Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
soc: mediatek: mtk-dvfsrc: Write bandwidth to EMI DDR if present
In preparation for adding support for DVFSRC Version 4, add a new
`has_emi_ddr` member to struct dvfsrc_soc_data: if true, write the
DRAM bandwidth both to the BW_AVG and to the newly defined EMI_BW
register, present only on DVFSRC v4.
Currently supported SoCs will not use this, as has_emi_ddr is left
out from their platform data, hence reading false.
Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
+5
+5
drivers/soc/mediatek/mtk-dvfsrc.c
+5
drivers/soc/mediatek/mtk-dvfsrc.c
···
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struct dvfsrc_soc_data {
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const int *regs;
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+
const bool has_emi_ddr;
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const struct dvfsrc_opp_desc *opps_desc;
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u32 (*calc_dram_bw)(struct mtk_dvfsrc *dvfsrc, int type, u64 bw);
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u32 (*get_target_level)(struct mtk_dvfsrc *dvfsrc);
···
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DVFSRC_SW_BW,
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DVFSRC_SW_PEAK_BW,
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DVFSRC_SW_HRT_BW,
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+
DVFSRC_SW_EMI_BW,
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DVFSRC_VCORE,
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DVFSRC_REGS_MAX,
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};
···
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new_bw = max(new_bw, min_bw);
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dvfsrc_writel(dvfsrc, reg, new_bw);
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+
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+
if (type == DVFSRC_BW_AVG && dvfsrc->dvd->has_emi_ddr)
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+
dvfsrc_writel(dvfsrc, DVFSRC_SW_EMI_BW, bw);
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}
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static void dvfsrc_set_dram_bw_v1(struct mtk_dvfsrc *dvfsrc, u64 bw)