Hi Adrian,
On 10/10/2016 3:16 PM, Adrian Hunter wrote:
On 05/10/16 17:40, Ritesh Harjani wrote:
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@xxxxxxxxxxxxxx>
Signed-off-by: Ritesh Harjani <riteshh@xxxxxxxxxxxxxx>
---
drivers/mmc/host/sdhci-msm.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index 042ecb2..4e17201 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -68,6 +68,7 @@
#define CORE_VENDOR_SPEC_CAPABILITIES0 0x11c
#define TCXO_FREQ 19200000
+#define SDHCI_MSM_MIN_CLOCK 400000
#define CDR_SELEXT_SHIFT 20
#define CDR_SELEXT_MASK (0xf << CDR_SELEXT_SHIFT)
@@ -561,6 +562,32 @@ 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);
+ int count;
+
+ if (msm_host->clk_table) {
I don't know if DT allows empty arrays, but if it does, might not
msm_host->clk_table_sz be zero here.
Sure, I will take care of this as mentioned in the response of previous
patch 03.
+ count = msm_host->clk_table_sz;
+ return msm_host->clk_table[count - 1];
+ } else {
'else' is redundant here.
Done. Will remove it.
+ return clk_round_rate(msm_host->clk, ULONG_MAX);
+ }
+}
+
+static unsigned int sdhci_msm_get_min_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);
+
+ if (msm_host->clk_table) {
Same about possibility of msm_host->clk_table_sz being zero.
Yes, as mentioned. Will take care of this.
+ return msm_host->clk_table[0];
+ } else {
'else' is redundant here.
Done.
+ return SDHCI_MSM_MIN_CLOCK;
+ }
+}
+
static const struct of_device_id sdhci_msm_dt_match[] = {
{ .compatible = "qcom,sdhci-msm-v4" },
{},
@@ -572,6 +599,8 @@ 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,
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