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drivers: display: st7789v: add power management support

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This adds sleep mode along with power managament control.

Signed-off-by: Albin Söderqvist <albin.soderqvist@endian.se>
This commit is contained in:
Albin Söderqvist 2020-05-07 13:15:50 +02:00 • committed by Carles Cufí
commit 35c4838425
1 changed files with 52 additions and 0 deletions
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52
drivers/display/display_st7789v.c
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@ -3,6 +3,7 @@
* Copyright (c) 2019 Nordic Semiconductor ASA
* Copyright (c) 2019 Marc Reilly
* Copyright (c) 2019 PHYTEC Messtechnik GmbH
* Copyright (c) 2020 Endian Technologies AB
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -51,6 +52,9 @@ struct st7789v_data {
u16_t width;
u16_t x_offset;
u16_t y_offset;
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
u32_t pm_state;
#endif
};
#ifdef CONFIG_ST7789V_RGB565
@ -370,6 +374,10 @@ static int st7789v_init(struct device *dev)
}
#endif
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
data->pm_state = DEVICE_PM_ACTIVE_STATE;
#endif
data->cmd_data_gpio = device_get_binding(
DT_INST_GPIO_LABEL(0, cmd_data_gpios));
if (data->cmd_data_gpio == NULL) {
@ -393,6 +401,44 @@ static int st7789v_init(struct device *dev)
return 0;
}
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
static void st7789v_enter_sleep(struct st7789v_data *data)
{
st7789v_transmit(data, ST7789V_CMD_SLEEP_IN, NULL, 0);
}
static int st7789v_pm_control(struct device *dev, u32_t ctrl_command,
void *context, device_pm_cb cb, void *arg)
{
int ret = 0;
struct st7789v_data *data = (struct st7789v_data *)dev->driver_data;
switch (ctrl_command) {
case DEVICE_PM_SET_POWER_STATE:
if (*((u32_t *)context) == DEVICE_PM_ACTIVE_STATE) {
st7789v_exit_sleep(data);
data->pm_state = DEVICE_PM_ACTIVE_STATE;
ret = 0;
} else {
st7789v_enter_sleep(data);
data->pm_state = DEVICE_PM_LOW_POWER_STATE;
ret = 0;
}
break;
case DEVICE_PM_GET_POWER_STATE:
*((u32_t *)context) = data->pm_state;
break;
default:
ret = -EINVAL;
}
if (cb != NULL) {
cb(dev, ret, context, arg);
}
return ret;
}
#endif /* CONFIG_DEVICE_POWER_MANAGEMENT */
static const struct display_driver_api st7789v_api = {
.blanking_on = st7789v_blanking_on,
.blanking_off = st7789v_blanking_off,
@ -413,6 +459,12 @@ static struct st7789v_data st7789v_data = {
.y_offset = DT_INST_PROP(0, y_offset),
};
#ifndef CONFIG_DEVICE_POWER_MANAGEMENT
DEVICE_AND_API_INIT(st7789v, DT_INST_LABEL(0), &st7789v_init,
&st7789v_data, NULL, APPLICATION,
CONFIG_APPLICATION_INIT_PRIORITY, &st7789v_api);
#else
DEVICE_DEFINE(st7789v, DT_INST_LABEL(0), &st7789v_init,
st7789v_pm_control, &st7789v_data, NULL, APPLICATION,
CONFIG_APPLICATION_INIT_PRIORITY, &st7789v_api);
#endif /* CONFIG_DEVICE_POWER_MANAGEMENT */