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Commit a2a1fed8 authored by Seungwon Jeon's avatar Seungwon Jeon Committed by Ulf Hansson
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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: default avatarSeungwon Jeon <tgih.jun@samsung.com>
Acked-by: default avatarJaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: default avatarAlim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 1a25b1b4

drivers/mmc/host/dw_mmc-exynos.c

+7 −4
Original line number Original line Diff line number Diff line
@@ -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)

static int dw_mci_exynos_setup_clock(struct dw_mci *host)

{

{

	struct dw_mci_exynos_priv_data *priv = host->priv;

	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;

	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);

			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;

		return;





	/* Guaranteed minimum frequency for cclkin */

	/* Guaranteed minimum frequency for cclkin */