[PATCH v5 2/2] clk: qcom: lpass-sc7180: Disentangle the two clock devices

Douglas Anderson
2020-10-19T22:49:57Z

The sc7180 lpass clock driver manages two different devices. These
two devices were tangled together, using one probe and a lookup to
figure out the real probe. I think it's cleaner to really separate
the probe for these two devices since they're really different things,
just both managed by the same driver.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
---

Note: this is now a 2-patch cleanup series with no actual bugfixes
since the problem solved by patch #3 was better solved with:

https://lore.kernel.org/r/20201017020137.1251319-1-sboyd@kernel.org

Changes in v5:
- Two blank lines inserted before "return" statements.

Changes in v3:
- ("clk: qcom: lpass-sc7180: Disentangle the two clock devices") new for v3.

drivers/clk/qcom/lpasscorecc-sc7180.c | 103 ++++++++++++++++----------
1 file changed, 64 insertions(+), 39 deletions(-)

diff --git a/drivers/clk/qcom/lpasscorecc-sc7180.c b/drivers/clk/qcom/lpasscorecc-sc7180.c
index 2d15e33ec837..1a3925badd7c 100644
--- a/drivers/clk/qcom/lpasscorecc-sc7180.c
+++ b/drivers/clk/qcom/lpasscorecc-sc7180.c
@@ -366,12 +366,39 @@ static void lpass_pm_clk_destroy(void *data)
pm_clk_destroy(data);
}

+static int lpass_create_pm_clks(struct platform_device *pdev)
+{
+ int ret;
+
+ pm_runtime_enable(&pdev->dev);
+ ret = devm_add_action_or_reset(&pdev->dev, lpass_pm_runtime_disable, &pdev->dev);
+ if (ret)
+ return ret;
+
+ ret = pm_clk_create(&pdev->dev);
+ if (ret)
+ return ret;
+ ret = devm_add_action_or_reset(&pdev->dev, lpass_pm_clk_destroy, &pdev->dev);
+ if (ret)
+ return ret;
+
+ ret = pm_clk_add(&pdev->dev, "iface");
+ if (ret < 0)
+ dev_err(&pdev->dev, "failed to acquire iface clock\n");
+
+ return ret;
+}
+
static int lpass_core_cc_sc7180_probe(struct platform_device *pdev)
{
const struct qcom_cc_desc *desc;
struct regmap *regmap;
int ret;

+ ret = lpass_create_pm_clks(pdev);
+ if (ret)
+ return ret;
+
lpass_core_cc_sc7180_regmap_config.name = "lpass_audio_cc";
desc = &lpass_audio_hm_sc7180_desc;
ret = qcom_cc_probe_by_index(pdev, 1, desc);
@@ -402,6 +429,11 @@ static int lpass_core_cc_sc7180_probe(struct platform_device *pdev)
static int lpass_hm_core_probe(struct platform_device *pdev)
{
const struct qcom_cc_desc *desc;
+ int ret;
+
+ ret = lpass_create_pm_clks(pdev);
+ if (ret)
+ return ret;

lpass_core_cc_sc7180_regmap_config.name = "lpass_hm_core";
desc = &lpass_core_hm_sc7180_desc;
@@ -409,55 +441,28 @@ static int lpass_hm_core_probe(struct platform_device *pdev)
return qcom_cc_probe_by_index(pdev, 0, desc);
}

-static const struct of_device_id lpass_core_cc_sc7180_match_table[] = {
+static const struct of_device_id lpass_hm_sc7180_match_table[] = {
{
.compatible = "qcom,sc7180-lpasshm",
- .data = lpass_hm_core_probe,
},
+ { }
+};
+MODULE_DEVICE_TABLE(of, lpass_hm_sc7180_match_table);
+
+static const struct of_device_id lpass_core_cc_sc7180_match_table[] = {
{
.compatible = "qcom,sc7180-lpasscorecc",
- .data = lpass_core_cc_sc7180_probe,
},
{ }
};
MODULE_DEVICE_TABLE(of, lpass_core_cc_sc7180_match_table);

-static int lpass_core_sc7180_probe(struct platform_device *pdev)
-{
- int (*clk_probe)(struct platform_device *p);
- int ret;
-
- pm_runtime_enable(&pdev->dev);
- ret = devm_add_action_or_reset(&pdev->dev, lpass_pm_runtime_disable, &pdev->dev);
- if (ret)
- return ret;
-
- ret = pm_clk_create(&pdev->dev);
- if (ret)
- return ret;
- ret = devm_add_action_or_reset(&pdev->dev, lpass_pm_clk_destroy, &pdev->dev);
- if (ret)
- return ret;
-
- ret = pm_clk_add(&pdev->dev, "iface");
- if (ret < 0) {
- dev_err(&pdev->dev, "failed to acquire iface clock\n");
- return ret;
- }
-
- clk_probe = of_device_get_match_data(&pdev->dev);
- if (!clk_probe)
- return -EINVAL;
-
- return clk_probe(pdev);
-}
-
static const struct dev_pm_ops lpass_core_cc_pm_ops = {
SET_RUNTIME_PM_OPS(pm_clk_suspend, pm_clk_resume, NULL)
};

static struct platform_driver lpass_core_cc_sc7180_driver = {
- .probe = lpass_core_sc7180_probe,
+ .probe = lpass_core_cc_sc7180_probe,
.driver = {
.name = "lpass_core_cc-sc7180",
.of_match_table = lpass_core_cc_sc7180_match_table,
@@ -465,17 +470,37 @@ static struct platform_driver lpass_core_cc_sc7180_driver = {
},
};

-static int __init lpass_core_cc_sc7180_init(void)
+static const struct dev_pm_ops lpass_hm_pm_ops = {
+ SET_RUNTIME_PM_OPS(pm_clk_suspend, pm_clk_resume, NULL)
+};
+
+static struct platform_driver lpass_hm_sc7180_driver = {
+ .probe = lpass_hm_core_probe,
+ .driver = {
+ .name = "lpass_hm-sc7180",
+ .of_match_table = lpass_hm_sc7180_match_table,
+ .pm = &lpass_hm_pm_ops,
+ },
+};
+
+static int __init lpass_sc7180_init(void)
{
- return platform_driver_register(&lpass_core_cc_sc7180_driver);
+ int ret;
+
+ ret = platform_driver_register(&lpass_core_cc_sc7180_driver);
+ if (ret)
+ return ret;
+
+ return platform_driver_register(&lpass_hm_sc7180_driver);
}
-subsys_initcall(lpass_core_cc_sc7180_init);
+subsys_initcall(lpass_sc7180_init);

-static void __exit lpass_core_cc_sc7180_exit(void)
+static void __exit lpass_sc7180_exit(void)
{
+ platform_driver_unregister(&lpass_hm_sc7180_driver);
platform_driver_unregister(&lpass_core_cc_sc7180_driver);
}
-module_exit(lpass_core_cc_sc7180_exit);
+module_exit(lpass_sc7180_exit);

MODULE_DESCRIPTION("QTI LPASS_CORE_CC SC7180 Driver");
MODULE_LICENSE("GPL v2");
--
2.29.0.rc1.297.gfa9743e501-goog