Re: [PATCH 2/2] Arm: dts: aspeed-g6: Add sgpio node and pinctrl setting

From: Joel Stanley
Date: Wed Oct 07 2020 - 23:49:12 EST

On Thu, 8 Oct 2020 at 01:51, Billy Tsai <billy_tsai@xxxxxxxxxxxxxx> wrote:
>
> This patch is used to add sgpiom and sgpios nodes and add pinctrl setting
> for sgpiom1

The code looks good Billy.

Please split the change in two: device tree changes (arch/arm/dts) in
one, and pinctrl in the second, as they go through different
maintainers.

You also need to update the device tree bindings in Documentation with
the new compatible strings:

Documentation/devicetree/bindings/gpio/sgpio-aspeed.txt

That should go in it's own patch too.

> --- a/arch/arm/boot/dts/aspeed-g6.dtsi
> +++ b/arch/arm/boot/dts/aspeed-g6.dtsi
> @@ -366,6 +366,58 @@
> #interrupt-cells = <2>;
> };
>
> + sgpiom0: sgpiom@1e780500 {
> + #gpio-cells = <2>;
> + gpio-controller;
> + compatible = "aspeed,ast2600-sgpiom";

This is interesting. I didn't realise the sgpio driver we have in the
mainline kernel tree (drivers/gpio/gpio-aspeed-sgpio.c) is for the
sgpio master device. It might be best to update the naming of the
ast2400/ast2500 compatible in the future.

> + reg = <0x1e780500 0x100>;
> + interrupts = <GIC_SPI 51 IRQ_TYPE_LEVEL_HIGH>;
> + ngpios = <128>;
> + clocks = <&syscon ASPEED_CLK_APB2>;
> + interrupt-controller;
> + bus-frequency = <12000000>;
> +
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_sgpm1_default>;
> + status = "disabled";
> + };

> gpio1: gpio@1e780800 {
> #gpio-cells = <2>;
> gpio-controller;
> @@ -377,6 +429,7 @@
> clocks = <&syscon ASPEED_CLK_APB1>;
> interrupt-controller;
> #interrupt-cells = <2>;
> + status = "disabled";

This should be in a different patch set, as it will break all of the
systems that expect GPIO to be enabled (which is all of them).

Considering all of them expect this gpio bank to be enabled, should we
leave it enabled here?


> };
>
> rtc: rtc@1e781000 {
> diff --git a/drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c b/drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c
> index 34803a6c7664..b673a44ffa3b 100644
> --- a/drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c
> +++ b/drivers/pinctrl/aspeed/pinctrl-aspeed-g6.c
> @@ -46,8 +46,10 @@
> #define SCU620 0x620 /* Disable GPIO Internal Pull-Down #4 */
> #define SCU634 0x634 /* Disable GPIO Internal Pull-Down #5 */
> #define SCU638 0x638 /* Disable GPIO Internal Pull-Down #6 */
> +#define SCU690 0x690 /* Multi-function Pin Control #24 */
> #define SCU694 0x694 /* Multi-function Pin Control #25 */
> #define SCU69C 0x69C /* Multi-function Pin Control #27 */
> +#define SCU6D0 0x6D0 /* Multi-function Pin Control #28 */
> #define SCUC20 0xC20 /* PCIE configuration Setting Control */
>
> #define ASPEED_G6_NR_PINS 256
> @@ -81,13 +83,21 @@ FUNC_GROUP_DECL(I2C12, L26, K24);
> #define K26 4
> SIG_EXPR_LIST_DECL_SESG(K26, MACLINK1, MACLINK1, SIG_DESC_SET(SCU410, 4));
> SIG_EXPR_LIST_DECL_SESG(K26, SCL13, I2C13, SIG_DESC_SET(SCU4B0, 4));
> -PIN_DECL_2(K26, GPIOA4, MACLINK1, SCL13);
> +/*SGPM2 is A1 Only */
> +SIG_EXPR_LIST_DECL_SESG(K26, SGPM2CLK, SGPM2, SIG_DESC_SET(SCU6D0, 4),
> + SIG_DESC_CLEAR(SCU410, 4), SIG_DESC_CLEAR(SCU4B0, 4),
> + SIG_DESC_CLEAR(SCU690, 4));
> +PIN_DECL_3(K26, GPIOA4, SGPM2CLK, MACLINK1, SCL13);
> FUNC_GROUP_DECL(MACLINK1, K26);
>
> #define L24 5
> SIG_EXPR_LIST_DECL_SESG(L24, MACLINK2, MACLINK2, SIG_DESC_SET(SCU410, 5));
> SIG_EXPR_LIST_DECL_SESG(L24, SDA13, I2C13, SIG_DESC_SET(SCU4B0, 5));
> -PIN_DECL_2(L24, GPIOA5, MACLINK2, SDA13);
> +/*SGPM2 is A1 Only */
> +SIG_EXPR_LIST_DECL_SESG(L24, SGPM2LD, SGPM2, SIG_DESC_SET(SCU6D0, 5),
> + SIG_DESC_CLEAR(SCU410, 5), SIG_DESC_CLEAR(SCU4B0, 5),
> + SIG_DESC_CLEAR(SCU690, 5));
> +PIN_DECL_3(L24, GPIOA5, SGPM2LD, MACLINK2, SDA13);
> FUNC_GROUP_DECL(MACLINK2, L24);
>
> FUNC_GROUP_DECL(I2C13, K26, L24);
> @@ -95,16 +105,26 @@ FUNC_GROUP_DECL(I2C13, K26, L24);
> #define L23 6
> SIG_EXPR_LIST_DECL_SESG(L23, MACLINK3, MACLINK3, SIG_DESC_SET(SCU410, 6));
> SIG_EXPR_LIST_DECL_SESG(L23, SCL14, I2C14, SIG_DESC_SET(SCU4B0, 6));
> -PIN_DECL_2(L23, GPIOA6, MACLINK3, SCL14);
> +/*SGPM2 is A1 Only */
> +SIG_EXPR_LIST_DECL_SESG(L23, SGPM2O, SGPM2, SIG_DESC_SET(SCU6D0, 6),
> + SIG_DESC_CLEAR(SCU410, 6), SIG_DESC_CLEAR(SCU4B0, 6),
> + SIG_DESC_CLEAR(SCU690, 6));
> +PIN_DECL_3(L23, GPIOA6, SGPM2O, MACLINK3, SCL14);
> FUNC_GROUP_DECL(MACLINK3, L23);
>
> #define K25 7
> SIG_EXPR_LIST_DECL_SESG(K25, MACLINK4, MACLINK4, SIG_DESC_SET(SCU410, 7));
> SIG_EXPR_LIST_DECL_SESG(K25, SDA14, I2C14, SIG_DESC_SET(SCU4B0, 7));
> -PIN_DECL_2(K25, GPIOA7, MACLINK4, SDA14);
> +/*SGPM2 is A1 Only */
> +SIG_EXPR_LIST_DECL_SESG(K25, SGPM2I, SGPM2, SIG_DESC_SET(SCU6D0, 7),
> + SIG_DESC_CLEAR(SCU410, 7), SIG_DESC_CLEAR(SCU4B0, 7),
> + SIG_DESC_CLEAR(SCU690, 7));
> +PIN_DECL_3(K25, GPIOA7, SGPM2I, MACLINK4, SDA14);
> FUNC_GROUP_DECL(MACLINK4, K25);
>
> FUNC_GROUP_DECL(I2C14, L23, K25);
> +/*SGPM2 is A1 Only */
> +FUNC_GROUP_DECL(SGPM2, K26, L24, L23, K25);
>
> #define J26 8
> SIG_EXPR_LIST_DECL_SESG(J26, SALT1, SALT1, SIG_DESC_SET(SCU410, 8));
> @@ -2060,6 +2080,7 @@ static const struct aspeed_pin_group aspeed_g6_groups[] = {
> ASPEED_PINCTRL_GROUP(EMMCG4),
> ASPEED_PINCTRL_GROUP(EMMCG8),
> ASPEED_PINCTRL_GROUP(SGPM1),
> + ASPEED_PINCTRL_GROUP(SGPM2),
> ASPEED_PINCTRL_GROUP(SGPS1),
> ASPEED_PINCTRL_GROUP(SIOONCTRL),
> ASPEED_PINCTRL_GROUP(SIOPBI),
> @@ -2276,6 +2297,7 @@ static const struct aspeed_pin_function aspeed_g6_functions[] = {
> ASPEED_PINCTRL_FUNC(SD1),
> ASPEED_PINCTRL_FUNC(SD2),
> ASPEED_PINCTRL_FUNC(SGPM1),
> + ASPEED_PINCTRL_FUNC(SGPM2),
> ASPEED_PINCTRL_FUNC(SGPS1),
> ASPEED_PINCTRL_FUNC(SIOONCTRL),
> ASPEED_PINCTRL_FUNC(SIOPBI),
> --
> 2.17.1
>