mmc: sdhci-of-arasan: Add Support for AM654 MMC and PHY

The current arasan sdhci PHY configuration isn't compatible
with the PHY on TI's AM654 devices.

Therefore, add a new compatible, AM654 specific quirks
and a new AM654 specific set_clock function which
configures the PHY in a sane way.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
index c9e3e05..142c4b8 100644 (file)
--- a/drivers/mmc/host/sdhci-of-arasan.c
+++ b/drivers/mmc/host/sdhci-of-arasan.c
@@ -231,6 +231,25 @@ static void sdhci_arasan_set_clock(struct sdhci_host *host, unsigned int clock)
        }
 }
 
+static void sdhci_arasan_am654_set_clock(struct sdhci_host *host,
+                                        unsigned int clock)
+{
+       struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+       struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
+
+       if (sdhci_arasan->is_phy_on) {
+               phy_power_off(sdhci_arasan->phy);
+               sdhci_arasan->is_phy_on = false;
+       }
+
+       sdhci_set_clock(host, clock);
+
+       if (clock > PHY_CLK_TOO_SLOW_HZ) {
+               phy_power_on(sdhci_arasan->phy);
+               sdhci_arasan->is_phy_on = true;
+       }
+}
+
 static void sdhci_arasan_hs400_enhanced_strobe(struct mmc_host *mmc,
                                        struct mmc_ios *ios)
 {
@@ -316,6 +335,29 @@ static struct sdhci_arasan_of_data sdhci_arasan_data = {
        .pdata = &sdhci_arasan_pdata,
 };
 
+static const struct sdhci_ops sdhci_arasan_am654_ops = {
+       .set_clock = sdhci_arasan_am654_set_clock,
+       .get_max_clock = sdhci_pltfm_clk_get_max_clock,
+       .get_timeout_clock = sdhci_pltfm_clk_get_max_clock,
+       .set_bus_width = sdhci_set_bus_width,
+       .reset = sdhci_arasan_reset,
+       .set_uhs_signaling = sdhci_set_uhs_signaling,
+};
+
+static const struct sdhci_pltfm_data sdhci_arasan_am654_pdata = {
+       .ops = &sdhci_arasan_am654_ops,
+       .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN  |
+                 SDHCI_QUIRK_INVERTED_WRITE_PROTECT |
+                 SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12,
+       .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
+                  SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
+                  SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
+};
+
+static const struct sdhci_arasan_of_data sdhci_arasan_am654_data = {
+       .pdata = &sdhci_arasan_am654_pdata,
+};
+
 static u32 sdhci_arasan_cqhci_irq(struct sdhci_host *host, u32 intmask)
 {
        int cmd_error = 0;
@@ -478,6 +520,10 @@ static const struct of_device_id sdhci_arasan_of_match[] = {
                .compatible = "rockchip,rk3399-sdhci-5.1",
                .data = &sdhci_arasan_rk3399_data,
        },
+       {
+               .compatible = "ti,am654-sdhci-5.1",
+               .data = &sdhci_arasan_am654_data,
+       },
        /* Generic compatible below here */
        {
                .compatible = "arasan,sdhci-8.9a",