linux-kernel - [PATCH] clk: BD718x7: Do not depend on parent driver data

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Message-ID: <20210105123028.GA3409663@localhost.localdomain>
Date:   Tue, 5 Jan 2021 14:47:54 +0200
From:   Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
To:     matti.vaittinen@...rohmeurope.com, mazziesaccount@...il.com
Cc:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, linux-power@...rohmeurope.com,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] clk: BD718x7: Do not depend on parent driver data

The bd718x7 only needs a regmap from parent device. This can be
obtained by call to dev_get_regmap. Do not require parent to
populate the driver data for this.

Signed-off-by: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
---
 drivers/clk/clk-bd718x7.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/clk/clk-bd718x7.c b/drivers/clk/clk-bd718x7.c
index b52e8d6f660c..17d90e09f1c0 100644
--- a/drivers/clk/clk-bd718x7.c
+++ b/drivers/clk/clk-bd718x7.c
@@ -31,12 +31,12 @@ struct bd718xx_clk {
 	u8 reg;
 	u8 mask;
 	struct platform_device *pdev;
-	struct rohm_regmap_dev *mfd;
+	struct regmap *regmap;
 };
 
 static int bd71837_clk_set(struct bd718xx_clk *c, unsigned int status)
 {
-	return regmap_update_bits(c->mfd->regmap, c->reg, c->mask, status);
+	return regmap_update_bits(c->regmap, c->reg, c->mask, status);
 }
 
 static void bd71837_clk_disable(struct clk_hw *hw)
@@ -62,7 +62,7 @@ static int bd71837_clk_is_enabled(struct clk_hw *hw)
 	int rval;
 	struct bd718xx_clk *c = container_of(hw, struct bd718xx_clk, hw);
 
-	rval = regmap_read(c->mfd->regmap, c->reg, &enabled);
+	rval = regmap_read(c->regmap, c->reg, &enabled);
 
 	if (rval)
 		return rval;
@@ -82,7 +82,6 @@ static int bd71837_clk_probe(struct platform_device *pdev)
 	int rval = -ENOMEM;
 	const char *parent_clk;
 	struct device *parent = pdev->dev.parent;
-	struct rohm_regmap_dev *mfd = dev_get_drvdata(parent);
 	struct clk_init_data init = {
 		.name = "bd718xx-32k-out",
 		.ops = &bd71837_clk_ops,
@@ -93,6 +92,10 @@ static int bd71837_clk_probe(struct platform_device *pdev)
 	if (!c)
 		return -ENOMEM;
 
+	c->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!c->regmap)
+		return -ENODEV;
+
 	init.num_parents = 1;
 	parent_clk = of_clk_get_parent_name(parent->of_node, 0);
 
@@ -119,7 +122,6 @@ static int bd71837_clk_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev, "Unknown clk chip\n");
 		return -EINVAL;
 	}
-	c->mfd = mfd;
 	c->pdev = pdev;
 	c->hw.init = &init;
 
-- 
2.25.4


-- 
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =]