pwm: tegra: Rename variable pointing to driver private data

Status quo is that variables of type struct tegra_pwm_chip * are named
"pwm", "chip" or "pc". The two formers are all not optimal because
usually only struct pwm_device * variables are named "pwm" and "chip" is
usually used for variabled of type struct pwm_chip *.

So consistently use the same and non-conflicting name "pc".

Signed-off-by: Uwe Kleine-König <[e-mail]>
Signed-off-by: Thierry Reding <[e-mail]>

drivers/pwm/pwm-tegra.c

···
 	return container_of(chip, struct tegra_pwm_chip, chip);
 }
 
-static inline u32 pwm_readl(struct tegra_pwm_chip *chip, unsigned int num)
+static inline u32 pwm_readl(struct tegra_pwm_chip *pc, unsigned int offset)
 {
-	return readl(chip->regs + (num << 4));
+	return readl(pc->regs + (offset << 4));
 }
 
-static inline void pwm_writel(struct tegra_pwm_chip *chip, unsigned int num,
-			     unsigned long val)
+static inline void pwm_writel(struct tegra_pwm_chip *pc, unsigned int offset, u32 value)
 {
-	writel(val, chip->regs + (num << 4));
+	writel(value, pc->regs + (offset << 4));
 }
 
 static int tegra_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
···
 
 static int tegra_pwm_probe(struct platform_device *pdev)
 {
-	struct tegra_pwm_chip *pwm;
+	struct tegra_pwm_chip *pc;
 	int ret;
 
-	pwm = devm_kzalloc(&pdev->dev, sizeof(*pwm), GFP_KERNEL);
-	if (!pwm)
+	pc = devm_kzalloc(&pdev->dev, sizeof(*pc), GFP_KERNEL);
+	if (!pc)
 		return -ENOMEM;
 
-	pwm->soc = of_device_get_match_data(&pdev->dev);
-	pwm->dev = &pdev->dev;
+	pc->soc = of_device_get_match_data(&pdev->dev);
+	pc->dev = &pdev->dev;
 
-	pwm->regs = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(pwm->regs))
-		return PTR_ERR(pwm->regs);
+	pc->regs = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(pc->regs))
+		return PTR_ERR(pc->regs);
 
-	platform_set_drvdata(pdev, pwm);
+	platform_set_drvdata(pdev, pc);
 
-	pwm->clk = devm_clk_get(&pdev->dev, NULL);
-	if (IS_ERR(pwm->clk))
-		return PTR_ERR(pwm->clk);
+	pc->clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(pc->clk))
+		return PTR_ERR(pc->clk);
 
 	ret = devm_tegra_core_dev_init_opp_table_common(&pdev->dev);
 	if (ret)
···
 		return ret;
 
 	/* Set maximum frequency of the IP */
-	ret = dev_pm_opp_set_rate(pwm->dev, pwm->soc->max_frequency);
+	ret = dev_pm_opp_set_rate(pc->dev, pc->soc->max_frequency);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "Failed to set max frequency: %d\n", ret);
 		goto put_pm;
···
 	 * clock register resolutions. Get the configured frequency
 	 * so that PWM period can be calculated more accurately.
 	 */
-	pwm->clk_rate = clk_get_rate(pwm->clk);
+	pc->clk_rate = clk_get_rate(pc->clk);
 
 	/* Set minimum limit of PWM period for the IP */
-	pwm->min_period_ns =
-	    (NSEC_PER_SEC / (pwm->soc->max_frequency >> PWM_DUTY_WIDTH)) + 1;
+	pc->min_period_ns =
+	    (NSEC_PER_SEC / (pc->soc->max_frequency >> PWM_DUTY_WIDTH)) + 1;
 
-	pwm->rst = devm_reset_control_get_exclusive(&pdev->dev, "pwm");
-	if (IS_ERR(pwm->rst)) {
-		ret = PTR_ERR(pwm->rst);
+	pc->rst = devm_reset_control_get_exclusive(&pdev->dev, "pwm");
+	if (IS_ERR(pc->rst)) {
+		ret = PTR_ERR(pc->rst);
 		dev_err(&pdev->dev, "Reset control is not found: %d\n", ret);
 		goto put_pm;
 	}
 
-	reset_control_deassert(pwm->rst);
+	reset_control_deassert(pc->rst);
 
-	pwm->chip.dev = &pdev->dev;
-	pwm->chip.ops = &tegra_pwm_ops;
-	pwm->chip.npwm = pwm->soc->num_channels;
+	pc->chip.dev = &pdev->dev;
+	pc->chip.ops = &tegra_pwm_ops;
+	pc->chip.npwm = pc->soc->num_channels;
 
-	ret = pwmchip_add(&pwm->chip);
+	ret = pwmchip_add(&pc->chip);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "pwmchip_add() failed: %d\n", ret);
-		reset_control_assert(pwm->rst);
+		reset_control_assert(pc->rst);
 		goto put_pm;
 	}