PM / devfreq: rockchip-dfi: Handle LPDDR4X

In the DFI driver LPDDR4X can be handled in the same way as LPDDR4. Add
the missing case.

Link: https://lore.kernel.org/all/20231018061714.3553817-13-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>
Acked-by: Heiko Stuebner <heiko@sntech.de>
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

@@ -90,6 +90,7 @@ static void rockchip_dfi_start_hardware_counter(struct devfreq_event_dev *edev)
 			       dfi_regs + DDRMON_CTRL);
 		break;
 	case ROCKCHIP_DDRTYPE_LPDDR4:
+	case ROCKCHIP_DDRTYPE_LPDDR4X:
 		writel_relaxed(HIWORD_UPDATE(DDRMON_CTRL_LPDDR4, DDRMON_CTRL_DDR_TYPE_MASK),
 			       dfi_regs + DDRMON_CTRL);
 		break;

include/soc/rockchip/rockchip_grf.h

@@ -12,6 +12,7 @@ enum {
 	ROCKCHIP_DDRTYPE_LPDDR2	= 5,
 	ROCKCHIP_DDRTYPE_LPDDR3	= 6,
 	ROCKCHIP_DDRTYPE_LPDDR4	= 7,
+	ROCKCHIP_DDRTYPE_LPDDR4X = 8,
 };
 
 #endif /* __SOC_ROCKCHIP_GRF_H */