linux-kernel - [PATCH 2/6] mmc: sdhci-cadence: add Mobileye eyeQ support

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Message-ID: <e97f409650495791e07484589e1666ead570fa12.1750156323.git.benoit.monin@bootlin.com>
Date: Tue, 17 Jun 2025 15:25:52 +0200
From: Benoît Monin <benoit.monin@...tlin.com>
To: Ulf Hansson <ulf.hansson@...aro.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Vladimir Kondratiev <vladimir.kondratiev@...ileye.com>,
	Gregory CLEMENT <gregory.clement@...tlin.com>,
	Théo Lebrun <theo.lebrun@...tlin.com>,
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc: Benoît Monin <benoit.monin@...tlin.com>,
	linux-mmc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-mips@...r.kernel.org,
	"Thomas Petazzoni" <thomas.petazzoni@...tlin.com>
Subject: [PATCH 2/6] mmc: sdhci-cadence: add Mobileye eyeQ support

The MMC/SDHCI controller implemented by Mobileye needs the preset value
quirks to configure the clock properly at speed slower than HS200.
It otherwise works as a standard sd4hc controller.

Signed-off-by: Benoît Monin <benoit.monin@...tlin.com>
---
 drivers/mmc/host/sdhci-cadence.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/mmc/host/sdhci-cadence.c b/drivers/mmc/host/sdhci-cadence.c
index a94b297fcf2a..60ca09780da3 100644
--- a/drivers/mmc/host/sdhci-cadence.c
+++ b/drivers/mmc/host/sdhci-cadence.c
@@ -433,6 +433,13 @@ static const struct sdhci_cdns_drv_data sdhci_elba_drv_data = {
 	},
 };
 
+static const struct sdhci_cdns_drv_data sdhci_eyeq_drv_data = {
+	.pltfm_data = {
+		.ops = &sdhci_cdns_ops,
+		.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
+	},
+};
+
 static const struct sdhci_cdns_drv_data sdhci_cdns_drv_data = {
 	.pltfm_data = {
 		.ops = &sdhci_cdns_ops,
@@ -595,6 +602,10 @@ static const struct of_device_id sdhci_cdns_match[] = {
 		.compatible = "amd,pensando-elba-sd4hc",
 		.data = &sdhci_elba_drv_data,
 	},
+	{
+		.compatible = "mobileye,eyeq-sd4hc",
+		.data = &sdhci_eyeq_drv_data,
+	},
 	{ .compatible = "cdns,sd4hc" },
 	{ /* sentinel */ }
 };