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https://github.com/torvalds/linux
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mach-ux500: add ST-UIB platform data
The ST-UIB contains a matrix keypad interfaced with the STMPE1601 port expander and a ROHM BU2101 touch panel. Signed-off-by: Sundar Iyer <sundar.iyer@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Sundar Iyer
Linus Walleij
parent
705e098444
commit
0c24352ead
2 changed files with 184 additions and 0 deletions
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@ -6,9 +6,192 @@
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/mfd/stmpe.h>
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#include <linux/input/bu21013.h>
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#include <linux/gpio.h>
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#include <linux/interrupt.h>
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#include <linux/i2c.h>
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#include <linux/input/matrix_keypad.h>
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#include "board-mop500.h"
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/* STMPE/SKE keypad use this key layout */
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static const unsigned int mop500_keymap[] = {
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KEY(2, 5, KEY_END),
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KEY(4, 1, KEY_POWER),
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KEY(3, 5, KEY_VOLUMEDOWN),
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KEY(1, 3, KEY_3),
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KEY(5, 2, KEY_RIGHT),
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KEY(5, 0, KEY_9),
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KEY(0, 5, KEY_MENU),
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KEY(7, 6, KEY_ENTER),
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KEY(4, 5, KEY_0),
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KEY(6, 7, KEY_2),
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KEY(3, 4, KEY_UP),
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KEY(3, 3, KEY_DOWN),
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KEY(6, 4, KEY_SEND),
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KEY(6, 2, KEY_BACK),
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KEY(4, 2, KEY_VOLUMEUP),
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KEY(5, 5, KEY_1),
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KEY(4, 3, KEY_LEFT),
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KEY(3, 2, KEY_7),
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};
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static const struct matrix_keymap_data mop500_keymap_data = {
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.keymap = mop500_keymap,
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.keymap_size = ARRAY_SIZE(mop500_keymap),
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};
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/*
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* STMPE1601
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*/
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static struct stmpe_keypad_platform_data stmpe1601_keypad_data = {
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.debounce_ms = 64,
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.scan_count = 8,
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.no_autorepeat = true,
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.keymap_data = &mop500_keymap_data,
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};
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static struct stmpe_platform_data stmpe1601_data = {
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.id = 1,
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.blocks = STMPE_BLOCK_KEYPAD,
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.irq_trigger = IRQF_TRIGGER_FALLING,
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.irq_base = MOP500_STMPE1601_IRQ(0),
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.keypad = &stmpe1601_keypad_data,
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.autosleep = true,
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.autosleep_timeout = 1024,
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};
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static struct i2c_board_info __initdata mop500_i2c0_devices_stuib[] = {
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{
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I2C_BOARD_INFO("stmpe1601", 0x40),
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.irq = NOMADIK_GPIO_TO_IRQ(218),
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.platform_data = &stmpe1601_data,
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.flags = I2C_CLIENT_WAKE,
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},
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};
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/*
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* BU21013 ROHM touchscreen interface on the STUIBs
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*/
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/* tracks number of bu21013 devices being enabled */
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static int bu21013_devices;
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#define TOUCH_GPIO_PIN 84
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#define TOUCH_XMAX 384
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#define TOUCH_YMAX 704
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#define PRCMU_CLOCK_OCR 0x1CC
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#define TSC_EXT_CLOCK_9_6MHZ 0x840000
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/**
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* bu21013_gpio_board_init : configures the touch panel.
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* @reset_pin: reset pin number
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* This function can be used to configures
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* the voltage and reset the touch panel controller.
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*/
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static int bu21013_gpio_board_init(int reset_pin)
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{
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int retval = 0;
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bu21013_devices++;
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if (bu21013_devices == 1) {
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retval = gpio_request(reset_pin, "touchp_reset");
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if (retval) {
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printk(KERN_ERR "Unable to request gpio reset_pin");
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return retval;
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}
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retval = gpio_direction_output(reset_pin, 1);
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if (retval < 0) {
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printk(KERN_ERR "%s: gpio direction failed\n",
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__func__);
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return retval;
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}
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}
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return retval;
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}
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/**
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* bu21013_gpio_board_exit : deconfigures the touch panel controller
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* @reset_pin: reset pin number
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* This function can be used to deconfigures the chip selection
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* for touch panel controller.
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*/
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static int bu21013_gpio_board_exit(int reset_pin)
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{
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int retval = 0;
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if (bu21013_devices == 1) {
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retval = gpio_direction_output(reset_pin, 0);
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if (retval < 0) {
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printk(KERN_ERR "%s: gpio direction failed\n",
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__func__);
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return retval;
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}
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gpio_set_value(reset_pin, 0);
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}
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bu21013_devices--;
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return retval;
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}
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/**
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* bu21013_read_pin_val : get the interrupt pin value
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* This function can be used to get the interrupt pin value for touch panel
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* controller.
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*/
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static int bu21013_read_pin_val(void)
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{
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return gpio_get_value(TOUCH_GPIO_PIN);
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}
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static struct bu21013_platform_device tsc_plat_device = {
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.cs_en = bu21013_gpio_board_init,
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.cs_dis = bu21013_gpio_board_exit,
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.irq_read_val = bu21013_read_pin_val,
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.irq = NOMADIK_GPIO_TO_IRQ(TOUCH_GPIO_PIN),
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.cs_pin = GPIO_BU21013_CS,
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.touch_x_max = TOUCH_XMAX,
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.touch_y_max = TOUCH_YMAX,
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.ext_clk = false,
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.x_flip = false,
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.y_flip = true,
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};
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static struct bu21013_platform_device tsc_plat2_device = {
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.cs_en = bu21013_gpio_board_init,
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.cs_dis = bu21013_gpio_board_exit,
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.irq_read_val = bu21013_read_pin_val,
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.irq = NOMADIK_GPIO_TO_IRQ(TOUCH_GPIO_PIN),
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.cs_pin = GPIO_BU21013_CS,
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.touch_x_max = TOUCH_XMAX,
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.touch_y_max = TOUCH_YMAX,
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.ext_clk = false,
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.x_flip = false,
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.y_flip = true,
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};
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static struct i2c_board_info __initdata u8500_i2c3_devices_stuib[] = {
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{
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I2C_BOARD_INFO("bu21013_tp", 0x5C),
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.platform_data = &tsc_plat_device,
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},
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{
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I2C_BOARD_INFO("bu21013_tp", 0x5D),
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.platform_data = &tsc_plat2_device,
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},
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};
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void __init mop500_stuib_init(void)
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{
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mop500_uib_i2c_add(0, mop500_i2c0_devices_stuib,
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ARRAY_SIZE(mop500_i2c0_devices_stuib));
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mop500_uib_i2c_add(3, u8500_i2c3_devices_stuib,
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ARRAY_SIZE(u8500_i2c3_devices_stuib));
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}
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@ -11,6 +11,7 @@
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/* GPIOs on the TC35892 expander */
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#define GPIO_SDMMC_CD MOP500_EGPIO(3)
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#define GPIO_BU21013_CS MOP500_EGPIO(13)
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#define GPIO_SDMMC_EN MOP500_EGPIO(17)
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#define GPIO_SDMMC_1V8_3V_SEL MOP500_EGPIO(18)
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