diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index 8cec9a0..81c85d2 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -528,7 +528,7 @@ void rtc_handle_legacy_irq(struct rtc_device *rtc, int num, int mode)
  */
 void rtc_aie_update_irq(void *private)
 {
-	struct rtc_device *rtc = (struct rtc_device *)private;
+	struct rtc_device *rtc = private;
 	rtc_handle_legacy_irq(rtc, 1, RTC_AF);
 }
 
@@ -541,7 +541,7 @@ void rtc_aie_update_irq(void *private)
  */
 void rtc_uie_update_irq(void *private)
 {
-	struct rtc_device *rtc = (struct rtc_device *)private;
+	struct rtc_device *rtc = private;
 	rtc_handle_legacy_irq(rtc, 1,  RTC_UF);
 }
 
diff --git a/drivers/rtc/rtc-88pm80x.c b/drivers/rtc/rtc-88pm80x.c
index 466bf7f..819612e 100644
--- a/drivers/rtc/rtc-88pm80x.c
+++ b/drivers/rtc/rtc-88pm80x.c
@@ -60,7 +60,7 @@ struct pm80x_rtc_info {
 
 static irqreturn_t rtc_update_handler(int irq, void *data)
 {
-	struct pm80x_rtc_info *info = (struct pm80x_rtc_info *)data;
+	struct pm80x_rtc_info *info = data;
 	int mask;
 
 	mask = PM800_ALARM | PM800_ALARM_WAKEUP;
diff --git a/drivers/rtc/rtc-88pm860x.c b/drivers/rtc/rtc-88pm860x.c
index 19e53b3..67f7fa3 100644
--- a/drivers/rtc/rtc-88pm860x.c
+++ b/drivers/rtc/rtc-88pm860x.c
@@ -59,7 +59,7 @@ struct pm860x_rtc_info {
 
 static irqreturn_t rtc_update_handler(int irq, void *data)
 {
-	struct pm860x_rtc_info *info = (struct pm860x_rtc_info *)data;
+	struct pm860x_rtc_info *info = data;
 	int mask;
 
 	mask = ALARM | ALARM_WAKEUP;
diff --git a/drivers/rtc/rtc-at32ap700x.c b/drivers/rtc/rtc-at32ap700x.c
index de8bf56..f603f99 100644
--- a/drivers/rtc/rtc-at32ap700x.c
+++ b/drivers/rtc/rtc-at32ap700x.c
@@ -164,7 +164,7 @@ static int at32_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
 
 static irqreturn_t at32_rtc_interrupt(int irq, void *dev_id)
 {
-	struct rtc_at32ap700x *rtc = (struct rtc_at32ap700x *)dev_id;
+	struct rtc_at32ap700x *rtc = dev_id;
 	unsigned long isr = rtc_readl(rtc, ISR);
 	unsigned long events = 0;
 	int ret = IRQ_NONE;
diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c
index e5ad527..0709968 100644
--- a/drivers/rtc/rtc-hym8563.c
+++ b/drivers/rtc/rtc-hym8563.c
@@ -436,7 +436,7 @@ static struct clk *hym8563_clkout_register_clk(struct hym8563 *hym8563)
  */
 static irqreturn_t hym8563_irq(int irq, void *dev_id)
 {
-	struct hym8563 *hym8563 = (struct hym8563 *)dev_id;
+	struct hym8563 *hym8563 = dev_id;
 	struct i2c_client *client = hym8563->client;
 	struct mutex *lock = &hym8563->rtc->ops_lock;
 	int data, ret;
diff --git a/drivers/rtc/rtc-m48t59.c b/drivers/rtc/rtc-m48t59.c
index d99a705..2e35f73 100644
--- a/drivers/rtc/rtc-m48t59.c
+++ b/drivers/rtc/rtc-m48t59.c
@@ -302,7 +302,7 @@ static int m48t59_rtc_proc(struct device *dev, struct seq_file *seq)
  */
 static irqreturn_t m48t59_rtc_interrupt(int irq, void *dev_id)
 {
-	struct device *dev = (struct device *)dev_id;
+	struct device *dev = dev_id;
 	struct platform_device *pdev = to_platform_device(dev);
 	struct m48t59_plat_data *pdata = dev_get_platdata(&pdev->dev);
 	struct m48t59_private *m48t59 = platform_get_drvdata(pdev);
diff --git a/drivers/rtc/rtc-max8925.c b/drivers/rtc/rtc-max8925.c
index 67d6fc2..45d7e40 100644
--- a/drivers/rtc/rtc-max8925.c
+++ b/drivers/rtc/rtc-max8925.c
@@ -74,7 +74,7 @@ struct max8925_rtc_info {
 
 static irqreturn_t rtc_update_handler(int irq, void *data)
 {
-	struct max8925_rtc_info *info = (struct max8925_rtc_info *)data;
+	struct max8925_rtc_info *info = data;
 
 	/* disable ALARM0 except for 1SEC alarm */
 	max8925_set_bits(info->rtc, MAX8925_ALARM0_CNTL, 0x7f, 0);
diff --git a/drivers/rtc/rtc-pic32.c b/drivers/rtc/rtc-pic32.c
index 5cfb6df..04788c3 100644
--- a/drivers/rtc/rtc-pic32.c
+++ b/drivers/rtc/rtc-pic32.c
@@ -92,7 +92,7 @@ static void pic32_rtc_alarm_clk_enable(struct pic32_rtc_dev *pdata,
 
 static irqreturn_t pic32_rtc_alarmirq(int irq, void *id)
 {
-	struct pic32_rtc_dev *pdata = (struct pic32_rtc_dev *)id;
+	struct pic32_rtc_dev *pdata = id;
 
 	clk_enable(pdata->clk);
 	rtc_update_irq(pdata->rtc, 1, RTC_AF | RTC_IRQF);
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index a8992c2..8e8a815 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -113,7 +113,7 @@ static void s3c_rtc_disable_clk(struct s3c_rtc *info)
 /* IRQ Handlers */
 static irqreturn_t s3c_rtc_tickirq(int irq, void *id)
 {
-	struct s3c_rtc *info = (struct s3c_rtc *)id;
+	struct s3c_rtc *info = id;
 
 	if (info->data->irq_handler)
 		info->data->irq_handler(info, S3C2410_INTP_TIC);
@@ -123,7 +123,7 @@ static irqreturn_t s3c_rtc_tickirq(int irq, void *id)
 
 static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
 {
-	struct s3c_rtc *info = (struct s3c_rtc *)id;
+	struct s3c_rtc *info = id;
 
 	if (info->data->irq_handler)
 		info->data->irq_handler(info, S3C2410_INTP_ALM);
diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c
index 82b0af1..75eb92c 100644
--- a/drivers/rtc/rtc-st-lpc.c
+++ b/drivers/rtc/rtc-st-lpc.c
@@ -74,7 +74,7 @@ static void st_rtc_set_hw_alarm(struct st_rtc *rtc,
 
 static irqreturn_t st_rtc_handler(int this_irq, void *data)
 {
-	struct st_rtc *rtc = (struct st_rtc *)data;
+	struct st_rtc *rtc = data;
 
 	rtc_update_irq(rtc->rtc_dev, 1, RTC_AF);
 
diff --git a/drivers/rtc/rtc-stm32.c b/drivers/rtc/rtc-stm32.c
index 3a5c3d7..66fc7ba 100644
--- a/drivers/rtc/rtc-stm32.c
+++ b/drivers/rtc/rtc-stm32.c
@@ -169,7 +169,7 @@ static int stm32_rtc_wait_sync(struct stm32_rtc *rtc)
 
 static irqreturn_t stm32_rtc_alarm_irq(int irq, void *dev_id)
 {
-	struct stm32_rtc *rtc = (struct stm32_rtc *)dev_id;
+	struct stm32_rtc *rtc = dev_id;
 	unsigned int isr, cr;
 
 	mutex_lock(&rtc->rtc_dev->ops_lock);
diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c
index 305c4d0..496a8dd 100644
--- a/drivers/rtc/rtc-sun6i.c
+++ b/drivers/rtc/rtc-sun6i.c
@@ -256,7 +256,7 @@ CLK_OF_DECLARE_DRIVER(sun6i_rtc_clk, "allwinner,sun6i-a31-rtc",
 
 static irqreturn_t sun6i_rtc_alarmirq(int irq, void *id)
 {
-	struct sun6i_rtc_dev *chip = (struct sun6i_rtc_dev *) id;
+	struct sun6i_rtc_dev *chip = id;
 	irqreturn_t ret = IRQ_NONE;
 	u32 val;
 
diff --git a/drivers/rtc/rtc-sunxi.c b/drivers/rtc/rtc-sunxi.c
index abada60..f1f7fd7 100644
--- a/drivers/rtc/rtc-sunxi.c
+++ b/drivers/rtc/rtc-sunxi.c
@@ -158,7 +158,7 @@ struct sunxi_rtc_dev {
 
 static irqreturn_t sunxi_rtc_alarmirq(int irq, void *id)
 {
-	struct sunxi_rtc_dev *chip = (struct sunxi_rtc_dev *) id;
+	struct sunxi_rtc_dev *chip = id;
 	u32 val;
 
 	val = readl(chip->base + SUNXI_ALRM_IRQ_STA);
diff --git a/drivers/rtc/rtc-vr41xx.c b/drivers/rtc/rtc-vr41xx.c
index 7ce2296..a0aa377 100644
--- a/drivers/rtc/rtc-vr41xx.c
+++ b/drivers/rtc/rtc-vr41xx.c
@@ -228,7 +228,7 @@ static int vr41xx_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
 
 static irqreturn_t elapsedtime_interrupt(int irq, void *dev_id)
 {
-	struct platform_device *pdev = (struct platform_device *)dev_id;
+	struct platform_device *pdev = dev_id;
 	struct rtc_device *rtc = platform_get_drvdata(pdev);
 
 	rtc2_write(RTCINTREG, ELAPSEDTIME_INT);
@@ -240,7 +240,7 @@ static irqreturn_t elapsedtime_interrupt(int irq, void *dev_id)
 
 static irqreturn_t rtclong1_interrupt(int irq, void *dev_id)
 {
-	struct platform_device *pdev = (struct platform_device *)dev_id;
+	struct platform_device *pdev = dev_id;
 	struct rtc_device *rtc = platform_get_drvdata(pdev);
 	unsigned long count = periodic_count;
 
diff --git a/drivers/rtc/rtc-xgene.c b/drivers/rtc/rtc-xgene.c
index 65b432a..2b8247d 100644
--- a/drivers/rtc/rtc-xgene.c
+++ b/drivers/rtc/rtc-xgene.c
@@ -131,7 +131,7 @@ static const struct rtc_class_ops xgene_rtc_ops = {
 
 static irqreturn_t xgene_rtc_interrupt(int irq, void *id)
 {
-	struct xgene_rtc_dev *pdata = (struct xgene_rtc_dev *) id;
+	struct xgene_rtc_dev *pdata = id;
 
 	/* Check if interrupt asserted */
 	if (!(readl(pdata->csr_base + RTC_STAT) & RTC_STAT_BIT))
diff --git a/drivers/rtc/rtc-zynqmp.c b/drivers/rtc/rtc-zynqmp.c
index da18a8a..f2f8a2d 100644
--- a/drivers/rtc/rtc-zynqmp.c
+++ b/drivers/rtc/rtc-zynqmp.c
@@ -193,7 +193,7 @@ static const struct rtc_class_ops xlnx_rtc_ops = {
 
 static irqreturn_t xlnx_rtc_interrupt(int irq, void *id)
 {
-	struct xlnx_rtc_dev *xrtcdev = (struct xlnx_rtc_dev *)id;
+	struct xlnx_rtc_dev *xrtcdev = id;
 	unsigned int status;
 
 	status = readl(xrtcdev->reg_base + RTC_INT_STS);
