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Date:   Wed, 18 Oct 2023 09:08:29 +0200
From:   Sascha Hauer <s.hauer@pengutronix.de>
To:     Heiko Stuebner <heiko@sntech.de>
Cc:     linux-rockchip@lists.infradead.org,
        Mark Rutland <mark.rutland@arm.com>,
        devicetree@vger.kernel.org, Conor Dooley <conor+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        linux-pm@vger.kernel.org, Robin Murphy <robin.murphy@arm.com>,
        linux-kernel@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
        Sebastian Reichel <sebastian.reichel@collabora.com>,
        Chanwoo Choi <cw00.choi@samsung.com>,
        Kyungmin Park <kyungmin.park@samsung.com>,
        MyungJoo Ham <myungjoo.ham@samsung.com>,
        Michael Riesch <michael.riesch@wolfvision.net>,
        Chanwoo Choi <chanwoo@kernel.org>,
        Vincent Legoll <vincent.legoll@gmail.com>,
        Will Deacon <will@kernel.org>, kernel@pengutronix.de,
        linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v8 08/26] PM / devfreq: rk3399_dmc, dfi: generalize
 DDRTYPE defines
Message-ID: <20231018070829.GH3359458@pengutronix.de>
References: <20231018061714.3553817-1-s.hauer@pengutronix.de>
 <20231018061714.3553817-9-s.hauer@pengutronix.de>
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Heiko,

Could you provide your Ack for this patch?

Thanks
 Sascha

On Wed, Oct 18, 2023 at 08:16:56AM +0200, Sascha Hauer 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.
> 
> Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
> Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> ---
>  drivers/devfreq/event/rockchip-dfi.c |  9 +++++----
>  drivers/devfreq/rk3399_dmc.c         | 10 +++++-----
>  include/soc/rockchip/rk3399_grf.h    |  7 +------
>  include/soc/rockchip/rockchip_grf.h  | 17 +++++++++++++++++
>  4 files changed, 28 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 28c18bbf6baa5..82d18c60538a5 100644
> --- a/drivers/devfreq/event/rockchip-dfi.c
> +++ b/drivers/devfreq/event/rockchip-dfi.c
> @@ -18,8 +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
> @@ -75,9 +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 */
> @@ -192,8 +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 = GENMASK(1, 0);
>  	dfi->max_channels = 2;
> 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..dde1a9796ccb5
> --- /dev/null
> +++ b/include/soc/rockchip/rockchip_grf.h
> @@ -0,0 +1,17 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */
> +/*
> + * Rockchip General Register Files definitions
> + */
> +
> +#ifndef __SOC_ROCKCHIP_GRF_H
> +#define __SOC_ROCKCHIP_GRF_H
> +
> +/* Rockchip DDRTYPE defines */
> +enum {
> +	ROCKCHIP_DDRTYPE_DDR3	= 3,
> +	ROCKCHIP_DDRTYPE_LPDDR2	= 5,
> +	ROCKCHIP_DDRTYPE_LPDDR3	= 6,
> +	ROCKCHIP_DDRTYPE_LPDDR4	= 7,
> +};
> +
> +#endif /* __SOC_ROCKCHIP_GRF_H */
> -- 
> 2.39.2
> 
> 
> 

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