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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>
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1 changed files with 7 additions and 4 deletions
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@ -127,9 +127,9 @@ static int dw_mci_exynos_priv_init(struct dw_mci *host)
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static int dw_mci_exynos_setup_clock(struct dw_mci *host)
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static int dw_mci_exynos_setup_clock(struct dw_mci *host)
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{
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{
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struct dw_mci_exynos_priv_data *priv = host->priv;
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struct dw_mci_exynos_priv_data *priv = host->priv;
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unsigned long rate = clk_get_rate(host->ciu_clk);
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host->bus_hz = rate / (priv->ciu_div + 1);
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host->bus_hz /= (priv->ciu_div + 1);
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return 0;
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return 0;
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}
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}
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@ -232,8 +232,11 @@ static void dw_mci_exynos_set_ios(struct dw_mci *host, struct mmc_ios *ios)
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mci_writel(host, CLKSEL, priv->sdr_timing);
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mci_writel(host, CLKSEL, priv->sdr_timing);
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}
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}
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/* Don't care if wanted clock is zero */
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/*
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if (!wanted)
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* Don't care if wanted clock is zero or
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* ciu clock is unavailable
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*/
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if (!wanted || IS_ERR(host->ciu_clk))
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return;
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return;
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/* Guaranteed minimum frequency for cclkin */
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/* Guaranteed minimum frequency for cclkin */
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