mmc: sdhci-msm: Add get_min_clock() and get_max_clock() callback

This add get_min_clock() and get_max_clock() callback
for sdhci-msm. sdhci-msm min/max clocks may be different
hence implement these callbacks.

Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index fc093b8dd37a0c207c1c1aed519e8bb77f557f8c..aaeaf475e39545160d6822683be7cdfdab451fdb 100644 (file)
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -68,6 +68,8 @@
 
 #define CORE_VENDOR_SPEC_CAPABILITIES0 0x11c
 
+#define SDHCI_MSM_MIN_CLOCK    400000
+
 #define CDR_SELEXT_SHIFT       20
 #define CDR_SELEXT_MASK                (0xf << CDR_SELEXT_SHIFT)
 #define CMUX_SHIFT_PHASE_SHIFT 24
@@ -556,6 +558,19 @@ static irqreturn_t sdhci_msm_pwr_irq(int irq, void *data)
        return IRQ_HANDLED;
 }
 
+static unsigned int sdhci_msm_get_max_clock(struct sdhci_host *host)
+{
+       struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+       struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
+
+       return clk_round_rate(msm_host->clk, ULONG_MAX);
+}
+
+static unsigned int sdhci_msm_get_min_clock(struct sdhci_host *host)
+{
+       return SDHCI_MSM_MIN_CLOCK;
+}
+
 static const struct of_device_id sdhci_msm_dt_match[] = {
        { .compatible = "qcom,sdhci-msm-v4" },
        {},
@@ -567,6 +582,8 @@ static const struct sdhci_ops sdhci_msm_ops = {
        .platform_execute_tuning = sdhci_msm_execute_tuning,
        .reset = sdhci_reset,
        .set_clock = sdhci_set_clock,
+       .get_min_clock = sdhci_msm_get_min_clock,
+       .get_max_clock = sdhci_msm_get_max_clock,
        .set_bus_width = sdhci_set_bus_width,
        .set_uhs_signaling = sdhci_msm_set_uhs_signaling,
        .voltage_switch = sdhci_msm_voltage_switch,