clk: qcom: camcc-sm8450: Specify Titan GDSC power domain as a parent to IPE/BPS/SBI

When a consumer turns on/off a power domain dependent on another power
domain in hardware, the parent power domain shall be turned on/off by
the power domain provider as well, and to get it the power domain hardware
hierarchy shall be described in the CAMCC driver.

Establish the power domain hierarchy with a Titan GDSC set as a parent of
other GDSC power domains provided by the SM8450 camera clock controller,
including IPE, BPS and SBI ones.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Reviewed-by: Imran Shaik <imran.shaik@oss.qualcomm.com>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Link: https://lore.kernel.org/r/20251021234450.2271279-7-vladimir.zapolskiy@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

drivers/clk/qcom/camcc-sm8450.c

@@ -2935,6 +2935,7 @@ static struct gdsc bps_gdsc = {
 		.name = "bps_gdsc",
 	},
 	.flags = HW_CTRL | POLL_CFG_GDSCR,
+	.parent = &titan_top_gdsc.pd,
 	.pwrsts = PWRSTS_OFF_ON,
 };
 
@@ -2944,6 +2945,7 @@ static struct gdsc ipe_0_gdsc = {
 		.name = "ipe_0_gdsc",
 	},
 	.flags = HW_CTRL | POLL_CFG_GDSCR,
+	.parent = &titan_top_gdsc.pd,
 	.pwrsts = PWRSTS_OFF_ON,
 };
 
@@ -2953,6 +2955,7 @@ static struct gdsc sbi_gdsc = {
 		.name = "sbi_gdsc",
 	},
 	.flags = POLL_CFG_GDSCR,
+	.parent = &titan_top_gdsc.pd,
 	.pwrsts = PWRSTS_OFF_ON,
 };