misc: sram: use devm_platform_ioremap_resource_wc()

Use the new devm_platform_ioremap_resource_wc() helper instead of
devm_ioremap_wc() combinded with a call to platform_get_resource().
Also use devm_platform_ioremap_resource() where applicable.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20191022084318.22256-6-brgl@bgdev.pl
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/misc/sram.c b/drivers/misc/sram.c
index f30448b..6c1a23c 100644 (file)
--- a/drivers/misc/sram.c
+++ b/drivers/misc/sram.c
@@ -340,8 +340,6 @@ static const struct of_device_id sram_dt_ids[] = {
 static int sram_probe(struct platform_device *pdev)
 {
        struct sram_dev *sram;
-       struct resource *res;
-       size_t size;
        int ret;
        int (*init_func)(void);
 
@@ -351,25 +349,14 @@ static int sram_probe(struct platform_device *pdev)
 
        sram->dev = &pdev->dev;
 
-       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       if (!res) {
-               dev_err(sram->dev, "found no memory resource\n");
-               return -EINVAL;
-       }
-
-       size = resource_size(res);
-
-       if (!devm_request_mem_region(sram->dev, res->start, size, pdev->name)) {
-               dev_err(sram->dev, "could not request region for resource\n");
-               return -EBUSY;
-       }
-
        if (of_property_read_bool(pdev->dev.of_node, "no-memory-wc"))
-               sram->virt_base = devm_ioremap(sram->dev, res->start, size);
+               sram->virt_base = devm_platform_ioremap_resource(pdev, 0);
        else
-               sram->virt_base = devm_ioremap_wc(sram->dev, res->start, size);
-       if (!sram->virt_base)
-               return -ENOMEM;
+               sram->virt_base = devm_platform_ioremap_resource_wc(pdev, 0);
+       if (IS_ERR(sram->virt_base)) {
+               dev_err(&pdev->dev, "could not map SRAM registers\n");
+               return PTR_ERR(sram->virt_base);
+       }
 
        sram->pool = devm_gen_pool_create(sram->dev, ilog2(SRAM_GRANULARITY),
                                          NUMA_NO_NODE, NULL);
@@ -382,7 +369,8 @@ static int sram_probe(struct platform_device *pdev)
        else
                clk_prepare_enable(sram->clk);
 
-       ret = sram_reserve_regions(sram, res);
+       ret = sram_reserve_regions(sram,
+                       platform_get_resource(pdev, IORESOURCE_MEM, 0));
        if (ret)
                goto err_disable_clk;