mmc: exynos_dw_mmc: Add support for ARM64 Exynos chips

Add the compatible entry and corresponding chip data for Exynos7
compatible chips, which covers modern ARM64 based Exynos chips. They
have some differences w.r.t. old ARM32 Exynos chips:
  - CLKSEL register offset is different
  - 64-bit IDMAC descriptor and 64-bit IDMAC registers are used
    (implemented in dw_mmc core driver)

In terms of the driver implementation, the CIU clock is obtained via CCF
framework (as opposed to ad-hoc clock driver implementation for ARM32
chips).

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

diff --git a/arch/arm/mach-exynos/include/mach/dwmmc.h b/arch/arm/mach-exynos/include/mach/dwmmc.h
index 811e9a04c6e31bd88ab1532ceb2ac7257c5f7723..7cb71be0d9fd5cbbfc03d26a6f23a7671d5fc661 100644 (file)
--- a/arch/arm/mach-exynos/include/mach/dwmmc.h
+++ b/arch/arm/mach-exynos/include/mach/dwmmc.h
@@ -8,6 +8,7 @@
 #define __ASM_ARM_ARCH_DWMMC_H
 
 #define DWMCI_CLKSEL           0x09C
+#define DWMCI_CLKSEL64         0x0a8
 #define DWMCI_SET_SAMPLE_CLK(x)        (x)
 #define DWMCI_SET_DRV_CLK(x)   ((x) << 16)
 #define DWMCI_SET_DIV_RATIO(x) ((x) << 24)

diff --git a/drivers/mmc/exynos_dw_mmc.c b/drivers/mmc/exynos_dw_mmc.c
index ee3ae9f5e65064323ca19a53270c5f5aa5b5027e..29241edf79155e54b2d6582285b61142bb8ae1f5 100644 (file)
--- a/drivers/mmc/exynos_dw_mmc.c
+++ b/drivers/mmc/exynos_dw_mmc.c
@@ -385,6 +385,11 @@ static const struct exynos_dwmmc_variant exynos5_drv_data = {
 #endif
 };
 
+static const struct exynos_dwmmc_variant exynos7_smu_drv_data = {
+       .clksel = DWMCI_CLKSEL64,
+       .quirks = DWMCI_QUIRK_DISABLE_SMU,
+};
+
 static const struct udevice_id exynos_dwmmc_ids[] = {
        {
                .compatible     = "samsung,exynos4412-dw-mshc",
@@ -392,6 +397,9 @@ static const struct udevice_id exynos_dwmmc_ids[] = {
        }, {
                .compatible     = "samsung,exynos-dwmmc",
                .data           = (ulong)&exynos5_drv_data,
+       }, {
+               .compatible     = "samsung,exynos7-dw-mshc-smu",
+               .data           = (ulong)&exynos7_smu_drv_data,
        },
        { }
 };