On Thu, 23 Feb 2012 17:31:27 +0530, Rajendra Nayak rnayak@ti.com 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.
Signed-off-by: Rajendra Nayak rnayak@ti.com
.../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)
Binding looks okay. A couple comments below...
[...]
+static const struct of_device_id omap_mmc_of_match[];
If you move the omap_mmc_of_match[] table up to here then there is no need for the forward declaration.
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;
Blech on the ugly cast. It is slightly safer to do thusly:
u16 *offsetp = match->data; pdata->reg_offset = *offsetp
- }
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),}; -- 1.7.1
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