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@@ -36,6 +36,7 @@
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#include <dt-structs.h>
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#include <mapmem.h>
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#include <dm/ofnode.h>
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+#include <linux/iopoll.h>
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#if !CONFIG_IS_ENABLED(BLK)
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#include "mmc_private.h"
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@@ -631,6 +632,8 @@ static void set_sysctl(struct fsl_esdhc_priv *priv, struct mmc *mmc, uint clock)
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{
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struct fsl_esdhc *regs = priv->esdhc_regs;
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int div = 1;
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+ u32 tmp;
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+ int ret;
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#ifdef ARCH_MXC
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#ifdef CONFIG_MX53
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/* For i.MX53 eSDHCv3, SYSCTL.SDCLKFS may not be set to 0. */
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@@ -664,7 +667,9 @@ static void set_sysctl(struct fsl_esdhc_priv *priv, struct mmc *mmc, uint clock)
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esdhc_clrsetbits32(®s->sysctl, SYSCTL_CLOCK_MASK, clk);
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- udelay(10000);
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+ ret = readx_poll_timeout(esdhc_read32, ®s->prsstat, tmp, tmp & PRSSTAT_SDSTB, 100);
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+ if (ret)
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+ pr_warn("fsl_esdhc_imx: Internal clock never stabilised.\n");
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#ifdef CONFIG_FSL_USDHC
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esdhc_setbits32(®s->vendorspec, VENDORSPEC_PEREN | VENDORSPEC_CKEN);
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