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Message-ID: <20200127085713.ykinu5owrxaoly3y@M43218.corp.atmel.com>
Date: Mon, 27 Jan 2020 09:57:13 +0100
From: Ludovic Desroches <ludovic.desroches@...rochip.com>
To: Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>
CC: <linux-i2c@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <kamel.bouhara@...tlin.com>,
<wsa@...-dreams.de>, <Nicolas.Ferre@...rochip.com>,
<alexandre.belloni@...tlin.com>, <robh@...nel.org>,
<peda@...ntia.se>, <linux@...linux.org.uk>
Subject: Re: [PATCH v3 6/6] ARM: at91/dt: sama5d2: add i2c gpio pinctrl
On Wed, Jan 15, 2020 at 01:54:22PM +0200, Codrin Ciubotariu wrote:
> From: Kamel Bouhara <kamel.bouhara@...tlin.com>
>
> Add the i2c gpio pinctrls to support the i2c bus recovery
>
> Signed-off-by: Kamel Bouhara <kamel.bouhara@...tlin.com>
> [codrin.ciubotariu@...rochip.com: removed gpio pull-ups]
> Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@...rochip.com>
> ---
>
> Changes in v3:
> - removed gpio pull-ups;
>
> Changes in v2:
> - new patch;
>
> arch/arm/boot/dts/at91-sama5d2_ptc_ek.dts | 33 +++++++++++++++++++--
> arch/arm/boot/dts/at91-sama5d2_xplained.dts | 33 +++++++++++++++++++--
> 2 files changed, 60 insertions(+), 6 deletions(-)
>
> diff --git a/arch/arm/boot/dts/at91-sama5d2_ptc_ek.dts b/arch/arm/boot/dts/at91-sama5d2_ptc_ek.dts
> index ba7f3e646c26..1c24ac8019ba 100644
> --- a/arch/arm/boot/dts/at91-sama5d2_ptc_ek.dts
> +++ b/arch/arm/boot/dts/at91-sama5d2_ptc_ek.dts
> @@ -180,8 +180,11 @@
>
> i2c0: i2c@...28000 {
> 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>;
> status = "okay";
> };
>
> @@ -198,8 +201,11 @@
> #address-cells = <1>;
> #size-cells = <0>;
> clocks = <&pmc PMC_TYPE_PERIPHERAL 19>;
> - pinctrl-names = "default";
> + pinctrl-names = "default", "gpio";
> pinctrl-0 = <&pinctrl_flx0_default>;
> + pinctrl-1 = <&pinctrl_flx0_gpio>;
> + sda-gpios = <&pioA PIN_PB28 GPIO_ACTIVE_HIGH>;
> + scl-gpios = <&pioA PIN_PB29 GPIO_ACTIVE_HIGH>;
> atmel,fifo-size = <16>;
> status = "okay";
> };
> @@ -226,8 +232,11 @@
>
> i2c1: i2c@...28000 {
> dmas = <0>, <0>;
> - pinctrl-names = "default";
> + pinctrl-names = "default", "gpio";
> pinctrl-0 = <&pinctrl_i2c1_default>;
> + pinctrl-1 = <&pinctrl_i2c1_gpio>;
> + sda-gpios = <&pioA PIN_PC6 GPIO_ACTIVE_HIGH>;
> + scl-gpios = <&pioA PIN_PC7 GPIO_ACTIVE_HIGH>;
> status = "okay";
>
> at24@50 {
> @@ -244,18 +253,36 @@
> bias-disable;
> };
>
> + pinctrl_flx0_gpio: flx0_gpio {
> + pinmux = <PIN_PB28__GPIO>,
> + <PIN_PB29__GPIO>;
> + bias-disable;
> + };
> +
> pinctrl_i2c0_default: i2c0_default {
> pinmux = <PIN_PD21__TWD0>,
> <PIN_PD22__TWCK0>;
> bias-disable;
> };
>
> + pinctrl_i2c0_gpio: i2c0_gpio {
> + pinmux = <PIN_PD21__GPIO>,
> + <PIN_PD22__GPIO>;
> + bias-disable;
> + };
> +
> pinctrl_i2c1_default: i2c1_default {
> pinmux = <PIN_PC6__TWD1>,
> <PIN_PC7__TWCK1>;
> bias-disable;
> };
>
> + pinctrl_i2c1_gpio: i2c1_gpio {
> + pinmux = <PIN_PC6__GPIO>,
> + <PIN_PC7__GPIO>;
> + bias-disable;
> + };
> +
> pinctrl_key_gpio_default: key_gpio_default {
> pinmux = <PIN_PA10__GPIO>;
> bias-pull-up;
> diff --git a/arch/arm/boot/dts/at91-sama5d2_xplained.dts b/arch/arm/boot/dts/at91-sama5d2_xplained.dts
> index 9d0a7fbea725..055ee53e4773 100644
> --- a/arch/arm/boot/dts/at91-sama5d2_xplained.dts
> +++ b/arch/arm/boot/dts/at91-sama5d2_xplained.dts
> @@ -129,8 +129,11 @@
>
> i2c0: i2c@...28000 {
> 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>;
> i2c-sda-hold-time-ns = <350>;
> status = "okay";
>
> @@ -331,8 +334,11 @@
> #address-cells = <1>;
> #size-cells = <0>;
> clocks = <&pmc PMC_TYPE_PERIPHERAL 23>;
> - pinctrl-names = "default";
> + pinctrl-names = "default", "gpio";
> pinctrl-0 = <&pinctrl_flx4_default>;
> + pinctrl-1 = <&pinctrl_flx4_gpio>;
> + sda-gpios = <&pioA PIN_PD12 GPIO_ACTIVE_HIGH>;
> + scl-gpios = <&pioA PIN_PD13 GPIO_ACTIVE_HIGH>;
> atmel,fifo-size = <16>;
> i2c-analog-filter;
> i2c-digital-filter;
> @@ -343,11 +349,14 @@
>
> i2c1: i2c@...28000 {
> dmas = <0>, <0>;
> - pinctrl-names = "default";
> + pinctrl-names = "default", "gpio";
> pinctrl-0 = <&pinctrl_i2c1_default>;
> i2c-analog-filter;
> i2c-digital-filter;
> i2c-digital-filter-width-ns = <35>;
> + pinctrl-1 = <&pinctrl_i2c1_gpio>;
> + sda-gpios = <&pioA PIN_PD4 GPIO_ACTIVE_HIGH>;
> + scl-gpios = <&pioA PIN_PD5 GPIO_ACTIVE_HIGH>;
> status = "okay";
>
> at24@54 {
> @@ -441,18 +450,36 @@
> bias-disable;
> };
>
> + pinctrl_flx4_gpio: flx4_gpio {
> + pinmux = <PIN_PD12__GPIO>,
> + <PIN_PD13__GPIO>;
> + bias-disable;
> + };
> +
> pinctrl_i2c0_default: i2c0_default {
> pinmux = <PIN_PD21__TWD0>,
> <PIN_PD22__TWCK0>;
> bias-disable;
> };
>
> + pinctrl_i2c0_gpio: i2c0_gpio {
> + pinmux = <PIN_PD21__GPIO>,
> + <PIN_PD22__GPIO>;
> + bias-disable;
> + };
> +
> pinctrl_i2c1_default: i2c1_default {
> pinmux = <PIN_PD4__TWD1>,
> <PIN_PD5__TWCK1>;
> bias-disable;
> };
>
> + pinctrl_i2c1_gpio: i2c1_gpio {
> + pinmux = <PIN_PD4__GPIO>,
> + <PIN_PD5__GPIO>;
> + bias-disable;
> + };
> +
> pinctrl_i2s0_default: i2s0_default {
> pinmux = <PIN_PC1__I2SC0_CK>,
> <PIN_PC2__I2SC0_MCK>,
> --
> 2.20.1
>
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