[PATCH v4 18/21] PM / devfreq: rockchip-dfi: add support for RK3588

[Sascha Hauer]

Add support for the RK3588 to the driver. The RK3588 has four DDR
channels with a register stride of 0x4000 between the channel
registers, also it has a DDRMON_CTRL register per channel.

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 drivers/devfreq/event/rockchip-dfi.c | 34 +++++++++++++++++++++++++++-
 include/soc/rockchip/rk3588_grf.h    | 18 +++++++++++++++
 2 files changed, 51 insertions(+), 1 deletion(-)
 create mode 100644 include/soc/rockchip/rk3588_grf.h

diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c
index 74d69153e6386..3630981505c6d 100644
--- a/drivers/devfreq/event/rockchip-dfi.c
+++ b/drivers/devfreq/event/rockchip-dfi.c
@@ -25,8 +25,9 @@
 #include <soc/rockchip/rockchip_grf.h>
 #include <soc/rockchip/rk3399_grf.h>
 #include <soc/rockchip/rk3568_grf.h>
+#include <soc/rockchip/rk3588_grf.h>
 
-#define DMC_MAX_CHANNELS	2
+#define DMC_MAX_CHANNELS	4
 
 #define HIWORD_UPDATE(val, mask)	((val) | (mask) << 16)
 
@@ -616,6 +617,32 @@ static int rk3568_dfi_init(struct rockchip_dfi *dfi)
 	return 0;
 };
 
+static int rk3588_dfi_init(struct rockchip_dfi *dfi)
+{
+	struct regmap *regmap_pmu = dfi->regmap_pmu;
+	u32 reg2, reg3, reg4;
+
+	regmap_read(regmap_pmu, RK3588_PMUGRF_OS_REG2, &reg2);
+	regmap_read(regmap_pmu, RK3588_PMUGRF_OS_REG3, &reg3);
+	regmap_read(regmap_pmu, RK3588_PMUGRF_OS_REG4, &reg4);
+
+	dfi->ddr_type = FIELD_GET(RK3588_PMUGRF_OS_REG2_DRAMTYPE_INFO, reg2);
+
+	if (FIELD_GET(RK3588_PMUGRF_OS_REG3_SYSREG_VERSION, reg3) >= 0x3)
+		dfi->ddr_type |= FIELD_GET(RK3588_PMUGRF_OS_REG3_DRAMTYPE_INFO_V3, reg3) << 3;
+
+	dfi->buswidth[0] = FIELD_GET(RK3588_PMUGRF_OS_REG2_BW_CH0, reg2) == 0 ? 4 : 2;
+	dfi->buswidth[1] = FIELD_GET(RK3588_PMUGRF_OS_REG2_BW_CH1, reg2) == 0 ? 4 : 2;
+	dfi->buswidth[2] = FIELD_GET(RK3568_PMUGRF_OS_REG2_BW_CH0, reg4) == 0 ? 4 : 2;
+	dfi->buswidth[3] = FIELD_GET(RK3588_PMUGRF_OS_REG2_BW_CH1, reg4) == 0 ? 4 : 2;
+	dfi->channel_mask = FIELD_GET(RK3588_PMUGRF_OS_REG2_CH_INFO, reg2) |
+			    FIELD_GET(RK3588_PMUGRF_OS_REG2_CH_INFO, reg4) << 2;
+
+	dfi->ddrmon_stride = 0x4000;
+
+	return 0;
+};
+
 struct rockchip_dfi_devtype_data {
 	int (*init)(struct rockchip_dfi *dfi);
 };
@@ -628,9 +655,14 @@ static struct rockchip_dfi_devtype_data rk3568_devtype_data = {
 	.init = rk3568_dfi_init,
 };
 
+static struct rockchip_dfi_devtype_data rk3588_devtype_data = {
+	.init = rk3588_dfi_init,
+};
+
 static const struct of_device_id rockchip_dfi_id_match[] = {
 	{ .compatible = "rockchip,rk3399-dfi", .data = &rk3399_devtype_data },
 	{ .compatible = "rockchip,rk3568-dfi", .data = &rk3568_devtype_data },
+	{ .compatible = "rockchip,rk3588-dfi", .data = &rk3588_devtype_data },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, rockchip_dfi_id_match);
diff --git a/include/soc/rockchip/rk3588_grf.h b/include/soc/rockchip/rk3588_grf.h
new file mode 100644
index 0000000000000..630b35a550640
--- /dev/null
+++ b/include/soc/rockchip/rk3588_grf.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+#ifndef __SOC_RK3588_GRF_H
+#define __SOC_RK3588_GRF_H
+
+#define RK3588_PMUGRF_OS_REG2		0x208
+#define RK3588_PMUGRF_OS_REG2_DRAMTYPE_INFO		GENMASK(15, 13)
+#define RK3588_PMUGRF_OS_REG2_BW_CH0			GENMASK(3, 2)
+#define RK3588_PMUGRF_OS_REG2_BW_CH1                    GENMASK(19, 18)
+#define RK3588_PMUGRF_OS_REG2_CH_INFO                   GENMASK(29, 28)
+
+#define RK3588_PMUGRF_OS_REG3		0x20c
+#define RK3588_PMUGRF_OS_REG3_DRAMTYPE_INFO_V3		GENMASK(13, 12)
+#define RK3588_PMUGRF_OS_REG3_SYSREG_VERSION		GENMASK(31, 28)
+
+#define RK3588_PMUGRF_OS_REG4           0x210
+#define RK3588_PMUGRF_OS_REG5           0x214
+
+#endif /* __SOC_RK3588_GRF_H */
-- 
2.39.2