* [PATCH 1/3 v6] gpio: pcf857x: Name instance after dev_name()
@ 2021-07-15 19:11 ` Linus Walleij
0 siblings, 0 replies; 8+ messages in thread
From: Linus Walleij @ 2021-07-15 19:11 UTC (permalink / raw)
To: Sekhar Nori, Bartosz Golaszewski
Cc: linux-arm-kernel, linux-gpio, Linus Walleij
Put the label on this gpio_chip from the dev_name() instead of
the client name.
The client name will be pcf8574 etc for all instances even if
there are several chips on a system.
This manifests on the DaVinci DM6467 (non-devicetree) which
will contain 3 different pcf8574 devices that as a result cannot
be told apart because they are all named "pcf8574", affecting
the GPIO descriptor tables which need a unique label per chip.
By passing in .dev_name in the struct i2c_board_info we can
explicitly name each instance and use that to discern the chips
when using board files.
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v5->v6:
- Rebase on v5.14-rc1
ChangeLog ->v5:
- New patch to deal with the chip label
---
drivers/gpio/gpio-pcf857x.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c
index b7568ee33696..2271ec86e414 100644
--- a/drivers/gpio/gpio-pcf857x.c
+++ b/drivers/gpio/gpio-pcf857x.c
@@ -311,7 +311,7 @@ static int pcf857x_probe(struct i2c_client *client,
if (status < 0)
goto fail;
- gpio->chip.label = client->name;
+ gpio->chip.label = dev_name(&client->dev);
gpio->client = client;
i2c_set_clientdata(client, gpio);
--
2.31.1
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 1/3 v6] gpio: pcf857x: Name instance after dev_name()
@ 2021-07-15 19:11 ` Linus Walleij
0 siblings, 0 replies; 8+ messages in thread
From: Linus Walleij @ 2021-07-15 19:11 UTC (permalink / raw)
To: Sekhar Nori, Bartosz Golaszewski
Cc: linux-arm-kernel, linux-gpio, Linus Walleij
Put the label on this gpio_chip from the dev_name() instead of
the client name.
The client name will be pcf8574 etc for all instances even if
there are several chips on a system.
This manifests on the DaVinci DM6467 (non-devicetree) which
will contain 3 different pcf8574 devices that as a result cannot
be told apart because they are all named "pcf8574", affecting
the GPIO descriptor tables which need a unique label per chip.
By passing in .dev_name in the struct i2c_board_info we can
explicitly name each instance and use that to discern the chips
when using board files.
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v5->v6:
- Rebase on v5.14-rc1
ChangeLog ->v5:
- New patch to deal with the chip label
---
drivers/gpio/gpio-pcf857x.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c
index b7568ee33696..2271ec86e414 100644
--- a/drivers/gpio/gpio-pcf857x.c
+++ b/drivers/gpio/gpio-pcf857x.c
@@ -311,7 +311,7 @@ static int pcf857x_probe(struct i2c_client *client,
if (status < 0)
goto fail;
- gpio->chip.label = client->name;
+ gpio->chip.label = dev_name(&client->dev);
gpio->client = client;
i2c_set_clientdata(client, gpio);
--
2.31.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 2/3 v6] ARM: davinci: dm644x: Convert LEDs to GPIO descriptor table
2021-07-15 19:11 ` Linus Walleij
@ 2021-07-15 19:11 ` Linus Walleij
-1 siblings, 0 replies; 8+ messages in thread
From: Linus Walleij @ 2021-07-15 19:11 UTC (permalink / raw)
To: Sekhar Nori, Bartosz Golaszewski
Cc: linux-arm-kernel, linux-gpio, Linus Walleij
This converts the DaVinci DM644x LEDs to use GPIO
descriptor look-ups.
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v5->v6:
- Rebase on v5.14-rc1
ChangeLog v4->v5:
- Name each I2C expander instance explicitly as "u2" etc.
- Tie the LEDs to the generated "i2c-u2" device name.
ChangeLog v3->v4:
- Rebase on v5.13-rc1
- Resend
- LED maintainers: please apply this patch, it is ACKed by a DaVinci
maintainer
ChangeLog v2->v3:
- Rebase on v5.10-rc1
- Resend
ChangeLog v1->v2:
- Collect Bartosz' review tag
- Rebase on v5.9-rc1
- Resend
---
arch/arm/mach-davinci/board-dm644x-evm.c | 49 ++++++++++++++++--------
1 file changed, 33 insertions(+), 16 deletions(-)
diff --git a/arch/arm/mach-davinci/board-dm644x-evm.c b/arch/arm/mach-davinci/board-dm644x-evm.c
index cce3a621eb20..36d8eea7a342 100644
--- a/arch/arm/mach-davinci/board-dm644x-evm.c
+++ b/arch/arm/mach-davinci/board-dm644x-evm.c
@@ -319,17 +319,14 @@ static struct platform_device rtc_dev = {
/* U2 -- LEDs */
static struct gpio_led evm_leds[] = {
- { .name = "DS8", .active_low = 1,
- .default_trigger = "heartbeat", },
- { .name = "DS7", .active_low = 1, },
- { .name = "DS6", .active_low = 1, },
- { .name = "DS5", .active_low = 1, },
- { .name = "DS4", .active_low = 1, },
- { .name = "DS3", .active_low = 1, },
- { .name = "DS2", .active_low = 1,
- .default_trigger = "mmc0", },
- { .name = "DS1", .active_low = 1,
- .default_trigger = "disk-activity", },
+ { .name = "DS8", .default_trigger = "heartbeat", },
+ { .name = "DS7", },
+ { .name = "DS6", },
+ { .name = "DS5", },
+ { .name = "DS4", },
+ { .name = "DS3", },
+ { .name = "DS2", .default_trigger = "mmc0", },
+ { .name = "DS1", .default_trigger = "disk-activity", },
};
static const struct gpio_led_platform_data evm_led_data = {
@@ -337,18 +334,35 @@ static const struct gpio_led_platform_data evm_led_data = {
.leds = evm_leds,
};
+static struct gpiod_lookup_table evm_leds_gpio_table = {
+ .dev_id = "leds-gpio.0",
+ .table = {
+ /*
+ * These GPIOs are on a PCF8574 GPIO expander, which
+ * is in turn named after the I2C device name. This is
+ * device "u2" on I2C bus 1 with address 0x38.
+ */
+ GPIO_LOOKUP_IDX("i2c-u2", 0, NULL, 0, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 1, NULL, 1, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 2, NULL, 2, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 3, NULL, 3, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 4, NULL, 4, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 5, NULL, 5, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 6, NULL, 6, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 7, NULL, 7, GPIO_ACTIVE_LOW),
+ { },
+ },
+};
+
static struct platform_device *evm_led_dev;
static int
evm_led_setup(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
{
- struct gpio_led *leds = evm_leds;
int status;
- while (ngpio--) {
- leds->gpio = gpio++;
- leds++;
- }
+ /* Add the lookup table */
+ gpiod_add_lookup_table(&evm_leds_gpio_table);
/* what an extremely annoying way to be forced to handle
* device unregistration ...
@@ -639,14 +653,17 @@ static struct i2c_board_info __initdata i2c_info[] = {
},
{
I2C_BOARD_INFO("pcf8574", 0x38),
+ .dev_name = "u2",
.platform_data = &pcf_data_u2,
},
{
I2C_BOARD_INFO("pcf8574", 0x39),
+ .dev_name = "u18",
.platform_data = &pcf_data_u18,
},
{
I2C_BOARD_INFO("pcf8574", 0x3a),
+ .dev_name = "u35",
.platform_data = &pcf_data_u35,
},
{
--
2.31.1
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 2/3 v6] ARM: davinci: dm644x: Convert LEDs to GPIO descriptor table
@ 2021-07-15 19:11 ` Linus Walleij
0 siblings, 0 replies; 8+ messages in thread
From: Linus Walleij @ 2021-07-15 19:11 UTC (permalink / raw)
To: Sekhar Nori, Bartosz Golaszewski
Cc: linux-arm-kernel, linux-gpio, Linus Walleij
This converts the DaVinci DM644x LEDs to use GPIO
descriptor look-ups.
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v5->v6:
- Rebase on v5.14-rc1
ChangeLog v4->v5:
- Name each I2C expander instance explicitly as "u2" etc.
- Tie the LEDs to the generated "i2c-u2" device name.
ChangeLog v3->v4:
- Rebase on v5.13-rc1
- Resend
- LED maintainers: please apply this patch, it is ACKed by a DaVinci
maintainer
ChangeLog v2->v3:
- Rebase on v5.10-rc1
- Resend
ChangeLog v1->v2:
- Collect Bartosz' review tag
- Rebase on v5.9-rc1
- Resend
---
arch/arm/mach-davinci/board-dm644x-evm.c | 49 ++++++++++++++++--------
1 file changed, 33 insertions(+), 16 deletions(-)
diff --git a/arch/arm/mach-davinci/board-dm644x-evm.c b/arch/arm/mach-davinci/board-dm644x-evm.c
index cce3a621eb20..36d8eea7a342 100644
--- a/arch/arm/mach-davinci/board-dm644x-evm.c
+++ b/arch/arm/mach-davinci/board-dm644x-evm.c
@@ -319,17 +319,14 @@ static struct platform_device rtc_dev = {
/* U2 -- LEDs */
static struct gpio_led evm_leds[] = {
- { .name = "DS8", .active_low = 1,
- .default_trigger = "heartbeat", },
- { .name = "DS7", .active_low = 1, },
- { .name = "DS6", .active_low = 1, },
- { .name = "DS5", .active_low = 1, },
- { .name = "DS4", .active_low = 1, },
- { .name = "DS3", .active_low = 1, },
- { .name = "DS2", .active_low = 1,
- .default_trigger = "mmc0", },
- { .name = "DS1", .active_low = 1,
- .default_trigger = "disk-activity", },
+ { .name = "DS8", .default_trigger = "heartbeat", },
+ { .name = "DS7", },
+ { .name = "DS6", },
+ { .name = "DS5", },
+ { .name = "DS4", },
+ { .name = "DS3", },
+ { .name = "DS2", .default_trigger = "mmc0", },
+ { .name = "DS1", .default_trigger = "disk-activity", },
};
static const struct gpio_led_platform_data evm_led_data = {
@@ -337,18 +334,35 @@ static const struct gpio_led_platform_data evm_led_data = {
.leds = evm_leds,
};
+static struct gpiod_lookup_table evm_leds_gpio_table = {
+ .dev_id = "leds-gpio.0",
+ .table = {
+ /*
+ * These GPIOs are on a PCF8574 GPIO expander, which
+ * is in turn named after the I2C device name. This is
+ * device "u2" on I2C bus 1 with address 0x38.
+ */
+ GPIO_LOOKUP_IDX("i2c-u2", 0, NULL, 0, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 1, NULL, 1, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 2, NULL, 2, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 3, NULL, 3, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 4, NULL, 4, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 5, NULL, 5, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 6, NULL, 6, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 7, NULL, 7, GPIO_ACTIVE_LOW),
+ { },
+ },
+};
+
static struct platform_device *evm_led_dev;
static int
evm_led_setup(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
{
- struct gpio_led *leds = evm_leds;
int status;
- while (ngpio--) {
- leds->gpio = gpio++;
- leds++;
- }
+ /* Add the lookup table */
+ gpiod_add_lookup_table(&evm_leds_gpio_table);
/* what an extremely annoying way to be forced to handle
* device unregistration ...
@@ -639,14 +653,17 @@ static struct i2c_board_info __initdata i2c_info[] = {
},
{
I2C_BOARD_INFO("pcf8574", 0x38),
+ .dev_name = "u2",
.platform_data = &pcf_data_u2,
},
{
I2C_BOARD_INFO("pcf8574", 0x39),
+ .dev_name = "u18",
.platform_data = &pcf_data_u18,
},
{
I2C_BOARD_INFO("pcf8574", 0x3a),
+ .dev_name = "u35",
.platform_data = &pcf_data_u35,
},
{
--
2.31.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 3/3 v6] ARM: davinci: dm646x: Convert LEDs to GPIO descriptor table
2021-07-15 19:11 ` Linus Walleij
@ 2021-07-15 19:11 ` Linus Walleij
-1 siblings, 0 replies; 8+ messages in thread
From: Linus Walleij @ 2021-07-15 19:11 UTC (permalink / raw)
To: Sekhar Nori, Bartosz Golaszewski
Cc: linux-arm-kernel, linux-gpio, Linus Walleij
This converts the DaVinci DM646x LEDs to use GPIO
descriptor look-ups.
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v5->v6:
- Rebase on v5.14-rc1
ChangeLog v4->v5:
- Name each I2C expander instance explicitly as "u2" etc.
- Tie the LEDs to the generated "i2c-u2" device name.
ChangeLog v3->v4:
- Rebase on v5.13-rc1
- Resend
- LED maintainers: please apply this patch, it is ACKed by a DaVinci
maintainer
ChangeLog v2->v3:
- Rebase on v5.10-rc1
- Resend
ChangeLog v1->v2:
- Collect Bartosz' review tag
- Rebase on v5.9-rc1
- Resend
---
arch/arm/mach-davinci/board-dm646x-evm.c | 34 +++++++++++++++++-------
1 file changed, 25 insertions(+), 9 deletions(-)
diff --git a/arch/arm/mach-davinci/board-dm646x-evm.c b/arch/arm/mach-davinci/board-dm646x-evm.c
index ee91d81ebbfd..00c074fddce6 100644
--- a/arch/arm/mach-davinci/board-dm646x-evm.c
+++ b/arch/arm/mach-davinci/board-dm646x-evm.c
@@ -20,6 +20,7 @@
#include <linux/init.h>
#include <linux/leds.h>
#include <linux/gpio.h>
+#include <linux/gpio/machine.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/property.h>
@@ -202,10 +203,10 @@ static struct i2c_driver dm6467evm_cpld_driver = {
/* LEDS */
static struct gpio_led evm_leds[] = {
- { .name = "DS1", .active_low = 1, },
- { .name = "DS2", .active_low = 1, },
- { .name = "DS3", .active_low = 1, },
- { .name = "DS4", .active_low = 1, },
+ { .name = "DS1" },
+ { .name = "DS2" },
+ { .name = "DS3" },
+ { .name = "DS4" },
};
static const struct gpio_led_platform_data evm_led_data = {
@@ -213,18 +214,32 @@ static const struct gpio_led_platform_data evm_led_data = {
.leds = evm_leds,
};
+static struct gpiod_lookup_table evm_leds_gpio_table = {
+ .dev_id = "leds-gpio.0",
+ .table = {
+ /*
+ * These GPIOs are on a PCF8574a GPIO expander, which
+ * is in turn named after the I2C device name. This is
+ * device "u2" on I2C bus 1 with address 0x38. These
+ * leds are at offset 4, 5, 6, 7.
+ */
+ GPIO_LOOKUP_IDX("i2c-u2", 4, NULL, 0, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 5, NULL, 1, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 6, NULL, 2, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 7, NULL, 3, GPIO_ACTIVE_LOW),
+ { },
+ },
+};
+
static struct platform_device *evm_led_dev;
static int evm_led_setup(struct i2c_client *client, int gpio,
unsigned int ngpio, void *c)
{
- struct gpio_led *leds = evm_leds;
int status;
- while (ngpio--) {
- leds->gpio = gpio++;
- leds++;
- }
+ /* Add the lookup table */
+ gpiod_add_lookup_table(&evm_leds_gpio_table);
evm_led_dev = platform_device_alloc("leds-gpio", 0);
platform_device_add_data(evm_led_dev, &evm_led_data,
@@ -438,6 +453,7 @@ static struct i2c_board_info __initdata i2c_info[] = {
},
{
I2C_BOARD_INFO("pcf8574a", 0x38),
+ .dev_name = "u2",
.platform_data = &pcf_data,
},
{
--
2.31.1
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 3/3 v6] ARM: davinci: dm646x: Convert LEDs to GPIO descriptor table
@ 2021-07-15 19:11 ` Linus Walleij
0 siblings, 0 replies; 8+ messages in thread
From: Linus Walleij @ 2021-07-15 19:11 UTC (permalink / raw)
To: Sekhar Nori, Bartosz Golaszewski
Cc: linux-arm-kernel, linux-gpio, Linus Walleij
This converts the DaVinci DM646x LEDs to use GPIO
descriptor look-ups.
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v5->v6:
- Rebase on v5.14-rc1
ChangeLog v4->v5:
- Name each I2C expander instance explicitly as "u2" etc.
- Tie the LEDs to the generated "i2c-u2" device name.
ChangeLog v3->v4:
- Rebase on v5.13-rc1
- Resend
- LED maintainers: please apply this patch, it is ACKed by a DaVinci
maintainer
ChangeLog v2->v3:
- Rebase on v5.10-rc1
- Resend
ChangeLog v1->v2:
- Collect Bartosz' review tag
- Rebase on v5.9-rc1
- Resend
---
arch/arm/mach-davinci/board-dm646x-evm.c | 34 +++++++++++++++++-------
1 file changed, 25 insertions(+), 9 deletions(-)
diff --git a/arch/arm/mach-davinci/board-dm646x-evm.c b/arch/arm/mach-davinci/board-dm646x-evm.c
index ee91d81ebbfd..00c074fddce6 100644
--- a/arch/arm/mach-davinci/board-dm646x-evm.c
+++ b/arch/arm/mach-davinci/board-dm646x-evm.c
@@ -20,6 +20,7 @@
#include <linux/init.h>
#include <linux/leds.h>
#include <linux/gpio.h>
+#include <linux/gpio/machine.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/property.h>
@@ -202,10 +203,10 @@ static struct i2c_driver dm6467evm_cpld_driver = {
/* LEDS */
static struct gpio_led evm_leds[] = {
- { .name = "DS1", .active_low = 1, },
- { .name = "DS2", .active_low = 1, },
- { .name = "DS3", .active_low = 1, },
- { .name = "DS4", .active_low = 1, },
+ { .name = "DS1" },
+ { .name = "DS2" },
+ { .name = "DS3" },
+ { .name = "DS4" },
};
static const struct gpio_led_platform_data evm_led_data = {
@@ -213,18 +214,32 @@ static const struct gpio_led_platform_data evm_led_data = {
.leds = evm_leds,
};
+static struct gpiod_lookup_table evm_leds_gpio_table = {
+ .dev_id = "leds-gpio.0",
+ .table = {
+ /*
+ * These GPIOs are on a PCF8574a GPIO expander, which
+ * is in turn named after the I2C device name. This is
+ * device "u2" on I2C bus 1 with address 0x38. These
+ * leds are at offset 4, 5, 6, 7.
+ */
+ GPIO_LOOKUP_IDX("i2c-u2", 4, NULL, 0, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 5, NULL, 1, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 6, NULL, 2, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("i2c-u2", 7, NULL, 3, GPIO_ACTIVE_LOW),
+ { },
+ },
+};
+
static struct platform_device *evm_led_dev;
static int evm_led_setup(struct i2c_client *client, int gpio,
unsigned int ngpio, void *c)
{
- struct gpio_led *leds = evm_leds;
int status;
- while (ngpio--) {
- leds->gpio = gpio++;
- leds++;
- }
+ /* Add the lookup table */
+ gpiod_add_lookup_table(&evm_leds_gpio_table);
evm_led_dev = platform_device_alloc("leds-gpio", 0);
platform_device_add_data(evm_led_dev, &evm_led_data,
@@ -438,6 +453,7 @@ static struct i2c_board_info __initdata i2c_info[] = {
},
{
I2C_BOARD_INFO("pcf8574a", 0x38),
+ .dev_name = "u2",
.platform_data = &pcf_data,
},
{
--
2.31.1
_______________________________________________
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^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH 1/3 v6] gpio: pcf857x: Name instance after dev_name()
2021-07-15 19:11 ` Linus Walleij
@ 2021-07-16 8:14 ` Bartosz Golaszewski
-1 siblings, 0 replies; 8+ messages in thread
From: Bartosz Golaszewski @ 2021-07-16 8:14 UTC (permalink / raw)
To: Linus Walleij; +Cc: Sekhar Nori, arm-soc, linux-gpio
On Thu, Jul 15, 2021 at 9:13 PM Linus Walleij <linus.walleij@linaro.org> wrote:
>
> Put the label on this gpio_chip from the dev_name() instead of
> the client name.
>
> The client name will be pcf8574 etc for all instances even if
> there are several chips on a system.
>
> This manifests on the DaVinci DM6467 (non-devicetree) which
> will contain 3 different pcf8574 devices that as a result cannot
> be told apart because they are all named "pcf8574", affecting
> the GPIO descriptor tables which need a unique label per chip.
>
> By passing in .dev_name in the struct i2c_board_info we can
> explicitly name each instance and use that to discern the chips
> when using board files.
>
> Cc: Sekhar Nori <nsekhar@ti.com>
> Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> ChangeLog v5->v6:
> - Rebase on v5.14-rc1
> ChangeLog ->v5:
> - New patch to deal with the chip label
> ---
> drivers/gpio/gpio-pcf857x.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c
> index b7568ee33696..2271ec86e414 100644
> --- a/drivers/gpio/gpio-pcf857x.c
> +++ b/drivers/gpio/gpio-pcf857x.c
> @@ -311,7 +311,7 @@ static int pcf857x_probe(struct i2c_client *client,
> if (status < 0)
> goto fail;
>
> - gpio->chip.label = client->name;
> + gpio->chip.label = dev_name(&client->dev);
>
> gpio->client = client;
> i2c_set_clientdata(client, gpio);
> --
> 2.31.1
>
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 1/3 v6] gpio: pcf857x: Name instance after dev_name()
@ 2021-07-16 8:14 ` Bartosz Golaszewski
0 siblings, 0 replies; 8+ messages in thread
From: Bartosz Golaszewski @ 2021-07-16 8:14 UTC (permalink / raw)
To: Linus Walleij; +Cc: Sekhar Nori, arm-soc, linux-gpio
On Thu, Jul 15, 2021 at 9:13 PM Linus Walleij <linus.walleij@linaro.org> wrote:
>
> Put the label on this gpio_chip from the dev_name() instead of
> the client name.
>
> The client name will be pcf8574 etc for all instances even if
> there are several chips on a system.
>
> This manifests on the DaVinci DM6467 (non-devicetree) which
> will contain 3 different pcf8574 devices that as a result cannot
> be told apart because they are all named "pcf8574", affecting
> the GPIO descriptor tables which need a unique label per chip.
>
> By passing in .dev_name in the struct i2c_board_info we can
> explicitly name each instance and use that to discern the chips
> when using board files.
>
> Cc: Sekhar Nori <nsekhar@ti.com>
> Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> ChangeLog v5->v6:
> - Rebase on v5.14-rc1
> ChangeLog ->v5:
> - New patch to deal with the chip label
> ---
> drivers/gpio/gpio-pcf857x.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c
> index b7568ee33696..2271ec86e414 100644
> --- a/drivers/gpio/gpio-pcf857x.c
> +++ b/drivers/gpio/gpio-pcf857x.c
> @@ -311,7 +311,7 @@ static int pcf857x_probe(struct i2c_client *client,
> if (status < 0)
> goto fail;
>
> - gpio->chip.label = client->name;
> + gpio->chip.label = dev_name(&client->dev);
>
> gpio->client = client;
> i2c_set_clientdata(client, gpio);
> --
> 2.31.1
>
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
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^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2021-07-16 8:16 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-07-15 19:11 [PATCH 1/3 v6] gpio: pcf857x: Name instance after dev_name() Linus Walleij
2021-07-15 19:11 ` Linus Walleij
2021-07-15 19:11 ` [PATCH 2/3 v6] ARM: davinci: dm644x: Convert LEDs to GPIO descriptor table Linus Walleij
2021-07-15 19:11 ` Linus Walleij
2021-07-15 19:11 ` [PATCH 3/3 v6] ARM: davinci: dm646x: " Linus Walleij
2021-07-15 19:11 ` Linus Walleij
2021-07-16 8:14 ` [PATCH 1/3 v6] gpio: pcf857x: Name instance after dev_name() Bartosz Golaszewski
2021-07-16 8:14 ` Bartosz Golaszewski
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