[PATCH] ARM: OMAP: hsmmc: add max_freq field
From: zonque@gmail.com (Daniel Mack)
Date: 2012-02-19 12:20:33
Also in:
linux-mmc, linux-omap
Subsystem:
arm port, multimedia card (mmc), secure digital (sd) and sdio subsystem, omap hs mmc support, omap2+ support, the rest · Maintainers:
Russell King, Ulf Hansson, Aaro Koskinen, Andreas Kemnade, Kevin Hilman, Roger Quadros, Tony Lindgren, Linus Torvalds
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> Cc: Chris Ball <redacted> Cc: Cousson, Benoit <redacted> --- This trivial patch is in my queue for some time already, and Tony acked on it awhile back. I was told to take Chris Ball in the loop as there is currently no OMAP MMC maintainer. This still applies cleanly to 3.3-rc4. Chris, can you queue this? 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 f4a1020..4c7bc36 100644
--- a/arch/arm/mach-omap2/hsmmc.c
+++ b/arch/arm/mach-omap2/hsmmc.c@@ -298,6 +298,7 @@ static int __init omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c, mmc->slots[0].caps = c->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 f757e78..65a8c12 100644
--- a/arch/arm/mach-omap2/hsmmc.h
+++ b/arch/arm/mach-omap2/hsmmc.h@@ -25,6 +25,8 @@ 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 101cd31..8215ef9 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c@@ -1927,8 +1927,12 @@ 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);
--
1.7.7.4