1. Patchew
  2. linux
  3. [RFC PATCH 00/13] Add PFC support for Renesas RZ/V2H(P) SoC
  4. View patch

[RFC PATCH 08/13] pinctrl: renesas: pinctrl-rzg2l: Add function pointers for writing to PFC

Prabhakar posted 13 patches 1 year, 10 months ago
There is a newer version of this series
[RFC PATCH 08/13] pinctrl: renesas: pinctrl-rzg2l: Add function pointers for writing to PFC
Posted by Prabhakar 1 year, 10 months ago 
From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

On the RZ/G2L SoC, the PFCWE bit controls writing to PFC registers.
However, on the RZ/V2H(P) SoC, the PFCWE (REGWE_A on RZ/V2H) bit controls
writing to both PFC and PMC registers. To accommodate these differences
across SoC variants, introduce set_pfc_mode() and pm_set_pfc() function
pointers.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 drivers/pinctrl/renesas/pinctrl-rzg2l.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
index 705372faaeff..4cdebdbd8a04 100644
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -246,6 +246,8 @@ struct rzg2l_variable_pin_cfg {
 	u32 pin:3;
 };
 
+struct rzg2l_pinctrl;
+
 struct rzg2l_pinctrl_data {
 	const char * const *port_pins;
 	const u64 *port_pin_configs;
@@ -256,6 +258,8 @@ struct rzg2l_pinctrl_data {
 	const struct rzg2l_hwcfg *hwcfg;
 	const struct rzg2l_variable_pin_cfg *variable_pin_cfg;
 	unsigned int n_variable_pin_cfg;
+	void (*set_pfc_mode)(struct rzg2l_pinctrl *pctrl, u8 pin, u8 off, u8 func);
+	void (*pm_set_pfc)(struct rzg2l_pinctrl *pctrl);
 };
 
 /**
@@ -526,7 +530,7 @@ static int rzg2l_pinctrl_set_mux(struct pinctrl_dev *pctldev,
 		dev_dbg(pctrl->dev, "port:%u pin: %u off:%x PSEL:%u\n",
 			RZG2L_PIN_ID_TO_PORT(pins[i]), pin, off, psel_val[i] - hwcfg->func_base);
 
-		rzg2l_pinctrl_set_pfc_mode(pctrl, pin, off, psel_val[i] - hwcfg->func_base);
+		pctrl->data->set_pfc_mode(pctrl, pin, off, psel_val[i] - hwcfg->func_base);
 	}
 
 	return 0;
@@ -2607,7 +2611,7 @@ static int rzg2l_pinctrl_resume_noirq(struct device *dev)
 			writeb(cache->eth_poc[i], pctrl->base + ETH_POC(regs->eth_poc, i));
 	}
 
-	rzg2l_pinctrl_pm_setup_pfc(pctrl);
+	pctrl->data->pm_set_pfc(pctrl);
 	rzg2l_pinctrl_pm_setup_regs(pctrl, false);
 	rzg2l_pinctrl_pm_setup_dedicated_regs(pctrl, false);
 	rzg2l_gpio_irq_restore(pctrl);
@@ -2672,6 +2676,8 @@ static struct rzg2l_pinctrl_data r9a07g043_data = {
 	.variable_pin_cfg = r9a07g043f_variable_pin_cfg,
 	.n_variable_pin_cfg = ARRAY_SIZE(r9a07g043f_variable_pin_cfg),
 #endif
+	.set_pfc_mode = &rzg2l_pinctrl_set_pfc_mode,
+	.pm_set_pfc = &rzg2l_pinctrl_pm_setup_pfc,
 };
 
 static struct rzg2l_pinctrl_data r9a07g044_data = {
@@ -2683,6 +2689,8 @@ static struct rzg2l_pinctrl_data r9a07g044_data = {
 	.n_dedicated_pins = ARRAY_SIZE(rzg2l_dedicated_pins.common) +
 		ARRAY_SIZE(rzg2l_dedicated_pins.rzg2l_pins),
 	.hwcfg = &rzg2l_hwcfg,
+	.set_pfc_mode = &rzg2l_pinctrl_set_pfc_mode,
+	.pm_set_pfc = &rzg2l_pinctrl_pm_setup_pfc,
 };
 
 static struct rzg2l_pinctrl_data r9a08g045_data = {
@@ -2693,6 +2701,8 @@ static struct rzg2l_pinctrl_data r9a08g045_data = {
 	.n_port_pins = ARRAY_SIZE(r9a08g045_gpio_configs) * RZG2L_PINS_PER_PORT,
 	.n_dedicated_pins = ARRAY_SIZE(rzg3s_dedicated_pins),
 	.hwcfg = &rzg3s_hwcfg,
+	.set_pfc_mode = &rzg2l_pinctrl_set_pfc_mode,
+	.pm_set_pfc = &rzg2l_pinctrl_pm_setup_pfc,
 };
 
 static const struct of_device_id rzg2l_pinctrl_of_table[] = {
-- 
2.34.1
Re: [RFC PATCH 08/13] pinctrl: renesas: pinctrl-rzg2l: Add function pointers for writing to PFC
Posted by claudiu beznea 1 year, 10 months ago 
Hi, Prabhakar,

On 27.03.2024 00:28, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> 
> On the RZ/G2L SoC, the PFCWE bit controls writing to PFC registers.
> However, on the RZ/V2H(P) SoC, the PFCWE (REGWE_A on RZ/V2H) bit controls
> writing to both PFC and PMC registers. To accommodate these differences
> across SoC variants, introduce set_pfc_mode() and pm_set_pfc() function
> pointers.

I think the overall code can be simplified if you add  1 function that does
the lock/unlock for PWPR. See patch 13.

> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
>  drivers/pinctrl/renesas/pinctrl-rzg2l.c | 14 ++++++++++++--
>  1 file changed, 12 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> index 705372faaeff..4cdebdbd8a04 100644
> --- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> +++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> @@ -246,6 +246,8 @@ struct rzg2l_variable_pin_cfg {
>  	u32 pin:3;
>  };
>  
> +struct rzg2l_pinctrl;
> +
>  struct rzg2l_pinctrl_data {
>  	const char * const *port_pins;
>  	const u64 *port_pin_configs;
> @@ -256,6 +258,8 @@ struct rzg2l_pinctrl_data {
>  	const struct rzg2l_hwcfg *hwcfg;
>  	const struct rzg2l_variable_pin_cfg *variable_pin_cfg;
>  	unsigned int n_variable_pin_cfg;
> +	void (*set_pfc_mode)(struct rzg2l_pinctrl *pctrl, u8 pin, u8 off, u8 func);
> +	void (*pm_set_pfc)(struct rzg2l_pinctrl *pctrl);
>  };
>  
>  /**
> @@ -526,7 +530,7 @@ static int rzg2l_pinctrl_set_mux(struct pinctrl_dev *pctldev,
>  		dev_dbg(pctrl->dev, "port:%u pin: %u off:%x PSEL:%u\n",
>  			RZG2L_PIN_ID_TO_PORT(pins[i]), pin, off, psel_val[i] - hwcfg->func_base);
>  
> -		rzg2l_pinctrl_set_pfc_mode(pctrl, pin, off, psel_val[i] - hwcfg->func_base);
> +		pctrl->data->set_pfc_mode(pctrl, pin, off, psel_val[i] - hwcfg->func_base);
>  	}
>  
>  	return 0;
> @@ -2607,7 +2611,7 @@ static int rzg2l_pinctrl_resume_noirq(struct device *dev)
>  			writeb(cache->eth_poc[i], pctrl->base + ETH_POC(regs->eth_poc, i));
>  	}
>  
> -	rzg2l_pinctrl_pm_setup_pfc(pctrl);
> +	pctrl->data->pm_set_pfc(pctrl);
>  	rzg2l_pinctrl_pm_setup_regs(pctrl, false);
>  	rzg2l_pinctrl_pm_setup_dedicated_regs(pctrl, false);
>  	rzg2l_gpio_irq_restore(pctrl);
> @@ -2672,6 +2676,8 @@ static struct rzg2l_pinctrl_data r9a07g043_data = {
>  	.variable_pin_cfg = r9a07g043f_variable_pin_cfg,
>  	.n_variable_pin_cfg = ARRAY_SIZE(r9a07g043f_variable_pin_cfg),
>  #endif
> +	.set_pfc_mode = &rzg2l_pinctrl_set_pfc_mode,
> +	.pm_set_pfc = &rzg2l_pinctrl_pm_setup_pfc,
>  };
>  
>  static struct rzg2l_pinctrl_data r9a07g044_data = {
> @@ -2683,6 +2689,8 @@ static struct rzg2l_pinctrl_data r9a07g044_data = {
>  	.n_dedicated_pins = ARRAY_SIZE(rzg2l_dedicated_pins.common) +
>  		ARRAY_SIZE(rzg2l_dedicated_pins.rzg2l_pins),
>  	.hwcfg = &rzg2l_hwcfg,
> +	.set_pfc_mode = &rzg2l_pinctrl_set_pfc_mode,
> +	.pm_set_pfc = &rzg2l_pinctrl_pm_setup_pfc,
>  };
>  
>  static struct rzg2l_pinctrl_data r9a08g045_data = {
> @@ -2693,6 +2701,8 @@ static struct rzg2l_pinctrl_data r9a08g045_data = {
>  	.n_port_pins = ARRAY_SIZE(r9a08g045_gpio_configs) * RZG2L_PINS_PER_PORT,
>  	.n_dedicated_pins = ARRAY_SIZE(rzg3s_dedicated_pins),
>  	.hwcfg = &rzg3s_hwcfg,
> +	.set_pfc_mode = &rzg2l_pinctrl_set_pfc_mode,
> +	.pm_set_pfc = &rzg2l_pinctrl_pm_setup_pfc,
>  };
>  
>  static const struct of_device_id rzg2l_pinctrl_of_table[] = {
Re: [RFC PATCH 08/13] pinctrl: renesas: pinctrl-rzg2l: Add function pointers for writing to PFC
Posted by claudiu beznea 1 year, 10 months ago 

On 28.03.2024 10:02, claudiu beznea wrote:
> Hi, Prabhakar,
> 
> On 27.03.2024 00:28, Prabhakar wrote:
>> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>>
>> On the RZ/G2L SoC, the PFCWE bit controls writing to PFC registers.
>> However, on the RZ/V2H(P) SoC, the PFCWE (REGWE_A on RZ/V2H) bit controls
>> writing to both PFC and PMC registers. To accommodate these differences
>> across SoC variants, introduce set_pfc_mode() and pm_set_pfc() function
>> pointers.
> 
> I think the overall code can be simplified if you add  1 function that does
> the lock/unlock for PWPR. See patch 13.

I meant to say one function for lock and one for unlock.

> 
>>
>> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>> ---
>>  drivers/pinctrl/renesas/pinctrl-rzg2l.c | 14 ++++++++++++--
>>  1 file changed, 12 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
>> index 705372faaeff..4cdebdbd8a04 100644
>> --- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
>> +++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
>> @@ -246,6 +246,8 @@ struct rzg2l_variable_pin_cfg {
>>  	u32 pin:3;
>>  };
>>  
>> +struct rzg2l_pinctrl;
>> +
>>  struct rzg2l_pinctrl_data {
>>  	const char * const *port_pins;
>>  	const u64 *port_pin_configs;
>> @@ -256,6 +258,8 @@ struct rzg2l_pinctrl_data {
>>  	const struct rzg2l_hwcfg *hwcfg;
>>  	const struct rzg2l_variable_pin_cfg *variable_pin_cfg;
>>  	unsigned int n_variable_pin_cfg;
>> +	void (*set_pfc_mode)(struct rzg2l_pinctrl *pctrl, u8 pin, u8 off, u8 func);
>> +	void (*pm_set_pfc)(struct rzg2l_pinctrl *pctrl);
>>  };
>>  
>>  /**
>> @@ -526,7 +530,7 @@ static int rzg2l_pinctrl_set_mux(struct pinctrl_dev *pctldev,
>>  		dev_dbg(pctrl->dev, "port:%u pin: %u off:%x PSEL:%u\n",
>>  			RZG2L_PIN_ID_TO_PORT(pins[i]), pin, off, psel_val[i] - hwcfg->func_base);
>>  
>> -		rzg2l_pinctrl_set_pfc_mode(pctrl, pin, off, psel_val[i] - hwcfg->func_base);
>> +		pctrl->data->set_pfc_mode(pctrl, pin, off, psel_val[i] - hwcfg->func_base);
>>  	}
>>  
>>  	return 0;
>> @@ -2607,7 +2611,7 @@ static int rzg2l_pinctrl_resume_noirq(struct device *dev)
>>  			writeb(cache->eth_poc[i], pctrl->base + ETH_POC(regs->eth_poc, i));
>>  	}
>>  
>> -	rzg2l_pinctrl_pm_setup_pfc(pctrl);
>> +	pctrl->data->pm_set_pfc(pctrl);
>>  	rzg2l_pinctrl_pm_setup_regs(pctrl, false);
>>  	rzg2l_pinctrl_pm_setup_dedicated_regs(pctrl, false);
>>  	rzg2l_gpio_irq_restore(pctrl);
>> @@ -2672,6 +2676,8 @@ static struct rzg2l_pinctrl_data r9a07g043_data = {
>>  	.variable_pin_cfg = r9a07g043f_variable_pin_cfg,
>>  	.n_variable_pin_cfg = ARRAY_SIZE(r9a07g043f_variable_pin_cfg),
>>  #endif
>> +	.set_pfc_mode = &rzg2l_pinctrl_set_pfc_mode,
>> +	.pm_set_pfc = &rzg2l_pinctrl_pm_setup_pfc,
>>  };
>>  
>>  static struct rzg2l_pinctrl_data r9a07g044_data = {
>> @@ -2683,6 +2689,8 @@ static struct rzg2l_pinctrl_data r9a07g044_data = {
>>  	.n_dedicated_pins = ARRAY_SIZE(rzg2l_dedicated_pins.common) +
>>  		ARRAY_SIZE(rzg2l_dedicated_pins.rzg2l_pins),
>>  	.hwcfg = &rzg2l_hwcfg,
>> +	.set_pfc_mode = &rzg2l_pinctrl_set_pfc_mode,
>> +	.pm_set_pfc = &rzg2l_pinctrl_pm_setup_pfc,
>>  };
>>  
>>  static struct rzg2l_pinctrl_data r9a08g045_data = {
>> @@ -2693,6 +2701,8 @@ static struct rzg2l_pinctrl_data r9a08g045_data = {
>>  	.n_port_pins = ARRAY_SIZE(r9a08g045_gpio_configs) * RZG2L_PINS_PER_PORT,
>>  	.n_dedicated_pins = ARRAY_SIZE(rzg3s_dedicated_pins),
>>  	.hwcfg = &rzg3s_hwcfg,
>> +	.set_pfc_mode = &rzg2l_pinctrl_set_pfc_mode,
>> +	.pm_set_pfc = &rzg2l_pinctrl_pm_setup_pfc,
>>  };
>>  
>>  static const struct of_device_id rzg2l_pinctrl_of_table[] = {
Re: [RFC PATCH 08/13] pinctrl: renesas: pinctrl-rzg2l: Add function pointers for writing to PFC
Posted by Lad, Prabhakar 1 year, 10 months ago 
Hi Claudiu,

Thank you for the review.

On Thu, Mar 28, 2024 at 8:13 AM claudiu beznea <claudiu.beznea@tuxon.dev> wrote:
>
>
>
> On 28.03.2024 10:02, claudiu beznea wrote:
> > Hi, Prabhakar,
> >
> > On 27.03.2024 00:28, Prabhakar wrote:
> >> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> >>
> >> On the RZ/G2L SoC, the PFCWE bit controls writing to PFC registers.
> >> However, on the RZ/V2H(P) SoC, the PFCWE (REGWE_A on RZ/V2H) bit controls
> >> writing to both PFC and PMC registers. To accommodate these differences
> >> across SoC variants, introduce set_pfc_mode() and pm_set_pfc() function
> >> pointers.
> >
> > I think the overall code can be simplified if you add  1 function that does
> > the lock/unlock for PWPR. See patch 13.
>
> I meant to say one function for lock and one for unlock.
>
I agree, let me remodel it that way.

Cheers,
Prabhakar

Patchew 2.1-devel-b67e4c2

© 2016 - 2026 Red Hat, Inc.