[PATCH 10/18] PM / devfreq: rockchip-dfi: Add RK3568 support

[Sascha Hauer <s.hauer@pengutronix.de>]

This adds RK3568 support to the DFI driver. The driver itself doesn't
need a change, only initialization differs from the currently supported
RK3399.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/devfreq/event/rockchip-dfi.c | 24 ++++++++++++++++++++++++
 include/soc/rockchip/rk3568_grf.h    | 12 ++++++++++++
 2 files changed, 36 insertions(+)
 create mode 100644 include/soc/rockchip/rk3568_grf.h

diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c
index 035984d3c7b01..78cb594bd2a81 100644
--- a/drivers/devfreq/event/rockchip-dfi.c
+++ b/drivers/devfreq/event/rockchip-dfi.c
@@ -23,6 +23,7 @@
 
 #include <soc/rockchip/rockchip_grf.h>
 #include <soc/rockchip/rk3399_grf.h>
+#include <soc/rockchip/rk3568_grf.h>
 
 #define DMC_MAX_CHANNELS	2
 
@@ -209,6 +210,24 @@ static int rk3399_dfi_init(struct rockchip_dfi *dfi)
 	return 0;
 };
 
+static int rk3568_dfi_init(struct rockchip_dfi *dfi)
+{
+	struct regmap *regmap_pmu = dfi->regmap_pmu;
+	u32 reg2, reg3;
+
+	regmap_read(regmap_pmu, RK3568_PMUGRF_OS_REG2, &reg2);
+	regmap_read(regmap_pmu, RK3568_PMUGRF_OS_REG3, &reg3);
+
+	dfi->ddr_type = FIELD_GET(RK3568_PMUGRF_OS_REG2_DRAMTYPE_INFO, reg2);
+
+	if (FIELD_GET(RK3568_PMUGRF_OS_REG3_SYSREG_VERSION, reg3) >= 0x3)
+		dfi->ddr_type |= FIELD_GET(RK3568_PMUGRF_OS_REG3_DRAMTYPE_INFO_V3, reg3) << 3;
+
+	dfi->channel_mask = 1;
+
+	return 0;
+};
+
 struct rockchip_dfi_devtype_data {
 	int (*init)(struct rockchip_dfi *dfi);
 };
@@ -217,8 +236,13 @@ static struct rockchip_dfi_devtype_data rk3399_devtype_data = {
 	.init = rk3399_dfi_init,
 };
 
+static struct rockchip_dfi_devtype_data rk3568_devtype_data = {
+	.init = rk3568_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 },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, rockchip_dfi_id_match);
diff --git a/include/soc/rockchip/rk3568_grf.h b/include/soc/rockchip/rk3568_grf.h
new file mode 100644
index 0000000000000..575584e9d8834
--- /dev/null
+++ b/include/soc/rockchip/rk3568_grf.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+#ifndef __SOC_RK3568_GRF_H
+#define __SOC_RK3568_GRF_H
+
+#define RK3568_PMUGRF_OS_REG2		0x208
+#define RK3568_PMUGRF_OS_REG2_DRAMTYPE_INFO		GENMASK(15, 13)
+
+#define RK3568_PMUGRF_OS_REG3		0x20c
+#define RK3568_PMUGRF_OS_REG3_DRAMTYPE_INFO_V3		GENMASK(13, 12)
+#define RK3568_PMUGRF_OS_REG3_SYSREG_VERSION		GENMASK(31, 28)
+
+#endif /* __SOC_RK3568_GRF_H */
-- 
2.30.2