From b74e5b61382621c37522d7bef86ddcddde11a08b Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Tue, 23 Aug 2011 12:15:33 -0600 Subject: [PATCH] --- yaml --- r: 270241 b: refs/heads/master c: 275173b225ae663e54d8dc5c93d79265aad19f89 h: refs/heads/master i: 270239: 50c8e6e5c80d96cef3f4b4862824710ef4169a9c v: v3 --- [refs] | 2 +- .../devicetree/bindings/mmc/nvidia-sdhci.txt | 25 +++++++++ trunk/drivers/mmc/host/sdhci-tegra.c | 51 +++++++++++++++---- 3 files changed, 66 insertions(+), 12 deletions(-) create mode 100644 trunk/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt diff --git a/[refs] b/[refs] index b02e0871f17e..be7afd9e2a0b 100644 --- a/[refs] +++ b/[refs] @@ -1,2 +1,2 @@ --- -refs/heads/master: 08da834a24312157f512224691ad1fddd11c1073 +refs/heads/master: 275173b225ae663e54d8dc5c93d79265aad19f89 diff --git a/trunk/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt b/trunk/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt new file mode 100644 index 000000000000..c87f66782726 --- /dev/null +++ b/trunk/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt @@ -0,0 +1,25 @@ +* NVIDIA Tegra Secure Digital Host Controller + +This controller on Tegra family SoCs provides an interface for MMC, SD, +and SDIO types of memory cards. + +Required properties: +- compatible : Should be "nvidia,-sdhci" +- reg : Should contain eSDHC registers location and length +- interrupts : Should contain eSDHC interrupt + +Optional properties: +- cd-gpios : Specify GPIOs for card detection +- wp-gpios : Specify GPIOs for write protection +- power-gpios : Specify GPIOs for power control + +Example: + +sdhci@c8000200 { + compatible = "nvidia,tegra20-sdhci"; + reg = <0xc8000200 0x200>; + interrupts = <47>; + cd-gpios = <&gpio 69 0>; /* gpio PI5 */ + wp-gpios = <&gpio 57 0>; /* gpio PH1 */ + power-gpios = <&gpio 155 0>; /* gpio PT3 */ +}; diff --git a/trunk/drivers/mmc/host/sdhci-tegra.c b/trunk/drivers/mmc/host/sdhci-tegra.c index 18b0bd31de78..8a114b6211c7 100644 --- a/trunk/drivers/mmc/host/sdhci-tegra.c +++ b/trunk/drivers/mmc/host/sdhci-tegra.c @@ -17,6 +17,7 @@ #include #include #include +#include #include #include #include @@ -73,10 +74,8 @@ static void tegra_sdhci_writel(struct sdhci_host *host, u32 val, int reg) static unsigned int tegra_sdhci_get_ro(struct sdhci_host *sdhci) { - struct platform_device *pdev = to_platform_device(mmc_dev(sdhci->mmc)); - struct tegra_sdhci_platform_data *plat; - - plat = pdev->dev.platform_data; + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(sdhci); + struct tegra_sdhci_platform_data *plat = pltfm_host->priv; if (!gpio_is_valid(plat->wp_gpio)) return -1; @@ -94,12 +93,10 @@ static irqreturn_t carddetect_irq(int irq, void *data) static int tegra_sdhci_8bit(struct sdhci_host *host, int bus_width) { - struct platform_device *pdev = to_platform_device(mmc_dev(host->mmc)); - struct tegra_sdhci_platform_data *plat; + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct tegra_sdhci_platform_data *plat = pltfm_host->priv; u32 ctrl; - plat = pdev->dev.platform_data; - ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); if (plat->is_8bit && bus_width == MMC_BUS_WIDTH_8) { ctrl &= ~SDHCI_CTRL_4BITBUS; @@ -131,6 +128,34 @@ static struct sdhci_pltfm_data sdhci_tegra_pdata = { .ops = &tegra_sdhci_ops, }; +static const struct of_device_id sdhci_tegra_dt_match[] __devinitdata = { + { .compatible = "nvidia,tegra20-sdhci", }, + {} +}; +MODULE_DEVICE_TABLE(of, sdhci_dt_ids); + +static struct tegra_sdhci_platform_data * __devinit sdhci_tegra_dt_parse_pdata( + struct platform_device *pdev) +{ + struct tegra_sdhci_platform_data *plat; + struct device_node *np = pdev->dev.of_node; + + if (!np) + return NULL; + + plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL); + if (!plat) { + dev_err(&pdev->dev, "Can't allocate platform data\n"); + return NULL; + } + + 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); + + return plat; +} + static int __devinit sdhci_tegra_probe(struct platform_device *pdev) { struct sdhci_pltfm_host *pltfm_host; @@ -147,12 +172,17 @@ static int __devinit sdhci_tegra_probe(struct platform_device *pdev) plat = pdev->dev.platform_data; + if (plat == NULL) + plat = sdhci_tegra_dt_parse_pdata(pdev); + if (plat == NULL) { dev_err(mmc_dev(host->mmc), "missing platform data\n"); rc = -ENXIO; goto err_no_plat; } + pltfm_host->priv = plat; + if (gpio_is_valid(plat->power_gpio)) { rc = gpio_request(plat->power_gpio, "sdhci_power"); if (rc) { @@ -247,13 +277,11 @@ static int __devexit sdhci_tegra_remove(struct platform_device *pdev) { struct sdhci_host *host = platform_get_drvdata(pdev); struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); - struct tegra_sdhci_platform_data *plat; + struct tegra_sdhci_platform_data *plat = pltfm_host->priv; int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff); sdhci_remove_host(host, dead); - plat = pdev->dev.platform_data; - if (gpio_is_valid(plat->wp_gpio)) { tegra_gpio_disable(plat->wp_gpio); gpio_free(plat->wp_gpio); @@ -282,6 +310,7 @@ static struct platform_driver sdhci_tegra_driver = { .driver = { .name = "sdhci-tegra", .owner = THIS_MODULE, + .of_match_table = sdhci_tegra_dt_match, }, .probe = sdhci_tegra_probe, .remove = __devexit_p(sdhci_tegra_remove),