From d418ed87c4e3ecf45d42718c4ead91180997681f Mon Sep 17 00:00:00 2001 From: Daniel Mack Date: Sun, 19 Feb 2012 13:20:33 +0100 Subject: 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 Acked-by: Tony Lindgren Signed-off-by: Chris Ball --- arch/arm/mach-omap2/hsmmc.c | 1 + arch/arm/mach-omap2/hsmmc.h | 2 ++ drivers/mmc/host/omap_hsmmc.c | 8 ++++++-- 3 files changed, 9 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c index 19dd165..9abab0f 100644 --- 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 --- 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 --- 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); -- cgit v1.1