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Message-ID: <0c83d9ee-ee31-4b8e-b635-f929fda27f20@kernel.org>
Date: Thu, 19 Oct 2023 00:05:58 +0900
From: Chanwoo Choi <chanwoo@...nel.org>
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>,
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
On 23. 10. 18. 15:16, Sascha Hauer wrote:
> 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, ®2);
> + regmap_read(regmap_pmu, RK3568_PMUGRF_OS_REG3, ®3);
> +
> + /* 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 */
Acked-by: Chanwoo Choi <cw00.choi@...sung.com>
--
Best Regards,
Samsung Electronics
Chanwoo Choi
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