ARM: OMAP: hsmmc: add max_freq field

External circuitry like level shifters may limit the maximum operation
speed of the hsmmc controller. Add a field to struct omap2_hsmmc_info
so boards can adjust the setting on demand.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c
index 19dd165..9abab0f 100644 (file)
--- a/arch/arm/mach-omap2/hsmmc.c
+++ b/arch/arm/mach-omap2/hsmmc.c
@@ -316,6 +316,7 @@ static int omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c,
        mmc->slots[0].pm_caps = c->pm_caps;
        mmc->slots[0].internal_clock = !c->ext_clock;
        mmc->dma_mask = 0xffffffff;
+       mmc->max_freq = c->max_freq;
        if (cpu_is_omap44xx())
                mmc->reg_offset = OMAP4_MMC_REG_OFFSET;
        else

diff --git a/arch/arm/mach-omap2/hsmmc.h b/arch/arm/mach-omap2/hsmmc.h
index c440973..0017ae2 100644 (file)
--- a/arch/arm/mach-omap2/hsmmc.h
+++ b/arch/arm/mach-omap2/hsmmc.h
@@ -26,6 +26,8 @@ struct omap2_hsmmc_info {
        char    *name;          /* or NULL for default */
        struct device *dev;     /* returned: pointer to mmc adapter */
        int     ocr_mask;       /* temporary HACK */
+       int     max_freq;       /* maximum clock, if constrained by external
+                                * circuitry, or 0 for default */
        /* Remux (pad configuration) when powering on/off */
        void (*remux)(struct device *dev, int slot, int power_on);
        /* init some special card */

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index fd0c661..36e7f5b 100644 (file)
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -1912,8 +1912,12 @@ static int __init omap_hsmmc_probe(struct platform_device *pdev)
        if (mmc_slot(host).vcc_aux_disable_is_sleep)
                mmc_slot(host).no_off = 1;
 
-       mmc->f_min      = OMAP_MMC_MIN_CLOCK;
-       mmc->f_max      = OMAP_MMC_MAX_CLOCK;
+       mmc->f_min = OMAP_MMC_MIN_CLOCK;
+
+       if (pdata->max_freq > 0)
+               mmc->f_max = pdata->max_freq;
+       else
+               mmc->f_max = OMAP_MMC_MAX_CLOCK;
 
        spin_lock_init(&host->irq_lock);