This series is based on v5.5-rc1
changes since v7:
- reword in binding document [PATCH 02/14]
- fix error return checking bug in subsys clock control [PATCH 10/14]
- add power domains properity to mfgcfg patch [PATCH 14/14] from
https://patchwork.kernel.org/patch/11126199/
changes since v6:
- remove the patch of SPDX license identifier because it's already fixed
changes since v5:
- fix documentation in [PATCH 04/14]
- remove useless variable checking and reuse API of clock control in [PATCH 06/14]
- coding style fix of bus protection control in [PATCH 08/14]
- fix naming of new added data in [PATCH 09/14]
- small refactor of multiple step bus protection control in [PATCH 10/14]
changes since v4:
- add property to mt8183 smi-common
- seperate refactor patches and new add function
- add power controller device node
Weiyi Lu (9):
dt-bindings: mediatek: Add property to mt8183 smi-common
dt-bindings: soc: Add MT8183 power dt-bindings
soc: mediatek: Add basic_clk_id to scp_power_data
soc: mediatek: Add multiple step bus protection control
soc: mediatek: Add subsys clock control for bus protection
soc: mediatek: Add extra sram control
soc: mediatek: Add MT8183 scpsys support
arm64: dts: Add power controller device node of MT8183
arm64: dts: Add power-domains properity to mfgcfg
.../memory-controllers/mediatek,smi-common.txt | 2 +-
.../devicetree/bindings/soc/mediatek/scpsys.txt | 20 +-
arch/arm64/boot/dts/mediatek/mt8183.dtsi | 63 ++++
drivers/soc/mediatek/Makefile | 2 +-
drivers/soc/mediatek/mtk-scpsys-ext.c | 99 ++++++
drivers/soc/mediatek/mtk-scpsys.c | 389 +++++++++++++++++++--
include/dt-bindings/power/mt8183-power.h | 26 ++
include/linux/soc/mediatek/scpsys-ext.h | 39 +++
8 files changed, 614 insertions(+), 26 deletions(-)
create mode 100644 drivers/soc/mediatek/mtk-scpsys-ext.c
create mode 100644 include/dt-bindings/power/mt8183-power.h
create mode 100644 include/linux/soc/mediatek/scpsys-ext.h
For some power domains like vpu_core on MT8183 whose sram need to
do clock and internal isolation while power on/off sram.
We add a flag "sram_iso_ctrl" in scp_domain_data to judge if we
need to do the extra sram isolation control or not.
Signed-off-by: Weiyi Lu <[email protected]>
---
drivers/soc/mediatek/mtk-scpsys.c | 25 +++++++++++++++++++++++--
1 file changed, 23 insertions(+), 2 deletions(-)
diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
index 2bbf907..0676b46 100644
--- a/drivers/soc/mediatek/mtk-scpsys.c
+++ b/drivers/soc/mediatek/mtk-scpsys.c
@@ -57,6 +57,8 @@
#define PWR_ON_BIT BIT(2)
#define PWR_ON_2ND_BIT BIT(3)
#define PWR_CLK_DIS_BIT BIT(4)
+#define PWR_SRAM_CLKISO_BIT BIT(5)
+#define PWR_SRAM_ISOINT_B_BIT BIT(6)
#define PWR_STATUS_CONN BIT(1)
#define PWR_STATUS_DISP BIT(3)
@@ -115,6 +117,8 @@ enum clk_id {
* @name: The domain name.
* @sta_mask: The mask for power on/off status bit.
* @ctl_offs: The offset for main power control register.
+ * @sram_iso_ctrl: The flag to judge if the power domain need to do
+ * the extra sram isolation control.
* @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.
@@ -130,6 +134,7 @@ struct scp_domain_data {
const char *name;
u32 sta_mask;
int ctl_offs;
+ bool sram_iso_ctrl;
u32 sram_pdn_bits;
u32 sram_pdn_ack_bits;
u32 bus_prot_mask;
@@ -269,6 +274,14 @@ static int scpsys_sram_enable(struct scp_domain *scpd, void __iomem *ctl_addr)
return ret;
}
+ if (scpd->data->sram_iso_ctrl) {
+ val = readl(ctl_addr) | PWR_SRAM_ISOINT_B_BIT;
+ writel(val, ctl_addr);
+ udelay(1);
+ val &= ~PWR_SRAM_CLKISO_BIT;
+ writel(val, ctl_addr);
+ }
+
return 0;
}
@@ -278,8 +291,16 @@ static int scpsys_sram_disable(struct scp_domain *scpd, void __iomem *ctl_addr)
u32 pdn_ack = scpd->data->sram_pdn_ack_bits;
int tmp;
- val = readl(ctl_addr);
- val |= scpd->data->sram_pdn_bits;
+ if (scpd->data->sram_iso_ctrl) {
+ val = readl(ctl_addr);
+ val |= PWR_SRAM_CLKISO_BIT;
+ writel(val, ctl_addr);
+ val &= ~PWR_SRAM_ISOINT_B_BIT;
+ writel(val, ctl_addr);
+ udelay(1);
+ }
+
+ val = readl(ctl_addr) | scpd->data->sram_pdn_bits;
writel(val, ctl_addr);
/* Either wait until SRAM_PDN_ACK all 1 or 0 */
--
1.8.1.1.dirty
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.
Signed-off-by: Weiyi Lu <[email protected]>
---
drivers/soc/mediatek/Makefile | 2 +-
drivers/soc/mediatek/mtk-scpsys-ext.c | 99 +++++++++++++++++++++++++++++++++
drivers/soc/mediatek/mtk-scpsys.c | 39 +++++++++----
include/linux/soc/mediatek/scpsys-ext.h | 39 +++++++++++++
4 files changed, 168 insertions(+), 11 deletions(-)
create mode 100644 drivers/soc/mediatek/mtk-scpsys-ext.c
create mode 100644 include/linux/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-$(CONFIG_MTK_INFRACFG) += mtk-infracfg.o mtk-scpsys-ext.o
obj-$(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..4f1adda
--- /dev/null
+++ b/drivers/soc/mediatek/mtk-scpsys-ext.c
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 MediaTek Inc.
+ * Author: Owen Chen <[email protected]>
+ */
+#include <linux/ktime.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/soc/mediatek/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 ack_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 & ack_mask) == ack_mask,
+ MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
+}
+
+static int clear_bus_protection(struct regmap *map, u32 mask, u32 ack_mask,
+ u32 reg_clr, u32 reg_sta, u32 reg_en)
+{
+ u32 val;
+
+ if (reg_clr)
+ regmap_write(map, reg_clr, mask);
+ else
+ regmap_update_bits(map, reg_en, mask, 0);
+
+ return regmap_read_poll_timeout(map, reg_sta,
+ val, !(val & ack_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 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 = set_bus_protection(map,
+ bp_table[i].mask, bp_table[i].mask,
+ bp_table[i].set_ofs, bp_table[i].sta_ofs,
+ bp_table[i].en_ofs);
+
+ 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_ack_mask,
+ bp_table[i].clr_ofs, bp_table[i].sta_ofs,
+ bp_table[i].en_ofs);
+
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
index 915d635..466bb749 100644
--- a/drivers/soc/mediatek/mtk-scpsys.c
+++ b/drivers/soc/mediatek/mtk-scpsys.c
@@ -12,6 +12,7 @@
#include <linux/pm_domain.h>
#include <linux/regulator/consumer.h>
#include <linux/soc/mediatek/infracfg.h>
+#include <linux/soc/mediatek/scpsys-ext.h>
#include <dt-bindings/power/mt2701-power.h>
#include <dt-bindings/power/mt2712-power.h>
@@ -120,6 +121,7 @@ enum clk_id {
* @basic_clk_id: provide the same purpose with field "clk_id"
* by declaring basic clock prefix name rather than clk_id.
* @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;
@@ -131,6 +133,7 @@ struct scp_domain_data {
enum clk_id clk_id[MAX_CLKS];
const char *basic_clk_id[MAX_CLKS];
u8 caps;
+ struct bus_prot bp_table[MAX_STEPS];
};
struct scp;
@@ -154,6 +157,7 @@ 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;
};
@@ -283,24 +287,28 @@ static int scpsys_bus_protect_enable(struct scp_domain *scpd)
{
struct scp *scp = scpd->scp;
- if (!scpd->data->bus_prot_mask)
- return 0;
+ if (scpd->data->bus_prot_mask) {
+ return mtk_infracfg_set_bus_protection(scp->infracfg,
+ scpd->data->bus_prot_mask,
+ scp->bus_prot_reg_update);
+ }
- 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);
}
static int scpsys_bus_protect_disable(struct scp_domain *scpd)
{
struct scp *scp = scpd->scp;
- if (!scpd->data->bus_prot_mask)
- return 0;
+ if (scpd->data->bus_prot_mask) {
+ return mtk_infracfg_clear_bus_protection(scp->infracfg,
+ scpd->data->bus_prot_mask,
+ scp->bus_prot_reg_update);
+ }
- 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)
@@ -469,6 +477,17 @@ 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];
diff --git a/include/linux/soc/mediatek/scpsys-ext.h b/include/linux/soc/mediatek/scpsys-ext.h
new file mode 100644
index 0000000..3e5b84d
--- /dev/null
+++ b/include/linux/soc/mediatek/scpsys-ext.h
@@ -0,0 +1,39 @@
+/* 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, _clr_ack_mask) { \
+ .type = _type, \
+ .set_ofs = _set_ofs, \
+ .clr_ofs = _clr_ofs, \
+ .en_ofs = _en_ofs, \
+ .sta_ofs = _sta_ofs, \
+ .mask = _mask, \
+ .clr_ack_mask = _clr_ack_mask, \
+ }
+
+enum regmap_type {
+ INVALID_TYPE = 0,
+ IFR_TYPE,
+ SMI_TYPE,
+};
+
+struct bus_prot {
+ enum regmap_type type;
+ u32 set_ofs;
+ u32 clr_ofs;
+ u32 en_ofs;
+ u32 sta_ofs;
+ u32 mask;
+ u32 clr_ack_mask;
+};
+
+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 */
--
1.8.1.1.dirty
On Wed, Dec 18, 2019 at 10:25 AM Weiyi Lu <[email protected]> wrote:
>
> On Tue, 2019-12-17 at 13:33 +0800, Nicolas Boichat wrote:
> > On Tue, Dec 17, 2019 at 10:51 AM Weiyi Lu <[email protected]> wrote:
> > >
> > > On Mon, 2019-12-16 at 15:21 +0800, Nicolas Boichat wrote:
> > > > On Tue, Dec 10, 2019 at 2:47 PM Weiyi Lu <[email protected]> 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.
> > > > >
> > > > > Signed-off-by: Weiyi Lu <[email protected]>
> > > > > ---
> > > > > drivers/soc/mediatek/Makefile | 2 +-
> > > > > drivers/soc/mediatek/mtk-scpsys-ext.c | 99 +++++++++++++++++++++++++++++++++
> > > > > drivers/soc/mediatek/mtk-scpsys.c | 39 +++++++++----
> > > > > include/linux/soc/mediatek/scpsys-ext.h | 39 +++++++++++++
> > > > > 4 files changed, 168 insertions(+), 11 deletions(-)
> > > > > create mode 100644 drivers/soc/mediatek/mtk-scpsys-ext.c
> > > > > create mode 100644 include/linux/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
> > > > > 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..4f1adda
> > > > > --- /dev/null
> > > > > +++ b/drivers/soc/mediatek/mtk-scpsys-ext.c
> > > > > @@ -0,0 +1,99 @@
> > > > > +// SPDX-License-Identifier: GPL-2.0
> > > > > +/*
> > > > > + * Copyright (c) 2018 MediaTek Inc.
> > > > > + * Author: Owen Chen <[email protected]>
> > > > > + */
> > > > > +#include <linux/ktime.h>
> > > > > +#include <linux/mfd/syscon.h>
> > > > > +#include <linux/of_device.h>
> > > > > +#include <linux/regmap.h>
> > > > > +#include <linux/soc/mediatek/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 ack_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);
> > > >
> > > > At least for 8183, we never seen to use the reg_set case, can we
> > > > simplify this function?
> > > >
> > >
> > > Actually 6765 will use it and all the other MediaTek chips at least in
> > > near future.
> > > https://patchwork.kernel.org/patch/11042003/
> >
> > Ok, that's fine then.
> >
> > > > > +
> > > > > + return regmap_read_poll_timeout(map, reg_sta,
> > > > > + val, (val & ack_mask) == ack_mask,
> > > > > + MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
> > > >
> > > > From 8183, I see that you have either:
> > > > 1. mask == ack_mask
> > > > 2. ack_mask == 0 (essentially this skips this test)
> > > >
> > > > Would it be simpler to just skip this test if reg_sta == 0, and always
> > > > assume mask == ack_mask otherwise?
> > > >
> > > > e.g.
> > > > if (reg_sta == 0)
> > > > return 0;
> > > >
> > > > return regmap_read_poll_timeout(map, reg_sta,
> > > > val, (val & mask) == mask,
> > > > MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
> > > >
> > >
> > > I'm not sure if you mean ack_mask == 0?
> > > reg_sta would be possible to be 0 because it's a register address
> > > offset.
> >
> > Right, so maybe "0" is not a good invalid value, or maybe you can have a
> > #define REG_STA_INVALID U32_MAX
> >
> > And then test for:
> > if (reg_sta == REG_STA_INVALID)
> > return 0;
> >
> > My point here is that mask and ack_mask are always the same (unless
> > you don't care about reading back the status), so maybe you only need
> > to specify mask?
> >
> > (but if you need different mask and ack_mask for future chips, feel
> > free to ignore)
> >
>
> I do need different mask and ack_mask.
> For the special case of 8183 here, we still have to check the ack status
> when setting bus protection but only ignore the ack status when clearing
> bus protection.
>
> case A.
> SET: reg_set, reg_sta, mask == ack mask
> CLEAR: reg_clr, reg_sta, mask == clear ack mask
>
> case B. (the special case we discussed)
> SET: reg_set, reg_sta, mask == ack mask
> CLEAR: reg_clr, reg_sta, mask != clear ack mask(which is 0 now)
>
> If I use the REG_STA_INVALID to replace the clear ack mask way.
> I might need two reg_sta to satisfy the check of set and clear bus
> protection.
> One is valid for setting case and another is invalid for clearing case,
> e.g. case 2 below
>
> case 1.
> SET: reg_set, reg_sta(valid), mask == ack mask
> CLEAR: reg_clr, reg_sta(valid), mask == ack mask
>
> case 2.
> SET: reg_set, reg_sta(valid), mask == ack mask
> CLEAR: reg_clr, reg_sta(invalid then return), mask == ack mask
>
> so I'd like to keep the original proposal. What do you think?
Ooh, I see. This is quite confusing to be honest... I wonder if it
wouldn't be clearer to have a boolean instead in bus_prot (something
like "clk_no_check", can't find a better name right now).