From: Charan Pedumuru <charan.pedumuru@gmail.com>
To: Ulf Hansson <ulf.hansson@linaro.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Peter Griffin <peter.griffin@linaro.org>
Cc: linux-mmc@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
Charan Pedumuru <charan.pedumuru@gmail.com>
Subject: [PATCH] dt-bindings: mmc: st,sdhci: convert to DT schema
Date: Thu, 09 Apr 2026 07:43:16 +0000 [thread overview]
Message-ID: <20260409-st-mmc-v1-1-4c54321c3535@gmail.com> (raw)
Convert STMicroelectronics sdhci-st MMC/SD controller binding to DT schema.
Signed-off-by: Charan Pedumuru <charan.pedumuru@gmail.com>
---
Documentation/devicetree/bindings/mmc/sdhci-st.txt | 110 -------------------
.../devicetree/bindings/mmc/st,sdhci.yaml | 122 +++++++++++++++++++++
2 files changed, 122 insertions(+), 110 deletions(-)
diff --git a/Documentation/devicetree/bindings/mmc/sdhci-st.txt b/Documentation/devicetree/bindings/mmc/sdhci-st.txt
deleted file mode 100644
index ccf82b4ee838..000000000000
--- a/Documentation/devicetree/bindings/mmc/sdhci-st.txt
+++ /dev/null
@@ -1,110 +0,0 @@
-* STMicroelectronics sdhci-st MMC/SD controller
-
-This file documents the differences between the core properties in
-Documentation/devicetree/bindings/mmc/mmc.txt and the properties
-used by the sdhci-st driver.
-
-Required properties:
-- compatible: Must be "st,sdhci" and it can be compatible to "st,sdhci-stih407"
- to set the internal glue logic used for configuring the MMC
- subsystem (mmcss) inside the FlashSS (available in STiH407 SoC
- family).
-
-- clock-names: Should be "mmc" and "icn". (NB: The latter is not compulsory)
- See: Documentation/devicetree/bindings/resource-names.txt
-- clocks: Phandle to the clock.
- See: Documentation/devicetree/bindings/clock/clock-bindings.txt
-
-- interrupts: One mmc interrupt should be described here.
-- interrupt-names: Should be "mmcirq".
-
-- pinctrl-names: A pinctrl state names "default" must be defined.
-- pinctrl-0: Phandle referencing pin configuration of the sd/emmc controller.
- See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
-
-- reg: This must provide the host controller base address and it can also
- contain the FlashSS Top register for TX/RX delay used by the driver
- to configure DLL inside the flashSS, if so reg-names must also be
- specified.
-
-Optional properties:
-- reg-names: Should be "mmc" and "top-mmc-delay". "top-mmc-delay" is optional
- for eMMC on stih407 family silicon to configure DLL inside FlashSS.
-
-- non-removable: Non-removable slot. Also used for configuring mmcss in STiH407 SoC
- family.
- See: Documentation/devicetree/bindings/mmc/mmc.txt.
-
-- bus-width: Number of data lines.
- See: Documentation/devicetree/bindings/mmc/mmc.txt.
-
-- max-frequency: Can be 200MHz, 100MHz or 50MHz (default) and used for
- configuring the CCONFIG3 in the mmcss.
- See: Documentation/devicetree/bindings/mmc/mmc.txt.
-
-- resets: Phandle and reset specifier pair to softreset line of HC IP.
- See: Documentation/devicetree/bindings/reset/reset.txt
-
-- vqmmc-supply: Phandle to the regulator dt node, mentioned as the vcc/vdd
- supply in eMMC/SD specs.
-
-- sd-uhs-sdr50: To enable the SDR50 in the mmcss.
- See: Documentation/devicetree/bindings/mmc/mmc.txt.
-
-- sd-uhs-sdr104: To enable the SDR104 in the mmcss.
- See: Documentation/devicetree/bindings/mmc/mmc.txt.
-
-- sd-uhs-ddr50: To enable the DDR50 in the mmcss.
- See: Documentation/devicetree/bindings/mmc/mmc.txt.
-
-Example:
-
-/* Example stih416e eMMC configuration */
-
-mmc0: sdhci@fe81e000 {
- compatible = "st,sdhci";
- reg = <0xfe81e000 0x1000>;
- interrupts = <GIC_SPI 127 IRQ_TYPE_NONE>;
- interrupt-names = "mmcirq";
- pinctrl-names = "default";
- pinctrl-0 = <&pinctrl_mmc0>;
- clock-names = "mmc";
- clocks = <&clk_s_a1_ls 1>;
- bus-width = <8>
-
-/* Example SD stih407 family configuration */
-
-mmc1: sdhci@9080000 {
- compatible = "st,sdhci-stih407", "st,sdhci";
- reg = <0x09080000 0x7ff>;
- reg-names = "mmc";
- interrupts = <GIC_SPI 90 IRQ_TYPE_NONE>;
- interrupt-names = "mmcirq";
- pinctrl-names = "default";
- pinctrl-0 = <&pinctrl_sd1>;
- clock-names = "mmc";
- clocks = <&clk_s_c0_flexgen CLK_MMC_1>;
- resets = <&softreset STIH407_MMC1_SOFTRESET>;
- bus-width = <4>;
-};
-
-/* Example eMMC stih407 family configuration */
-
-mmc0: sdhci@9060000 {
- compatible = "st,sdhci-stih407", "st,sdhci";
- reg = <0x09060000 0x7ff>, <0x9061008 0x20>;
- reg-names = "mmc", "top-mmc-delay";
- interrupts = <GIC_SPI 92 IRQ_TYPE_NONE>;
- interrupt-names = "mmcirq";
- pinctrl-names = "default";
- pinctrl-0 = <&pinctrl_mmc0>;
- clock-names = "mmc";
- clocks = <&clk_s_c0_flexgen CLK_MMC_0>;
- vqmmc-supply = <&vmmc_reg>;
- max-frequency = <200000000>;
- bus-width = <8>;
- non-removable;
- sd-uhs-sdr50;
- sd-uhs-sdr104;
- sd-uhs-ddr50;
-};
diff --git a/Documentation/devicetree/bindings/mmc/st,sdhci.yaml b/Documentation/devicetree/bindings/mmc/st,sdhci.yaml
new file mode 100644
index 000000000000..22060fe6e364
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/st,sdhci.yaml
@@ -0,0 +1,122 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mmc/st,sdhci.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STMicroelectronics SDHCI-ST MMC/SD Controller
+
+description:
+ The STMicroelectronics SDHCI-ST MMC/SD host controller, which is
+ compliant with the SD Host Controller Interface (SDHCI) specification and
+ is used to interface with MMC, SD and SDIO cards. The ST SDHCI controller
+ extends the standard SDHCI capabilities with platform-specific
+ configurations such as additional register regions,clock inputs, and delay
+ control mechanisms required for signal timing adjustments which are
+ necessary to support high-speed modes and ensure reliable data transfer
+ across different ST SoCs.
+
+maintainers:
+ - Peter Griffin <peter.griffin@linaro.org>
+
+properties:
+ compatible:
+ oneOf:
+ - const: st,sdhci
+ - items:
+ - const: st,sdhci-stih407
+ - const: st,sdhci
+
+ reg:
+ minItems: 1
+ maxItems: 2
+
+ reg-names:
+ minItems: 1
+ maxItems: 2
+ items:
+ enum:
+ - mmc
+ - top-mmc-delay
+
+ clocks:
+ minItems: 1
+ maxItems: 2
+
+ clock-names:
+ minItems: 1
+ maxItems: 2
+ items:
+ enum:
+ - mmc
+ - icn
+
+ interrupts:
+ maxItems: 1
+
+ interrupt-names:
+ const: mmcirq
+
+ pinctrl-names:
+ const: default
+
+ resets:
+ maxItems: 1
+ description: Phandle to reset line of host controller.
+
+ vqmmc-supply:
+ description: Regulator supplying I/O voltage (Vcc/Vdd for SD/eMMC).
+
+ non-removable:
+ type: boolean
+ description:
+ Indicates a non-removable device (e.g., eMMC). Also used for mmcss config.
+
+ bus-width:
+ description: Number of data lines.
+ enum: [1, 4, 8]
+
+ max-frequency:
+ enum: [50000000, 100000000, 200000000]
+ default: 50000000
+ description:
+ Maximum bus frequency. Used to configure CCONFIG3 in mmcss.
+
+ sd-uhs-sdr50:
+ type: boolean
+
+ sd-uhs-sdr104:
+ type: boolean
+
+ sd-uhs-ddr50:
+ type: boolean
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - clock-names
+ - interrupts
+ - interrupt-names
+ - pinctrl-names
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/clock/stih407-clks.h>
+ sdhci@9060000 {
+ compatible = "st,sdhci-stih407", "st,sdhci";
+ reg = <0x09060000 0x7ff>, <0x9061008 0x20>;
+ reg-names = "mmc", "top-mmc-delay";
+ interrupts = <GIC_SPI 92 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "mmcirq";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_mmc0>;
+ clock-names = "mmc", "icn";
+ clocks = <&clk_s_c0_flexgen CLK_MMC_0>,
+ <&clk_s_c0_flexgen CLK_RX_ICN_HVA>;
+ bus-width = <8>;
+ };
+...
---
base-commit: e77a5a5cfe43b4c25bd44a3818e487033287517f
change-id: 20260327-st-mmc-c906ad95ff83
Best regards,
--
Charan Pedumuru <charan.pedumuru@gmail.com>
reply other threads:[~2026-04-09 7:44 UTC|newest]
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