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CPG block handles the below operations: - Generation and control of clock signals for the IP modules - Generation and control of resets - Control over booting - Low power consumption and power supply domains Also define constants for the core clocks of the RZ/V2H(P) SoC. Note the core clocks are a subset of the ones which are listed as part of section 4.4.2 of HW manual Rev.1.01 which cannot be controlled by CLKON register. Signed-off-by: Lad Prabhakar Reviewed-by: Krzysztof Kozlowski Reviewed-by: Geert Uytterhoeven --- v3->v4 - Included RB tag form Krzysztof - Changed reset and clock values to hex - Renamed __DT_BINDINGS_CLOCK_R9A09G057_CPG_H__ to __DT_BINDINGS_CLOCK_RENESAS_R9A09G057_CPG_H__ v2->v3 - Dropped '|' for CPG description - Dropped description for '#power-domain-cells' property - Added 3 clock inputs for CPG - Dropped label in example node - Used 4 spaces for example node - Renamed r9a09g057-cpg.h -> renesas,r9a09g057-cpg.h - Merged adding renesas,r9a09g057-cpg.h in DT binding patch - Updated commit message v1->v2 - Updated commit message - Updated description for binding as suggested by Geert - Updated descriptions for clocks and resets property - Renamed extal->qextal - Updated '#power-domain-cells' value --- .../bindings/clock/renesas,rzv2h-cpg.yaml | 80 +++++++++++++++++++ .../dt-bindings/clock/renesas,r9a09g057-cpg.h | 21 +++++ 2 files changed, 101 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/renesas,rzv2h-cpg.yaml create mode 100644 include/dt-bindings/clock/renesas,r9a09g057-cpg.h diff --git a/Documentation/devicetree/bindings/clock/renesas,rzv2h-cpg.yaml b/Documentation/devicetree/bindings/clock/renesas,rzv2h-cpg.yaml new file mode 100644 index 000000000000..926c503bed1f --- /dev/null +++ b/Documentation/devicetree/bindings/clock/renesas,rzv2h-cpg.yaml @@ -0,0 +1,80 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/clock/renesas,rzv2h-cpg.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Renesas RZ/V2H(P) Clock Pulse Generator (CPG) + +maintainers: + - Lad Prabhakar + +description: + On Renesas RZ/V2H(P) SoCs, the CPG (Clock Pulse Generator) handles generation + and control of clock signals for the IP modules, generation and control of resets, + and control over booting, low power consumption and power supply domains. + +properties: + compatible: + const: renesas,r9a09g057-cpg + + reg: + maxItems: 1 + + clocks: + items: + - description: AUDIO_EXTAL clock input + - description: RTXIN clock input + - description: QEXTAL clock input + + clock-names: + items: + - const: audio_extal + - const: rtxin + - const: qextal + + '#clock-cells': + description: | + - For CPG core clocks, the two clock specifier cells must be "CPG_CORE" + and a core clock reference, as defined in + , + - For module clocks, the two clock specifier cells must be "CPG_MOD" and + a module number. The module number is calculated as the CLKON register + offset index multiplied by 16, plus the actual bit in the register + used to turn the CLK ON. For example, for CGC_GIC_0_GICCLK, the + calculation is (1 * 16 + 3) = 0x13. + const: 2 + + '#power-domain-cells': + const: 0 + + '#reset-cells': + description: + The single reset specifier cell must be the reset number. The reset number + is calculated as the reset register offset index multiplied by 16, plus the + actual bit in the register used to reset the specific IP block. For example, + for SYS_0_PRESETN, the calculation is (3 * 16 + 0) = 0x30. + const: 1 + +required: + - compatible + - reg + - clocks + - clock-names + - '#clock-cells' + - '#power-domain-cells' + - '#reset-cells' + +additionalProperties: false + +examples: + - | + clock-controller@10420000 { + compatible = "renesas,r9a09g057-cpg"; + reg = <0x10420000 0x10000>; + clocks = <&audio_extal_clk>, <&rtxin_clk>, <&qextal_clk>; + clock-names = "audio_extal", "rtxin", "qextal"; + #clock-cells = <2>; + #power-domain-cells = <0>; + #reset-cells = <1>; + }; diff --git a/include/dt-bindings/clock/renesas,r9a09g057-cpg.h b/include/dt-bindings/clock/renesas,r9a09g057-cpg.h new file mode 100644 index 000000000000..541e6d719bd6 --- /dev/null +++ b/include/dt-bindings/clock/renesas,r9a09g057-cpg.h @@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) + * + * Copyright (C) 2024 Renesas Electronics Corp. + */ +#ifndef __DT_BINDINGS_CLOCK_RENESAS_R9A09G057_CPG_H__ +#define __DT_BINDINGS_CLOCK_RENESAS_R9A09G057_CPG_H__ + +#include + +/* Core Clock list */ +#define R9A09G057_SYS_0_PCLK 0 +#define R9A09G057_CA55_0_CORE_CLK0 1 +#define R9A09G057_CA55_0_CORE_CLK1 2 +#define R9A09G057_CA55_0_CORE_CLK2 3 +#define R9A09G057_CA55_0_CORE_CLK3 4 +#define R9A09G057_CA55_0_PERIPHCLK 5 +#define R9A09G057_CM33_CLK0 6 +#define R9A09G057_CST_0_SWCLKTCK 7 +#define R9A09G057_IOTOP_0_SHCLK 8 + +#endif /* __DT_BINDINGS_CLOCK_RENESAS_R9A09G057_CPG_H__ */ From patchwork Mon Jul 15 12:54:37 2024 Content-Type: text/plain; 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Signed-off-by: Lad Prabhakar --- v3->v4 - Dropped masking of parent clks with 0xffff - Dropped storing mod clk id and now calculating it based on index and bit. - Made parent to u16 in struct rzv2h_mod_clk - Made a copy of resets array in struct rzv2h_cpg_priv v2->v3 - Dropped num_hw_resets from struct rzv2h_cpg_priv - Dropped range_check for module clocks - Made mon_index to s8 instead of u8 in struct rzv2h_mod_clk - Added support for critical module clocks with DEF_MOD_CRITICAL - Added check for mon_index in rzv2h_mod_clock_endisable and rzv2h_mod_clock_is_enabled() v1->v2 - Introduced family specific config option - Now using register indexes for CLKON/CLKMON/RST/RSTMON - Introduced PLL_CONF macro - Dropped function pointer to get PLL_CLK1/2 offsets - Added range check for core clks - Dropped NULLified clocks check - Updated commit description --- drivers/clk/renesas/Kconfig | 4 + drivers/clk/renesas/Makefile | 1 + drivers/clk/renesas/rzv2h-cpg.c | 681 ++++++++++++++++++++++++++++++++ drivers/clk/renesas/rzv2h-cpg.h | 151 +++++++ 4 files changed, 837 insertions(+) create mode 100644 drivers/clk/renesas/rzv2h-cpg.c create mode 100644 drivers/clk/renesas/rzv2h-cpg.h diff --git a/drivers/clk/renesas/Kconfig b/drivers/clk/renesas/Kconfig index 4410d16de4e2..f078ccb635bb 100644 --- a/drivers/clk/renesas/Kconfig +++ b/drivers/clk/renesas/Kconfig @@ -228,6 +228,10 @@ config CLK_RZG2L bool "RZ/{G2L,G2UL,G3S,V2L} family clock support" if COMPILE_TEST select RESET_CONTROLLER +config CLK_RZV2H + bool "RZ/V2H(P) family clock support" if COMPILE_TEST + select RESET_CONTROLLER + # Generic config CLK_RENESAS_CPG_MSSR bool "CPG/MSSR clock support" if COMPILE_TEST diff --git a/drivers/clk/renesas/Makefile b/drivers/clk/renesas/Makefile index f7e18679c3b8..d81a62e78345 100644 --- a/drivers/clk/renesas/Makefile +++ b/drivers/clk/renesas/Makefile @@ -46,6 +46,7 @@ obj-$(CONFIG_CLK_RCAR_GEN3_CPG) += rcar-gen3-cpg.o obj-$(CONFIG_CLK_RCAR_GEN4_CPG) += rcar-gen4-cpg.o obj-$(CONFIG_CLK_RCAR_USB2_CLOCK_SEL) += rcar-usb2-clock-sel.o obj-$(CONFIG_CLK_RZG2L) += rzg2l-cpg.o +obj-$(CONFIG_CLK_RZV2H) += rzv2h-cpg.o # Generic obj-$(CONFIG_CLK_RENESAS_CPG_MSSR) += renesas-cpg-mssr.o diff --git a/drivers/clk/renesas/rzv2h-cpg.c b/drivers/clk/renesas/rzv2h-cpg.c new file mode 100644 index 000000000000..fc3ff7a65aac --- /dev/null +++ b/drivers/clk/renesas/rzv2h-cpg.c @@ -0,0 +1,681 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Renesas RZ/V2H(P) Clock Pulse Generator + * + * Copyright (C) 2024 Renesas Electronics Corp. + * + * Based on rzg2l-cpg.c + * + * Copyright (C) 2015 Glider bvba + * Copyright (C) 2013 Ideas On Board SPRL + * Copyright (C) 2015 Renesas Electronics Corp. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "rzv2h-cpg.h" + +#ifdef DEBUG +#define WARN_DEBUG(x) WARN_ON(x) +#else +#define WARN_DEBUG(x) do { } while (0) +#endif + +#define GET_CLK_ON_OFFSET(x) (0x600 + ((x) * 4)) +#define GET_CLK_MON_OFFSET(x) (0x800 + ((x) * 4)) +#define GET_RST_OFFSET(x) (0x900 + ((x) * 4)) +#define GET_RST_MON_OFFSET(x) (0xA00 + ((x) * 4)) + +#define KDIV(val) ((s16)FIELD_GET(GENMASK(31, 16), (val))) +#define MDIV(val) FIELD_GET(GENMASK(15, 6), (val)) +#define PDIV(val) FIELD_GET(GENMASK(5, 0), (val)) +#define SDIV(val) FIELD_GET(GENMASK(2, 0), (val)) + +#define GET_MOD_CLK_ID(base, index, bit) \ + ((base) + ((((index) * (16))) + (bit))) + +/** + * struct rzv2h_cpg_priv - Clock Pulse Generator Private Data + * + * @info: Pointer to platform data + * @dev: CPG device + * @base: CPG register block base address + * @clks: Array containing all Core and Module Clocks + * @num_core_clks: Number of Core Clocks in clks[] + * @num_mod_clks: Number of Module Clocks in clks[] + * @resets: Array of resets + * @num_resets: Number of Module Resets in info->resets[] + * @last_dt_core_clk: ID of the last Core Clock exported to DT + * @rcdev: Reset controller entity + */ +struct rzv2h_cpg_priv { + struct device *dev; + void __iomem *base; + + struct clk **clks; + unsigned int num_core_clks; + unsigned int num_mod_clks; + struct rzv2h_reset *resets; + unsigned int num_resets; + unsigned int last_dt_core_clk; + + struct reset_controller_dev rcdev; +}; + +#define rcdev_to_priv(x) container_of(x, struct rzv2h_cpg_priv, rcdev) + +struct pll_clk { + struct rzv2h_cpg_priv *priv; + void __iomem *base; + struct clk_hw hw; + unsigned int conf; + unsigned int type; +}; + +#define to_pll(_hw) container_of(_hw, struct pll_clk, hw) + +/** + * struct mod_clock - Module clock + * + * @priv: CPG private data + * @hw: handle between common and hardware-specific interfaces + * @on_index: register offset + * @on_bit: ON/MON bit + * @mon_index: monitor register offset + * @mon_bit: montor bit + */ +struct mod_clock { + struct rzv2h_cpg_priv *priv; + struct clk_hw hw; + u8 on_index; + u8 on_bit; + s8 mon_index; + u8 mon_bit; +}; + +#define to_mod_clock(_hw) container_of(_hw, struct mod_clock, hw) + +static unsigned long rzv2h_cpg_pll_clk_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct pll_clk *pll_clk = to_pll(hw); + struct rzv2h_cpg_priv *priv = pll_clk->priv; + unsigned int clk1, clk2; + u64 rate; + + if (!PLL_CLK_ACCESS(pll_clk->conf)) + return 0; + + clk1 = readl(priv->base + PLL_CLK1_OFFSET(pll_clk->conf)); + clk2 = readl(priv->base + PLL_CLK2_OFFSET(pll_clk->conf)); + + rate = mul_u64_u32_shr(parent_rate, (MDIV(clk1) << 16) + KDIV(clk1), + 16 + SDIV(clk2)); + + return DIV_ROUND_CLOSEST_ULL(rate, PDIV(clk1)); +} + +static const struct clk_ops rzv2h_cpg_pll_ops = { + .recalc_rate = rzv2h_cpg_pll_clk_recalc_rate, +}; + +static struct clk * __init +rzv2h_cpg_pll_clk_register(const struct cpg_core_clk *core, + struct rzv2h_cpg_priv *priv, + const struct clk_ops *ops) +{ + void __iomem *base = priv->base; + struct device *dev = priv->dev; + struct clk_init_data init; + const struct clk *parent; + const char *parent_name; + struct pll_clk *pll_clk; + int ret; + + parent = priv->clks[core->parent]; + if (IS_ERR(parent)) + return ERR_CAST(parent); + + pll_clk = devm_kzalloc(dev, sizeof(*pll_clk), GFP_KERNEL); + if (!pll_clk) + return ERR_PTR(-ENOMEM); + + parent_name = __clk_get_name(parent); + init.name = core->name; + init.ops = ops; + init.flags = 0; + init.parent_names = &parent_name; + init.num_parents = 1; + + pll_clk->hw.init = &init; + pll_clk->conf = core->conf; + pll_clk->base = base; + pll_clk->priv = priv; + pll_clk->type = core->type; + + ret = devm_clk_hw_register(dev, &pll_clk->hw); + if (ret) + return ERR_PTR(ret); + + return pll_clk->hw.clk; +} + +static struct clk +*rzv2h_cpg_clk_src_twocell_get(struct of_phandle_args *clkspec, + void *data) +{ + unsigned int clkidx = clkspec->args[1]; + struct rzv2h_cpg_priv *priv = data; + struct device *dev = priv->dev; + const char *type; + struct clk *clk; + + switch (clkspec->args[0]) { + case CPG_CORE: + type = "core"; + if (clkidx > priv->last_dt_core_clk) { + dev_err(dev, "Invalid %s clock index %u\n", type, clkidx); + return ERR_PTR(-EINVAL); + } + clk = priv->clks[clkidx]; + break; + + case CPG_MOD: + type = "module"; + if (clkidx >= priv->num_mod_clks) { + dev_err(dev, "Invalid %s clock index %u\n", type, clkidx); + return ERR_PTR(-EINVAL); + } + clk = priv->clks[priv->num_core_clks + clkidx]; + break; + + default: + dev_err(dev, "Invalid CPG clock type %u\n", clkspec->args[0]); + return ERR_PTR(-EINVAL); + } + + if (IS_ERR(clk)) + dev_err(dev, "Cannot get %s clock %u: %ld", type, clkidx, + PTR_ERR(clk)); + else + dev_dbg(dev, "clock (%u, %u) is %pC at %lu Hz\n", + clkspec->args[0], clkspec->args[1], clk, + clk_get_rate(clk)); + return clk; +} + +static void __init +rzv2h_cpg_register_core_clk(const struct cpg_core_clk *core, + struct rzv2h_cpg_priv *priv) +{ + struct clk *clk = ERR_PTR(-EOPNOTSUPP), *parent; + unsigned int id = core->id, div = core->div; + struct device *dev = priv->dev; + const char *parent_name; + struct clk_hw *clk_hw; + + WARN_DEBUG(id >= priv->num_core_clks); + WARN_DEBUG(PTR_ERR(priv->clks[id]) != -ENOENT); + + switch (core->type) { + case CLK_TYPE_IN: + clk = of_clk_get_by_name(priv->dev->of_node, core->name); + break; + case CLK_TYPE_FF: + WARN_DEBUG(core->parent >= priv->num_core_clks); + parent = priv->clks[core->parent]; + if (IS_ERR(parent)) { + clk = parent; + goto fail; + } + + parent_name = __clk_get_name(parent); + clk_hw = devm_clk_hw_register_fixed_factor(dev, core->name, + parent_name, CLK_SET_RATE_PARENT, + core->mult, div); + if (IS_ERR(clk_hw)) { + clk = ERR_CAST(clk_hw); + break; + } + clk = clk_hw->clk; + break; + case CLK_TYPE_PLL: + clk = rzv2h_cpg_pll_clk_register(core, priv, &rzv2h_cpg_pll_ops); + break; + default: + goto fail; + } + + if (IS_ERR_OR_NULL(clk)) + goto fail; + + dev_dbg(dev, "Core clock %pC at %lu Hz\n", clk, clk_get_rate(clk)); + priv->clks[id] = clk; + return; + +fail: + dev_err(dev, "Failed to register core clock %s: %ld\n", + core->name, PTR_ERR(clk)); +} + +static int rzv2h_mod_clock_endisable(struct clk_hw *hw, bool enable) +{ + struct mod_clock *clock = to_mod_clock(hw); + unsigned int reg = GET_CLK_ON_OFFSET(clock->on_index); + struct rzv2h_cpg_priv *priv = clock->priv; + u32 bitmask = BIT(clock->on_bit); + struct device *dev = priv->dev; + u32 value; + int error; + + dev_dbg(dev, "CLK_ON 0x%x/%pC %s\n", reg, hw->clk, + enable ? "ON" : "OFF"); + + value = bitmask << 16; + if (enable) + value |= bitmask; + + writel(value, priv->base + reg); + + if (!enable || clock->mon_index < 0) + return 0; + + reg = GET_CLK_MON_OFFSET(clock->mon_index); + bitmask = BIT(clock->mon_bit); + error = readl_poll_timeout_atomic(priv->base + reg, value, + value & bitmask, 0, 10); + if (error) + dev_err(dev, "Failed to enable CLK_ON %p\n", + priv->base + reg); + + return error; +} + +static int rzv2h_mod_clock_enable(struct clk_hw *hw) +{ + return rzv2h_mod_clock_endisable(hw, true); +} + +static void rzv2h_mod_clock_disable(struct clk_hw *hw) +{ + rzv2h_mod_clock_endisable(hw, false); +} + +static int rzv2h_mod_clock_is_enabled(struct clk_hw *hw) +{ + struct mod_clock *clock = to_mod_clock(hw); + struct rzv2h_cpg_priv *priv = clock->priv; + u32 bitmask; + u32 offset; + + if (clock->mon_index >= 0) { + offset = GET_CLK_MON_OFFSET(clock->mon_index); + bitmask = BIT(clock->mon_bit); + } else { + offset = GET_CLK_ON_OFFSET(clock->on_index); + bitmask = BIT(clock->on_bit); + } + + return readl(priv->base + offset) & bitmask; +} + +static const struct clk_ops rzv2h_mod_clock_ops = { + .enable = rzv2h_mod_clock_enable, + .disable = rzv2h_mod_clock_disable, + .is_enabled = rzv2h_mod_clock_is_enabled, +}; + +static void __init +rzv2h_cpg_register_mod_clk(const struct rzv2h_mod_clk *mod, + struct rzv2h_cpg_priv *priv) +{ + struct mod_clock *clock = NULL; + struct device *dev = priv->dev; + struct clk_init_data init; + struct clk *parent, *clk; + const char *parent_name; + unsigned int id; + int ret; + + id = GET_MOD_CLK_ID(priv->num_core_clks, mod->on_index, mod->on_bit); + WARN_DEBUG(id >= priv->num_core_clks + priv->num_mod_clks); + WARN_DEBUG(mod->parent >= priv->num_core_clks + priv->num_mod_clks); + WARN_DEBUG(PTR_ERR(priv->clks[id]) != -ENOENT); + + parent = priv->clks[mod->parent]; + if (IS_ERR(parent)) { + clk = parent; + goto fail; + } + + clock = devm_kzalloc(dev, sizeof(*clock), GFP_KERNEL); + if (!clock) { + clk = ERR_PTR(-ENOMEM); + goto fail; + } + + init.name = mod->name; + init.ops = &rzv2h_mod_clock_ops; + init.flags = CLK_SET_RATE_PARENT; + if (mod->critical) + init.flags |= CLK_IS_CRITICAL; + + parent_name = __clk_get_name(parent); + init.parent_names = &parent_name; + init.num_parents = 1; + + clock->on_index = mod->on_index; + clock->on_bit = mod->on_bit; + clock->mon_index = mod->mon_index; + clock->mon_bit = mod->mon_bit; + clock->priv = priv; + clock->hw.init = &init; + + ret = devm_clk_hw_register(dev, &clock->hw); + if (ret) { + clk = ERR_PTR(ret); + goto fail; + } + + priv->clks[id] = clock->hw.clk; + + return; + +fail: + dev_err(dev, "Failed to register module clock %s: %ld\n", + mod->name, PTR_ERR(clk)); +} + +static int rzv2h_cpg_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct rzv2h_cpg_priv *priv = rcdev_to_priv(rcdev); + unsigned int reg = GET_RST_OFFSET(priv->resets[id].reset_index); + u32 mask = BIT(priv->resets[id].reset_bit); + u8 monbit = priv->resets[id].mon_bit; + u32 value = mask << 16; + + dev_dbg(rcdev->dev, "assert id:%ld offset:0x%x\n", id, reg); + + writel(value, priv->base + reg); + + reg = GET_RST_MON_OFFSET(priv->resets[id].mon_index); + mask = BIT(monbit); + + return readl_poll_timeout_atomic(priv->base + reg, value, + value & mask, 10, 200); +} + +static int rzv2h_cpg_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct rzv2h_cpg_priv *priv = rcdev_to_priv(rcdev); + unsigned int reg = GET_RST_OFFSET(priv->resets[id].reset_index); + u32 mask = BIT(priv->resets[id].reset_bit); + u8 monbit = priv->resets[id].mon_bit; + u32 value = (mask << 16) | mask; + + dev_dbg(rcdev->dev, "deassert id:%ld offset:0x%x\n", id, reg); + + writel(value, priv->base + reg); + + reg = GET_RST_MON_OFFSET(priv->resets[id].mon_index); + mask = BIT(monbit); + + return readl_poll_timeout_atomic(priv->base + reg, value, + !(value & mask), 10, 200); +} + +static int rzv2h_cpg_reset(struct reset_controller_dev *rcdev, + unsigned long id) +{ + int ret; + + ret = rzv2h_cpg_assert(rcdev, id); + if (ret) + return ret; + + return rzv2h_cpg_deassert(rcdev, id); +} + +static int rzv2h_cpg_status(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct rzv2h_cpg_priv *priv = rcdev_to_priv(rcdev); + unsigned int reg = GET_RST_MON_OFFSET(priv->resets[id].mon_index); + u8 monbit = priv->resets[id].mon_bit; + + return !!(readl(priv->base + reg) & BIT(monbit)); +} + +static const struct reset_control_ops rzv2h_cpg_reset_ops = { + .reset = rzv2h_cpg_reset, + .assert = rzv2h_cpg_assert, + .deassert = rzv2h_cpg_deassert, + .status = rzv2h_cpg_status, +}; + +static int rzv2h_cpg_reset_xlate(struct reset_controller_dev *rcdev, + const struct of_phandle_args *reset_spec) +{ + unsigned int id = reset_spec->args[0]; + + if (id >= rcdev->nr_resets) { + dev_err(rcdev->dev, "Invalid reset index %u\n", id); + return -EINVAL; + } + + return id; +} + +static int rzv2h_cpg_reset_controller_register(struct rzv2h_cpg_priv *priv) +{ + priv->rcdev.ops = &rzv2h_cpg_reset_ops; + priv->rcdev.of_node = priv->dev->of_node; + priv->rcdev.dev = priv->dev; + priv->rcdev.of_reset_n_cells = 1; + priv->rcdev.of_xlate = rzv2h_cpg_reset_xlate; + priv->rcdev.nr_resets = priv->num_resets; + + return devm_reset_controller_register(priv->dev, &priv->rcdev); +} + +/** + * struct rzv2h_cpg_pd - RZ/V2H power domain data structure + * @priv: pointer to CPG private data structure + * @genpd: generic PM domain + */ +struct rzv2h_cpg_pd { + struct rzv2h_cpg_priv *priv; + struct generic_pm_domain genpd; +}; + +static int rzv2h_cpg_attach_dev(struct generic_pm_domain *domain, struct device *dev) +{ + struct device_node *np = dev->of_node; + struct of_phandle_args clkspec; + bool once = true; + struct clk *clk; + int error; + int i = 0; + + while (!of_parse_phandle_with_args(np, "clocks", "#clock-cells", i, + &clkspec)) { + if (once) { + once = false; + error = pm_clk_create(dev); + if (error) { + of_node_put(clkspec.np); + goto err; + } + } + clk = of_clk_get_from_provider(&clkspec); + of_node_put(clkspec.np); + if (IS_ERR(clk)) { + error = PTR_ERR(clk); + goto fail_destroy; + } + + error = pm_clk_add_clk(dev, clk); + if (error) { + dev_err(dev, "pm_clk_add_clk failed %d\n", + error); + goto fail_put; + } + i++; + } + + return 0; + +fail_put: + clk_put(clk); + +fail_destroy: + pm_clk_destroy(dev); +err: + return error; +} + +static void rzv2h_cpg_detach_dev(struct generic_pm_domain *unused, struct device *dev) +{ + if (!pm_clk_no_clocks(dev)) + pm_clk_destroy(dev); +} + +static void rzv2h_cpg_genpd_remove_simple(void *data) +{ + pm_genpd_remove(data); +} + +static int __init rzv2h_cpg_add_pm_domains(struct rzv2h_cpg_priv *priv) +{ + struct device *dev = priv->dev; + struct device_node *np = dev->of_node; + struct rzv2h_cpg_pd *pd; + int ret; + + pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); + if (!pd) + return -ENOMEM; + + pd->genpd.name = np->name; + pd->priv = priv; + pd->genpd.flags |= GENPD_FLAG_ALWAYS_ON | GENPD_FLAG_PM_CLK | GENPD_FLAG_ACTIVE_WAKEUP; + pd->genpd.attach_dev = rzv2h_cpg_attach_dev; + pd->genpd.detach_dev = rzv2h_cpg_detach_dev; + ret = pm_genpd_init(&pd->genpd, &pm_domain_always_on_gov, false); + if (ret) + return ret; + + ret = devm_add_action_or_reset(dev, rzv2h_cpg_genpd_remove_simple, &pd->genpd); + if (ret) + return ret; + + return of_genpd_add_provider_simple(np, &pd->genpd); +} + +static void rzv2h_cpg_del_clk_provider(void *data) +{ + of_clk_del_provider(data); +} + +static int __init rzv2h_cpg_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + const struct rzv2h_cpg_info *info; + struct rzv2h_cpg_priv *priv; + unsigned int nclks, i; + struct clk **clks; + int error; + + info = of_device_get_match_data(dev); + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev = dev; + + priv->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(priv->base)) + return PTR_ERR(priv->base); + + nclks = info->num_total_core_clks + info->num_hw_mod_clks; + clks = devm_kmalloc_array(dev, nclks, sizeof(*clks), GFP_KERNEL); + if (!clks) + return -ENOMEM; + + priv->resets = devm_kmemdup(dev, info->resets, sizeof(*info->resets) * + info->num_resets, GFP_KERNEL); + if (!priv->resets) + return -ENOMEM; + + dev_set_drvdata(dev, priv); + priv->clks = clks; + priv->num_core_clks = info->num_total_core_clks; + priv->num_mod_clks = info->num_hw_mod_clks; + priv->last_dt_core_clk = info->last_dt_core_clk; + priv->num_resets = info->num_resets; + + for (i = 0; i < nclks; i++) + clks[i] = ERR_PTR(-ENOENT); + + for (i = 0; i < info->num_core_clks; i++) + rzv2h_cpg_register_core_clk(&info->core_clks[i], priv); + + for (i = 0; i < info->num_mod_clks; i++) + rzv2h_cpg_register_mod_clk(&info->mod_clks[i], priv); + + error = of_clk_add_provider(np, rzv2h_cpg_clk_src_twocell_get, priv); + if (error) + return error; + + error = devm_add_action_or_reset(dev, rzv2h_cpg_del_clk_provider, np); + if (error) + return error; + + error = rzv2h_cpg_add_pm_domains(priv); + if (error) + return error; + + error = rzv2h_cpg_reset_controller_register(priv); + if (error) + return error; + + return 0; +} + +static const struct of_device_id rzv2h_cpg_match[] = { + { /* sentinel */ } +}; + +static struct platform_driver rzv2h_cpg_driver = { + .driver = { + .name = "rzv2h-cpg", + .of_match_table = rzv2h_cpg_match, + }, +}; + +static int __init rzv2h_cpg_init(void) +{ + return platform_driver_probe(&rzv2h_cpg_driver, rzv2h_cpg_probe); +} + +subsys_initcall(rzv2h_cpg_init); + +MODULE_DESCRIPTION("Renesas RZ/V2H CPG Driver"); diff --git a/drivers/clk/renesas/rzv2h-cpg.h b/drivers/clk/renesas/rzv2h-cpg.h new file mode 100644 index 000000000000..33631c101541 --- /dev/null +++ b/drivers/clk/renesas/rzv2h-cpg.h @@ -0,0 +1,151 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Renesas RZ/V2H(P) Clock Pulse Generator + * + * Copyright (C) 2024 Renesas Electronics Corp. + */ + +#ifndef __RENESAS_RZV2H_CPG_H__ +#define __RENESAS_RZV2H_CPG_H__ + +/** + * Definitions of CPG Core Clocks + * + * These include: + * - Clock outputs exported to DT + * - External input clocks + * - Internal CPG clocks + */ +struct cpg_core_clk { + const char *name; + unsigned int id; + unsigned int parent; + unsigned int div; + unsigned int mult; + unsigned int type; + unsigned int conf; +}; + +enum clk_types { + /* Generic */ + CLK_TYPE_IN, /* External Clock Input */ + CLK_TYPE_FF, /* Fixed Factor Clock */ + CLK_TYPE_PLL, +}; + +/* BIT(31) indicates if CLK1/2 are accessible or not */ +#define PLL_CONF(n) (BIT(31) | ((n) & ~GENMASK(31, 16))) +#define PLL_CLK_ACCESS(n) ((n) & BIT(31) ? 1 : 0) +#define PLL_CLK1_OFFSET(n) ((n) & ~GENMASK(31, 16)) +#define PLL_CLK2_OFFSET(n) (((n) & ~GENMASK(31, 16)) + (0x4)) + +#define DEF_TYPE(_name, _id, _type...) \ + { .name = _name, .id = _id, .type = _type } +#define DEF_BASE(_name, _id, _type, _parent...) \ + DEF_TYPE(_name, _id, _type, .parent = _parent) +#define DEF_PLL(_name, _id, _parent, _conf) \ + DEF_TYPE(_name, _id, CLK_TYPE_PLL, .parent = _parent, .conf = _conf) +#define DEF_INPUT(_name, _id) \ + DEF_TYPE(_name, _id, CLK_TYPE_IN) +#define DEF_FIXED(_name, _id, _parent, _mult, _div) \ + DEF_BASE(_name, _id, CLK_TYPE_FF, _parent, .div = _div, .mult = _mult) + +/** + * struct rzv2h_mod_clk - Module Clocks definitions + * + * @name: handle between common and hardware-specific interfaces + * @parent: id of parent clock + * @critical: flag to indicate the clock is critical + * @on_index: control register index + * @on_bit: ON bit + * @mon_index: monitor register index + * @mon_bit: monitor bit + */ +struct rzv2h_mod_clk { + const char *name; + u16 parent; + bool critical; + u8 on_index; + u8 on_bit; + s8 mon_index; + u8 mon_bit; +}; + +#define DEF_MOD_BASE(_name, _parent, _critical, _onindex, _onbit, _monindex, _monbit) \ + { \ + .name = (_name), \ + .parent = (_parent), \ + .critical = (_critical), \ + .on_index = (_onindex), \ + .on_bit = (_onbit), \ + .mon_index = (_monindex), \ + .mon_bit = (_monbit), \ + } + +#define DEF_MOD(_name, _parent, _onindex, _onbit, _monindex, _monbit) \ + DEF_MOD_BASE(_name, _parent, false, _onindex, _onbit, _monindex, _monbit) + +#define DEF_MOD_CRITICAL(_name, _parent, _onindex, _onbit, _monindex, _monbit) \ + DEF_MOD_BASE(_name, _parent, true, _onindex, _onbit, _monindex, _monbit) + +/** + * struct rzv2h_reset - Reset definitions + * + * @reset_index: reset register index + * @reset_bit: reset bit + * @mon_index: monitor register index + * @mon_bit: monitor bit + */ +struct rzv2h_reset { + u8 reset_index; + u8 reset_bit; + u8 mon_index; + u8 mon_bit; +}; + +#define RST_ID(x, y) ((((x) * 16)) + (y)) + +#define DEF_RST_BASE(_id, _resindex, _resbit, _monindex, _monbit) \ + [_id] = { \ + .reset_index = (_resindex), \ + .reset_bit = (_resbit), \ + .mon_index = (_monindex), \ + .mon_bit = (_monbit), \ + } + +#define DEF_RST(_resindex, _resbit, _monindex, _monbit) \ + DEF_RST_BASE(RST_ID((_resindex), (_resbit)), _resindex, _resbit, _monindex, _monbit) + +/** + * struct rzv2h_cpg_info - SoC-specific CPG Description + * + * @core_clks: Array of Core Clock definitions + * @num_core_clks: Number of entries in core_clks[] + * @last_dt_core_clk: ID of the last Core Clock exported to DT + * @num_total_core_clks: Total number of Core Clocks (exported + internal) + * + * @mod_clks: Array of Module Clock definitions + * @num_mod_clks: Number of entries in mod_clks[] + * @num_hw_mod_clks: Number of Module Clocks supported by the hardware + * + * @resets: Array of Module Reset definitions + * @num_resets: Number of entries in resets[] + */ +struct rzv2h_cpg_info { + /* Core Clocks */ + const struct cpg_core_clk *core_clks; 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Mon, 15 Jul 2024 05:56:01 -0700 (PDT) Received: from prasmi.home ([2a00:23c8:2500:a01:2595:4364:d152:dff3]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-427a5e81f0dsm86091355e9.12.2024.07.15.05.56.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Jul 2024 05:56:01 -0700 (PDT) From: Prabhakar X-Google-Original-From: Prabhakar To: Geert Uytterhoeven , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Philipp Zabel , Magnus Damm Cc: devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Fabrizio Castro , Lad Prabhakar Subject: [PATCH v4 3/3] clk: renesas: Add RZ/V2H(P) CPG driver Date: Mon, 15 Jul 2024 13:54:38 +0100 Message-Id: <20240715125438.553688-4-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240715125438.553688-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20240715125438.553688-1-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Lad Prabhakar Add RZ/V2H(P) CPG driver. Signed-off-by: Lad Prabhakar Reviewed-by: Geert Uytterhoeven --- v3->v4 - Added a comment for core clocks - Made r9a09g057_mod_clks as __initconst - Made r9a09g057_resets as __initconst - Made r9a09g057_cpg_info as __initconst v2->v3 - Added CLK_PLLDTY - Added core clocks sys_0_pclk and iotop_0_shclk - Dropped r9a09g057_crit_mod_clks v1->v2 - Updated commit description - Dropped pll_clk1/clk2_offset - Made r9a09g057_mod_clks/r9a09g057_resets as static const - Now using register indexes --- drivers/clk/renesas/Kconfig | 5 ++ drivers/clk/renesas/Makefile | 1 + drivers/clk/renesas/r9a09g057-cpg.c | 80 +++++++++++++++++++++++++++++ drivers/clk/renesas/rzv2h-cpg.c | 4 ++ drivers/clk/renesas/rzv2h-cpg.h | 2 + 5 files changed, 92 insertions(+) create mode 100644 drivers/clk/renesas/r9a09g057-cpg.c diff --git a/drivers/clk/renesas/Kconfig b/drivers/clk/renesas/Kconfig index f078ccb635bb..76791a1c50ac 100644 --- a/drivers/clk/renesas/Kconfig +++ b/drivers/clk/renesas/Kconfig @@ -40,6 +40,7 @@ config CLK_RENESAS select CLK_R9A07G054 if ARCH_R9A07G054 select CLK_R9A08G045 if ARCH_R9A08G045 select CLK_R9A09G011 if ARCH_R9A09G011 + select CLK_R9A09G057 if ARCH_R9A09G057 select CLK_SH73A0 if ARCH_SH73A0 if CLK_RENESAS @@ -193,6 +194,10 @@ config CLK_R9A09G011 bool "RZ/V2M clock support" if COMPILE_TEST select CLK_RZG2L +config CLK_R9A09G057 + bool "RZ/V2H(P) clock support" if COMPILE_TEST + select CLK_RZV2H + config CLK_SH73A0 bool "SH-Mobile AG5 clock support" if COMPILE_TEST select CLK_RENESAS_CPG_MSTP diff --git a/drivers/clk/renesas/Makefile b/drivers/clk/renesas/Makefile index d81a62e78345..23d2e26051c8 100644 --- a/drivers/clk/renesas/Makefile +++ b/drivers/clk/renesas/Makefile @@ -37,6 +37,7 @@ obj-$(CONFIG_CLK_R9A07G044) += r9a07g044-cpg.o obj-$(CONFIG_CLK_R9A07G054) += r9a07g044-cpg.o obj-$(CONFIG_CLK_R9A08G045) += r9a08g045-cpg.o obj-$(CONFIG_CLK_R9A09G011) += r9a09g011-cpg.o +obj-$(CONFIG_CLK_R9A09G057) += r9a09g057-cpg.o obj-$(CONFIG_CLK_SH73A0) += clk-sh73a0.o # Family diff --git a/drivers/clk/renesas/r9a09g057-cpg.c b/drivers/clk/renesas/r9a09g057-cpg.c new file mode 100644 index 000000000000..9722b810e027 --- /dev/null +++ b/drivers/clk/renesas/r9a09g057-cpg.c @@ -0,0 +1,80 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Renesas RZ/V2H(P) CPG driver + * + * Copyright (C) 2024 Renesas Electronics Corp. + */ + +#include +#include +#include +#include + +#include + +#include "rzv2h-cpg.h" + +enum clk_ids { + /* Core Clock Outputs exported to DT */ + LAST_DT_CORE_CLK = R9A09G057_IOTOP_0_SHCLK, + + /* External Input Clocks */ + CLK_AUDIO_EXTAL, + CLK_RTXIN, + CLK_QEXTAL, + + /* PLL Clocks */ + CLK_PLLCM33, + CLK_PLLDTY, + CLK_PLLCA55, + + /* Internal Core Clocks */ + CLK_PLLCM33_DIV16, + + /* Module Clocks */ + MOD_CLK_BASE, +}; + +static const struct cpg_core_clk r9a09g057_core_clks[] __initconst = { + /* External Clock Inputs */ + DEF_INPUT("audio_extal", CLK_AUDIO_EXTAL), + DEF_INPUT("rtxin", CLK_RTXIN), + DEF_INPUT("qextal", CLK_QEXTAL), + + /* PLL Clocks */ + DEF_FIXED(".pllcm33", CLK_PLLCM33, CLK_QEXTAL, 200, 3), + DEF_FIXED(".plldty", CLK_PLLDTY, CLK_QEXTAL, 200, 3), + DEF_PLL(".pllca55", CLK_PLLCA55, CLK_QEXTAL, PLL_CONF(0x64)), + + /* Internal Core Clocks */ + DEF_FIXED(".pllcm33_div16", CLK_PLLCM33_DIV16, CLK_PLLCM33, 1, 16), + + /* Core Clocks */ + DEF_FIXED("sys_0_pclk", R9A09G057_SYS_0_PCLK, CLK_QEXTAL, 1, 1), + DEF_FIXED("iotop_0_shclk", R9A09G057_IOTOP_0_SHCLK, CLK_PLLCM33_DIV16, 1, 1), +}; + +static const struct rzv2h_mod_clk r9a09g057_mod_clks[] __initconst = { + DEF_MOD("scif_0_clk_pck", CLK_PLLCM33_DIV16, 8, 15, 4, 15), +}; + +static const struct rzv2h_reset r9a09g057_resets[] __initconst = { + DEF_RST(9, 5, 4, 6), /* SCIF_0_RST_SYSTEM_N */ +}; + +const struct rzv2h_cpg_info r9a09g057_cpg_info __initconst = { + /* Core Clocks */ + .core_clks = r9a09g057_core_clks, + .num_core_clks = ARRAY_SIZE(r9a09g057_core_clks), + .last_dt_core_clk = LAST_DT_CORE_CLK, + .num_total_core_clks = MOD_CLK_BASE, + + /* Module Clocks */ + .mod_clks = r9a09g057_mod_clks, + .num_mod_clks = ARRAY_SIZE(r9a09g057_mod_clks), + .num_hw_mod_clks = 25 * 16, + + /* Resets */ + .resets = r9a09g057_resets, + .num_resets = ARRAY_SIZE(r9a09g057_resets), +}; diff --git a/drivers/clk/renesas/rzv2h-cpg.c b/drivers/clk/renesas/rzv2h-cpg.c index fc3ff7a65aac..286a6ece8f80 100644 --- a/drivers/clk/renesas/rzv2h-cpg.c +++ b/drivers/clk/renesas/rzv2h-cpg.c @@ -661,6 +661,10 @@ static int __init rzv2h_cpg_probe(struct platform_device *pdev) } static const struct of_device_id rzv2h_cpg_match[] = { + { + .compatible = "renesas,r9a09g057-cpg", + .data = &r9a09g057_cpg_info, + }, { /* sentinel */ } }; diff --git a/drivers/clk/renesas/rzv2h-cpg.h b/drivers/clk/renesas/rzv2h-cpg.h index 33631c101541..d3ad98123b29 100644 --- a/drivers/clk/renesas/rzv2h-cpg.h +++ b/drivers/clk/renesas/rzv2h-cpg.h @@ -148,4 +148,6 @@ struct rzv2h_cpg_info { unsigned int num_resets; }; +extern const struct rzv2h_cpg_info r9a09g057_cpg_info; + #endif /* __RENESAS_RZV2H_CPG_H__ */