diff options
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci_am654.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci_am654.c b/drivers/mmc/host/sdhci_am654.c index 2d38b1e12a7e..59c0c41b3739 100644 --- a/drivers/mmc/host/sdhci_am654.c +++ b/drivers/mmc/host/sdhci_am654.c @@ -240,6 +240,22 @@ static void sdhci_am654_write_b(struct sdhci_host *host, u8 val, int reg) writeb(val, host->ioaddr + reg); } +static int sdhci_am654_execute_tuning(struct mmc_host *mmc, u32 opcode) +{ + struct sdhci_host *host = mmc_priv(mmc); + int err = sdhci_execute_tuning(mmc, opcode); + + if (err) + return err; + /* + * Tuning data remains in the buffer after tuning. + * Do a command and data reset to get rid of it + */ + sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); + + return 0; +} + static struct sdhci_ops sdhci_am654_ops = { .get_max_clock = sdhci_pltfm_clk_get_max_clock, .get_timeout_clock = sdhci_pltfm_clk_get_max_clock, @@ -546,6 +562,8 @@ static int sdhci_am654_probe(struct platform_device *pdev) goto pm_runtime_put; } + host->mmc_host_ops.execute_tuning = sdhci_am654_execute_tuning; + ret = sdhci_am654_init(host); if (ret) goto pm_runtime_put; |