linux-kernel - [PATCH 7/7] ARM: OMAP2+: Add pdata-quirks for MMC/SD on DRA74x EVM

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Date:   Thu, 1 Jun 2017 20:04:01 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Tony Lindgren <tony@...mide.com>, Rob Herring <robh+dt@...nel.org>,
        <nsekhar@...com>
CC:     Russell King <linux@...linux.org.uk>, <linux-omap@...r.kernel.org>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-mmc@...r.kernel.org>,
        <kishon@...com>
Subject: [PATCH 7/7] ARM: OMAP2+: Add pdata-quirks for MMC/SD on DRA74x EVM

From: Sekhar Nori <nsekhar@...com>

DRA74x EVM Rev H EVM comes with revision 2.0 silicon.
However, earlier versions of EVM can come with either
revision 1.1 or revision 1.0 of silicon.

The device-tree file is written to support rev 2.0 of
silicon. pdata quirks are used to then override the
settings needed for PG 1.1 silicon.

PG 1.1 silicon has limitations w.r.t frequencies at
which MMC1/2/3 can operate as well as different IOdelay
numbers.

Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
Signed-off-by: Sekhar Nori <nsekhar@...com>
---
 arch/arm/mach-omap2/pdata-quirks.c       | 31 +++++++++++++++++++++++++++++++
 include/linux/platform_data/hsmmc-omap.h |  3 +++
 2 files changed, 34 insertions(+)

diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c
index 9700a8ef0f16..6b433fce65a5 100644
--- a/arch/arm/mach-omap2/pdata-quirks.c
+++ b/arch/arm/mach-omap2/pdata-quirks.c
@@ -434,6 +434,26 @@ static void __init omap5_uevm_legacy_init(void)
 }
 #endif
 
+#ifdef CONFIG_SOC_DRA7XX
+static struct omap_hsmmc_platform_data dra7_hsmmc_data_mmc1;
+static struct omap_hsmmc_platform_data dra7_hsmmc_data_mmc2;
+static struct omap_hsmmc_platform_data dra7_hsmmc_data_mmc3;
+
+static void __init dra7x_evm_mmc_quirk(void)
+{
+	if (omap_rev() == DRA752_REV_ES1_1 || omap_rev() == DRA752_REV_ES1_0) {
+		dra7_hsmmc_data_mmc1.version = "rev11";
+		dra7_hsmmc_data_mmc1.max_freq = 96000000;
+
+		dra7_hsmmc_data_mmc2.version = "rev11";
+		dra7_hsmmc_data_mmc2.max_freq = 48000000;
+
+		dra7_hsmmc_data_mmc3.version = "rev11";
+		dra7_hsmmc_data_mmc3.max_freq = 48000000;
+	}
+}
+#endif
+
 static struct pcs_pdata pcs_pdata;
 
 void omap_pcs_legacy_init(int irq, void (*rearm)(void))
@@ -561,6 +581,14 @@ static struct of_dev_auxdata omap_auxdata_lookup[] __initdata = {
 	OF_DEV_AUXDATA("ti,omap4-iommu", 0x55082000, "55082000.mmu",
 		       &omap4_iommu_pdata),
 #endif
+#ifdef CONFIG_SOC_DRA7XX
+	OF_DEV_AUXDATA("ti,dra7-hsmmc", 0x4809c000, "4809c000.mmc",
+		       &dra7_hsmmc_data_mmc1),
+	OF_DEV_AUXDATA("ti,dra7-hsmmc", 0x480b4000, "480b4000.mmc",
+		       &dra7_hsmmc_data_mmc2),
+	OF_DEV_AUXDATA("ti,dra7-hsmmc", 0x480ad000, "480ad000.mmc",
+		       &dra7_hsmmc_data_mmc3),
+#endif
 	/* Common auxdata */
 	OF_DEV_AUXDATA("pinctrl-single", 0, NULL, &pcs_pdata),
 	{ /* sentinel */ },
@@ -590,6 +618,9 @@ static struct pdata_init pdata_quirks[] __initdata = {
 #ifdef CONFIG_SOC_OMAP5
 	{ "ti,omap5-uevm", omap5_uevm_legacy_init, },
 #endif
+#ifdef CONFIG_SOC_DRA7XX
+	{ "ti,dra7-evm", dra7x_evm_mmc_quirk, },
+#endif
 	{ /* sentinel */ },
 };
 
diff --git a/include/linux/platform_data/hsmmc-omap.h b/include/linux/platform_data/hsmmc-omap.h
index 8e981be2e2c2..67bded22eae4 100644
--- a/include/linux/platform_data/hsmmc-omap.h
+++ b/include/linux/platform_data/hsmmc-omap.h
@@ -70,6 +70,9 @@ struct omap_hsmmc_platform_data {
 #define HSMMC_HAS_HSPE_SUPPORT	(1 << 2)
 	unsigned features;
 
+	/* string specifying a particular variant of hardware */
+	char *version;
+
 	int gpio_cd;			/* gpio (card detect) */
 	int gpio_cod;			/* gpio (cover detect) */
 	int gpio_wp;			/* gpio (write protect) */
-- 
2.11.0