linux-kernel - [PATCH v10 1/3] dt-bindings: mmc: mtk-sd: extend interrupts and pinctrls properties

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Date:   Thu, 19 May 2022 19:13:21 +0800
From:   Axe Yang <axe.yang@...iatek.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Chaotian Jing <chaotian.jing@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Adrian Hunter <adrian.hunter@...el.com>
CC:     Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Satya Tangirala <satyat@...gle.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Axe Yang <axe.yang@...iatek.com>, Lucas Stach <dev@...xeye.de>,
        Eric Biggers <ebiggers@...gle.com>,
        Andrew Jeffery <andrew@...id.au>,
        Stephen Boyd <swboyd@...omium.org>,
        Kiwoong Kim <kwmad.kim@...sung.com>,
        Yue Hu <huyue2@...ong.com>, Tian Tao <tiantao6@...ilicon.com>,
        <angelogioacchino.delregno@...labora.com>,
        <linux-mmc@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: [PATCH v10 1/3] dt-bindings: mmc: mtk-sd: extend interrupts and pinctrls properties

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.

Signed-off-by: Axe Yang <axe.yang@...iatek.com>
---
 .../devicetree/bindings/mmc/mtk-sd.yaml       | 53 ++++++++++++++++++-
 1 file changed, 52 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
index 2a2e9fa8c188..b068ab67a054 100644
--- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
+++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
@@ -72,12 +72,26 @@ 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_irq
 
   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 and state_dat1 are
+      mandatory in this scenarios.
+    minItems: 2
     items:
       - const: default
       - const: state_uhs
+      - const: state_eint
 
   pinctrl-0:
     description:
@@ -89,6 +103,11 @@ 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.
@@ -208,4 +227,36 @@ examples:
         mediatek,hs400-cmd-resp-sel-rising;
     };
 
+    mmc2: mmc@...50000 {
+        compatible = "mediatek,mt8195-mmc";
+        reg = <0x11250000 0x1000>,
+              <0x11e60000 0x1000>;
+        clock-names = "source", "hclk", "source_cg";
+        clocks = <&topckgen CLK_TOP_MSDC30_2_SEL>,
+                 <&infracfg_ao CLK_INFRA_AO_MSDC2>,
+                 <&infracfg_ao CLK_INFRA_AO_MSDC30_2>;
+        interrupt-names = "msdc_irq", "sdio_wakeup_irq";
+        interrupts = <&gic GIC_SPI 136 IRQ_TYPE_LEVEL_HIGH 0>,
+                     <&pio 172 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>;
+        assigned-clocks = <&topckgen CLK_TOP_MSDC30_2_SEL>;
+        assigned-clock-parents = <&topckgen CLK_TOP_MSDCPLL_D2>;
+        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 = <&sdio_fixed_1v8>;
+        mmc-pwrseq = <&wifi_pwrseq>;
+    };
+
 ...
-- 
2.25.1