PM / devfreq: rockchip-dfi: Pass private data struct to internal functions

The internal functions do not need the struct devfreq_event_dev *,
so pass them the struct rockchip_dfi *. This is a preparation for
adding perf support later which doesn't have a struct devfreq_event_dev *.

Link: https://lore.kernel.org/all/20231018061714.3553817-14-s.hauer@pengutronix.de/
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

Author: saschahauer

drivers/devfreq/event/rockchip-dfi.c

@@ -73,9 +73,8 @@ struct rockchip_dfi {
 	unsigned int max_channels;
 };
 
-static void rockchip_dfi_start_hardware_counter(struct devfreq_event_dev *edev)
+static void rockchip_dfi_start_hardware_counter(struct rockchip_dfi *dfi)
 {
-	struct rockchip_dfi *dfi = devfreq_event_get_drvdata(edev);
 	void __iomem *dfi_regs = dfi->regs;
 
 	/* clear DDRMON_CTRL setting */
@@ -103,18 +102,16 @@ static void rockchip_dfi_start_hardware_counter(struct devfreq_event_dev *edev)
 		       dfi_regs + DDRMON_CTRL);
 }
 
-static void rockchip_dfi_stop_hardware_counter(struct devfreq_event_dev *edev)
+static void rockchip_dfi_stop_hardware_counter(struct rockchip_dfi *dfi)
 {
-	struct rockchip_dfi *dfi = devfreq_event_get_drvdata(edev);
 	void __iomem *dfi_regs = dfi->regs;
 
 	writel_relaxed(HIWORD_UPDATE(0, DDRMON_CTRL_SOFTWARE_EN),
 		       dfi_regs + DDRMON_CTRL);
 }
 
-static void rockchip_dfi_read_counters(struct devfreq_event_dev *edev, struct dmc_count *count)
+static void rockchip_dfi_read_counters(struct rockchip_dfi *dfi, struct dmc_count *count)
 {
-	struct rockchip_dfi *dfi = devfreq_event_get_drvdata(edev);
 	u32 i;
 	void __iomem *dfi_regs = dfi->regs;
 
@@ -132,7 +129,7 @@ static int rockchip_dfi_disable(struct devfreq_event_dev *edev)
 {
 	struct rockchip_dfi *dfi = devfreq_event_get_drvdata(edev);
 
-	rockchip_dfi_stop_hardware_counter(edev);
+	rockchip_dfi_stop_hardware_counter(dfi);
 	clk_disable_unprepare(dfi->clk);
 
 	return 0;
@@ -149,7 +146,7 @@ static int rockchip_dfi_enable(struct devfreq_event_dev *edev)
 		return ret;
 	}
 
-	rockchip_dfi_start_hardware_counter(edev);
+	rockchip_dfi_start_hardware_counter(dfi);
 	return 0;
 }
 
@@ -167,7 +164,7 @@ static int rockchip_dfi_get_event(struct devfreq_event_dev *edev,
 	u32 access = 0, total = 0;
 	int i;
 
-	rockchip_dfi_read_counters(edev, &count);
+	rockchip_dfi_read_counters(dfi, &count);
 
 	/* We can only report one channel, so find the busiest one */
 	for (i = 0; i < dfi->max_channels; i++) {