[PATCH v2 09/12] soc: mediatek: pm-domains: Allow bus protection to ignore clear ack

[Enric Balletbo i Serra]

From: Matthias Brugger <mbrug...@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 <mbrug...@suse.com>
Signed-off-by: Enric Balletbo i Serra <enric.balle...@collabora.com>
---

Changes in v2: None

 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 2075072f16da..0222be12d0df 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
@@ -267,6 +272,9 @@ 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