On Thu, Jul 07, 2011 at 12:47:50AM +0800, Shawn Guo wrote:
> The patch adds device tree probe support for sdhci-esdhc-imx driver.
>
> Signed-off-by: Shawn Guo <shawn....@linaro.org>
> Cc: Wolfram Sang <w.s...@pengutronix.de>
> Cc: Chris Ball <c...@laptop.org>
> Cc: Grant Likely <grant.lik...@secretlab.ca>
Acked-by: Grant Likely <grant.lik...@secretlab.ca>
> ---
> .../devicetree/bindings/mmc/fsl-imx-esdhc.txt | 34 +++++++++
> drivers/mmc/host/sdhci-esdhc-imx.c | 77
> +++++++++++++++++---
> 2 files changed, 102 insertions(+), 9 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
>
> diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
> b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
> new file mode 100644
> index 0000000..ab22fe6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
> @@ -0,0 +1,34 @@
> +* Freescale Enhanced Secure Digital Host Controller (eSDHC) for i.MX
> +
> +The Enhanced Secure Digital Host Controller on Freescale i.MX family
> +provides an interface for MMC, SD, and SDIO types of memory cards.
> +
> +Required properties:
> +- compatible : Should be "fsl,<chip>-esdhc"
> +- reg : Should contain eSDHC registers location and length
> +- interrupts : Should contain eSDHC interrupt
> +
> +Optional properties:
> +- fsl,card-wired : Indicate the card is wired to host permanently
> +- fsl,cd-internal : Indicate to use controller internal card detection
> +- fsl,wp-internal : Indicate to use controller internal write protection
> +- cd-gpios : Specify GPIOs for card detection
> +- wp-gpios : Specify GPIOs for write protection
> +
> +Examples:
> +
> +esdhc@70004000 {
> + compatible = "fsl,imx51-esdhc";
> + reg = <0x70004000 0x4000>;
> + interrupts = <1>;
> + fsl,cd-internal;
> + fsl,wp-internal;
> +};
> +
> +esdhc@70008000 {
> + compatible = "fsl,imx51-esdhc";
> + reg = <0x70008000 0x4000>;
> + interrupts = <2>;
> + cd-gpios = <&gpio0 6 0>; /* GPIO1_6 */
> + wp-gpios = <&gpio0 5 0>; /* GPIO1_5 */
> +};
> diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c
> b/drivers/mmc/host/sdhci-esdhc-imx.c
> index f3efb3b..cbdd91f 100644
> --- a/drivers/mmc/host/sdhci-esdhc-imx.c
> +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
> @@ -20,6 +20,9 @@
> #include <linux/mmc/host.h>
> #include <linux/mmc/mmc.h>
> #include <linux/mmc/sdio.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/of_gpio.h>
> #include <mach/esdhc.h>
> #include "sdhci-pltfm.h"
> #include "sdhci-esdhc.h"
> @@ -73,6 +76,14 @@ static struct platform_device_id imx_esdhc_devtype[] = {
> }
> };
>
> +static const struct of_device_id imx_esdhc_dt_ids[] = {
> + { .compatible = "fsl,imx25-esdhc", .data =
> &imx_esdhc_devtype[IMX25_ESDHC], },
> + { .compatible = "fsl,imx35-esdhc", .data =
> &imx_esdhc_devtype[IMX35_ESDHC], },
> + { .compatible = "fsl,imx51-esdhc", .data =
> &imx_esdhc_devtype[IMX51_ESDHC], },
> + { .compatible = "fsl,imx53-esdhc", .data =
> &imx_esdhc_devtype[IMX53_ESDHC], },
> + { /* sentinel */ }
> +};
> +
> static inline int is_imx25_esdhc(struct pltfm_imx_data *data)
> {
> return data->devtype == IMX25_ESDHC;
> @@ -307,8 +318,48 @@ static irqreturn_t cd_irq(int irq, void *data)
> return IRQ_HANDLED;
> };
>
> +#ifdef CONFIG_OF
> +static int __devinit
> +sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
> + struct esdhc_platform_data *boarddata)
> +{
> + struct device_node *np = pdev->dev.of_node;
> +
> + if (!np)
> + return -ENODEV;
> +
> + if (of_get_property(np, "fsl,card-wired", NULL))
> + boarddata->cd_type = ESDHC_CD_PERMANENT;
> +
> + if (of_get_property(np, "fsl,cd-controller", NULL))
> + boarddata->cd_type = ESDHC_CD_CONTROLLER;
> +
> + if (of_get_property(np, "fsl,wp-controller", NULL))
> + boarddata->wp_type = ESDHC_WP_CONTROLLER;
> +
> + boarddata->cd_gpio = of_get_named_gpio(np, "cd-gpios", 0);
> + if (gpio_is_valid(boarddata->cd_gpio))
> + boarddata->cd_type = ESDHC_CD_GPIO;
> +
> + boarddata->wp_gpio = of_get_named_gpio(np, "wp-gpios", 0);
> + if (gpio_is_valid(boarddata->wp_gpio))
> + boarddata->wp_type = ESDHC_WP_GPIO;
> +
> + return 0;
> +}
> +#else
> +static inline int
> +sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
> + struct esdhc_platform_data *boarddata)
> +{
> + return -ENODEV;
> +}
> +#endif
> +
> static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
> {
> + const struct of_device_id *of_id =
> + of_match_device(imx_esdhc_dt_ids, &pdev->dev);
> struct sdhci_pltfm_host *pltfm_host;
> struct sdhci_host *host;
> struct esdhc_platform_data *boarddata;
> @@ -323,9 +374,13 @@ static int __devinit sdhci_esdhc_imx_probe(struct
> platform_device *pdev)
> pltfm_host = sdhci_priv(host);
>
> imx_data = kzalloc(sizeof(struct pltfm_imx_data), GFP_KERNEL);
> - if (!imx_data)
> - return -ENOMEM;
> + if (!imx_data) {
> + err = -ENOMEM;
> + goto err_imx_data;
> + }
>
> + if (of_id)
> + pdev->id_entry = of_id->data;
> imx_data->devtype = pdev->id_entry->driver_data;
> pltfm_host->priv = imx_data;
>
> @@ -344,14 +399,16 @@ static int __devinit sdhci_esdhc_imx_probe(struct
> platform_device *pdev)
> if (is_imx53_esdhc(imx_data))
> imx_data->flags |= ESDHC_FLAG_MULTIBLK_NO_INT;
>
> - if (!host->mmc->parent->platform_data) {
> - dev_err(mmc_dev(host->mmc), "no board data!\n");
> - err = -EINVAL;
> - goto no_board_data;
> - }
> - imx_data->boarddata = *((struct esdhc_platform_data *)
> - host->mmc->parent->platform_data);
> boarddata = &imx_data->boarddata;
> + if (sdhci_esdhc_imx_probe_dt(pdev, boarddata) < 0) {
> + if (!host->mmc->parent->platform_data) {
> + dev_err(mmc_dev(host->mmc), "no board data!\n");
> + err = -EINVAL;
> + goto no_board_data;
> + }
> + imx_data->boarddata = *((struct esdhc_platform_data *)
> + host->mmc->parent->platform_data);
> + }
>
> /* write_protect */
> if (boarddata->wp_type == ESDHC_WP_GPIO) {
> @@ -420,6 +477,7 @@ no_board_data:
> clk_put(pltfm_host->clk);
> err_clk_get:
> kfree(imx_data);
> +err_imx_data:
> sdhci_pltfm_free(pdev);
> return err;
> }
> @@ -455,6 +513,7 @@ static struct platform_driver sdhci_esdhc_imx_driver = {
> .driver = {
> .name = "sdhci-esdhc-imx",
> .owner = THIS_MODULE,
> + .of_match_table = imx_esdhc_dt_ids,
> },
> .id_table = imx_esdhc_devtype,
> .probe = sdhci_esdhc_imx_probe,
> --
> 1.7.4.1
>
>
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