Hi Rob/Grant,
On Thursday 23 February 2012 05:31 PM, Rajendra Nayak wrote:
Define dt bindings for the ti-omap-hsmmc, and adapt
the driver to extract data (which was earlier passed as
platform_data) from device tree.
Any comments on these bindings for omap hsmmc? All the dependent
patches/series on which this series was based have now made it to
the respective -next of Mark and Chris.
regards,
Rajendra
Signed-off-by: Rajendra Nayak<rnayak@xxxxxx>
---
.../devicetree/bindings/mmc/ti-omap-hsmmc.txt | 31 +++++++++
drivers/mmc/host/omap_hsmmc.c | 68 ++++++++++++++++++++
2 files changed, 99 insertions(+), 0 deletions(-)
create mode 100644 Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
diff --git a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
new file mode 100644
index 0000000..e4fa8f0
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
@@ -0,0 +1,31 @@
+* TI Highspeed MMC host controller for OMAP
+
+The Highspeed MMC Host Controller on TI OMAP family
+provides an interface for MMC, SD, and SDIO types of memory cards.
+
+Required properties:
+- compatible:
+ Should be "ti,omap2-hsmmc", for OMAP2/3 controllers
+ Should be "ti,omap4-hsmmc", for OMAP4 controllers
+- ti,hwmods: Must be "mmc<n>", n is controller instance starting 1
+- reg : should contain hsmmc registers location and length
+
+Optional properties:
+ti,dual-volt: boolean, supports dual voltage cards
+<supply-name>-supply: phandle to the regulator device tree node
+"supply-name" examples are "vmmc", "vmmc_aux" etc
+ti,bus-width: Number of data lines, default assumed is 1 if the property is missing.
+cd-gpios: GPIOs for card detection
+wp-gpios: GPIOs for write protection
+ti,non-removable: non-removable slot (like eMMC)
+
+Example:
+ mmc1: mmc@0x4809c000 {
+ compatible = "ti,omap4-hsmmc";
+ reg =<0x4809c000 0x400>;
+ ti,hwmods = "mmc1";
+ ti,dual-volt;
+ ti,bus-width =<4>;
+ vmmc-supply =<&vmmc>; /* phandle to regulator node */
+ ti,non-removable;
+ };
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 35f6dc1..0c93d58 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -26,6 +26,9 @@
#include<linux/platform_device.h>
#include<linux/timer.h>
#include<linux/clk.h>
+#include<linux/of.h>
+#include<linux/of_gpio.h>
+#include<linux/of_device.h>
#include<linux/mmc/host.h>
#include<linux/mmc/core.h>
#include<linux/mmc/mmc.h>
@@ -1718,6 +1721,46 @@ static void omap_hsmmc_debugfs(struct mmc_host *mmc)
#endif
+#ifdef CONFIG_OF
+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;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return NULL; /* out of memory */
+
+ if (of_find_property(np, "ti,dual-volt", NULL))
+ pdata->controller_flags |= OMAP_HSMMC_SUPPORTS_DUAL_VOLT;
+
+ /* This driver only supports 1 slot */
+ pdata->nr_slots = 1;
+ pdata->slots[0].switch_pin = of_get_named_gpio(np, "cd-gpios", 0);
+ pdata->slots[0].gpio_wp = of_get_named_gpio(np, "wp-gpios", 0);
+
+ if (of_find_property(np, "ti,non-removable", NULL)) {
+ pdata->slots[0].nonremovable = true;
+ pdata->slots[0].no_regulator_off_init = true;
+ }
+ of_property_read_u32(np, "ti,bus-width",&bus_width);
+ if (bus_width == 4)
+ pdata->slots[0].caps |= MMC_CAP_4_BIT_DATA;
+ else if (bus_width == 8)
+ pdata->slots[0].caps |= MMC_CAP_8_BIT_DATA;
+ return pdata;
+}
+#else
+static inline struct omap_mmc_platform_data
+ *of_get_hsmmc_pdata(struct device *dev)
+{
+ return NULL;
+}
+#endif
+
+static const struct of_device_id omap_mmc_of_match[];
+
static int __init omap_hsmmc_probe(struct platform_device *pdev)
{
struct omap_mmc_platform_data *pdata = pdev->dev.platform_data;
@@ -1725,6 +1768,14 @@ static int __init omap_hsmmc_probe(struct platform_device *pdev)
struct omap_hsmmc_host *host = NULL;
struct resource *res;
int ret, irq;
+ const struct of_device_id *match;
+
+ match = of_match_device(omap_mmc_of_match,&pdev->dev);
+ if (match) {
+ pdata = of_get_hsmmc_pdata(&pdev->dev);
+ if (match->data)
+ pdata->reg_offset = *(u16 *)match->data;
+ }
if (pdata == NULL) {
dev_err(&pdev->dev, "Platform Data is missing\n");
@@ -2120,12 +2171,29 @@ static struct dev_pm_ops omap_hsmmc_dev_pm_ops = {
.runtime_resume = omap_hsmmc_runtime_resume,
};
+#if defined(CONFIG_OF)
+static u16 omap4_reg_offset = 0x100;
+
+static const struct of_device_id omap_mmc_of_match[] = {
+ {
+ .compatible = "ti,omap2-hsmmc",
+ },
+ {
+ .compatible = "ti,omap4-hsmmc",
+ .data =&omap4_reg_offset,
+ },
+ {},
+}
+MODULE_DEVICE_TABLE(of, omap_mmc_of_match);
+#endif
+
static struct platform_driver omap_hsmmc_driver = {
.remove = omap_hsmmc_remove,
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
.pm =&omap_hsmmc_dev_pm_ops,
+ .of_match_table = of_match_ptr(omap_mmc_of_match),
},
};
--
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