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path: root/drivers/mfd/syscon.c
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Diffstat (limited to 'drivers/mfd/syscon.c')
-rw-r--r--drivers/mfd/syscon.c19
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
index b7aabeefab07..2f2225e845ef 100644
--- a/drivers/mfd/syscon.c
+++ b/drivers/mfd/syscon.c
@@ -36,7 +36,7 @@ struct syscon {
struct list_head list;
};
-static struct regmap_config syscon_regmap_config = {
+static const struct regmap_config syscon_regmap_config = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
@@ -50,6 +50,7 @@ static struct syscon *of_syscon_register(struct device_node *np)
u32 reg_io_width;
int ret;
struct regmap_config syscon_config = syscon_regmap_config;
+ struct resource res;
if (!of_device_is_compatible(np, "syscon"))
return ERR_PTR(-EINVAL);
@@ -58,7 +59,12 @@ static struct syscon *of_syscon_register(struct device_node *np)
if (!syscon)
return ERR_PTR(-ENOMEM);
- base = of_iomap(np, 0);
+ if (of_address_to_resource(np, 0, &res)) {
+ ret = -ENOMEM;
+ goto err_map;
+ }
+
+ base = ioremap(res.start, resource_size(&res));
if (!base) {
ret = -ENOMEM;
goto err_map;
@@ -81,6 +87,7 @@ static struct syscon *of_syscon_register(struct device_node *np)
syscon_config.reg_stride = reg_io_width;
syscon_config.val_bits = reg_io_width * 8;
+ syscon_config.max_register = resource_size(&res) - reg_io_width;
regmap = regmap_init_mmio(NULL, base, &syscon_config);
if (IS_ERR(regmap)) {
@@ -192,6 +199,7 @@ static int syscon_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct syscon_platform_data *pdata = dev_get_platdata(dev);
struct syscon *syscon;
+ struct regmap_config syscon_config = syscon_regmap_config;
struct resource *res;
void __iomem *base;
@@ -207,11 +215,10 @@ static int syscon_probe(struct platform_device *pdev)
if (!base)
return -ENOMEM;
- syscon_regmap_config.max_register = res->end - res->start - 3;
+ syscon_config.max_register = res->end - res->start - 3;
if (pdata)
- syscon_regmap_config.name = pdata->label;
- syscon->regmap = devm_regmap_init_mmio(dev, base,
- &syscon_regmap_config);
+ syscon_config.name = pdata->label;
+ syscon->regmap = devm_regmap_init_mmio(dev, base, &syscon_config);
if (IS_ERR(syscon->regmap)) {
dev_err(dev, "regmap init failed\n");
return PTR_ERR(syscon->regmap);