Set the clock rate of the functional clock to the max frequency
that is passed to the driver either using pdata or dt.
Also remove unnecessary setting of host->fclk to NULL.
Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx>
---
drivers/mmc/host/omap_hsmmc.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 7dac486..60c1ac2 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -2149,6 +2149,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
struct omap_hsmmc_host *host = NULL;
struct resource *res;
int ret, irq;
+ unsigned int freq;
const struct of_device_id *match;
dma_cap_mask_t mask;
unsigned tx_req, rx_req;
@@ -2229,10 +2230,20 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
host->fclk = devm_clk_get(&pdev->dev, "fck");
if (IS_ERR(host->fclk)) {
ret = PTR_ERR(host->fclk);
- host->fclk = NULL;
goto err1;
}
+ freq = clk_get_rate(host->fclk);
+ if (freq > mmc->f_max) {
+ mmc->f_max = freq;
+ } else {
+ ret = clk_set_rate(host->fclk, mmc->f_max);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to set clock to %d\n", mmc->f_max);
+ goto err1;
+ }
+ }
+
if (host->pdata->controller_flags & OMAP_HSMMC_BROKEN_MULTIBLOCK_READ) {
dev_info(&pdev->dev, "multiblock reads disabled due to 35xx erratum 2.1.1.128; MMC read performance may suffer\n");
omap_hsmmc_ops.multi_io_quirk = omap_hsmmc_multi_io_quirk;
--
1.7.9.5
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