[PATCH v14 1/3] dt-bindings: mmc: mtk-sd: extend interrupts and pinctrls properties

Axe Yang
2022-07-26T06:29:26Z

Extend interrupts and pinctrls for SDIO wakeup interrupt feature.
This feature allow SDIO devices alarm asynchronous interrupt to host
even when host stop providing clock to SDIO card. An extra wakeup
interrupt and pinctrl states for SDIO DAT1 pin state switching are
required in this scenario.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Axe Yang <axe.yang@mediatek.com>
---
.../devicetree/bindings/mmc/mtk-sd.yaml | 50 ++++++++++++++++++-
1 file changed, 49 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
index be366cefffc2..083d1ec2f661 100644
--- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
+++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
@@ -70,12 +70,27 @@ properties:
- const: ahb_cg

interrupts:
- maxItems: 1
+ description:
+ Should at least contain MSDC GIC interrupt. To support SDIO in-band wakeup, an extended
+ interrupt is required and be configured as wakeup source irq.
+ minItems: 1
+ maxItems: 2
+
+ interrupt-names:
+ items:
+ - const: msdc
+ - const: sdio_wakeup

pinctrl-names:
+ description:
+ Should at least contain default and state_uhs. To support SDIO in-band wakeup, dat1 pin
+ will be switched between GPIO mode and SDIO DAT1 mode, state_eint is mandatory in this
+ scenario.
+ minItems: 2
items:
- const: default
- const: state_uhs
+ - const: state_eint

pinctrl-0:
description:
@@ -87,6 +102,11 @@ properties:
should contain uhs mode pin ctrl.
maxItems: 1

+ pinctrl-2:
+ description:
+ should switch dat1 pin to GPIO mode.
+ maxItems: 1
+
assigned-clocks:
description:
PLL of the source clock.
@@ -206,4 +226,32 @@ examples:
mediatek,hs400-cmd-resp-sel-rising;
};

+ mmc3: mmc@11260000 {
+ compatible = "mediatek,mt8173-mmc";
+ reg = <0x11260000 0x1000>;
+ clock-names = "source", "hclk";
+ clocks = <&pericfg CLK_PERI_MSDC30_3>,
+ <&topckgen CLK_TOP_MSDC50_2_H_SEL>;
+ interrupt-names = "msdc", "sdio_wakeup";
+ interrupts-extended = <&gic GIC_SPI 74 IRQ_TYPE_LEVEL_LOW 0>,
+ <&pio 23 IRQ_TYPE_LEVEL_LOW>;
+ pinctrl-names = "default", "state_uhs", "state_eint";
+ pinctrl-0 = <&mmc2_pins_default>;
+ pinctrl-1 = <&mmc2_pins_uhs>;
+ pinctrl-2 = <&mmc2_pins_eint>;
+ bus-width = <4>;
+ max-frequency = <200000000>;
+ cap-sd-highspeed;
+ sd-uhs-sdr104;
+ keep-power-in-suspend;
+ wakeup-source;
+ cap-sdio-irq;
+ no-mmc;
+ no-sd;
+ non-removable;
+ vmmc-supply = <&sdio_fixed_3v3>;
+ vqmmc-supply = <&mt6397_vgp3_reg>;
+ mmc-pwrseq = <&wifi_pwrseq>;
+ };
+
...
--
2.25.1