DDR transfer modes include UHS-1 DDR50 and MMC HS-DDR (or MMC_DDR52). Consider MMC_DDR52 when setting clock delays.
Since MMC high speed mode goes up to 52 MHz instead of 50 MHz for SD, and this number is visible in the capability macro, increase the clock rate upper limit to 52 MHz. Signed-off-by: Chen-Yu Tsai <[email protected]> --- drivers/mmc/host/sunxi-mmc.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c index 765dfb9f77ec..fe6c171fd135 100644 --- a/drivers/mmc/host/sunxi-mmc.c +++ b/drivers/mmc/host/sunxi-mmc.c @@ -686,8 +686,9 @@ static int sunxi_mmc_clk_set_rate(struct sunxi_mmc_host *host, } else if (rate <= 25000000) { oclk_dly = host->clk_delays[SDXC_CLK_25M].output; sclk_dly = host->clk_delays[SDXC_CLK_25M].sample; - } else if (rate <= 50000000) { - if (ios->timing == MMC_TIMING_UHS_DDR50) { + } else if (rate <= 52000000) { + if (ios->timing == MMC_TIMING_UHS_DDR50 || + ios->timing == MMC_TIMING_MMC_DDR52) { oclk_dly = host->clk_delays[SDXC_CLK_50M_DDR].output; sclk_dly = host->clk_delays[SDXC_CLK_50M_DDR].sample; } else { @@ -762,7 +763,8 @@ static void sunxi_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) /* set ddr mode */ rval = mmc_readl(host, REG_GCTRL); - if (ios->timing == MMC_TIMING_UHS_DDR50) + if (ios->timing == MMC_TIMING_UHS_DDR50 || + ios->timing == MMC_TIMING_MMC_DDR52) rval |= SDXC_DDR_MODE; else rval &= ~SDXC_DDR_MODE; @@ -1106,9 +1108,9 @@ static int sunxi_mmc_probe(struct platform_device *pdev) mmc->max_segs = PAGE_SIZE / sizeof(struct sunxi_idma_des); mmc->max_seg_size = (1 << host->idma_des_size_bits); mmc->max_req_size = mmc->max_seg_size * mmc->max_segs; - /* 400kHz ~ 50MHz */ + /* 400kHz ~ 52MHz */ mmc->f_min = 400000; - mmc->f_max = 50000000; + mmc->f_max = 52000000; mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED | MMC_CAP_ERASE | MMC_CAP_SDIO_IRQ; -- 2.7.0 -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
