linux-kernel - [PATCH 2/5] clk: qcom: Allow custom reset ops

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Message-ID: <20220730144713.2.I4b69f984a97535179acd9637426a1331f84f6646@changeid>
Date:   Sat, 30 Jul 2022 14:47:41 +0530
From:   Akhil P Oommen <quic_akhilpo@...cinc.com>
To:     freedreno <freedreno@...ts.freedesktop.org>,
        <dri-devel@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>,
        Rob Clark <robdclark@...il.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        "Stephen Boyd" <swboyd@...omium.org>
CC:     Douglas Anderson <dianders@...omium.org>,
        Akhil P Oommen <quic_akhilpo@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Michael Turquette <mturquette@...libre.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Stephen Boyd <sboyd@...nel.org>, <linux-clk@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/5] clk: qcom: Allow custom reset ops

Add support to allow soc specific clk drivers to specify a custom reset
operation. A consumer-driver of the reset framework can call
"reset_control_reset()" api to trigger this.

Signed-off-by: Akhil P Oommen <quic_akhilpo@...cinc.com>
---

 drivers/clk/qcom/reset.c | 6 ++++++
 drivers/clk/qcom/reset.h | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/drivers/clk/qcom/reset.c b/drivers/clk/qcom/reset.c
index 819d194..4782bf1 100644
--- a/drivers/clk/qcom/reset.c
+++ b/drivers/clk/qcom/reset.c
@@ -13,6 +13,12 @@
 
 static int qcom_reset(struct reset_controller_dev *rcdev, unsigned long id)
 {
+	struct qcom_reset_controller *rst = to_qcom_reset_controller(rcdev);
+	const struct qcom_reset_map *map = &rst->reset_map[id];
+
+	if (map->op)
+		return map->op(map);
+
 	rcdev->ops->assert(rcdev, id);
 	udelay(1);
 	rcdev->ops->deassert(rcdev, id);
diff --git a/drivers/clk/qcom/reset.h b/drivers/clk/qcom/reset.h
index 2a08b5e..295deeb 100644
--- a/drivers/clk/qcom/reset.h
+++ b/drivers/clk/qcom/reset.h
@@ -11,6 +11,8 @@
 struct qcom_reset_map {
 	unsigned int reg;
 	u8 bit;
+	int (*op)(const struct qcom_reset_map *map);
+	void *priv;
 };
 
 struct regmap;
-- 
2.7.4