linux-kernel - [PATCH 2/2] mmc: sdhci-iproc: Add support for the legacy sdhci controller on the BCM7211

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Date:   Wed,  2 Jun 2021 15:27:58 -0400
From:   Al Cooper <alcooperx@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Al Cooper <alcooperx@...il.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        bcm-kernel-feedback-list@...adcom.com, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-mmc@...r.kernel.org,
        Nicolas Saenz Julienne <nsaenz@...nel.org>,
        Ray Jui <rjui@...adcom.com>, Rob Herring <robh+dt@...nel.org>,
        Scott Branden <sbranden@...adcom.com>,
        Ulf Hansson <ulf.hansson@...aro.org>
Subject: [PATCH 2/2] mmc: sdhci-iproc: Add support for the legacy sdhci controller on the BCM7211

Add support for the legacy Arasan sdhci controller on the BCM7211 and
related SoC's. This includes adding a .shutdown callback to increase
the power savings during S5.

Signed-off-by: Al Cooper <alcooperx@...il.com>
---
 drivers/mmc/host/Kconfig       |  2 +-
 drivers/mmc/host/sdhci-iproc.c | 30 ++++++++++++++++++++++++++++++
 drivers/mmc/host/sdhci.h       |  2 ++
 3 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index a4d4c757eea0..561184fa7eb9 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -412,7 +412,7 @@ config MMC_SDHCI_MILBEAUT
 
 config MMC_SDHCI_IPROC
 	tristate "SDHCI support for the BCM2835 & iProc SD/MMC Controller"
-	depends on ARCH_BCM2835 || ARCH_BCM_IPROC || COMPILE_TEST
+	depends on ARCH_BCM2835 || ARCH_BCM_IPROC || ARCH_BRCMSTB || COMPILE_TEST
 	depends on MMC_SDHCI_PLTFM
 	depends on OF || ACPI
 	default ARCH_BCM_IPROC
diff --git a/drivers/mmc/host/sdhci-iproc.c b/drivers/mmc/host/sdhci-iproc.c
index ddeaf8e1f72f..cce390fe9cf3 100644
--- a/drivers/mmc/host/sdhci-iproc.c
+++ b/drivers/mmc/host/sdhci-iproc.c
@@ -286,11 +286,35 @@ static const struct sdhci_iproc_data bcm2711_data = {
 	.mmc_caps = MMC_CAP_3_3V_DDR,
 };
 
+static const struct sdhci_pltfm_data sdhci_bcm7211a0_pltfm_data = {
+	.quirks = SDHCI_QUIRK_MISSING_CAPS |
+		SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
+		SDHCI_QUIRK_BROKEN_DMA |
+		SDHCI_QUIRK_BROKEN_ADMA,
+	.ops = &sdhci_iproc_ops,
+};
+
+#define BCM7211A0_BASE_CLK_MHZ 100
+static const struct sdhci_iproc_data bcm7211a0_data = {
+	.pdata = &sdhci_bcm7211a0_pltfm_data,
+	.caps = ((BCM7211A0_BASE_CLK_MHZ / 2) << SDHCI_TIMEOUT_CLK_SHIFT) |
+		(BCM7211A0_BASE_CLK_MHZ << SDHCI_CLOCK_BASE_SHIFT) |
+		((0x2 << SDHCI_MAX_BLOCK_SHIFT)
+			& SDHCI_MAX_BLOCK_MASK) |
+		SDHCI_CAN_VDD_330 |
+		SDHCI_CAN_VDD_180 |
+		SDHCI_CAN_DO_SUSPEND |
+		SDHCI_CAN_DO_HISPD,
+	.caps1 = SDHCI_DRIVER_TYPE_C |
+		 SDHCI_DRIVER_TYPE_D,
+};
+
 static const struct of_device_id sdhci_iproc_of_match[] = {
 	{ .compatible = "brcm,bcm2835-sdhci", .data = &bcm2835_data },
 	{ .compatible = "brcm,bcm2711-emmc2", .data = &bcm2711_data },
 	{ .compatible = "brcm,sdhci-iproc-cygnus", .data = &iproc_cygnus_data},
 	{ .compatible = "brcm,sdhci-iproc", .data = &iproc_data },
+	{ .compatible = "brcm,bcm7211a0-sdhci", .data = &bcm7211a0_data },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, sdhci_iproc_of_match);
@@ -384,6 +408,11 @@ static int sdhci_iproc_probe(struct platform_device *pdev)
 	return ret;
 }
 
+static void sdhci_iproc_shutdown(struct platform_device *pdev)
+{
+	sdhci_pltfm_suspend(&pdev->dev);
+}
+
 static struct platform_driver sdhci_iproc_driver = {
 	.driver = {
 		.name = "sdhci-iproc",
@@ -394,6 +423,7 @@ static struct platform_driver sdhci_iproc_driver = {
 	},
 	.probe = sdhci_iproc_probe,
 	.remove = sdhci_pltfm_unregister,
+	.shutdown = sdhci_iproc_shutdown,
 };
 module_platform_driver(sdhci_iproc_driver);
 
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 0770c036e2ff..c35ed4be75b7 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -201,8 +201,10 @@
 
 #define SDHCI_CAPABILITIES	0x40
 #define  SDHCI_TIMEOUT_CLK_MASK		GENMASK(5, 0)
+#define  SDHCI_TIMEOUT_CLK_SHIFT 0
 #define  SDHCI_TIMEOUT_CLK_UNIT	0x00000080
 #define  SDHCI_CLOCK_BASE_MASK		GENMASK(13, 8)
+#define  SDHCI_CLOCK_BASE_SHIFT	8
 #define  SDHCI_CLOCK_V3_BASE_MASK	GENMASK(15, 8)
 #define  SDHCI_MAX_BLOCK_MASK	0x00030000
 #define  SDHCI_MAX_BLOCK_SHIFT  16
-- 
2.17.1