From 5659eeaddd47982d03a19c651384456cc3164acc Mon Sep 17 00:00:00 2001 From: Jaehoon Chung Date: Thu, 31 Mar 2016 14:53:18 +0900 Subject: [PATCH] mmc: dw_mmc: exynos: add the function for controlling SMU Some of Exynos has the Security management Unit(SMU). This patch adds the function for controlling SMU. In future, if exynos needs to control SMU, it can be implemented in "config_smu" function, not "init" function. Signed-off-by: Jaehoon Chung Signed-off-by: Ulf Hansson --- drivers/mmc/host/dw_mmc-exynos.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c index 8790f2afc057..0e989eb25d12 100644 --- a/drivers/mmc/host/dw_mmc-exynos.c +++ b/drivers/mmc/host/dw_mmc-exynos.c @@ -91,10 +91,14 @@ static inline u8 dw_mci_exynos_get_ciu_div(struct dw_mci *host) return SDMMC_CLKSEL_GET_DIV(mci_readl(host, CLKSEL)) + 1; } -static int dw_mci_exynos_priv_init(struct dw_mci *host) +static void dw_mci_exynos_config_smu(struct dw_mci *host) { struct dw_mci_exynos_priv_data *priv = host->priv; + /* + * If Exynos is provided the Security management, + * set for non-ecryption mode at this time. + */ if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS5420_SMU || priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU) { mci_writel(host, MPSBEGIN0, 0); @@ -104,6 +108,13 @@ static int dw_mci_exynos_priv_init(struct dw_mci *host) SDMMC_MPSCTRL_VALID | SDMMC_MPSCTRL_NON_SECURE_WRITE_BIT); } +} + +static int dw_mci_exynos_priv_init(struct dw_mci *host) +{ + struct dw_mci_exynos_priv_data *priv = host->priv; + + dw_mci_exynos_config_smu(host); if (priv->ctrl_type >= DW_MCI_TYPE_EXYNOS5420) { priv->saved_strobe_ctrl = mci_readl(host, HS400_DLINE_CTRL); @@ -169,7 +180,7 @@ static int dw_mci_exynos_resume(struct device *dev) { struct dw_mci *host = dev_get_drvdata(dev); - dw_mci_exynos_priv_init(host); + dw_mci_exynos_config_smu(host); return dw_mci_resume(host); }