1. Patchew
  2. linux
  3. [PATCH 0/5] imx8mp: Add support to Run/Stall DSP via reset API
  4. View patch

[PATCH 3/5] reset: imx8mp-audiomix: Introduce active_low configuration option

Daniel Baluta posted 5 patches 10 months ago
There is a newer version of this series
[PATCH 3/5] reset: imx8mp-audiomix: Introduce active_low configuration option
Posted by Daniel Baluta 10 months ago 
For EARC and EARC PHY the reset happens when clearing the reset bits.
Refactor assert/deassert function in order to take into account
the active_low configuratin option.

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
---
 drivers/reset/reset-imx8mp-audiomix.c | 45 ++++++++++++++-------------
 1 file changed, 23 insertions(+), 22 deletions(-)

diff --git a/drivers/reset/reset-imx8mp-audiomix.c b/drivers/reset/reset-imx8mp-audiomix.c
index 6b1666c4e069..8cc0a6b58cbc 100644
--- a/drivers/reset/reset-imx8mp-audiomix.c
+++ b/drivers/reset/reset-imx8mp-audiomix.c
@@ -23,16 +23,19 @@
 struct imx8mp_reset_map {
 	unsigned int offset;
 	unsigned int mask;
+	bool active_low;
 };
 
 static const struct imx8mp_reset_map reset_map[IMX8MP_AUDIOMIX_RESET_NUM] = {
 	[IMX8MP_AUDIOMIX_EARC] = {
 		.offset	= IMX8MP_AUDIOMIX_EARC_OFFSET,
 		.mask	= IMX8MP_AUDIOMIX_EARC_RESET_MASK,
+		.active_low = true,
 	},
 	[IMX8MP_AUDIOMIX_EARC_PHY] = {
 		.offset	= IMX8MP_AUDIOMIX_EARC_OFFSET,
 		.mask	= IMX8MP_AUDIOMIX_EARC_PHY_RESET_MASK,
+		.active_low = true,
 	},
 
 };
@@ -48,48 +51,46 @@ static struct imx8mp_audiomix_reset *to_imx8mp_audiomix_reset(struct reset_contr
 	return container_of(rcdev, struct imx8mp_audiomix_reset, rcdev);
 }
 
-static int imx8mp_audiomix_reset_assert(struct reset_controller_dev *rcdev,
-					unsigned long id)
+static int imx8mp_audiomix_update(struct reset_controller_dev *rcdev,
+				  unsigned long id, bool assert)
 {
 	struct imx8mp_audiomix_reset *priv = to_imx8mp_audiomix_reset(rcdev);
 	void __iomem *reg_addr = priv->base;
-	unsigned int mask, offset, reg;
-	unsigned long flags;
+	unsigned int mask, offset, active_low;
+	unsigned long reg, flags;
 
 	if (id >=  IMX8MP_AUDIOMIX_RESET_NUM)
 		return -EINVAL;
 
 	mask = reset_map[id].mask;
 	offset = reset_map[id].offset;
+	active_low = reset_map[id].active_low;
 
 	spin_lock_irqsave(&priv->lock, flags);
+
 	reg = readl(reg_addr + offset);
-	writel(reg & ~mask, reg_addr + offset);
+	if (active_low ^ assert)
+		reg |= mask;
+	else
+		reg &= ~mask;
+	writel(reg, reg_addr + offset);
+
 	spin_unlock_irqrestore(&priv->lock, flags);
 
 	return 0;
 }
 
+
+static int imx8mp_audiomix_reset_assert(struct reset_controller_dev *rcdev,
+					unsigned long id)
+{
+	return imx8mp_audiomix_update(rcdev, id, true);
+}
+
 static int imx8mp_audiomix_reset_deassert(struct reset_controller_dev *rcdev,
 					  unsigned long id)
 {
-	struct imx8mp_audiomix_reset *priv = to_imx8mp_audiomix_reset(rcdev);
-	void __iomem *reg_addr = priv->base;
-	unsigned int mask, offset, reg;
-	unsigned long flags;
-
-	if (id >=  IMX8MP_AUDIOMIX_RESET_NUM)
-		return -EINVAL;
-
-	mask = reset_map[id].mask;
-	offset = reset_map[id].offset;
-
-	spin_lock_irqsave(&priv->lock, flags);
-	reg = readl(reg_addr + offset);
-	writel(reg | mask, reg_addr + offset);
-	spin_unlock_irqrestore(&priv->lock, flags);
-
-	return 0;
+	return imx8mp_audiomix_update(rcdev, id, false);
 }
 
 static const struct reset_control_ops imx8mp_audiomix_reset_ops = {
-- 
2.25.1
Re: [PATCH 3/5] reset: imx8mp-audiomix: Introduce active_low configuration option
Posted by Frank Li 10 months ago 
On Tue, Feb 18, 2025 at 10:57:10AM +0200, Daniel Baluta wrote:
> For EARC and EARC PHY the reset happens when clearing the reset bits.
> Refactor assert/deassert function in order to take into account
> the active_low configuratin option.
>
> Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>

Reviewed-by: Frank Li <Frank.Li@nxp.com>
> ---
>  drivers/reset/reset-imx8mp-audiomix.c | 45 ++++++++++++++-------------
>  1 file changed, 23 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/reset/reset-imx8mp-audiomix.c b/drivers/reset/reset-imx8mp-audiomix.c
> index 6b1666c4e069..8cc0a6b58cbc 100644
> --- a/drivers/reset/reset-imx8mp-audiomix.c
> +++ b/drivers/reset/reset-imx8mp-audiomix.c
> @@ -23,16 +23,19 @@
>  struct imx8mp_reset_map {
>  	unsigned int offset;
>  	unsigned int mask;
> +	bool active_low;
>  };
>
>  static const struct imx8mp_reset_map reset_map[IMX8MP_AUDIOMIX_RESET_NUM] = {
>  	[IMX8MP_AUDIOMIX_EARC] = {
>  		.offset	= IMX8MP_AUDIOMIX_EARC_OFFSET,
>  		.mask	= IMX8MP_AUDIOMIX_EARC_RESET_MASK,
> +		.active_low = true,
>  	},
>  	[IMX8MP_AUDIOMIX_EARC_PHY] = {
>  		.offset	= IMX8MP_AUDIOMIX_EARC_OFFSET,
>  		.mask	= IMX8MP_AUDIOMIX_EARC_PHY_RESET_MASK,
> +		.active_low = true,
>  	},
>
>  };
> @@ -48,48 +51,46 @@ static struct imx8mp_audiomix_reset *to_imx8mp_audiomix_reset(struct reset_contr
>  	return container_of(rcdev, struct imx8mp_audiomix_reset, rcdev);
>  }
>
> -static int imx8mp_audiomix_reset_assert(struct reset_controller_dev *rcdev,
> -					unsigned long id)
> +static int imx8mp_audiomix_update(struct reset_controller_dev *rcdev,
> +				  unsigned long id, bool assert)
>  {
>  	struct imx8mp_audiomix_reset *priv = to_imx8mp_audiomix_reset(rcdev);
>  	void __iomem *reg_addr = priv->base;
> -	unsigned int mask, offset, reg;
> -	unsigned long flags;
> +	unsigned int mask, offset, active_low;
> +	unsigned long reg, flags;
>
>  	if (id >=  IMX8MP_AUDIOMIX_RESET_NUM)
>  		return -EINVAL;
>
>  	mask = reset_map[id].mask;
>  	offset = reset_map[id].offset;
> +	active_low = reset_map[id].active_low;
>
>  	spin_lock_irqsave(&priv->lock, flags);
> +
>  	reg = readl(reg_addr + offset);
> -	writel(reg & ~mask, reg_addr + offset);
> +	if (active_low ^ assert)
> +		reg |= mask;
> +	else
> +		reg &= ~mask;
> +	writel(reg, reg_addr + offset);
> +
>  	spin_unlock_irqrestore(&priv->lock, flags);
>
>  	return 0;
>  }
>
> +
> +static int imx8mp_audiomix_reset_assert(struct reset_controller_dev *rcdev,
> +					unsigned long id)
> +{
> +	return imx8mp_audiomix_update(rcdev, id, true);
> +}
> +
>  static int imx8mp_audiomix_reset_deassert(struct reset_controller_dev *rcdev,
>  					  unsigned long id)
>  {
> -	struct imx8mp_audiomix_reset *priv = to_imx8mp_audiomix_reset(rcdev);
> -	void __iomem *reg_addr = priv->base;
> -	unsigned int mask, offset, reg;
> -	unsigned long flags;
> -
> -	if (id >=  IMX8MP_AUDIOMIX_RESET_NUM)
> -		return -EINVAL;
> -
> -	mask = reset_map[id].mask;
> -	offset = reset_map[id].offset;
> -
> -	spin_lock_irqsave(&priv->lock, flags);
> -	reg = readl(reg_addr + offset);
> -	writel(reg | mask, reg_addr + offset);
> -	spin_unlock_irqrestore(&priv->lock, flags);
> -
> -	return 0;
> +	return imx8mp_audiomix_update(rcdev, id, false);
>  }
>
>  static const struct reset_control_ops imx8mp_audiomix_reset_ops = {
> --
> 2.25.1
>
Re: [PATCH 3/5] reset: imx8mp-audiomix: Introduce active_low configuration option
Posted by Peng Fan 10 months ago 
On Tue, Feb 18, 2025 at 10:57:10AM +0200, Daniel Baluta wrote:
>For EARC and EARC PHY the reset happens when clearing the reset bits.
>Refactor assert/deassert function in order to take into account
>the active_low configuratin option.
>
>Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
>---
> drivers/reset/reset-imx8mp-audiomix.c | 45 ++++++++++++++-------------
> 1 file changed, 23 insertions(+), 22 deletions(-)
>
>diff --git a/drivers/reset/reset-imx8mp-audiomix.c b/drivers/reset/reset-imx8mp-audiomix.c
>index 6b1666c4e069..8cc0a6b58cbc 100644
>--- a/drivers/reset/reset-imx8mp-audiomix.c
>+++ b/drivers/reset/reset-imx8mp-audiomix.c
>@@ -23,16 +23,19 @@
> struct imx8mp_reset_map {
> 	unsigned int offset;
> 	unsigned int mask;
>+	bool active_low;

How about using u32 flags?
Then it will be easy to extend to add new FLAG in future in case.

If you tend to use bool, also ok to me:

Reviewed-by: Peng Fan <peng.fan@nxp.com>
Re: [PATCH 3/5] reset: imx8mp-audiomix: Introduce active_low configuration option
Posted by Philipp Zabel 10 months ago 
On Di, 2025-02-18 at 10:57 +0200, Daniel Baluta wrote:
> For EARC and EARC PHY the reset happens when clearing the reset bits.
> Refactor assert/deassert function in order to take into account
> the active_low configuratin option.
                            ^
                            missing 'o'.

> 
> Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
> ---
>  drivers/reset/reset-imx8mp-audiomix.c | 45 ++++++++++++++-------------
>  1 file changed, 23 insertions(+), 22 deletions(-)
> 
> diff --git a/drivers/reset/reset-imx8mp-audiomix.c b/drivers/reset/reset-imx8mp-audiomix.c
> index 6b1666c4e069..8cc0a6b58cbc 100644
> --- a/drivers/reset/reset-imx8mp-audiomix.c
> +++ b/drivers/reset/reset-imx8mp-audiomix.c
> @@ -23,16 +23,19 @@
>  struct imx8mp_reset_map {
>  	unsigned int offset;
>  	unsigned int mask;
> +	bool active_low;
>  };
>  
>  static const struct imx8mp_reset_map reset_map[IMX8MP_AUDIOMIX_RESET_NUM] = {
>  	[IMX8MP_AUDIOMIX_EARC] = {
>  		.offset	= IMX8MP_AUDIOMIX_EARC_OFFSET,
>  		.mask	= IMX8MP_AUDIOMIX_EARC_RESET_MASK,
> +		.active_low = true,
>  	},
>  	[IMX8MP_AUDIOMIX_EARC_PHY] = {
>  		.offset	= IMX8MP_AUDIOMIX_EARC_OFFSET,
>  		.mask	= IMX8MP_AUDIOMIX_EARC_PHY_RESET_MASK,
> +		.active_low = true,
>  	},
>  
>  };
> @@ -48,48 +51,46 @@ static struct imx8mp_audiomix_reset *to_imx8mp_audiomix_reset(struct reset_contr
>  	return container_of(rcdev, struct imx8mp_audiomix_reset, rcdev);
>  }
>  
> -static int imx8mp_audiomix_reset_assert(struct reset_controller_dev *rcdev,
> -					unsigned long id)
> +static int imx8mp_audiomix_update(struct reset_controller_dev *rcdev,
> +				  unsigned long id, bool assert)
>  {
>  	struct imx8mp_audiomix_reset *priv = to_imx8mp_audiomix_reset(rcdev);
>  	void __iomem *reg_addr = priv->base;
> -	unsigned int mask, offset, reg;
> -	unsigned long flags;
> +	unsigned int mask, offset, active_low;
> +	unsigned long reg, flags;

Nitpick, I would make active_low bool, like assert. Otherwise,

Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>

regards
Philipp
Re: [PATCH 3/5] reset: imx8mp-audiomix: Introduce active_low configuration option
Posted by Frank Li 10 months ago 
On Tue, Feb 18, 2025 at 10:30:21AM +0100, Philipp Zabel wrote:
> On Di, 2025-02-18 at 10:57 +0200, Daniel Baluta wrote:
> > For EARC and EARC PHY the reset happens when clearing the reset bits.
> > Refactor assert/deassert function in order to take into account
> > the active_low configuratin option.
>                             ^
>                             missing 'o'.

run ./scripts/checkpatch.pl -g HEAD --strict --codespell

Frank
>
> >
> > Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
> > ---
> >  drivers/reset/reset-imx8mp-audiomix.c | 45 ++++++++++++++-------------
> >  1 file changed, 23 insertions(+), 22 deletions(-)
> >
> > diff --git a/drivers/reset/reset-imx8mp-audiomix.c b/drivers/reset/reset-imx8mp-audiomix.c
> > index 6b1666c4e069..8cc0a6b58cbc 100644
> > --- a/drivers/reset/reset-imx8mp-audiomix.c
> > +++ b/drivers/reset/reset-imx8mp-audiomix.c
> > @@ -23,16 +23,19 @@
> >  struct imx8mp_reset_map {
> >  	unsigned int offset;
> >  	unsigned int mask;
> > +	bool active_low;
> >  };
> >
> >  static const struct imx8mp_reset_map reset_map[IMX8MP_AUDIOMIX_RESET_NUM] = {
> >  	[IMX8MP_AUDIOMIX_EARC] = {
> >  		.offset	= IMX8MP_AUDIOMIX_EARC_OFFSET,
> >  		.mask	= IMX8MP_AUDIOMIX_EARC_RESET_MASK,
> > +		.active_low = true,
> >  	},
> >  	[IMX8MP_AUDIOMIX_EARC_PHY] = {
> >  		.offset	= IMX8MP_AUDIOMIX_EARC_OFFSET,
> >  		.mask	= IMX8MP_AUDIOMIX_EARC_PHY_RESET_MASK,
> > +		.active_low = true,
> >  	},
> >
> >  };
> > @@ -48,48 +51,46 @@ static struct imx8mp_audiomix_reset *to_imx8mp_audiomix_reset(struct reset_contr
> >  	return container_of(rcdev, struct imx8mp_audiomix_reset, rcdev);
> >  }
> >
> > -static int imx8mp_audiomix_reset_assert(struct reset_controller_dev *rcdev,
> > -					unsigned long id)
> > +static int imx8mp_audiomix_update(struct reset_controller_dev *rcdev,
> > +				  unsigned long id, bool assert)
> >  {
> >  	struct imx8mp_audiomix_reset *priv = to_imx8mp_audiomix_reset(rcdev);
> >  	void __iomem *reg_addr = priv->base;
> > -	unsigned int mask, offset, reg;
> > -	unsigned long flags;
> > +	unsigned int mask, offset, active_low;
> > +	unsigned long reg, flags;
>
> Nitpick, I would make active_low bool, like assert. Otherwise,
>
> Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
>
> regards
> Philipp

Patchew 2.1-devel-b67e4c2

© 2016 - 2025 Red Hat, Inc.