mmc: sdhci-omap: Add sdhci_omap specific ops for enable_sdio_irq

Add sdhci_omap_enable_sdio_irq to set CTPL and CLKEXTFREE bits in
MMCHS_CON register required to detect asynchronous card interrupt
on DAT[1].

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c
index b11c846..bd5e03d 100644 (file)
--- a/drivers/mmc/host/sdhci-omap.c
+++ b/drivers/mmc/host/sdhci-omap.c
@@ -36,6 +36,7 @@
 #define CON_DDR                        BIT(19)
 #define CON_CLKEXTFREE         BIT(16)
 #define CON_PADEN              BIT(15)
+#define CON_CTPL               BIT(11)
 #define CON_INIT               BIT(1)
 #define CON_OD                 BIT(0)
 
@@ -226,6 +227,23 @@ static void sdhci_omap_conf_bus_power(struct sdhci_omap_host *omap_host,
        }
 }
 
+static void sdhci_omap_enable_sdio_irq(struct mmc_host *mmc, int enable)
+{
+       struct sdhci_host *host = mmc_priv(mmc);
+       struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+       struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host);
+       u32 reg;
+
+       reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON);
+       if (enable)
+               reg |= (CON_CTPL | CON_CLKEXTFREE);
+       else
+               reg &= ~(CON_CTPL | CON_CLKEXTFREE);
+       sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg);
+
+       sdhci_enable_sdio_irq(mmc, enable);
+}
+
 static inline void sdhci_omap_set_dll(struct sdhci_omap_host *omap_host,
                                      int count)
 {
@@ -962,6 +980,7 @@ static int sdhci_omap_probe(struct platform_device *pdev)
        host->mmc_host_ops.set_ios = sdhci_omap_set_ios;
        host->mmc_host_ops.card_busy = sdhci_omap_card_busy;
        host->mmc_host_ops.execute_tuning = sdhci_omap_execute_tuning;
+       host->mmc_host_ops.enable_sdio_irq = sdhci_omap_enable_sdio_irq;
 
        ret = sdhci_setup_host(host);
        if (ret)