pwm: mediatek: Remove the has_clks field

We can use fixed clocks to repair mt7628 PWM during configure from
userspace. The SoC is legacy MIPS and has no complex clock tree. Because
we can get the clock frequency for period calculation from fixed clocks
specified in DT, we can remove the has_clock field, and directly use
devm_clk_get() and clk_get_rate().
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Sam Shih <sam.shih@mediatek.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

drivers/pwm/pwm-mediatek.c

@@ -57,7 +57,6 @@ static const char * const mtk_pwm_clk_name[MTK_CLK_MAX] = {
 struct mtk_pwm_platform_data {
 	unsigned int num_pwms;
 	bool pwm45_fixup;
-	bool has_clks;
 };
 
 /**
@@ -87,9 +86,6 @@ static int mtk_pwm_clk_enable(struct pwm_chip *chip, struct pwm_device *pwm)
 	struct mtk_pwm_chip *pc = to_mtk_pwm_chip(chip);
 	int ret;
 
-	if (!pc->soc->has_clks)
-		return 0;
-
 	ret = clk_prepare_enable(pc->clks[MTK_CLK_TOP]);
 	if (ret < 0)
 		return ret;
@@ -116,9 +112,6 @@ static void mtk_pwm_clk_disable(struct pwm_chip *chip, struct pwm_device *pwm)
 {
 	struct mtk_pwm_chip *pc = to_mtk_pwm_chip(chip);
 
-	if (!pc->soc->has_clks)
-		return;
-
 	clk_disable_unprepare(pc->clks[MTK_CLK_PWM1 + pwm->hwpwm]);
 	clk_disable_unprepare(pc->clks[MTK_CLK_MAIN]);
 	clk_disable_unprepare(pc->clks[MTK_CLK_TOP]);
@@ -242,7 +235,7 @@ static int mtk_pwm_probe(struct platform_device *pdev)
 	if (IS_ERR(pc->regs))
 		return PTR_ERR(pc->regs);
 
-	for (i = 0; i < pc->soc->num_pwms + 2 && pc->soc->has_clks; i++) {
+	for (i = 0; i < pc->soc->num_pwms + 2; 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",
@@ -277,31 +270,26 @@ 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 mtk_pwm_platform_data mt8516_pwm_data = {
 	.num_pwms = 5,
 	.pwm45_fixup = false,
-	.has_clks = true,
 };
 
 static const struct of_device_id mtk_pwm_of_match[] = {