diff options
Diffstat (limited to 'drivers/clk/renesas/renesas-cpg-mssr.c')
| -rw-r--r-- | drivers/clk/renesas/renesas-cpg-mssr.c | 982 |
1 files changed, 795 insertions, 187 deletions
diff --git a/drivers/clk/renesas/renesas-cpg-mssr.c b/drivers/clk/renesas/renesas-cpg-mssr.c index 1f607c806f9b..7f9b7aa39790 100644 --- a/drivers/clk/renesas/renesas-cpg-mssr.c +++ b/drivers/clk/renesas/renesas-cpg-mssr.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Renesas Clock Pulse Generator / Module Standby and Software Reset * @@ -7,10 +8,6 @@ * * Copyright (C) 2013 Ideas On Board SPRL * Copyright (C) 2015 Renesas Electronics Corp. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. */ #include <linux/clk.h> @@ -19,15 +16,18 @@ #include <linux/delay.h> #include <linux/device.h> #include <linux/init.h> +#include <linux/io.h> +#include <linux/iopoll.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/of_address.h> -#include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/pm_clock.h> #include <linux/pm_domain.h> +#include <linux/psci.h> #include <linux/reset-controller.h> #include <linux/slab.h> +#include <linux/string_choices.h> #include <dt-bindings/clock/renesas-cpg-mssr.h> @@ -40,9 +40,10 @@ #define WARN_DEBUG(x) do { } while (0) #endif +#define RZT2H_RESET_REG_READ_COUNT 7 /* - * Module Standby and Software Reset register offets. + * Module Standby and Software Reset register offsets. * * If the registers exist, these are valid for SH-Mobile, R-Mobile, * R-Car Gen2, R-Car Gen3, and RZ/G1. @@ -58,8 +59,12 @@ static const u16 mstpsr[] = { 0x9A0, 0x9A4, 0x9A8, 0x9AC, }; -#define MSTPSR(i) mstpsr[i] - +static const u16 mstpsr_for_gen4[] = { + 0x2E00, 0x2E04, 0x2E08, 0x2E0C, 0x2E10, 0x2E14, 0x2E18, 0x2E1C, + 0x2E20, 0x2E24, 0x2E28, 0x2E2C, 0x2E30, 0x2E34, 0x2E38, 0x2E3C, + 0x2E40, 0x2E44, 0x2E48, 0x2E4C, 0x2E50, 0x2E54, 0x2E58, 0x2E5C, + 0x2E60, 0x2E64, 0x2E68, 0x2E6C, 0x2E70, 0x2E74, +}; /* * System Module Stop Control Register offsets @@ -70,8 +75,53 @@ static const u16 smstpcr[] = { 0x990, 0x994, 0x998, 0x99C, }; -#define SMSTPCR(i) smstpcr[i] +static const u16 mstpcr_for_gen4[] = { + 0x2D00, 0x2D04, 0x2D08, 0x2D0C, 0x2D10, 0x2D14, 0x2D18, 0x2D1C, + 0x2D20, 0x2D24, 0x2D28, 0x2D2C, 0x2D30, 0x2D34, 0x2D38, 0x2D3C, + 0x2D40, 0x2D44, 0x2D48, 0x2D4C, 0x2D50, 0x2D54, 0x2D58, 0x2D5C, + 0x2D60, 0x2D64, 0x2D68, 0x2D6C, 0x2D70, 0x2D74, +}; +/* + * Module Stop Control Register (RZ/T2H) + * RZ/T2H has 2 registers blocks, + * Bit 12 is used to differentiate them + */ + +#define RZT2H_MSTPCR_BLOCK_SHIFT 12 +#define RZT2H_MSTPCR_OFFSET_MASK GENMASK(11, 0) +#define RZT2H_MSTPCR(block, offset) (((block) << RZT2H_MSTPCR_BLOCK_SHIFT) | \ + ((offset) & RZT2H_MSTPCR_OFFSET_MASK)) + +#define RZT2H_MSTPCR_BLOCK(x) ((x) >> RZT2H_MSTPCR_BLOCK_SHIFT) +#define RZT2H_MSTPCR_OFFSET(x) ((x) & RZT2H_MSTPCR_OFFSET_MASK) + +static const u16 mstpcr_for_rzt2h[] = { + RZT2H_MSTPCR(0, 0x300), /* MSTPCRA */ + RZT2H_MSTPCR(0, 0x304), /* MSTPCRB */ + RZT2H_MSTPCR(0, 0x308), /* MSTPCRC */ + RZT2H_MSTPCR(0, 0x30c), /* MSTPCRD */ + RZT2H_MSTPCR(0, 0x310), /* MSTPCRE */ + 0, + RZT2H_MSTPCR(1, 0x318), /* MSTPCRG */ + 0, + RZT2H_MSTPCR(1, 0x320), /* MSTPCRI */ + RZT2H_MSTPCR(0, 0x324), /* MSTPCRJ */ + RZT2H_MSTPCR(0, 0x328), /* MSTPCRK */ + RZT2H_MSTPCR(0, 0x32c), /* MSTPCRL */ + RZT2H_MSTPCR(0, 0x330), /* MSTPCRM */ + RZT2H_MSTPCR(1, 0x334), /* MSTPCRN */ +}; + +/* + * Standby Control Register offsets (RZ/A) + * Base address is FRQCR register + */ + +static const u16 stbcr[] = { + 0xFFFF/*dummy*/, 0x010, 0x014, 0x410, 0x414, 0x418, 0x41C, 0x420, + 0x424, 0x428, 0x42C, +}; /* * Software Reset Register offsets @@ -82,45 +132,96 @@ static const u16 srcr[] = { 0x920, 0x924, 0x928, 0x92C, }; -#define SRCR(i) srcr[i] - +static const u16 srcr_for_gen4[] = { + 0x2C00, 0x2C04, 0x2C08, 0x2C0C, 0x2C10, 0x2C14, 0x2C18, 0x2C1C, + 0x2C20, 0x2C24, 0x2C28, 0x2C2C, 0x2C30, 0x2C34, 0x2C38, 0x2C3C, + 0x2C40, 0x2C44, 0x2C48, 0x2C4C, 0x2C50, 0x2C54, 0x2C58, 0x2C5C, + 0x2C60, 0x2C64, 0x2C68, 0x2C6C, 0x2C70, 0x2C74, +}; -/* Realtime Module Stop Control Register offsets */ -#define RMSTPCR(i) (smstpcr[i] - 0x20) +static const u16 mrcr_for_rzt2h[] = { + 0x240, /* MRCTLA */ + 0x244, /* Reserved */ + 0x248, /* Reserved */ + 0x24C, /* Reserved */ + 0x250, /* MRCTLE */ + 0x254, /* Reserved */ + 0x258, /* Reserved */ + 0x25C, /* Reserved */ + 0x260, /* MRCTLI */ + 0x264, /* Reserved */ + 0x268, /* Reserved */ + 0x26C, /* Reserved */ + 0x270, /* MRCTLM */ +}; -/* Modem Module Stop Control Register offsets (r8a73a4) */ -#define MMSTPCR(i) (smstpcr[i] + 0x20) +/* + * Software Reset Clearing Register offsets + */ -/* Software Reset Clearing Register offsets */ -#define SRSTCLR(i) (0x940 + (i) * 4) +static const u16 srstclr[] = { + 0x940, 0x944, 0x948, 0x94C, 0x950, 0x954, 0x958, 0x95C, + 0x960, 0x964, 0x968, 0x96C, +}; +static const u16 srstclr_for_gen4[] = { + 0x2C80, 0x2C84, 0x2C88, 0x2C8C, 0x2C90, 0x2C94, 0x2C98, 0x2C9C, + 0x2CA0, 0x2CA4, 0x2CA8, 0x2CAC, 0x2CB0, 0x2CB4, 0x2CB8, 0x2CBC, + 0x2CC0, 0x2CC4, 0x2CC8, 0x2CCC, 0x2CD0, 0x2CD4, 0x2CD8, 0x2CDC, + 0x2CE0, 0x2CE4, 0x2CE8, 0x2CEC, 0x2CF0, 0x2CF4, +}; /** - * Clock Pulse Generator / Module Standby and Software Reset Private Data + * struct cpg_mssr_priv - Clock Pulse Generator / Module Standby + * and Software Reset Private Data * + * @pub: Data passed to clock registration callback * @rcdev: Optional reset controller entity * @dev: CPG/MSSR device - * @base: CPG/MSSR register block base address - * @rmw_lock: protects RMW register accesses - * @clks: Array containing all Core and Module Clocks + * @reg_layout: CPG/MSSR register layout + * @np: Device node in DT for this CPG/MSSR module * @num_core_clks: Number of Core Clocks in clks[] * @num_mod_clks: Number of Module Clocks in clks[] * @last_dt_core_clk: ID of the last Core Clock exported to DT + * @status_regs: Pointer to status registers array + * @control_regs: Pointer to control registers array + * @reset_regs: Pointer to reset registers array + * @reset_clear_regs: Pointer to reset clearing registers array + * @smstpcr_saved: [].mask: Mask of SMSTPCR[] bits under our control + * [].val: Saved values of SMSTPCR[] + * @reserved_ids: Temporary used, reserved id list + * @num_reserved_ids: Temporary used, number of reserved id list + * @clks: Array containing all Core and Module Clocks */ struct cpg_mssr_priv { + struct cpg_mssr_pub pub; #ifdef CONFIG_RESET_CONTROLLER struct reset_controller_dev rcdev; #endif struct device *dev; - void __iomem *base; - spinlock_t rmw_lock; + enum clk_reg_layout reg_layout; + struct device_node *np; - struct clk **clks; unsigned int num_core_clks; unsigned int num_mod_clks; unsigned int last_dt_core_clk; + + const u16 *status_regs; + const u16 *control_regs; + const u16 *reset_regs; + const u16 *reset_clear_regs; + struct { + u32 mask; + u32 val; + } smstpcr_saved[ARRAY_SIZE(mstpsr_for_gen4)]; + + unsigned int *reserved_ids; + unsigned int num_reserved_ids; + + struct clk *clks[]; }; +static struct cpg_mssr_priv *cpg_mssr_priv; /** * struct mstp_clock - MSTP gating clock @@ -136,6 +237,26 @@ struct mstp_clock { #define to_mstp_clock(_hw) container_of(_hw, struct mstp_clock, hw) +static u32 cpg_rzt2h_mstp_read(struct clk_hw *hw, u16 offset) +{ + struct mstp_clock *clock = to_mstp_clock(hw); + struct cpg_mssr_priv *priv = clock->priv; + void __iomem *base = + RZT2H_MSTPCR_BLOCK(offset) ? priv->pub.base1 : priv->pub.base0; + + return readl(base + RZT2H_MSTPCR_OFFSET(offset)); +} + +static void cpg_rzt2h_mstp_write(struct clk_hw *hw, u16 offset, u32 value) +{ + struct mstp_clock *clock = to_mstp_clock(hw); + struct cpg_mssr_priv *priv = clock->priv; + void __iomem *base = + RZT2H_MSTPCR_BLOCK(offset) ? priv->pub.base1 : priv->pub.base0; + + writel(value, base + RZT2H_MSTPCR_OFFSET(offset)); +} + static int cpg_mstp_clock_endisable(struct clk_hw *hw, bool enable) { struct mstp_clock *clock = to_mstp_clock(hw); @@ -145,38 +266,70 @@ static int cpg_mstp_clock_endisable(struct clk_hw *hw, bool enable) struct device *dev = priv->dev; u32 bitmask = BIT(bit); unsigned long flags; - unsigned int i; u32 value; + int error; dev_dbg(dev, "MSTP %u%02u/%pC %s\n", reg, bit, hw->clk, - enable ? "ON" : "OFF"); - spin_lock_irqsave(&priv->rmw_lock, flags); + str_on_off(enable)); + spin_lock_irqsave(&priv->pub.rmw_lock, flags); - value = readl(priv->base + SMSTPCR(reg)); - if (enable) - value &= ~bitmask; - else - value |= bitmask; - writel(value, priv->base + SMSTPCR(reg)); + if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A) { + value = readb(priv->pub.base0 + priv->control_regs[reg]); + if (enable) + value &= ~bitmask; + else + value |= bitmask; + writeb(value, priv->pub.base0 + priv->control_regs[reg]); + + /* dummy read to ensure write has completed */ + readb(priv->pub.base0 + priv->control_regs[reg]); + barrier_data(priv->pub.base0 + priv->control_regs[reg]); + + } else if (priv->reg_layout == CLK_REG_LAYOUT_RZ_T2H) { + value = cpg_rzt2h_mstp_read(hw, + priv->control_regs[reg]); - spin_unlock_irqrestore(&priv->rmw_lock, flags); + if (enable) + value &= ~bitmask; + else + value |= bitmask; + + cpg_rzt2h_mstp_write(hw, + priv->control_regs[reg], + value); + } else { + value = readl(priv->pub.base0 + priv->control_regs[reg]); + if (enable) + value &= ~bitmask; + else + value |= bitmask; + writel(value, priv->pub.base0 + priv->control_regs[reg]); + } - if (!enable) + spin_unlock_irqrestore(&priv->pub.rmw_lock, flags); + + if (!enable || priv->reg_layout == CLK_REG_LAYOUT_RZ_A) return 0; - for (i = 1000; i > 0; --i) { - if (!(readl(priv->base + MSTPSR(reg)) & bitmask)) - break; - cpu_relax(); + if (priv->reg_layout == CLK_REG_LAYOUT_RZ_T2H) { + /* + * For the RZ/T2H case, it is necessary to perform a read-back after + * accessing the MSTPCRm register and to dummy-read any register of + * the IP at least seven times. Instead of memory-mapping the IP + * register, we simply add a delay after the read operation. + */ + cpg_rzt2h_mstp_read(hw, priv->control_regs[reg]); + udelay(10); + return 0; } - if (!i) { + error = readl_poll_timeout_atomic(priv->pub.base0 + priv->status_regs[reg], + value, !(value & bitmask), 0, 10); + if (error) dev_err(dev, "Failed to enable SMSTP %p[%d]\n", - priv->base + SMSTPCR(reg), bit); - return -ETIMEDOUT; - } + priv->pub.base0 + priv->control_regs[reg], bit); - return 0; + return error; } static int cpg_mstp_clock_enable(struct clk_hw *hw) @@ -193,9 +346,16 @@ static int cpg_mstp_clock_is_enabled(struct clk_hw *hw) { struct mstp_clock *clock = to_mstp_clock(hw); struct cpg_mssr_priv *priv = clock->priv; + unsigned int reg = clock->index / 32; u32 value; - value = readl(priv->base + MSTPSR(clock->index / 32)); + if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A) + value = readb(priv->pub.base0 + priv->control_regs[reg]); + else if (priv->reg_layout == CLK_REG_LAYOUT_RZ_T2H) + value = cpg_rzt2h_mstp_read(hw, + priv->control_regs[reg]); + else + value = readl(priv->pub.base0 + priv->status_regs[reg]); return !(value & BIT(clock->index % 32)); } @@ -216,6 +376,7 @@ struct clk *cpg_mssr_clk_src_twocell_get(struct of_phandle_args *clkspec, unsigned int idx; const char *type; struct clk *clk; + int range_check; switch (clkspec->args[0]) { case CPG_CORE: @@ -230,8 +391,14 @@ struct clk *cpg_mssr_clk_src_twocell_get(struct of_phandle_args *clkspec, case CPG_MOD: type = "module"; - idx = MOD_CLK_PACK(clkidx); - if (clkidx % 100 > 31 || idx >= priv->num_mod_clks) { + if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A) { + idx = MOD_CLK_PACK_10(clkidx); + range_check = 7 - (clkidx % 10); + } else { + idx = MOD_CLK_PACK(clkidx); + range_check = 31 - (clkidx % 100); + } + if (range_check < 0 || idx >= priv->num_mod_clks) { dev_err(dev, "Invalid %s clock index %u\n", type, clkidx); return ERR_PTR(-EINVAL); @@ -248,8 +415,9 @@ struct clk *cpg_mssr_clk_src_twocell_get(struct of_phandle_args *clkspec, dev_err(dev, "Cannot get %s clock %u: %ld", type, clkidx, PTR_ERR(clk)); else - dev_dbg(dev, "clock (%u, %u) is %pC at %pCr Hz\n", - clkspec->args[0], clkspec->args[1], clk, clk); + 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; } @@ -265,21 +433,16 @@ static void __init cpg_mssr_register_core_clk(const struct cpg_core_clk *core, WARN_DEBUG(id >= priv->num_core_clks); WARN_DEBUG(PTR_ERR(priv->clks[id]) != -ENOENT); - if (!core->name) { - /* Skip NULLified clock */ - return; - } - switch (core->type) { case CLK_TYPE_IN: - clk = of_clk_get_by_name(priv->dev->of_node, core->name); + clk = of_clk_get_by_name(priv->np, core->name); break; case CLK_TYPE_FF: case CLK_TYPE_DIV6P1: case CLK_TYPE_DIV6_RO: WARN_DEBUG(core->parent >= priv->num_core_clks); - parent = priv->clks[core->parent]; + parent = priv->pub.clks[core->parent]; if (IS_ERR(parent)) { clk = parent; goto fail; @@ -289,11 +452,12 @@ static void __init cpg_mssr_register_core_clk(const struct cpg_core_clk *core, if (core->type == CLK_TYPE_DIV6_RO) /* Multiply with the DIV6 register value */ - div *= (readl(priv->base + core->offset) & 0x3f) + 1; + div *= (readl(priv->pub.base0 + core->offset) & 0x3f) + 1; if (core->type == CLK_TYPE_DIV6P1) { clk = cpg_div6_register(core->name, 1, &parent_name, - priv->base + core->offset); + priv->pub.base0 + core->offset, + &priv->pub.notifiers); } else { clk = clk_register_fixed_factor(NULL, core->name, parent_name, 0, @@ -301,21 +465,26 @@ static void __init cpg_mssr_register_core_clk(const struct cpg_core_clk *core, } break; + case CLK_TYPE_FR: + clk = clk_register_fixed_rate(NULL, core->name, NULL, 0, + core->mult); + break; + default: if (info->cpg_clk_register) clk = info->cpg_clk_register(dev, core, info, - priv->clks, priv->base); + &priv->pub); else dev_err(dev, "%s has unsupported core clock type %u\n", core->name, core->type); break; } - if (IS_ERR_OR_NULL(clk)) + if (IS_ERR(clk)) goto fail; - dev_dbg(dev, "Core clock %pC at %pCr Hz\n", clk, clk); - priv->clks[id] = clk; + dev_dbg(dev, "Core clock %pC at %lu Hz\n", clk, clk_get_rate(clk)); + priv->pub.clks[id] = clk; return; fail: @@ -330,7 +499,7 @@ static void __init cpg_mssr_register_mod_clk(const struct mssr_mod_clk *mod, struct mstp_clock *clock = NULL; struct device *dev = priv->dev; unsigned int id = mod->id; - struct clk_init_data init; + struct clk_init_data init = {}; struct clk *parent, *clk; const char *parent_name; unsigned int i; @@ -338,14 +507,14 @@ static void __init cpg_mssr_register_mod_clk(const struct mssr_mod_clk *mod, WARN_DEBUG(id < priv->num_core_clks); 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); + WARN_DEBUG(PTR_ERR(priv->pub.clks[id]) != -ENOENT); if (!mod->name) { /* Skip NULLified clock */ return; } - parent = priv->clks[mod->parent]; + parent = priv->pub.clks[mod->parent]; if (IS_ERR(parent)) { clk = parent; goto fail; @@ -359,15 +528,7 @@ static void __init cpg_mssr_register_mod_clk(const struct mssr_mod_clk *mod, init.name = mod->name; init.ops = &cpg_mstp_clock_ops; - init.flags = CLK_IS_BASIC | CLK_SET_RATE_PARENT; - for (i = 0; i < info->num_crit_mod_clks; i++) - if (id == info->crit_mod_clks[i]) { - dev_dbg(dev, "MSTP %s setting CLK_IS_CRITICAL\n", - mod->name); - init.flags |= CLK_IS_CRITICAL; - break; - } - + init.flags = CLK_SET_RATE_PARENT; parent_name = __clk_get_name(parent); init.parent_names = &parent_name; init.num_parents = 1; @@ -376,12 +537,35 @@ static void __init cpg_mssr_register_mod_clk(const struct mssr_mod_clk *mod, clock->priv = priv; clock->hw.init = &init; + for (i = 0; i < info->num_crit_mod_clks; i++) + if (id == info->crit_mod_clks[i] && + cpg_mstp_clock_is_enabled(&clock->hw)) { + dev_dbg(dev, "MSTP %s setting CLK_IS_CRITICAL\n", + mod->name); + init.flags |= CLK_IS_CRITICAL; + break; + } + + /* + * Ignore reserved device. + * see + * cpg_mssr_reserved_init() + */ + for (i = 0; i < priv->num_reserved_ids; i++) { + if (id == priv->reserved_ids[i]) { + dev_info(dev, "Ignore Linux non-assigned mod (%s)\n", mod->name); + init.flags |= CLK_IGNORE_UNUSED; + break; + } + } + clk = clk_register(NULL, &clock->hw); if (IS_ERR(clk)) goto fail; - dev_dbg(dev, "Module clock %pC at %pCr Hz\n", clk, clk); + dev_dbg(dev, "Module clock %pC at %lu Hz\n", clk, clk_get_rate(clk)); priv->clks[id] = clk; + priv->smstpcr_saved[clock->index / 32].mask |= BIT(clock->index % 32); return; fail: @@ -392,9 +576,8 @@ fail: struct cpg_mssr_clk_domain { struct generic_pm_domain genpd; - struct device_node *np; unsigned int num_core_pm_clks; - unsigned int core_pm_clks[0]; + unsigned int core_pm_clks[]; }; static struct cpg_mssr_clk_domain *cpg_mssr_clk_domain; @@ -404,7 +587,7 @@ static bool cpg_mssr_is_pm_clk(const struct of_phandle_args *clkspec, { unsigned int i; - if (clkspec->np != pd->np || clkspec->args_count != 2) + if (clkspec->np != pd->genpd.dev.of_node || clkspec->args_count != 2) return false; switch (clkspec->args[0]) { @@ -455,16 +638,12 @@ found: return PTR_ERR(clk); error = pm_clk_create(dev); - if (error) { - dev_err(dev, "pm_clk_create failed %d\n", error); + if (error) goto fail_put; - } error = pm_clk_add_clk(dev, clk); - if (error) { - dev_err(dev, "pm_clk_add_clk %pC failed %d\n", clk, error); + if (error) goto fail_destroy; - } return 0; @@ -481,6 +660,11 @@ void cpg_mssr_detach_dev(struct generic_pm_domain *unused, struct device *dev) pm_clk_destroy(dev); } +static void cpg_mssr_genpd_remove(void *data) +{ + pm_genpd_remove(data); +} + static int __init cpg_mssr_add_clk_domain(struct device *dev, const unsigned int *core_pm_clks, unsigned int num_core_pm_clks) @@ -489,101 +673,165 @@ static int __init cpg_mssr_add_clk_domain(struct device *dev, struct generic_pm_domain *genpd; struct cpg_mssr_clk_domain *pd; size_t pm_size = num_core_pm_clks * sizeof(core_pm_clks[0]); + int ret; pd = devm_kzalloc(dev, sizeof(*pd) + pm_size, GFP_KERNEL); if (!pd) return -ENOMEM; - pd->np = np; pd->num_core_pm_clks = num_core_pm_clks; memcpy(pd->core_pm_clks, core_pm_clks, pm_size); genpd = &pd->genpd; genpd->name = np->name; - genpd->flags = GENPD_FLAG_PM_CLK; + genpd->flags = GENPD_FLAG_PM_CLK | GENPD_FLAG_ALWAYS_ON | + GENPD_FLAG_ACTIVE_WAKEUP; genpd->attach_dev = cpg_mssr_attach_dev; genpd->detach_dev = cpg_mssr_detach_dev; - pm_genpd_init(genpd, &pm_domain_always_on_gov, false); + ret = pm_genpd_init(genpd, &pm_domain_always_on_gov, false); + if (ret) + return ret; + + ret = devm_add_action_or_reset(dev, cpg_mssr_genpd_remove, genpd); + if (ret) + return ret; + cpg_mssr_clk_domain = pd; - of_genpd_add_provider_simple(np, genpd); - return 0; + return of_genpd_add_provider_simple(np, genpd); } #ifdef CONFIG_RESET_CONTROLLER #define rcdev_to_priv(x) container_of(x, struct cpg_mssr_priv, rcdev) -static int cpg_mssr_reset(struct reset_controller_dev *rcdev, - unsigned long id) +static int cpg_mssr_reset_operate(struct reset_controller_dev *rcdev, + const char *func, bool set, unsigned long id) { struct cpg_mssr_priv *priv = rcdev_to_priv(rcdev); unsigned int reg = id / 32; unsigned int bit = id % 32; + const u16 off = set ? priv->reset_regs[reg] : priv->reset_clear_regs[reg]; u32 bitmask = BIT(bit); - unsigned long flags; - u32 value; - dev_dbg(priv->dev, "reset %u%02u\n", reg, bit); + if (func) + dev_dbg(priv->dev, "%s %u%02u\n", func, reg, bit); - /* Reset module */ - spin_lock_irqsave(&priv->rmw_lock, flags); - value = readl(priv->base + SRCR(reg)); - value |= bitmask; - writel(value, priv->base + SRCR(reg)); - spin_unlock_irqrestore(&priv->rmw_lock, flags); - - /* Wait for at least one cycle of the RCLK clock (@ ca. 32 kHz) */ - udelay(35); - - /* Release module from reset state */ - writel(bitmask, priv->base + SRSTCLR(reg)); + writel(bitmask, priv->pub.base0 + off); + readl(priv->pub.base0 + off); + barrier_data(priv->pub.base0 + off); return 0; } -static int cpg_mssr_assert(struct reset_controller_dev *rcdev, unsigned long id) +static int cpg_mssr_reset(struct reset_controller_dev *rcdev, + unsigned long id) { struct cpg_mssr_priv *priv = rcdev_to_priv(rcdev); - unsigned int reg = id / 32; - unsigned int bit = id % 32; - u32 bitmask = BIT(bit); - unsigned long flags; - u32 value; - dev_dbg(priv->dev, "assert %u%02u\n", reg, bit); + /* Reset module */ + cpg_mssr_reset_operate(rcdev, "reset", true, id); + + /* + * On R-Car Gen4, delay after SRCR has been written is 1ms. + * On older SoCs, delay after SRCR has been written is 35us + * (one cycle of the RCLK clock @ ca. 32 kHz). + */ + if (priv->reg_layout == CLK_REG_LAYOUT_RCAR_GEN4) + usleep_range(1000, 2000); + else + usleep_range(35, 1000); + + /* Release module from reset state */ + return cpg_mssr_reset_operate(rcdev, NULL, false, id); +} - spin_lock_irqsave(&priv->rmw_lock, flags); - value = readl(priv->base + SRCR(reg)); - value |= bitmask; - writel(value, priv->base + SRCR(reg)); - spin_unlock_irqrestore(&priv->rmw_lock, flags); - return 0; +static int cpg_mssr_assert(struct reset_controller_dev *rcdev, unsigned long id) +{ + return cpg_mssr_reset_operate(rcdev, "assert", true, id); } static int cpg_mssr_deassert(struct reset_controller_dev *rcdev, unsigned long id) { + return cpg_mssr_reset_operate(rcdev, "deassert", false, id); +} + +static int cpg_mssr_status(struct reset_controller_dev *rcdev, + unsigned long id) +{ struct cpg_mssr_priv *priv = rcdev_to_priv(rcdev); unsigned int reg = id / 32; unsigned int bit = id % 32; u32 bitmask = BIT(bit); - dev_dbg(priv->dev, "deassert %u%02u\n", reg, bit); - - writel(bitmask, priv->base + SRSTCLR(reg)); - return 0; + return !!(readl(priv->pub.base0 + priv->reset_regs[reg]) & bitmask); } -static int cpg_mssr_status(struct reset_controller_dev *rcdev, - unsigned long id) +static int cpg_mrcr_set_reset_state(struct reset_controller_dev *rcdev, + unsigned long id, bool set) { struct cpg_mssr_priv *priv = rcdev_to_priv(rcdev); unsigned int reg = id / 32; unsigned int bit = id % 32; u32 bitmask = BIT(bit); + void __iomem *reg_addr; + unsigned long flags; + unsigned int i; + u32 val; + + dev_dbg(priv->dev, "%s %u%02u\n", set ? "assert" : "deassert", reg, bit); - return !!(readl(priv->base + SRCR(reg)) & bitmask); + spin_lock_irqsave(&priv->pub.rmw_lock, flags); + + reg_addr = priv->pub.base0 + priv->reset_regs[reg]; + /* Read current value and modify */ + val = readl(reg_addr); + if (set) + val |= bitmask; + else + val &= ~bitmask; + writel(val, reg_addr); + + /* + * For secure processing after release from a module reset, one must + * perform multiple dummy reads of the same register. + */ + for (i = 0; !set && i < RZT2H_RESET_REG_READ_COUNT; i++) + readl(reg_addr); + + /* Verify the operation */ + val = readl(reg_addr); + if (set == !(bitmask & val)) { + dev_err(priv->dev, "Reset register %u%02u operation failed\n", reg, bit); + spin_unlock_irqrestore(&priv->pub.rmw_lock, flags); + return -EIO; + } + + spin_unlock_irqrestore(&priv->pub.rmw_lock, flags); + + return 0; +} + +static int cpg_mrcr_reset(struct reset_controller_dev *rcdev, unsigned long id) +{ + int ret; + + ret = cpg_mrcr_set_reset_state(rcdev, id, true); + if (ret) + return ret; + + return cpg_mrcr_set_reset_state(rcdev, id, false); +} + +static int cpg_mrcr_assert(struct reset_controller_dev *rcdev, unsigned long id) +{ + return cpg_mrcr_set_reset_state(rcdev, id, true); +} + +static int cpg_mrcr_deassert(struct reset_controller_dev *rcdev, unsigned long id) +{ + return cpg_mrcr_set_reset_state(rcdev, id, false); } static const struct reset_control_ops cpg_mssr_reset_ops = { @@ -593,6 +841,13 @@ static const struct reset_control_ops cpg_mssr_reset_ops = { .status = cpg_mssr_status, }; +static const struct reset_control_ops cpg_mrcr_reset_ops = { + .reset = cpg_mrcr_reset, + .assert = cpg_mrcr_assert, + .deassert = cpg_mrcr_deassert, + .status = cpg_mssr_status, +}; + static int cpg_mssr_reset_xlate(struct reset_controller_dev *rcdev, const struct of_phandle_args *reset_spec) { @@ -610,11 +865,23 @@ static int cpg_mssr_reset_xlate(struct reset_controller_dev *rcdev, static int cpg_mssr_reset_controller_register(struct cpg_mssr_priv *priv) { - priv->rcdev.ops = &cpg_mssr_reset_ops; + /* + * RZ/T2H (and family) has the Module Reset Control Registers + * which allows control resets of certain modules. + * The number of resets is not equal to the number of module clocks. + */ + if (priv->reg_layout == CLK_REG_LAYOUT_RZ_T2H) { + priv->rcdev.ops = &cpg_mrcr_reset_ops; + priv->rcdev.nr_resets = ARRAY_SIZE(mrcr_for_rzt2h) * 32; + } else { + priv->rcdev.ops = &cpg_mssr_reset_ops; + priv->rcdev.nr_resets = priv->num_mod_clks; + } + priv->rcdev.of_node = priv->dev->of_node; priv->rcdev.of_reset_n_cells = 1; priv->rcdev.of_xlate = cpg_mssr_reset_xlate; - priv->rcdev.nr_resets = priv->num_mod_clks; + return devm_reset_controller_register(priv->dev, &priv->rcdev); } @@ -625,13 +892,29 @@ static inline int cpg_mssr_reset_controller_register(struct cpg_mssr_priv *priv) } #endif /* !CONFIG_RESET_CONTROLLER */ - static const struct of_device_id cpg_mssr_match[] = { +#ifdef CONFIG_CLK_R7S9210 + { + .compatible = "renesas,r7s9210-cpg-mssr", + .data = &r7s9210_cpg_mssr_info, + }, +#endif +#ifdef CONFIG_CLK_R8A7742 + { + .compatible = "renesas,r8a7742-cpg-mssr", + .data = &r8a7742_cpg_mssr_info, + }, +#endif #ifdef CONFIG_CLK_R8A7743 { .compatible = "renesas,r8a7743-cpg-mssr", .data = &r8a7743_cpg_mssr_info, }, + /* RZ/G1N is (almost) identical to RZ/G1M w.r.t. clocks. */ + { + .compatible = "renesas,r8a7744-cpg-mssr", + .data = &r8a7743_cpg_mssr_info, + }, #endif #ifdef CONFIG_CLK_R8A7745 { @@ -639,6 +922,36 @@ static const struct of_device_id cpg_mssr_match[] = { .data = &r8a7745_cpg_mssr_info, }, #endif +#ifdef CONFIG_CLK_R8A77470 + { + .compatible = "renesas,r8a77470-cpg-mssr", + .data = &r8a77470_cpg_mssr_info, + }, +#endif +#ifdef CONFIG_CLK_R8A774A1 + { + .compatible = "renesas,r8a774a1-cpg-mssr", + .data = &r8a774a1_cpg_mssr_info, + }, +#endif +#ifdef CONFIG_CLK_R8A774B1 + { + .compatible = "renesas,r8a774b1-cpg-mssr", + .data = &r8a774b1_cpg_mssr_info, + }, +#endif +#ifdef CONFIG_CLK_R8A774C0 + { + .compatible = "renesas,r8a774c0-cpg-mssr", + .data = &r8a774c0_cpg_mssr_info, + }, +#endif +#ifdef CONFIG_CLK_R8A774E1 + { + .compatible = "renesas,r8a774e1-cpg-mssr", + .data = &r8a774e1_cpg_mssr_info, + }, +#endif #ifdef CONFIG_CLK_R8A7790 { .compatible = "renesas,r8a7790-cpg-mssr", @@ -674,12 +987,84 @@ static const struct of_device_id cpg_mssr_match[] = { .data = &r8a7795_cpg_mssr_info, }, #endif -#ifdef CONFIG_CLK_R8A7796 +#ifdef CONFIG_CLK_R8A77960 { .compatible = "renesas,r8a7796-cpg-mssr", .data = &r8a7796_cpg_mssr_info, }, #endif +#ifdef CONFIG_CLK_R8A77961 + { + .compatible = "renesas,r8a77961-cpg-mssr", + .data = &r8a7796_cpg_mssr_info, + }, +#endif +#ifdef CONFIG_CLK_R8A77965 + { + .compatible = "renesas,r8a77965-cpg-mssr", + .data = &r8a77965_cpg_mssr_info, + }, +#endif +#ifdef CONFIG_CLK_R8A77970 + { + .compatible = "renesas,r8a77970-cpg-mssr", + .data = &r8a77970_cpg_mssr_info, + }, +#endif +#ifdef CONFIG_CLK_R8A77980 + { + .compatible = "renesas,r8a77980-cpg-mssr", + .data = &r8a77980_cpg_mssr_info, + }, +#endif +#ifdef CONFIG_CLK_R8A77990 + { + .compatible = "renesas,r8a77990-cpg-mssr", + .data = &r8a77990_cpg_mssr_info, + }, +#endif +#ifdef CONFIG_CLK_R8A77995 + { + .compatible = "renesas,r8a77995-cpg-mssr", + .data = &r8a77995_cpg_mssr_info, + }, +#endif +#ifdef CONFIG_CLK_R8A779A0 + { + .compatible = "renesas,r8a779a0-cpg-mssr", + .data = &r8a779a0_cpg_mssr_info, + }, +#endif +#ifdef CONFIG_CLK_R8A779F0 + { + .compatible = "renesas,r8a779f0-cpg-mssr", + .data = &r8a779f0_cpg_mssr_info, + }, +#endif +#ifdef CONFIG_CLK_R8A779G0 + { + .compatible = "renesas,r8a779g0-cpg-mssr", + .data = &r8a779g0_cpg_mssr_info, + }, +#endif +#ifdef CONFIG_CLK_R8A779H0 + { + .compatible = "renesas,r8a779h0-cpg-mssr", + .data = &r8a779h0_cpg_mssr_info, + }, +#endif +#ifdef CONFIG_CLK_R9A09G077 + { + .compatible = "renesas,r9a09g077-cpg-mssr", + .data = &r9a09g077_cpg_mssr_info, + }, +#endif +#ifdef CONFIG_CLK_R9A09G087 + { + .compatible = "renesas,r9a09g087-cpg-mssr", + .data = &r9a09g077_cpg_mssr_info, + }, +#endif { /* sentinel */ } }; @@ -688,48 +1073,297 @@ static void cpg_mssr_del_clk_provider(void *data) of_clk_del_provider(data); } -static int __init cpg_mssr_probe(struct platform_device *pdev) +#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_ARM_PSCI_FW) +static int cpg_mssr_suspend_noirq(struct device *dev) +{ + struct cpg_mssr_priv *priv = dev_get_drvdata(dev); + unsigned int reg; + + /* This is the best we can do to check for the presence of PSCI */ + if (!psci_ops.cpu_suspend) + return 0; + + /* Save module registers with bits under our control */ + for (reg = 0; reg < ARRAY_SIZE(priv->smstpcr_saved); reg++) { + if (priv->smstpcr_saved[reg].mask) + priv->smstpcr_saved[reg].val = + priv->reg_layout == CLK_REG_LAYOUT_RZ_A ? + readb(priv->pub.base0 + priv->control_regs[reg]) : + readl(priv->pub.base0 + priv->control_regs[reg]); + } + + /* Save core clocks */ + raw_notifier_call_chain(&priv->pub.notifiers, PM_EVENT_SUSPEND, NULL); + + return 0; +} + +static int cpg_mssr_resume_noirq(struct device *dev) +{ + struct cpg_mssr_priv *priv = dev_get_drvdata(dev); + unsigned int reg; + u32 mask, oldval, newval; + int error; + + /* This is the best we can do to check for the presence of PSCI */ + if (!psci_ops.cpu_suspend) + return 0; + + /* Restore core clocks */ + raw_notifier_call_chain(&priv->pub.notifiers, PM_EVENT_RESUME, NULL); + + /* Restore module clocks */ + for (reg = 0; reg < ARRAY_SIZE(priv->smstpcr_saved); reg++) { + mask = priv->smstpcr_saved[reg].mask; + if (!mask) + continue; + + if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A) + oldval = readb(priv->pub.base0 + priv->control_regs[reg]); + else + oldval = readl(priv->pub.base0 + priv->control_regs[reg]); + newval = oldval & ~mask; + newval |= priv->smstpcr_saved[reg].val & mask; + if (newval == oldval) + continue; + + if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A) { + writeb(newval, priv->pub.base0 + priv->control_regs[reg]); + /* dummy read to ensure write has completed */ + readb(priv->pub.base0 + priv->control_regs[reg]); + barrier_data(priv->pub.base0 + priv->control_regs[reg]); + continue; + } else + writel(newval, priv->pub.base0 + priv->control_regs[reg]); + + /* Wait until enabled clocks are really enabled */ + mask &= ~priv->smstpcr_saved[reg].val; + if (!mask) + continue; + + error = readl_poll_timeout_atomic(priv->pub.base0 + priv->status_regs[reg], + oldval, !(oldval & mask), 0, 10); + if (error) + dev_warn(dev, "Failed to enable SMSTP%u[0x%x]\n", reg, + oldval & mask); + } + + return 0; +} + +static const struct dev_pm_ops cpg_mssr_pm = { + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(cpg_mssr_suspend_noirq, + cpg_mssr_resume_noirq) +}; +#define DEV_PM_OPS &cpg_mssr_pm +#else +#define DEV_PM_OPS NULL +#endif /* CONFIG_PM_SLEEP && CONFIG_ARM_PSCI_FW */ + +static void __init cpg_mssr_reserved_exit(struct cpg_mssr_priv *priv) +{ + kfree(priv->reserved_ids); +} + +static int __init cpg_mssr_reserved_init(struct cpg_mssr_priv *priv, + const struct cpg_mssr_info *info) +{ + struct device_node *soc __free(device_node) = of_find_node_by_path("/soc"); + struct device_node *node; + uint32_t args[MAX_PHANDLE_ARGS]; + unsigned int *ids = NULL; + unsigned int num = 0; + + /* + * Because clk_disable_unused() will disable all unused clocks, the device which is assigned + * to a non-Linux system will be disabled when Linux is booted. + * + * To avoid such situation, renesas-cpg-mssr assumes the device which has + * status = "reserved" is assigned to a non-Linux system, and adds CLK_IGNORE_UNUSED flag + * to its CPG_MOD clocks. + * see also + * cpg_mssr_register_mod_clk() + * + * scif5: serial@e6f30000 { + * ... + * => clocks = <&cpg CPG_MOD 202>, + * <&cpg CPG_CORE R8A7795_CLK_S3D1>, + * <&scif_clk>; + * ... + * status = "reserved"; + * }; + */ + for_each_reserved_child_of_node(soc, node) { + struct of_phandle_iterator it; + int rc; + + of_for_each_phandle(&it, rc, node, "clocks", "#clock-cells", -1) { + int idx; + unsigned int *new_ids; + + if (it.node != priv->np) + continue; + + if (of_phandle_iterator_args(&it, args, MAX_PHANDLE_ARGS) != 2) + continue; + + if (args[0] != CPG_MOD) + continue; + + new_ids = krealloc_array(ids, (num + 1), sizeof(*ids), GFP_KERNEL); + if (!new_ids) { + of_node_put(it.node); + kfree(ids); + return -ENOMEM; + } + ids = new_ids; + + if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A) + idx = MOD_CLK_PACK_10(args[1]); /* for DEF_MOD_STB() */ + else + idx = MOD_CLK_PACK(args[1]); /* for DEF_MOD() */ + + ids[num] = info->num_total_core_clks + idx; + + num++; + } + } + + priv->num_reserved_ids = num; + priv->reserved_ids = ids; + + return 0; +} + +static int __init cpg_mssr_common_init(struct device *dev, + struct device_node *np, + const struct cpg_mssr_info *info) { - struct device *dev = &pdev->dev; - struct device_node *np = dev->of_node; - const struct cpg_mssr_info *info; struct cpg_mssr_priv *priv; unsigned int nclks, i; - struct resource *res; - struct clk **clks; int error; - info = of_device_get_match_data(dev); if (info->init) { error = info->init(dev); if (error) return error; } - priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + nclks = info->num_total_core_clks + info->num_hw_mod_clks; + priv = kzalloc(struct_size(priv, clks, nclks), GFP_KERNEL); if (!priv) return -ENOMEM; + priv->pub.clks = priv->clks; + priv->np = np; priv->dev = dev; - spin_lock_init(&priv->rmw_lock); - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - priv->base = devm_ioremap_resource(dev, res); - if (IS_ERR(priv->base)) - return PTR_ERR(priv->base); + spin_lock_init(&priv->pub.rmw_lock); - 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->pub.base0 = of_iomap(np, 0); + if (!priv->pub.base0) { + error = -ENOMEM; + goto out_err; + } + if (info->reg_layout == CLK_REG_LAYOUT_RZ_T2H) { + priv->pub.base1 = of_iomap(np, 1); + if (!priv->pub.base1) { + error = -ENOMEM; + goto out_err; + } + } - 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; + RAW_INIT_NOTIFIER_HEAD(&priv->pub.notifiers); + priv->reg_layout = info->reg_layout; + if (priv->reg_layout == CLK_REG_LAYOUT_RCAR_GEN2_AND_GEN3) { + priv->status_regs = mstpsr; + priv->control_regs = smstpcr; + priv->reset_regs = srcr; + priv->reset_clear_regs = srstclr; + } else if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A) { + priv->control_regs = stbcr; + } else if (priv->reg_layout == CLK_REG_LAYOUT_RZ_T2H) { + priv->control_regs = mstpcr_for_rzt2h; + priv->reset_regs = mrcr_for_rzt2h; + } else if (priv->reg_layout == CLK_REG_LAYOUT_RCAR_GEN4) { + priv->status_regs = mstpsr_for_gen4; + priv->control_regs = mstpcr_for_gen4; + priv->reset_regs = srcr_for_gen4; + priv->reset_clear_regs = srstclr_for_gen4; + } else { + error = -EINVAL; + goto out_err; + } for (i = 0; i < nclks; i++) - clks[i] = ERR_PTR(-ENOENT); + priv->pub.clks[i] = ERR_PTR(-ENOENT); + + error = cpg_mssr_reserved_init(priv, info); + if (error) + goto out_err; + + error = of_clk_add_provider(np, cpg_mssr_clk_src_twocell_get, priv); + if (error) + goto reserve_err; + + cpg_mssr_priv = priv; + + return 0; + +reserve_err: + cpg_mssr_reserved_exit(priv); +out_err: + if (priv->pub.base0) + iounmap(priv->pub.base0); + if (priv->pub.base1) + iounmap(priv->pub.base1); + kfree(priv); + + return error; +} + +void __init cpg_mssr_early_init(struct device_node *np, + const struct cpg_mssr_info *info) +{ + int error; + int i; + + error = cpg_mssr_common_init(NULL, np, info); + if (error) + return; + + for (i = 0; i < info->num_early_core_clks; i++) + cpg_mssr_register_core_clk(&info->early_core_clks[i], info, + cpg_mssr_priv); + + for (i = 0; i < info->num_early_mod_clks; i++) + cpg_mssr_register_mod_clk(&info->early_mod_clks[i], info, + cpg_mssr_priv); + +} + +static int __init cpg_mssr_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + const struct cpg_mssr_info *info; + struct cpg_mssr_priv *priv; + unsigned int i; + int error; + + info = of_device_get_match_data(dev); + + if (!cpg_mssr_priv) { + error = cpg_mssr_common_init(dev, dev->of_node, info); + if (error) + return error; + } + + priv = cpg_mssr_priv; + priv->dev = dev; + dev_set_drvdata(dev, priv); for (i = 0; i < info->num_core_clks; i++) cpg_mssr_register_core_clk(&info->core_clks[i], info, priv); @@ -737,32 +1371,34 @@ static int __init cpg_mssr_probe(struct platform_device *pdev) for (i = 0; i < info->num_mod_clks; i++) cpg_mssr_register_mod_clk(&info->mod_clks[i], info, priv); - error = of_clk_add_provider(np, cpg_mssr_clk_src_twocell_get, priv); - if (error) - return error; - error = devm_add_action_or_reset(dev, cpg_mssr_del_clk_provider, np); if (error) - return error; + goto reserve_exit; error = cpg_mssr_add_clk_domain(dev, info->core_pm_clks, info->num_core_pm_clks); if (error) - return error; + goto reserve_exit; + + /* Reset Controller not supported for Standby Control SoCs */ + if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A) + goto reserve_exit; error = cpg_mssr_reset_controller_register(priv); - if (error) - return error; - return 0; +reserve_exit: + cpg_mssr_reserved_exit(priv); + + return error; } static struct platform_driver cpg_mssr_driver = { .driver = { .name = "renesas-cpg-mssr", .of_match_table = cpg_mssr_match, + .pm = DEV_PM_OPS, }, }; @@ -773,19 +1409,6 @@ static int __init cpg_mssr_init(void) subsys_initcall(cpg_mssr_init); -void __init cpg_core_nullify_range(struct cpg_core_clk *core_clks, - unsigned int num_core_clks, - unsigned int first_clk, - unsigned int last_clk) -{ - unsigned int i; - - for (i = 0; i < num_core_clks; i++) - if (core_clks[i].id >= first_clk && - core_clks[i].id <= last_clk) - core_clks[i].name = NULL; -} - void __init mssr_mod_nullify(struct mssr_mod_clk *mod_clks, unsigned int num_mod_clks, const unsigned int *clks, unsigned int n) @@ -799,19 +1422,4 @@ void __init mssr_mod_nullify(struct mssr_mod_clk *mod_clks, } } -void __init mssr_mod_reparent(struct mssr_mod_clk *mod_clks, - unsigned int num_mod_clks, - const struct mssr_mod_reparent *clks, - unsigned int n) -{ - unsigned int i, j; - - for (i = 0, j = 0; i < num_mod_clks && j < n; i++) - if (mod_clks[i].id == clks[j].clk) { - mod_clks[i].parent = clks[j].parent; - j++; - } -} - MODULE_DESCRIPTION("Renesas CPG/MSSR Driver"); -MODULE_LICENSE("GPL v2"); |