[PATCH v5 0/5] clk: imx: clk-audiomix: Improvement for audiomix

[PATCH v5 0/5] clk: imx: clk-audiomix: Improvement for audiomix

[Shengjiu Wang]

Some improvement for audiomix driver:
Add reset controller for EARC function
Add CLK_SET_RATE_PARENT flags for clocks
Corrent parent clock for earc_phy and audpll clocks.

changes in v5:
- fix miss header issue reported by kernel test robot
- use scoped free

changes in v4:
- use auxiliary device framework for reset controller driver.
- drop syscon and simple-mfd related changes in v3

changes in v3:
- separate reset driver to driver/reset/
- add binding doc for reset driver.
- modify imx8mp.dtsi accordingly

changes in v2:
- add more info in commit messages

Shengjiu Wang (5):
  dt-bindings: clock: imx8mp: Add #reset-cells property
  clk: imx: clk-audiomix: Add reset controller
  reset: imx-aux: Add i.MX auxiliary reset driver
  clk: imx: clk-audiomix: Add CLK_SET_RATE_PARENT flags for clocks
  clk: imx: clk-audiomix: Corrent parent clock for earc_phy and audpll

 .../bindings/clock/imx8mp-audiomix.yaml       |   3 +
 drivers/clk/imx/Kconfig                       |   1 +
 drivers/clk/imx/clk-imx8mp-audiomix.c         |  83 ++++++-
 drivers/reset/Kconfig                         |   8 +
 drivers/reset/Makefile                        |   1 +
 drivers/reset/reset-imx-aux.c                 | 217 ++++++++++++++++++
 6 files changed, 307 insertions(+), 6 deletions(-)
 create mode 100644 drivers/reset/reset-imx-aux.c

-- 
2.34.1


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[PATCH v5 1/5] dt-bindings: clock: imx8mp: Add #reset-cells property

[Shengjiu Wang]

The Audio Block Control contains clock distribution and gating
controls, as well as reset handling to several of the AUDIOMIX
peripherals. Especially the reset controls for Enhanced Audio
Return Channel (EARC) PHY and Controller.

So make Audio Block Control a reset provider for EARC, which
is one of modules in this audio subsystem.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 Documentation/devicetree/bindings/clock/imx8mp-audiomix.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/clock/imx8mp-audiomix.yaml b/Documentation/devicetree/bindings/clock/imx8mp-audiomix.yaml
index 0a6dc1a6e122..6588a17a7d9a 100644
--- a/Documentation/devicetree/bindings/clock/imx8mp-audiomix.yaml
+++ b/Documentation/devicetree/bindings/clock/imx8mp-audiomix.yaml
@@ -44,6 +44,9 @@ properties:
       ID in its "clocks" phandle cell. See include/dt-bindings/clock/imx8mp-clock.h
       for the full list of i.MX8MP IMX8MP_CLK_AUDIOMIX_ clock IDs.
 
+  '#reset-cells':
+    const: 1
+
 required:
   - compatible
   - reg
-- 
2.34.1


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[PATCH v5 2/5] clk: imx: clk-audiomix: Add reset controller

[Shengjiu Wang]

Audiomix block control can be a reset controller for
Enhanced Audio Return Channel (EARC), which is one of
modules in this audiomix subsystem.

The reset controller is supported by the auxiliary device
framework.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
 drivers/clk/imx/Kconfig               |  1 +
 drivers/clk/imx/clk-imx8mp-audiomix.c | 60 +++++++++++++++++++++++++++
 2 files changed, 61 insertions(+)

diff --git a/drivers/clk/imx/Kconfig b/drivers/clk/imx/Kconfig
index 6da0fba68225..9edfb030bea9 100644
--- a/drivers/clk/imx/Kconfig
+++ b/drivers/clk/imx/Kconfig
@@ -81,6 +81,7 @@ config CLK_IMX8MP
 	tristate "IMX8MP CCM Clock Driver"
 	depends on ARCH_MXC || COMPILE_TEST
 	select MXC_CLK
+	select AUXILIARY_BUS
 	help
 	    Build the driver for i.MX8MP CCM Clock Driver
 
diff --git a/drivers/clk/imx/clk-imx8mp-audiomix.c b/drivers/clk/imx/clk-imx8mp-audiomix.c
index b381d6f784c8..2ee68f518850 100644
--- a/drivers/clk/imx/clk-imx8mp-audiomix.c
+++ b/drivers/clk/imx/clk-imx8mp-audiomix.c
@@ -5,6 +5,7 @@
  * Copyright (C) 2022 Marek Vasut <marex@denx.de>
  */
 
+#include <linux/auxiliary_bus.h>
 #include <linux/clk-provider.h>
 #include <linux/device.h>
 #include <linux/io.h>
@@ -13,6 +14,7 @@
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
+#include <linux/slab.h>
 
 #include <dt-bindings/clock/imx8mp-clock.h>
 
@@ -217,6 +219,60 @@ struct clk_imx8mp_audiomix_priv {
 	struct clk_hw_onecell_data clk_data;
 };
 
+#if IS_ENABLED(CONFIG_RESET_CONTROLLER)
+
+static void clk_imx8mp_audiomix_reset_unregister_adev(void *_adev)
+{
+	struct auxiliary_device *adev = _adev;
+
+	auxiliary_device_delete(adev);
+	auxiliary_device_uninit(adev);
+}
+
+static void clk_imx8mp_audiomix_reset_adev_release(struct device *dev)
+{
+	struct auxiliary_device *adev = to_auxiliary_dev(dev);
+
+	kfree(adev);
+}
+
+static int clk_imx8mp_audiomix_reset_controller_register(struct device *dev,
+							 struct clk_imx8mp_audiomix_priv *priv)
+{
+	struct auxiliary_device __free(kfree) * adev = NULL;
+	int ret;
+
+	adev = kzalloc(sizeof(*adev), GFP_KERNEL);
+	if (!adev)
+		return -ENOMEM;
+
+	adev->name = "reset";
+	adev->dev.parent = dev;
+	adev->dev.release = clk_imx8mp_audiomix_reset_adev_release;
+
+	ret = auxiliary_device_init(adev);
+	if (ret)
+		return ret;
+
+	ret = auxiliary_device_add(adev);
+	if (ret) {
+		auxiliary_device_uninit(adev);
+		return ret;
+	}
+
+	return devm_add_action_or_reset(dev, clk_imx8mp_audiomix_reset_unregister_adev,
+					no_free_ptr(adev));
+}
+
+#else /* !CONFIG_RESET_CONTROLLER */
+
+static int clk_imx8mp_audiomix_reset_controller_register(struct clk_imx8mp_audiomix_priv *priv)
+{
+	return 0;
+}
+
+#endif /* !CONFIG_RESET_CONTROLLER */
+
 static void clk_imx8mp_audiomix_save_restore(struct device *dev, bool save)
 {
 	struct clk_imx8mp_audiomix_priv *priv = dev_get_drvdata(dev);
@@ -337,6 +393,10 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_clk_register;
 
+	ret = clk_imx8mp_audiomix_reset_controller_register(dev, priv);
+	if (ret)
+		goto err_clk_register;
+
 	pm_runtime_put_sync(dev);
 	return 0;
 
-- 
2.34.1


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Re: [PATCH v5 2/5] clk: imx: clk-audiomix: Add reset controller

[Frank Li]

On Thu, May 23, 2024 at 05:59:47PM +0800, Shengjiu Wang wrote:
> Audiomix block control can be a reset controller for
> Enhanced Audio Return Channel (EARC), which is one of
> modules in this audiomix subsystem.
> 
> The reset controller is supported by the auxiliary device
> framework.
> 
> Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
> ---
>  drivers/clk/imx/Kconfig               |  1 +
>  drivers/clk/imx/clk-imx8mp-audiomix.c | 60 +++++++++++++++++++++++++++
>  2 files changed, 61 insertions(+)
> 
> diff --git a/drivers/clk/imx/Kconfig b/drivers/clk/imx/Kconfig
> index 6da0fba68225..9edfb030bea9 100644
> --- a/drivers/clk/imx/Kconfig
> +++ b/drivers/clk/imx/Kconfig
> @@ -81,6 +81,7 @@ config CLK_IMX8MP
>  	tristate "IMX8MP CCM Clock Driver"
>  	depends on ARCH_MXC || COMPILE_TEST
>  	select MXC_CLK
> +	select AUXILIARY_BUS
>  	help
>  	    Build the driver for i.MX8MP CCM Clock Driver
>  
> diff --git a/drivers/clk/imx/clk-imx8mp-audiomix.c b/drivers/clk/imx/clk-imx8mp-audiomix.c
> index b381d6f784c8..2ee68f518850 100644
> --- a/drivers/clk/imx/clk-imx8mp-audiomix.c
> +++ b/drivers/clk/imx/clk-imx8mp-audiomix.c
> @@ -5,6 +5,7 @@
>   * Copyright (C) 2022 Marek Vasut <marex@denx.de>
>   */
>  
> +#include <linux/auxiliary_bus.h>
>  #include <linux/clk-provider.h>
>  #include <linux/device.h>
>  #include <linux/io.h>
> @@ -13,6 +14,7 @@
>  #include <linux/of.h>
>  #include <linux/platform_device.h>
>  #include <linux/pm_runtime.h>
> +#include <linux/slab.h>
>  
>  #include <dt-bindings/clock/imx8mp-clock.h>
>  
> @@ -217,6 +219,60 @@ struct clk_imx8mp_audiomix_priv {
>  	struct clk_hw_onecell_data clk_data;
>  };
>  
> +#if IS_ENABLED(CONFIG_RESET_CONTROLLER)
> +
> +static void clk_imx8mp_audiomix_reset_unregister_adev(void *_adev)
> +{
> +	struct auxiliary_device *adev = _adev;
> +
> +	auxiliary_device_delete(adev);
> +	auxiliary_device_uninit(adev);
> +}
> +
> +static void clk_imx8mp_audiomix_reset_adev_release(struct device *dev)
> +{
> +	struct auxiliary_device *adev = to_auxiliary_dev(dev);
> +
> +	kfree(adev);
> +}
> +
> +static int clk_imx8mp_audiomix_reset_controller_register(struct device *dev,
> +							 struct clk_imx8mp_audiomix_priv *priv)
> +{
> +	struct auxiliary_device __free(kfree) * adev = NULL;

nit:  *adev = NULL;

Reviewed-by: Frank Li <Frank.Li@nxp.com>

> +	int ret;
> +
> +	adev = kzalloc(sizeof(*adev), GFP_KERNEL);
> +	if (!adev)
> +		return -ENOMEM;
> +
> +	adev->name = "reset";
> +	adev->dev.parent = dev;
> +	adev->dev.release = clk_imx8mp_audiomix_reset_adev_release;
> +
> +	ret = auxiliary_device_init(adev);
> +	if (ret)
> +		return ret;
> +
> +	ret = auxiliary_device_add(adev);
> +	if (ret) {
> +		auxiliary_device_uninit(adev);
> +		return ret;
> +	}
> +
> +	return devm_add_action_or_reset(dev, clk_imx8mp_audiomix_reset_unregister_adev,
> +					no_free_ptr(adev));
> +}
> +
> +#else /* !CONFIG_RESET_CONTROLLER */
> +
> +static int clk_imx8mp_audiomix_reset_controller_register(struct clk_imx8mp_audiomix_priv *priv)
> +{
> +	return 0;
> +}
> +
> +#endif /* !CONFIG_RESET_CONTROLLER */
> +
>  static void clk_imx8mp_audiomix_save_restore(struct device *dev, bool save)
>  {
>  	struct clk_imx8mp_audiomix_priv *priv = dev_get_drvdata(dev);
> @@ -337,6 +393,10 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev)
>  	if (ret)
>  		goto err_clk_register;
>  
> +	ret = clk_imx8mp_audiomix_reset_controller_register(dev, priv);
> +	if (ret)
> +		goto err_clk_register;
> +
>  	pm_runtime_put_sync(dev);
>  	return 0;
>  
> -- 
> 2.34.1
> 

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Re: [PATCH v5 2/5] clk: imx: clk-audiomix: Add reset controller

[Shengjiu Wang]

On Fri, May 24, 2024 at 4:36 AM Frank Li <Frank.li@nxp.com> wrote:
>
> On Thu, May 23, 2024 at 05:59:47PM +0800, Shengjiu Wang wrote:
> > Audiomix block control can be a reset controller for
> > Enhanced Audio Return Channel (EARC), which is one of
> > modules in this audiomix subsystem.
> >
> > The reset controller is supported by the auxiliary device
> > framework.
> >
> > Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
> > ---
> >  drivers/clk/imx/Kconfig               |  1 +
> >  drivers/clk/imx/clk-imx8mp-audiomix.c | 60 +++++++++++++++++++++++++++
> >  2 files changed, 61 insertions(+)
> >
> > diff --git a/drivers/clk/imx/Kconfig b/drivers/clk/imx/Kconfig
> > index 6da0fba68225..9edfb030bea9 100644
> > --- a/drivers/clk/imx/Kconfig
> > +++ b/drivers/clk/imx/Kconfig
> > @@ -81,6 +81,7 @@ config CLK_IMX8MP
> >       tristate "IMX8MP CCM Clock Driver"
> >       depends on ARCH_MXC || COMPILE_TEST
> >       select MXC_CLK
> > +     select AUXILIARY_BUS
> >       help
> >           Build the driver for i.MX8MP CCM Clock Driver
> >
> > diff --git a/drivers/clk/imx/clk-imx8mp-audiomix.c b/drivers/clk/imx/clk-imx8mp-audiomix.c
> > index b381d6f784c8..2ee68f518850 100644
> > --- a/drivers/clk/imx/clk-imx8mp-audiomix.c
> > +++ b/drivers/clk/imx/clk-imx8mp-audiomix.c
> > @@ -5,6 +5,7 @@
> >   * Copyright (C) 2022 Marek Vasut <marex@denx.de>
> >   */
> >
> > +#include <linux/auxiliary_bus.h>
> >  #include <linux/clk-provider.h>
> >  #include <linux/device.h>
> >  #include <linux/io.h>
> > @@ -13,6 +14,7 @@
> >  #include <linux/of.h>
> >  #include <linux/platform_device.h>
> >  #include <linux/pm_runtime.h>
> > +#include <linux/slab.h>
> >
> >  #include <dt-bindings/clock/imx8mp-clock.h>
> >
> > @@ -217,6 +219,60 @@ struct clk_imx8mp_audiomix_priv {
> >       struct clk_hw_onecell_data clk_data;
> >  };
> >
> > +#if IS_ENABLED(CONFIG_RESET_CONTROLLER)
> > +
> > +static void clk_imx8mp_audiomix_reset_unregister_adev(void *_adev)
> > +{
> > +     struct auxiliary_device *adev = _adev;
> > +
> > +     auxiliary_device_delete(adev);
> > +     auxiliary_device_uninit(adev);
> > +}
> > +
> > +static void clk_imx8mp_audiomix_reset_adev_release(struct device *dev)
> > +{
> > +     struct auxiliary_device *adev = to_auxiliary_dev(dev);
> > +
> > +     kfree(adev);
> > +}
> > +
> > +static int clk_imx8mp_audiomix_reset_controller_register(struct device *dev,
> > +                                                      struct clk_imx8mp_audiomix_priv *priv)
> > +{
> > +     struct auxiliary_device __free(kfree) * adev = NULL;
>
> nit:  *adev = NULL;

Actually,  the checkpatch.pl told me need to have space after '*'...

Best regards
Shengjiu Wang

>
> Reviewed-by: Frank Li <Frank.Li@nxp.com>
>
> > +     int ret;
> > +
> > +     adev = kzalloc(sizeof(*adev), GFP_KERNEL);
> > +     if (!adev)
> > +             return -ENOMEM;
> > +
> > +     adev->name = "reset";
> > +     adev->dev.parent = dev;
> > +     adev->dev.release = clk_imx8mp_audiomix_reset_adev_release;
> > +
> > +     ret = auxiliary_device_init(adev);
> > +     if (ret)
> > +             return ret;
> > +
> > +     ret = auxiliary_device_add(adev);
> > +     if (ret) {
> > +             auxiliary_device_uninit(adev);
> > +             return ret;
> > +     }
> > +
> > +     return devm_add_action_or_reset(dev, clk_imx8mp_audiomix_reset_unregister_adev,
> > +                                     no_free_ptr(adev));
> > +}
> > +
> > +#else /* !CONFIG_RESET_CONTROLLER */
> > +
> > +static int clk_imx8mp_audiomix_reset_controller_register(struct clk_imx8mp_audiomix_priv *priv)
> > +{
> > +     return 0;
> > +}
> > +
> > +#endif /* !CONFIG_RESET_CONTROLLER */
> > +
> >  static void clk_imx8mp_audiomix_save_restore(struct device *dev, bool save)
> >  {
> >       struct clk_imx8mp_audiomix_priv *priv = dev_get_drvdata(dev);
> > @@ -337,6 +393,10 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev)
> >       if (ret)
> >               goto err_clk_register;
> >
> > +     ret = clk_imx8mp_audiomix_reset_controller_register(dev, priv);
> > +     if (ret)
> > +             goto err_clk_register;
> > +
> >       pm_runtime_put_sync(dev);
> >       return 0;
> >
> > --
> > 2.34.1
> >

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Re: [PATCH v5 2/5] clk: imx: clk-audiomix: Add reset controller

[Dan Carpenter]

On Fri, May 24, 2024 at 09:49:08AM +0800, Shengjiu Wang wrote:
> On Fri, May 24, 2024 at 4:36 AM Frank Li <Frank.li@nxp.com> wrote:
> > > +static int clk_imx8mp_audiomix_reset_controller_register(struct device *dev,
> > > +                                                      struct clk_imx8mp_audiomix_priv *priv)
> > > +{
> > > +     struct auxiliary_device __free(kfree) * adev = NULL;
> >
> > nit:  *adev = NULL;
> 
> Actually,  the checkpatch.pl told me need to have space after '*'...

Someone should fix checkpatch so that it knows that __free() is an
attribute, not a function call.  (The cleanup.h stuff is quite new).

regards,
dan carpenter


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Re: [PATCH v5 2/5] clk: imx: clk-audiomix: Add reset controller

[Markus Elfring]

…
> The reset controller is supported by the auxiliary device
> framework.

Would you like to add an imperative wording for an improved change description?
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.9#n94


…
> +++ b/drivers/clk/imx/clk-imx8mp-audiomix.c
…
> +static int clk_imx8mp_audiomix_reset_controller_register(struct device *dev,
> +							 struct clk_imx8mp_audiomix_priv *priv)
> +{
> +	struct auxiliary_device __free(kfree) * adev = NULL;
> +	int ret;
> +
> +	adev = kzalloc(sizeof(*adev), GFP_KERNEL);
…

May the following source code variant be applied here?

	int ret;
	struct auxiliary_device __free(kfree) *adev = kzalloc(sizeof(*adev), GFP_KERNEL);


Regards,
Markus

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Re: [PATCH v5 2/5] clk: imx: clk-audiomix: Add reset controller

[Shengjiu Wang]

On Sat, May 25, 2024 at 3:27 PM Markus Elfring <Markus.Elfring@web.de> wrote:
>
> …
> > The reset controller is supported by the auxiliary device
> > framework.
>
> Would you like to add an imperative wording for an improved change description?
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.9#n94

ok, will update it.

>
>
> …
> > +++ b/drivers/clk/imx/clk-imx8mp-audiomix.c
> …
> > +static int clk_imx8mp_audiomix_reset_controller_register(struct device *dev,
> > +                                                      struct clk_imx8mp_audiomix_priv *priv)
> > +{
> > +     struct auxiliary_device __free(kfree) * adev = NULL;
> > +     int ret;
> > +
> > +     adev = kzalloc(sizeof(*adev), GFP_KERNEL);
> …
>
> May the following source code variant be applied here?
>
>         int ret;
>         struct auxiliary_device __free(kfree) *adev = kzalloc(sizeof(*adev), GFP_KERNEL);

ok, will update it.

best regards
Shengjiu Wang
>
>
> Regards,
> Markus

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[PATCH v5 3/5] reset: imx-aux: Add i.MX auxiliary reset driver

[Shengjiu Wang]

Add support for the resets on i.MX8MP Audio Block Control module.
The reset controller is created using the auxiliary device framework
and set up in the clock driver.

The EARC PHY software reset and EARC controller software
reset can be supported.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
 drivers/reset/Kconfig         |   8 ++
 drivers/reset/Makefile        |   1 +
 drivers/reset/reset-imx-aux.c | 217 ++++++++++++++++++++++++++++++++++
 3 files changed, 226 insertions(+)
 create mode 100644 drivers/reset/reset-imx-aux.c

diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index 7112f5932609..38fdf05b326b 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -91,6 +91,14 @@ config RESET_IMX7
 	help
 	  This enables the reset controller driver for i.MX7 SoCs.
 
+config RESET_IMX_AUX
+	tristate "i.MX Auxiliary Reset Driver"
+	depends on CLK_IMX8MP
+	select AUXILIARY_BUS
+	default CLK_IMX8MP
+	help
+	  This enables the auxiliary reset controller driver for i.MX.
+
 config RESET_INTEL_GW
 	bool "Intel Reset Controller Driver"
 	depends on X86 || COMPILE_TEST
diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile
index fd8b49fa46fc..f078da14c327 100644
--- a/drivers/reset/Makefile
+++ b/drivers/reset/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_RESET_BRCMSTB_RESCAL) += reset-brcmstb-rescal.o
 obj-$(CONFIG_RESET_GPIO) += reset-gpio.o
 obj-$(CONFIG_RESET_HSDK) += reset-hsdk.o
 obj-$(CONFIG_RESET_IMX7) += reset-imx7.o
+obj-$(CONFIG_RESET_IMX_AUX) += reset-imx-aux.o
 obj-$(CONFIG_RESET_INTEL_GW) += reset-intel-gw.o
 obj-$(CONFIG_RESET_K210) += reset-k210.o
 obj-$(CONFIG_RESET_LANTIQ) += reset-lantiq.o
diff --git a/drivers/reset/reset-imx-aux.c b/drivers/reset/reset-imx-aux.c
new file mode 100644
index 000000000000..61c353abc84e
--- /dev/null
+++ b/drivers/reset/reset-imx-aux.c
@@ -0,0 +1,217 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2024 NXP
+ */
+
+#include <linux/auxiliary_bus.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/reset-controller.h>
+
+/*
+ * The reset does not support the feature and corresponding
+ * values are not valid
+ */
+#define ASSERT_NONE     BIT(0)
+#define DEASSERT_NONE   BIT(1)
+#define STATUS_NONE     BIT(2)
+
+/* When set this function is activated by setting(vs clearing) this bit */
+#define ASSERT_SET      BIT(3)
+#define DEASSERT_SET    BIT(4)
+#define STATUS_SET      BIT(5)
+
+/* The following are the inverse of the above and are added for consistency */
+#define ASSERT_CLEAR    (0 << 3)
+#define DEASSERT_CLEAR  (0 << 4)
+#define STATUS_CLEAR    (0 << 5)
+
+/**
+ * struct imx_reset_ctrl - reset control structure
+ * @assert_offset: reset assert control register offset
+ * @assert_bit: reset assert bit in the reset assert control register
+ * @deassert_offset: reset deassert control register offset
+ * @deassert_bit: reset deassert bit in the reset deassert control register
+ * @status_offset: reset status register offset
+ * @status_bit: reset status bit in the reset status register
+ * @flags: reset flag indicating how the (de)assert and status are handled
+ */
+struct imx_reset_ctrl {
+	u32 assert_offset;
+	u32 assert_bit;
+	u32 deassert_offset;
+	u32 deassert_bit;
+	u32 status_offset;
+	u32 status_bit;
+	u32 flags;
+};
+
+struct imx_reset_data {
+	const struct imx_reset_ctrl *rst_ctrl;
+	size_t rst_ctrl_num;
+};
+
+struct imx_aux_reset_priv {
+	struct reset_controller_dev rcdev;
+	void __iomem *base;
+	const struct imx_reset_data *data;
+};
+
+static int imx_aux_reset_assert(struct reset_controller_dev *rcdev,
+				unsigned long id)
+{
+	struct imx_aux_reset_priv *priv = container_of(rcdev,
+					struct imx_aux_reset_priv, rcdev);
+	const struct imx_reset_data *data = priv->data;
+	void __iomem *reg_addr = priv->base;
+	const struct imx_reset_ctrl *ctrl;
+	unsigned int mask, value, reg;
+
+	if (id >= data->rst_ctrl_num)
+		return -EINVAL;
+
+	ctrl = &data->rst_ctrl[id];
+
+	/* assert not supported for this reset */
+	if (ctrl->flags & ASSERT_NONE)
+		return -EOPNOTSUPP;
+
+	mask = BIT(ctrl->assert_bit);
+	value = (ctrl->flags & ASSERT_SET) ? mask : 0x0;
+
+	reg = readl(reg_addr + ctrl->assert_offset);
+	writel(reg | value, reg_addr + ctrl->assert_offset);
+
+	return 0;
+}
+
+static int imx_aux_reset_deassert(struct reset_controller_dev *rcdev,
+				  unsigned long id)
+{
+	struct imx_aux_reset_priv *priv = container_of(rcdev,
+					struct imx_aux_reset_priv, rcdev);
+	const struct imx_reset_data *data = priv->data;
+	void __iomem *reg_addr = priv->base;
+	const struct imx_reset_ctrl *ctrl;
+	unsigned int mask, value, reg;
+
+	if (id >= data->rst_ctrl_num)
+		return -EINVAL;
+
+	ctrl = &data->rst_ctrl[id];
+
+	/* deassert not supported for this reset */
+	if (ctrl->flags & DEASSERT_NONE)
+		return -EOPNOTSUPP;
+
+	mask = BIT(ctrl->deassert_bit);
+	value = (ctrl->flags & DEASSERT_SET) ? mask : 0x0;
+
+	reg = readl(reg_addr + ctrl->deassert_offset);
+	writel(reg | value, reg_addr + ctrl->deassert_offset);
+
+	return 0;
+}
+
+static int imx_aux_reset_status(struct reset_controller_dev *rcdev,
+				unsigned long id)
+{
+	struct imx_aux_reset_priv *priv = container_of(rcdev,
+					struct imx_aux_reset_priv, rcdev);
+	const struct imx_reset_data *data = priv->data;
+	void __iomem *reg_addr = priv->base;
+	const struct imx_reset_ctrl *ctrl;
+	unsigned int reset_state;
+
+	if (id >= data->rst_ctrl_num)
+		return -EINVAL;
+
+	ctrl = &data->rst_ctrl[id];
+
+	/* status not supported for this reset */
+	if (ctrl->flags & STATUS_NONE)
+		return -EOPNOTSUPP;
+
+	reset_state = readl(reg_addr + ctrl->status_offset);
+
+	return !(reset_state & BIT(ctrl->status_bit)) ==
+		!(ctrl->flags & STATUS_SET);
+}
+
+static const struct reset_control_ops imx_aux_reset_ops = {
+	.assert   = imx_aux_reset_assert,
+	.deassert = imx_aux_reset_deassert,
+	.status	  = imx_aux_reset_status,
+};
+
+static int imx_aux_reset_probe(struct auxiliary_device *adev,
+			       const struct auxiliary_device_id *id)
+{
+	struct imx_reset_data *data = (struct imx_reset_data *)(id->driver_data);
+	struct imx_aux_reset_priv *priv;
+	struct device *dev = &adev->dev;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->rcdev.owner     = THIS_MODULE;
+	priv->rcdev.nr_resets = data->rst_ctrl_num;
+	priv->rcdev.ops       = &imx_aux_reset_ops;
+	priv->rcdev.of_node   = dev->parent->of_node;
+	priv->rcdev.dev	      = dev;
+	priv->rcdev.of_reset_n_cells = 1;
+	priv->base            = of_iomap(dev->parent->of_node, 0);
+	priv->data            = data;
+
+	return devm_reset_controller_register(dev, &priv->rcdev);
+}
+
+#define EARC  0x200
+
+static const struct imx_reset_ctrl imx8mp_audiomix_rst_ctrl[] = {
+	{
+		.assert_offset = EARC,
+		.assert_bit = 0,
+		.deassert_offset = EARC,
+		.deassert_bit = 0,
+		.flags  = ASSERT_CLEAR | DEASSERT_SET | STATUS_NONE,
+	},
+	{
+		.assert_offset = EARC,
+		.assert_bit = 1,
+		.deassert_offset = EARC,
+		.deassert_bit = 1,
+		.flags  = ASSERT_CLEAR | DEASSERT_SET | STATUS_NONE,
+	},
+};
+
+static const struct imx_reset_data imx8mp_audiomix_rst_data = {
+	.rst_ctrl = imx8mp_audiomix_rst_ctrl,
+	.rst_ctrl_num = ARRAY_SIZE(imx8mp_audiomix_rst_ctrl),
+};
+
+static const struct auxiliary_device_id imx_aux_reset_ids[] = {
+	{
+		.name = "clk_imx8mp_audiomix.reset",
+		.driver_data = (kernel_ulong_t)&imx8mp_audiomix_rst_data,
+	},
+	{ }
+};
+MODULE_DEVICE_TABLE(auxiliary, imx_aux_reset_ids);
+
+static struct auxiliary_driver imx_aux_reset_driver = {
+	.probe		= imx_aux_reset_probe,
+	.id_table	= imx_aux_reset_ids,
+};
+
+module_auxiliary_driver(imx_aux_reset_driver);
+
+MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
+MODULE_DESCRIPTION("Freescale i.MX auxiliary reset driver");
+MODULE_LICENSE("GPL");
-- 
2.34.1


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[PATCH v5 4/5] clk: imx: clk-audiomix: Add CLK_SET_RATE_PARENT flags for clocks

[Shengjiu Wang]

Add CLK_SET_RATE_PARENT flags that when the device driver sets the
child clock rate, parent clock frequency can be refined accordingly.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
 drivers/clk/imx/clk-imx8mp-audiomix.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/clk/imx/clk-imx8mp-audiomix.c b/drivers/clk/imx/clk-imx8mp-audiomix.c
index 2ee68f518850..cef01f1fa0b4 100644
--- a/drivers/clk/imx/clk-imx8mp-audiomix.c
+++ b/drivers/clk/imx/clk-imx8mp-audiomix.c
@@ -325,12 +325,12 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev)
 	for (i = 0; i < ARRAY_SIZE(sels); i++) {
 		if (sels[i].num_parents == 1) {
 			hw = devm_clk_hw_register_gate_parent_data(dev,
-				sels[i].name, &sels[i].parent, 0,
+				sels[i].name, &sels[i].parent, CLK_SET_RATE_PARENT,
 				base + sels[i].reg, sels[i].shift, 0, NULL);
 		} else {
 			hw = devm_clk_hw_register_mux_parent_data_table(dev,
 				sels[i].name, sels[i].parents,
-				sels[i].num_parents, 0,
+				sels[i].num_parents, CLK_SET_RATE_PARENT,
 				base + sels[i].reg,
 				sels[i].shift, sels[i].width,
 				0, NULL, NULL);
@@ -373,7 +373,8 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev)
 	clk_hw_data->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL_BYPASS] = hw;
 
 	hw = devm_clk_hw_register_gate(dev, "sai_pll_out", "sai_pll_bypass",
-				       0, base + SAI_PLL_GNRL_CTL, 13,
+				       CLK_SET_RATE_PARENT,
+				       base + SAI_PLL_GNRL_CTL, 13,
 				       0, NULL);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
@@ -382,7 +383,8 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev)
 	clk_hw_data->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL_OUT] = hw;
 
 	hw = devm_clk_hw_register_fixed_factor(dev, "sai_pll_out_div2",
-					       "sai_pll_out", 0, 1, 2);
+					       "sai_pll_out",
+					       CLK_SET_RATE_PARENT, 1, 2);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
 		goto err_clk_register;
-- 
2.34.1


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RE: [PATCH v5 4/5] clk: imx: clk-audiomix: Add CLK_SET_RATE_PARENT flags for clocks

[Peng Fan]

> Subject: [PATCH v5 4/5] clk: imx: clk-audiomix: Add CLK_SET_RATE_PARENT
> flags for clocks
> 
> Add CLK_SET_RATE_PARENT flags that when the device driver sets the child
> clock rate, parent clock frequency can be refined accordingly.
> 
> Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>

Reviewed-by: Peng Fan <peng.fan@nxp.com>

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[PATCH v5 5/5] clk: imx: clk-audiomix: Corrent parent clock for earc_phy and audpll

[Shengjiu Wang]

According to Reference Manual of i.MX8MP
The parent clock of "earc_phy" is "sai_pll_out_div2",
The parent clock of "audpll" is "osc_24m".

Add CLK_GATE_PARENT() macro for usage of specifying parent clock.

Fixes: 6cd95f7b151c ("clk: imx: imx8mp: Add audiomix block control")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
 drivers/clk/imx/clk-imx8mp-audiomix.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/imx/clk-imx8mp-audiomix.c b/drivers/clk/imx/clk-imx8mp-audiomix.c
index cef01f1fa0b4..01ac923a10ee 100644
--- a/drivers/clk/imx/clk-imx8mp-audiomix.c
+++ b/drivers/clk/imx/clk-imx8mp-audiomix.c
@@ -156,6 +156,15 @@ static const struct clk_parent_data clk_imx8mp_audiomix_pll_bypass_sels[] = {
 		PDM_SEL, 2, 0						\
 	}
 
+#define CLK_GATE_PARENT(gname, cname, pname)						\
+	{								\
+		gname"_cg",						\
+		IMX8MP_CLK_AUDIOMIX_##cname,				\
+		{ .fw_name = pname, .name = pname }, NULL, 1,		\
+		CLKEN0 + 4 * !!(IMX8MP_CLK_AUDIOMIX_##cname / 32),	\
+		1, IMX8MP_CLK_AUDIOMIX_##cname % 32			\
+	}
+
 struct clk_imx8mp_audiomix_sel {
 	const char			*name;
 	int				clkid;
@@ -173,14 +182,14 @@ static struct clk_imx8mp_audiomix_sel sels[] = {
 	CLK_GATE("earc", EARC_IPG),
 	CLK_GATE("ocrama", OCRAMA_IPG),
 	CLK_GATE("aud2htx", AUD2HTX_IPG),
-	CLK_GATE("earc_phy", EARC_PHY),
+	CLK_GATE_PARENT("earc_phy", EARC_PHY, "sai_pll_out_div2"),
 	CLK_GATE("sdma2", SDMA2_ROOT),
 	CLK_GATE("sdma3", SDMA3_ROOT),
 	CLK_GATE("spba2", SPBA2_ROOT),
 	CLK_GATE("dsp", DSP_ROOT),
 	CLK_GATE("dspdbg", DSPDBG_ROOT),
 	CLK_GATE("edma", EDMA_ROOT),
-	CLK_GATE("audpll", AUDPLL_ROOT),
+	CLK_GATE_PARENT("audpll", AUDPLL_ROOT, "osc_24m"),
 	CLK_GATE("mu2", MU2_ROOT),
 	CLK_GATE("mu3", MU3_ROOT),
 	CLK_PDM,
-- 
2.34.1


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RE: [PATCH v5 5/5] clk: imx: clk-audiomix: Corrent parent clock for earc_phy and audpll

[Peng Fan]

> Subject: [PATCH v5 5/5] clk: imx: clk-audiomix: Corrent parent clock for
> earc_phy and audpll
> 
> According to Reference Manual of i.MX8MP The parent clock of "earc_phy" is
> "sai_pll_out_div2", The parent clock of "audpll" is "osc_24m".
> 
> Add CLK_GATE_PARENT() macro for usage of specifying parent clock.
> 
> Fixes: 6cd95f7b151c ("clk: imx: imx8mp: Add audiomix block control")
> Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>

Reviewed-by: Peng Fan <peng.fan@nxp.com>

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Re: [PATCH v5 5/5] clk: imx: clk-audiomix: Corrent parent clock for earc_phy and audpll

[Markus Elfring]

> According to Reference Manual of i.MX8MP
> The parent clock of "earc_phy" is "sai_pll_out_div2",
> The parent clock of "audpll" is "osc_24m".
…
> Fixes: 6cd95f7b151c ("clk: imx: imx8mp: Add audiomix block control")

Does such information indicate that the word “Correct” would be more appropriate
(instead of “Corrent”) in the summary phrase?

Regards,
Markus

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Re: [PATCH v5 5/5] clk: imx: clk-audiomix: Corrent parent clock for earc_phy and audpll

[Shengjiu Wang]

On Sat, May 25, 2024 at 3:55 PM Markus Elfring <Markus.Elfring@web.de> wrote:
>
> > According to Reference Manual of i.MX8MP
> > The parent clock of "earc_phy" is "sai_pll_out_div2",
> > The parent clock of "audpll" is "osc_24m".
> …
> > Fixes: 6cd95f7b151c ("clk: imx: imx8mp: Add audiomix block control")
>
> Does such information indicate that the word “Correct” would be more appropriate
> (instead of “Corrent”) in the summary phrase?

Yes,  thanks for pointing out the typo.

best regards
Shengjiu Wang

>
> Regards,
> Markus

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