mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
mmc: dw_mmc: exynos: don't use if clock isn't available
Add checking whether the clock is valid. Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Acked-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
parent
1a25b1b419
commit
a2a1fed8ea
1 changed files with 7 additions and 4 deletions
|
@ -127,9 +127,9 @@ static int dw_mci_exynos_priv_init(struct dw_mci *host)
|
|||
static int dw_mci_exynos_setup_clock(struct dw_mci *host)
|
||||
{
|
||||
struct dw_mci_exynos_priv_data *priv = host->priv;
|
||||
unsigned long rate = clk_get_rate(host->ciu_clk);
|
||||
|
||||
host->bus_hz = rate / (priv->ciu_div + 1);
|
||||
host->bus_hz /= (priv->ciu_div + 1);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
@ -232,8 +232,11 @@ static void dw_mci_exynos_set_ios(struct dw_mci *host, struct mmc_ios *ios)
|
|||
mci_writel(host, CLKSEL, priv->sdr_timing);
|
||||
}
|
||||
|
||||
/* Don't care if wanted clock is zero */
|
||||
if (!wanted)
|
||||
/*
|
||||
* Don't care if wanted clock is zero or
|
||||
* ciu clock is unavailable
|
||||
*/
|
||||
if (!wanted || IS_ERR(host->ciu_clk))
|
||||
return;
|
||||
|
||||
/* Guaranteed minimum frequency for cclkin */
|
||||
|
|
Loading…
Reference in a new issue