diff mbox series

[v11,1/3] PCI: rockchip: Simplify clock handling by using clk_bulk*() function

Message ID 20241202151150.7393-2-linux.amoon@gmail.com (mailing list archive)
State New
Headers show
Series [v11,1/3] PCI: rockchip: Simplify clock handling by using clk_bulk*() function | expand

Commit Message

Anand Moon Dec. 2, 2024, 3:11 p.m. UTC 
Currently, the driver acquires clks and prepare enable/disable unprepare
the clks individually thereby making the driver complex to read.
But this can be simplified by using the clk_bulk*() APIs.
Use devm_clk_bulk_get_all() API to acquire all the clks and use
clk_bulk_prepare_enable() to prepare enable clks
and clk_bulk_disable_unprepare() APIs disable unprepare them in bulk.

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Anand Moon <linux.amoon@gmail.com>
---
V11: None
V10: None
v9: Re write the commmit message.
v8: Improve the description of the code changes in commit messagee.
    Add Rb: Manivannan
v7: Update the functional change in commmit message.
v6: None.
v5: switch to use use devm_clk_bulk_get_all()? gets rid of hardcoding the
       clock names in driver.
v4: use dev_err_probe for error patch.
v3: Fix typo in commit message, dropped reported by.
v2: Fix compilation error reported by Intel test robot.
---
 drivers/pci/controller/pcie-rockchip.c | 65 +++-----------------------
 drivers/pci/controller/pcie-rockchip.h |  7 ++-
 2 files changed, 10 insertions(+), 62 deletions(-)

Comments

Anand Moon Dec. 26, 2024, 5:26 a.m. UTC | #1 
Hi All,

On Mon, 2 Dec 2024 at 20:42, Anand Moon <linux.amoon@gmail.com> wrote:
>
> Currently, the driver acquires clks and prepare enable/disable unprepare
> the clks individually thereby making the driver complex to read.
> But this can be simplified by using the clk_bulk*() APIs.
> Use devm_clk_bulk_get_all() API to acquire all the clks and use
> clk_bulk_prepare_enable() to prepare enable clks
> and clk_bulk_disable_unprepare() APIs disable unprepare them in bulk.
>
> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> Signed-off-by: Anand Moon <linux.amoon@gmail.com>
> ---

Gentle ping ?

Thanks
-Anand

> V11: None
> V10: None
> v9: Re write the commmit message.
> v8: Improve the description of the code changes in commit messagee.
>     Add Rb: Manivannan
> v7: Update the functional change in commmit message.
> v6: None.
> v5: switch to use use devm_clk_bulk_get_all()? gets rid of hardcoding the
>        clock names in driver.
> v4: use dev_err_probe for error patch.
> v3: Fix typo in commit message, dropped reported by.
> v2: Fix compilation error reported by Intel test robot.
> ---
>  drivers/pci/controller/pcie-rockchip.c | 65 +++-----------------------
>  drivers/pci/controller/pcie-rockchip.h |  7 ++-
>  2 files changed, 10 insertions(+), 62 deletions(-)
>
> diff --git a/drivers/pci/controller/pcie-rockchip.c b/drivers/pci/controller/pcie-rockchip.c
> index b9ade7632e11..53aaba03aca6 100644
> --- a/drivers/pci/controller/pcie-rockchip.c
> +++ b/drivers/pci/controller/pcie-rockchip.c
> @@ -129,29 +129,9 @@ int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
>                 return dev_err_probe(dev, PTR_ERR(rockchip->perst_gpio),
>                                      "failed to get PERST# GPIO\n");
>
> -       rockchip->aclk_pcie = devm_clk_get(dev, "aclk");
> -       if (IS_ERR(rockchip->aclk_pcie)) {
> -               dev_err(dev, "aclk clock not found\n");
> -               return PTR_ERR(rockchip->aclk_pcie);
> -       }
> -
> -       rockchip->aclk_perf_pcie = devm_clk_get(dev, "aclk-perf");
> -       if (IS_ERR(rockchip->aclk_perf_pcie)) {
> -               dev_err(dev, "aclk_perf clock not found\n");
> -               return PTR_ERR(rockchip->aclk_perf_pcie);
> -       }
> -
> -       rockchip->hclk_pcie = devm_clk_get(dev, "hclk");
> -       if (IS_ERR(rockchip->hclk_pcie)) {
> -               dev_err(dev, "hclk clock not found\n");
> -               return PTR_ERR(rockchip->hclk_pcie);
> -       }
> -
> -       rockchip->clk_pcie_pm = devm_clk_get(dev, "pm");
> -       if (IS_ERR(rockchip->clk_pcie_pm)) {
> -               dev_err(dev, "pm clock not found\n");
> -               return PTR_ERR(rockchip->clk_pcie_pm);
> -       }
> +       rockchip->num_clks = devm_clk_bulk_get_all(dev, &rockchip->clks);
> +       if (rockchip->num_clks < 0)
> +               return dev_err_probe(dev, err, "failed to get clocks\n");
>
>         return 0;
>  }
> @@ -375,39 +355,11 @@ int rockchip_pcie_enable_clocks(struct rockchip_pcie *rockchip)
>         struct device *dev = rockchip->dev;
>         int err;
>
> -       err = clk_prepare_enable(rockchip->aclk_pcie);
> -       if (err) {
> -               dev_err(dev, "unable to enable aclk_pcie clock\n");
> -               return err;
> -       }
> -
> -       err = clk_prepare_enable(rockchip->aclk_perf_pcie);
> -       if (err) {
> -               dev_err(dev, "unable to enable aclk_perf_pcie clock\n");
> -               goto err_aclk_perf_pcie;
> -       }
> -
> -       err = clk_prepare_enable(rockchip->hclk_pcie);
> -       if (err) {
> -               dev_err(dev, "unable to enable hclk_pcie clock\n");
> -               goto err_hclk_pcie;
> -       }
> -
> -       err = clk_prepare_enable(rockchip->clk_pcie_pm);
> -       if (err) {
> -               dev_err(dev, "unable to enable clk_pcie_pm clock\n");
> -               goto err_clk_pcie_pm;
> -       }
> +       err = clk_bulk_prepare_enable(rockchip->num_clks, rockchip->clks);
> +       if (err)
> +               return dev_err_probe(dev, err, "failed to enable clocks\n");
>
>         return 0;
> -
> -err_clk_pcie_pm:
> -       clk_disable_unprepare(rockchip->hclk_pcie);
> -err_hclk_pcie:
> -       clk_disable_unprepare(rockchip->aclk_perf_pcie);
> -err_aclk_perf_pcie:
> -       clk_disable_unprepare(rockchip->aclk_pcie);
> -       return err;
>  }
>  EXPORT_SYMBOL_GPL(rockchip_pcie_enable_clocks);
>
> @@ -415,10 +367,7 @@ void rockchip_pcie_disable_clocks(void *data)
>  {
>         struct rockchip_pcie *rockchip = data;
>
> -       clk_disable_unprepare(rockchip->clk_pcie_pm);
> -       clk_disable_unprepare(rockchip->hclk_pcie);
> -       clk_disable_unprepare(rockchip->aclk_perf_pcie);
> -       clk_disable_unprepare(rockchip->aclk_pcie);
> +       clk_bulk_disable_unprepare(rockchip->num_clks, rockchip->clks);
>  }
>  EXPORT_SYMBOL_GPL(rockchip_pcie_disable_clocks);
>
> diff --git a/drivers/pci/controller/pcie-rockchip.h b/drivers/pci/controller/pcie-rockchip.h
> index a51b087ce878..f79c0a1cbbd0 100644
> --- a/drivers/pci/controller/pcie-rockchip.h
> +++ b/drivers/pci/controller/pcie-rockchip.h
> @@ -11,6 +11,7 @@
>  #ifndef _PCIE_ROCKCHIP_H
>  #define _PCIE_ROCKCHIP_H
>
> +#include <linux/clk.h>
>  #include <linux/kernel.h>
>  #include <linux/pci.h>
>  #include <linux/pci-ecam.h>
> @@ -321,10 +322,8 @@ struct rockchip_pcie {
>         struct  reset_control *pm_rst;
>         struct  reset_control *aclk_rst;
>         struct  reset_control *pclk_rst;
> -       struct  clk *aclk_pcie;
> -       struct  clk *aclk_perf_pcie;
> -       struct  clk *hclk_pcie;
> -       struct  clk *clk_pcie_pm;
> +       struct  clk_bulk_data *clks;
> +       int     num_clks;
>         struct  regulator *vpcie12v; /* 12V power supply */
>         struct  regulator *vpcie3v3; /* 3.3V power supply */
>         struct  regulator *vpcie1v8; /* 1.8V power supply */
> --
> 2.47.0
>
diff mbox series

Patch

diff --git a/drivers/pci/controller/pcie-rockchip.c b/drivers/pci/controller/pcie-rockchip.c
index b9ade7632e11..53aaba03aca6 100644
--- a/drivers/pci/controller/pcie-rockchip.c
+++ b/drivers/pci/controller/pcie-rockchip.c
@@ -129,29 +129,9 @@  int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
 		return dev_err_probe(dev, PTR_ERR(rockchip->perst_gpio),
 				     "failed to get PERST# GPIO\n");
 
-	rockchip->aclk_pcie = devm_clk_get(dev, "aclk");
-	if (IS_ERR(rockchip->aclk_pcie)) {
-		dev_err(dev, "aclk clock not found\n");
-		return PTR_ERR(rockchip->aclk_pcie);
-	}
-
-	rockchip->aclk_perf_pcie = devm_clk_get(dev, "aclk-perf");
-	if (IS_ERR(rockchip->aclk_perf_pcie)) {
-		dev_err(dev, "aclk_perf clock not found\n");
-		return PTR_ERR(rockchip->aclk_perf_pcie);
-	}
-
-	rockchip->hclk_pcie = devm_clk_get(dev, "hclk");
-	if (IS_ERR(rockchip->hclk_pcie)) {
-		dev_err(dev, "hclk clock not found\n");
-		return PTR_ERR(rockchip->hclk_pcie);
-	}
-
-	rockchip->clk_pcie_pm = devm_clk_get(dev, "pm");
-	if (IS_ERR(rockchip->clk_pcie_pm)) {
-		dev_err(dev, "pm clock not found\n");
-		return PTR_ERR(rockchip->clk_pcie_pm);
-	}
+	rockchip->num_clks = devm_clk_bulk_get_all(dev, &rockchip->clks);
+	if (rockchip->num_clks < 0)
+		return dev_err_probe(dev, err, "failed to get clocks\n");
 
 	return 0;
 }
@@ -375,39 +355,11 @@  int rockchip_pcie_enable_clocks(struct rockchip_pcie *rockchip)
 	struct device *dev = rockchip->dev;
 	int err;
 
-	err = clk_prepare_enable(rockchip->aclk_pcie);
-	if (err) {
-		dev_err(dev, "unable to enable aclk_pcie clock\n");
-		return err;
-	}
-
-	err = clk_prepare_enable(rockchip->aclk_perf_pcie);
-	if (err) {
-		dev_err(dev, "unable to enable aclk_perf_pcie clock\n");
-		goto err_aclk_perf_pcie;
-	}
-
-	err = clk_prepare_enable(rockchip->hclk_pcie);
-	if (err) {
-		dev_err(dev, "unable to enable hclk_pcie clock\n");
-		goto err_hclk_pcie;
-	}
-
-	err = clk_prepare_enable(rockchip->clk_pcie_pm);
-	if (err) {
-		dev_err(dev, "unable to enable clk_pcie_pm clock\n");
-		goto err_clk_pcie_pm;
-	}
+	err = clk_bulk_prepare_enable(rockchip->num_clks, rockchip->clks);
+	if (err)
+		return dev_err_probe(dev, err, "failed to enable clocks\n");
 
 	return 0;
-
-err_clk_pcie_pm:
-	clk_disable_unprepare(rockchip->hclk_pcie);
-err_hclk_pcie:
-	clk_disable_unprepare(rockchip->aclk_perf_pcie);
-err_aclk_perf_pcie:
-	clk_disable_unprepare(rockchip->aclk_pcie);
-	return err;
 }
 EXPORT_SYMBOL_GPL(rockchip_pcie_enable_clocks);
 
@@ -415,10 +367,7 @@  void rockchip_pcie_disable_clocks(void *data)
 {
 	struct rockchip_pcie *rockchip = data;
 
-	clk_disable_unprepare(rockchip->clk_pcie_pm);
-	clk_disable_unprepare(rockchip->hclk_pcie);
-	clk_disable_unprepare(rockchip->aclk_perf_pcie);
-	clk_disable_unprepare(rockchip->aclk_pcie);
+	clk_bulk_disable_unprepare(rockchip->num_clks, rockchip->clks);
 }
 EXPORT_SYMBOL_GPL(rockchip_pcie_disable_clocks);
 
diff --git a/drivers/pci/controller/pcie-rockchip.h b/drivers/pci/controller/pcie-rockchip.h
index a51b087ce878..f79c0a1cbbd0 100644
--- a/drivers/pci/controller/pcie-rockchip.h
+++ b/drivers/pci/controller/pcie-rockchip.h
@@ -11,6 +11,7 @@ 
 #ifndef _PCIE_ROCKCHIP_H
 #define _PCIE_ROCKCHIP_H
 
+#include <linux/clk.h>
 #include <linux/kernel.h>
 #include <linux/pci.h>
 #include <linux/pci-ecam.h>
@@ -321,10 +322,8 @@  struct rockchip_pcie {
 	struct	reset_control *pm_rst;
 	struct	reset_control *aclk_rst;
 	struct	reset_control *pclk_rst;
-	struct	clk *aclk_pcie;
-	struct	clk *aclk_perf_pcie;
-	struct	clk *hclk_pcie;
-	struct	clk *clk_pcie_pm;
+	struct  clk_bulk_data *clks;
+	int	num_clks;
 	struct	regulator *vpcie12v; /* 12V power supply */
 	struct	regulator *vpcie3v3; /* 3.3V power supply */
 	struct	regulator *vpcie1v8; /* 1.8V power supply */