diff options
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 23 | ||||
| -rw-r--r-- | drivers/mmc/host/sdhci.h | 1 |
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 40de56d6da0b..de833b1eadb9 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1653,6 +1653,29 @@ void sdhci_enable_clk(struct sdhci_host *host, u16 clk) udelay(10); } + if (host->version >= SDHCI_SPEC_410 && host->v4_mode) { + clk |= SDHCI_CLOCK_PLL_EN; + clk &= ~SDHCI_CLOCK_INT_STABLE; + sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); + + /* Wait max 150 ms */ + timeout = ktime_add_ms(ktime_get(), 150); + while (1) { + bool timedout = ktime_after(ktime_get(), timeout); + + clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); + if (clk & SDHCI_CLOCK_INT_STABLE) + break; + if (timedout) { + pr_err("%s: PLL clock never stabilised.\n", + mmc_hostname(host->mmc)); + sdhci_dumpregs(host); + return; + } + udelay(10); + } + } + clk |= SDHCI_CLOCK_CARD_EN; sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); } diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 902f855efe8f..929310e869a3 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -114,6 +114,7 @@ #define SDHCI_DIV_HI_MASK 0x300 #define SDHCI_PROG_CLOCK_MODE 0x0020 #define SDHCI_CLOCK_CARD_EN 0x0004 +#define SDHCI_CLOCK_PLL_EN 0x0008 #define SDHCI_CLOCK_INT_STABLE 0x0002 #define SDHCI_CLOCK_INT_EN 0x0001 |