linux-kernel - [PATCH 3/3] mmc: mtk-sd: add support for MT8189 SoC

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Message-Id: <20251203-mt8189-add-mmc-support-v1-3-f5ce43212fe9@collabora.com>
Date: Wed, 03 Dec 2025 12:45:36 +0100
From: Louis-Alexis Eyraud <louisalexis.eyraud@...labora.com>
To: Chaotian Jing <chaotian.jing@...iatek.com>, 
 Ulf Hansson <ulf.hansson@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Wenbin Mei <wenbin.mei@...iatek.com>
Cc: kernel@...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, 
 Louis-Alexis Eyraud <louisalexis.eyraud@...labora.com>
Subject: [PATCH 3/3] mmc: mtk-sd: add support for MT8189 SoC

Even though MMC IP in MT8189 SoC is partially compatible with the one
found in MT8196 SoC, its register layout has some slight differences
and additional features such as the system power management release
resource control support.
Thus, add new compatible and platform data to support this SoC.

Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud@...labora.com>
---
 drivers/mmc/host/mtk-sd.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 4ce596d616409646613748086476c58d8b7b8de9..302ac8529c4f093a541db2d37dcc8709c3775557 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -675,6 +675,25 @@ static const struct mtk_mmc_compatible mt8516_compat = {
 	.stop_dly_sel = 3,
 };
 
+static const struct mtk_mmc_compatible mt8189_compat = {
+	.clk_div_bits = 12,
+	.recheck_sdio_irq = false,
+	.hs400_tune = false,
+	.needs_top_base = true,
+	.pad_tune_reg = MSDC_PAD_TUNE0,
+	.async_fifo = true,
+	.data_tune = true,
+	.busy_check = true,
+	.stop_clk_fix = true,
+	.stop_dly_sel = 1,
+	.pop_en_cnt = 2,
+	.enhance_rx = true,
+	.support_64g = true,
+	.support_new_tx = true,
+	.support_new_rx = true,
+	.support_spm_res_release = true,
+};
+
 static const struct mtk_mmc_compatible mt8196_compat = {
 	.clk_div_bits = 12,
 	.recheck_sdio_irq = false,
@@ -705,6 +724,7 @@ static const struct of_device_id msdc_of_ids[] = {
 	{ .compatible = "mediatek,mt8135-mmc", .data = &mt8135_compat},
 	{ .compatible = "mediatek,mt8173-mmc", .data = &mt8173_compat},
 	{ .compatible = "mediatek,mt8183-mmc", .data = &mt8183_compat},
+	{ .compatible = "mediatek,mt8189-mmc", .data = &mt8189_compat},
 	{ .compatible = "mediatek,mt8196-mmc", .data = &mt8196_compat},
 	{ .compatible = "mediatek,mt8516-mmc", .data = &mt8516_compat},
 

-- 
2.52.0