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[2/4] MMC: omap_hsmmc: add DT property for max bus frequency

Message ID 1350317108-10657-2-git-send-email-svenkatr@ti.com (mailing list archive)
State New, archived
Headers show

Commit Message

Venkatraman S Oct. 15, 2012, 4:05 p.m. UTC 
From: Daniel Mack <zonque@gmail.com>

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
Signed-off-by: Venkatraman S <svenkatr@ti.com>
---
 drivers/mmc/host/omap_hsmmc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Comments

Chris Ball Oct. 29, 2012, 4:56 p.m. UTC | #1 
Hi,

On Mon, Oct 15 2012, Venkatraman S wrote:
> From: Daniel Mack <zonque@gmail.com>
>
> 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>

Thanks, pushed to mmc-next for 3.8.

- Chris.
diff mbox

Patch

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 01eeeae..a33ab74 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -1674,7 +1674,7 @@  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)
@@ -1701,6 +1701,9 @@  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