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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
PM / devfreq: rockchip-dfi: Add RK3568 support
This adds RK3568 support to the DFI driver. Only iniitialization
differs from the currently supported RK3399.
Link: https://lore.kernel.org/all/20231018061714.3553817-11-s.hauer@pengutronix.de/
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
authored by
Sascha Hauer
and committed by
Chanwoo Choi
076b0597
d3b0f6ab
+39
+27
drivers/devfreq/event/rockchip-dfi.c
+27
drivers/devfreq/event/rockchip-dfi.c
···
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#include <soc/rockchip/rockchip_grf.h>
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#include <soc/rockchip/rk3399_grf.h>
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#include <soc/rockchip/rk3568_grf.h>
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#define DMC_MAX_CHANNELS 2
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···
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return 0;
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};
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static int rk3568_dfi_init(struct rockchip_dfi *dfi)
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{
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struct regmap *regmap_pmu = dfi->regmap_pmu;
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u32 reg2, reg3;
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regmap_read(regmap_pmu, RK3568_PMUGRF_OS_REG2, ®2);
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regmap_read(regmap_pmu, RK3568_PMUGRF_OS_REG3, ®3);
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/* lower 3 bits of the DDR type */
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dfi->ddr_type = FIELD_GET(RK3568_PMUGRF_OS_REG2_DRAMTYPE_INFO, reg2);
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/*
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* For version three and higher the upper two bits of the DDR type are
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* in RK3568_PMUGRF_OS_REG3
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*/
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if (FIELD_GET(RK3568_PMUGRF_OS_REG3_SYSREG_VERSION, reg3) >= 0x3)
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dfi->ddr_type |= FIELD_GET(RK3568_PMUGRF_OS_REG3_DRAMTYPE_INFO_V3, reg3) << 3;
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dfi->channel_mask = BIT(0);
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dfi->max_channels = 1;
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return 0;
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};
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static const struct of_device_id rockchip_dfi_id_match[] = {
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{ .compatible = "rockchip,rk3399-dfi", .data = rk3399_dfi_init },
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{ .compatible = "rockchip,rk3568-dfi", .data = rk3568_dfi_init },
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{ },
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};
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MODULE_DEVICE_TABLE(of, rockchip_dfi_id_match);
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static int rockchip_dfi_probe(struct platform_device *pdev)
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include/soc/rockchip/rk3568_grf.h
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include/soc/rockchip/rk3568_grf.h
···
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/* SPDX-License-Identifier: GPL-2.0+ */
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#ifndef __SOC_RK3568_GRF_H
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#define __SOC_RK3568_GRF_H
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#define RK3568_PMUGRF_OS_REG2 0x208
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#define RK3568_PMUGRF_OS_REG2_DRAMTYPE_INFO GENMASK(15, 13)
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#define RK3568_PMUGRF_OS_REG3 0x20c
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#define RK3568_PMUGRF_OS_REG3_DRAMTYPE_INFO_V3 GENMASK(13, 12)
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#define RK3568_PMUGRF_OS_REG3_SYSREG_VERSION GENMASK(31, 28)
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#endif /* __SOC_RK3568_GRF_H */