mmc: sdhci-iproc: Add ACPI support

Add ACPI support to all IPROC SDHCI variants.

Signed-off-by: Srinath Mannam <srinath.mannam@broadcom.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Scott Branden <scott.branden@broadcom.com>
Reviewed-by: Vladimir Olovyannikov <vladimir.olovyannikov@broadcom.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 694d082..5c17b75 100644 (file)
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -345,6 +345,7 @@ config MMC_SDHCI_IPROC
        tristate "SDHCI support for the BCM2835 & iProc SD/MMC Controller"
        depends on ARCH_BCM2835 || ARCH_BCM_IPROC || COMPILE_TEST
        depends on MMC_SDHCI_PLTFM
+       depends on OF || ACPI
        default ARCH_BCM_IPROC
        select MMC_SDHCI_IO_ACCESSORS
        help

diff --git a/drivers/mmc/host/sdhci-iproc.c b/drivers/mmc/host/sdhci-iproc.c
index d0e83db..0db9905 100644 (file)
--- a/drivers/mmc/host/sdhci-iproc.c
+++ b/drivers/mmc/host/sdhci-iproc.c
@@ -15,6 +15,7 @@
  * iProc SDHCI platform driver
  */
 
+#include <linux/acpi.h>
 #include <linux/delay.h>
 #include <linux/module.h>
 #include <linux/mmc/host.h>
@@ -162,9 +163,19 @@ static void sdhci_iproc_writeb(struct sdhci_host *host, u8 val, int reg)
        sdhci_iproc_writel(host, newval, reg & ~3);
 }
 
+static unsigned int sdhci_iproc_get_max_clock(struct sdhci_host *host)
+{
+       struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+
+       if (pltfm_host->clk)
+               return sdhci_pltfm_clk_get_max_clock(host);
+       else
+               return pltfm_host->clock;
+}
+
 static const struct sdhci_ops sdhci_iproc_ops = {
        .set_clock = sdhci_set_clock,
-       .get_max_clock = sdhci_pltfm_clk_get_max_clock,
+       .get_max_clock = sdhci_iproc_get_max_clock,
        .set_bus_width = sdhci_set_bus_width,
        .reset = sdhci_reset,
        .set_uhs_signaling = sdhci_set_uhs_signaling,
@@ -178,7 +189,7 @@ static const struct sdhci_ops sdhci_iproc_32only_ops = {
        .write_w = sdhci_iproc_writew,
        .write_b = sdhci_iproc_writeb,
        .set_clock = sdhci_set_clock,
-       .get_max_clock = sdhci_pltfm_clk_get_max_clock,
+       .get_max_clock = sdhci_iproc_get_max_clock,
        .set_bus_width = sdhci_set_bus_width,
        .reset = sdhci_reset,
        .set_uhs_signaling = sdhci_set_uhs_signaling,
@@ -256,19 +267,25 @@ static const struct of_device_id sdhci_iproc_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, sdhci_iproc_of_match);
 
+static const struct acpi_device_id sdhci_iproc_acpi_ids[] = {
+       { .id = "BRCM5871", .driver_data = (kernel_ulong_t)&iproc_cygnus_data },
+       { .id = "BRCM5872", .driver_data = (kernel_ulong_t)&iproc_data },
+       { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(acpi, sdhci_iproc_acpi_ids);
+
 static int sdhci_iproc_probe(struct platform_device *pdev)
 {
-       const struct of_device_id *match;
-       const struct sdhci_iproc_data *iproc_data;
+       struct device *dev = &pdev->dev;
+       const struct sdhci_iproc_data *iproc_data = NULL;
        struct sdhci_host *host;
        struct sdhci_iproc_host *iproc_host;
        struct sdhci_pltfm_host *pltfm_host;
        int ret;
 
-       match = of_match_device(sdhci_iproc_of_match, &pdev->dev);
-       if (!match)
-               return -EINVAL;
-       iproc_data = match->data;
+       iproc_data = device_get_match_data(dev);
+       if (!iproc_data)
+               return -ENODEV;
 
        host = sdhci_pltfm_init(pdev, iproc_data->pdata, sizeof(*iproc_host));
        if (IS_ERR(host))
@@ -280,19 +297,21 @@ static int sdhci_iproc_probe(struct platform_device *pdev)
        iproc_host->data = iproc_data;
 
        mmc_of_parse(host->mmc);
-       sdhci_get_of_property(pdev);
+       sdhci_get_property(pdev);
 
        host->mmc->caps |= iproc_host->data->mmc_caps;
 
-       pltfm_host->clk = devm_clk_get(&pdev->dev, NULL);
-       if (IS_ERR(pltfm_host->clk)) {
-               ret = PTR_ERR(pltfm_host->clk);
-               goto err;
-       }
-       ret = clk_prepare_enable(pltfm_host->clk);
-       if (ret) {
-               dev_err(&pdev->dev, "failed to enable host clk\n");
-               goto err;
+       if (dev->of_node) {
+               pltfm_host->clk = devm_clk_get(dev, NULL);
+               if (IS_ERR(pltfm_host->clk)) {
+                       ret = PTR_ERR(pltfm_host->clk);
+                       goto err;
+               }
+               ret = clk_prepare_enable(pltfm_host->clk);
+               if (ret) {
+                       dev_err(dev, "failed to enable host clk\n");
+                       goto err;
+               }
        }
 
        if (iproc_host->data->pdata->quirks & SDHCI_QUIRK_MISSING_CAPS) {
@@ -307,7 +326,8 @@ static int sdhci_iproc_probe(struct platform_device *pdev)
        return 0;
 
 err_clk:
-       clk_disable_unprepare(pltfm_host->clk);
+       if (dev->of_node)
+               clk_disable_unprepare(pltfm_host->clk);
 err:
        sdhci_pltfm_free(pdev);
        return ret;
@@ -317,6 +337,7 @@ static struct platform_driver sdhci_iproc_driver = {
        .driver = {
                .name = "sdhci-iproc",
                .of_match_table = sdhci_iproc_of_match,
+               .acpi_match_table = ACPI_PTR(sdhci_iproc_acpi_ids),
                .pm = &sdhci_pltfm_pmops,
        },
        .probe = sdhci_iproc_probe,