[PATCH 1/2] w1: w1-gpio: claim the gpio with correct initial flag

[PATCH 1/2] w1: w1-gpio: claim the gpio with correct initial flag

[Eugen Hristev]

gpio_request_by_name should be called with proper flags.
The 0 value flag is invalid, and causes bad initialization of the gpio.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
---
 drivers/w1/w1-gpio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/w1/w1-gpio.c b/drivers/w1/w1-gpio.c
index 3b0ead6f6d..9346f810ce 100644
--- a/drivers/w1/w1-gpio.c
+++ b/drivers/w1/w1-gpio.c
@@ -156,7 +156,7 @@ static int w1_gpio_of_to_plat(struct udevice *dev)
 	struct w1_gpio_pdata *pdata = dev_get_plat(dev);
 	int ret;
 
-	ret = gpio_request_by_name(dev, "gpios", 0, &pdata->gpio, 0);
+	ret = gpio_request_by_name(dev, "gpios", 0, &pdata->gpio, GPIOD_IS_IN);
 	if (ret < 0)
 		printf("Error claiming GPIO %d\n", ret);
 
-- 
2.25.1

[PATCH 2/2] ARM: dts: at91: fix the GPIO polarity for onewire

[Eugen Hristev]

The GPIO polarity for onewire must be GPIO_ACTIVE_HIGH.
On previous versions this used to work as it looks like the right flag values
are being passed since :
https://lists.denx.de/pipermail/u-boot/2020-April/407195.html

And that series broke the old functionality for onewire nodes.
Some boards had the correct value for the polarity, but it wasn't clear
so I replaced it with the right macro for the flag, instead of an empty value.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
---
 arch/arm/dts/at91-sama5d27_som1_ek.dts   | 3 ++-
 arch/arm/dts/at91-sama5d27_wlsom1_ek.dts | 3 ++-
 arch/arm/dts/at91-sama5d2_ptc_ek.dts     | 2 +-
 arch/arm/dts/at91-sama5d2_xplained.dts   | 3 ++-
 arch/arm/dts/at91-sama5d3_xplained.dts   | 2 +-
 arch/arm/dts/at91-sama5d4_xplained.dts   | 2 +-
 arch/arm/dts/sam9x60ek.dts               | 2 +-
 7 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/arch/arm/dts/at91-sama5d27_som1_ek.dts b/arch/arm/dts/at91-sama5d27_som1_ek.dts
index 4cd6db66fe..ee851a1bef 100644
--- a/arch/arm/dts/at91-sama5d27_som1_ek.dts
+++ b/arch/arm/dts/at91-sama5d27_som1_ek.dts
@@ -43,6 +43,7 @@
  *     OTHER DEALINGS IN THE SOFTWARE.
  */
 /dts-v1/;
+#include <dt-bindings/gpio/gpio.h>
 #include "sama5d27_som1.dtsi"
 
 / {
@@ -55,7 +56,7 @@
 	};
 
 	onewire_tm: onewire {
-		gpios = <&pioA 17 0>;
+		gpios = <&pioA 17 GPIO_ACTIVE_HIGH>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_onewire_tm_default>;
 		status = "okay";
diff --git a/arch/arm/dts/at91-sama5d27_wlsom1_ek.dts b/arch/arm/dts/at91-sama5d27_wlsom1_ek.dts
index ab23f5c209..f3f6942143 100644
--- a/arch/arm/dts/at91-sama5d27_wlsom1_ek.dts
+++ b/arch/arm/dts/at91-sama5d27_wlsom1_ek.dts
@@ -7,6 +7,7 @@
  * Author: Nicolas Ferre <nicolas.ferre@microcihp.com>
  */
 /dts-v1/;
+#include <dt-bindings/gpio/gpio.h>
 #include "sama5d27_wlsom1.dtsi"
 
 / {
@@ -18,7 +19,7 @@
 	};
 
 	onewire_tm: onewire {
-		gpios = <&pioA PIN_PC9 0>;
+		gpios = <&pioA PIN_PC9 GPIO_ACTIVE_HIGH>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_onewire_tm_default>;
 		status = "okay";
diff --git a/arch/arm/dts/at91-sama5d2_ptc_ek.dts b/arch/arm/dts/at91-sama5d2_ptc_ek.dts
index 068a117585..cd3711a02a 100644
--- a/arch/arm/dts/at91-sama5d2_ptc_ek.dts
+++ b/arch/arm/dts/at91-sama5d2_ptc_ek.dts
@@ -57,7 +57,7 @@
 	};
 
 	onewire_tm: onewire {
-		gpios = <&pioA PIN_PB31 0>;
+		gpios = <&pioA PIN_PB31 GPIO_ACTIVE_HIGH>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_onewire_tm_default>;
 		status = "okay";
diff --git a/arch/arm/dts/at91-sama5d2_xplained.dts b/arch/arm/dts/at91-sama5d2_xplained.dts
index 7f0d1696ba..b733c4d4ce 100644
--- a/arch/arm/dts/at91-sama5d2_xplained.dts
+++ b/arch/arm/dts/at91-sama5d2_xplained.dts
@@ -1,4 +1,5 @@
 /dts-v1/;
+#include <dt-bindings/gpio/gpio.h>
 #include "sama5d2.dtsi"
 #include "sama5d2-pinfunc.h"
 
@@ -12,7 +13,7 @@
 	};
 
 	onewire_tm: onewire {
-		gpios = <&pioA PIN_PB0 0>;
+		gpios = <&pioA PIN_PB0 GPIO_ACTIVE_HIGH>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_onewire_tm_default>;
 		status = "okay";
diff --git a/arch/arm/dts/at91-sama5d3_xplained.dts b/arch/arm/dts/at91-sama5d3_xplained.dts
index 20fba5f067..fc508002a7 100644
--- a/arch/arm/dts/at91-sama5d3_xplained.dts
+++ b/arch/arm/dts/at91-sama5d3_xplained.dts
@@ -37,7 +37,7 @@
 	};
 
 	onewire_tm: onewire {
-		gpios = <&pioE 23 GPIO_ACTIVE_LOW>;
+		gpios = <&pioE 23 GPIO_ACTIVE_HIGH>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_onewire_tm_default>;
 		status = "okay";
diff --git a/arch/arm/dts/at91-sama5d4_xplained.dts b/arch/arm/dts/at91-sama5d4_xplained.dts
index 7da5086865..74959253dc 100644
--- a/arch/arm/dts/at91-sama5d4_xplained.dts
+++ b/arch/arm/dts/at91-sama5d4_xplained.dts
@@ -59,7 +59,7 @@
 	};
 
 	onewire_tm: onewire {
-		gpios = <&pioE 15 GPIO_ACTIVE_LOW>;
+		gpios = <&pioE 15 GPIO_ACTIVE_HIGH>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_onewire_tm_default>;
 		status = "okay";
diff --git a/arch/arm/dts/sam9x60ek.dts b/arch/arm/dts/sam9x60ek.dts
index 96914b3ea2..77edd593b4 100644
--- a/arch/arm/dts/sam9x60ek.dts
+++ b/arch/arm/dts/sam9x60ek.dts
@@ -29,7 +29,7 @@
 	};
 
 	onewire_tm: onewire {
-		gpios = <&pioD 14 0>;
+		gpios = <&pioD 14 GPIO_ACTIVE_HIGH>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_onewire_tm_default>;
 		status = "okay";
-- 
2.25.1

Re: [PATCH 1/2] w1: w1-gpio: claim the gpio with correct initial flag

[Eugen.Hristev]

On 6/23/21 5:20 PM, Eugen Hristev wrote:
> gpio_request_by_name should be called with proper flags.
> The 0 value flag is invalid, and causes bad initialization of the gpio.
> 
> Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
> ---
>   drivers/w1/w1-gpio.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/w1/w1-gpio.c b/drivers/w1/w1-gpio.c
> index 3b0ead6f6d..9346f810ce 100644
> --- a/drivers/w1/w1-gpio.c
> +++ b/drivers/w1/w1-gpio.c
> @@ -156,7 +156,7 @@ static int w1_gpio_of_to_plat(struct udevice *dev)
>   	struct w1_gpio_pdata *pdata = dev_get_plat(dev);
>   	int ret;
>   
> -	ret = gpio_request_by_name(dev, "gpios", 0, &pdata->gpio, 0);
> +	ret = gpio_request_by_name(dev, "gpios", 0, &pdata->gpio, GPIOD_IS_IN);
>   	if (ret < 0)
>   		printf("Error claiming GPIO %d\n", ret);
>   
> 

Applied both to u-boot-atmel/master