[PATCH 7/7] PM / devfreq: rockchip-dfi: add RK3576 support

[Sebastian Reichel]

Add RK3576 support to the DFI driver exposing the same functionality
as found on previous chips. This uses the RK3588 init for getting the
DRAM type info from the GRF registers. In contrast to RK3588 it uses
a newer DDRMON controller IP, though (version 0x40).

Co-developed-by: Nicolas Frattaroli <nicolas.frattaroli@xxxxxxxxxxxxx>
Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@xxxxxxxxxxxxx>
Signed-off-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx>
---
 drivers/devfreq/event/rockchip-dfi.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c
index 8ba97af78e3d..a895e566b4b9 100644
--- a/drivers/devfreq/event/rockchip-dfi.c
+++ b/drivers/devfreq/event/rockchip-dfi.c
@@ -858,6 +858,10 @@ static const char * const rk3399_clk_names[] = {
 	"pclk_ddr_mon",
 };
 
+static const char * const rk3576_clk_names[] = {
+	"pclk_ddr_mon_ch0", "pclk_ddr_mon_ch1",
+};
+
 static const char * const rk3588_clk_names[] = {
 	"pclk_ddr_mon_ch0", "pclk_ddr_mon_ch1", "pclk_ddr_mon_ch2",
 	"pclk_ddr_mon_ch3",
@@ -887,6 +891,18 @@ static const struct rockchip_dfi_variant rk3568_variant = {
 	.reg_access = 0x2c,
 };
 
+static const struct rockchip_dfi_variant rk3576_variant = {
+	.init = rk3588_dfi_init,
+	.stride = 0x10000,
+	.max_channels = 2,
+	.clk_names = rk3576_clk_names,
+	.num_clks = ARRAY_SIZE(rk3576_clk_names),
+	.reg_write_access = 0x28,
+	.reg_read_access = 0x2c,
+	.reg_access = 0x34,
+	.reg_clock_cycles = 0x30,
+};
+
 static const struct rockchip_dfi_variant rk3588_variant = {
 	.init = rk3588_dfi_init,
 	.stride = 0x4000,
@@ -903,6 +919,7 @@ static const struct rockchip_dfi_variant rk3588_variant = {
 static const struct of_device_id rockchip_dfi_id_match[] = {
 	{ .compatible = "rockchip,rk3399-dfi", .data = &rk3399_variant },
 	{ .compatible = "rockchip,rk3568-dfi", .data = &rk3568_variant },
+	{ .compatible = "rockchip,rk3576-dfi", .data = &rk3576_variant },
 	{ .compatible = "rockchip,rk3588-dfi", .data = &rk3588_variant },
 	{ },
 };

-- 
2.53.0