confirm key data.
+ * Maximum is %STMPE_KEYPAD_MAX_SCAN_COUNT.
+ * @no_autorepeat: disable key autorepeat
+ */
+struct stmpe_keypad_platform_data {
+ struct matrix_keymap_data *keymap_data;
+ unsigned int debounce_ms;
+ unsigned int scan_count;
+ bool no_autorepeat;
+};
+
+/**
+ * struct stmpe_gpio_platform_data - STMPE GPIO platform data
+ * @gpio_base: first gpio number assigned. A maximum of
+ * %STMPE_NR_GPIOS GPIOs will be allocated.
+ */
+struct stmpe_gpio_platform_data {
+ int gpio_base;
+ void (*setup)(struct stmpe *stmpe, unsigned gpio_base);
+ void (*remove)(struct stmpe *stmpe, unsigned gpio_base);
+};
+
+/**
+ * struct stmpe_platform_data - STMPE platform data
+ * @id: device id to distinguish between multiple STMPEs on the same board
+ * @blocks: bitmask of blocks to enable (use STMPE_BLOCK_*)
+ * @irq_trigger: IRQ trigger to use for the interrupt to the host
+ * @irq_invert_polarity: IRQ line is connected with reversed polarity
+ * @irq_base: base IRQ number. %STMPE_NR_IRQS irqs will be used, or
+ * %STMPE_NR_INTERNAL_IRQS if the GPIO driver is not used.
+ * @gpio: GPIO-specific platform data
+ * @keypad: keypad-specific platform data
+ */
+struct stmpe_platform_data {
+ int id;
+ unsigned int blocks;
+ int irq_base;
+ unsigned int irq_trigger;
+ bool irq_invert_polarity;
+
+ struct stmpe_gpio_platform_data *gpio;
+ struct stmpe_keypad_platform_data *keypad;
+};
+
+#define STMPE_NR_INTERNAL_IRQS 9
+#define STMPE_INT_GPIO(x) (STMPE_NR_INTERNAL_IRQS + (x))
+
+#define STMPE_NR_GPIOS 24
+#define STMPE_NR_IRQS STMPE_INT_GPIO(STMPE_NR_GPIOS)
+
+#endif
--
1.7.0
--
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