mmc: pwrseq: convert to proper platform device

[deliverable/linux.git] / drivers / mmc / core / pwrseq_simple.c

diff --git a/drivers/mmc/core/pwrseq_simple.c b/drivers/mmc/core/pwrseq_simple.c
index f94271bb1f6b0e7654d09ba77f5fcea5e092f1c1..450d907c6e6c618be461acd21dfd0509f08dd35e 100644 (file)
--- a/drivers/mmc/core/pwrseq_simple.c
+++ b/drivers/mmc/core/pwrseq_simple.c
@@ -8,7 +8,10 @@
  *  Simple MMC power sequence management
  */
 #include <linux/clk.h>
+#include <linux/init.h>
 #include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/device.h>
 #include <linux/err.h>
@@ -75,58 +78,64 @@ static void mmc_pwrseq_simple_power_off(struct mmc_host *host)
        }
 }
 
-static void mmc_pwrseq_simple_free(struct mmc_host *host)
-{
-       struct mmc_pwrseq_simple *pwrseq = to_pwrseq_simple(host->pwrseq);
-
-       if (!IS_ERR(pwrseq->reset_gpios))
-               gpiod_put_array(pwrseq->reset_gpios);
-
-       if (!IS_ERR(pwrseq->ext_clk))
-               clk_put(pwrseq->ext_clk);
-
-       kfree(pwrseq);
-}
-
 static const struct mmc_pwrseq_ops mmc_pwrseq_simple_ops = {
        .pre_power_on = mmc_pwrseq_simple_pre_power_on,
        .post_power_on = mmc_pwrseq_simple_post_power_on,
        .power_off = mmc_pwrseq_simple_power_off,
-       .free = mmc_pwrseq_simple_free,
 };
 
-struct mmc_pwrseq *mmc_pwrseq_simple_alloc(struct mmc_host *host,
-                                          struct device *dev)
+static const struct of_device_id mmc_pwrseq_simple_of_match[] = {
+       { .compatible = "mmc-pwrseq-simple",},
+       {/* sentinel */},
+};
+MODULE_DEVICE_TABLE(of, mmc_pwrseq_simple_of_match);
+
+static int mmc_pwrseq_simple_probe(struct platform_device *pdev)
 {
        struct mmc_pwrseq_simple *pwrseq;
-       int ret = 0;
+       struct device *dev = &pdev->dev;
 
-       pwrseq = kzalloc(sizeof(*pwrseq), GFP_KERNEL);
+       pwrseq = devm_kzalloc(dev, sizeof(*pwrseq), GFP_KERNEL);
        if (!pwrseq)
-               return ERR_PTR(-ENOMEM);
+               return -ENOMEM;
 
-       pwrseq->ext_clk = clk_get(dev, "ext_clock");
-       if (IS_ERR(pwrseq->ext_clk) &&
-           PTR_ERR(pwrseq->ext_clk) != -ENOENT) {
-               ret = PTR_ERR(pwrseq->ext_clk);
-               goto free;
-       }
+       pwrseq->ext_clk = devm_clk_get(dev, "ext_clock");
+       if (IS_ERR(pwrseq->ext_clk) && PTR_ERR(pwrseq->ext_clk) != -ENOENT)
+               return PTR_ERR(pwrseq->ext_clk);
 
-       pwrseq->reset_gpios = gpiod_get_array(dev, "reset", GPIOD_OUT_HIGH);
+       pwrseq->reset_gpios = devm_gpiod_get_array(dev, "reset",
+                                                       GPIOD_OUT_HIGH);
        if (IS_ERR(pwrseq->reset_gpios) &&
            PTR_ERR(pwrseq->reset_gpios) != -ENOENT &&
            PTR_ERR(pwrseq->reset_gpios) != -ENOSYS) {
-               ret = PTR_ERR(pwrseq->reset_gpios);
-               goto clk_put;
+               return PTR_ERR(pwrseq->reset_gpios);
        }
 
+       pwrseq->pwrseq.dev = dev;
        pwrseq->pwrseq.ops = &mmc_pwrseq_simple_ops;
+       pwrseq->pwrseq.owner = THIS_MODULE;
+       platform_set_drvdata(pdev, pwrseq);
 
-       return &pwrseq->pwrseq;
-clk_put:
-       if (!IS_ERR(pwrseq->ext_clk))
-               clk_put(pwrseq->ext_clk);
-free:
-       kfree(pwrseq);
-       return ERR_PTR(ret);
+       return mmc_pwrseq_register(&pwrseq->pwrseq);
 }
+
+static int mmc_pwrseq_simple_remove(struct platform_device *pdev)
+{
+       struct mmc_pwrseq_simple *pwrseq = platform_get_drvdata(pdev);
+
+       mmc_pwrseq_unregister(&pwrseq->pwrseq);
+
+       return 0;
+}
+
+static struct platform_driver mmc_pwrseq_simple_driver = {
+       .probe = mmc_pwrseq_simple_probe,
+       .remove = mmc_pwrseq_simple_remove,
+       .driver = {
+               .name = "pwrseq_simple",
+               .of_match_table = mmc_pwrseq_simple_of_match,
+       },
+};
+
+module_platform_driver(mmc_pwrseq_simple_driver);
+MODULE_LICENSE("GPL v2");