diff options
Diffstat (limited to 'drivers/mmc/omap_hsmmc.c')
| -rw-r--r-- | drivers/mmc/omap_hsmmc.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/drivers/mmc/omap_hsmmc.c b/drivers/mmc/omap_hsmmc.c index 2400db2..b8ab7bc 100644 --- a/drivers/mmc/omap_hsmmc.c +++ b/drivers/mmc/omap_hsmmc.c @@ -80,6 +80,11 @@ unsigned char mmc_board_init(struct mmc *mmc) writel(readl(&t2_base->devconf1) | MMCSDIO2ADPCLKISEL, &t2_base->devconf1); + /* Change from default of 52MHz to 26MHz if necessary */ + if (!(mmc->host_caps & MMC_MODE_HS_52MHz)) + writel(readl(&t2_base->ctl_prog_io1) & ~CTLPROGIO1SPEEDCTRL, + &t2_base->ctl_prog_io1); + writel(readl(&prcm_base->fclken1_core) | EN_MMC1 | EN_MMC2 | EN_MMC3, &prcm_base->fclken1_core); @@ -463,7 +468,7 @@ static void mmc_set_ios(struct mmc *mmc) writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl); } -int omap_mmc_init(int dev_index) +int omap_mmc_init(int dev_index, uint host_caps_mask, uint f_max) { struct mmc *mmc; @@ -494,11 +499,22 @@ int omap_mmc_init(int dev_index) return 1; } mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195; - mmc->host_caps = MMC_MODE_4BIT | MMC_MODE_HS_52MHz | MMC_MODE_HS | - MMC_MODE_HC; + mmc->host_caps = (MMC_MODE_4BIT | MMC_MODE_HS_52MHz | MMC_MODE_HS | + MMC_MODE_HC) & ~host_caps_mask; mmc->f_min = 400000; - mmc->f_max = 52000000; + + if (f_max != 0) + mmc->f_max = f_max; + else { + if (mmc->host_caps & MMC_MODE_HS) { + if (mmc->host_caps & MMC_MODE_HS_52MHz) + mmc->f_max = 52000000; + else + mmc->f_max = 26000000; + } else + mmc->f_max = 20000000; + } mmc->b_max = 0; |