linux-kernel - [PATCH v3 2/3] clk: qcom: gcc-sc7180: Update the .pwrsts for usb gdsc

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Date:   Tue, 20 Sep 2022 16:45:16 +0530
From:   Rajendra Nayak <quic_rjendra@...cinc.com>
To:     <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...ainline.org>, <mturquette@...libre.com>,
        <sboyd@...nel.org>, <mka@...omium.org>
CC:     <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <johan+linaro@...nel.org>, <quic_kriskura@...cinc.com>,
        <dianders@...omium.org>, <linux-clk@...r.kernel.org>,
        <angelogioacchino.delregno@...labora.com>,
        Rajendra Nayak <quic_rjendra@...cinc.com>
Subject: [PATCH v3 2/3] clk: qcom: gcc-sc7180: Update the .pwrsts for usb gdsc

The USB controller on sc7180 does not retain the state when
the system goes into low power state and the GDSC is
turned off. This results in the controller reinitializing and
re-enumerating all the connected devices (resulting in additional
delay while coming out of suspend)
Fix this by updating the .pwrsts for the USB GDSC so it only
transitions to retention state in low power.
Since sc7180 only supports cx (parent of usb gdsc) Retention, there
are no cxcs offsets mentioned in order to support the Retention
state.

Signed-off-by: Rajendra Nayak <quic_rjendra@...cinc.com>
---
v3:
Updated the changelog

 drivers/clk/qcom/gcc-sc7180.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/qcom/gcc-sc7180.c b/drivers/clk/qcom/gcc-sc7180.c
index c2ea09945c47..2d3980251e78 100644
--- a/drivers/clk/qcom/gcc-sc7180.c
+++ b/drivers/clk/qcom/gcc-sc7180.c
@@ -2224,7 +2224,7 @@ static struct gdsc usb30_prim_gdsc = {
 	.pd = {
 		.name = "usb30_prim_gdsc",
 	},
-	.pwrsts = PWRSTS_OFF_ON,
+	.pwrsts = PWRSTS_RET_ON,
 };
 
 static struct gdsc hlos1_vote_mmnoc_mmu_tbu_hf0_gdsc = {
-- 
2.17.1