Add polling for ACK to be sure that data are written to PHY register.
Signed-off-by: Piotr Sroka <piotrs@xxxxxxxxxxx>
---
drivers/mmc/host/sdhci-cadence.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sdhci-cadence.c b/drivers/mmc/host/sdhci-cadence.c
index 4b0ecb9..c946e45 100644
--- a/drivers/mmc/host/sdhci-cadence.c
+++ b/drivers/mmc/host/sdhci-cadence.c
@@ -65,11 +65,12 @@ struct sdhci_cdns_priv {
void __iomem *hrs_addr;
};
-static void sdhci_cdns_write_phy_reg(struct sdhci_cdns_priv *priv,
+static int sdhci_cdns_write_phy_reg(struct sdhci_cdns_priv *priv,
u8 addr, u8 data)
{
void __iomem *reg = priv->hrs_addr + SDHCI_CDNS_HRS04;
u32 tmp;
+ int ret;
tmp = (data << SDHCI_CDNS_HRS04_WDATA_SHIFT) |
(addr << SDHCI_CDNS_HRS04_ADDR_SHIFT);
@@ -78,8 +79,14 @@ static void sdhci_cdns_write_phy_reg(struct sdhci_cdns_priv *priv,
tmp |= SDHCI_CDNS_HRS04_WR;
writel(tmp, reg);
+ ret = readl_poll_timeout(reg, tmp, tmp & SDHCI_CDNS_HRS04_ACK, 0, 10);
+ if (ret)
+ return ret;
+
tmp &= ~SDHCI_CDNS_HRS04_WR;
writel(tmp, reg);
+
+ return 0;
}
static void sdhci_cdns_phy_init(struct sdhci_cdns_priv *priv)
--
2.2.2
--
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