diff options
Diffstat (limited to 'drivers/mmc/host/sdhci-of-arasan.c')
-rw-r--r-- | drivers/mmc/host/sdhci-of-arasan.c | 36 |
1 files changed, 33 insertions, 3 deletions
diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c index 3b8d456e857d..fc38db64a6b4 100644 --- a/drivers/mmc/host/sdhci-of-arasan.c +++ b/drivers/mmc/host/sdhci-of-arasan.c @@ -159,6 +159,12 @@ struct sdhci_arasan_data { /* Controller immediately reports SDHCI_CLOCK_INT_STABLE after enabling the * internal clock even when the clock isn't stable */ #define SDHCI_ARASAN_QUIRK_CLOCK_UNSTABLE BIT(1) +/* + * Some of the Arasan variations might not have timing requirements + * met at 25MHz for Default Speed mode, those controllers work at + * 19MHz instead + */ +#define SDHCI_ARASAN_QUIRK_CLOCK_25_BROKEN BIT(2) }; struct sdhci_arasan_of_data { @@ -267,7 +273,12 @@ static void sdhci_arasan_set_clock(struct sdhci_host *host, unsigned int clock) * through low speeds without power cycling. */ sdhci_set_clock(host, host->max_clk); - phy_power_on(sdhci_arasan->phy); + if (phy_power_on(sdhci_arasan->phy)) { + pr_err("%s: Cannot power on phy.\n", + mmc_hostname(host->mmc)); + return; + } + sdhci_arasan->is_phy_on = true; /* @@ -290,6 +301,16 @@ static void sdhci_arasan_set_clock(struct sdhci_host *host, unsigned int clock) sdhci_arasan->is_phy_on = false; } + if (sdhci_arasan->quirks & SDHCI_ARASAN_QUIRK_CLOCK_25_BROKEN) { + /* + * Some of the Arasan variations might not have timing + * requirements met at 25MHz for Default Speed mode, + * those controllers work at 19MHz instead. + */ + if (clock == DEFAULT_SPEED_MAX_DTR) + clock = (DEFAULT_SPEED_MAX_DTR * 19) / 25; + } + /* Set the Input and Output Clock Phase Delays */ if (clk_data->set_clk_delays) clk_data->set_clk_delays(host); @@ -307,7 +328,12 @@ static void sdhci_arasan_set_clock(struct sdhci_host *host, unsigned int clock) msleep(20); if (ctrl_phy) { - phy_power_on(sdhci_arasan->phy); + if (phy_power_on(sdhci_arasan->phy)) { + pr_err("%s: Cannot power on phy.\n", + mmc_hostname(host->mmc)); + return; + } + sdhci_arasan->is_phy_on = true; } } @@ -463,7 +489,9 @@ static int sdhci_arasan_suspend(struct device *dev) ret = phy_power_off(sdhci_arasan->phy); if (ret) { dev_err(dev, "Cannot power off phy.\n"); - sdhci_resume_host(host); + if (sdhci_resume_host(host)) + dev_err(dev, "Cannot resume host.\n"); + return ret; } sdhci_arasan->is_phy_on = false; @@ -1598,6 +1626,8 @@ static int sdhci_arasan_probe(struct platform_device *pdev) if (of_device_is_compatible(np, "xlnx,zynqmp-8.9a")) { host->mmc_host_ops.execute_tuning = arasan_zynqmp_execute_tuning; + + sdhci_arasan->quirks |= SDHCI_ARASAN_QUIRK_CLOCK_25_BROKEN; } arasan_dt_parse_clk_phases(&pdev->dev, &sdhci_arasan->clk_data); |