[PATCH 4/4] MMC: omap_hsmmc: add DT property for max bus frequency

Daniel Mack
2012-10-12T10:58:15Z

Maximum bus frequency can be limited by external circuitry like level
shifters etc. Allow passing this value from DT.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Cc: Venkatraman S <svenkatr@ti.com>
Cc: Chris Ball <cjb@laptop.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: linux-omap@vger.kernel.org
---
drivers/mmc/host/omap_hsmmc.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 86f0759..4650ef7 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -1676,7 +1676,7 @@ static struct omap_mmc_platform_data *of_get_hsmmc_pdata(struct device *dev)
{
struct omap_mmc_platform_data *pdata;
struct device_node *np = dev->of_node;
- u32 bus_width;
+ u32 bus_width, max_freq;

pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
@@ -1703,6 +1703,9 @@ static struct omap_mmc_platform_data *of_get_hsmmc_pdata(struct device *dev)
if (of_find_property(np, "ti,needs-special-reset", NULL))
pdata->slots[0].features |= HSMMC_HAS_UPDATED_RESET;

+ if (!of_property_read_u32(np, "max-frequency", &max_freq))
+ pdata->max_freq = max_freq;
+
return pdata;
}
#else
--
1.7.11.4