This is a note to let you know that I've just added the patch titled
bus: ti-sysc: Fix SYSC_QUIRK_SWSUP_SIDLE_ACT handling for uart wake-up
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bus-ti-sysc-fix-sysc_quirk_swsup_sidle_act-handling-.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7ce13a962b979700d0065a8ef490843e93827f2c
Author: Tony Lindgren <tony@xxxxxxxxxxx>
Date: Thu Sep 7 08:53:28 2023 +0300
bus: ti-sysc: Fix SYSC_QUIRK_SWSUP_SIDLE_ACT handling for uart wake-up
[ Upstream commit e5deb8f76e64d94ccef715e75ebafffd0c312d80 ]
The uarts should be tagged with SYSC_QUIRK_SWSUP_SIDLE instead of
SYSC_QUIRK_SWSUP_SIDLE_ACT. The difference is that SYSC_QUIRK_SWSUP_SIDLE
is used to force idle target modules rather than block idle during usage.
The SYSC_QUIRK_SWSUP_SIDLE_ACT should disable autoidle and wake-up when
a target module is active, and configure autoidle and wake-up when a
target module is inactive. We are missing configuring the target module
on sysc_disable_module(), and missing toggling of the wake-up bit.
Let's fix the issue to allow uart wake-up to work.
Fixes: fb685f1c190e ("bus: ti-sysc: Handle swsup idle mode quirks")
Tested-by: Dhruva Gole <d-gole@xxxxxx>
Tested-by: Kevin Hilman <khilman@xxxxxxxxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index 8b0fe4b7b9c19..0a159989c899a 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -1118,6 +1118,11 @@ static int sysc_enable_module(struct device *dev)
if (ddata->cfg.quirks & (SYSC_QUIRK_SWSUP_SIDLE |
SYSC_QUIRK_SWSUP_SIDLE_ACT)) {
best_mode = SYSC_IDLE_NO;
+
+ /* Clear WAKEUP */
+ if (regbits->enwkup_shift >= 0 &&
+ ddata->cfg.sysc_val & BIT(regbits->enwkup_shift))
+ reg &= ~BIT(regbits->enwkup_shift);
} else {
best_mode = fls(ddata->cfg.sidlemodes) - 1;
if (best_mode > SYSC_IDLE_MASK) {
@@ -1238,6 +1243,13 @@ static int sysc_disable_module(struct device *dev)
}
}
+ if (ddata->cfg.quirks & SYSC_QUIRK_SWSUP_SIDLE_ACT) {
+ /* Set WAKEUP */
+ if (regbits->enwkup_shift >= 0 &&
+ ddata->cfg.sysc_val & BIT(regbits->enwkup_shift))
+ reg |= BIT(regbits->enwkup_shift);
+ }
+
reg &= ~(SYSC_IDLE_MASK << regbits->sidle_shift);
reg |= best_mode << regbits->sidle_shift;
if (regbits->autoidle_shift >= 0 &&
@@ -1497,16 +1509,16 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
SYSC_QUIRK("sham", 0, 0x100, 0x110, 0x114, 0x40000c03, 0xffffffff,
SYSC_QUIRK_LEGACY_IDLE),
SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000046, 0xffffffff,
- SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
+ SYSC_QUIRK_SWSUP_SIDLE_ACT | SYSC_QUIRK_LEGACY_IDLE),
SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000052, 0xffffffff,
- SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
+ SYSC_QUIRK_SWSUP_SIDLE_ACT | SYSC_QUIRK_LEGACY_IDLE),
/* Uarts on omap4 and later */
SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x50411e03, 0xffff00ff,
- SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
+ SYSC_QUIRK_SWSUP_SIDLE_ACT | SYSC_QUIRK_LEGACY_IDLE),
SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x47422e03, 0xffffffff,
- SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
+ SYSC_QUIRK_SWSUP_SIDLE_ACT | SYSC_QUIRK_LEGACY_IDLE),
SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x47424e03, 0xffffffff,
- SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
+ SYSC_QUIRK_SWSUP_SIDLE_ACT | SYSC_QUIRK_LEGACY_IDLE),
/* Quirks that need to be set based on the module address */
SYSC_QUIRK("mcpdm", 0x40132000, 0, 0x10, -ENODEV, 0x50000800, 0xffffffff,
