linux-kernel - [PATCH V2 1/5] clk: qcom: branch: Extend the invert logic for branch2 clocks

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Message-ID: <20230512122347.1219-2-quic_tdas@quicinc.com>
Date:   Fri, 12 May 2023 17:53:43 +0530
From:   Taniya Das <quic_tdas@...cinc.com>
To:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Richard Cochran <richardcochran@...il.com>,
        Conor Dooley <conor+dt@...nel.org>,
        Andy Gross <agross@...nel.org>
CC:     Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Imran Shaik <quic_imrashai@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <netdev@...r.kernel.org>, <jkona@...cinc.com>,
        <quic_rohiagar@...cinc.com>, Taniya Das <quic_tdas@...cinc.com>
Subject: [PATCH V2 1/5] clk: qcom: branch: Extend the invert logic for branch2 clocks

From: Imran Shaik <quic_imrashai@...cinc.com>

Add support to handle the invert logic for branch2 clocks.
Invert branch halt would indicate the clock ON when CLK_OFF
bit is '1' and OFF when CLK_OFF bit is '0'.

Signed-off-by: Imran Shaik <quic_imrashai@...cinc.com>
Signed-off-by: Taniya Das <quic_tdas@...cinc.com>
---
Changes since v1:
 - Removed the multiple returns from inside clk_branch2_check_halt.

 drivers/clk/qcom/clk-branch.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/clk/qcom/clk-branch.c b/drivers/clk/qcom/clk-branch.c
index ca896ebf7e1b..fc4735f74f0f 100644
--- a/drivers/clk/qcom/clk-branch.c
+++ b/drivers/clk/qcom/clk-branch.c
@@ -43,6 +43,7 @@ static bool clk_branch2_check_halt(const struct clk_branch *br, bool enabling)
 {
 	u32 val;
 	u32 mask;
+	bool invert = (br->halt_check == BRANCH_HALT_ENABLE);
 
 	mask = CBCR_NOC_FSM_STATUS;
 	mask |= CBCR_CLK_OFF;
@@ -51,11 +52,10 @@ static bool clk_branch2_check_halt(const struct clk_branch *br, bool enabling)
 
 	if (enabling) {
 		val &= mask;
-		return (val & CBCR_CLK_OFF) == 0 ||
+		return (val & CBCR_CLK_OFF) == (invert ? CBCR_CLK_OFF : 0) ||
 			FIELD_GET(CBCR_NOC_FSM_STATUS, val) == FSM_STATUS_ON;
-	} else {
-		return val & CBCR_CLK_OFF;
 	}
+	return (val & CBCR_CLK_OFF) == (invert ? 0 : CBCR_CLK_OFF);
 }
 
 static int clk_branch_wait(const struct clk_branch *br, bool enabling,
-- 
2.17.1