The previous patch which implemented a DT binding for sdhci-tegra did not
allow all platform data fields to be initialized from DT. The following
were missing:
is_8bit: Implemented by this patch.
pm_flags: Not implemented yet. There are no mainline users of this field.
I'm not quite sure what it's for, and hence how to represent this
in DT; the value ends up being assigned to host->mmc->pm_caps.
While we're at it, fix the binding documentation to refer to "SD/MMC"
instead of "eSDHC", since that's the correct name; "eSDHC" was cut/paste
from the Freescale binding docs.
Signed-off-by: Stephen Warren <swarren@xxxxxxxxxx>
---
This should be able to go straight into the MMC -next branch
.../devicetree/bindings/mmc/nvidia-sdhci.txt | 6 ++++--
drivers/mmc/host/sdhci-tegra.c | 3 +++
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt b/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt
index c87f667..7e51154 100644
--- a/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt
+++ b/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt
@@ -5,13 +5,14 @@ and SDIO types of memory cards.
Required properties:
- compatible : Should be "nvidia,<chip>-sdhci"
-- reg : Should contain eSDHC registers location and length
-- interrupts : Should contain eSDHC interrupt
+- reg : Should contain SD/MMC registers location and length
+- interrupts : Should contain SD/MMC interrupt
Optional properties:
- cd-gpios : Specify GPIOs for card detection
- wp-gpios : Specify GPIOs for write protection
- power-gpios : Specify GPIOs for power control
+- support-8bit : Boolean, indicates if 8-bit mode should be used.
Example:
@@ -22,4 +23,5 @@ sdhci@c8000200 {
cd-gpios = <&gpio 69 0>; /* gpio PI5 */
wp-gpios = <&gpio 57 0>; /* gpio PH1 */
power-gpios = <&gpio 155 0>; /* gpio PT3 */
+ support-8bit;
};
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index 9ab18d6..67176af 100644
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -17,6 +17,7 @@
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/io.h>
+#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/gpio.h>
#include <linux/mmc/card.h>
@@ -153,6 +154,8 @@ static struct tegra_sdhci_platform_data * __devinit sdhci_tegra_dt_parse_pdata(
plat->cd_gpio = of_get_named_gpio(np, "cd-gpios", 0);
plat->wp_gpio = of_get_named_gpio(np, "wp-gpios", 0);
plat->power_gpio = of_get_named_gpio(np, "power-gpios", 0);
+ if (of_find_property(np, "support-8bit", NULL))
+ plat->is_8bit = 1;
return plat;
}
--
1.7.0.4
--
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