linux-kernel - [PATCH v5 3/3] mmc: renesas_sdhi: Add RZ/V2H(P) compatible string

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Message-Id: <20240724182119.652080-4-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Wed, 24 Jul 2024 19:21:19 +0100
From: Prabhakar <prabhakar.csengg@...il.com>
To: Geert Uytterhoeven <geert+renesas@...der.be>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Magnus Damm <magnus.damm@...il.com>
Cc: linux-mmc@...r.kernel.org,
	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 v5 3/3] mmc: renesas_sdhi: Add RZ/V2H(P) compatible string

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

The SD/MMC block on the RZ/V2H(P) ("R9A09G057") SoC is similar to that
of the R-Car Gen3, but it has some differences:
- HS400 is not supported.
- It has additional SD_STATUS register to control voltage,
  power enable and reset.
- It supports fixed address mode.

To accommodate these differences, a SoC-specific 'renesas,sdhi-r9a09g057'
compatible string is added.

Note for RZ/V2H(P), we are using the `of_rzg2l_compatible` OF data as it
already handles no HS400 and fixed address mode support. Since the SDxIOVS
and SDxPWEN pins can always be used as GPIO pins on the RZ/V2H(P) SoC, no
driver changes are done to control the SD_STATUS register.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
v4->v5
- Dropped handling of regulator

v3->v4
- Dropped using 'renesas,sdhi-use-internal-regulator' property
- Now using of_device_is_available() to check if regulator is available and enabled
- Dropped extra spaces during operations 
- Included tested by tag 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
- 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
- Now controlling PWEN bit get/set_voltage
---
 drivers/mmc/host/renesas_sdhi_internal_dmac.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
index 422fa63a2e99..6b858393f19f 100644
--- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
@@ -284,6 +284,7 @@ static const struct of_device_id renesas_sdhi_internal_dmac_of_match[] = {
 	{ .compatible = "renesas,sdhi-r8a77990", .data = &of_r8a77990_compatible, },
 	{ .compatible = "renesas,sdhi-r8a77995", .data = &of_rcar_gen3_nohs400_compatible, },
 	{ .compatible = "renesas,sdhi-r9a09g011", .data = &of_rzg2l_compatible, },
+	{ .compatible = "renesas,sdhi-r9a09g057", .data = &of_rzg2l_compatible, },
 	{ .compatible = "renesas,rzg2l-sdhi", .data = &of_rzg2l_compatible, },
 	{ .compatible = "renesas,rcar-gen3-sdhi", .data = &of_rcar_gen3_compatible, },
 	{ .compatible = "renesas,rcar-gen4-sdhi", .data = &of_rcar_gen3_compatible, },
-- 
2.34.1