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@gmail.com>
Link: https://lore.kernel.org/r/20210602192758.38735-2-alcooperx@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index a4d4c75..561184f 100644 (file)
--- 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 ddeaf8e..cce390f 100644 (file)
--- 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 @@ err:
        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 0770c03..c35ed4b 100644 (file)
--- 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