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clk: sprd: support to get regmap from parent node 

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>
Link: https://lkml.kernel.org/r/20200304072730.9193-7-zhang.lyra@gmail.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Chunyan Zhang 2020-03-04 15:27:29 +08:00 committed by Stephen Boyd
parent ea8ca3109d
commit f95e8c7923
1 changed files with 9 additions and 1 deletions
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10
drivers/clk/sprd/common.c
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@ -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))