pwm: sophgo-sg2042: Reorganize the code structure

As the driver logic can be used in both SG2042 and SG2044, it
will be better to reorganize the code structure.

Reviewed-by: Chen Wang <[e-mail]>
Tested-by: Chen Wang <[e-mail]>
Signed-off-by: Longbin Li <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Uwe Kleine-König <[e-mail]>

drivers/pwm/pwm-sophgo-sg2042.c

···
 	unsigned long clk_rate_hz;
 };
 
+struct sg2042_chip_data {
+	const struct pwm_ops ops;
+};
+
 /*
  * period_ticks: PERIOD
  * hlperiod_ticks: HLPERIOD
···
 	writel(hlperiod_ticks, base + SG2042_PWM_HLPERIOD(chan));
 }
 
-static int pwm_sg2042_apply(struct pwm_chip *chip, struct pwm_device *pwm,
-			    const struct pwm_state *state)
+static void pwm_sg2042_set_dutycycle(struct pwm_chip *chip, struct pwm_device *pwm,
+				     const struct pwm_state *state)
 {
 	struct sg2042_pwm_ddata *ddata = pwmchip_get_drvdata(chip);
 	u32 hlperiod_ticks;
 	u32 period_ticks;
-
-	if (state->polarity == PWM_POLARITY_INVERSED)
-		return -EINVAL;
-
-	if (!state->enabled) {
-		pwm_sg2042_config(ddata, pwm->hwpwm, 0, 0);
-		return 0;
-	}
 
 	/*
 	 * Duration of High level (duty_cycle) = HLPERIOD x Period_of_input_clk
···
 		pwm->hwpwm, period_ticks, hlperiod_ticks);
 
 	pwm_sg2042_config(ddata, pwm->hwpwm, period_ticks, hlperiod_ticks);
+}
+
+static int pwm_sg2042_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+			    const struct pwm_state *state)
+{
+	struct sg2042_pwm_ddata *ddata = pwmchip_get_drvdata(chip);
+
+	if (state->polarity == PWM_POLARITY_INVERSED)
+		return -EINVAL;
+
+	if (!state->enabled) {
+		pwm_sg2042_config(ddata, pwm->hwpwm, 0, 0);
+		return 0;
+	}
+
+	pwm_sg2042_set_dutycycle(chip, pwm, state);
 
 	return 0;
 }
···
 	return 0;
 }
 
-static const struct pwm_ops pwm_sg2042_ops = {
-	.apply = pwm_sg2042_apply,
-	.get_state = pwm_sg2042_get_state,
+static const struct sg2042_chip_data sg2042_chip_data = {
+	.ops = {
+		.apply = pwm_sg2042_apply,
+		.get_state = pwm_sg2042_get_state,
+	},
 };
 
 static const struct of_device_id sg2042_pwm_ids[] = {
-	{ .compatible = "sophgo,sg2042-pwm" },
+	{
+		.compatible = "sophgo,sg2042-pwm",
+		.data = &sg2042_chip_data
+	},
 	{ }
 };
 MODULE_DEVICE_TABLE(of, sg2042_pwm_ids);
···
 static int pwm_sg2042_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
+	const struct sg2042_chip_data *chip_data;
 	struct sg2042_pwm_ddata *ddata;
 	struct reset_control *rst;
 	struct pwm_chip *chip;
 	struct clk *clk;
 	int ret;
+
+	chip_data = device_get_match_data(dev);
+	if (!chip_data)
+		return -ENODEV;
 
 	chip = devm_pwmchip_alloc(dev, SG2042_PWM_CHANNELNUM, sizeof(*ddata));
 	if (IS_ERR(chip))
···
 	if (IS_ERR(rst))
 		return dev_err_probe(dev, PTR_ERR(rst), "Failed to get reset\n");
 
-	chip->ops = &pwm_sg2042_ops;
+	chip->ops = &chip_data->ops;
 	chip->atomic = true;
 
 	ret = devm_pwmchip_add(dev, chip);