linux-kernel - [PATCH v4 0/3] Add SD/MMC support for Renesas RZ/V2H(P) SoC

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Message-Id: <20240626132341.342963-1-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Wed, 26 Jun 2024 14:23:38 +0100
From: Prabhakar <prabhakar.csengg@...il.com>
To: Ulf Hansson <ulf.hansson@...aro.org>,
	Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Magnus Damm <magnus.damm@...il.com>,
	linux-mmc@...r.kernel.org
Cc: devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	Prabhakar <prabhakar.csengg@...il.com>,
	Biju Das <biju.das.jz@...renesas.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH v4 0/3] Add SD/MMC support for Renesas RZ/V2H(P) SoC

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Hi All,

This patch series aims to add SD/MMC support for Renesas RZ/V2H(P) SoC.

Below is the sample usage of using internal regulator:

SoC DTSI node:
sdhi1: mmc@...10000 {
        compatible = "renesas,sdhi-r9a09g057";
        reg = <0x0 0x15c10000 0 0x10000>;
        interrupts = <GIC_SPI 737 IRQ_TYPE_LEVEL_HIGH>,
                        <GIC_SPI 738 IRQ_TYPE_LEVEL_HIGH>;
        clocks = <&cpg CPG_MOD 167>,
                        <&cpg CPG_MOD 169>,
                        <&cpg CPG_MOD 168>,
                        <&cpg CPG_MOD 170>;
        clock-names = "core", "clkh", "cd", "aclk";
        resets = <&cpg 168>;
        power-domains = <&cpg>;
        status = "disabled";

        vqmmc_sdhi1: vqmmc-regulator {
                regulator-compatible = "vqmmc-r9a09g057-regulator";
                regulator-name = "sdhi1-vqmmc-regulator";
                regulator-min-microvolt = <1800000>;
                regulator-max-microvolt = <3300000>;
                status = "disabled";
        };
};

* Example of SDHI1 while using internal regulator:
** Board DTS:
&sdhi1 {
        pinctrl-0 = <&sdhi1_pins>;
        pinctrl-1 = <&sdhi1_pins>;
        pinctrl-names = "default", "state_uhs";
        vmmc-supply = <&reg_3p3v>;
        vqmmc-supply = <&vqmmc_sdhi1>;
        bus-width = <4>;
        sd-uhs-sdr50;
        sd-uhs-sdr104;
        status = "okay";
};

&vqmmc_sdhi1 {
	status = "okay";
};


* Example of SDHI1 while using GPIO regulator while internal regulator is present:
** Board DTS:
vccq_sdhi1: regulator-vccq-sdhi1 {
        compatible = "regulator-gpio";
        regulator-name = "SDHI1 VccQ";
        regulator-min-microvolt = <1800000>;
        regulator-max-microvolt = <3300000>;
        gpios = <&pinctrl RZG2L_GPIO(10, 2) GPIO_ACTIVE_HIGH>;
        gpios-states = <0>;
        states = <3300000 0>, <1800000 1>;
};

&sdhi1 {
        pinctrl-0 = <&sdhi1_pins>;
        pinctrl-1 = <&sdhi1_pins>;
        pinctrl-names = "default", "state_uhs";
        vmmc-supply = <&reg_3p3v>;
        vqmmc-supply = <&vccq_sdhi1>;
        bus-width = <4>;
        sd-uhs-sdr50;
        sd-uhs-sdr104;
        status = "okay";
};

v3->V4
- Dropped 'renesas,sdhi-use-internal-regulator' property
- Defined vqmmc-regulator in top level
- For special handling of internal regulator now using of_device_is_available()
- Fixed comments from Claudiu
- Rebased patch on top of https://patchwork.kernel.org/project/linux-renesas-soc/patch/20240626085015.32171-2-wsa+renesas@sang-engineering.com/

v2->v3
- Renamed vqmmc-r9a09g057-regulator object to vqmmc-regulator
- Added regulator-compatible property for vqmmc-regulator
- Added 'renesas,sdhi-use-internal-regulator' DT property
- Included RB tags for patch 2/3
- Moved regulator info to renesas_sdhi_of_data instead of quirks
- Added support to configure the init state of regulator
- Added function pointers to configure regulator
- Added REGULATOR_CHANGE_VOLTAGE mask

v1->v2
- Dropped regulator core API changes
- Updated DT binding
- Now controlling PWEN bit via regultor api

v1: https://patchwork.kernel.org/project/linux-renesas-soc/cover/20240605074936.578687-1-prabhakar.mahadev-lad.rj@bp.renesas.com/

Cheers,
Prabhakar

Lad Prabhakar (3):
  dt-bindings: mmc: renesas,sdhi: Document RZ/V2H(P) support
  mmc: tmio: Use MMC core APIs to control the vqmmc regulator
  mmc: renesas_sdhi: Add support for RZ/V2H(P) SoC

 .../devicetree/bindings/mmc/renesas,sdhi.yaml |  26 +++-
 drivers/mmc/host/renesas_sdhi.h               |  13 ++
 drivers/mmc/host/renesas_sdhi_core.c          |  98 ++++++++++++
 drivers/mmc/host/renesas_sdhi_internal_dmac.c | 147 ++++++++++++++++++
 drivers/mmc/host/tmio_mmc.h                   |   5 +
 drivers/mmc/host/tmio_mmc_core.c              |   7 +-
 6 files changed, 291 insertions(+), 5 deletions(-)

-- 
2.34.1