* [PATCH] ARM: dts: at91-sama5d27_som1_ek: Added I2C bus recovery support
@ 2021-09-14 5:21 Durai Manickam KR
2021-09-15 9:05 ` Nicolas Ferre
0 siblings, 1 reply; 2+ messages in thread
From: Durai Manickam KR @ 2021-09-14 5:21 UTC (permalink / raw)
To: robh+dt, nicolas.ferre, alexandre.belloni, ludovic.desroches,
devicetree, linux-arm-kernel, linux-kernel, Hari.PrasathGE
Cc: Durai Manickam KR
SDA and SCL is configured as GPIO for I2C bus to recover during
I2C bus malfunction.
Signed-off-by: Durai Manickam KR <durai.manickamkr@microchip.com>
---
arch/arm/boot/dts/at91-sama5d27_som1.dtsi | 12 ++++++++++-
arch/arm/boot/dts/at91-sama5d27_som1_ek.dts | 23 +++++++++++++++++++--
2 files changed, 32 insertions(+), 3 deletions(-)
diff --git a/arch/arm/boot/dts/at91-sama5d27_som1.dtsi b/arch/arm/boot/dts/at91-sama5d27_som1.dtsi
index e3251f3e3eaa..edce6bcf6cd6 100644
--- a/arch/arm/boot/dts/at91-sama5d27_som1.dtsi
+++ b/arch/arm/boot/dts/at91-sama5d27_som1.dtsi
@@ -8,6 +8,7 @@
*/
#include "sama5d2.dtsi"
#include "sama5d2-pinfunc.h"
+#include <dt-bindings/gpio/gpio.h>
/ {
model = "Atmel SAMA5D27 SoM1";
@@ -95,8 +96,11 @@ ethernet-phy@7 {
i2c0: i2c@f8028000 {
dmas = <0>, <0>;
- pinctrl-names = "default";
+ pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_i2c0_default>;
+ pinctrl-1 = <&pinctrl_i2c0_gpio>;
+ sda-gpios = <&pioA PIN_PD21 GPIO_ACTIVE_HIGH>;
+ scl-gpios = <&pioA PIN_PD22 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
status = "okay";
at24@50 {
@@ -113,6 +117,12 @@ pinctrl_i2c0_default: i2c0_default {
bias-disable;
};
+ pinctrl_i2c0_gpio: i2c0_gpio {
+ pinmux = <PIN_PD21__GPIO>,
+ <PIN_PD22__GPIO>;
+ bias-disable;
+ };
+
pinctrl_qspi1_default: qspi1_default {
sck_cs {
pinmux = <PIN_PB5__QSPI1_SCK>,
diff --git a/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts b/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts
index 614999dcb990..0f10e05d6e23 100644
--- a/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts
+++ b/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts
@@ -131,8 +131,11 @@ i2c3: i2c@600 {
i2c-analog-filter;
i2c-digital-filter;
i2c-digital-filter-width-ns = <35>;
- pinctrl-names = "default";
+ pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_mikrobus_i2c>;
+ pinctrl-1 = <&pinctrl_i2c3_gpio>;
+ sda-gpios = <&pioA PIN_PA24 GPIO_ACTIVE_HIGH>;
+ scl-gpios = <&pioA PIN_PA23 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
status = "okay";
};
};
@@ -216,8 +219,11 @@ i2c1: i2c@fc028000 {
i2c-analog-filter;
i2c-digital-filter;
i2c-digital-filter-width-ns = <35>;
- pinctrl-names = "default";
+ pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_i2c1_default>;
+ pinctrl-1 = <&pinctrl_i2c1_gpio>;
+ sda-gpios = <&pioA PIN_PD4 GPIO_ACTIVE_HIGH>;
+ scl-gpios = <&pioA PIN_PD5 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
status = "okay";
};
@@ -253,6 +259,13 @@ pinctrl_i2c1_default: i2c1_default {
bias-disable;
};
+ pinctrl_i2c1_gpio: i2c1_gpio {
+ pinmux = <PIN_PD4__GPIO>,
+ <PIN_PD5__GPIO>;
+ bias-disable;
+ };
+
+
pinctrl_isc_base: isc_base {
pinmux = <PIN_PC21__ISC_PCK>,
<PIN_PC22__ISC_VSYNC>,
@@ -442,6 +455,12 @@ pinctrl_mikrobus_i2c: mikrobus1_i2c {
bias-disable;
};
+ pinctrl_i2c3_gpio: i2c3_gpio {
+ pinmux = <PIN_PA24__GPIO>,
+ <PIN_PA23__GPIO>;
+ bias-disable;
+ };
+
pinctrl_flx4_default: flx4_uart_default {
pinmux = <PIN_PC28__FLEXCOM4_IO0>,
<PIN_PC29__FLEXCOM4_IO1>,
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] ARM: dts: at91-sama5d27_som1_ek: Added I2C bus recovery support
2021-09-14 5:21 [PATCH] ARM: dts: at91-sama5d27_som1_ek: Added I2C bus recovery support Durai Manickam KR
@ 2021-09-15 9:05 ` Nicolas Ferre
0 siblings, 0 replies; 2+ messages in thread
From: Nicolas Ferre @ 2021-09-15 9:05 UTC (permalink / raw)
To: Durai Manickam KR, robh+dt, alexandre.belloni, ludovic.desroches,
devicetree, linux-arm-kernel, linux-kernel, Hari.PrasathGE
On 14/09/2021 at 07:21, Durai Manickam KR wrote:
> SDA and SCL is configured as GPIO for I2C bus to recover during
> I2C bus malfunction.
>
> Signed-off-by: Durai Manickam KR <durai.manickamkr@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Queued in at91-dt for 5.16.
Thanks Durai, best regards,
Nicolas
> ---
> arch/arm/boot/dts/at91-sama5d27_som1.dtsi | 12 ++++++++++-
> arch/arm/boot/dts/at91-sama5d27_som1_ek.dts | 23 +++++++++++++++++++--
> 2 files changed, 32 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/boot/dts/at91-sama5d27_som1.dtsi b/arch/arm/boot/dts/at91-sama5d27_som1.dtsi
> index e3251f3e3eaa..edce6bcf6cd6 100644
> --- a/arch/arm/boot/dts/at91-sama5d27_som1.dtsi
> +++ b/arch/arm/boot/dts/at91-sama5d27_som1.dtsi
> @@ -8,6 +8,7 @@
> */
> #include "sama5d2.dtsi"
> #include "sama5d2-pinfunc.h"
> +#include <dt-bindings/gpio/gpio.h>
>
> / {
> model = "Atmel SAMA5D27 SoM1";
> @@ -95,8 +96,11 @@ ethernet-phy@7 {
>
> i2c0: i2c@f8028000 {
> dmas = <0>, <0>;
> - pinctrl-names = "default";
> + pinctrl-names = "default", "gpio";
> pinctrl-0 = <&pinctrl_i2c0_default>;
> + pinctrl-1 = <&pinctrl_i2c0_gpio>;
> + sda-gpios = <&pioA PIN_PD21 GPIO_ACTIVE_HIGH>;
> + scl-gpios = <&pioA PIN_PD22 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
> status = "okay";
>
> at24@50 {
> @@ -113,6 +117,12 @@ pinctrl_i2c0_default: i2c0_default {
> bias-disable;
> };
>
> + pinctrl_i2c0_gpio: i2c0_gpio {
> + pinmux = <PIN_PD21__GPIO>,
> + <PIN_PD22__GPIO>;
> + bias-disable;
> + };
> +
> pinctrl_qspi1_default: qspi1_default {
> sck_cs {
> pinmux = <PIN_PB5__QSPI1_SCK>,
> diff --git a/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts b/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts
> index 614999dcb990..0f10e05d6e23 100644
> --- a/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts
> +++ b/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts
> @@ -131,8 +131,11 @@ i2c3: i2c@600 {
> i2c-analog-filter;
> i2c-digital-filter;
> i2c-digital-filter-width-ns = <35>;
> - pinctrl-names = "default";
> + pinctrl-names = "default", "gpio";
> pinctrl-0 = <&pinctrl_mikrobus_i2c>;
> + pinctrl-1 = <&pinctrl_i2c3_gpio>;
> + sda-gpios = <&pioA PIN_PA24 GPIO_ACTIVE_HIGH>;
> + scl-gpios = <&pioA PIN_PA23 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
> status = "okay";
> };
> };
> @@ -216,8 +219,11 @@ i2c1: i2c@fc028000 {
> i2c-analog-filter;
> i2c-digital-filter;
> i2c-digital-filter-width-ns = <35>;
> - pinctrl-names = "default";
> + pinctrl-names = "default", "gpio";
> pinctrl-0 = <&pinctrl_i2c1_default>;
> + pinctrl-1 = <&pinctrl_i2c1_gpio>;
> + sda-gpios = <&pioA PIN_PD4 GPIO_ACTIVE_HIGH>;
> + scl-gpios = <&pioA PIN_PD5 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
> status = "okay";
> };
>
> @@ -253,6 +259,13 @@ pinctrl_i2c1_default: i2c1_default {
> bias-disable;
> };
>
> + pinctrl_i2c1_gpio: i2c1_gpio {
> + pinmux = <PIN_PD4__GPIO>,
> + <PIN_PD5__GPIO>;
> + bias-disable;
> + };
> +
> +
> pinctrl_isc_base: isc_base {
> pinmux = <PIN_PC21__ISC_PCK>,
> <PIN_PC22__ISC_VSYNC>,
> @@ -442,6 +455,12 @@ pinctrl_mikrobus_i2c: mikrobus1_i2c {
> bias-disable;
> };
>
> + pinctrl_i2c3_gpio: i2c3_gpio {
> + pinmux = <PIN_PA24__GPIO>,
> + <PIN_PA23__GPIO>;
> + bias-disable;
> + };
> +
> pinctrl_flx4_default: flx4_uart_default {
> pinmux = <PIN_PC28__FLEXCOM4_IO0>,
> <PIN_PC29__FLEXCOM4_IO1>,
>
--
Nicolas Ferre
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2021-09-15 9:05 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-09-14 5:21 [PATCH] ARM: dts: at91-sama5d27_som1_ek: Added I2C bus recovery support Durai Manickam KR
2021-09-15 9:05 ` Nicolas Ferre
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).