98 lines
3.0 KiB
Diff
98 lines
3.0 KiB
Diff
From: Ondrej Jirman <megous@megous.com>
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Date: Sun, 25 Apr 2021 03:16:42 +0200
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Subject: input: goodix: Add option to power off the controller during suspend
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For whatever reason the controller is not suspended on Pinephone
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by the default procedure. It consumes quite a bit of power (~40mW)
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during system sleep, and more when the screen is touched.
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Let's power off the controller during system sleep instead.
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Signed-off-by: Ondrej Jirman <megous@megous.com>
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---
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drivers/input/touchscreen/goodix.c | 37 +++++++++++++++++++++++++++++++++++++
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drivers/input/touchscreen/goodix.h | 1 +
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2 files changed, 38 insertions(+)
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diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
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index b5cc917..90a3584 100644
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--- a/drivers/input/touchscreen/goodix.c
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+++ b/drivers/input/touchscreen/goodix.c
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@@ -1133,6 +1133,7 @@ static void goodix_disable_regulators(void *arg)
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static int goodix_ts_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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+ struct device_node *np = client->dev.of_node;
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struct goodix_ts_data *ts;
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const char *cfg_name;
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int error;
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@@ -1152,6 +1153,7 @@ static int goodix_ts_probe(struct i2c_client *client,
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i2c_set_clientdata(client, ts);
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init_completion(&ts->firmware_loading_complete);
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ts->contact_size = GOODIX_CONTACT_SIZE;
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+ ts->poweroff_in_suspend = of_property_read_bool(np, "poweroff-in-suspend");
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error = goodix_get_gpio_config(ts);
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if (error)
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@@ -1261,6 +1263,15 @@ static int __maybe_unused goodix_suspend(struct device *dev)
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if (ts->load_cfg_from_disk)
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wait_for_completion(&ts->firmware_loading_complete);
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+ if (ts->poweroff_in_suspend) {
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+ goodix_free_irq(ts);
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+ goodix_irq_direction_output(ts, 0);
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+ gpiod_direction_output(ts->gpiod_rst, 0);
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+ regulator_disable(ts->avdd28);
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+ regulator_disable(ts->vddio);
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+ return 0;
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+ }
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+
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/* We need gpio pins to suspend/resume */
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if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) {
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disable_irq(client->irq);
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@@ -1306,6 +1317,32 @@ static int __maybe_unused goodix_resume(struct device *dev)
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u8 config_ver;
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int error;
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+ if (ts->poweroff_in_suspend) {
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+ error = regulator_enable(ts->avdd28);
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+ if (error) {
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+ dev_err(dev, "Regulator avdd28 enable failed.\n");
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+ return error;
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+ }
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+
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+ error = regulator_enable(ts->vddio);
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+ if (error) {
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+ dev_err(dev, "Regulator vddio enable failed.\n");
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+ return error;
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+ }
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+
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+ error = goodix_reset(ts);
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+ if (error) {
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+ dev_err(dev, "Controller reset failed.\n");
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+ return error;
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+ }
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+
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+ error = goodix_request_irq(ts);
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+ if (error)
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+ return error;
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+
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+ return 0;
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+ }
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+
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if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) {
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enable_irq(client->irq);
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return 0;
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diff --git a/drivers/input/touchscreen/goodix.h b/drivers/input/touchscreen/goodix.h
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index 62138f9..3bb51ea 100644
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--- a/drivers/input/touchscreen/goodix.h
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+++ b/drivers/input/touchscreen/goodix.h
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@@ -101,6 +101,7 @@ struct goodix_ts_data {
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u8 main_clk[GOODIX_MAIN_CLK_LEN];
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int bak_ref_len;
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u8 *bak_ref;
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+ bool poweroff_in_suspend;
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};
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int goodix_i2c_read(struct i2c_client *client, u16 reg, u8 *buf, int len);
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