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Date: Wed, 12 Feb 2020 10:55:50 +0800
From: Weiyi Lu <weiyi.lu@...iatek.com>
To: Matthias Brugger <matthias.bgg@...il.com>
CC: Nicolas Boichat <drinkcat@...omium.org>,
Rob Herring <robh@...nel.org>,
Sascha Hauer <kernel@...gutronix.de>,
James Liao <jamesjj.liao@...iatek.com>,
Fan Chen <fan.chen@...iatek.com>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>,
<linux-mediatek@...ts.infradead.org>, <srv_heupstream@...iatek.com>
Subject: Re: [PATCH v11 04/10] soc: mediatek: Add multiple step bus
protection control
On Tue, 2020-02-11 at 18:49 +0100, Matthias Brugger wrote:
>
> On 20/12/2019 04:45, Weiyi Lu wrote:
> > Both MT8183 & MT6765 have more control steps of bus protection
> > than previous project. And there add more bus protection registers
> > reside at infracfg & smi-common. Also add new APIs for multiple
> > step bus protection control with more customized arguments.
> > And then use bp_table for bus protection of all compatibles,
> > instead of mixing bus_prot_mask and bus_prot_reg_update.
> >
> > Signed-off-by: Weiyi Lu <weiyi.lu@...iatek.com>
> > ---
> > drivers/soc/mediatek/Makefile | 2 +-
> > drivers/soc/mediatek/mtk-scpsys-ext.c | 101 +++++++++++++++++++++++++++++
> > drivers/soc/mediatek/mtk-scpsys.c | 117 +++++++++++++++++++++-------------
> > drivers/soc/mediatek/scpsys-ext.h | 67 +++++++++++++++++++
> > 4 files changed, 240 insertions(+), 47 deletions(-)
> > create mode 100644 drivers/soc/mediatek/mtk-scpsys-ext.c
> > create mode 100644 drivers/soc/mediatek/scpsys-ext.h
> >
> > diff --git a/drivers/soc/mediatek/Makefile b/drivers/soc/mediatek/Makefile
> > index b017330..b442be9 100644
> > --- a/drivers/soc/mediatek/Makefile
> > +++ b/drivers/soc/mediatek/Makefile
> > @@ -1,5 +1,5 @@
> > # SPDX-License-Identifier: GPL-2.0-only
> > obj-$(CONFIG_MTK_CMDQ) += mtk-cmdq-helper.o
> > -obj-$(CONFIG_MTK_INFRACFG) += mtk-infracfg.o
> > +obj-$(CONFIG_MTK_INFRACFG) += mtk-infracfg.o mtk-scpsys-ext.o
>
> It seems that we would need another patch which get's rid of the mtk-infracfg
> first and then add stuff like the possibility to have different steps.
>
Actually I have a PATCH 05/11 to remove the mtk-infracfg.
In this patch, I have some changes, like calling
mtk_scpsys_ext_set_bus_protection(...) instead of
mtk_infracfg_set_bus_protection(...) in scpsys_bus_protect_enable(...)
and replacing bus_prot_mask by bp_table.
I thought I should introduce the new method first and remove useless one
later. What do you think?
> > obj-$(CONFIG_MTK_PMIC_WRAP) += mtk-pmic-wrap.o
> > obj-$(CONFIG_MTK_SCPSYS) += mtk-scpsys.o
> > diff --git a/drivers/soc/mediatek/mtk-scpsys-ext.c b/drivers/soc/mediatek/mtk-scpsys-ext.c
> > new file mode 100644
> > index 0000000..df402ac
> > --- /dev/null
> > +++ b/drivers/soc/mediatek/mtk-scpsys-ext.c
>
> I'm not quite sure why we should put this into a new file. I suppose the
> rational behind it is the fact that we access other blocks through regmap.
>
Yes, those operation are accross infracfg and smi-common so we put these
into new files.
> > @@ -0,0 +1,101 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (c) 2018 MediaTek Inc.
> > + * Author: Owen Chen <Owen.Chen@...iatek.com>
> > + */
> > +#include <linux/ktime.h>
> > +#include <linux/mfd/syscon.h>
> > +#include <linux/of_device.h>
> > +#include <linux/regmap.h>
> > +#include "scpsys-ext.h"
> > +
> > +#define MTK_POLL_DELAY_US 10
> > +#define MTK_POLL_TIMEOUT USEC_PER_SEC
> > +
> > +static int set_bus_protection(struct regmap *map, u32 mask,
> > + u32 reg_set, u32 reg_sta, u32 reg_en)
> > +{
> > + u32 val;
> > +
> > + if (reg_set)
> > + regmap_write(map, reg_set, mask);
> > + else
> > + regmap_update_bits(map, reg_en, mask, mask);
> > +
> > + return regmap_read_poll_timeout(map, reg_sta,
> > + val, (val & mask) == mask,
> > + MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
> > +}
> > +
> > +static int clear_bus_protection(struct regmap *map, u32 mask,
> > + u32 reg_clr, u32 reg_sta, u32 reg_en, bool ignore_ack)
> > +{
> > + u32 val;
> > +
> > + if (reg_clr)
> > + regmap_write(map, reg_clr, mask);
> > + else
> > + regmap_update_bits(map, reg_en, mask, 0);
> > +
> > + if (ignore_ack)
> > + return 0;
> > +
> > + return regmap_read_poll_timeout(map, reg_sta,
> > + val, !(val & mask),
> > + MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
> > +}
> > +
> > +int mtk_scpsys_ext_set_bus_protection(const struct bus_prot *bp_table,
> > + struct regmap *infracfg, struct regmap *smi_common)
> > +{
> > + int i;
> > +
> > + for (i = 0; i < MAX_STEPS; i++) {
>
> struct bus_prot bp_table = bp_table[i];
>
OK, got it.
> > + struct regmap *map = NULL;
> > + int ret;
> > +
> > + if (bp_table[i].type == INVALID_TYPE)
> > + break;
> > + else if (bp_table[i].type == IFR_TYPE)
> > + map = infracfg;
> > + else if (bp_table[i].type == SMI_TYPE)
> > + map = smi_common;
>
> if (bp_table.type == IFR_TYPE)
> map = infracfg;
> else if (bp_table.type == SMI_TYPE)
> map = smi_common;
> else
> break;
>
OK, got it.
> > +
> > + ret = set_bus_protection(map,
> > + bp_table[i].mask, bp_table[i].set_ofs,
> > + bp_table[i].sta_ofs, bp_table[i].en_ofs);
>
> passing map and bp_table here makes code much more readable. I always end-up
> counting the variables when the names in the callee changes.
>
OK, I'll fix it.
> > +
> > + if (ret)
> > + return ret;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +int mtk_scpsys_ext_clear_bus_protection(const struct bus_prot *bp_table,
> > + struct regmap *infracfg, struct regmap *smi_common)
> > +{
> > + int i;
> > +
> > + for (i = MAX_STEPS - 1; i >= 0; i--) {
> > + struct regmap *map = NULL;
> > + int ret;
> > +
> > + if (bp_table[i].type == INVALID_TYPE)
> > + continue;
> > + else if (bp_table[i].type == IFR_TYPE)
> > + map = infracfg;
> > + else if (bp_table[i].type == SMI_TYPE)
> > + map = smi_common;
> > +
> > + ret = clear_bus_protection(map,
> > + bp_table[i].mask, bp_table[i].clr_ofs,
> > + bp_table[i].sta_ofs, bp_table[i].en_ofs,
> > + bp_table[i].ignore_clr_ack);
> > +
>
> same here.
>
Got it.
> > + if (ret)
> > + return ret;
> > + }
> > +
> > + return 0;
> > +}
> > diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
> > index db35a28..763ca58 100644
> > --- a/drivers/soc/mediatek/mtk-scpsys.c
> > +++ b/drivers/soc/mediatek/mtk-scpsys.c
> > @@ -11,7 +11,7 @@
> > #include <linux/platform_device.h>
> > #include <linux/pm_domain.h>
> > #include <linux/regulator/consumer.h>
> > -#include <linux/soc/mediatek/infracfg.h>
> > +#include "scpsys-ext.h"
> >
> > #include <dt-bindings/power/mt2701-power.h>
> > #include <dt-bindings/power/mt2712-power.h>
> > @@ -87,9 +87,9 @@
> > * @ctl_offs: The offset for main power control register.
> > * @sram_pdn_bits: The mask for sram power control bits.
> > * @sram_pdn_ack_bits: The mask for sram power control acked bits.
> > - * @bus_prot_mask: The mask for single step bus protection.
> > * @basic_clk_name: The basic clocks required by this power domain.
> > * @caps: The flag for active wake-up action.
> > + * @bp_table: The mask table for multiple step bus protection.
> > */
> > struct scp_domain_data {
> > const char *name;
> > @@ -97,9 +97,9 @@ struct scp_domain_data {
> > int ctl_offs;
> > u32 sram_pdn_bits;
> > u32 sram_pdn_ack_bits;
> > - u32 bus_prot_mask;
> > const char *basic_clk_name[MAX_CLKS];
> > u8 caps;
> > + struct bus_prot bp_table[MAX_STEPS];
> > };
> >
> > struct scp;
> > @@ -123,8 +123,8 @@ struct scp {
> > struct device *dev;
> > void __iomem *base;
> > struct regmap *infracfg;
> > + struct regmap *smi_common;
> > struct scp_ctrl_reg ctrl_reg;
> > - bool bus_prot_reg_update;
> > };
> >
> > struct scp_subdomain {
> > @@ -138,7 +138,6 @@ struct scp_soc_data {
> > const struct scp_subdomain *subdomains;
> > int num_subdomains;
> > const struct scp_ctrl_reg regs;
> > - bool bus_prot_reg_update;
> > };
> >
> > static int scpsys_domain_is_on(struct scp_domain *scpd)
> > @@ -252,24 +251,16 @@ static int scpsys_bus_protect_enable(struct scp_domain *scpd)
> > {
> > struct scp *scp = scpd->scp;
> >
> > - if (!scpd->data->bus_prot_mask)
> > - return 0;
> > -
> > - return mtk_infracfg_set_bus_protection(scp->infracfg,
> > - scpd->data->bus_prot_mask,
> > - scp->bus_prot_reg_update);
> > + return mtk_scpsys_ext_set_bus_protection(scpd->data->bp_table,
> > + scp->infracfg, scp->smi_common);
>
> Now that's just a wrapper which does add nothing but another indirection. We can
> call mtk_scpsys_ext_set_bus_protection() directly (also I don't like the name,
> actually why don't mtk_scpsys_set_bus_protection()?)
>
You're right. I'll called mtk_scpsys_ext_set_bus_protection() directly.
> > }
> >
> > static int scpsys_bus_protect_disable(struct scp_domain *scpd)
> > {
> > struct scp *scp = scpd->scp;
> >
> > - if (!scpd->data->bus_prot_mask)
> > - return 0;
> > -
> > - return mtk_infracfg_clear_bus_protection(scp->infracfg,
> > - scpd->data->bus_prot_mask,
> > - scp->bus_prot_reg_update);
> > + return mtk_scpsys_ext_clear_bus_protection(scpd->data->bp_table,
> > + scp->infracfg, scp->smi_common);
> > }
> >
> > static int scpsys_power_on(struct generic_pm_domain *genpd)
> > @@ -404,8 +395,7 @@ static int init_basic_clks(struct platform_device *pdev, struct clk **clk,
> >
> > static struct scp *init_scp(struct platform_device *pdev,
> > const struct scp_domain_data *scp_domain_data, int num,
> > - const struct scp_ctrl_reg *scp_ctrl_reg,
> > - bool bus_prot_reg_update)
> > + const struct scp_ctrl_reg *scp_ctrl_reg)
> > {
> > struct genpd_onecell_data *pd_data;
> > struct resource *res;
> > @@ -419,8 +409,6 @@ static struct scp *init_scp(struct platform_device *pdev,
> > scp->ctrl_reg.pwr_sta_offs = scp_ctrl_reg->pwr_sta_offs;
> > scp->ctrl_reg.pwr_sta2nd_offs = scp_ctrl_reg->pwr_sta2nd_offs;
> >
> > - scp->bus_prot_reg_update = bus_prot_reg_update;
> > -
> > scp->dev = &pdev->dev;
> >
> > res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > @@ -448,6 +436,17 @@ static struct scp *init_scp(struct platform_device *pdev,
> > return ERR_CAST(scp->infracfg);
> > }
> >
> > + scp->smi_common = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
> > + "smi_comm");
> > +
> > + if (scp->smi_common == ERR_PTR(-ENODEV)) {
> > + scp->smi_common = NULL;
> > + } else if (IS_ERR(scp->smi_common)) {
> > + dev_err(&pdev->dev, "Cannot find smi_common controller: %ld\n",
> > + PTR_ERR(scp->smi_common));
> > + return ERR_CAST(scp->smi_common);
> > + }
> > +
> > for (i = 0; i < num; i++) {
> > struct scp_domain *scpd = &scp->domains[i];
> > const struct scp_domain_data *data = &scp_domain_data[i];
> > @@ -530,8 +529,11 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> > .name = "conn",
> > .sta_mask = PWR_STATUS_CONN,
> > .ctl_offs = SPM_CONN_PWR_CON,
> > - .bus_prot_mask = MT2701_TOP_AXI_PROT_EN_CONN_M |
> > - MT2701_TOP_AXI_PROT_EN_CONN_S,
> > + .bp_table = {
> > + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
> > + MT2701_TOP_AXI_PROT_EN_CONN_M |
> > + MT2701_TOP_AXI_PROT_EN_CONN_S),
> > + },
> > .caps = MTK_SCPD_ACTIVE_WAKEUP,
> > },
> > [MT2701_POWER_DOMAIN_DISP] = {
> > @@ -540,7 +542,10 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> > .ctl_offs = SPM_DIS_PWR_CON,
> > .sram_pdn_bits = GENMASK(11, 8),
> > .basic_clk_name = {"mm"},
> > - .bus_prot_mask = MT2701_TOP_AXI_PROT_EN_MM_M0,
> > + .bp_table = {
> > + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
> > + MT2701_TOP_AXI_PROT_EN_MM_M0),
> > + },
> > .caps = MTK_SCPD_ACTIVE_WAKEUP,
> > },
> > [MT2701_POWER_DOMAIN_MFG] = {
> > @@ -675,7 +680,10 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> > .sram_pdn_bits = GENMASK(8, 8),
> > .sram_pdn_ack_bits = GENMASK(16, 16),
> > .basic_clk_name = {"mfg"},
> > - .bus_prot_mask = BIT(14) | BIT(21) | BIT(23),
> > + .bp_table = {
> > + BUS_PROT(IFR_TYPE, 0x260, 0x264, 0x220, 0x228,
> > + BIT(14) | BIT(21) | BIT(23)),
> > + },
> > .caps = MTK_SCPD_ACTIVE_WAKEUP,
> > },
> > [MT2712_POWER_DOMAIN_MFG_SC1] = {
> > @@ -747,7 +755,10 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> > .sram_pdn_bits = GENMASK(8, 8),
> > .sram_pdn_ack_bits = GENMASK(12, 12),
> > .basic_clk_name = {"mm"},
> > - .bus_prot_mask = (BIT(1) | BIT(2)),
> > + .bp_table = {
> > + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
> > + BIT(1) | BIT(2)),
> > + },
> > },
> > [MT6797_POWER_DOMAIN_AUDIO] = {
> > .name = "audio",
> > @@ -794,7 +805,10 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> > .ctl_offs = SPM_ETHSYS_PWR_CON,
> > .sram_pdn_bits = GENMASK(11, 8),
> > .sram_pdn_ack_bits = GENMASK(15, 12),
> > - .bus_prot_mask = MT7622_TOP_AXI_PROT_EN_ETHSYS,
> > + .bp_table = {
> > + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
> > + MT7622_TOP_AXI_PROT_EN_ETHSYS),
> > + },
> > .caps = MTK_SCPD_ACTIVE_WAKEUP,
> > },
> > [MT7622_POWER_DOMAIN_HIF0] = {
> > @@ -804,7 +818,10 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> > .sram_pdn_bits = GENMASK(11, 8),
> > .sram_pdn_ack_bits = GENMASK(15, 12),
> > .basic_clk_name = {"hif_sel"},
> > - .bus_prot_mask = MT7622_TOP_AXI_PROT_EN_HIF0,
> > + .bp_table = {
> > + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
> > + MT7622_TOP_AXI_PROT_EN_HIF0),
> > + },
> > .caps = MTK_SCPD_ACTIVE_WAKEUP,
> > },
> > [MT7622_POWER_DOMAIN_HIF1] = {
> > @@ -814,7 +831,10 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> > .sram_pdn_bits = GENMASK(11, 8),
> > .sram_pdn_ack_bits = GENMASK(15, 12),
> > .basic_clk_name = {"hif_sel"},
> > - .bus_prot_mask = MT7622_TOP_AXI_PROT_EN_HIF1,
> > + .bp_table = {
> > + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
> > + MT7622_TOP_AXI_PROT_EN_HIF1),
> > + },
> > .caps = MTK_SCPD_ACTIVE_WAKEUP,
> > },
> > [MT7622_POWER_DOMAIN_WB] = {
> > @@ -823,7 +843,10 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> > .ctl_offs = SPM_WB_PWR_CON,
> > .sram_pdn_bits = 0,
> > .sram_pdn_ack_bits = 0,
> > - .bus_prot_mask = MT7622_TOP_AXI_PROT_EN_WB,
> > + .bp_table = {
> > + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
> > + MT7622_TOP_AXI_PROT_EN_WB),
> > + },
> > .caps = MTK_SCPD_ACTIVE_WAKEUP | MTK_SCPD_FWAIT_SRAM,
> > },
> > };
> > @@ -837,8 +860,11 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> > .name = "conn",
> > .sta_mask = PWR_STATUS_CONN,
> > .ctl_offs = SPM_CONN_PWR_CON,
> > - .bus_prot_mask = MT2701_TOP_AXI_PROT_EN_CONN_M |
> > - MT2701_TOP_AXI_PROT_EN_CONN_S,
> > + .bp_table = {
> > + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
> > + MT2701_TOP_AXI_PROT_EN_CONN_M |
> > + MT2701_TOP_AXI_PROT_EN_CONN_S),
> > + },
> > .caps = MTK_SCPD_ACTIVE_WAKEUP,
> > },
> > [MT7623A_POWER_DOMAIN_ETH] = {
> > @@ -903,8 +929,11 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> > .sram_pdn_bits = GENMASK(11, 8),
> > .sram_pdn_ack_bits = GENMASK(12, 12),
> > .basic_clk_name = {"mm"},
> > - .bus_prot_mask = MT8173_TOP_AXI_PROT_EN_MM_M0 |
> > - MT8173_TOP_AXI_PROT_EN_MM_M1,
> > + .bp_table = {
> > + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
> > + MT8173_TOP_AXI_PROT_EN_MM_M0 |
> > + MT8173_TOP_AXI_PROT_EN_MM_M1),
> > + },
> > },
> > [MT8173_POWER_DOMAIN_VENC_LT] = {
> > .name = "venc_lt",
> > @@ -950,10 +979,13 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> > .ctl_offs = SPM_MFG_PWR_CON,
> > .sram_pdn_bits = GENMASK(13, 8),
> > .sram_pdn_ack_bits = GENMASK(21, 16),
> > - .bus_prot_mask = MT8173_TOP_AXI_PROT_EN_MFG_S |
> > - MT8173_TOP_AXI_PROT_EN_MFG_M0 |
> > - MT8173_TOP_AXI_PROT_EN_MFG_M1 |
> > - MT8173_TOP_AXI_PROT_EN_MFG_SNOOP_OUT,
> > + .bp_table = {
> > + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228,
> > + MT8173_TOP_AXI_PROT_EN_MFG_S |
> > + MT8173_TOP_AXI_PROT_EN_MFG_M0 |
> > + MT8173_TOP_AXI_PROT_EN_MFG_M1 |
> > + MT8173_TOP_AXI_PROT_EN_MFG_SNOOP_OUT),
> > + },
> > },
> > };
> >
> > @@ -969,7 +1001,6 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> > .pwr_sta_offs = SPM_PWR_STATUS,
> > .pwr_sta2nd_offs = SPM_PWR_STATUS_2ND
> > },
> > - .bus_prot_reg_update = true,
> > };
> >
> > static const struct scp_soc_data mt2712_data = {
> > @@ -981,7 +1012,6 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> > .pwr_sta_offs = SPM_PWR_STATUS,
> > .pwr_sta2nd_offs = SPM_PWR_STATUS_2ND
> > },
> > - .bus_prot_reg_update = false,
> > };
> >
> > static const struct scp_soc_data mt6797_data = {
> > @@ -993,7 +1023,6 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> > .pwr_sta_offs = SPM_PWR_STATUS_MT6797,
> > .pwr_sta2nd_offs = SPM_PWR_STATUS_2ND_MT6797
> > },
> > - .bus_prot_reg_update = true,
> > };
> >
> > static const struct scp_soc_data mt7622_data = {
> > @@ -1003,7 +1032,6 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> > .pwr_sta_offs = SPM_PWR_STATUS,
> > .pwr_sta2nd_offs = SPM_PWR_STATUS_2ND
> > },
> > - .bus_prot_reg_update = true,
> > };
> >
> > static const struct scp_soc_data mt7623a_data = {
> > @@ -1013,7 +1041,6 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> > .pwr_sta_offs = SPM_PWR_STATUS,
> > .pwr_sta2nd_offs = SPM_PWR_STATUS_2ND
> > },
> > - .bus_prot_reg_update = true,
> > };
> >
> > static const struct scp_soc_data mt8173_data = {
> > @@ -1025,7 +1052,6 @@ static void mtk_register_power_domains(struct platform_device *pdev,
> > .pwr_sta_offs = SPM_PWR_STATUS,
> > .pwr_sta2nd_offs = SPM_PWR_STATUS_2ND
> > },
> > - .bus_prot_reg_update = true,
> > };
> >
> > /*
> > @@ -1066,8 +1092,7 @@ static int scpsys_probe(struct platform_device *pdev)
> >
> > soc = of_device_get_match_data(&pdev->dev);
> >
> > - scp = init_scp(pdev, soc->domains, soc->num_domains, &soc->regs,
> > - soc->bus_prot_reg_update);
> > + scp = init_scp(pdev, soc->domains, soc->num_domains, &soc->regs);
> > if (IS_ERR(scp))
> > return PTR_ERR(scp);
> >
> > diff --git a/drivers/soc/mediatek/scpsys-ext.h b/drivers/soc/mediatek/scpsys-ext.h
> > new file mode 100644
> > index 0000000..458b2c5
> > --- /dev/null
> > +++ b/drivers/soc/mediatek/scpsys-ext.h
> > @@ -0,0 +1,67 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +#ifndef __SOC_MEDIATEK_SCPSYS_EXT_H
> > +#define __SOC_MEDIATEK_SCPSYS_EXT_H
> > +
> > +#define MAX_STEPS 4
> > +
> > +#define _BUS_PROT(_type, _set_ofs, _clr_ofs, \
> > + _en_ofs, _sta_ofs, _mask, _ignore_clr_ack) { \
> > + .type = _type, \
> > + .set_ofs = _set_ofs, \
> > + .clr_ofs = _clr_ofs, \
> > + .en_ofs = _en_ofs, \
> > + .sta_ofs = _sta_ofs, \
> > + .mask = _mask, \
> > + .ignore_clr_ack = _ignore_clr_ack, \
> > + }
> > +
> > +#define BUS_PROT(_type, _set_ofs, _clr_ofs, \
> > + _en_ofs, _sta_ofs, _mask) \
> > + _BUS_PROT(_type, _set_ofs, _clr_ofs, \
> > + _en_ofs, _sta_ofs, _mask, false)
> > +
> > +#define BUS_PROT_IGN(_type, _set_ofs, _clr_ofs, \
> > + _en_ofs, _sta_ofs, _mask) \
> > + _BUS_PROT(_type, _set_ofs, _clr_ofs, \
> > + _en_ofs, _sta_ofs, _mask, true)
> > +
> > +#define MT2701_TOP_AXI_PROT_EN_MM_M0 BIT(1)
> > +#define MT2701_TOP_AXI_PROT_EN_CONN_M BIT(2)
> > +#define MT2701_TOP_AXI_PROT_EN_CONN_S BIT(8)
> > +
> > +#define MT7622_TOP_AXI_PROT_EN_ETHSYS (BIT(3) | BIT(17))
> > +#define MT7622_TOP_AXI_PROT_EN_HIF0 (BIT(24) | BIT(25))
> > +#define MT7622_TOP_AXI_PROT_EN_HIF1 (BIT(26) | BIT(27) | \
> > + BIT(28))
> > +#define MT7622_TOP_AXI_PROT_EN_WB (BIT(2) | BIT(6) | \
> > + BIT(7) | BIT(8))
> > +
> > +#define MT8173_TOP_AXI_PROT_EN_MM_M0 BIT(1)
> > +#define MT8173_TOP_AXI_PROT_EN_MM_M1 BIT(2)
> > +#define MT8173_TOP_AXI_PROT_EN_MFG_S BIT(14)
> > +#define MT8173_TOP_AXI_PROT_EN_MFG_M0 BIT(21)
> > +#define MT8173_TOP_AXI_PROT_EN_MFG_M1 BIT(22)
> > +#define MT8173_TOP_AXI_PROT_EN_MFG_SNOOP_OUT BIT(23)
> > +
> > +enum regmap_type {
> > + INVALID_TYPE = 0,
> > + IFR_TYPE,
> > + SMI_TYPE,
> > +};
> > +
> > +struct bus_prot {
> > + enum regmap_type type;
> > + u32 set_ofs;
> > + u32 clr_ofs;
>
> Please try to keep variable names consistent. You change for example set_ofs to
> reg_set. That makes the code more difficult to read and understand.
>
OK, I'll keep those names consistent.
> > + u32 en_ofs;
> > + u32 sta_ofs;
> > + u32 mask;
> > + bool ignore_clr_ack;
> > +};
> > +
> > +int mtk_scpsys_ext_set_bus_protection(const struct bus_prot *bp_table,
> > + struct regmap *infracfg, struct regmap *smi_common);
> > +int mtk_scpsys_ext_clear_bus_protection(const struct bus_prot *bp_table,
> > + struct regmap *infracfg, struct regmap *smi_common);
> > +
> > +#endif /* __SOC_MEDIATEK_SCPSYS_EXT_H */
> >
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