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

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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@xxxxxxxxx>
Cc: Venkatraman S <svenkatr@xxxxxx>
Cc: Chris Ball <cjb@xxxxxxxxxx>
Cc: Grant Likely <grant.likely@xxxxxxxxxxxx>
Cc: Rob Herring <rob.herring@xxxxxxxxxxx>
Cc: linux-omap@xxxxxxxxxxxxxxx
---
 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

--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Arm (vger)]     [ARM Kernel]     [ARM MSM]     [Linux Tegra]     [Linux WPAN Networking]     [Linux Wireless Networking]     [Maemo Users]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Trails]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux