From fb35b5404216007bb38bdac936640a89590aa1c4 Mon Sep 17 00:00:00 2001 From: Junhui Liu Date: Thu, 14 May 2026 17:27:17 +0800 Subject: [PATCH 1/6] clk: correct clk_div_mask() return value for width == 32 The macro clk_div_mask() currently wraps to zero when width is 32 due to 1 << 32 being undefined behavior. This leads to incorrect mask generation and prevents correct retrieval of register field values for 32-bit-wide dividers. Although it is unlikely to exhaust all U32_MAX div, some clock IPs may rely on a 32-bit val entry in their div_table to match a div, so providing a full 32-bit mask is necessary. Fix this by using the standard GENMASK() macro. This safely resolves the undefined behavior on both 32-bit and 64-bit architectures, while also benefiting from the built-in compile-time type and bounds checking provided by the GENMASK() macro. Cc: Troy Mitchell Cc: Brian Masney Signed-off-by: Junhui Liu Signed-off-by: Linux RISC-V bot --- include/linux/clk-provider.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index b01a38fef8cf26..b986cc054d827d 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -6,6 +6,7 @@ #ifndef __LINUX_CLK_PROVIDER_H #define __LINUX_CLK_PROVIDER_H +#include #include #include @@ -714,7 +715,7 @@ struct clk_divider { spinlock_t *lock; }; -#define clk_div_mask(width) ((1 << (width)) - 1) +#define clk_div_mask(width) GENMASK((width) - 1, 0) #define to_clk_divider(_hw) container_of(_hw, struct clk_divider, hw) #define CLK_DIVIDER_ONE_BASED BIT(0) From 3ff7150ad22e92fb6dad78a93ce532b08f3cf900 Mon Sep 17 00:00:00 2001 From: Junhui Liu Date: Thu, 14 May 2026 17:27:18 +0800 Subject: [PATCH 2/6] dt-bindings: clock: add Anlogic DR1V90 CRU Add the Clock and Reset Unit (CRU) support for the Anlogic DR1V90 SoC, which is responsible for clock and reset management. Reviewed-by: Conor Dooley Signed-off-by: Junhui Liu Signed-off-by: Linux RISC-V bot --- .../bindings/clock/anlogic,dr1v90-cru.yaml | 60 +++++++++++++++++++ .../dt-bindings/clock/anlogic,dr1v90-cru.h | 46 ++++++++++++++ .../dt-bindings/reset/anlogic,dr1v90-cru.h | 41 +++++++++++++ 3 files changed, 147 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/anlogic,dr1v90-cru.yaml create mode 100644 include/dt-bindings/clock/anlogic,dr1v90-cru.h create mode 100644 include/dt-bindings/reset/anlogic,dr1v90-cru.h diff --git a/Documentation/devicetree/bindings/clock/anlogic,dr1v90-cru.yaml b/Documentation/devicetree/bindings/clock/anlogic,dr1v90-cru.yaml new file mode 100644 index 00000000000000..11a92588e49494 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/anlogic,dr1v90-cru.yaml @@ -0,0 +1,60 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/clock/anlogic,dr1v90-cru.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Anlogic DR1V90 Clock and Reset Unit (CRU) + +maintainers: + - Junhui Liu + +properties: + compatible: + const: anlogic,dr1v90-cru + + reg: + maxItems: 1 + + clocks: + items: + - description: Main oscillator + - description: External CAN clock + - description: External WDT clock + + clock-names: + items: + - const: osc + - const: can_ext + - const: wdt_ext + + "#clock-cells": + const: 1 + description: + Refer for valid indices. + + "#reset-cells": + const: 1 + description: + Refer for valid indices. + +required: + - compatible + - reg + - clocks + - clock-names + - "#clock-cells" + - "#reset-cells" + +additionalProperties: false + +examples: + - | + clock-controller@f8801000 { + compatible = "anlogic,dr1v90-cru"; + reg = <0xf8801000 0x400>; + clocks = <&osc>, <&can_ext>, <&wdt_ext>; + clock-names = "osc", "can_ext", "wdt_ext"; + #clock-cells = <1>; + #reset-cells = <1>; + }; diff --git a/include/dt-bindings/clock/anlogic,dr1v90-cru.h b/include/dt-bindings/clock/anlogic,dr1v90-cru.h new file mode 100644 index 00000000000000..664daf3946a7bc --- /dev/null +++ b/include/dt-bindings/clock/anlogic,dr1v90-cru.h @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */ +/* + * Copyright (C) 2024-2025 Anlogic, Inc. + * Copyright (C) 2025 Junhui Liu + */ + +#ifndef _DT_BINDINGS_CLOCK_ANLOGIC_DR1V90_CRU_H_ +#define _DT_BINDINGS_CLOCK_ANLOGIC_DR1V90_CRU_H_ + +#define CLK_OSC_DIV2 0 +#define CLK_CPU_PLL 1 +#define CLK_CPU_PLL_4X 2 +#define CLK_CPU_4X 3 +#define CLK_CPU_2X 4 +#define CLK_CPU_1X 5 +#define CLK_IO_PLL 6 +#define CLK_IO_1000M 7 +#define CLK_IO_400M 8 +#define CLK_IO_25M 9 +#define CLK_IO_80M 10 +#define CLK_IO_400M_DIV2 11 +#define CLK_IO_400M_DIV4 12 +#define CLK_IO_400M_DIV8 13 +#define CLK_IO_400M_DIV16 14 +#define CLK_QSPI 15 +#define CLK_SPI 16 +#define CLK_SMC 17 +#define CLK_SDIO 18 +#define CLK_GPIO_DB 19 +#define CLK_EFUSE 20 +#define CLK_TVS 21 +#define CLK_TRNG 22 +#define CLK_OSC_DIV 23 +#define CLK_PWM 24 +#define CLK_FCLK0 25 +#define CLK_FCLK1 26 +#define CLK_FCLK2 27 +#define CLK_FCLK3 28 +#define CLK_WDT_SEL 29 +#define CLK_EFUSE_SEL 30 +#define CLK_CAN_SEL 31 +#define CLK_CPU_SEL 32 +#define CLK_CAN0 33 +#define CLK_CAN1 34 + +#endif /* _DT_BINDINGS_CLOCK_ANLOGIC_DR1V90_CRU_H_ */ diff --git a/include/dt-bindings/reset/anlogic,dr1v90-cru.h b/include/dt-bindings/reset/anlogic,dr1v90-cru.h new file mode 100644 index 00000000000000..c5b7aae1ab6ac7 --- /dev/null +++ b/include/dt-bindings/reset/anlogic,dr1v90-cru.h @@ -0,0 +1,41 @@ +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */ +/* + * Copyright (C) 2025 Junhui Liu + */ + +#ifndef _DT_BINDINGS_RESET_ANLOGIC_DR1V90_CRU_H_ +#define _DT_BINDINGS_RESET_ANLOGIC_DR1V90_CRU_H_ + +#define RESET_OCM 0 +#define RESET_QSPI 1 +#define RESET_SMC 2 +#define RESET_WDT 3 +#define RESET_DMAC_AXI 4 +#define RESET_DMAC_AHB 5 +#define RESET_NPU 6 +#define RESET_JPU 7 +#define RESET_DDRBUS 8 +#define RESET_NIC_HP0 9 +#define RESET_NIC_HP1 10 +#define RESET_NIC_GP0M 11 +#define RESET_NIC_GP1M 12 +#define RESET_GPIO 13 +#define RESET_IPC 14 +#define RESET_USB0 15 +#define RESET_USB1 16 +#define RESET_GBE0 17 +#define RESET_GBE1 18 +#define RESET_SDIO0 19 +#define RESET_SDIO1 20 +#define RESET_UART0 21 +#define RESET_UART1 22 +#define RESET_SPI0 23 +#define RESET_SPI1 24 +#define RESET_CAN0 25 +#define RESET_CAN1 26 +#define RESET_TTC0 27 +#define RESET_TTC1 28 +#define RESET_I2C0 29 +#define RESET_I2C1 30 + +#endif /* _DT_BINDINGS_RESET_ANLOGIC_DR1V90_CRU_H_ */ From de526b32a75b4a385f81ecff33f420332d7e54e4 Mon Sep 17 00:00:00 2001 From: Junhui Liu Date: Thu, 14 May 2026 17:27:19 +0800 Subject: [PATCH 3/6] clk: anlogic: add cru support for Anlogic DR1V90 SoC The Clock and Reset Unit (CRU) in the Anlogic DR1V90 SoC provides management for the clock and reset. The clock driver includes support for: - Generic clocks: fixed-factor, divider, mux and gate. - PLL: "nm" type (parent * n / m) and "c" type (parent / c). These PLLs are set up by the FSBL and mared as "don't touch" in the datasheet, so only the recal_rate() op is provided. - Divider with gate: support both division and gating (by setting value to 0); some of them require a minimum divider value to avoid timing issues. This also prepares the structure for the reset controller support, registering an auxiliary device for resets. Signed-off-by: Junhui Liu Signed-off-by: Linux RISC-V bot --- drivers/clk/Kconfig | 1 + drivers/clk/Makefile | 1 + drivers/clk/anlogic/Kconfig | 21 +++ drivers/clk/anlogic/Makefile | 7 + drivers/clk/anlogic/cru-dr1v90.c | 192 ++++++++++++++++++++++++++ drivers/clk/anlogic/cru_dr1.c | 226 +++++++++++++++++++++++++++++++ drivers/clk/anlogic/cru_dr1.h | 117 ++++++++++++++++ 7 files changed, 565 insertions(+) create mode 100644 drivers/clk/anlogic/Kconfig create mode 100644 drivers/clk/anlogic/Makefile create mode 100644 drivers/clk/anlogic/cru-dr1v90.c create mode 100644 drivers/clk/anlogic/cru_dr1.c create mode 100644 drivers/clk/anlogic/cru_dr1.h diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index b2efbe9f6acb0d..0eacde13c40d43 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -501,6 +501,7 @@ config COMMON_CLK_RPMI source "drivers/clk/actions/Kconfig" source "drivers/clk/analogbits/Kconfig" +source "drivers/clk/anlogic/Kconfig" source "drivers/clk/aspeed/Kconfig" source "drivers/clk/bcm/Kconfig" source "drivers/clk/eswin/Kconfig" diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index a3e2862ebd7eb5..814d5531f31392 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -112,6 +112,7 @@ obj-$(CONFIG_COMMON_CLK_XGENE) += clk-xgene.o # please keep this section sorted lexicographically by directory path name obj-y += actions/ obj-y += analogbits/ +obj-y += anlogic/ obj-y += aspeed/ obj-$(CONFIG_COMMON_CLK_AT91) += at91/ obj-$(CONFIG_ARCH_ARTPEC) += axis/ diff --git a/drivers/clk/anlogic/Kconfig b/drivers/clk/anlogic/Kconfig new file mode 100644 index 00000000000000..b3b17540176d46 --- /dev/null +++ b/drivers/clk/anlogic/Kconfig @@ -0,0 +1,21 @@ +# SPDX-License-Identifier: GPL-2.0-only + +config ANLOGIC_DR1_CRU + tristate "Clock support for Anlogic DR1 series SoCs" + depends on ARCH_ANLOGIC || COMPILE_TEST + select AUXILIARY_BUS + default ARCH_ANLOGIC + help + Say Y to enable clock controller unit support for Anlogic DR1 series + SoCs. + +if ANLOGIC_DR1_CRU + +config ANLOGIC_DR1V90_CRU + tristate "Anlogic DR1V90 clock support" + depends on ARCH_ANLOGIC || COMPILE_TEST + default ARCH_ANLOGIC + help + Support for the Clock and Reset Unit in Anlogic DR1V90 SoCs. + +endif diff --git a/drivers/clk/anlogic/Makefile b/drivers/clk/anlogic/Makefile new file mode 100644 index 00000000000000..fab7f29bb09758 --- /dev/null +++ b/drivers/clk/anlogic/Makefile @@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0-only + +obj-$(CONFIG_ANLOGIC_DR1_CRU) += anlogic-dr1-cru.o +anlogic-dr1-cru-y += cru_dr1.o + +obj-$(CONFIG_ANLOGIC_DR1V90_CRU) += anlogic-dr1v90-cru.o +anlogic-dr1v90-cru-y += cru-dr1v90.o diff --git a/drivers/clk/anlogic/cru-dr1v90.c b/drivers/clk/anlogic/cru-dr1v90.c new file mode 100644 index 00000000000000..b513dfba3dbd97 --- /dev/null +++ b/drivers/clk/anlogic/cru-dr1v90.c @@ -0,0 +1,192 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2024-2025 Anlogic, Inc. + * Copyright (C) 2026 Junhui Liu + */ + +#include +#include +#include +#include +#include + +#include "cru_dr1.h" + +#include + +static const struct clk_div_table cru_div_table_24[] = { + { 0xFFFFFF, 1 }, { 0x555555, 2 }, { 0x249249, 3 }, { 0x111111, 4 }, + { 0x084210, 5 }, { 0x041041, 6 }, { 0x020408, 7 }, { 0x010101, 8 }, + { 0x008040, 9 }, { 0x004010, 10 }, { 0x002004, 11 }, { 0x001001, 12 }, + { 0x000800, 13 }, { 0x000400, 14 }, { 0x000200, 15 }, { 0x000100, 16 }, + { 0x000080, 17 }, { 0x000040, 18 }, { 0x000020, 19 }, { 0x000010, 20 }, + { 0x000008, 21 }, { 0x000004, 22 }, { 0x000002, 23 }, { 0x000001, 24 }, + { /* sentinel */ } +}; + +static const struct clk_div_table cru_div_table_32[] = { + { 0xFFFFFFFF, 1 }, { 0x55555555, 2 }, { 0x24924924, 3 }, + { 0x11111111, 4 }, { 0x08421084, 5 }, { 0x04104104, 6 }, + { 0x02040810, 7 }, { 0x01010101, 8 }, { 0x00804020, 9 }, + { 0x00401004, 10 }, { 0x00200400, 11 }, { 0x00100100, 12 }, + { 0x00080040, 13 }, { 0x00040010, 14 }, { 0x00020004, 15 }, + { 0x00010001, 16 }, { 0x00008000, 17 }, { 0x00004000, 18 }, + { 0x00002000, 19 }, { 0x00001000, 20 }, { 0x00000800, 21 }, + { 0x00000400, 22 }, { 0x00000200, 23 }, { 0x00000100, 24 }, + { 0x00000080, 25 }, { 0x00000040, 26 }, { 0x00000020, 27 }, + { 0x00000010, 28 }, { 0x00000008, 29 }, { 0x00000004, 30 }, + { 0x00000002, 31 }, { 0x00000001, 32 }, { /* sentinel */ } +}; + +CLK_FIXED_FACTOR_FW_NAME(osc_div2, "osc_div2", "osc", 2, 1, 0); + +CRU_PLL_NM_DEFINE(cpu_pll, CRU_PARENT_NAME(osc), 0x120); +CRU_PLL_C_DEFINE(cpu_pll_4x, CRU_PARENT_HW(cpu_pll), 0x14c); + +CRU_DIV_DEFINE(cpu_4x_div1, CRU_PARENT_HW(cpu_pll_4x), 0x010, 0, 24, + cru_div_table_24, CLK_DIVIDER_READ_ONLY); +CRU_DIV_DEFINE(cpu_4x_div2, CRU_PARENT_HW(cpu_pll_4x), 0x014, 0, 24, + cru_div_table_24, CLK_DIVIDER_READ_ONLY); +CRU_DIV_DEFINE(cpu_4x_div4, CRU_PARENT_HW(cpu_pll_4x), 0x018, 0, 24, + cru_div_table_24, CLK_DIVIDER_READ_ONLY); + +CRU_PLL_NM_DEFINE(io_pll, CRU_PARENT_NAME(osc), 0x220); +CRU_PLL_C_DEFINE(io_1000m, CRU_PARENT_HW(io_pll), 0x248); +CRU_PLL_C_DEFINE(io_400m, CRU_PARENT_HW(io_pll), 0x24c); +CRU_PLL_C_DEFINE(io_25m, CRU_PARENT_HW(io_pll), 0x250); +CRU_PLL_C_DEFINE(io_80m, CRU_PARENT_HW(io_pll), 0x254); + +CRU_DIV_DEFINE(io_400m_div2, CRU_PARENT_HW(io_400m), 0x020, 0, 32, + cru_div_table_32, CLK_DIVIDER_READ_ONLY); +CRU_DIV_DEFINE(io_400m_div4, CRU_PARENT_HW(io_400m), 0x024, 0, 32, + cru_div_table_32, CLK_DIVIDER_READ_ONLY); +CRU_DIV_DEFINE(io_400m_div8, CRU_PARENT_HW(io_400m), 0x028, 0, 32, + cru_div_table_32, CLK_DIVIDER_READ_ONLY); +CRU_DIV_DEFINE(io_400m_div16, CRU_PARENT_HW(io_400m), 0x02c, 0, 32, + cru_div_table_32, CLK_DIVIDER_READ_ONLY); + +CRU_DIV_GATE_DEFINE(qspi, CRU_PARENT_HW(io_1000m), 0x030, 0, 6, NULL, 0, 2); +CRU_DIV_GATE_DEFINE(spi, CRU_PARENT_HW(io_1000m), 0x030, 8, 6, NULL, 0, 4); +CRU_DIV_GATE_DEFINE(smc, CRU_PARENT_HW(io_1000m), 0x030, 16, 6, NULL, 0, 4); +CRU_DIV_DEFINE(sdio, CRU_PARENT_HW(io_400m), 0x030, 24, 6, NULL, 0); + +CRU_DIV_GATE_DEFINE(gpio_db, CRU_PARENT_HW(io_25m), 0x034, 0, 6, NULL, 0, 1); +CRU_DIV_GATE_DEFINE(efuse, CRU_PARENT_HW(io_25m), 0x034, 8, 6, NULL, 0, 1); +CRU_DIV_GATE_DEFINE(tvs, CRU_PARENT_HW(io_25m), 0x034, 16, 6, NULL, 0, 1); +CRU_DIV_GATE_DEFINE(trng, CRU_PARENT_HW(io_25m), 0x034, 24, 7, NULL, 0, 1); + +CRU_DIV_GATE_DEFINE(osc_div, CRU_PARENT_NAME(osc), 0x038, 0, 6, NULL, 0, 1); +CRU_DIV_GATE_DEFINE(pwm, CRU_PARENT_NAME(osc), 0x038, 8, 12, NULL, 0, 1); + +CRU_DIV_GATE_DEFINE(fclk0, CRU_PARENT_HW(io_400m), 0x03c, 0, 6, NULL, 0, 1); +CRU_DIV_GATE_DEFINE(fclk1, CRU_PARENT_HW(io_400m), 0x03c, 8, 6, NULL, 0, 1); +CRU_DIV_GATE_DEFINE(fclk2, CRU_PARENT_HW(io_400m), 0x03c, 16, 6, NULL, 0, 1); +CRU_DIV_GATE_DEFINE(fclk3, CRU_PARENT_HW(io_400m), 0x03c, 24, 6, NULL, 0, 1); + +static const struct clk_parent_data wdt_parents[] = { + CRU_PARENT_HW(osc_div2), + CRU_PARENT_NAME(wdt_ext) +}; +CRU_MUX_DEFINE(wdt_sel, wdt_parents, 0x040, 1, 1); + +static const struct clk_parent_data efuse_parents[] = { + CRU_PARENT_NAME(osc), + CRU_PARENT_DIV_HW(efuse) +}; +CRU_MUX_DEFINE(efuse_sel, efuse_parents, 0x040, 2, 1); + +static const struct clk_parent_data can_parents[] = { + CRU_PARENT_HW(io_80m), + CRU_PARENT_NAME(can_ext) +}; +CRU_MUX_DEFINE(can_sel, can_parents, 0x040, 3, 1); + +static const struct clk_parent_data cpu_parents[] = { + CRU_PARENT_HW(cpu_4x_div1), + CRU_PARENT_HW(cpu_4x_div2) +}; +CRU_MUX_DEFINE(cpu_sel, cpu_parents, 0x040, 5, 1); + +CRU_GATE_DEFINE(can0, CRU_PARENT_HW(can_sel), 0x08c, 20, CLK_GATE_SET_TO_DISABLE); +CRU_GATE_DEFINE(can1, CRU_PARENT_HW(can_sel), 0x08c, 21, CLK_GATE_SET_TO_DISABLE); + +static const struct cru_clk dr1v90_cru_clks[] = { + [CLK_OSC_DIV2] = { &osc_div2.hw, NULL }, + [CLK_CPU_PLL] = { &cpu_pll.hw, &cpu_pll.reg }, + [CLK_CPU_PLL_4X] = { &cpu_pll_4x.hw, &cpu_pll_4x.reg }, + [CLK_CPU_4X] = { &cpu_4x_div1.hw, &cpu_4x_div1.reg }, + [CLK_CPU_2X] = { &cpu_4x_div2.hw, &cpu_4x_div2.reg }, + [CLK_CPU_1X] = { &cpu_4x_div4.hw, &cpu_4x_div4.reg }, + [CLK_IO_PLL] = { &io_pll.hw, &io_pll.reg }, + [CLK_IO_1000M] = { &io_1000m.hw, &io_1000m.reg }, + [CLK_IO_400M] = { &io_400m.hw, &io_400m.reg }, + [CLK_IO_25M] = { &io_25m.hw, &io_25m.reg }, + [CLK_IO_80M] = { &io_80m.hw, &io_80m.reg }, + [CLK_IO_400M_DIV2] = { &io_400m_div2.hw, &io_400m_div2.reg }, + [CLK_IO_400M_DIV4] = { &io_400m_div4.hw, &io_400m_div4.reg }, + [CLK_IO_400M_DIV8] = { &io_400m_div8.hw, &io_400m_div8.reg }, + [CLK_IO_400M_DIV16] = { &io_400m_div16.hw, &io_400m_div16.reg }, + [CLK_QSPI] = { &qspi.divider.hw, &qspi.divider.reg }, + [CLK_SPI] = { &spi.divider.hw, &spi.divider.reg }, + [CLK_SMC] = { &smc.divider.hw, &smc.divider.reg }, + [CLK_SDIO] = { &sdio.hw, &sdio.reg }, + [CLK_GPIO_DB] = { &gpio_db.divider.hw, &gpio_db.divider.reg }, + [CLK_EFUSE] = { &efuse.divider.hw, &efuse.divider.reg }, + [CLK_TVS] = { &tvs.divider.hw, &tvs.divider.reg }, + [CLK_TRNG] = { &trng.divider.hw, &trng.divider.reg }, + [CLK_OSC_DIV] = { &osc_div.divider.hw, &osc_div.divider.reg }, + [CLK_PWM] = { &pwm.divider.hw, &pwm.divider.reg }, + [CLK_FCLK0] = { &fclk0.divider.hw, &fclk0.divider.reg }, + [CLK_FCLK1] = { &fclk1.divider.hw, &fclk1.divider.reg }, + [CLK_FCLK2] = { &fclk2.divider.hw, &fclk2.divider.reg }, + [CLK_FCLK3] = { &fclk3.divider.hw, &fclk3.divider.reg }, + [CLK_WDT_SEL] = { &wdt_sel.hw, &wdt_sel.reg }, + [CLK_EFUSE_SEL] = { &efuse_sel.hw, &efuse_sel.reg }, + [CLK_CAN_SEL] = { &can_sel.hw, &can_sel.reg }, + [CLK_CPU_SEL] = { &cpu_sel.hw, &cpu_sel.reg }, + [CLK_CAN0] = { &can0.hw, &can0.reg }, + [CLK_CAN1] = { &can1.hw, &can1.reg } +}; + +static int dr1v90_cru_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + void __iomem *base; + int ret; + + base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(base)) + return PTR_ERR(base); + + ret = dr1_cru_clk_register(dev, base, dr1v90_cru_clks, + ARRAY_SIZE(dr1v90_cru_clks)); + if (ret) + return dev_err_probe(dev, ret, "failed to register clocks\n"); + + ret = dr1_cru_reset_register(dev, base); + if (ret) + return dev_err_probe(dev, ret, "failed to register resets\n"); + + return 0; +} + +static const struct of_device_id dr1v90_cru_ids[] = { + { .compatible = "anlogic,dr1v90-cru" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, dr1v90_cru_ids); + +static struct platform_driver dr1v90_cru_driver = { + .driver = { + .name = "dr1v90-cru", + .of_match_table = dr1v90_cru_ids, + }, + .probe = dr1v90_cru_probe, +}; +module_platform_driver(dr1v90_cru_driver); + +MODULE_AUTHOR("Fushan Zeng "); +MODULE_AUTHOR("Junhui Liu "); +MODULE_DESCRIPTION("Anlogic DR1V90 CRU driver"); +MODULE_IMPORT_NS("CLK_ANLOGIC"); +MODULE_LICENSE("GPL"); diff --git a/drivers/clk/anlogic/cru_dr1.c b/drivers/clk/anlogic/cru_dr1.c new file mode 100644 index 00000000000000..10f8751a88383d --- /dev/null +++ b/drivers/clk/anlogic/cru_dr1.c @@ -0,0 +1,226 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2024-2025 Anlogic, Inc. + * Copyright (C) 2026 Junhui Liu + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "cru_dr1.h" + +static unsigned long cru_pll_nm_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct cru_pll *pll = hw_to_cru_pll(hw); + u32 mult, div; + + div = FIELD_GET(GENMASK(6, 0), readl(pll->reg)) + 1; + mult = FIELD_GET(GENMASK(6, 0), readl(pll->reg + 4)) + 1; + + return parent_rate * mult / div; +} + +const struct clk_ops dr1_cru_pll_nm_ops = { + .recalc_rate = cru_pll_nm_recalc_rate, +}; +EXPORT_SYMBOL_NS_GPL(dr1_cru_pll_nm_ops, "CLK_ANLOGIC"); + +static unsigned long cru_pll_c_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct cru_pll *pll = hw_to_cru_pll(hw); + u32 div; + + div = FIELD_GET(GENMASK(30, 24), readl(pll->reg)) + 1; + + return parent_rate / div; +} + +const struct clk_ops dr1_cru_pll_c_ops = { + .recalc_rate = cru_pll_c_recalc_rate, +}; +EXPORT_SYMBOL_NS_GPL(dr1_cru_pll_c_ops, "CLK_ANLOGIC"); + +static void cru_div_gate_endisable(struct clk_hw *hw, int enable) +{ + struct cru_div_gate *div_gate = hw_to_cru_div_gate(hw); + struct clk_divider *divider = &div_gate->divider; + u32 reg; + + reg = readl(divider->reg); + reg &= ~(clk_div_mask(divider->width) << divider->shift); + + if (enable) + reg |= div_gate->val << divider->shift; + + writel(reg, divider->reg); +} + +static int cru_div_gate_enable(struct clk_hw *hw) +{ + cru_div_gate_endisable(hw, 1); + + return 0; +} + +static void cru_div_gate_disable(struct clk_hw *hw) +{ + cru_div_gate_endisable(hw, 0); +} + +static int cru_div_gate_is_enabled(struct clk_hw *hw) +{ + struct cru_div_gate *div_gate = hw_to_cru_div_gate(hw); + struct clk_divider *divider = &div_gate->divider; + u32 val; + + val = readl(divider->reg) >> divider->shift; + val &= clk_div_mask(divider->width); + + return !!val; +} + +static unsigned long cru_div_gate_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct cru_div_gate *div_gate = hw_to_cru_div_gate(hw); + struct clk_divider *divider = &div_gate->divider; + unsigned int val; + + val = readl(divider->reg) >> divider->shift; + val &= clk_div_mask(divider->width); + + if (val < div_gate->min) + return 0; + + return divider_recalc_rate(hw, parent_rate, val, divider->table, + divider->flags, divider->width); +} + +static int cru_div_gate_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct cru_div_gate *div_gate = hw_to_cru_div_gate(hw); + struct clk_divider *divider = &div_gate->divider; + unsigned long maxdiv, mindiv; + int div = 0; + + maxdiv = clk_div_mask(divider->width) + 1; + mindiv = div_gate->min + 1; + + div = DIV_ROUND_UP_ULL(req->best_parent_rate, req->rate); + div = div > maxdiv ? maxdiv : div; + div = div < mindiv ? mindiv : div; + + req->rate = DIV_ROUND_UP_ULL(req->best_parent_rate, div); + + return 0; +} + +static int cru_div_gate_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct cru_div_gate *div_gate = hw_to_cru_div_gate(hw); + struct clk_divider *divider = &div_gate->divider; + int value; + u32 reg; + + if (!__clk_is_enabled(hw->clk)) + return 0; + + value = divider_get_val(rate, parent_rate, divider->table, + divider->width, divider->flags); + if (value < 0) + return value; + + if (value < div_gate->min) + value = div_gate->min; + + reg = readl(divider->reg); + reg &= ~(clk_div_mask(divider->width) << divider->shift); + reg |= (u32)value << divider->shift; + writel(reg, divider->reg); + + div_gate->val = value; + + return 0; +} + +static int cru_div_gate_init(struct clk_hw *hw) +{ + struct cru_div_gate *div_gate = hw_to_cru_div_gate(hw); + struct clk_divider *divider = &div_gate->divider; + u32 val; + + val = readl(divider->reg) >> divider->shift; + val &= clk_div_mask(divider->width); + div_gate->val = val; + + return 0; +} + +const struct clk_ops dr1_cru_div_gate_ops = { + .enable = cru_div_gate_enable, + .disable = cru_div_gate_disable, + .is_enabled = cru_div_gate_is_enabled, + .recalc_rate = cru_div_gate_recalc_rate, + .determine_rate = cru_div_gate_determine_rate, + .set_rate = cru_div_gate_set_rate, + .init = cru_div_gate_init, +}; +EXPORT_SYMBOL_NS_GPL(dr1_cru_div_gate_ops, "CLK_ANLOGIC"); + +int dr1_cru_clk_register(struct device *dev, void __iomem *base, + const struct cru_clk *clks, int nr_clks) +{ + struct clk_hw_onecell_data *priv; + int i, ret; + + priv = devm_kzalloc(dev, struct_size(priv, hws, nr_clks), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + for (i = 0; i < nr_clks; i++) { + const struct cru_clk *clk = &clks[i]; + + if (clk->reg) + *(clk->reg) += (uintptr_t)base; + + ret = devm_clk_hw_register(dev, clk->hw); + if (ret) + return ret; + + priv->hws[i] = clk->hw; + } + + priv->num = nr_clks; + + ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, priv); + if (ret) + dev_err(dev, "failed to add clock hardware provider\n"); + + return ret; +} +EXPORT_SYMBOL_NS_GPL(dr1_cru_clk_register, "CLK_ANLOGIC"); + +int dr1_cru_reset_register(struct device *dev, void __iomem *base) +{ + struct auxiliary_device *adev; + + adev = devm_auxiliary_device_create(dev, "reset", base); + if (!adev) + return -ENODEV; + + return 0; +} +EXPORT_SYMBOL_NS_GPL(dr1_cru_reset_register, "CLK_ANLOGIC"); + +MODULE_DESCRIPTION("Anlogic DR1 CRU driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/clk/anlogic/cru_dr1.h b/drivers/clk/anlogic/cru_dr1.h new file mode 100644 index 00000000000000..5386aed9e9f3f0 --- /dev/null +++ b/drivers/clk/anlogic/cru_dr1.h @@ -0,0 +1,117 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2024-2025 Anlogic, Inc. + * Copyright (C) 2026 Junhui Liu + */ + +#ifndef _CRU_DR1_H_ +#define _CRU_DR1_H_ + +#include + +struct cru_pll { + struct clk_hw hw; + void __iomem *reg; +}; + +struct cru_div_gate { + struct clk_divider divider; + u32 val; /* Cached divider value for restoring on enable */ + u8 min; /* Minimum divider value to avoid timing issues */ +}; + +struct cru_clk { + struct clk_hw *hw; + void **reg; +}; + +#define CRU_PARENT_NAME(_name) { .fw_name = #_name } +#define CRU_PARENT_HW(_parent) { .hw = &_parent.hw } +#define CRU_PARENT_DIV_HW(_parent) { .hw = &_parent.divider.hw } + +#define CRU_INITHW(_name, _parent, _ops) \ + .hw.init = &(struct clk_init_data) { \ + .name = #_name, \ + .parent_data = (const struct clk_parent_data[]) \ + { _parent }, \ + .num_parents = 1, \ + .ops = &_ops, \ + } + +#define CRU_INITHW_PARENTS(_name, _parents, _ops) \ + .hw.init = CLK_HW_INIT_PARENTS_DATA(#_name, _parents, &_ops, 0) + +#define CRU_PLL_NM_DEFINE(_name, _parent, _reg) \ +static struct cru_pll _name = { \ + .reg = (void __iomem *)(_reg), \ + CRU_INITHW(_name, _parent, dr1_cru_pll_nm_ops), \ +} + +#define CRU_PLL_C_DEFINE(_name, _parent, _reg) \ +static struct cru_pll _name = { \ + .reg = (void __iomem *)(_reg), \ + CRU_INITHW(_name, _parent, dr1_cru_pll_c_ops), \ +} + +#define CRU_DIV_DEFINE(_name, _parent, _reg, _shift, _width, _table, \ + _flags) \ +static struct clk_divider _name = { \ + .shift = _shift, \ + .width = _width, \ + .flags = _flags, \ + .table = _table, \ + .reg = (void __iomem *)(_reg), \ + CRU_INITHW(_name, _parent, clk_divider_ops), \ +} + +#define CRU_DIV_GATE_DEFINE(_name, _parent, _reg, _shift, _width, \ + _table, _flags, _min) \ +static struct cru_div_gate _name = { \ + .min = _min, \ + .divider = { \ + .shift = _shift, \ + .width = _width, \ + .flags = _flags, \ + .table = _table, \ + .reg = (void __iomem *)(_reg), \ + CRU_INITHW(_name, _parent, dr1_cru_div_gate_ops), \ + } \ +} + +#define CRU_MUX_DEFINE(_name, _parents, _reg, _shift, _width) \ +static struct clk_mux _name = { \ + .shift = _shift, \ + .mask = GENMASK(_width - 1, 0), \ + .reg = (void __iomem *)(_reg), \ + CRU_INITHW_PARENTS(_name, _parents, clk_mux_ops) \ +} + +#define CRU_GATE_DEFINE(_name, _parent, _reg, _bit_idx, _flags) \ +static struct clk_gate _name = { \ + .bit_idx = _bit_idx, \ + .flags = _flags, \ + .reg = (void __iomem *)(_reg), \ + CRU_INITHW(_name, _parent, clk_gate_ops) \ +} + +static inline struct cru_pll *hw_to_cru_pll(struct clk_hw *hw) +{ + return container_of(hw, struct cru_pll, hw); +} + +static inline struct cru_div_gate *hw_to_cru_div_gate(struct clk_hw *hw) +{ + struct clk_divider *divider = to_clk_divider(hw); + + return container_of(divider, struct cru_div_gate, divider); +} + +extern const struct clk_ops dr1_cru_pll_nm_ops; +extern const struct clk_ops dr1_cru_pll_c_ops; +extern const struct clk_ops dr1_cru_div_gate_ops; + +int dr1_cru_clk_register(struct device *dev, void __iomem *base, + const struct cru_clk *clks, int nr_clks); +int dr1_cru_reset_register(struct device *dev, void __iomem *base); + +#endif /* _CRU_DR1_H_ */ From 137c7138582c9d8aca3a724846c32b1521b608af Mon Sep 17 00:00:00 2001 From: Junhui Liu Date: Thu, 14 May 2026 17:27:20 +0800 Subject: [PATCH 4/6] reset: anlogic: add support for Anlogic DR1V90 resets Add reset controller support for the Anlogic DR1V90 SoC, which is an auxiliary device associated with the Clock and Reset Unit (CRU). All resets are active-low. Signed-off-by: Junhui Liu Signed-off-by: Linux RISC-V bot --- drivers/reset/Kconfig | 10 +++ drivers/reset/Makefile | 1 + drivers/reset/reset-dr1v90.c | 140 +++++++++++++++++++++++++++++++++++ 3 files changed, 151 insertions(+) create mode 100644 drivers/reset/reset-dr1v90.c diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig index d009eb0849a3bd..0bc1723224a481 100644 --- a/drivers/reset/Kconfig +++ b/drivers/reset/Kconfig @@ -73,6 +73,16 @@ config RESET_BRCMSTB_RESCAL This enables the RESCAL reset controller for SATA, PCIe0, or PCIe1 on BCM7216 or the BCM2712. +config RESET_DR1V90 + tristate "Anlogic DR1V90 reset controller" + depends on ARCH_ANLOGIC || COMPILE_TEST + depends on ANLOGIC_DR1V90_CRU + select AUXILIARY_BUS + default ARCH_ANLOGIC + help + This enables the reset controller driver for Anlogic DR1V90 SoCs + provided by the CRU unit. + config RESET_EIC7700 bool "Reset controller driver for ESWIN SoCs" depends on ARCH_ESWIN || COMPILE_TEST diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile index 3e52569bd2768c..ab2bbc917b7372 100644 --- a/drivers/reset/Makefile +++ b/drivers/reset/Makefile @@ -14,6 +14,7 @@ obj-$(CONFIG_RESET_BCM6345) += reset-bcm6345.o obj-$(CONFIG_RESET_BERLIN) += reset-berlin.o obj-$(CONFIG_RESET_BRCMSTB) += reset-brcmstb.o obj-$(CONFIG_RESET_BRCMSTB_RESCAL) += reset-brcmstb-rescal.o +obj-$(CONFIG_RESET_DR1V90) += reset-dr1v90.o obj-$(CONFIG_RESET_EIC7700) += reset-eic7700.o obj-$(CONFIG_RESET_EYEQ) += reset-eyeq.o obj-$(CONFIG_RESET_GPIO) += reset-gpio.o diff --git a/drivers/reset/reset-dr1v90.c b/drivers/reset/reset-dr1v90.c new file mode 100644 index 00000000000000..daa99c797b1af2 --- /dev/null +++ b/drivers/reset/reset-dr1v90.c @@ -0,0 +1,140 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2026 Junhui Liu + */ + +#include +#include +#include +#include +#include + +#include + +struct dr1v90_reset_map { + u32 offset; + u32 bit; +}; + +struct dr1v90_reset_controller { + struct reset_controller_dev rcdev; + void __iomem *base; + spinlock_t lock; /* protect register read-modify-write */ +}; + +static inline struct dr1v90_reset_controller * +to_dr1v90_reset_controller(struct reset_controller_dev *rcdev) +{ + return container_of(rcdev, struct dr1v90_reset_controller, rcdev); +} + +static const struct dr1v90_reset_map dr1v90_resets[] = { + [RESET_OCM] = { 0x74, BIT(4)}, + [RESET_QSPI] = { 0x74, BIT(5)}, + [RESET_SMC] = { 0x74, BIT(6)}, + [RESET_WDT] = { 0x74, BIT(7)}, + [RESET_DMAC_AXI] = { 0x74, BIT(8)}, + [RESET_DMAC_AHB] = { 0x74, BIT(9)}, + [RESET_NPU] = { 0x74, BIT(12)}, + [RESET_JPU] = { 0x74, BIT(13)}, + [RESET_DDRBUS] = { 0x74, BIT(14)}, + [RESET_NIC_HP0] = { 0x78, BIT(0)}, + [RESET_NIC_HP1] = { 0x78, BIT(1)}, + [RESET_NIC_GP0M] = { 0x78, BIT(4)}, + [RESET_NIC_GP1M] = { 0x78, BIT(5)}, + [RESET_GPIO] = { 0x78, BIT(8)}, + [RESET_IPC] = { 0x78, BIT(12)}, + [RESET_USB0] = { 0x7C, BIT(0)}, + [RESET_USB1] = { 0x7C, BIT(1)}, + [RESET_GBE0] = { 0x7C, BIT(4)}, + [RESET_GBE1] = { 0x7C, BIT(5)}, + [RESET_SDIO0] = { 0x7C, BIT(8)}, + [RESET_SDIO1] = { 0x7C, BIT(9)}, + [RESET_UART0] = { 0x7C, BIT(12)}, + [RESET_UART1] = { 0x7C, BIT(13)}, + [RESET_SPI0] = { 0x7C, BIT(16)}, + [RESET_SPI1] = { 0x7C, BIT(17)}, + [RESET_CAN0] = { 0x7C, BIT(20)}, + [RESET_CAN1] = { 0x7C, BIT(21)}, + [RESET_TTC0] = { 0x7C, BIT(24)}, + [RESET_TTC1] = { 0x7C, BIT(25)}, + [RESET_I2C0] = { 0x7C, BIT(28)}, + [RESET_I2C1] = { 0x7C, BIT(29)} +}; + +static int dr1v90_reset_control_update(struct reset_controller_dev *rcdev, + unsigned long id, bool assert) +{ + struct dr1v90_reset_controller *rstc = to_dr1v90_reset_controller(rcdev); + u32 offset = dr1v90_resets[id].offset; + u32 bit = dr1v90_resets[id].bit; + u32 reg; + + guard(spinlock_irqsave)(&rstc->lock); + + reg = readl(rstc->base + offset); + if (assert) + reg &= ~bit; + else + reg |= bit; + writel(reg, rstc->base + offset); + + return 0; +} + +static int dr1v90_reset_control_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return dr1v90_reset_control_update(rcdev, id, true); +} + +static int dr1v90_reset_control_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return dr1v90_reset_control_update(rcdev, id, false); +} + +static const struct reset_control_ops dr1v90_reset_control_ops = { + .assert = dr1v90_reset_control_assert, + .deassert = dr1v90_reset_control_deassert, +}; + +static int dr1v90_reset_probe(struct auxiliary_device *adev, + const struct auxiliary_device_id *id) +{ + struct dr1v90_reset_controller *rstc; + struct device *dev = &adev->dev; + + rstc = devm_kzalloc(dev, sizeof(*rstc), GFP_KERNEL); + if (!rstc) + return -ENOMEM; + + spin_lock_init(&rstc->lock); + + rstc->base = dev->platform_data; + rstc->rcdev.dev = dev; + rstc->rcdev.nr_resets = ARRAY_SIZE(dr1v90_resets); + rstc->rcdev.of_node = dev->parent->of_node; + rstc->rcdev.ops = &dr1v90_reset_control_ops; + rstc->rcdev.owner = THIS_MODULE; + + return devm_reset_controller_register(dev, &rstc->rcdev); +} + +static const struct auxiliary_device_id dr1v90_reset_ids[] = { + { + .name = "anlogic_dr1_cru.reset" + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(auxiliary, dr1v90_reset_ids); + +static struct auxiliary_driver dr1v90_reset_driver = { + .probe = dr1v90_reset_probe, + .id_table = dr1v90_reset_ids, +}; +module_auxiliary_driver(dr1v90_reset_driver); + +MODULE_AUTHOR("Junhui Liu "); +MODULE_DESCRIPTION("Anlogic DR1V90 reset controller driver"); +MODULE_LICENSE("GPL"); From 0388fbeee42b4da354560205cce924d9111f2812 Mon Sep 17 00:00:00 2001 From: Junhui Liu Date: Thu, 14 May 2026 17:27:21 +0800 Subject: [PATCH 5/6] riscv: dts: anlogic: add clocks and CRU for DR1V90 Add clocks and introduce the CRU (Clock and Reset) unit node for Anlogic DR1V90 SoC, providing both clock and reset support. The DR1V90 SoC uses three external clocks: - A crystal oscillator as the main system clock. - Two optional external clocks (via IO) for the CAN and WDT modules. The main crystal oscillator frequency is board-dependent. For the dr1v90-mlkpai-fs01 board, a 33.33 MHz oscillator is used and defined accordingly. Signed-off-by: Junhui Liu Signed-off-by: Linux RISC-V bot --- .../boot/dts/anlogic/dr1v90-mlkpai-fs01.dts | 4 ++ arch/riscv/boot/dts/anlogic/dr1v90.dtsi | 40 ++++++++++++++++++- 2 files changed, 42 insertions(+), 2 deletions(-) diff --git a/arch/riscv/boot/dts/anlogic/dr1v90-mlkpai-fs01.dts b/arch/riscv/boot/dts/anlogic/dr1v90-mlkpai-fs01.dts index 597407655efd2e..af78f1a4eeccb1 100644 --- a/arch/riscv/boot/dts/anlogic/dr1v90-mlkpai-fs01.dts +++ b/arch/riscv/boot/dts/anlogic/dr1v90-mlkpai-fs01.dts @@ -23,6 +23,10 @@ }; }; +&osc { + clock-frequency = <33333333>; +}; + &uart1 { status = "okay"; }; diff --git a/arch/riscv/boot/dts/anlogic/dr1v90.dtsi b/arch/riscv/boot/dts/anlogic/dr1v90.dtsi index 9fe183f5f5c8d3..574c6608aef014 100644 --- a/arch/riscv/boot/dts/anlogic/dr1v90.dtsi +++ b/arch/riscv/boot/dts/anlogic/dr1v90.dtsi @@ -3,6 +3,9 @@ * Copyright (C) 2025 Junhui Liu */ +#include +#include + /dts-v1/; / { #address-cells = <2>; @@ -40,6 +43,26 @@ }; }; + clocks { + can_ext: clock-ext-can { + compatible = "fixed-clock"; + clock-output-names = "can_ext"; + #clock-cells = <0>; + }; + + osc: clock-osc { + compatible = "fixed-clock"; + clock-output-names = "osc"; + #clock-cells = <0>; + }; + + wdt_ext: clock-ext-wdt { + compatible = "fixed-clock"; + clock-output-names = "wdt_ext"; + #clock-cells = <0>; + }; + }; + soc { compatible = "simple-bus"; interrupt-parent = <&plic>; @@ -81,21 +104,34 @@ uart0: serial@f8400000 { compatible = "anlogic,dr1v90-uart", "snps,dw-apb-uart"; reg = <0x0 0xf8400000 0x0 0x1000>; - clock-frequency = <50000000>; + clocks = <&cru CLK_IO_400M_DIV8>, <&cru CLK_CPU_1X>; + clock-names = "baudclk", "apb_pclk"; interrupts = <71>; reg-io-width = <4>; reg-shift = <2>; + resets = <&cru RESET_UART0>; status = "disabled"; }; uart1: serial@f8401000 { compatible = "anlogic,dr1v90-uart", "snps,dw-apb-uart"; reg = <0x0 0xf8401000 0x0 0x1000>; - clock-frequency = <50000000>; + clocks = <&cru CLK_IO_400M_DIV8>, <&cru CLK_CPU_1X>; + clock-names = "baudclk", "apb_pclk"; interrupts = <72>; reg-io-width = <4>; reg-shift = <2>; + resets = <&cru RESET_UART1>; status = "disabled"; }; + + cru: clock-controller@f8801000 { + compatible = "anlogic,dr1v90-cru"; + reg = <0x0 0xf8801000 0 0x400>; + clocks = <&osc>, <&can_ext>, <&wdt_ext>; + clock-names = "osc", "can_ext", "wdt_ext"; + #clock-cells = <1>; + #reset-cells = <1>; + }; }; }; From bbb104e4adc39ddee0eecaa95779fe8355cf0fff Mon Sep 17 00:00:00 2001 From: Junhui Liu Date: Thu, 14 May 2026 17:27:22 +0800 Subject: [PATCH 6/6] MAINTAINERS: Add Anlogic DR1V90 CRU driver entry Add a MAINTAINERS entry for the Anlogic DR1V90 Clock and Reset Unit (CRU) drivers. Signed-off-by: Junhui Liu Signed-off-by: Linux RISC-V bot --- MAINTAINERS | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 2fb1c75afd1638..4861bf96b99627 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1898,6 +1898,15 @@ M: Jiaxun Yang S: Supported F: drivers/rtc/rtc-goldfish.c +ANLOGIC DR1V90 CRU DRIVER +M: Junhui Liu +S: Maintained +F: Documentation/devicetree/bindings/clock/anlogic,dr1v90-cru.yaml +F: drivers/clk/anlogic/cru?dr1* +F: drivers/reset/reset-dr1v90.c +F: include/dt-bindings/clock/anlogic,dr1v90-cru.h +F: include/dt-bindings/reset/anlogic,dr1v90-cru.h + AOA (Apple Onboard Audio) ALSA DRIVER M: Johannes Berg L: linuxppc-dev@lists.ozlabs.org