This patch is to expose the SDCLK frequency in the ios /sys entry. For example, if the max clk for a normal speed card is 20MHz this will be reported in /sys/kernel/debug/mmc0/ios instead of the real SDCLK frequency (calculated as Baseclock / divisor; divisor used for programming the Clock Control Register). Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@xxxxxx> --- drivers/mmc/host/sdhci.c | 9 ++++++++- 1 files changed, 8 insertions(+), 1 deletions(-) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 0e02cc1..6bdf64f 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1045,6 +1045,7 @@ static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock) int div = 0; /* Initialized for compiler warning */ u16 clk = 0; unsigned long timeout; + unsigned int new_hc_clock = host->max_clk; if (clock == host->clock) return; @@ -1134,7 +1135,10 @@ static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock) sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); out: - host->clock = clock; + if (div) + new_hc_clock = host->max_clk / div; + + host->clock = new_hc_clock; } static void sdhci_set_power(struct sdhci_host *host, unsigned short power) @@ -1293,6 +1297,9 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) sdhci_set_clock(host, ios->clock); + /* Clock provided to the HC */ + ios->clock = host->clock; + if (ios->power_mode == MMC_POWER_OFF) sdhci_set_power(host, -1); else -- 1.7.4.4 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
