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

Jernej Škrabec
2025-02-18T20:42:10Z

Dne petek, 14. februar 2025 ob 13:53:59 Srednjeevropski standardni čas je Andre Przywara napisal(a):
> 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" },

I believe pll-periph has /3 divider and pll-audio x4 multiplier.

> +};
> +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 */

Mux width is 2.

> + 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?) */

Missing SPI clock (reg 0x150).

Best regards,
Jernej

> +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 */
>