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/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 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>; + }; }; }; 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_ */ 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"); 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_ */ 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)