linux-kernel - [RFC PATCH 2/3] clk: bd718x7: Enable the possibility to mark the clock as critical

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Date:   Sun,  5 Jun 2022 18:57:02 +0200
From:   Michael Trimarchi <michael@...rulasolutions.com>
To:     Matti Vaittinen <mazziesaccount@...il.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        linux-clk@...r.kernel.org (open list:COMMON CLK FRAMEWORK),
        linux-kernel@...r.kernel.org (open list)
Cc:     Dario Binacchi <dario.binacchi@...rulasolutions.com>,
        linux-amarula@...rulasolutions.com,
        linux-clk@...r.kernel.org (open list:COMMON CLK FRAMEWORK),
        linux-kernel@...r.kernel.org (open list)
Subject: [RFC PATCH 2/3] clk: bd718x7: Enable the possibility to mark the clock as critical

If the clock is used to generate the osc_32k, we need to mark
as critical. clock-critical has no binding description at the moment
but it's defined in linux kernel

bd71847: pmic@4b {
...
	rohm,reset-snvs-powered;

	#clock-cells = <0>;
	clock-critical = <1>;
	clocks = <&osc_32k 0>;
	clock-output-names = "clk-32k-out";
...
}

Signed-off-by: Michael Trimarchi <michael@...rulasolutions.com>
---
 drivers/clk/clk-bd718x7.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/clk/clk-bd718x7.c b/drivers/clk/clk-bd718x7.c
index 04cc0beb67df..5088379ec2b7 100644
--- a/drivers/clk/clk-bd718x7.c
+++ b/drivers/clk/clk-bd718x7.c
@@ -83,6 +83,7 @@ static int bd71837_clk_probe(struct platform_device *pdev)
 	const char *parent_clk;
 	struct device *dev = &pdev->dev;
 	struct device *parent = pdev->dev.parent;
+	unsigned long flags;
 	struct clk_init_data init = {
 		.name = "bd718xx-32k-out",
 		.ops = &bd71837_clk_ops,
@@ -100,6 +101,9 @@ static int bd71837_clk_probe(struct platform_device *pdev)
 
 	parent_clk = of_clk_get_parent_name(parent->of_node, 0);
 
+	of_clk_detect_critical(dev->of_node, 0, &flags);
+	init.flags = flags;
+
 	init.parent_names = &parent_clk;
 	if (!parent_clk) {
 		dev_err(dev, "No parent clk found\n");
-- 
2.25.1