[PATCH 09/12] soc: mediatek: pm-domains: Allow bus protection to ignore clear ack

Enric Balletbo i Serra
2020-09-10T17:35:29Z

From: Matthias Brugger <mbrugger@suse.com>

In some cases the hardware does not create an acknowledgment of the
bus protection clearing. Add a flag to the bus protection indicating
that a clear event will be ignored.

Signed-off-by: Matthias Brugger <mbrugger@suse.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
---

drivers/soc/mediatek/mtk-pm-domains.c | 26 +++++++++++++++++---------
1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/drivers/soc/mediatek/mtk-pm-domains.c b/drivers/soc/mediatek/mtk-pm-domains.c
index 52a93a87e313..29e88adc8ea6 100644
--- a/drivers/soc/mediatek/mtk-pm-domains.c
+++ b/drivers/soc/mediatek/mtk-pm-domains.c
@@ -60,19 +60,23 @@

#define SPM_MAX_BUS_PROT_DATA 3

-#define _BUS_PROT(_mask, _set, _clr, _sta, _update) { \
- .bus_prot_mask = (_mask), \
- .bus_prot_set = _set, \
- .bus_prot_clr = _clr, \
- .bus_prot_sta = _sta, \
- .bus_prot_reg_update = _update, \
+#define _BUS_PROT(_mask, _set, _clr, _sta, _update, _ignore) { \
+ .bus_prot_mask = (_mask), \
+ .bus_prot_set = _set, \
+ .bus_prot_clr = _clr, \
+ .bus_prot_sta = _sta, \
+ .bus_prot_reg_update = _update, \
+ .ignore_clr_ack = _ignore, \
}

-#define BUS_PROT_WR(_mask, _set, _clr, _sta) \
- _BUS_PROT(_mask, _set, _clr, _sta, false)
+#define BUS_PROT_WR(_mask, _set, _clr, _sta) \
+ _BUS_PROT(_mask, _set, _clr, _sta, false, false)
+
+#define BUS_PROT_WR_IGN(_mask, _set, _clr, _sta) \
+ _BUS_PROT(_mask, _set, _clr, _sta, false, true)

#define BUS_PROT_UPDATE(_mask, _set, _clr, _sta) \
- _BUS_PROT(_mask, _set, _clr, _sta, true)
+ _BUS_PROT(_mask, _set, _clr, _sta, true, false)

struct scpsys_bus_prot_data {
u32 bus_prot_mask;
@@ -80,6 +84,7 @@ struct scpsys_bus_prot_data {
u32 bus_prot_clr;
u32 bus_prot_sta;
bool bus_prot_reg_update;
+ bool ignore_clr_ack;
};

#define MAX_SUBSYS_CLKS 10
@@ -257,6 +262,9 @@ static int _scpsys_bus_protect_disable(const struct scpsys_bus_prot_data *bpd,
else
regmap_write(regmap, bpd[i].bus_prot_clr, mask);

+ if (bpd[i].ignore_clr_ack)
+ continue;
+
ret = regmap_read_poll_timeout(regmap, bpd[i].bus_prot_sta,
val, !(val & mask),
MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
--
2.28.0