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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>
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d418ed87c4
3 changed files with 9 additions and 2 deletions
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@ -316,6 +316,7 @@ static int omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c,
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mmc->slots[0].pm_caps = c->pm_caps;
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mmc->slots[0].internal_clock = !c->ext_clock;
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mmc->dma_mask = 0xffffffff;
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mmc->max_freq = c->max_freq;
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if (cpu_is_omap44xx())
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mmc->reg_offset = OMAP4_MMC_REG_OFFSET;
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else
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@ -26,6 +26,8 @@ struct omap2_hsmmc_info {
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char *name; /* or NULL for default */
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struct device *dev; /* returned: pointer to mmc adapter */
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int ocr_mask; /* temporary HACK */
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int max_freq; /* maximum clock, if constrained by external
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* circuitry, or 0 for default */
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/* Remux (pad configuration) when powering on/off */
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void (*remux)(struct device *dev, int slot, int power_on);
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/* init some special card */
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@ -1912,8 +1912,12 @@ static int __init omap_hsmmc_probe(struct platform_device *pdev)
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if (mmc_slot(host).vcc_aux_disable_is_sleep)
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mmc_slot(host).no_off = 1;
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mmc->f_min = OMAP_MMC_MIN_CLOCK;
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mmc->f_max = OMAP_MMC_MAX_CLOCK;
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mmc->f_min = OMAP_MMC_MIN_CLOCK;
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if (pdata->max_freq > 0)
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mmc->f_max = pdata->max_freq;
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else
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mmc->f_max = OMAP_MMC_MAX_CLOCK;
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spin_lock_init(&host->irq_lock);
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