linux-kernel - [PATCH 1/5] pwm: mediatek: add a property "mediatek,num-pwms"

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Message-ID: <0c400cb1899c1afb4c9f021350cdc0c6ca3f6239.1547453586.git.ryder.lee@mediatek.com>
Date:   Mon, 14 Jan 2019 16:21:20 +0800
From:   Ryder Lee <ryder.lee@...iatek.com>
To:     Thierry Reding <thierry.reding@...il.com>
CC:     Matthias Brugger <matthias.bgg@...il.com>,
        Sean Wang <sean.wang@...nel.org>,
        Weijie Gao <weijie.gao@...iatek.com>,
        <linux-pwm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        Ryder Lee <ryder.lee@...iatek.com>
Subject: [PATCH 1/5] pwm: mediatek: add a property "mediatek,num-pwms"

This adds a property "mediatek,num-pwms" to avoid having an endless
list of compatibles with no other differences for the same driver.

Signed-off-by: Ryder Lee <ryder.lee@...iatek.com>
---
 drivers/pwm/pwm-mediatek.c | 25 +++++++++++--------------
 1 file changed, 11 insertions(+), 14 deletions(-)

diff --git a/drivers/pwm/pwm-mediatek.c b/drivers/pwm/pwm-mediatek.c
index eb6674c..37daa84 100644
--- a/drivers/pwm/pwm-mediatek.c
+++ b/drivers/pwm/pwm-mediatek.c
@@ -55,7 +55,6 @@ enum {
 };
 
 struct mtk_pwm_platform_data {
-	unsigned int num_pwms;
 	bool pwm45_fixup;
 	bool has_clks;
 };
@@ -226,10 +225,11 @@ static void mtk_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
 
 static int mtk_pwm_probe(struct platform_device *pdev)
 {
+	struct device_node *np = pdev->dev.of_node;
 	const struct mtk_pwm_platform_data *data;
 	struct mtk_pwm_chip *pc;
 	struct resource *res;
-	unsigned int i;
+	unsigned int i, num_pwms;
 	int ret;
 
 	pc = devm_kzalloc(&pdev->dev, sizeof(*pc), GFP_KERNEL);
@@ -246,7 +246,13 @@ static int mtk_pwm_probe(struct platform_device *pdev)
 	if (IS_ERR(pc->regs))
 		return PTR_ERR(pc->regs);
 
-	for (i = 0; i < data->num_pwms + 2 && pc->soc->has_clks; i++) {
+	ret = of_property_read_u32(np, "mediatek,num-pwms", &num_pwms);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to get pwm number: %d\n", ret);
+		return ret;
+	}
+
+	for (i = 0; i < num_pwms + 2 && pc->soc->has_clks; i++) {
 		pc->clks[i] = devm_clk_get(&pdev->dev, mtk_pwm_clk_name[i]);
 		if (IS_ERR(pc->clks[i])) {
 			dev_err(&pdev->dev, "clock: %s fail: %ld\n",
@@ -260,7 +266,7 @@ static int mtk_pwm_probe(struct platform_device *pdev)
 	pc->chip.dev = &pdev->dev;
 	pc->chip.ops = &mtk_pwm_ops;
 	pc->chip.base = -1;
-	pc->chip.npwm = data->num_pwms;
+	pc->chip.npwm = num_pwms;
 
 	ret = pwmchip_add(&pc->chip);
 	if (ret < 0) {
@@ -279,32 +285,23 @@ static int mtk_pwm_remove(struct platform_device *pdev)
 }
 
 static const struct mtk_pwm_platform_data mt2712_pwm_data = {
-	.num_pwms = 8,
-	.pwm45_fixup = false,
-	.has_clks = true,
-};
-
-static const struct mtk_pwm_platform_data mt7622_pwm_data = {
-	.num_pwms = 6,
 	.pwm45_fixup = false,
 	.has_clks = true,
 };
 
 static const struct mtk_pwm_platform_data mt7623_pwm_data = {
-	.num_pwms = 5,
 	.pwm45_fixup = true,
 	.has_clks = true,
 };
 
 static const struct mtk_pwm_platform_data mt7628_pwm_data = {
-	.num_pwms = 4,
 	.pwm45_fixup = true,
 	.has_clks = false,
 };
 
 static const struct of_device_id mtk_pwm_of_match[] = {
 	{ .compatible = "mediatek,mt2712-pwm", .data = &mt2712_pwm_data },
-	{ .compatible = "mediatek,mt7622-pwm", .data = &mt7622_pwm_data },
+	{ .compatible = "mediatek,mt7622-pwm", .data = &mt2712_pwm_data },
 	{ .compatible = "mediatek,mt7623-pwm", .data = &mt7623_pwm_data },
 	{ .compatible = "mediatek,mt7628-pwm", .data = &mt7628_pwm_data },
 	{ },
-- 
1.9.1