On 12.09.2026 10:23, Reza Kurniawan via groups.io wrote:
Some SoCs such as MSM8917 poll its GDSC power domains by reading GDSCR
directly, as opposed to GDSCR + CFG_GDSCR_OFFSET.
Add a poll_gdscr flag to struct qcom_power_map to facilitate those SoCs.
Signed-off-by: Reza Kurniawan <[email protected]>
Reviewed-by: Balaji Selvanathan <[email protected]>
---
(no changes since v1)
drivers/clk/qcom/clock-qcom.c | 24 +++++++++++++-----------
drivers/clk/qcom/clock-qcom.h | 1 +
2 files changed, 14 insertions(+), 11 deletions(-)
diff --git a/drivers/clk/qcom/clock-qcom.c b/drivers/clk/qcom/clock-qcom.c
index 6b46d9db7..754ff4ff4 100644
--- a/drivers/clk/qcom/clock-qcom.c
+++ b/drivers/clk/qcom/clock-qcom.c
@@ -505,9 +505,9 @@ U_BOOT_DRIVER(qcom_reset) = {
static int qcom_power_set(struct power_domain *pwr, bool on)
{
struct msm_clk_data *data = (struct msm_clk_data
*)dev_get_driver_data(pwr->dev);
- void __iomem *base = dev_get_priv(pwr->dev);
+ void __iomem *base = dev_get_priv(pwr->dev), *poll_addr;
const struct qcom_power_map *map;
- u32 value;
+ u32 value, mask;
int ret;
if (pwr->id >= data->num_power_domains)
@@ -527,19 +527,21 @@ static int qcom_power_set(struct power_domain *pwr, bool
on)
writel(value, base + map->reg);
- if (on)
- ret = readl_poll_timeout(base + map->reg + CFG_GDSCR_OFFSET,
+ poll_addr = base + map->reg;
+ if (map->poll_gdscr) {
+ /* Some SOCs such as MSM8917 poll at GDSCR */
+ ret = readl_poll_timeout(poll_addr,
value,
- (value & GDSC_POWER_UP_COMPLETE) ||
- (value & GDSC_PWR_ON_MASK),
+ (!!(value & GDSC_PWR_ON_MASK) == on),
GDSC_STATUS_POLL_TIMEOUT_US);
-
- else
- ret = readl_poll_timeout(base + map->reg + CFG_GDSCR_OFFSET,
+ } else {
+ mask = on ? GDSC_POWER_UP_COMPLETE : GDSC_POWER_DOWN_COMPLETE;
+ ret = readl_poll_timeout(poll_addr + CFG_GDSCR_OFFSET,
value,
- (value & GDSC_POWER_DOWN_COMPLETE) ||
- !(value & GDSC_PWR_ON_MASK),
+ (value & mask) ||
+ !!(value & GDSC_PWR_ON_MASK) == on,
GDSC_STATUS_POLL_TIMEOUT_US);
+ }
if (ret == -ETIMEDOUT)
printf("WARNING: GDSC %lu is stuck during power on/off\n",
diff --git a/drivers/clk/qcom/clock-qcom.h b/drivers/clk/qcom/clock-qcom.h
index 3a4550d85..0b514cc1f 100644
--- a/drivers/clk/qcom/clock-qcom.h
+++ b/drivers/clk/qcom/clock-qcom.h
@@ -76,6 +76,7 @@ struct qcom_reset_map {
struct qcom_power_map {
unsigned int reg;
+ bool poll_gdscr;
};
struct clk;
Hi,
It's doing the same as the patch that was already posted, right? [1]
Sadly it got no reviews, which kind of demotivates any further
contributions to u-boot/qcom.
[1]
https://lore.kernel.org/u-boot/[email protected]/
--
Regards,
Alexey Minnekhanov
