diff mbox series

[v2,12/23] clk: mediatek: clk-mtk: Extend mtk_clk_simple_probe()

Message ID 20221223094259.87373-13-angelogioacchino.delregno@collabora.com (mailing list archive)
State Changes Requested, archived
Headers show
Series MediaTek clocks cleanups and improvements | expand

Commit Message

AngeloGioacchino Del Regno Dec. 23, 2022, 9:42 a.m. UTC 
As a preparation to increase probe functions commonization across
various MediaTek SoC clock controller drivers, extend function
mtk_clk_simple_probe() to be able to register not only gates, but
also fixed clocks, factors, muxes and composites.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 drivers/clk/mediatek/clk-mtk.c | 101 ++++++++++++++++++++++++++++++---
 drivers/clk/mediatek/clk-mtk.h |  10 ++++
 2 files changed, 103 insertions(+), 8 deletions(-)

Comments

Miles Chen Dec. 27, 2022, 4:22 p.m. UTC | #1 
> As a preparation to increase probe functions commonization across
> various MediaTek SoC clock controller drivers, extend function
> mtk_clk_simple_probe() to be able to register not only gates, but
> also fixed clocks, factors, muxes and composites.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

Thanks for doing this! I read the patch 23 first and I thought the
mtk_clk_simple_probe() cannot be used like that. So I got the whole series
and found this patch to extend mtk_clk_simple_probe. Cool.

Reviewed-by: Miles Chen <miles.chen@mediatek.com>
Chen-Yu Tsai Dec. 30, 2022, 7:14 a.m. UTC | #2 
On Fri, Dec 23, 2022 at 5:43 PM AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com> wrote:
>
> As a preparation to increase probe functions commonization across
> various MediaTek SoC clock controller drivers, extend function
> mtk_clk_simple_probe() to be able to register not only gates, but
> also fixed clocks, factors, muxes and composites.
>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---
>  drivers/clk/mediatek/clk-mtk.c | 101 ++++++++++++++++++++++++++++++---
>  drivers/clk/mediatek/clk-mtk.h |  10 ++++
>  2 files changed, 103 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
> index d05364e17e95..b0a6225cd7b2 100644
> --- a/drivers/clk/mediatek/clk-mtk.c
> +++ b/drivers/clk/mediatek/clk-mtk.c
> @@ -11,12 +11,14 @@
>  #include <linux/mfd/syscon.h>
>  #include <linux/module.h>
>  #include <linux/of.h>
> +#include <linux/of_address.h>
>  #include <linux/of_device.h>
>  #include <linux/platform_device.h>
>  #include <linux/slab.h>
>
>  #include "clk-mtk.h"
>  #include "clk-gate.h"
> +#include "clk-mux.h"
>
>  const struct mtk_gate_regs cg_regs_dummy = { 0, 0, 0 };
>
> @@ -465,20 +467,71 @@ int mtk_clk_simple_probe(struct platform_device *pdev)
>         const struct mtk_clk_desc *mcd;
>         struct clk_hw_onecell_data *clk_data;
>         struct device_node *node = pdev->dev.of_node;
> -       int r;
> +       void __iomem *base;
> +       int num_clks, r;
>
>         mcd = of_device_get_match_data(&pdev->dev);
>         if (!mcd)
>                 return -EINVAL;
>
> -       clk_data = mtk_alloc_clk_data(mcd->num_clks);
> +       /* Composite clocks needs us to pass iomem pointer */
> +       if (mcd->composite_clks) {
> +               if (!mcd->shared_io)
> +                       base = devm_platform_ioremap_resource(pdev, 0);
> +               else
> +                       base = of_iomap(node, 0);
> +
> +               if (IS_ERR_OR_NULL(base))
> +                       return IS_ERR(base) ? PTR_ERR(base) : -ENOMEM;
> +       }
> +
> +       /* Calculate how many clk_hw_onecell_data entries to allocate */
> +       num_clks = mcd->num_clks + mcd->num_composite_clks;
> +       num_clks += mcd->num_fixed_clks + mcd->num_factor_clks;
> +       num_clks += mcd->num_mux_clks;
> +
> +       clk_data = mtk_alloc_clk_data(num_clks);
>         if (!clk_data)
>                 return -ENOMEM;
>
> -       r = mtk_clk_register_gates(node, mcd->clks, mcd->num_clks,
> -                                  clk_data, &pdev->dev);
> -       if (r)
> -               goto free_data;
> +       if (mcd->fixed_clks) {
> +               r = mtk_clk_register_fixed_clks(mcd->fixed_clks,
> +                                               mcd->num_fixed_clks, clk_data);
> +               if (r)
> +                       goto free_data;
> +       }
> +
> +       if (mcd->factor_clks) {
> +               r = mtk_clk_register_factors(mcd->factor_clks,
> +                                            mcd->num_factor_clks, clk_data);
> +               if (r)
> +                       goto unregister_fixed_clks;
> +       }
> +
> +       if (mcd->mux_clks) {
> +               r = mtk_clk_register_muxes(mcd->mux_clks, mcd->num_mux_clks,
> +                                          node, mcd->clk_lock, clk_data,
> +                                          &pdev->dev);
> +               if (r)
> +                       goto unregister_factors;
> +       };
> +
> +       if (mcd->composite_clks) {
> +               /* We don't check composite_lock because it's optional */
> +               r = mtk_clk_register_composites(mcd->composite_clks,
> +                                               mcd->num_composite_clks,
> +                                               base, mcd->clk_lock,
> +                                               clk_data, &pdev->dev);
> +               if (r)
> +                       goto unregister_muxes;
> +       }
> +
> +       if (mcd->clks) {
> +               r = mtk_clk_register_gates(node, mcd->clks, mcd->num_clks,
> +                                          clk_data, &pdev->dev);
> +               if (r)
> +                       goto unregister_composites;
> +       }
>
>         r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
>         if (r)
> @@ -496,9 +549,28 @@ int mtk_clk_simple_probe(struct platform_device *pdev)
>         return r;
>
>  unregister_clks:
> -       mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
> +       if (mcd->clks)
> +               mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
> +unregister_composites:
> +       if (mcd->composite_clks)
> +               mtk_clk_unregister_composites(mcd->composite_clks,
> +                                             mcd->num_composite_clks, clk_data);
> +unregister_muxes:
> +       if (mcd->mux_clks)
> +               mtk_clk_unregister_muxes(mcd->mux_clks,
> +                                        mcd->num_mux_clks, clk_data);
> +unregister_factors:
> +       if (mcd->factor_clks)
> +               mtk_clk_unregister_factors(mcd->factor_clks,
> +                                          mcd->num_factor_clks, clk_data);
> +unregister_fixed_clks:
> +       if (mcd->fixed_clks)
> +               mtk_clk_unregister_fixed_clks(mcd->fixed_clks,
> +                                             mcd->num_fixed_clks, clk_data);
>  free_data:
>         mtk_free_clk_data(clk_data);
> +       if (mcd->shared_io && base)
> +               iounmap(base);
>         return r;
>  }
>  EXPORT_SYMBOL_GPL(mtk_clk_simple_probe);
> @@ -510,7 +582,20 @@ int mtk_clk_simple_remove(struct platform_device *pdev)
>         struct device_node *node = pdev->dev.of_node;
>
>         of_clk_del_provider(node);
> -       mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
> +       if (mcd->clks)
> +               mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
> +       if (mcd->composite_clks)
> +               mtk_clk_unregister_composites(mcd->composite_clks,
> +                                             mcd->num_composite_clks, clk_data);
> +       if (mcd->mux_clks)
> +               mtk_clk_unregister_muxes(mcd->mux_clks,
> +                                        mcd->num_mux_clks, clk_data);
> +       if (mcd->factor_clks)
> +               mtk_clk_unregister_factors(mcd->factor_clks,
> +                                          mcd->num_factor_clks, clk_data);
> +       if (mcd->fixed_clks)
> +               mtk_clk_unregister_fixed_clks(mcd->fixed_clks,
> +                                             mcd->num_fixed_clks, clk_data);
>         mtk_free_clk_data(clk_data);
>
>         return 0;
> diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h
> index dd43235285db..1d036ba6ca07 100644
> --- a/drivers/clk/mediatek/clk-mtk.h
> +++ b/drivers/clk/mediatek/clk-mtk.h
> @@ -220,7 +220,17 @@ void mtk_clk_unregister_ref2usb_tx(struct clk_hw *hw);
>  struct mtk_clk_desc {
>         const struct mtk_gate *clks;
>         size_t num_clks;

I would've suggested renaming this to "gates" as well, but that seems
likely to cause additional unnecessary churn. Maybe you could leave
a comment in the header about this "historical reason"?

> +       const struct mtk_composite *composite_clks;
> +       size_t num_composite_clks;
> +       const struct mtk_fixed_clk *fixed_clks;
> +       size_t num_fixed_clks;
> +       const struct mtk_fixed_factor *factor_clks;
> +       size_t num_factor_clks;
> +       const struct mtk_mux *mux_clks;
> +       size_t num_mux_clks;

Nit: I would order these based on the order they are used/registered.

Otherwise,

Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>

>         const struct mtk_clk_rst_desc *rst_desc;
> +       spinlock_t *clk_lock;
> +       bool shared_io;
>  };
>
>  int mtk_clk_simple_probe(struct platform_device *pdev);
> --
> 2.39.0
>
diff mbox series

Patch

diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
index d05364e17e95..b0a6225cd7b2 100644
--- a/drivers/clk/mediatek/clk-mtk.c
+++ b/drivers/clk/mediatek/clk-mtk.c
@@ -11,12 +11,14 @@ 
 #include <linux/mfd/syscon.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_address.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 
 #include "clk-mtk.h"
 #include "clk-gate.h"
+#include "clk-mux.h"
 
 const struct mtk_gate_regs cg_regs_dummy = { 0, 0, 0 };
 
@@ -465,20 +467,71 @@  int mtk_clk_simple_probe(struct platform_device *pdev)
 	const struct mtk_clk_desc *mcd;
 	struct clk_hw_onecell_data *clk_data;
 	struct device_node *node = pdev->dev.of_node;
-	int r;
+	void __iomem *base;
+	int num_clks, r;
 
 	mcd = of_device_get_match_data(&pdev->dev);
 	if (!mcd)
 		return -EINVAL;
 
-	clk_data = mtk_alloc_clk_data(mcd->num_clks);
+	/* Composite clocks needs us to pass iomem pointer */
+	if (mcd->composite_clks) {
+		if (!mcd->shared_io)
+			base = devm_platform_ioremap_resource(pdev, 0);
+		else
+			base = of_iomap(node, 0);
+
+		if (IS_ERR_OR_NULL(base))
+			return IS_ERR(base) ? PTR_ERR(base) : -ENOMEM;
+	}
+
+	/* Calculate how many clk_hw_onecell_data entries to allocate */
+	num_clks = mcd->num_clks + mcd->num_composite_clks;
+	num_clks += mcd->num_fixed_clks + mcd->num_factor_clks;
+	num_clks += mcd->num_mux_clks;
+
+	clk_data = mtk_alloc_clk_data(num_clks);
 	if (!clk_data)
 		return -ENOMEM;
 
-	r = mtk_clk_register_gates(node, mcd->clks, mcd->num_clks,
-				   clk_data, &pdev->dev);
-	if (r)
-		goto free_data;
+	if (mcd->fixed_clks) {
+		r = mtk_clk_register_fixed_clks(mcd->fixed_clks,
+						mcd->num_fixed_clks, clk_data);
+		if (r)
+			goto free_data;
+	}
+
+	if (mcd->factor_clks) {
+		r = mtk_clk_register_factors(mcd->factor_clks,
+					     mcd->num_factor_clks, clk_data);
+		if (r)
+			goto unregister_fixed_clks;
+	}
+
+	if (mcd->mux_clks) {
+		r = mtk_clk_register_muxes(mcd->mux_clks, mcd->num_mux_clks,
+					   node, mcd->clk_lock, clk_data,
+					   &pdev->dev);
+		if (r)
+			goto unregister_factors;
+	};
+
+	if (mcd->composite_clks) {
+		/* We don't check composite_lock because it's optional */
+		r = mtk_clk_register_composites(mcd->composite_clks,
+						mcd->num_composite_clks,
+						base, mcd->clk_lock,
+						clk_data, &pdev->dev);
+		if (r)
+			goto unregister_muxes;
+	}
+
+	if (mcd->clks) {
+		r = mtk_clk_register_gates(node, mcd->clks, mcd->num_clks,
+					   clk_data, &pdev->dev);
+		if (r)
+			goto unregister_composites;
+	}
 
 	r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
 	if (r)
@@ -496,9 +549,28 @@  int mtk_clk_simple_probe(struct platform_device *pdev)
 	return r;
 
 unregister_clks:
-	mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
+	if (mcd->clks)
+		mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
+unregister_composites:
+	if (mcd->composite_clks)
+		mtk_clk_unregister_composites(mcd->composite_clks,
+					      mcd->num_composite_clks, clk_data);
+unregister_muxes:
+	if (mcd->mux_clks)
+		mtk_clk_unregister_muxes(mcd->mux_clks,
+					 mcd->num_mux_clks, clk_data);
+unregister_factors:
+	if (mcd->factor_clks)
+		mtk_clk_unregister_factors(mcd->factor_clks,
+					   mcd->num_factor_clks, clk_data);
+unregister_fixed_clks:
+	if (mcd->fixed_clks)
+		mtk_clk_unregister_fixed_clks(mcd->fixed_clks,
+					      mcd->num_fixed_clks, clk_data);
 free_data:
 	mtk_free_clk_data(clk_data);
+	if (mcd->shared_io && base)
+		iounmap(base);
 	return r;
 }
 EXPORT_SYMBOL_GPL(mtk_clk_simple_probe);
@@ -510,7 +582,20 @@  int mtk_clk_simple_remove(struct platform_device *pdev)
 	struct device_node *node = pdev->dev.of_node;
 
 	of_clk_del_provider(node);
-	mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
+	if (mcd->clks)
+		mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
+	if (mcd->composite_clks)
+		mtk_clk_unregister_composites(mcd->composite_clks,
+					      mcd->num_composite_clks, clk_data);
+	if (mcd->mux_clks)
+		mtk_clk_unregister_muxes(mcd->mux_clks,
+					 mcd->num_mux_clks, clk_data);
+	if (mcd->factor_clks)
+		mtk_clk_unregister_factors(mcd->factor_clks,
+					   mcd->num_factor_clks, clk_data);
+	if (mcd->fixed_clks)
+		mtk_clk_unregister_fixed_clks(mcd->fixed_clks,
+					      mcd->num_fixed_clks, clk_data);
 	mtk_free_clk_data(clk_data);
 
 	return 0;
diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h
index dd43235285db..1d036ba6ca07 100644
--- a/drivers/clk/mediatek/clk-mtk.h
+++ b/drivers/clk/mediatek/clk-mtk.h
@@ -220,7 +220,17 @@  void mtk_clk_unregister_ref2usb_tx(struct clk_hw *hw);
 struct mtk_clk_desc {
 	const struct mtk_gate *clks;
 	size_t num_clks;
+	const struct mtk_composite *composite_clks;
+	size_t num_composite_clks;
+	const struct mtk_fixed_clk *fixed_clks;
+	size_t num_fixed_clks;
+	const struct mtk_fixed_factor *factor_clks;
+	size_t num_factor_clks;
+	const struct mtk_mux *mux_clks;
+	size_t num_mux_clks;
 	const struct mtk_clk_rst_desc *rst_desc;
+	spinlock_t *clk_lock;
+	bool shared_io;
 };
 
 int mtk_clk_simple_probe(struct platform_device *pdev);