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input: ft5336: add suspend and resume support

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Add power management support to ft5336. The chip can go to hibernate and
reduce power consumption to a minimum, the only way to wake it up though
is by pulsing the reset or wake signal. Only reset is implemented in the
driver right now so only allow this functionality if the reset pin is
defined.

Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
This commit is contained in:
Fabio Baltieri 2023-12-08 01:05:44 +00:00 committed by Fabio Baltieri
parent c7e3ccd51a
commit c0b103bfb1
1 changed files with 78 additions and 12 deletions
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90
drivers/input/input_ft5336.c
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@ -11,6 +11,8 @@
#include <zephyr/drivers/gpio.h>
#include <zephyr/drivers/i2c.h>
#include <zephyr/input/input.h>
#include <zephyr/pm/device.h>
#include <zephyr/pm/device_runtime.h>
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(ft5336, CONFIG_INPUT_LOG_LEVEL);
@ -18,6 +20,7 @@ LOG_MODULE_REGISTER(ft5336, CONFIG_INPUT_LOG_LEVEL);
/* FT5336 used registers */
#define REG_TD_STATUS 0x02U
#define REG_P1_XH 0x03U
#define REG_G_PMODE 0xA5U
/* REG_TD_STATUS: Touch points. */
#define TOUCH_POINTS_POS 0U
@ -35,6 +38,9 @@ LOG_MODULE_REGISTER(ft5336, CONFIG_INPUT_LOG_LEVEL);
/* REG_Pn_XH: Position */
#define POSITION_H_MSK 0x0FU
/* REG_G_PMODE: Power Consume Mode */
#define PMOD_HIBERNATE 0x03U
/** FT5336 configuration (DT). */
struct ft5336_config {
/** I2C bus. */
@ -173,7 +179,6 @@ static int ft5336_init(const struct device *dev)
}
#ifdef CONFIG_INPUT_FT5336_INTERRUPT
if (!gpio_is_ready_dt(&config->int_gpio)) {
LOG_ERR("Interrupt GPIO controller device not ready");
return -ENODEV;
@ -204,19 +209,80 @@ static int ft5336_init(const struct device *dev)
k_timer_start(&data->timer, K_MSEC(CONFIG_INPUT_FT5336_PERIOD),
K_MSEC(CONFIG_INPUT_FT5336_PERIOD));
#endif
r = pm_device_runtime_enable(dev);
if (r < 0 && r != -ENOTSUP) {
LOG_ERR("Failed to enable runtime power management");
return r;
}
return 0;
}
#define FT5336_INIT(index) \
static const struct ft5336_config ft5336_config_##index = { \
.bus = I2C_DT_SPEC_INST_GET(index), \
.reset_gpio = GPIO_DT_SPEC_INST_GET_OR(index, reset_gpios, {0}), \
IF_ENABLED(CONFIG_INPUT_FT5336_INTERRUPT, \
(.int_gpio = GPIO_DT_SPEC_INST_GET(index, int_gpios),)) \
}; \
static struct ft5336_data ft5336_data_##index; \
DEVICE_DT_INST_DEFINE(index, ft5336_init, NULL, \
&ft5336_data_##index, &ft5336_config_##index, \
POST_KERNEL, CONFIG_INPUT_INIT_PRIORITY, NULL);
#ifdef CONFIG_PM_DEVICE
static int ft5336_pm_action(const struct device *dev,
enum pm_device_action action)
{
const struct ft5336_config *config = dev->config;
#ifndef CONFIG_INPUT_FT5336_INTERRUPT
struct ft5336_data *data = dev->data;
#endif
int ret;
if (config->reset_gpio.port == NULL) {
return -ENOTSUP;
}
switch (action) {
case PM_DEVICE_ACTION_SUSPEND:
ret = i2c_reg_write_byte_dt(&config->bus,
REG_G_PMODE, PMOD_HIBERNATE);
if (ret < 0) {
return ret;
}
#ifndef CONFIG_INPUT_FT5336_INTERRUPT
k_timer_stop(&data->timer);
#endif
break;
case PM_DEVICE_ACTION_RESUME:
ret = gpio_pin_set_dt(&config->reset_gpio, 1);
if (ret < 0) {
return ret;
}
k_sleep(K_MSEC(5));
ret = gpio_pin_set_dt(&config->reset_gpio, 0);
if (ret < 0) {
return ret;
}
#ifndef CONFIG_INPUT_FT5336_INTERRUPT
k_timer_start(&data->timer,
K_MSEC(CONFIG_INPUT_FT5336_PERIOD),
K_MSEC(CONFIG_INPUT_FT5336_PERIOD));
#endif
break;
default:
return -ENOTSUP;
}
return 0;
}
#endif
#define FT5336_INIT(index) \
PM_DEVICE_DT_INST_DEFINE(n, ft5336_pm_action); \
static const struct ft5336_config ft5336_config_##index = { \
.bus = I2C_DT_SPEC_INST_GET(index), \
.reset_gpio = GPIO_DT_SPEC_INST_GET_OR(index, reset_gpios, {0}), \
IF_ENABLED(CONFIG_INPUT_FT5336_INTERRUPT, \
(.int_gpio = GPIO_DT_SPEC_INST_GET(index, int_gpios),)) \
}; \
static struct ft5336_data ft5336_data_##index; \
DEVICE_DT_INST_DEFINE(index, ft5336_init, PM_DEVICE_DT_INST_GET(n), \
&ft5336_data_##index, &ft5336_config_##index, \
POST_KERNEL, CONFIG_INPUT_INIT_PRIORITY, NULL);
DT_INST_FOREACH_STATUS_OKAY(FT5336_INIT)