linux-kernel - [PATCH 6/8] mmc: host: axiado: add AX3000 eMMC PHY support to sdhci-of-arasan

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Message-Id: <20251222-axiado-ax3000-add-emmc-host-driver-support-v1-6-5457d0ebcdb4@axiado.com>
Date: Mon, 22 Dec 2025 16:45:05 +0800
From: Tzu-Hao Wei <twei@...ado.com>
To: SriNavmani A <srinavmani@...ado.com>, 
 Prasad Bolisetty <pbolisetty@...ado.com>, Vinod Koul <vkoul@...nel.org>, 
 Neil Armstrong <neil.armstrong@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Harshit Shah <hshah@...ado.com>, 
 Ulf Hansson <ulf.hansson@...aro.org>, 
 Adrian Hunter <adrian.hunter@...el.com>, 
 Michal Simek <michal.simek@....com>
Cc: linux-phy@...ts.infradead.org, devicetree@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 linux-mmc@...r.kernel.org, Tzu-Hao Wei <twei@...ado.com>
Subject: [PATCH 6/8] mmc: host: axiado: add AX3000 eMMC PHY support to
 sdhci-of-arasan

From: SriNavmani A <srinavmani@...ado.com>

Add support for the external eMMC PHY used on the AX3000 SoC in the
sdhci-of-arasan driver. The default Arasan host driver operates at
25 MHz, but with the external PHY support, the controller can achieve
HS200 mode operation at 200 MHz.

This change integrates the AX3000 eMMC PHY driver with the existing
sdhci-of-arasan host controller driver to enable high-speed eMMC
operations.

Signed-off-by: Tzu-Hao Wei <twei@...ado.com>
---
 drivers/mmc/host/sdhci-of-arasan.c | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
index ab7f0ffe7b4f007a58eb0a26868b08b0b02b40f3..2d4f64e9014ae168957113478edc11209cd76b64 100644
--- a/drivers/mmc/host/sdhci-of-arasan.c
+++ b/drivers/mmc/host/sdhci-of-arasan.c
@@ -1547,6 +1547,10 @@ static const struct of_device_id sdhci_arasan_of_match[] = {
 		.compatible = "arasan,sdhci-5.1",
 		.data = &sdhci_arasan_generic_data,
 	},
+	{
+		.compatible = "axiado,ax3000-sdhci-5.1-emmc",
+		.data = &sdhci_arasan_generic_data,
+	},
 	{
 		.compatible = "arasan,sdhci-4.9a",
 		.data = &sdhci_arasan_generic_data,
@@ -2019,15 +2023,17 @@ static int sdhci_arasan_probe(struct platform_device *pdev)
 			goto unreg_clk;
 		}
 
-		host->mmc_host_ops.hs400_enhanced_strobe =
+		if (!of_device_is_compatible(np, "axiado,ax3000-sdhci-5.1-emmc")) {
+			host->mmc_host_ops.hs400_enhanced_strobe =
 					sdhci_arasan_hs400_enhanced_strobe;
-		host->mmc_host_ops.start_signal_voltage_switch =
-					sdhci_arasan_voltage_switch;
-		sdhci_arasan->has_cqe = true;
-		host->mmc->caps2 |= MMC_CAP2_CQE;
+			host->mmc_host_ops.start_signal_voltage_switch =
+				sdhci_arasan_voltage_switch;
+			sdhci_arasan->has_cqe = true;
+			host->mmc->caps2 |= MMC_CAP2_CQE;
 
-		if (!of_property_read_bool(np, "disable-cqe-dcmd"))
-			host->mmc->caps2 |= MMC_CAP2_CQE_DCMD;
+			if (!of_property_read_bool(np, "disable-cqe-dcmd"))
+				host->mmc->caps2 |= MMC_CAP2_CQE_DCMD;
+		}
 	}
 
 	if (of_device_is_compatible(np, "xlnx,versal-net-emmc"))

-- 
2.48.1