[PATCH v2 07/20] clk: sunxi: Add support for the A523 -R CCU

[Andre Przywara <andre.przywara@arm.com>]

Add a clock driver for the PRCM clock controller on the Allwinner A523
family of SoCs, often also used with an "r" prefix or suffix.
This just describes the clock gates and reset lines for the few devices
that we would need, most prominently the R_I2C device for the PMIC.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
---
 drivers/clk/sunxi/Kconfig      |  7 ++++++
 drivers/clk/sunxi/Makefile     |  1 +
 drivers/clk/sunxi/clk_a523_r.c | 39 ++++++++++++++++++++++++++++++++++
 drivers/clk/sunxi/clk_sunxi.c  |  5 +++++
 4 files changed, 52 insertions(+)
 create mode 100644 drivers/clk/sunxi/clk_a523_r.c

diff --git a/drivers/clk/sunxi/Kconfig b/drivers/clk/sunxi/Kconfig
index 74e89b86301..1c1cc82719c 100644
--- a/drivers/clk/sunxi/Kconfig
+++ b/drivers/clk/sunxi/Kconfig
@@ -136,4 +136,11 @@ config CLK_SUN55I_A523
 	  This enables common clock driver support for platforms based
 	  on Allwinner A523/T527 SoC.
 
+config CLK_SUN55I_A523_R
+	bool "Clock driver for Allwinner A523 generation PRCM"
+	default MACH_SUN55I_A523
+	help
+	  This enables common clock driver support for the PRCM
+	  in Allwinner A523/T527 SoCs.
+
 endif # CLK_SUNXI
diff --git a/drivers/clk/sunxi/Makefile b/drivers/clk/sunxi/Makefile
index dd33eabe2ed..93b542cebcd 100644
--- a/drivers/clk/sunxi/Makefile
+++ b/drivers/clk/sunxi/Makefile
@@ -26,3 +26,4 @@ obj-$(CONFIG_CLK_SUN50I_H616) += clk_h616.o
 obj-$(CONFIG_CLK_SUN50I_A64) += clk_a64.o
 obj-$(CONFIG_CLK_SUN50I_A100) += clk_a100.o
 obj-$(CONFIG_CLK_SUN55I_A523) += clk_a523.o
+obj-$(CONFIG_CLK_SUN55I_A523_R) += clk_a523_r.o
diff --git a/drivers/clk/sunxi/clk_a523_r.c b/drivers/clk/sunxi/clk_a523_r.c
new file mode 100644
index 00000000000..01e613d20aa
--- /dev/null
+++ b/drivers/clk/sunxi/clk_a523_r.c
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2024 Arm Ltd.
+ */
+
+#include <clk-uclass.h>
+#include <dm.h>
+#include <clk/sunxi.h>
+#include <dt-bindings/clock/sun55i-a523-r-ccu.h>
+#include <dt-bindings/reset/sun55i-a523-r-ccu.h>
+#include <linux/bitops.h>
+
+static struct ccu_clk_gate a523_r_gates[] = {
+	[CLK_R_AHB]             = GATE_DUMMY,
+	[CLK_R_APB0]            = GATE_DUMMY,
+	[CLK_R_APB1]            = GATE_DUMMY,
+	[CLK_BUS_R_TWD]         = GATE(0x12c, BIT(0)),
+	[CLK_BUS_R_I2C0]        = GATE(0x19c, BIT(0)),
+	[CLK_BUS_R_I2C1]        = GATE(0x19c, BIT(1)),
+	[CLK_BUS_R_I2C2]        = GATE(0x19c, BIT(2)),
+	[CLK_BUS_R_RTC]         = GATE(0x20c, BIT(0)),
+};
+
+static struct ccu_reset a523_r_resets[] = {
+	[RST_BUS_R_TWD]         = RESET(0x12c, BIT(16)),
+	[RST_BUS_R_UART0]       = RESET(0x18c, BIT(16)),
+	[RST_BUS_R_I2C0]        = RESET(0x19c, BIT(16)),
+	[RST_BUS_R_I2C1]        = RESET(0x19c, BIT(17)),
+	[RST_BUS_R_I2C2]        = RESET(0x19c, BIT(18)),
+	[RST_BUS_R_PPU1]        = RESET(0x1ac, BIT(17)),
+	[RST_BUS_R_RTC]         = RESET(0x20c, BIT(16)),
+};
+
+const struct ccu_desc a523_r_ccu_desc = {
+	.gates = a523_r_gates,
+	.resets = a523_r_resets,
+	.num_gates = ARRAY_SIZE(a523_r_gates),
+	.num_resets = ARRAY_SIZE(a523_r_resets),
+};
diff --git a/drivers/clk/sunxi/clk_sunxi.c b/drivers/clk/sunxi/clk_sunxi.c
index 30baabaafcd..842a0541bd6 100644
--- a/drivers/clk/sunxi/clk_sunxi.c
+++ b/drivers/clk/sunxi/clk_sunxi.c
@@ -127,6 +127,7 @@ extern const struct ccu_desc h6_r_ccu_desc;
 extern const struct ccu_desc r40_ccu_desc;
 extern const struct ccu_desc v3s_ccu_desc;
 extern const struct ccu_desc a523_ccu_desc;
+extern const struct ccu_desc a523_r_ccu_desc;
 
 static const struct udevice_id sunxi_clk_ids[] = {
 #ifdef CONFIG_CLK_SUN4I_A10
@@ -228,6 +229,10 @@ static const struct udevice_id sunxi_clk_ids[] = {
 #ifdef CONFIG_CLK_SUN55I_A523
 	{ .compatible = "allwinner,sun55i-a523-ccu",
 	  .data = (ulong)&a523_ccu_desc },
+#endif
+#ifdef CONFIG_CLK_SUN55I_A523_R
+	{ .compatible = "allwinner,sun55i-a523-r-ccu",
+	  .data = (ulong)&a523_r_ccu_desc },
 #endif
 	{ }
 };
-- 
2.46.3