diff options
| author | Viresh Kumar <viresh.kumar@linaro.org> | 2012-09-28 15:58:22 +0530 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2012-10-07 17:41:44 -0400 |
| commit | 067bf748bde70154a1fe1734b01f82b827c65b23 (patch) | |
| tree | 1890041b7285676be8b783abafa9d9d52296fcdf /drivers/mmc/host/sdhci-spear.c | |
| parent | 2abeb5c5ded2e7f7d288058426fb0ae852adc77f (diff) | |
| download | lwn-067bf748bde70154a1fe1734b01f82b827c65b23.tar.gz lwn-067bf748bde70154a1fe1734b01f82b827c65b23.zip | |
mmc: sdhci-spear: add device tree bindings
This adds simple DT bindings for SDHCI SPEAr controller. It uses cd-gpios
from common mmc bindings.
This also fixes spear300-evb.dts with correct name for card detect binding.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host/sdhci-spear.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-spear.c | 57 |
1 files changed, 55 insertions, 2 deletions
diff --git a/drivers/mmc/host/sdhci-spear.c b/drivers/mmc/host/sdhci-spear.c index 423da8194cd8..ecad282741d6 100644 --- a/drivers/mmc/host/sdhci-spear.c +++ b/drivers/mmc/host/sdhci-spear.c @@ -20,6 +20,8 @@ #include <linux/module.h> #include <linux/interrupt.h> #include <linux/irq.h> +#include <linux/of.h> +#include <linux/of_gpio.h> #include <linux/platform_device.h> #include <linux/pm.h> #include <linux/slab.h> @@ -68,8 +70,42 @@ static irqreturn_t sdhci_gpio_irq(int irq, void *dev_id) return IRQ_HANDLED; } +#ifdef CONFIG_OF +static struct sdhci_plat_data * __devinit +sdhci_probe_config_dt(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct sdhci_plat_data *pdata = NULL; + int cd_gpio; + + cd_gpio = of_get_named_gpio(np, "cd-gpios", 0); + if (!gpio_is_valid(cd_gpio)) + cd_gpio = -1; + + /* If pdata is required */ + if (cd_gpio != -1) { + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) { + dev_err(&pdev->dev, "DT: kzalloc failed\n"); + return ERR_PTR(-ENOMEM); + } + } + + pdata->card_int_gpio = cd_gpio; + + return pdata; +} +#else +static struct sdhci_plat_data * __devinit +sdhci_probe_config_dt(struct platform_device *pdev) +{ + return ERR_PTR(-ENOSYS); +} +#endif + static int __devinit sdhci_probe(struct platform_device *pdev) { + struct device_node *np = pdev->dev.of_node; struct sdhci_host *host; struct resource *iomem; struct spear_sdhci *sdhci; @@ -110,8 +146,16 @@ static int __devinit sdhci_probe(struct platform_device *pdev) goto put_clk; } - /* overwrite platform_data */ - sdhci->data = dev_get_platdata(&pdev->dev); + if (np) { + sdhci->data = sdhci_probe_config_dt(pdev); + if (IS_ERR(sdhci->data)) { + dev_err(&pdev->dev, "DT: Failed to get pdata\n"); + return -ENODEV; + } + } else { + sdhci->data = dev_get_platdata(&pdev->dev); + } + pdev->dev.platform_data = sdhci; if (pdev->dev.parent) @@ -276,11 +320,20 @@ static int sdhci_resume(struct device *dev) static SIMPLE_DEV_PM_OPS(sdhci_pm_ops, sdhci_suspend, sdhci_resume); +#ifdef CONFIG_OF +static const struct of_device_id sdhci_spear_id_table[] = { + { .compatible = "st,spear300-sdhci" }, + {} +}; +MODULE_DEVICE_TABLE(of, sdhci_spear_id_table); +#endif + static struct platform_driver sdhci_driver = { .driver = { .name = "sdhci", .owner = THIS_MODULE, .pm = &sdhci_pm_ops, + .of_match_table = of_match_ptr(sdhci_spear_id_table), }, .probe = sdhci_probe, .remove = __devexit_p(sdhci_remove), |