[openwrt/openwrt] kernel: add upstream patches for pca955x led driver
LEDE Commits
lede-commits at lists.infradead.org
Sun Jun 19 03:41:05 PDT 2022
chunkeey pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/78ecaebdff78378b0c9b081ac9beae29a69dbf69
commit 78ecaebdff78378b0c9b081ac9beae29a69dbf69
Author: Chris Blake <chrisrblake93 at gmail.com>
AuthorDate: Mon Feb 14 18:54:02 2022 -0600
kernel: add upstream patches for pca955x led driver
These patches are to support the pca955x led with OpenWRT correctly via
device tree on linux 5.10. Without these, the new LED function/color/reg
features can not be used.
Signed-off-by: Chris Blake <chrisrblake93 at gmail.com>
---
....15-leds-pca955x-clean-up-code-formatting.patch | 178 +++++++++++++++++++++
...-leds-pca955x-add-brightness-get-function.patch | 83 ++++++++++
...955x-implement-the-default-state-property.patch | 119 ++++++++++++++
...s-pca955x-let-the-core-process-the-fwnode.patch | 138 ++++++++++++++++
...5.15-leds-pca955x-switch-to-i2c-probe-new.patch | 64 ++++++++
5 files changed, 582 insertions(+)
diff --git a/target/linux/generic/backport-5.10/840-v5.15-leds-pca955x-clean-up-code-formatting.patch b/target/linux/generic/backport-5.10/840-v5.15-leds-pca955x-clean-up-code-formatting.patch
new file mode 100644
index 0000000000..41199dd93e
--- /dev/null
+++ b/target/linux/generic/backport-5.10/840-v5.15-leds-pca955x-clean-up-code-formatting.patch
@@ -0,0 +1,178 @@
+From 2420ae02ce0a926819ebe18f809a57bff3edeac2 Mon Sep 17 00:00:00 2001
+From: Eddie James <eajames at linux.ibm.com>
+Date: Fri, 16 Jul 2021 17:03:27 -0500
+Subject: [PATCH] leds: pca955x: Clean up code formatting
+
+Format the code. Add some variables to help shorten lines.
+
+Signed-off-by: Eddie James <eajames at linux.ibm.com>
+Signed-off-by: Pavel Machek <pavel at ucw.cz>
+---
+ drivers/leds/leds-pca955x.c | 63 ++++++++++++++++++-------------------
+ 1 file changed, 30 insertions(+), 33 deletions(-)
+
+diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
+index 7087ca4592fc96..f0d841cb59fcc8 100644
+--- a/drivers/leds/leds-pca955x.c
++++ b/drivers/leds/leds-pca955x.c
+@@ -166,11 +166,10 @@ static inline u8 pca955x_ledsel(u8 oldval, int led_num, int state)
+ static int pca955x_write_psc(struct i2c_client *client, int n, u8 val)
+ {
+ struct pca955x *pca955x = i2c_get_clientdata(client);
++ u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + (2 * n);
+ int ret;
+
+- ret = i2c_smbus_write_byte_data(client,
+- pca95xx_num_input_regs(pca955x->chipdef->bits) + 2*n,
+- val);
++ ret = i2c_smbus_write_byte_data(client, cmd, val);
+ if (ret < 0)
+ dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n",
+ __func__, n, val, ret);
+@@ -187,11 +186,10 @@ static int pca955x_write_psc(struct i2c_client *client, int n, u8 val)
+ static int pca955x_write_pwm(struct i2c_client *client, int n, u8 val)
+ {
+ struct pca955x *pca955x = i2c_get_clientdata(client);
++ u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + 1 + (2 * n);
+ int ret;
+
+- ret = i2c_smbus_write_byte_data(client,
+- pca95xx_num_input_regs(pca955x->chipdef->bits) + 1 + 2*n,
+- val);
++ ret = i2c_smbus_write_byte_data(client, cmd, val);
+ if (ret < 0)
+ dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n",
+ __func__, n, val, ret);
+@@ -205,11 +203,10 @@ static int pca955x_write_pwm(struct i2c_client *client, int n, u8 val)
+ static int pca955x_write_ls(struct i2c_client *client, int n, u8 val)
+ {
+ struct pca955x *pca955x = i2c_get_clientdata(client);
++ u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + 4 + n;
+ int ret;
+
+- ret = i2c_smbus_write_byte_data(client,
+- pca95xx_num_input_regs(pca955x->chipdef->bits) + 4 + n,
+- val);
++ ret = i2c_smbus_write_byte_data(client, cmd, val);
+ if (ret < 0)
+ dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n",
+ __func__, n, val, ret);
+@@ -223,10 +220,10 @@ static int pca955x_write_ls(struct i2c_client *client, int n, u8 val)
+ static int pca955x_read_ls(struct i2c_client *client, int n, u8 *val)
+ {
+ struct pca955x *pca955x = i2c_get_clientdata(client);
++ u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + 4 + n;
+ int ret;
+
+- ret = i2c_smbus_read_byte_data(client,
+- pca95xx_num_input_regs(pca955x->chipdef->bits) + 4 + n);
++ ret = i2c_smbus_read_byte_data(client, cmd);
+ if (ret < 0) {
+ dev_err(&client->dev, "%s: reg 0x%x, err %d\n",
+ __func__, n, ret);
+@@ -371,6 +368,7 @@ static struct pca955x_platform_data *
+ pca955x_get_pdata(struct i2c_client *client, struct pca955x_chipdef *chip)
+ {
+ struct pca955x_platform_data *pdata;
++ struct pca955x_led *led;
+ struct fwnode_handle *child;
+ int count;
+
+@@ -401,13 +399,13 @@ pca955x_get_pdata(struct i2c_client *client, struct pca955x_chipdef *chip)
+ if ((res != 0) && is_of_node(child))
+ name = to_of_node(child)->name;
+
+- snprintf(pdata->leds[reg].name, sizeof(pdata->leds[reg].name),
+- "%s", name);
++ led = &pdata->leds[reg];
++ snprintf(led->name, sizeof(led->name), "%s", name);
+
+- pdata->leds[reg].type = PCA955X_TYPE_LED;
+- fwnode_property_read_u32(child, "type", &pdata->leds[reg].type);
++ led->type = PCA955X_TYPE_LED;
++ fwnode_property_read_u32(child, "type", &led->type);
+ fwnode_property_read_string(child, "linux,default-trigger",
+- &pdata->leds[reg].default_trigger);
++ &led->default_trigger);
+ }
+
+ pdata->num_leds = chip->bits;
+@@ -426,11 +424,12 @@ static const struct of_device_id of_pca955x_match[] = {
+ MODULE_DEVICE_TABLE(of, of_pca955x_match);
+
+ static int pca955x_probe(struct i2c_client *client,
+- const struct i2c_device_id *id)
++ const struct i2c_device_id *id)
+ {
+ struct pca955x *pca955x;
+ struct pca955x_led *pca955x_led;
+ struct pca955x_chipdef *chip;
++ struct led_classdev *led;
+ struct i2c_adapter *adapter;
+ int i, err;
+ struct pca955x_platform_data *pdata;
+@@ -449,13 +448,13 @@ static int pca955x_probe(struct i2c_client *client,
+ if ((client->addr & ~((1 << chip->slv_addr_shift) - 1)) !=
+ chip->slv_addr) {
+ dev_err(&client->dev, "invalid slave address %02x\n",
+- client->addr);
++ client->addr);
+ return -ENODEV;
+ }
+
+ dev_info(&client->dev, "leds-pca955x: Using %s %d-bit LED driver at "
+- "slave address 0x%02x\n",
+- client->name, chip->bits, client->addr);
++ "slave address 0x%02x\n", client->name, chip->bits,
++ client->addr);
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -EIO;
+@@ -471,8 +470,8 @@ static int pca955x_probe(struct i2c_client *client,
+ if (!pca955x)
+ return -ENOMEM;
+
+- pca955x->leds = devm_kcalloc(&client->dev,
+- chip->bits, sizeof(*pca955x_led), GFP_KERNEL);
++ pca955x->leds = devm_kcalloc(&client->dev, chip->bits,
++ sizeof(*pca955x_led), GFP_KERNEL);
+ if (!pca955x->leds)
+ return -ENOMEM;
+
+@@ -501,27 +500,25 @@ static int pca955x_probe(struct i2c_client *client,
+ */
+ if (pdata->leds[i].name[0] == '\0')
+ snprintf(pdata->leds[i].name,
+- sizeof(pdata->leds[i].name), "%d", i);
++ sizeof(pdata->leds[i].name), "%d", i);
+
+- snprintf(pca955x_led->name,
+- sizeof(pca955x_led->name), "pca955x:%s",
+- pdata->leds[i].name);
++ snprintf(pca955x_led->name, sizeof(pca955x_led->name),
++ "pca955x:%s", pdata->leds[i].name);
+
++ led = &pca955x_led->led_cdev;
+ if (pdata->leds[i].default_trigger)
+- pca955x_led->led_cdev.default_trigger =
++ led->default_trigger =
+ pdata->leds[i].default_trigger;
+
+- pca955x_led->led_cdev.name = pca955x_led->name;
+- pca955x_led->led_cdev.brightness_set_blocking =
+- pca955x_led_set;
++ led->name = pca955x_led->name;
++ led->brightness_set_blocking = pca955x_led_set;
+
+- err = devm_led_classdev_register(&client->dev,
+- &pca955x_led->led_cdev);
++ err = devm_led_classdev_register(&client->dev, led);
+ if (err)
+ return err;
+
+ /* Turn off LED */
+- err = pca955x_led_set(&pca955x_led->led_cdev, LED_OFF);
++ err = pca955x_led_set(led, LED_OFF);
+ if (err)
+ return err;
+ }
diff --git a/target/linux/generic/backport-5.10/841-v5.15-leds-pca955x-add-brightness-get-function.patch b/target/linux/generic/backport-5.10/841-v5.15-leds-pca955x-add-brightness-get-function.patch
new file mode 100644
index 0000000000..c3344be4fd
--- /dev/null
+++ b/target/linux/generic/backport-5.10/841-v5.15-leds-pca955x-add-brightness-get-function.patch
@@ -0,0 +1,83 @@
+From 7086625fde6538b2c0623eb767ad23c7ac3d7f3a Mon Sep 17 00:00:00 2001
+From: Eddie James <eajames at linux.ibm.com>
+Date: Fri, 16 Jul 2021 17:03:28 -0500
+Subject: [PATCH] leds: pca955x: Add brightness_get function
+
+Add a function to fetch the state of the hardware LED.
+
+Signed-off-by: Eddie James <eajames at linux.ibm.com>
+Signed-off-by: Pavel Machek <pavel at ucw.cz>
+---
+ drivers/leds/leds-pca955x.c | 52 +++++++++++++++++++++++++++++++++++++
+ 1 file changed, 52 insertions(+)
+
+diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
+index f0d841cb59fcc8..e47ba7c3b7c7d8 100644
+--- a/drivers/leds/leds-pca955x.c
++++ b/drivers/leds/leds-pca955x.c
+@@ -233,6 +233,57 @@ static int pca955x_read_ls(struct i2c_client *client, int n, u8 *val)
+ return 0;
+ }
+
++static int pca955x_read_pwm(struct i2c_client *client, int n, u8 *val)
++{
++ struct pca955x *pca955x = i2c_get_clientdata(client);
++ u8 cmd = pca95xx_num_input_regs(pca955x->chipdef->bits) + 1 + (2 * n);
++ int ret;
++
++ ret = i2c_smbus_read_byte_data(client, cmd);
++ if (ret < 0) {
++ dev_err(&client->dev, "%s: reg 0x%x, err %d\n",
++ __func__, n, ret);
++ return ret;
++ }
++ *val = (u8)ret;
++ return 0;
++}
++
++static enum led_brightness pca955x_led_get(struct led_classdev *led_cdev)
++{
++ struct pca955x_led *pca955x_led = container_of(led_cdev,
++ struct pca955x_led,
++ led_cdev);
++ struct pca955x *pca955x = pca955x_led->pca955x;
++ u8 ls, pwm;
++ int ret;
++
++ ret = pca955x_read_ls(pca955x->client, pca955x_led->led_num / 4, &ls);
++ if (ret)
++ return ret;
++
++ ls = (ls >> ((pca955x_led->led_num % 4) << 1)) & 0x3;
++ switch (ls) {
++ case PCA955X_LS_LED_ON:
++ ret = LED_FULL;
++ break;
++ case PCA955X_LS_LED_OFF:
++ ret = LED_OFF;
++ break;
++ case PCA955X_LS_BLINK0:
++ ret = LED_HALF;
++ break;
++ case PCA955X_LS_BLINK1:
++ ret = pca955x_read_pwm(pca955x->client, 1, &pwm);
++ if (ret)
++ return ret;
++ ret = 255 - pwm;
++ break;
++ }
++
++ return ret;
++}
++
+ static int pca955x_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+ {
+@@ -512,6 +563,7 @@ static int pca955x_probe(struct i2c_client *client,
+
+ led->name = pca955x_led->name;
+ led->brightness_set_blocking = pca955x_led_set;
++ led->brightness_get = pca955x_led_get;
+
+ err = devm_led_classdev_register(&client->dev, led);
+ if (err)
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
new file mode 100644
index 0000000000..055801f096
--- /dev/null
+++ b/target/linux/generic/backport-5.10/842-v5.15-leds-pca955x-implement-the-default-state-property.patch
@@ -0,0 +1,119 @@
+From e46cb6d0c760a5b15e38138845fad99628fafcb8 Mon Sep 17 00:00:00 2001
+From: Eddie James <eajames at 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 at linux.ibm.com>
+Signed-off-by: Pavel Machek <pavel at ucw.cz>
+---
+ drivers/leds/leds-pca955x.c | 54 +++++++++++++++++++++++++++++++------
+ 1 file changed, 46 insertions(+), 8 deletions(-)
+
+diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
+index e47ba7c3b7c7d8..fa1d77d86ef67b 100644
+--- 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 *client, struct pca955x_chipdef *chip)
+
+ 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 *client, struct pca955x_chipdef *chip)
+ 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_client *client,
+ 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_client *client,
+ 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_client *client,
+ 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);
diff --git a/target/linux/generic/backport-5.10/843-v5.15-leds-pca955x-let-the-core-process-the-fwnode.patch b/target/linux/generic/backport-5.10/843-v5.15-leds-pca955x-let-the-core-process-the-fwnode.patch
new file mode 100644
index 0000000000..7a091d9716
--- /dev/null
+++ b/target/linux/generic/backport-5.10/843-v5.15-leds-pca955x-let-the-core-process-the-fwnode.patch
@@ -0,0 +1,138 @@
+From 7c4815929276b2e223eb6f2e49afe5071d4294a5 Mon Sep 17 00:00:00 2001
+From: Eddie James <eajames at linux.ibm.com>
+Date: Fri, 16 Jul 2021 17:03:30 -0500
+Subject: [PATCH] leds: pca955x: Let the core process the fwnode
+
+Much of the fwnode processing in the PCA955x driver is now in the
+LEDs core driver, so pass the fwnode in the init data when
+registering the LED device. In order to preserve the existing naming
+scheme, check for an empty name and set it to the LED number.
+
+Signed-off-by: Eddie James <eajames at linux.ibm.com>
+Signed-off-by: Pavel Machek <pavel at ucw.cz>
+---
+ drivers/leds/leds-pca955x.c | 58 +++++++++++++++++++------------------
+ 1 file changed, 30 insertions(+), 28 deletions(-)
+
+diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
+index fa1d77d86ef67b..a6aa4b9abde8c4 100644
+--- a/drivers/leds/leds-pca955x.c
++++ b/drivers/leds/leds-pca955x.c
+@@ -127,10 +127,9 @@ struct pca955x_led {
+ struct pca955x *pca955x;
+ struct led_classdev led_cdev;
+ int led_num; /* 0 .. 15 potentially */
+- char name[32];
+ u32 type;
+ int default_state;
+- const char *default_trigger;
++ struct fwnode_handle *fwnode;
+ };
+
+ struct pca955x_platform_data {
+@@ -439,7 +438,6 @@ pca955x_get_pdata(struct i2c_client *client, struct pca955x_chipdef *chip)
+ return ERR_PTR(-ENOMEM);
+
+ device_for_each_child_node(&client->dev, child) {
+- const char *name;
+ const char *state;
+ u32 reg;
+ int res;
+@@ -448,17 +446,10 @@ pca955x_get_pdata(struct i2c_client *client, struct pca955x_chipdef *chip)
+ if ((res != 0) || (reg >= chip->bits))
+ continue;
+
+- res = fwnode_property_read_string(child, "label", &name);
+- if ((res != 0) && is_of_node(child))
+- name = to_of_node(child)->name;
+-
+ led = &pdata->leds[reg];
+- snprintf(led->name, sizeof(led->name), "%s", name);
+-
+ led->type = PCA955X_TYPE_LED;
++ led->fwnode = child;
+ 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)) {
+@@ -495,11 +486,14 @@ static int pca955x_probe(struct i2c_client *client,
+ struct pca955x_led *pca955x_led;
+ struct pca955x_chipdef *chip;
+ struct led_classdev *led;
++ struct led_init_data init_data;
+ struct i2c_adapter *adapter;
+ int i, err;
+ struct pca955x_platform_data *pdata;
+ int ngpios = 0;
++ bool set_default_label = false;
+ bool keep_pwm = false;
++ char default_label[8];
+
+ chip = &pca955x_chipdefs[id->driver_data];
+ adapter = client->adapter;
+@@ -547,6 +541,9 @@ static int pca955x_probe(struct i2c_client *client,
+ pca955x->client = client;
+ pca955x->chipdef = chip;
+
++ init_data.devname_mandatory = false;
++ init_data.devicename = "pca955x";
++
+ for (i = 0; i < chip->bits; i++) {
+ pca955x_led = &pca955x->leds[i];
+ pca955x_led->led_num = i;
+@@ -560,23 +557,7 @@ static int pca955x_probe(struct i2c_client *client,
+ ngpios++;
+ break;
+ case PCA955X_TYPE_LED:
+- /*
+- * Platform data can specify LED names and
+- * default triggers
+- */
+- if (pdata->leds[i].name[0] == '\0')
+- snprintf(pdata->leds[i].name,
+- sizeof(pdata->leds[i].name), "%d", i);
+-
+- snprintf(pca955x_led->name, sizeof(pca955x_led->name),
+- "pca955x:%s", pdata->leds[i].name);
+-
+ led = &pca955x_led->led_cdev;
+- if (pdata->leds[i].default_trigger)
+- led->default_trigger =
+- pdata->leds[i].default_trigger;
+-
+- led->name = pca955x_led->name;
+ led->brightness_set_blocking = pca955x_led_set;
+ led->brightness_get = pca955x_led_get;
+
+@@ -592,7 +573,28 @@ static int pca955x_probe(struct i2c_client *client,
+ return err;
+ }
+
+- err = devm_led_classdev_register(&client->dev, led);
++ init_data.fwnode = pdata->leds[i].fwnode;
++
++ if (is_of_node(init_data.fwnode)) {
++ if (to_of_node(init_data.fwnode)->name[0] ==
++ '\0')
++ set_default_label = true;
++ else
++ set_default_label = false;
++ } else {
++ set_default_label = true;
++ }
++
++ if (set_default_label) {
++ snprintf(default_label, sizeof(default_label),
++ "%d", i);
++ init_data.default_label = default_label;
++ } else {
++ init_data.default_label = NULL;
++ }
++
++ err = devm_led_classdev_register_ext(&client->dev, led,
++ &init_data);
+ if (err)
+ return err;
+
diff --git a/target/linux/generic/backport-5.10/844-v5.15-leds-pca955x-switch-to-i2c-probe-new.patch b/target/linux/generic/backport-5.10/844-v5.15-leds-pca955x-switch-to-i2c-probe-new.patch
new file mode 100644
index 0000000000..77ac4e7dc9
--- /dev/null
+++ b/target/linux/generic/backport-5.10/844-v5.15-leds-pca955x-switch-to-i2c-probe-new.patch
@@ -0,0 +1,64 @@
+From 239f32b4f161c1584cd4b386d6ab8766432a6ede Mon Sep 17 00:00:00 2001
+From: Eddie James <eajames at linux.ibm.com>
+Date: Fri, 16 Jul 2021 17:03:31 -0500
+Subject: [PATCH] leds: pca955x: Switch to i2c probe_new
+
+The deprecated i2c probe functionality doesn't work with OF
+compatible strings, as it only checks for the i2c device id. Switch
+to the new way of probing and grab the match data to select the
+chip type.
+
+Signed-off-by: Eddie James <eajames at linux.ibm.com>
+Signed-off-by: Pavel Machek <pavel at ucw.cz>
+---
+ drivers/leds/leds-pca955x.c | 23 +++++++++++++++++++----
+ 1 file changed, 19 insertions(+), 4 deletions(-)
+
+diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
+index a6aa4b9abde8c4..a6b5699aeae4fe 100644
+--- a/drivers/leds/leds-pca955x.c
++++ b/drivers/leds/leds-pca955x.c
+@@ -479,8 +479,7 @@ static const struct of_device_id of_pca955x_match[] = {
+ };
+ MODULE_DEVICE_TABLE(of, of_pca955x_match);
+
+-static int pca955x_probe(struct i2c_client *client,
+- const struct i2c_device_id *id)
++static int pca955x_probe(struct i2c_client *client)
+ {
+ struct pca955x *pca955x;
+ struct pca955x_led *pca955x_led;
+@@ -494,8 +493,24 @@ static int pca955x_probe(struct i2c_client *client,
+ bool set_default_label = false;
+ bool keep_pwm = false;
+ char default_label[8];
++ enum pca955x_type chip_type;
++ const void *md = device_get_match_data(&client->dev);
+
+- chip = &pca955x_chipdefs[id->driver_data];
++ if (md) {
++ chip_type = (enum pca955x_type)md;
++ } else {
++ const struct i2c_device_id *id = i2c_match_id(pca955x_id,
++ client);
++
++ if (id) {
++ chip_type = (enum pca955x_type)id->driver_data;
++ } else {
++ dev_err(&client->dev, "unknown chip\n");
++ return -ENODEV;
++ }
++ }
++
++ chip = &pca955x_chipdefs[chip_type];
+ adapter = client->adapter;
+ pdata = dev_get_platdata(&client->dev);
+ if (!pdata) {
+@@ -670,7 +685,7 @@ static struct i2c_driver pca955x_driver = {
+ .name = "leds-pca955x",
+ .of_match_table = of_pca955x_match,
+ },
+- .probe = pca955x_probe,
++ .probe_new = pca955x_probe,
+ .id_table = pca955x_id,
+ };
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