[PATCH v2 15/15] clk: sunxi-ng: add support for the A523/T527 PRCM CCU

Andre Przywara
2025-02-14T12:56:35Z

The A523/T527 SoCs have clock/reset controls in the PRCM part, like many
previous SoCs. For a change, the whole PRCM is documented in the A523
manual, including the system bus tree, so we can describe all those
clocks correctly based on that. There layout seems to be derived from
the H6 and H616 PRCM CCUs, though there are more clocks, and many clocks
have subtly changed.

Describe all the mod and gate clocks, including the three bus clocks
(R_AHB, R_APB0, and R_APB1).

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
---
drivers/clk/sunxi-ng/Kconfig | 5 +
drivers/clk/sunxi-ng/Makefile | 2 +
drivers/clk/sunxi-ng/ccu-sun55i-a523-r.c | 245 +++++++++++++++++++++++
drivers/clk/sunxi-ng/ccu-sun55i-a523-r.h | 14 ++
4 files changed, 266 insertions(+)
create mode 100644 drivers/clk/sunxi-ng/ccu-sun55i-a523-r.c
create mode 100644 drivers/clk/sunxi-ng/ccu-sun55i-a523-r.h

diff --git a/drivers/clk/sunxi-ng/Kconfig b/drivers/clk/sunxi-ng/Kconfig
index 04efbda847cf9..5830a9d87bf25 100644
--- a/drivers/clk/sunxi-ng/Kconfig
+++ b/drivers/clk/sunxi-ng/Kconfig
@@ -57,6 +57,11 @@ config SUN55I_A523_CCU
default y
depends on ARM64 || COMPILE_TEST

+config SUN55I_A523_R_CCU
+ tristate "Support for the Allwinner A523/T527 PRCM CCU"
+ default y
+ depends on ARM64 || COMPILE_TEST
+
config SUN4I_A10_CCU
tristate "Support for the Allwinner A10/A20 CCU"
default y
diff --git a/drivers/clk/sunxi-ng/Makefile b/drivers/clk/sunxi-ng/Makefile
index 01a887f7824bb..82e471036de69 100644
--- a/drivers/clk/sunxi-ng/Makefile
+++ b/drivers/clk/sunxi-ng/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_SUN50I_H6_CCU) += sun50i-h6-ccu.o
obj-$(CONFIG_SUN50I_H6_R_CCU) += sun50i-h6-r-ccu.o
obj-$(CONFIG_SUN50I_H616_CCU) += sun50i-h616-ccu.o
obj-$(CONFIG_SUN55I_A523_CCU) += sun55i-a523-ccu.o
+obj-$(CONFIG_SUN55I_A523_R_CCU) += sun55i-a523-r-ccu.o
obj-$(CONFIG_SUN4I_A10_CCU) += sun4i-a10-ccu.o
obj-$(CONFIG_SUN5I_CCU) += sun5i-ccu.o
obj-$(CONFIG_SUN6I_A31_CCU) += sun6i-a31-ccu.o
@@ -60,6 +61,7 @@ sun50i-h6-ccu-y += ccu-sun50i-h6.o
sun50i-h6-r-ccu-y += ccu-sun50i-h6-r.o
sun50i-h616-ccu-y += ccu-sun50i-h616.o
sun55i-a523-ccu-y += ccu-sun55i-a523.o
+sun55i-a523-r-ccu-y += ccu-sun55i-a523-r.o
sun4i-a10-ccu-y += ccu-sun4i-a10.o
sun5i-ccu-y += ccu-sun5i.o
sun6i-a31-ccu-y += ccu-sun6i-a31.o
diff --git a/drivers/clk/sunxi-ng/ccu-sun55i-a523-r.c b/drivers/clk/sunxi-ng/ccu-sun55i-a523-r.c
new file mode 100644
index 0000000000000..0dafc38370f22
--- /dev/null
+++ b/drivers/clk/sunxi-ng/ccu-sun55i-a523-r.c
@@ -0,0 +1,245 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2024 Arm Ltd.
+ * Based on the D1 CCU driver:
+ * Copyright (c) 2020 huangzhenwei@allwinnertech.com
+ * Copyright (C) 2021 Samuel Holland <samuel@sholland.org>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include "ccu_common.h"
+#include "ccu_reset.h"
+
+#include "ccu_gate.h"
+#include "ccu_mp.h"
+
+#include "ccu-sun55i-a523-r.h"
+
+static const struct clk_parent_data r_ahb_apb_parents[] = {
+ { .fw_name = "hosc" },
+ { .fw_name = "losc" },
+ { .fw_name = "iosc" },
+ { .fw_name = "pll-periph" },
+ { .fw_name = "pll-audio" },
+};
+static SUNXI_CCU_M_DATA_WITH_MUX(r_ahb_clk, "r-ahb",
+ r_ahb_apb_parents, 0x000,
+ 0, 5, /* M */
+ 24, 3, /* mux */
+ 0);
+
+static SUNXI_CCU_M_DATA_WITH_MUX(r_apb0_clk, "r-apb0",
+ r_ahb_apb_parents, 0x00c,
+ 0, 5, /* M */
+ 24, 3, /* mux */
+ 0);
+
+static SUNXI_CCU_M_DATA_WITH_MUX(r_apb1_clk, "r-apb1",
+ r_ahb_apb_parents, 0x010,
+ 0, 5, /* M */
+ 24, 3, /* mux */
+ 0);
+
+static SUNXI_CCU_P_DATA_WITH_MUX_GATE(r_cpu_timer0, "r-timer0",
+ r_ahb_apb_parents, 0x100,
+ 1, 3, /* P */
+ 4, 3, /* mux */
+ BIT(0),
+ 0);
+static SUNXI_CCU_P_DATA_WITH_MUX_GATE(r_cpu_timer1, "r-timer1",
+ r_ahb_apb_parents, 0x104,
+ 1, 3, /* P */
+ 4, 3, /* mux */
+ BIT(0),
+ 0);
+static SUNXI_CCU_P_DATA_WITH_MUX_GATE(r_cpu_timer2, "r-timer2",
+ r_ahb_apb_parents, 0x108,
+ 1, 3, /* P */
+ 4, 3, /* mux */
+ BIT(0),
+ 0);
+
+static SUNXI_CCU_GATE_HW(bus_r_timer_clk, "bus-r-timer", &r_ahb_clk.common.hw,
+ 0x11c, BIT(0), 0);
+static SUNXI_CCU_GATE_HW(bus_r_twd_clk, "bus-r-twd", &r_apb0_clk.common.hw,
+ 0x12c, BIT(0), 0);
+
+static const struct clk_parent_data r_pwmctrl_parents[] = {
+ { .fw_name = "hosc" },
+ { .fw_name = "losc" },
+ { .fw_name = "iosc" },
+};
+static SUNXI_CCU_MUX_DATA_WITH_GATE(r_pwmctrl_clk, "r-pwmctrl",
+ r_pwmctrl_parents, 0x130,
+ 24, 1, /* mux */
+ BIT(31),
+ 0);
+static SUNXI_CCU_GATE_HW(bus_r_pwmctrl_clk, "bus-r-pwmctrl",
+ &r_apb0_clk.common.hw, 0x13c, BIT(0), 0);
+
+/* SPI clock is /M/N (same as new MMC?) */
+static SUNXI_CCU_GATE_HW(bus_r_spi_clk, "bus-r-spi",
+ &r_ahb_clk.common.hw, 0x15c, BIT(0), 0);
+static SUNXI_CCU_GATE_HW(bus_r_spinlock_clk, "bus-r-spinlock",
+ &r_ahb_clk.common.hw, 0x16c, BIT(0), 0);
+static SUNXI_CCU_GATE_HW(bus_r_msgbox_clk, "bus-r-msgbox",
+ &r_ahb_clk.common.hw, 0x17c, BIT(0), 0);
+static SUNXI_CCU_GATE_HW(bus_r_uart0_clk, "bus-r-uart0",
+ &r_apb1_clk.common.hw, 0x18c, BIT(0), 0);
+static SUNXI_CCU_GATE_HW(bus_r_uart1_clk, "bus-r-uart1",
+ &r_apb1_clk.common.hw, 0x18c, BIT(1), 0);
+static SUNXI_CCU_GATE_HW(bus_r_i2c0_clk, "bus-r-i2c0",
+ &r_apb1_clk.common.hw, 0x19c, BIT(0), 0);
+static SUNXI_CCU_GATE_HW(bus_r_i2c1_clk, "bus-r-i2c1",
+ &r_apb1_clk.common.hw, 0x19c, BIT(1), 0);
+static SUNXI_CCU_GATE_HW(bus_r_i2c2_clk, "bus-r-i2c2",
+ &r_apb1_clk.common.hw, 0x19c, BIT(2), 0);
+static SUNXI_CCU_GATE_HW(bus_r_ppu0_clk, "bus-r-ppu0",
+ &r_apb0_clk.common.hw, 0x1ac, BIT(0), 0);
+static SUNXI_CCU_GATE_HW(bus_r_ppu1_clk, "bus-r-ppu1",
+ &r_apb0_clk.common.hw, 0x1ac, BIT(1), 0);
+static SUNXI_CCU_GATE_HW(bus_r_cpu_bist_clk, "bus-r-cpu-bist",
+ &r_apb0_clk.common.hw, 0x1bc, BIT(0), 0);
+
+static const struct clk_parent_data r_ir_rx_parents[] = {
+ { .fw_name = "losc" },
+ { .fw_name = "hosc" },
+};
+static SUNXI_CCU_M_DATA_WITH_MUX_GATE(r_ir_rx_clk, "r-ir-rx",
+ r_ir_rx_parents, 0x1c0,
+ 0, 5, /* M */
+ 24, 2, /* mux */
+ BIT(31), /* gate */
+ 0);
+static SUNXI_CCU_GATE_HW(bus_r_ir_rx_clk, "bus-r-ir-rx",
+ &r_apb0_clk.common.hw, 0x1cc, BIT(0), 0);
+
+static SUNXI_CCU_GATE_HW(bus_r_dma_clk, "bus-r-dma",
+ &r_apb0_clk.common.hw, 0x1dc, BIT(0), 0);
+static SUNXI_CCU_GATE_HW(bus_r_rtc_clk, "bus-r-rtc",
+ &r_apb0_clk.common.hw, 0x20c, BIT(0), 0);
+static SUNXI_CCU_GATE_HW(bus_r_cpucfg_clk, "bus-r-cpucfg",
+ &r_apb0_clk.common.hw, 0x22c, BIT(0), 0);
+
+static struct ccu_common *sun55i_a523_r_ccu_clks[] = {
+ &r_ahb_clk.common,
+ &r_apb0_clk.common,
+ &r_apb1_clk.common,
+ &r_cpu_timer0.common,
+ &r_cpu_timer1.common,
+ &r_cpu_timer2.common,
+ &bus_r_timer_clk.common,
+ &bus_r_twd_clk.common,
+ &r_pwmctrl_clk.common,
+ &bus_r_pwmctrl_clk.common,
+ &bus_r_spi_clk.common,
+ &bus_r_spinlock_clk.common,
+ &bus_r_msgbox_clk.common,
+ &bus_r_uart0_clk.common,
+ &bus_r_uart1_clk.common,
+ &bus_r_i2c0_clk.common,
+ &bus_r_i2c1_clk.common,
+ &bus_r_i2c2_clk.common,
+ &bus_r_ppu0_clk.common,
+ &bus_r_ppu1_clk.common,
+ &bus_r_cpu_bist_clk.common,
+ &r_ir_rx_clk.common,
+ &bus_r_ir_rx_clk.common,
+ &bus_r_dma_clk.common,
+ &bus_r_rtc_clk.common,
+ &bus_r_cpucfg_clk.common,
+};
+
+static struct clk_hw_onecell_data sun55i_a523_r_hw_clks = {
+ .num = CLK_NUMBER,
+ .hws = {
+ [CLK_R_AHB] = &r_ahb_clk.common.hw,
+ [CLK_R_APB0] = &r_apb0_clk.common.hw,
+ [CLK_R_APB1] = &r_apb1_clk.common.hw,
+ [CLK_R_TIMER0] = &r_cpu_timer0.common.hw,
+ [CLK_R_TIMER1] = &r_cpu_timer1.common.hw,
+ [CLK_R_TIMER2] = &r_cpu_timer2.common.hw,
+ [CLK_BUS_R_TIMER] = &bus_r_timer_clk.common.hw,
+ [CLK_BUS_R_TWD] = &bus_r_twd_clk.common.hw,
+ [CLK_R_PWMCTRL] = &r_pwmctrl_clk.common.hw,
+ [CLK_BUS_R_PWMCTRL] = &bus_r_pwmctrl_clk.common.hw,
+ [CLK_BUS_R_SPI] = &bus_r_spi_clk.common.hw,
+ [CLK_BUS_R_SPINLOCK] = &bus_r_spinlock_clk.common.hw,
+ [CLK_BUS_R_MSGBOX] = &bus_r_msgbox_clk.common.hw,
+ [CLK_BUS_R_UART0] = &bus_r_uart0_clk.common.hw,
+ [CLK_BUS_R_UART1] = &bus_r_uart1_clk.common.hw,
+ [CLK_BUS_R_I2C0] = &bus_r_i2c0_clk.common.hw,
+ [CLK_BUS_R_I2C1] = &bus_r_i2c1_clk.common.hw,
+ [CLK_BUS_R_I2C2] = &bus_r_i2c2_clk.common.hw,
+ [CLK_BUS_R_PPU0] = &bus_r_ppu0_clk.common.hw,
+ [CLK_BUS_R_PPU1] = &bus_r_ppu1_clk.common.hw,
+ [CLK_BUS_R_CPU_BIST] = &bus_r_cpu_bist_clk.common.hw,
+ [CLK_R_IR_RX] = &r_ir_rx_clk.common.hw,
+ [CLK_BUS_R_IR_RX] = &bus_r_ir_rx_clk.common.hw,
+ [CLK_BUS_R_DMA] = &bus_r_dma_clk.common.hw,
+ [CLK_BUS_R_RTC] = &bus_r_rtc_clk.common.hw,
+ [CLK_BUS_R_CPUCFG] = &bus_r_cpucfg_clk.common.hw,
+ },
+};
+
+static struct ccu_reset_map sun55i_a523_r_ccu_resets[] = {
+ [RST_BUS_R_TIMER] = { 0x11c, BIT(16) },
+ [RST_BUS_R_TWD] = { 0x12c, BIT(16) },
+ [RST_BUS_R_PWMCTRL] = { 0x13c, BIT(16) },
+ [RST_BUS_R_SPI] = { 0x15c, BIT(16) },
+ [RST_BUS_R_SPINLOCK] = { 0x16c, BIT(16) },
+ [RST_BUS_R_MSGBOX] = { 0x17c, BIT(16) },
+ [RST_BUS_R_UART0] = { 0x18c, BIT(16) },
+ [RST_BUS_R_UART1] = { 0x18c, BIT(17) },
+ [RST_BUS_R_I2C0] = { 0x19c, BIT(16) },
+ [RST_BUS_R_I2C1] = { 0x19c, BIT(17) },
+ [RST_BUS_R_I2C2] = { 0x19c, BIT(18) },
+ [RST_BUS_R_PPU1] = { 0x1ac, BIT(17) },
+ [RST_BUS_R_IR_RX] = { 0x1cc, BIT(16) },
+ [RST_BUS_R_RTC] = { 0x20c, BIT(16) },
+ [RST_BUS_R_CPUCFG] = { 0x22c, BIT(16) },
+};
+
+static const struct sunxi_ccu_desc sun55i_a523_r_ccu_desc = {
+ .ccu_clks = sun55i_a523_r_ccu_clks,
+ .num_ccu_clks = ARRAY_SIZE(sun55i_a523_r_ccu_clks),
+
+ .hw_clks = &sun55i_a523_r_hw_clks,
+
+ .resets = sun55i_a523_r_ccu_resets,
+ .num_resets = ARRAY_SIZE(sun55i_a523_r_ccu_resets),
+};
+
+static int sun55i_a523_r_ccu_probe(struct platform_device *pdev)
+{
+ void __iomem *reg;
+
+ reg = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(reg))
+ return PTR_ERR(reg);
+
+ return devm_sunxi_ccu_probe(&pdev->dev, reg, &sun55i_a523_r_ccu_desc);
+}
+
+static const struct of_device_id sun55i_a523_r_ccu_ids[] = {
+ { .compatible = "allwinner,sun55i-a523-r-ccu" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, sun55i_a523_r_ccu_ids);
+
+static struct platform_driver sun55i_a523_r_ccu_driver = {
+ .probe = sun55i_a523_r_ccu_probe,
+ .driver = {
+ .name = "sun55i-a523-r-ccu",
+ .suppress_bind_attrs = true,
+ .of_match_table = sun55i_a523_r_ccu_ids,
+ },
+};
+module_platform_driver(sun55i_a523_r_ccu_driver);
+
+MODULE_IMPORT_NS("SUNXI_CCU");
+MODULE_DESCRIPTION("Support for the Allwinner A523 PRCM CCU");
+MODULE_LICENSE("GPL");
diff --git a/drivers/clk/sunxi-ng/ccu-sun55i-a523-r.h b/drivers/clk/sunxi-ng/ccu-sun55i-a523-r.h
new file mode 100644
index 0000000000000..d50f46ac4f3fe
--- /dev/null
+++ b/drivers/clk/sunxi-ng/ccu-sun55i-a523-r.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 2024 Arm Ltd.
+ */
+
+#ifndef _CCU_SUN55I_A523_R_H
+#define _CCU_SUN55I_A523_R_H
+
+#include <dt-bindings/clock/sun55i-a523-r-ccu.h>
+#include <dt-bindings/reset/sun55i-a523-r-ccu.h>
+
+#define CLK_NUMBER (CLK_BUS_R_CPUCFG + 1)
+
+#endif /* _CCU_SUN55I_A523_R_H */
--
2.46.3