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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, 19 insertions, 0 deletions
diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
index 0ecdffb3d967..f6922a0f8058 100644
--- a/drivers/mfd/syscon.c
+++ b/drivers/mfd/syscon.c
@@ -12,6 +12,7 @@
* (at your option) any later version.
*/
+#include <linux/clk.h>
#include <linux/err.h>
#include <linux/hwspinlock.h>
#include <linux/io.h>
@@ -45,6 +46,7 @@ static const struct regmap_config syscon_regmap_config = {
static struct syscon *of_syscon_register(struct device_node *np)
{
+ struct clk *clk;
struct syscon *syscon;
struct regmap *regmap;
void __iomem *base;
@@ -119,6 +121,18 @@ static struct syscon *of_syscon_register(struct device_node *np)
goto err_regmap;
}
+ clk = of_clk_get(np, 0);
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ /* clock is optional */
+ if (ret != -ENOENT)
+ goto err_clk;
+ } else {
+ ret = regmap_mmio_attach_clk(regmap, clk);
+ if (ret)
+ goto err_attach;
+ }
+
syscon->regmap = regmap;
syscon->np = np;
@@ -128,6 +142,11 @@ static struct syscon *of_syscon_register(struct device_node *np)
return syscon;
+err_attach:
+ if (!IS_ERR(clk))
+ clk_put(clk);
+err_clk:
+ regmap_exit(regmap);
err_regmap:
iounmap(base);
err_map: