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authorStephen Boyd <sboyd@codeaurora.org>2014-07-15 14:59:21 -0700
committerStephen Boyd <sboyd@codeaurora.org>2014-07-15 16:39:00 -0700
commit5b6b7490af110c2b0df807eddd00ae6290bcf50a (patch)
treeafb22aadce5a8a8db90350613d79655844585256 /drivers/clk
parentff20783f7b9f35b29e768d8ecc7076c1ca1a60ca (diff)
clk: qcom: Fix PLL rate configurations
Sometimes we need to program PLLs with a fixed rate configuration during driver probe. Doing this after we register the PLLs with the clock framework causes the common clock framework to assume the rate of the PLLs are 0. This causes all sorts of problems for rate recalculations because the common clock framework caches the rate once at registration time unless a flag is set to always recalculate the rates. Split the qcom_cc_probe() function into two pieces, map and everything else, so that drivers which need to configure some PLL rates or otherwise twiddle bits in the clock controller can do so before registering clocks. This allows us to properly detect the rates of PLLs that are programmed at boot. Fixes: 49fc825f0cc2 "clk: qcom: Consolidate common probe code" Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers/clk')
-rw-r--r--drivers/clk/qcom/common.c39
-rw-r--r--drivers/clk/qcom/common.h6
-rw-r--r--drivers/clk/qcom/mmcc-msm8974.c10
3 files changed, 38 insertions, 17 deletions
diff --git a/drivers/clk/qcom/common.c b/drivers/clk/qcom/common.c
index 9b5a1cfc6b91..eeb3eea01f4c 100644
--- a/drivers/clk/qcom/common.c
+++ b/drivers/clk/qcom/common.c
@@ -27,30 +27,35 @@ struct qcom_cc {
struct clk *clks[];
};
-int qcom_cc_probe(struct platform_device *pdev, const struct qcom_cc_desc *desc)
+struct regmap *
+qcom_cc_map(struct platform_device *pdev, const struct qcom_cc_desc *desc)
{
void __iomem *base;
struct resource *res;
+ struct device *dev = &pdev->dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(base))
+ return ERR_CAST(base);
+
+ return devm_regmap_init_mmio(dev, base, desc->config);
+}
+EXPORT_SYMBOL_GPL(qcom_cc_map);
+
+int qcom_cc_really_probe(struct platform_device *pdev,
+ const struct qcom_cc_desc *desc, struct regmap *regmap)
+{
int i, ret;
struct device *dev = &pdev->dev;
struct clk *clk;
struct clk_onecell_data *data;
struct clk **clks;
- struct regmap *regmap;
struct qcom_reset_controller *reset;
struct qcom_cc *cc;
size_t num_clks = desc->num_clks;
struct clk_regmap **rclks = desc->clks;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- base = devm_ioremap_resource(dev, res);
- if (IS_ERR(base))
- return PTR_ERR(base);
-
- regmap = devm_regmap_init_mmio(dev, base, desc->config);
- if (IS_ERR(regmap))
- return PTR_ERR(regmap);
-
cc = devm_kzalloc(dev, sizeof(*cc) + sizeof(*clks) * num_clks,
GFP_KERNEL);
if (!cc)
@@ -91,6 +96,18 @@ int qcom_cc_probe(struct platform_device *pdev, const struct qcom_cc_desc *desc)
return ret;
}
+EXPORT_SYMBOL_GPL(qcom_cc_really_probe);
+
+int qcom_cc_probe(struct platform_device *pdev, const struct qcom_cc_desc *desc)
+{
+ struct regmap *regmap;
+
+ regmap = qcom_cc_map(pdev, desc);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ return qcom_cc_really_probe(pdev, desc, regmap);
+}
EXPORT_SYMBOL_GPL(qcom_cc_probe);
void qcom_cc_remove(struct platform_device *pdev)
diff --git a/drivers/clk/qcom/common.h b/drivers/clk/qcom/common.h
index 2c3cfc860348..2765e9d3da97 100644
--- a/drivers/clk/qcom/common.h
+++ b/drivers/clk/qcom/common.h
@@ -17,6 +17,7 @@ struct platform_device;
struct regmap_config;
struct clk_regmap;
struct qcom_reset_map;
+struct regmap;
struct qcom_cc_desc {
const struct regmap_config *config;
@@ -26,6 +27,11 @@ struct qcom_cc_desc {
size_t num_resets;
};
+extern struct regmap *qcom_cc_map(struct platform_device *pdev,
+ const struct qcom_cc_desc *desc);
+extern int qcom_cc_really_probe(struct platform_device *pdev,
+ const struct qcom_cc_desc *desc,
+ struct regmap *regmap);
extern int qcom_cc_probe(struct platform_device *pdev,
const struct qcom_cc_desc *desc);
diff --git a/drivers/clk/qcom/mmcc-msm8974.c b/drivers/clk/qcom/mmcc-msm8974.c
index c65b90515872..bc8f519c47aa 100644
--- a/drivers/clk/qcom/mmcc-msm8974.c
+++ b/drivers/clk/qcom/mmcc-msm8974.c
@@ -2547,18 +2547,16 @@ MODULE_DEVICE_TABLE(of, mmcc_msm8974_match_table);
static int mmcc_msm8974_probe(struct platform_device *pdev)
{
- int ret;
struct regmap *regmap;
- ret = qcom_cc_probe(pdev, &mmcc_msm8974_desc);
- if (ret)
- return ret;
+ regmap = qcom_cc_map(pdev, &mmcc_msm8974_desc);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
- regmap = dev_get_regmap(&pdev->dev, NULL);
clk_pll_configure_sr_hpm_lp(&mmpll1, regmap, &mmpll1_config, true);
clk_pll_configure_sr_hpm_lp(&mmpll3, regmap, &mmpll3_config, false);
- return 0;
+ return qcom_cc_really_probe(pdev, &mmcc_msm8974_desc, regmap);
}
static int mmcc_msm8974_remove(struct platform_device *pdev)