mmc: sdhci: Add support for dt caps & caps mask

The sdhci capabilities registers can be incorrect. The
sdhci-caps-mask and sdhci-caps dt properties specify which bits of
the registers are incorrect and what their values should be. This
patch makes the sdhci driver use those properties to correct the caps.
Also use "dev_read_u64_default" instead of "dev_read_u32_array" for
caps mask.

Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 2779bca..fbc576f 100644 (file)
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -711,17 +711,19 @@ int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host,
 {
        u32 caps, caps_1 = 0;
 #if CONFIG_IS_ENABLED(DM_MMC)
-       u32 mask[2] = {0};
-       int ret;
-       ret = dev_read_u32_array(host->mmc->dev, "sdhci-caps-mask",
-                                mask, 2);
-       if (ret && ret != -1)
-               return ret;
-
-       caps = ~mask[1] & sdhci_readl(host, SDHCI_CAPABILITIES);
+       u64 dt_caps, dt_caps_mask;
+
+       dt_caps_mask = dev_read_u64_default(host->mmc->dev,
+                                           "sdhci-caps-mask", 0);
+       dt_caps = dev_read_u64_default(host->mmc->dev,
+                                      "sdhci-caps", 0);
+       caps = ~(u32)dt_caps_mask &
+              sdhci_readl(host, SDHCI_CAPABILITIES);
+       caps |= (u32)dt_caps;
 #else
        caps = sdhci_readl(host, SDHCI_CAPABILITIES);
 #endif
+       debug("%s, caps: 0x%x\n", __func__, caps);
 
 #ifdef CONFIG_MMC_SDHCI_SDMA
        if (!(caps & SDHCI_CAN_DO_SDMA)) {
@@ -762,10 +764,13 @@ int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host,
        /* Check whether the clock multiplier is supported or not */
        if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) {
 #if CONFIG_IS_ENABLED(DM_MMC)
-               caps_1 = ~mask[0] & sdhci_readl(host, SDHCI_CAPABILITIES_1);
+               caps_1 = ~(u32)(dt_caps_mask >> 32) &
+                        sdhci_readl(host, SDHCI_CAPABILITIES_1);
+               caps_1 |= (u32)(dt_caps >> 32);
 #else
                caps_1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
 #endif
+               debug("%s, caps_1: 0x%x\n", __func__, caps_1);
                host->clk_mul = (caps_1 & SDHCI_CLOCK_MUL_MASK) >>
                                SDHCI_CLOCK_MUL_SHIFT;
        }