diff options
Diffstat (limited to 'target/linux/generic/backport-5.10/842-v5.15-leds-pca955x-implement-the-default-state-property.patch')
-rw-r--r-- | target/linux/generic/backport-5.10/842-v5.15-leds-pca955x-implement-the-default-state-property.patch | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/target/linux/generic/backport-5.10/842-v5.15-leds-pca955x-implement-the-default-state-property.patch b/target/linux/generic/backport-5.10/842-v5.15-leds-pca955x-implement-the-default-state-property.patch deleted file mode 100644 index 8c79eb1b67..0000000000 --- a/target/linux/generic/backport-5.10/842-v5.15-leds-pca955x-implement-the-default-state-property.patch +++ /dev/null @@ -1,117 +0,0 @@ -From e46cb6d0c760a5b15e38138845fad99628fafcb8 Mon Sep 17 00:00:00 2001 -From: Eddie James <eajames@linux.ibm.com> -Date: Fri, 16 Jul 2021 17:03:29 -0500 -Subject: [PATCH] leds: pca955x: Implement the default-state property - -In order to retain the LED state after a system reboot, check the -documented default-state device tree property during initialization. -Modify the behavior of the probe according to the property. - -Signed-off-by: Eddie James <eajames@linux.ibm.com> -Signed-off-by: Pavel Machek <pavel@ucw.cz> ---- - drivers/leds/leds-pca955x.c | 54 +++++++++++++++++++++++++++++++------ - 1 file changed, 46 insertions(+), 8 deletions(-) - ---- a/drivers/leds/leds-pca955x.c -+++ b/drivers/leds/leds-pca955x.c -@@ -129,6 +129,7 @@ struct pca955x_led { - int led_num; /* 0 .. 15 potentially */ - char name[32]; - u32 type; -+ int default_state; - const char *default_trigger; - }; - -@@ -439,6 +440,7 @@ pca955x_get_pdata(struct i2c_client *cli - - device_for_each_child_node(&client->dev, child) { - const char *name; -+ const char *state; - u32 reg; - int res; - -@@ -457,6 +459,18 @@ pca955x_get_pdata(struct i2c_client *cli - fwnode_property_read_u32(child, "type", &led->type); - fwnode_property_read_string(child, "linux,default-trigger", - &led->default_trigger); -+ -+ if (!fwnode_property_read_string(child, "default-state", -+ &state)) { -+ if (!strcmp(state, "keep")) -+ led->default_state = LEDS_GPIO_DEFSTATE_KEEP; -+ else if (!strcmp(state, "on")) -+ led->default_state = LEDS_GPIO_DEFSTATE_ON; -+ else -+ led->default_state = LEDS_GPIO_DEFSTATE_OFF; -+ } else { -+ led->default_state = LEDS_GPIO_DEFSTATE_OFF; -+ } - } - - pdata->num_leds = chip->bits; -@@ -485,6 +499,7 @@ static int pca955x_probe(struct i2c_clie - int i, err; - struct pca955x_platform_data *pdata; - int ngpios = 0; -+ bool keep_pwm = false; - - chip = &pca955x_chipdefs[id->driver_data]; - adapter = client->adapter; -@@ -565,14 +580,35 @@ static int pca955x_probe(struct i2c_clie - led->brightness_set_blocking = pca955x_led_set; - led->brightness_get = pca955x_led_get; - -+ if (pdata->leds[i].default_state == -+ LEDS_GPIO_DEFSTATE_OFF) { -+ err = pca955x_led_set(led, LED_OFF); -+ if (err) -+ return err; -+ } else if (pdata->leds[i].default_state == -+ LEDS_GPIO_DEFSTATE_ON) { -+ err = pca955x_led_set(led, LED_FULL); -+ if (err) -+ return err; -+ } -+ - err = devm_led_classdev_register(&client->dev, led); - if (err) - return err; - -- /* Turn off LED */ -- err = pca955x_led_set(led, LED_OFF); -- if (err) -- return err; -+ /* -+ * For default-state == "keep", let the core update the -+ * brightness from the hardware, then check the -+ * brightness to see if it's using PWM1. If so, PWM1 -+ * should not be written below. -+ */ -+ if (pdata->leds[i].default_state == -+ LEDS_GPIO_DEFSTATE_KEEP) { -+ if (led->brightness != LED_FULL && -+ led->brightness != LED_OFF && -+ led->brightness != LED_HALF) -+ keep_pwm = true; -+ } - } - } - -@@ -581,10 +617,12 @@ static int pca955x_probe(struct i2c_clie - if (err) - return err; - -- /* PWM1 is used for variable brightness, default to OFF */ -- err = pca955x_write_pwm(client, 1, 0); -- if (err) -- return err; -+ if (!keep_pwm) { -+ /* PWM1 is used for variable brightness, default to OFF */ -+ err = pca955x_write_pwm(client, 1, 0); -+ if (err) -+ return err; -+ } - - /* Set to fast frequency so we do not see flashing */ - err = pca955x_write_psc(client, 0, 0); |