linux-kernel - RE: [PATCH v8 10/26] PM / devfreq: rockchip-dfi: Add RK3568 support

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Message-ID: <001101da0281$dd10bf70$97323e50$@samsung.com>
Date:   Thu, 19 Oct 2023 20:46:14 +0900
From:   "Chanwoo Choi" <cw00.choi@...sung.com>
To:     "'Sascha Hauer'" <s.hauer@...gutronix.de>,
        <linux-rockchip@...ts.infradead.org>
Cc:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-pm@...r.kernel.org>,
        "'Heiko Stuebner'" <heiko@...ech.de>,
        "'Chanwoo Choi'" <chanwoo@...nel.org>,
        "'Kyungmin Park'" <kyungmin.park@...sung.com>,
        "'MyungJoo Ham'" <myungjoo.ham@...sung.com>,
        "'Will Deacon'" <will@...nel.org>,
        "'Mark Rutland'" <mark.rutland@....com>, <kernel@...gutronix.de>,
        "'Michael Riesch'" <michael.riesch@...fvision.net>,
        "'Robin Murphy'" <robin.murphy@....com>,
        "'Vincent Legoll'" <vincent.legoll@...il.com>,
        "'Rob Herring'" <robh+dt@...nel.org>,
        "'Krzysztof Kozlowski'" <krzysztof.kozlowski+dt@...aro.org>,
        "'Conor Dooley'" <conor+dt@...nel.org>,
        <devicetree@...r.kernel.org>,
        "'Sebastian Reichel'" <sebastian.reichel@...labora.com>
Subject: RE: [PATCH v8 10/26] PM / devfreq: rockchip-dfi: Add RK3568 support



> -----Original Message-----
> From: Sascha Hauer <s.hauer@...gutronix.de>
> Sent: Wednesday, October 18, 2023 3:17 PM
> To: linux-rockchip@...ts.infradead.org
> Cc: linux-arm-kernel@...ts.infradead.org; linux-kernel@...r.kernel.org;
> linux-pm@...r.kernel.org; Heiko Stuebner <heiko@...ech.de>; Chanwoo Choi
> <chanwoo@...nel.org>; Kyungmin Park <kyungmin.park@...sung.com>; MyungJoo
> Ham <myungjoo.ham@...sung.com>; Will Deacon <will@...nel.org>; Mark
> Rutland <mark.rutland@....com>; kernel@...gutronix.de; Michael Riesch
> <michael.riesch@...fvision.net>; Robin Murphy <robin.murphy@....com>;
> Vincent Legoll <vincent.legoll@...il.com>; Rob Herring
> <robh+dt@...nel.org>; Krzysztof Kozlowski
> <krzysztof.kozlowski+dt@...aro.org>; Conor Dooley <conor+dt@...nel.org>;
> devicetree@...r.kernel.org; Sebastian Reichel
> <sebastian.reichel@...labora.com>; Sascha Hauer <s.hauer@...gutronix.de>
> Subject: [PATCH v8 10/26] PM / devfreq: rockchip-dfi: Add RK3568 support
> 
> This adds RK3568 support to the DFI driver.  Only iniitialization differs
> from the currently supported RK3399.
> 
> Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
> ---
> 
> Notes:
>     Changes since v7:
>      - Add comment to explain << 3
> 
>  drivers/devfreq/event/rockchip-dfi.c | 27 +++++++++++++++++++++++++++
>  include/soc/rockchip/rk3568_grf.h    | 12 ++++++++++++
>  2 files changed, 39 insertions(+)
>  create mode 100644 include/soc/rockchip/rk3568_grf.h
> 
> diff --git a/drivers/devfreq/event/rockchip-dfi.c
> b/drivers/devfreq/event/rockchip-dfi.c
> index 12f9096879235..571d72d1abd1c 100644
> --- a/drivers/devfreq/event/rockchip-dfi.c
> +++ b/drivers/devfreq/event/rockchip-dfi.c
> @@ -23,6 +23,7 @@
> 
>  #include <soc/rockchip/rockchip_grf.h>
>  #include <soc/rockchip/rk3399_grf.h>
> +#include <soc/rockchip/rk3568_grf.h>
> 
>  #define DMC_MAX_CHANNELS	2
> 
> @@ -211,10 +212,36 @@ static int rk3399_dfi_init(struct rockchip_dfi *dfi)
>  	return 0;
>  };
> 
> +static int rk3568_dfi_init(struct rockchip_dfi *dfi) {
> +	struct regmap *regmap_pmu = dfi->regmap_pmu;
> +	u32 reg2, reg3;
> +
> +	regmap_read(regmap_pmu, RK3568_PMUGRF_OS_REG2, &reg2);
> +	regmap_read(regmap_pmu, RK3568_PMUGRF_OS_REG3, &reg3);
> +
> +	/* lower 3 bits of the DDR type */
> +	dfi->ddr_type = FIELD_GET(RK3568_PMUGRF_OS_REG2_DRAMTYPE_INFO,
> reg2);
> +
> +	/*
> +	 * For version three and higher the upper two bits of the DDR type
> are
> +	 * in RK3568_PMUGRF_OS_REG3
> +	 */
> +	if (FIELD_GET(RK3568_PMUGRF_OS_REG3_SYSREG_VERSION, reg3) >= 0x3)
> +		dfi->ddr_type |=
> FIELD_GET(RK3568_PMUGRF_OS_REG3_DRAMTYPE_INFO_V3,
> +reg3) << 3;
> +
> +	dfi->channel_mask = BIT(0);
> +	dfi->max_channels = 1;
> +
> +	return 0;
> +};
> +
>  static const struct of_device_id rockchip_dfi_id_match[] = {
>  	{ .compatible = "rockchip,rk3399-dfi", .data = rk3399_dfi_init },
> +	{ .compatible = "rockchip,rk3568-dfi", .data = rk3568_dfi_init },
>  	{ },
>  };
> +
>  MODULE_DEVICE_TABLE(of, rockchip_dfi_id_match);
> 
>  static int rockchip_dfi_probe(struct platform_device *pdev) diff --git
> a/include/soc/rockchip/rk3568_grf.h b/include/soc/rockchip/rk3568_grf.h
> new file mode 100644
> index 0000000000000..575584e9d8834
> --- /dev/null
> +++ b/include/soc/rockchip/rk3568_grf.h
> @@ -0,0 +1,12 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */ #ifndef __SOC_RK3568_GRF_H
> +#define __SOC_RK3568_GRF_H
> +
> +#define RK3568_PMUGRF_OS_REG2		0x208
> +#define RK3568_PMUGRF_OS_REG2_DRAMTYPE_INFO		GENMASK(15, 13)
> +
> +#define RK3568_PMUGRF_OS_REG3		0x20c
> +#define RK3568_PMUGRF_OS_REG3_DRAMTYPE_INFO_V3		GENMASK(13,
12)
> +#define RK3568_PMUGRF_OS_REG3_SYSREG_VERSION		GENMASK(31, 28)
> +
> +#endif /* __SOC_RK3568_GRF_H */
> --
> 2.39.2



Applied it. Thanks

Best Regards,
Chanwoo Choi