diff mbox series

[v4,08/21] PM / devfreq: rk3399_dmc,dfi: generalize DDRTYPE defines

Message ID 20230505113856.463650-9-s.hauer@pengutronix.de (mailing list archive)
State New, archived
Headers show
Series Add perf support to the rockchip-dfi driver | expand

Commit Message

Sascha Hauer May 5, 2023, 11:38 a.m. UTC 
The DDRTYPE defines are named to be RK3399 specific, but they can be
used for other Rockchip SoCs as well, so replace the RK3399_PMUGRF_
prefix with ROCKCHIP_. They are defined in a SoC specific header
file, so when generalizing the prefix also move the new defines to
a SoC agnostic header file. While at it use GENMASK to define the
DDRTYPE bitfield and give it a name including the full register name.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/devfreq/event/rockchip-dfi.c | 10 ++++++----
 drivers/devfreq/rk3399_dmc.c         | 10 +++++-----
 include/soc/rockchip/rk3399_grf.h    |  7 +------
 include/soc/rockchip/rockchip_grf.h  | 15 +++++++++++++++
 4 files changed, 27 insertions(+), 15 deletions(-)
 create mode 100644 include/soc/rockchip/rockchip_grf.h

Comments

Jonathan Cameron May 16, 2023, 3:54 p.m. UTC | #1 
On Fri,  5 May 2023 13:38:43 +0200
Sascha Hauer <s.hauer@pengutronix.de> wrote:

> The DDRTYPE defines are named to be RK3399 specific, but they can be
> used for other Rockchip SoCs as well, so replace the RK3399_PMUGRF_
> prefix with ROCKCHIP_. They are defined in a SoC specific header
> file, so when generalizing the prefix also move the new defines to
> a SoC agnostic header file. While at it use GENMASK to define the
> DDRTYPE bitfield and give it a name including the full register name.

Great - you covered this one a few patches later.

A few suggestions inline but this looks basically fine to me.
> 
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> ---
>  drivers/devfreq/event/rockchip-dfi.c | 10 ++++++----
>  drivers/devfreq/rk3399_dmc.c         | 10 +++++-----
>  include/soc/rockchip/rk3399_grf.h    |  7 +------
>  include/soc/rockchip/rockchip_grf.h  | 15 +++++++++++++++
>  4 files changed, 27 insertions(+), 15 deletions(-)
>  create mode 100644 include/soc/rockchip/rockchip_grf.h
> 
> diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c
> index 18d578730fd0c..7896cd8beb143 100644
> --- a/drivers/devfreq/event/rockchip-dfi.c
> +++ b/drivers/devfreq/event/rockchip-dfi.c
> @@ -18,7 +18,10 @@
>  #include <linux/list.h>
>  #include <linux/of.h>
>  #include <linux/of_device.h>
> +#include <linux/bitfield.h>
> +#include <linux/bits.h>

Why bits.h?

>  
> +#include <soc/rockchip/rockchip_grf.h>
>  #include <soc/rockchip/rk3399_grf.h>
>  
>  #define DMC_MAX_CHANNELS	2
> @@ -74,9 +77,9 @@ static void rockchip_dfi_start_hardware_counter(struct devfreq_event_dev *edev)
>  	writel_relaxed(CLR_DDRMON_CTRL, dfi_regs + DDRMON_CTRL);
>  
>  	/* set ddr type to dfi */
> -	if (dfi->ddr_type == RK3399_PMUGRF_DDRTYPE_LPDDR3)
> +	if (dfi->ddr_type == ROCKCHIP_DDRTYPE_LPDDR3)
>  		writel_relaxed(LPDDR3_EN, dfi_regs + DDRMON_CTRL);
> -	else if (dfi->ddr_type == RK3399_PMUGRF_DDRTYPE_LPDDR4)
> +	else if (dfi->ddr_type == ROCKCHIP_DDRTYPE_LPDDR4)
>  		writel_relaxed(LPDDR4_EN, dfi_regs + DDRMON_CTRL);

Maybe a switch statement here as well?  In particular I'm interested
that there is no sign of DDR3 or LPDDR2 here and I think it would be good to
make that explicit given it's defined.

>  
>  	/* enable count, use software mode */
> @@ -191,8 +194,7 @@ static int rk3399_dfi_init(struct rockchip_dfi *dfi)
>  
>  	/* get ddr type */
>  	regmap_read(regmap_pmu, RK3399_PMUGRF_OS_REG2, &val);
> -	dfi->ddr_type = (val >> RK3399_PMUGRF_DDRTYPE_SHIFT) &
> -			RK3399_PMUGRF_DDRTYPE_MASK;
> +	dfi->ddr_type = FIELD_GET(RK3399_PMUGRF_OS_REG2_DDRTYPE, val);
>  
>  	dfi->channel_mask = 3;
>  
> diff --git a/drivers/devfreq/rk3399_dmc.c b/drivers/devfreq/rk3399_dmc.c
> index daff407026157..fd2c5ffedf41e 100644
> --- a/drivers/devfreq/rk3399_dmc.c
> +++ b/drivers/devfreq/rk3399_dmc.c
> @@ -22,6 +22,7 @@
>  #include <linux/suspend.h>
>  
>  #include <soc/rockchip/pm_domains.h>
> +#include <soc/rockchip/rockchip_grf.h>
>  #include <soc/rockchip/rk3399_grf.h>
>  #include <soc/rockchip/rockchip_sip.h>
>  
> @@ -381,17 +382,16 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev)
>  	}
>  
>  	regmap_read(data->regmap_pmu, RK3399_PMUGRF_OS_REG2, &val);
> -	ddr_type = (val >> RK3399_PMUGRF_DDRTYPE_SHIFT) &
> -		    RK3399_PMUGRF_DDRTYPE_MASK;
> +	ddr_type = FIELD_GET(RK3399_PMUGRF_OS_REG2_DDRTYPE, val);

Excellent!  You did it a few patches later :)

>  
>  	switch (ddr_type) {
> -	case RK3399_PMUGRF_DDRTYPE_DDR3:
> +	case ROCKCHIP_DDRTYPE_DDR3:
>  		data->odt_dis_freq = data->ddr3_odt_dis_freq;
>  		break;
> -	case RK3399_PMUGRF_DDRTYPE_LPDDR3:
> +	case ROCKCHIP_DDRTYPE_LPDDR3:
>  		data->odt_dis_freq = data->lpddr3_odt_dis_freq;
>  		break;
> -	case RK3399_PMUGRF_DDRTYPE_LPDDR4:
> +	case ROCKCHIP_DDRTYPE_LPDDR4:
>  		data->odt_dis_freq = data->lpddr4_odt_dis_freq;
>  		break;
>  	default:
> diff --git a/include/soc/rockchip/rk3399_grf.h b/include/soc/rockchip/rk3399_grf.h
> index 3eebabcb28123..775f8444bea8d 100644
> --- a/include/soc/rockchip/rk3399_grf.h
> +++ b/include/soc/rockchip/rk3399_grf.h
> @@ -11,11 +11,6 @@
>  
>  /* PMU GRF Registers */
>  #define RK3399_PMUGRF_OS_REG2		0x308
> -#define RK3399_PMUGRF_DDRTYPE_SHIFT	13
> -#define RK3399_PMUGRF_DDRTYPE_MASK	7
> -#define RK3399_PMUGRF_DDRTYPE_DDR3	3
> -#define RK3399_PMUGRF_DDRTYPE_LPDDR2	5
> -#define RK3399_PMUGRF_DDRTYPE_LPDDR3	6
> -#define RK3399_PMUGRF_DDRTYPE_LPDDR4	7
> +#define RK3399_PMUGRF_OS_REG2_DDRTYPE		GENMASK(15, 13)
>  
>  #endif
> diff --git a/include/soc/rockchip/rockchip_grf.h b/include/soc/rockchip/rockchip_grf.h
> new file mode 100644
> index 0000000000000..dc77bb762a05a
> --- /dev/null
> +++ b/include/soc/rockchip/rockchip_grf.h
> @@ -0,0 +1,15 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */
> +/*
> + * Rockchip General Register Files definitions
> + */
> +
> +#ifndef __SOC_ROCKCHIP_GRF_H
> +#define __SOC_ROCKCHIP_GRF_H
> +
> +/* Rockchip DDRTYPE defines */
> +#define ROCKCHIP_DDRTYPE_DDR3	3
> +#define ROCKCHIP_DDRTYPE_LPDDR2	5
> +#define ROCKCHIP_DDRTYPE_LPDDR3	6
> +#define ROCKCHIP_DDRTYPE_LPDDR4	7

Maybe worth an enum so you can give ddr_type a named type and
the compiler can see if you've handled all the cases for
the switch statements?

> +
> +#endif /* __SOC_ROCKCHIP_GRF_H */
Sascha Hauer May 17, 2023, 10:51 a.m. UTC | #2 
On Tue, May 16, 2023 at 04:54:55PM +0100, Jonathan Cameron wrote:
> On Fri,  5 May 2023 13:38:43 +0200
> Sascha Hauer <s.hauer@pengutronix.de> wrote:
> 
> > The DDRTYPE defines are named to be RK3399 specific, but they can be
> > used for other Rockchip SoCs as well, so replace the RK3399_PMUGRF_
> > prefix with ROCKCHIP_. They are defined in a SoC specific header
> > file, so when generalizing the prefix also move the new defines to
> > a SoC agnostic header file. While at it use GENMASK to define the
> > DDRTYPE bitfield and give it a name including the full register name.
> 
> Great - you covered this one a few patches later.
> 
> A few suggestions inline but this looks basically fine to me.
> > 
> > Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> > ---
> >  drivers/devfreq/event/rockchip-dfi.c | 10 ++++++----
> >  drivers/devfreq/rk3399_dmc.c         | 10 +++++-----
> >  include/soc/rockchip/rk3399_grf.h    |  7 +------
> >  include/soc/rockchip/rockchip_grf.h  | 15 +++++++++++++++
> >  4 files changed, 27 insertions(+), 15 deletions(-)
> >  create mode 100644 include/soc/rockchip/rockchip_grf.h
> > 
> > diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c
> > index 18d578730fd0c..7896cd8beb143 100644
> > --- a/drivers/devfreq/event/rockchip-dfi.c
> > +++ b/drivers/devfreq/event/rockchip-dfi.c
> > @@ -18,7 +18,10 @@
> >  #include <linux/list.h>
> >  #include <linux/of.h>
> >  #include <linux/of_device.h>
> > +#include <linux/bitfield.h>
> > +#include <linux/bits.h>
> 
> Why bits.h?

For GENMASK.

It's included indirectly anyway, but being explicit shouldn't hurt.

> 
> >  
> > +#include <soc/rockchip/rockchip_grf.h>
> >  #include <soc/rockchip/rk3399_grf.h>
> >  
> >  #define DMC_MAX_CHANNELS	2
> > @@ -74,9 +77,9 @@ static void rockchip_dfi_start_hardware_counter(struct devfreq_event_dev *edev)
> >  	writel_relaxed(CLR_DDRMON_CTRL, dfi_regs + DDRMON_CTRL);
> >  
> >  	/* set ddr type to dfi */
> > -	if (dfi->ddr_type == RK3399_PMUGRF_DDRTYPE_LPDDR3)
> > +	if (dfi->ddr_type == ROCKCHIP_DDRTYPE_LPDDR3)
> >  		writel_relaxed(LPDDR3_EN, dfi_regs + DDRMON_CTRL);
> > -	else if (dfi->ddr_type == RK3399_PMUGRF_DDRTYPE_LPDDR4)
> > +	else if (dfi->ddr_type == ROCKCHIP_DDRTYPE_LPDDR4)
> >  		writel_relaxed(LPDDR4_EN, dfi_regs + DDRMON_CTRL);
> 
> Maybe a switch statement here as well?  In particular I'm interested
> that there is no sign of DDR3 or LPDDR2 here and I think it would be good to
> make that explicit given it's defined.

That's done later in this series, but you already noticed that.

> > diff --git a/include/soc/rockchip/rockchip_grf.h b/include/soc/rockchip/rockchip_grf.h
> > new file mode 100644
> > index 0000000000000..dc77bb762a05a
> > --- /dev/null
> > +++ b/include/soc/rockchip/rockchip_grf.h
> > @@ -0,0 +1,15 @@
> > +/* SPDX-License-Identifier: GPL-2.0+ */
> > +/*
> > + * Rockchip General Register Files definitions
> > + */
> > +
> > +#ifndef __SOC_ROCKCHIP_GRF_H
> > +#define __SOC_ROCKCHIP_GRF_H
> > +
> > +/* Rockchip DDRTYPE defines */
> > +#define ROCKCHIP_DDRTYPE_DDR3	3
> > +#define ROCKCHIP_DDRTYPE_LPDDR2	5
> > +#define ROCKCHIP_DDRTYPE_LPDDR3	6
> > +#define ROCKCHIP_DDRTYPE_LPDDR4	7
> 
> Maybe worth an enum so you can give ddr_type a named type and
> the compiler can see if you've handled all the cases for
> the switch statements?

Ok, will do.

Sascha
diff mbox series

Patch

diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c
index 18d578730fd0c..7896cd8beb143 100644
--- a/drivers/devfreq/event/rockchip-dfi.c
+++ b/drivers/devfreq/event/rockchip-dfi.c
@@ -18,7 +18,10 @@ 
 #include <linux/list.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/bitfield.h>
+#include <linux/bits.h>
 
+#include <soc/rockchip/rockchip_grf.h>
 #include <soc/rockchip/rk3399_grf.h>
 
 #define DMC_MAX_CHANNELS	2
@@ -74,9 +77,9 @@  static void rockchip_dfi_start_hardware_counter(struct devfreq_event_dev *edev)
 	writel_relaxed(CLR_DDRMON_CTRL, dfi_regs + DDRMON_CTRL);
 
 	/* set ddr type to dfi */
-	if (dfi->ddr_type == RK3399_PMUGRF_DDRTYPE_LPDDR3)
+	if (dfi->ddr_type == ROCKCHIP_DDRTYPE_LPDDR3)
 		writel_relaxed(LPDDR3_EN, dfi_regs + DDRMON_CTRL);
-	else if (dfi->ddr_type == RK3399_PMUGRF_DDRTYPE_LPDDR4)
+	else if (dfi->ddr_type == ROCKCHIP_DDRTYPE_LPDDR4)
 		writel_relaxed(LPDDR4_EN, dfi_regs + DDRMON_CTRL);
 
 	/* enable count, use software mode */
@@ -191,8 +194,7 @@  static int rk3399_dfi_init(struct rockchip_dfi *dfi)
 
 	/* get ddr type */
 	regmap_read(regmap_pmu, RK3399_PMUGRF_OS_REG2, &val);
-	dfi->ddr_type = (val >> RK3399_PMUGRF_DDRTYPE_SHIFT) &
-			RK3399_PMUGRF_DDRTYPE_MASK;
+	dfi->ddr_type = FIELD_GET(RK3399_PMUGRF_OS_REG2_DDRTYPE, val);
 
 	dfi->channel_mask = 3;
 
diff --git a/drivers/devfreq/rk3399_dmc.c b/drivers/devfreq/rk3399_dmc.c
index daff407026157..fd2c5ffedf41e 100644
--- a/drivers/devfreq/rk3399_dmc.c
+++ b/drivers/devfreq/rk3399_dmc.c
@@ -22,6 +22,7 @@ 
 #include <linux/suspend.h>
 
 #include <soc/rockchip/pm_domains.h>
+#include <soc/rockchip/rockchip_grf.h>
 #include <soc/rockchip/rk3399_grf.h>
 #include <soc/rockchip/rockchip_sip.h>
 
@@ -381,17 +382,16 @@  static int rk3399_dmcfreq_probe(struct platform_device *pdev)
 	}
 
 	regmap_read(data->regmap_pmu, RK3399_PMUGRF_OS_REG2, &val);
-	ddr_type = (val >> RK3399_PMUGRF_DDRTYPE_SHIFT) &
-		    RK3399_PMUGRF_DDRTYPE_MASK;
+	ddr_type = FIELD_GET(RK3399_PMUGRF_OS_REG2_DDRTYPE, val);
 
 	switch (ddr_type) {
-	case RK3399_PMUGRF_DDRTYPE_DDR3:
+	case ROCKCHIP_DDRTYPE_DDR3:
 		data->odt_dis_freq = data->ddr3_odt_dis_freq;
 		break;
-	case RK3399_PMUGRF_DDRTYPE_LPDDR3:
+	case ROCKCHIP_DDRTYPE_LPDDR3:
 		data->odt_dis_freq = data->lpddr3_odt_dis_freq;
 		break;
-	case RK3399_PMUGRF_DDRTYPE_LPDDR4:
+	case ROCKCHIP_DDRTYPE_LPDDR4:
 		data->odt_dis_freq = data->lpddr4_odt_dis_freq;
 		break;
 	default:
diff --git a/include/soc/rockchip/rk3399_grf.h b/include/soc/rockchip/rk3399_grf.h
index 3eebabcb28123..775f8444bea8d 100644
--- a/include/soc/rockchip/rk3399_grf.h
+++ b/include/soc/rockchip/rk3399_grf.h
@@ -11,11 +11,6 @@ 
 
 /* PMU GRF Registers */
 #define RK3399_PMUGRF_OS_REG2		0x308
-#define RK3399_PMUGRF_DDRTYPE_SHIFT	13
-#define RK3399_PMUGRF_DDRTYPE_MASK	7
-#define RK3399_PMUGRF_DDRTYPE_DDR3	3
-#define RK3399_PMUGRF_DDRTYPE_LPDDR2	5
-#define RK3399_PMUGRF_DDRTYPE_LPDDR3	6
-#define RK3399_PMUGRF_DDRTYPE_LPDDR4	7
+#define RK3399_PMUGRF_OS_REG2_DDRTYPE		GENMASK(15, 13)
 
 #endif
diff --git a/include/soc/rockchip/rockchip_grf.h b/include/soc/rockchip/rockchip_grf.h
new file mode 100644
index 0000000000000..dc77bb762a05a
--- /dev/null
+++ b/include/soc/rockchip/rockchip_grf.h
@@ -0,0 +1,15 @@ 
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Rockchip General Register Files definitions
+ */
+
+#ifndef __SOC_ROCKCHIP_GRF_H
+#define __SOC_ROCKCHIP_GRF_H
+
+/* Rockchip DDRTYPE defines */
+#define ROCKCHIP_DDRTYPE_DDR3	3
+#define ROCKCHIP_DDRTYPE_LPDDR2	5
+#define ROCKCHIP_DDRTYPE_LPDDR3	6
+#define ROCKCHIP_DDRTYPE_LPDDR4	7
+
+#endif /* __SOC_ROCKCHIP_GRF_H */