netdev - [PATCH 1/4] clk: qcom: branch: Extend the invert logic for branch2 clocks

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Message-ID: <20230419133013.2563-2-quic_tdas@quicinc.com>
Date:   Wed, 19 Apr 2023 19:00:10 +0530
From:   Taniya Das <quic_tdas@...cinc.com>
To:     Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        "Bjorn Andersson" <andersson@...nel.org>,
        Andy Gross <agross@...nel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
        Richard Cochran <richardcochran@...il.com>,
        Michael Turquette <mturquette@...libre.com>
CC:     <quic_skakitap@...cinc.com>,
        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>,
        Taniya Das <quic_tdas@...cinc.com>,
        <quic_rohiagar@...cinc.com>, <netdev@...r.kernel.org>
Subject: [PATCH 1/4] 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>
---
 drivers/clk/qcom/clk-branch.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/clk/qcom/clk-branch.c b/drivers/clk/qcom/clk-branch.c
index f869fc6aaed6..4b24d45be771 100644
--- a/drivers/clk/qcom/clk-branch.c
+++ b/drivers/clk/qcom/clk-branch.c
@@ -48,6 +48,7 @@ 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 = BRANCH_NOC_FSM_STATUS_MASK << BRANCH_NOC_FSM_STATUS_SHIFT;
 	mask |= BRANCH_CLK_OFF;
@@ -56,9 +57,16 @@ static bool clk_branch2_check_halt(const struct clk_branch *br, bool enabling)
 
 	if (enabling) {
 		val &= mask;
+
+		if (invert)
+			return (val & BRANCH_CLK_OFF) == BRANCH_CLK_OFF;
+
 		return (val & BRANCH_CLK_OFF) == 0 ||
 			val == BRANCH_NOC_FSM_STATUS_ON;
 	} else {
+		if (invert)
+			return (val & BRANCH_CLK_OFF) == 0;
+
 		return val & BRANCH_CLK_OFF;
 	}
 }
-- 
2.17.1