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Message-Id: <20230713150414.891893-7-msp@baylibre.com>
Date: Thu, 13 Jul 2023 17:04:12 +0200
From: Markus Schneider-Pargmann <msp@...libre.com>
To: Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>
Cc: Chun-Jie Chen <chun-jie.chen@...iatek.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Tinghan Shen <tinghan.shen@...iatek.com>,
Fabien Parent <parent.f@...il.com>, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org,
Alexandre Bailon <abailon@...libre.com>,
Fabien Parent <fparent@...libre.com>,
Markus Schneider-Pargmann <msp@...libre.com>,
Alexandre Mergnat <amergnat@...libre.com>
Subject: [PATCH v7 6/8] soc: mediatek: Add support for WAY_EN operations
From: Alexandre Bailon <abailon@...libre.com>
This updates the power domain to support WAY_EN operations. WAY_EN
operations on mt8365 are using a different component to check for the
acknowledgment, namely the infracfg-nao component. Also to enable a way
it the bit needs to be cleared while disabling a way needs a bit to be
set. To support these two operations two flags are added,
BUS_PROT_INVERTED and BUS_PROT_STA_COMPONENT_INFRA_NAO. Additionally
another regmap is created if the INFRA_NAO capability is set.
This operation is required by the mt8365 for the MM power domain.
Signed-off-by: Alexandre Bailon <abailon@...libre.com>
Signed-off-by: Fabien Parent <fparent@...libre.com>
Signed-off-by: Markus Schneider-Pargmann <msp@...libre.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Reviewed-by: Alexandre Mergnat <amergnat@...libre.com>
Tested-by: Alexandre Mergnat <amergnat@...libre.com>
---
drivers/soc/mediatek/mtk-pm-domains.c | 39 +++++++++++++++++++++++----
drivers/soc/mediatek/mtk-pm-domains.h | 3 +++
2 files changed, 37 insertions(+), 5 deletions(-)
diff --git a/drivers/soc/mediatek/mtk-pm-domains.c b/drivers/soc/mediatek/mtk-pm-domains.c
index 5d10a363e435..a9ac79e5c295 100644
--- a/drivers/soc/mediatek/mtk-pm-domains.c
+++ b/drivers/soc/mediatek/mtk-pm-domains.c
@@ -44,6 +44,7 @@ struct scpsys_domain {
struct clk_bulk_data *clks;
int num_subsys_clks;
struct clk_bulk_data *subsys_clks;
+ struct regmap *infracfg_nao;
struct regmap *infracfg;
struct regmap *smi;
struct regulator *supply;
@@ -127,13 +128,26 @@ static struct regmap *scpsys_bus_protect_get_regmap(struct scpsys_domain *pd,
return pd->infracfg;
}
+static struct regmap *scpsys_bus_protect_get_sta_regmap(struct scpsys_domain *pd,
+ const struct scpsys_bus_prot_data *bpd)
+{
+ if (bpd->flags & BUS_PROT_STA_COMPONENT_INFRA_NAO)
+ return pd->infracfg_nao;
+ else
+ return scpsys_bus_protect_get_regmap(pd, bpd);
+}
+
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);
u32 sta_mask = bpd->bus_prot_sta_mask;
+ u32 expected_ack;
u32 val;
+ expected_ack = (bpd->flags & BUS_PROT_STA_COMPONENT_INFRA_NAO ? sta_mask : 0);
+
if (bpd->flags & BUS_PROT_REG_UPDATE)
regmap_clear_bits(regmap, bpd->bus_prot_clr, bpd->bus_prot_set_clr_mask);
else
@@ -142,14 +156,15 @@ static int scpsys_bus_protect_clear(struct scpsys_domain *pd,
if (bpd->flags & BUS_PROT_IGNORE_CLR_ACK)
return 0;
- return regmap_read_poll_timeout(regmap, bpd->bus_prot_sta,
- val, !(val & sta_mask),
+ return regmap_read_poll_timeout(sta_regmap, bpd->bus_prot_sta,
+ val, (val & sta_mask) == expected_ack,
MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
}
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);
u32 sta_mask = bpd->bus_prot_sta_mask;
u32 val;
@@ -159,7 +174,7 @@ static int scpsys_bus_protect_set(struct scpsys_domain *pd,
else
regmap_write(regmap, bpd->bus_prot_set, bpd->bus_prot_set_clr_mask);
- return regmap_read_poll_timeout(regmap, bpd->bus_prot_sta,
+ return regmap_read_poll_timeout(sta_regmap, bpd->bus_prot_sta,
val, (val & sta_mask) == sta_mask,
MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
}
@@ -173,7 +188,10 @@ static int scpsys_bus_protect_enable(struct scpsys_domain *pd)
if (!bpd->bus_prot_set_clr_mask)
break;
- ret = scpsys_bus_protect_set(pd, bpd);
+ if (bpd->flags & BUS_PROT_INVERTED)
+ ret = scpsys_bus_protect_clear(pd, bpd);
+ else
+ ret = scpsys_bus_protect_set(pd, bpd);
if (ret)
return ret;
}
@@ -190,7 +208,10 @@ static int scpsys_bus_protect_disable(struct scpsys_domain *pd)
if (!bpd->bus_prot_set_clr_mask)
continue;
- ret = scpsys_bus_protect_clear(pd, bpd);
+ if (bpd->flags & BUS_PROT_INVERTED)
+ ret = scpsys_bus_protect_set(pd, bpd);
+ else
+ ret = scpsys_bus_protect_clear(pd, bpd);
if (ret)
return ret;
}
@@ -377,6 +398,14 @@ generic_pm_domain *scpsys_add_one_domain(struct scpsys *scpsys, struct device_no
return ERR_CAST(pd->smi);
}
+ if (MTK_SCPD_CAPS(pd, MTK_SCPD_HAS_INFRA_NAO)) {
+ pd->infracfg_nao = syscon_regmap_lookup_by_phandle(node, "mediatek,infracfg-nao");
+ if (IS_ERR(pd->infracfg_nao))
+ return ERR_CAST(pd->infracfg_nao);
+ } else {
+ pd->infracfg_nao = NULL;
+ }
+
num_clks = of_clk_get_parent_count(node);
if (num_clks > 0) {
/* Calculate number of subsys_clks */
diff --git a/drivers/soc/mediatek/mtk-pm-domains.h b/drivers/soc/mediatek/mtk-pm-domains.h
index 209f68dcaeac..17c033217704 100644
--- a/drivers/soc/mediatek/mtk-pm-domains.h
+++ b/drivers/soc/mediatek/mtk-pm-domains.h
@@ -11,6 +11,7 @@
/* can't set MTK_SCPD_KEEP_DEFAULT_OFF at the same time */
#define MTK_SCPD_ALWAYS_ON BIT(5)
#define MTK_SCPD_EXT_BUCK_ISO BIT(6)
+#define MTK_SCPD_HAS_INFRA_NAO BIT(7)
#define MTK_SCPD_CAPS(_scpd, _x) ((_scpd)->data->caps & (_x))
#define SPM_VDE_PWR_CON 0x0210
@@ -45,8 +46,10 @@
enum scpsys_bus_prot_flags {
BUS_PROT_REG_UPDATE = BIT(1),
BUS_PROT_IGNORE_CLR_ACK = BIT(2),
+ BUS_PROT_INVERTED = BIT(3),
BUS_PROT_COMPONENT_INFRA = BIT(4),
BUS_PROT_COMPONENT_SMI = BIT(5),
+ BUS_PROT_STA_COMPONENT_INFRA_NAO = BIT(6),
};
#define _BUS_PROT(_set_clr_mask, _set, _clr, _sta_mask, _sta, _flags) { \
--
2.40.1
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