[PATCH v5 6/7] clk: sprd: support to get regmap from parent node

Chunyan Zhang
2020-02-19T04:10:34Z

Some SC9863a clock nodes would be the child of a syscon node, clocks can
use the regmap of syscon device directly for this kind of cases.

Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
---
drivers/clk/sprd/common.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/sprd/common.c b/drivers/clk/sprd/common.c
index c0af4779892b..d620bbbcdfc8 100644
--- a/drivers/clk/sprd/common.c
+++ b/drivers/clk/sprd/common.c
@@ -40,7 +40,8 @@ int sprd_clk_regmap_init(struct platform_device *pdev,
const struct sprd_clk_desc *desc)
{
void __iomem *base;
- struct device_node *node = pdev->dev.of_node;
+ struct device *dev = &pdev->dev;
+ struct device_node *node = dev->of_node;
struct regmap *regmap;

if (of_find_property(node, "sprd,syscon", NULL)) {
@@ -49,6 +50,13 @@ int sprd_clk_regmap_init(struct platform_device *pdev,
pr_err("%s: failed to get syscon regmap\n", __func__);
return PTR_ERR(regmap);
}
+ } else if (of_device_is_compatible(of_get_parent(dev->of_node),
+ "syscon")) {
+ regmap = device_node_to_regmap(of_get_parent(dev->of_node));
+ if (IS_ERR(regmap)) {
+ dev_err(dev, "failed to get regmap from its parent.\n");
+ return PTR_ERR(regmap);
+ }
} else {
base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(base))
--
2.20.1