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Message-ID: <c476cc48-17ec-4e14-98d8-35bdffb5d296@collabora.com>
Date: Tue, 16 Jan 2024 11:28:29 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: "yu-chang.lee" <yu-chang.lee@...iatek.com>
Cc: Ulf Hansson <ulf.hansson@...aro.org>,
Matthias Brugger <matthias.bgg@...il.com>, linux-pm@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, fparent@...libre.com,
Ben Lok <ben.lok@...iatek.com>, Chris-qj Chen <Chris-qj.Chen@...iatek.com>,
Louis Yu <louis.yu@...iatek.com>, Bear Wang <bear.wang@...iatek.com>,
MandyJH Liu <MandyJH.Liu@...iatek.com>, Fan Chen <fan.chen@...iatek.com>,
Xiufeng Li <Xiufeng.Li@...iatek.com>, abailon@...libre.com,
amergnat@...libre.com, afgros@...libre.com, msp@...libre.com
Subject: Re: [PATCH 1/1] soc: mediatek: pm-domains: support clamp protection
Il 15/01/24 12:18, yu-chang.lee ha scritto:
> This patch mainly do two things
> 1. Add smi clamp protection support
> 2. Force order of bus protection between infra and smi
>
> For example: power on
> "clamp protection enable" (smi, with clamp flag)
> -> regulator enable
> ...
> -> clamp protection disaled (smi, with clamp flag)
> -> bus protection disabled (smi -> infra)
>
> For example: power off
> "clamp protection enable" (smi, with clamp flag)
> -> bus protection enable (infra -> smi)
>
> Signed-off-by: yu-chang.lee <yu-chang.lee@...iatek.com>
> ---
> drivers/pmdomain/mediatek/mt8183-pm-domains.h | 52 ++++---
> drivers/pmdomain/mediatek/mt8188-pm-domains.h | 41 +++++-
> drivers/pmdomain/mediatek/mt8365-pm-domains.h | 12 +-
> drivers/pmdomain/mediatek/mtk-pm-domains.c | 132 +++++++++++++++---
> drivers/pmdomain/mediatek/mtk-pm-domains.h | 2 +
> 5 files changed, 189 insertions(+), 50 deletions(-)
>
> diff --git a/drivers/pmdomain/mediatek/mt8183-pm-domains.h b/drivers/pmdomain/mediatek/mt8183-pm-domains.h
> index c4c1b63d85b1..04fca4a1e8f3 100644
> --- a/drivers/pmdomain/mediatek/mt8183-pm-domains.h
> +++ b/drivers/pmdomain/mediatek/mt8183-pm-domains.h
> @@ -103,6 +103,13 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8183[] = {
> .pwr_sta2nd_offs = 0x0184,
> .sram_pdn_bits = GENMASK(8, 8),
> .sram_pdn_ack_bits = GENMASK(12, 12),
> + .clamp_smi = {
> + BUS_PROT_WR(SMI,
> + MT8183_SMI_COMMON_SMI_CLAMP_DISP,
> + MT8183_SMI_COMMON_CLAMP_EN_SET,
> + MT8183_SMI_COMMON_CLAMP_EN_CLR,
> + MT8183_SMI_COMMON_CLAMP_EN),
> + },
> .bp_cfg = {
> BUS_PROT_WR(INFRA,
> MT8183_TOP_AXI_PROT_EN_1_DISP,
> @@ -114,11 +121,6 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8183[] = {
> MT8183_TOP_AXI_PROT_EN_SET,
> MT8183_TOP_AXI_PROT_EN_CLR,
> MT8183_TOP_AXI_PROT_EN_STA1),
> - BUS_PROT_WR(SMI,
> - MT8183_SMI_COMMON_SMI_CLAMP_DISP,
> - MT8183_SMI_COMMON_CLAMP_EN_SET,
> - MT8183_SMI_COMMON_CLAMP_EN_CLR,
> - MT8183_SMI_COMMON_CLAMP_EN),
> },
> },
> [MT8183_POWER_DOMAIN_CAM] = {
> @@ -129,6 +131,13 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8183[] = {
> .pwr_sta2nd_offs = 0x0184,
> .sram_pdn_bits = GENMASK(9, 8),
> .sram_pdn_ack_bits = GENMASK(13, 12),
> + .clamp_smi = {
> + BUS_PROT_WR(SMI,
> + MT8183_SMI_COMMON_SMI_CLAMP_CAM,
> + MT8183_SMI_COMMON_CLAMP_EN_SET,
> + MT8183_SMI_COMMON_CLAMP_EN_CLR,
> + MT8183_SMI_COMMON_CLAMP_EN),
> + },
> .bp_cfg = {
> BUS_PROT_WR(INFRA,
> MT8183_TOP_AXI_PROT_EN_MM_CAM,
> @@ -145,11 +154,6 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8183[] = {
> MT8183_TOP_AXI_PROT_EN_MM_SET,
> MT8183_TOP_AXI_PROT_EN_MM_CLR,
> MT8183_TOP_AXI_PROT_EN_MM_STA1),
> - BUS_PROT_WR(SMI,
> - MT8183_SMI_COMMON_SMI_CLAMP_CAM,
> - MT8183_SMI_COMMON_CLAMP_EN_SET,
> - MT8183_SMI_COMMON_CLAMP_EN_CLR,
> - MT8183_SMI_COMMON_CLAMP_EN),
> },
> },
> [MT8183_POWER_DOMAIN_ISP] = {
> @@ -160,6 +164,13 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8183[] = {
> .pwr_sta2nd_offs = 0x0184,
> .sram_pdn_bits = GENMASK(9, 8),
> .sram_pdn_ack_bits = GENMASK(13, 12),
> + .clamp_smi = {
> + BUS_PROT_WR(SMI,
> + MT8183_SMI_COMMON_SMI_CLAMP_ISP,
> + MT8183_SMI_COMMON_CLAMP_EN_SET,
> + MT8183_SMI_COMMON_CLAMP_EN_CLR,
> + MT8183_SMI_COMMON_CLAMP_EN),
> + },
> .bp_cfg = {
> BUS_PROT_WR(INFRA,
> MT8183_TOP_AXI_PROT_EN_MM_ISP,
> @@ -171,11 +182,6 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8183[] = {
> MT8183_TOP_AXI_PROT_EN_MM_SET,
> MT8183_TOP_AXI_PROT_EN_MM_CLR,
> MT8183_TOP_AXI_PROT_EN_MM_STA1),
> - BUS_PROT_WR(SMI,
> - MT8183_SMI_COMMON_SMI_CLAMP_ISP,
> - MT8183_SMI_COMMON_CLAMP_EN_SET,
> - MT8183_SMI_COMMON_CLAMP_EN_CLR,
> - MT8183_SMI_COMMON_CLAMP_EN),
> },
> },
> [MT8183_POWER_DOMAIN_VDEC] = {
> @@ -186,7 +192,7 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8183[] = {
> .pwr_sta2nd_offs = 0x0184,
> .sram_pdn_bits = GENMASK(8, 8),
> .sram_pdn_ack_bits = GENMASK(12, 12),
> - .bp_cfg = {
> + .clamp_smi = {
> BUS_PROT_WR(SMI,
> MT8183_SMI_COMMON_SMI_CLAMP_VDEC,
> MT8183_SMI_COMMON_CLAMP_EN_SET,
> @@ -202,7 +208,7 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8183[] = {
> .pwr_sta2nd_offs = 0x0184,
> .sram_pdn_bits = GENMASK(11, 8),
> .sram_pdn_ack_bits = GENMASK(15, 12),
> - .bp_cfg = {
> + .clamp_smi = {
> BUS_PROT_WR(SMI,
> MT8183_SMI_COMMON_SMI_CLAMP_VENC,
> MT8183_SMI_COMMON_CLAMP_EN_SET,
> @@ -218,6 +224,13 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8183[] = {
> .pwr_sta2nd_offs = 0x0184,
> .sram_pdn_bits = GENMASK(8, 8),
> .sram_pdn_ack_bits = GENMASK(12, 12),
> + .clamp_smi = {
> + BUS_PROT_WR(SMI,
> + MT8183_SMI_COMMON_SMI_CLAMP_VPU_TOP,
> + MT8183_SMI_COMMON_CLAMP_EN_SET,
> + MT8183_SMI_COMMON_CLAMP_EN_CLR,
> + MT8183_SMI_COMMON_CLAMP_EN),
> + },
> .bp_cfg = {
> BUS_PROT_WR(INFRA,
> MT8183_TOP_AXI_PROT_EN_MM_VPU_TOP,
> @@ -234,11 +247,6 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8183[] = {
> MT8183_TOP_AXI_PROT_EN_MM_SET,
> MT8183_TOP_AXI_PROT_EN_MM_CLR,
> MT8183_TOP_AXI_PROT_EN_MM_STA1),
> - BUS_PROT_WR(SMI,
> - MT8183_SMI_COMMON_SMI_CLAMP_VPU_TOP,
> - MT8183_SMI_COMMON_CLAMP_EN_SET,
> - MT8183_SMI_COMMON_CLAMP_EN_CLR,
> - MT8183_SMI_COMMON_CLAMP_EN),
> },
> },
> [MT8183_POWER_DOMAIN_VPU_CORE0] = {
> diff --git a/drivers/pmdomain/mediatek/mt8188-pm-domains.h b/drivers/pmdomain/mediatek/mt8188-pm-domains.h
> index ade3c01149af..be2393c41f3e 100644
> --- a/drivers/pmdomain/mediatek/mt8188-pm-domains.h
> +++ b/drivers/pmdomain/mediatek/mt8188-pm-domains.h
> @@ -577,6 +577,18 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8188[] = {
> .pwr_sta2nd_offs = 0x170,
> .sram_pdn_bits = BIT(8),
> .sram_pdn_ack_bits = BIT(12),
> + .clamp_smi = {
> + BUS_PROT_WR(SMI,
> + MT8188_SMI_COMMON_SMI_CLAMP_DIP_TO_VDO0,
> + MT8188_SMI_COMMON_CLAMP_EN_SET,
> + MT8188_SMI_COMMON_CLAMP_EN_CLR,
> + MT8188_SMI_COMMON_CLAMP_EN_STA),
> + BUS_PROT_WR(SMI,
> + MT8188_SMI_COMMON_SMI_CLAMP_DIP_TO_VPP1,
> + MT8188_SMI_COMMON_CLAMP_EN_SET,
> + MT8188_SMI_COMMON_CLAMP_EN_CLR,
> + MT8188_SMI_COMMON_CLAMP_EN_STA),
> + },
> .reset_smi = {
> SMI_RESET_WR(MT8188_SMI_LARB10_RESET,
> MT8188_SMI_LARB10_RESET_ADDR),
> @@ -589,7 +601,7 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8188[] = {
> SMI_RESET_WR(MT8188_SMI_LARB15_RESET,
> MT8188_SMI_LARB15_RESET_ADDR),
> },
> - .caps = MTK_SCPD_KEEP_DEFAULT_OFF,
> + .caps = MTK_SCPD_KEEP_DEFAULT_OFF | MTK_SCPD_CLAMP_PROTECTION,
> },
> [MT8188_POWER_DOMAIN_IPE] = {
> .name = "ipe",
> @@ -599,11 +611,18 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8188[] = {
> .pwr_sta2nd_offs = 0x170,
> .sram_pdn_bits = BIT(8),
> .sram_pdn_ack_bits = BIT(12),
> + .clamp_smi = {
> + BUS_PROT_WR(SMI,
> + MT8188_SMI_COMMON_SMI_CLAMP_IPE_TO_VPP1,
> + MT8188_SMI_COMMON_CLAMP_EN_SET,
> + MT8188_SMI_COMMON_CLAMP_EN_CLR,
> + MT8188_SMI_COMMON_CLAMP_EN_STA),
> + },
> .reset_smi = {
> SMI_RESET_WR(MT8188_SMI_LARB12_RESET,
> MT8188_SMI_LARB12_RESET_ADDR),
> },
> - .caps = MTK_SCPD_KEEP_DEFAULT_OFF,
> + .caps = MTK_SCPD_KEEP_DEFAULT_OFF | MTK_SCPD_CLAMP_PROTECTION,
> },
> [MT8188_POWER_DOMAIN_CAM_VCORE] = {
> .name = "cam_vcore",
> @@ -682,13 +701,20 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8188[] = {
> .pwr_sta2nd_offs = 0x170,
> .sram_pdn_bits = BIT(8),
> .sram_pdn_ack_bits = BIT(12),
> + .clamp_smi = {
> + BUS_PROT_WR(SMI,
> + MT8188_SMI_COMMON_SMI_CLAMP_CAM_SUBA_TO_VPP0,
> + MT8188_SMI_COMMON_CLAMP_EN_SET,
> + MT8188_SMI_COMMON_CLAMP_EN_CLR,
> + MT8188_SMI_COMMON_CLAMP_EN_STA),
> + },
> .reset_smi = {
> SMI_RESET_WR(MT8188_SMI_LARB16A_RESET,
> MT8188_SMI_LARB16A_RESET_ADDR),
> SMI_RESET_WR(MT8188_SMI_LARB17A_RESET,
> MT8188_SMI_LARB17A_RESET_ADDR),
> },
> - .caps = MTK_SCPD_KEEP_DEFAULT_OFF,
> + .caps = MTK_SCPD_KEEP_DEFAULT_OFF | MTK_SCPD_CLAMP_PROTECTION,
> },
> [MT8188_POWER_DOMAIN_CAM_SUBB] = {
> .name = "cam_subb",
> @@ -698,13 +724,20 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8188[] = {
> .pwr_sta2nd_offs = 0x170,
> .sram_pdn_bits = BIT(8),
> .sram_pdn_ack_bits = BIT(12),
> + .clamp_smi = {
> + BUS_PROT_WR(SMI,
> + MT8188_SMI_COMMON_SMI_CLAMP_CAM_SUBB_TO_VDO0,
> + MT8188_SMI_COMMON_CLAMP_EN_SET,
> + MT8188_SMI_COMMON_CLAMP_EN_CLR,
> + MT8188_SMI_COMMON_CLAMP_EN_STA),
> + },
> .reset_smi = {
> SMI_RESET_WR(MT8188_SMI_LARB16B_RESET,
> MT8188_SMI_LARB16B_RESET_ADDR),
> SMI_RESET_WR(MT8188_SMI_LARB17B_RESET,
> MT8188_SMI_LARB17B_RESET_ADDR),
> },
> - .caps = MTK_SCPD_KEEP_DEFAULT_OFF,
> + .caps = MTK_SCPD_KEEP_DEFAULT_OFF | MTK_SCPD_CLAMP_PROTECTION,
> },
> };
>
> diff --git a/drivers/pmdomain/mediatek/mt8365-pm-domains.h b/drivers/pmdomain/mediatek/mt8365-pm-domains.h
> index 3d83d49eaa7c..f9813cdcd3aa 100644
> --- a/drivers/pmdomain/mediatek/mt8365-pm-domains.h
> +++ b/drivers/pmdomain/mediatek/mt8365-pm-domains.h
> @@ -76,7 +76,7 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8365[] = {
> .pwr_sta2nd_offs = 0x0184,
> .sram_pdn_bits = GENMASK(8, 8),
> .sram_pdn_ack_bits = GENMASK(12, 12),
> - .bp_cfg = {
> + .clamp_smi = {
> MT8365_BUS_PROT_SMI_WR_CLAMP_EN_PORT(1),
> },
> },
> @@ -138,10 +138,12 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8365[] = {
> .pwr_sta2nd_offs = 0x0184,
> .sram_pdn_bits = GENMASK(9, 8),
> .sram_pdn_ack_bits = GENMASK(13, 12),
> + .clamp_smi = {
> + MT8365_BUS_PROT_SMI_WR_CLAMP_EN_PORT(2),
> + },
> .bp_cfg = {
> MT8365_BUS_PROT_INFRA_WR_TOPAXI_1(
> MT8365_INFRA_TOPAXI_PROTECTEN_1_CAM2MM_AXI_GALS_MST),
> - MT8365_BUS_PROT_SMI_WR_CLAMP_EN_PORT(2),
> },
> },
> [MT8365_POWER_DOMAIN_VDEC] = {
> @@ -152,7 +154,7 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8365[] = {
> .pwr_sta2nd_offs = 0x0184,
> .sram_pdn_bits = GENMASK(8, 8),
> .sram_pdn_ack_bits = GENMASK(12, 12),
> - .bp_cfg = {
> + .clamp_smi = {
> MT8365_BUS_PROT_SMI_WR_CLAMP_EN_PORT(3),
> },
> },
> @@ -164,11 +166,13 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8365[] = {
> .pwr_sta2nd_offs = 0x0184,
> .sram_pdn_bits = GENMASK(14, 8),
> .sram_pdn_ack_bits = GENMASK(21, 15),
> + .clamp_smi = {
> + MT8365_BUS_PROT_SMI_WR_CLAMP_EN_PORT(4),
> + },
> .bp_cfg = {
> MT8365_BUS_PROT_INFRA_WR_TOPAXI_1(
> MT8365_INFRA_TOPAXI_PROTECTEN_1_APU2AP |
> MT8365_INFRA_TOPAXI_PROTECTEN_1_APU_CBIP_GALS_MST),
> - MT8365_BUS_PROT_SMI_WR_CLAMP_EN_PORT(4),
> },
> },
> [MT8365_POWER_DOMAIN_DSP] = {
> diff --git a/drivers/pmdomain/mediatek/mtk-pm-domains.c b/drivers/pmdomain/mediatek/mtk-pm-domains.c
> index 488920d29fbc..061296feb289 100644
> --- a/drivers/pmdomain/mediatek/mtk-pm-domains.c
> +++ b/drivers/pmdomain/mediatek/mtk-pm-domains.c
> @@ -47,9 +47,10 @@ struct scpsys_domain {
> struct clk_bulk_data *subsys_clks;
> struct regmap *infracfg_nao;
> struct regmap *infracfg;
> - struct regmap *smi;
> + struct regmap **smi;
> struct regmap **larb;
> int num_larb;
> + int num_smi;
> struct regulator *supply;
> };
>
> @@ -78,6 +79,71 @@ static bool scpsys_domain_is_on(struct scpsys_domain *pd)
> return status && status2;
> }
>
> +static int _scpsys_clamp_bus_protection_enable(const struct scpsys_bus_prot_data bpd,
> + struct regmap *regmap)
> +{
> + u32 val = 0, mask = bpd.bus_prot_sta_mask;
> +
> + if (!mask)
> + return 0;
> +
> + if (bpd.flags & BUS_PROT_REG_UPDATE)
> + regmap_set_bits(regmap, bpd.bus_prot_set, mask);
> + else
> + regmap_write(regmap, bpd.bus_prot_set, mask);
> +
> + return regmap_read_poll_timeout(regmap, bpd.bus_prot_sta,
> + val, (val & mask) == mask,
> + MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
> +}
This is practically a duplicated scpsys_bus_protect_set() function: it's doing the
exact same, with the addition of that zero mask check, which is done elsewhere for
the former anyway.
You can totally reuse scpsys_bus_protect_set() and scpsys_bus_protect_enable()
instead of introducing new functions, and you can even add SMI bus protections
to .bp_cfg if you do something like that:
static int scpsys_bus_protect_set(struct scpsys_domain *pd,
const struct scpsys_bus_prot_data *bpd,
struct regmap *regmap, struct regmap *sta_regmap)
{
struct regmap *sta_regmap = scpsys_bus_protect_get_sta_regmap(pd, bpd);
struct regmap *regmap = scpsys_bus_protect_get_regmap(pd, bpd);
u32 sta_mask = bpd->bus_prot_sta_mask;
u32 val;
if (bpd->flags & BUS_PROT_REG_UPDATE)
regmap_set_bits(regmap, bpd->bus_prot_set, bpd->bus_prot_set_clr_mask);
else
regmap_write(regmap, bpd->bus_prot_set, bpd->bus_prot_set_clr_mask);
return regmap_read_poll_timeout(sta_regmap, bpd->bus_prot_sta,
val, (val & sta_mask) == sta_mask,
MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
}
static int __scpsys_bus_protect_enable(struct scpsys_domain *pd, enum
scpsys_bus_prot_flags flags)
{
for (int i = 0; i < SPM_MAX_BUS_PROT_DATA; i++) {
const struct scpsys_bus_prot_data *bpd = &pd->data->bp_cfg[i];
int j, num_regmaps, ret;
bool is_smi = bpd->flags & BUS_PROT_COMPONENT_SMI;
if (!bpd->bus_prot_set_clr_mask)
break;
if (!(bpd->flags & flags))
continue;
num_regmaps = is_smi ? pd->num_smi : 1;
for (j = 0; j < num_regmaps; j++) {
struct regmap *sta_regmap, *regmap;
if (is_smi) {
sta_regmap = pd->smi[j];
regmap = pd->smi[j];
} else {
sta_regmap = scpsys_bus_protect_get_sta_regmap(pd, bpd);
regmap = scpsys_bus_protect_get_regmap(pd, bpd);
}
if (bpd->flags & BUS_PROT_INVERTED)
ret = scpsys_bus_protect_clear(pd, bpd, regmap, sta_regmap);
else
ret = scpsys_bus_protect_set(pd, bpd, regmap, sta_regmap);
if (ret)
return ret;
}
}
return 0;
}
static int scpsys_bus_protect_enable(struct scpsys_domain *pd)
{
int ret;
/* Enable bus protection and/or clamping on SMI first */
ret = __scpsys_bus_protect_enable(pd, BUS_PROT_COMPONENT_SMI);
if (ret)
return ret;
ret = __scpsys_bus_protect_enable(pd, BUS_PROT_COMPONENT_INFRA);
if (ret)
return ret;
return 0;
}
..and it's the same for the protection_disable part.
Regards,
Angelo
> +
> +static int scpsys_clamp_bus_protection_enable(struct scpsys_domain *pd)
> +{
> + int ret, i;
> +
> + for (i = 0; i < pd->num_smi; i++) {
> + ret = _scpsys_clamp_bus_protection_enable(pd->data->clamp_smi[i], pd->smi[i]);
> + if (ret)
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int _scpsys_clamp_bus_protection_disable(const struct scpsys_bus_prot_data bpd,
> + struct regmap *regmap)
> +{
> + u32 val = 0, mask = bpd.bus_prot_sta_mask;
> +
> + if (!mask)
> + return 0;
> +
> + if (bpd.flags & BUS_PROT_REG_UPDATE)
> + regmap_clear_bits(regmap, bpd.bus_prot_clr, mask);
> + else
> + regmap_write(regmap, bpd.bus_prot_clr, mask);
> +
> + if (bpd.flags & BUS_PROT_IGNORE_CLR_ACK)
> + return 0;
> +
> + return regmap_read_poll_timeout(regmap, bpd.bus_prot_sta,
> + val, !(val & mask),
> + MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
> +}
> +
> +static int scpsys_clamp_bus_protection_disable(struct scpsys_domain *pd)
> +{
> + int ret, i;
> +
> + for (i = pd->num_smi - 1 ; i >= 0; i--) {
> + ret = _scpsys_clamp_bus_protection_disable(pd->data->clamp_smi[i], pd->smi[i]);
> + if (ret)
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> static int scpsys_sram_enable(struct scpsys_domain *pd)
> {
> u32 pdn_ack = pd->data->sram_pdn_ack_bits;
> @@ -122,14 +188,6 @@ static int scpsys_sram_disable(struct scpsys_domain *pd)
> MTK_POLL_TIMEOUT);
> }
>
> -static struct regmap *scpsys_bus_protect_get_regmap(struct scpsys_domain *pd,
> - const struct scpsys_bus_prot_data *bpd)
> -{
> - if (bpd->flags & BUS_PROT_COMPONENT_SMI)
> - return pd->smi;
> - else
> - return pd->infracfg;
> -}
>
> static struct regmap *scpsys_bus_protect_get_sta_regmap(struct scpsys_domain *pd,
> const struct scpsys_bus_prot_data *bpd)
> @@ -137,14 +195,14 @@ static struct regmap *scpsys_bus_protect_get_sta_regmap(struct scpsys_domain *pd
> if (bpd->flags & BUS_PROT_STA_COMPONENT_INFRA_NAO)
> return pd->infracfg_nao;
> else
> - return scpsys_bus_protect_get_regmap(pd, bpd);
> + return pd->infracfg;
> }
>
> static int scpsys_bus_protect_clear(struct scpsys_domain *pd,
> const struct scpsys_bus_prot_data *bpd)
> {
> struct regmap *sta_regmap = scpsys_bus_protect_get_sta_regmap(pd, bpd);
> - struct regmap *regmap = scpsys_bus_protect_get_regmap(pd, bpd);
> + struct regmap *regmap = pd->infracfg;
> u32 sta_mask = bpd->bus_prot_sta_mask;
> u32 expected_ack;
> u32 val;
> @@ -168,7 +226,7 @@ static int scpsys_bus_protect_set(struct scpsys_domain *pd,
> const struct scpsys_bus_prot_data *bpd)
> {
> struct regmap *sta_regmap = scpsys_bus_protect_get_sta_regmap(pd, bpd);
> - struct regmap *regmap = scpsys_bus_protect_get_regmap(pd, bpd);
> + struct regmap *regmap = pd->infracfg;
> u32 sta_mask = bpd->bus_prot_sta_mask;
> u32 val;
>
> @@ -199,14 +257,19 @@ static int scpsys_bus_protect_enable(struct scpsys_domain *pd)
> return ret;
> }
>
> - return 0;
> + return scpsys_clamp_bus_protection_enable(pd);
> }
>
> static int scpsys_bus_protect_disable(struct scpsys_domain *pd)
> {
> + int ret;
> +
> + ret = scpsys_clamp_bus_protection_disable(pd);
> + if (ret)
> + return ret;
> +
> for (int i = SPM_MAX_BUS_PROT_DATA - 1; i >= 0; i--) {
> const struct scpsys_bus_prot_data *bpd = &pd->data->bp_cfg[i];
> - int ret;
>
> if (!bpd->bus_prot_set_clr_mask)
> continue;
> @@ -272,6 +335,12 @@ static int scpsys_power_on(struct generic_pm_domain *genpd)
> bool tmp;
> int ret;
>
> + if (MTK_SCPD_CAPS(pd, MTK_SCPD_CLAMP_PROTECTION)) {
> + ret = scpsys_clamp_bus_protection_enable(pd);
> + if (ret)
> + return ret;
> + }
> +
> ret = scpsys_regulator_enable(pd->supply);
> if (ret)
> return ret;
> @@ -318,6 +387,12 @@ static int scpsys_power_on(struct generic_pm_domain *genpd)
> if (ret < 0)
> goto err_disable_subsys_clks;
>
> + if (MTK_SCPD_CAPS(pd, MTK_SCPD_CLAMP_PROTECTION)) {
> + ret = scpsys_clamp_bus_protection_disable(pd);
> + if (ret)
> + return ret;
> + }
> +
> ret = scpsys_bus_protect_disable(pd);
> if (ret < 0)
> goto err_disable_sram;
> @@ -353,6 +428,12 @@ static int scpsys_power_off(struct generic_pm_domain *genpd)
> bool tmp;
> int ret;
>
> + if (MTK_SCPD_CAPS(pd, MTK_SCPD_CLAMP_PROTECTION)) {
> + ret = scpsys_clamp_bus_protection_enable(pd);
> + if (ret)
> + return ret;
> + }
> +
> ret = scpsys_bus_protect_enable(pd);
> if (ret < 0)
> return ret;
> @@ -450,12 +531,23 @@ generic_pm_domain *scpsys_add_one_domain(struct scpsys *scpsys, struct device_no
> if (IS_ERR(pd->infracfg))
> return ERR_CAST(pd->infracfg);
>
> - smi_node = of_parse_phandle(node, "mediatek,smi", 0);
> - if (smi_node) {
> - pd->smi = device_node_to_regmap(smi_node);
> - of_node_put(smi_node);
> - if (IS_ERR(pd->smi))
> - return ERR_CAST(pd->smi);
> + pd->num_smi = of_count_phandle_with_args(node, "mediatek,smi", NULL);
> + if (pd->num_smi > 0) {
> + pd->smi = devm_kcalloc(scpsys->dev, pd->num_smi, sizeof(*pd->smi), GFP_KERNEL);
> + if (!pd->smi)
> + return ERR_PTR(-ENOMEM);
> +
> + for (i = 0; i < pd->num_smi; i++) {
> + smi_node = of_parse_phandle(node, "mediatek,smi", i);
> + if (!smi_node)
> + return ERR_PTR(-EINVAL);
> +
> + pd->smi[i] = syscon_node_to_regmap(smi_node);
> + if (IS_ERR(pd->smi[i]))
> + return ERR_CAST(pd->smi[i]);
> + }
> + } else {
> + pd->num_smi = 0;
> }
>
> pd->num_larb = of_count_phandle_with_args(node, "mediatek,larb", NULL);
> diff --git a/drivers/pmdomain/mediatek/mtk-pm-domains.h b/drivers/pmdomain/mediatek/mtk-pm-domains.h
> index 31c2a1bb500f..f903e2943f0e 100644
> --- a/drivers/pmdomain/mediatek/mtk-pm-domains.h
> +++ b/drivers/pmdomain/mediatek/mtk-pm-domains.h
> @@ -13,6 +13,7 @@
> #define MTK_SCPD_EXT_BUCK_ISO BIT(6)
> #define MTK_SCPD_HAS_INFRA_NAO BIT(7)
> #define MTK_SCPD_STRICT_BUS_PROTECTION BIT(8)
> +#define MTK_SCPD_CLAMP_PROTECTION BIT(9)
> #define MTK_SCPD_CAPS(_scpd, _x) ((_scpd)->data->caps & (_x))
>
> #define SPM_VDE_PWR_CON 0x0210
> @@ -120,6 +121,7 @@ struct scpsys_domain_data {
> int ext_buck_iso_offs;
> u32 ext_buck_iso_mask;
> u16 caps;
> + const struct scpsys_bus_prot_data clamp_smi[SPM_MAX_BUS_PROT_DATA];
> const struct scpsys_bus_prot_data bp_cfg[SPM_MAX_BUS_PROT_DATA];
> const struct smi_reset_data reset_smi[SPM_MAX_SMI_RESET_DATA];
> int pwr_sta_offs;
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