| Message ID | 1482495889-6201-3-git-send-email-m.szyprowski@samsung.com |
|---|---|
| State | New |
| Headers | show |
Hi, 2016-12-23 21:24 GMT+09:00 Marek Szyprowski <m.szyprowski@samsung.com>: > Add a special "sleep" state for Exynos I2S module. This state will be used > to let I2S driver to notify pin controller that it is ready for turning > power off, so the pin controller can also change its runtime state to > suspended and in the result let power domain to turn off. > > Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> > --- > arch/arm/boot/dts/exynos5420-pinctrl.dtsi | 11 +++++++++++ > arch/arm/boot/dts/exynos5420.dtsi | 3 ++- > 2 files changed, 13 insertions(+), 1 deletion(-) > > diff --git a/arch/arm/boot/dts/exynos5420-pinctrl.dtsi b/arch/arm/boot/dts/exynos5420-pinctrl.dtsi > index 3924b4fafe72..52983b6a6859 100644 > --- a/arch/arm/boot/dts/exynos5420-pinctrl.dtsi > +++ b/arch/arm/boot/dts/exynos5420-pinctrl.dtsi > @@ -720,4 +720,15 @@ > samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>; > samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>; > }; > + > + i2s0_bus_slp: i2s0-bus-slp { > + samsung,pins = "gpz-0", "gpz-1", "gpz-2", "gpz-3", > + "gpz-4", "gpz-5", "gpz-6"; > + samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>; > + samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>; > + samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>; > + samsung,pin-con-pdn = <EXYNOS_PIN_PDN_INPUT>; > + samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>; Is it really okay to make all the pins inputs without any pull? Wouldn't this cause them to float until the controller is disabled or this is basically an atomic operation? > + samsung,off-state; Is this property documented in the binding description? > + }; > }; > diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi > index 832cb56c514e..0a7ecdd4c5de 100644 > --- a/arch/arm/boot/dts/exynos5420.dtsi > +++ b/arch/arm/boot/dts/exynos5420.dtsi > @@ -444,8 +444,9 @@ > clock-output-names = "i2s_cdclk0"; > #sound-dai-cells = <1>; > samsung,idma-addr = <0x03000000>; > - pinctrl-names = "default"; > + pinctrl-names = "default", "sleep"; Is this state documented in the binding description? Best regards, Tomasz -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/arm/boot/dts/exynos5420-pinctrl.dtsi b/arch/arm/boot/dts/exynos5420-pinctrl.dtsi index 3924b4fafe72..52983b6a6859 100644 --- a/arch/arm/boot/dts/exynos5420-pinctrl.dtsi +++ b/arch/arm/boot/dts/exynos5420-pinctrl.dtsi @@ -720,4 +720,15 @@ samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>; samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>; }; + + i2s0_bus_slp: i2s0-bus-slp { + samsung,pins = "gpz-0", "gpz-1", "gpz-2", "gpz-3", + "gpz-4", "gpz-5", "gpz-6"; + samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>; + samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>; + samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>; + samsung,pin-con-pdn = <EXYNOS_PIN_PDN_INPUT>; + samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>; + samsung,off-state; + }; }; diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi index 832cb56c514e..0a7ecdd4c5de 100644 --- a/arch/arm/boot/dts/exynos5420.dtsi +++ b/arch/arm/boot/dts/exynos5420.dtsi @@ -444,8 +444,9 @@ clock-output-names = "i2s_cdclk0"; #sound-dai-cells = <1>; samsung,idma-addr = <0x03000000>; - pinctrl-names = "default"; + pinctrl-names = "default", "sleep"; pinctrl-0 = <&i2s0_bus>; + pinctrl-1 = <&i2s0_bus_slp>; status = "disabled"; };
Add a special "sleep" state for Exynos I2S module. This state will be used to let I2S driver to notify pin controller that it is ready for turning power off, so the pin controller can also change its runtime state to suspended and in the result let power domain to turn off. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> --- arch/arm/boot/dts/exynos5420-pinctrl.dtsi | 11 +++++++++++ arch/arm/boot/dts/exynos5420.dtsi | 3 ++- 2 files changed, 13 insertions(+), 1 deletion(-)