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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.patch117
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);