diff options
Diffstat (limited to 'kernel/arch/arm/mach-omap2/clock.c')
| -rw-r--r-- | kernel/arch/arm/mach-omap2/clock.c | 849 |
1 files changed, 849 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-omap2/clock.c b/kernel/arch/arm/mach-omap2/clock.c new file mode 100644 index 000000000..a699d7169 --- /dev/null +++ b/kernel/arch/arm/mach-omap2/clock.c @@ -0,0 +1,849 @@ +/* + * linux/arch/arm/mach-omap2/clock.c + * + * Copyright (C) 2005-2008 Texas Instruments, Inc. + * Copyright (C) 2004-2010 Nokia Corporation + * + * Contacts: + * Richard Woodruff <r-woodruff2@ti.com> + * Paul Walmsley + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#undef DEBUG + +#include <linux/kernel.h> +#include <linux/export.h> +#include <linux/list.h> +#include <linux/errno.h> +#include <linux/err.h> +#include <linux/delay.h> +#include <linux/clk-provider.h> +#include <linux/io.h> +#include <linux/bitops.h> +#include <linux/regmap.h> +#include <linux/of_address.h> +#include <linux/bootmem.h> +#include <asm/cpu.h> + +#include <trace/events/power.h> + +#include "soc.h" +#include "clockdomain.h" +#include "clock.h" +#include "cm.h" +#include "cm2xxx.h" +#include "cm3xxx.h" +#include "cm-regbits-24xx.h" +#include "cm-regbits-34xx.h" +#include "common.h" + +/* + * MAX_MODULE_ENABLE_WAIT: maximum of number of microseconds to wait + * for a module to indicate that it is no longer in idle + */ +#define MAX_MODULE_ENABLE_WAIT 100000 + +u16 cpu_mask; + +/* + * Clock features setup. Used instead of CPU type checks. + */ +struct ti_clk_features ti_clk_features; + +/* DPLL valid Fint frequency band limits - from 34xx TRM Section 4.7.6.2 */ +#define OMAP3430_DPLL_FINT_BAND1_MIN 750000 +#define OMAP3430_DPLL_FINT_BAND1_MAX 2100000 +#define OMAP3430_DPLL_FINT_BAND2_MIN 7500000 +#define OMAP3430_DPLL_FINT_BAND2_MAX 21000000 + +/* + * DPLL valid Fint frequency range for OMAP36xx and OMAP4xxx. + * From device data manual section 4.3 "DPLL and DLL Specifications". + */ +#define OMAP3PLUS_DPLL_FINT_MIN 32000 +#define OMAP3PLUS_DPLL_FINT_MAX 52000000 + +/* + * clkdm_control: if true, then when a clock is enabled in the + * hardware, its clockdomain will first be enabled; and when a clock + * is disabled in the hardware, its clockdomain will be disabled + * afterwards. + */ +static bool clkdm_control = true; + +static LIST_HEAD(clk_hw_omap_clocks); + +struct clk_iomap { + struct regmap *regmap; + void __iomem *mem; +}; + +static struct clk_iomap *clk_memmaps[CLK_MAX_MEMMAPS]; + +static void clk_memmap_writel(u32 val, void __iomem *reg) +{ + struct clk_omap_reg *r = (struct clk_omap_reg *)® + struct clk_iomap *io = clk_memmaps[r->index]; + + if (io->regmap) + regmap_write(io->regmap, r->offset, val); + else + writel_relaxed(val, io->mem + r->offset); +} + +static u32 clk_memmap_readl(void __iomem *reg) +{ + u32 val; + struct clk_omap_reg *r = (struct clk_omap_reg *)® + struct clk_iomap *io = clk_memmaps[r->index]; + + if (io->regmap) + regmap_read(io->regmap, r->offset, &val); + else + val = readl_relaxed(io->mem + r->offset); + + return val; +} + +void omap2_clk_writel(u32 val, struct clk_hw_omap *clk, void __iomem *reg) +{ + if (WARN_ON_ONCE(!(clk->flags & MEMMAP_ADDRESSING))) + writel_relaxed(val, reg); + else + clk_memmap_writel(val, reg); +} + +u32 omap2_clk_readl(struct clk_hw_omap *clk, void __iomem *reg) +{ + if (WARN_ON_ONCE(!(clk->flags & MEMMAP_ADDRESSING))) + return readl_relaxed(reg); + else + return clk_memmap_readl(reg); +} + +static struct ti_clk_ll_ops omap_clk_ll_ops = { + .clk_readl = clk_memmap_readl, + .clk_writel = clk_memmap_writel, +}; + +/** + * omap2_clk_provider_init - initialize a clock provider + * @match_table: DT device table to match for devices to init + * @np: device node pointer for the this clock provider + * @index: index for the clock provider + + @syscon: syscon regmap pointer + * @mem: iomem pointer for the clock provider memory area, only used if + * syscon is not provided + * + * Initializes a clock provider module (CM/PRM etc.), registering + * the memory mapping at specified index and initializing the + * low level driver infrastructure. Returns 0 in success. + */ +int __init omap2_clk_provider_init(struct device_node *np, int index, + struct regmap *syscon, void __iomem *mem) +{ + struct clk_iomap *io; + + ti_clk_ll_ops = &omap_clk_ll_ops; + + io = kzalloc(sizeof(*io), GFP_KERNEL); + + io->regmap = syscon; + io->mem = mem; + + clk_memmaps[index] = io; + + ti_dt_clk_init_provider(np, index); + + return 0; +} + +/** + * omap2_clk_legacy_provider_init - initialize a legacy clock provider + * @index: index for the clock provider + * @mem: iomem pointer for the clock provider memory area + * + * Initializes a legacy clock provider memory mapping. + */ +void __init omap2_clk_legacy_provider_init(int index, void __iomem *mem) +{ + struct clk_iomap *io; + + ti_clk_ll_ops = &omap_clk_ll_ops; + + io = memblock_virt_alloc(sizeof(*io), 0); + + io->mem = mem; + + clk_memmaps[index] = io; +} + +/* + * OMAP2+ specific clock functions + */ + +/* Private functions */ + + +/** + * _wait_idlest_generic - wait for a module to leave the idle state + * @clk: module clock to wait for (needed for register offsets) + * @reg: virtual address of module IDLEST register + * @mask: value to mask against to determine if the module is active + * @idlest: idle state indicator (0 or 1) for the clock + * @name: name of the clock (for printk) + * + * Wait for a module to leave idle, where its idle-status register is + * not inside the CM module. Returns 1 if the module left idle + * promptly, or 0 if the module did not leave idle before the timeout + * elapsed. XXX Deprecated - should be moved into drivers for the + * individual IP block that the IDLEST register exists in. + */ +static int _wait_idlest_generic(struct clk_hw_omap *clk, void __iomem *reg, + u32 mask, u8 idlest, const char *name) +{ + int i = 0, ena = 0; + + ena = (idlest) ? 0 : mask; + + omap_test_timeout(((omap2_clk_readl(clk, reg) & mask) == ena), + MAX_MODULE_ENABLE_WAIT, i); + + if (i < MAX_MODULE_ENABLE_WAIT) + pr_debug("omap clock: module associated with clock %s ready after %d loops\n", + name, i); + else + pr_err("omap clock: module associated with clock %s didn't enable in %d tries\n", + name, MAX_MODULE_ENABLE_WAIT); + + return (i < MAX_MODULE_ENABLE_WAIT) ? 1 : 0; +}; + +/** + * _omap2_module_wait_ready - wait for an OMAP module to leave IDLE + * @clk: struct clk * belonging to the module + * + * If the necessary clocks for the OMAP hardware IP block that + * corresponds to clock @clk are enabled, then wait for the module to + * indicate readiness (i.e., to leave IDLE). This code does not + * belong in the clock code and will be moved in the medium term to + * module-dependent code. No return value. + */ +static void _omap2_module_wait_ready(struct clk_hw_omap *clk) +{ + void __iomem *companion_reg, *idlest_reg; + u8 other_bit, idlest_bit, idlest_val, idlest_reg_id; + s16 prcm_mod; + int r; + + /* Not all modules have multiple clocks that their IDLEST depends on */ + if (clk->ops->find_companion) { + clk->ops->find_companion(clk, &companion_reg, &other_bit); + if (!(omap2_clk_readl(clk, companion_reg) & (1 << other_bit))) + return; + } + + clk->ops->find_idlest(clk, &idlest_reg, &idlest_bit, &idlest_val); + r = cm_split_idlest_reg(idlest_reg, &prcm_mod, &idlest_reg_id); + if (r) { + /* IDLEST register not in the CM module */ + _wait_idlest_generic(clk, idlest_reg, (1 << idlest_bit), + idlest_val, __clk_get_name(clk->hw.clk)); + } else { + omap_cm_wait_module_ready(0, prcm_mod, idlest_reg_id, + idlest_bit); + }; +} + +/* Public functions */ + +/** + * omap2_init_clk_clkdm - look up a clockdomain name, store pointer in clk + * @clk: OMAP clock struct ptr to use + * + * Convert a clockdomain name stored in a struct clk 'clk' into a + * clockdomain pointer, and save it into the struct clk. Intended to be + * called during clk_register(). No return value. + */ +void omap2_init_clk_clkdm(struct clk_hw *hw) +{ + struct clk_hw_omap *clk = to_clk_hw_omap(hw); + struct clockdomain *clkdm; + const char *clk_name; + + if (!clk->clkdm_name) + return; + + clk_name = __clk_get_name(hw->clk); + + clkdm = clkdm_lookup(clk->clkdm_name); + if (clkdm) { + pr_debug("clock: associated clk %s to clkdm %s\n", + clk_name, clk->clkdm_name); + clk->clkdm = clkdm; + } else { + pr_debug("clock: could not associate clk %s to clkdm %s\n", + clk_name, clk->clkdm_name); + } +} + +/** + * omap2_clk_disable_clkdm_control - disable clkdm control on clk enable/disable + * + * Prevent the OMAP clock code from calling into the clockdomain code + * when a hardware clock in that clockdomain is enabled or disabled. + * Intended to be called at init time from omap*_clk_init(). No + * return value. + */ +void __init omap2_clk_disable_clkdm_control(void) +{ + clkdm_control = false; +} + +/** + * omap2_clk_dflt_find_companion - find companion clock to @clk + * @clk: struct clk * to find the companion clock of + * @other_reg: void __iomem ** to return the companion clock CM_*CLKEN va in + * @other_bit: u8 ** to return the companion clock bit shift in + * + * Note: We don't need special code here for INVERT_ENABLE for the + * time being since INVERT_ENABLE only applies to clocks enabled by + * CM_CLKEN_PLL + * + * Convert CM_ICLKEN* <-> CM_FCLKEN*. This conversion assumes it's + * just a matter of XORing the bits. + * + * Some clocks don't have companion clocks. For example, modules with + * only an interface clock (such as MAILBOXES) don't have a companion + * clock. Right now, this code relies on the hardware exporting a bit + * in the correct companion register that indicates that the + * nonexistent 'companion clock' is active. Future patches will + * associate this type of code with per-module data structures to + * avoid this issue, and remove the casts. No return value. + */ +void omap2_clk_dflt_find_companion(struct clk_hw_omap *clk, + void __iomem **other_reg, u8 *other_bit) +{ + u32 r; + + /* + * Convert CM_ICLKEN* <-> CM_FCLKEN*. This conversion assumes + * it's just a matter of XORing the bits. + */ + r = ((__force u32)clk->enable_reg ^ (CM_FCLKEN ^ CM_ICLKEN)); + + *other_reg = (__force void __iomem *)r; + *other_bit = clk->enable_bit; +} + +/** + * omap2_clk_dflt_find_idlest - find CM_IDLEST reg va, bit shift for @clk + * @clk: struct clk * to find IDLEST info for + * @idlest_reg: void __iomem ** to return the CM_IDLEST va in + * @idlest_bit: u8 * to return the CM_IDLEST bit shift in + * @idlest_val: u8 * to return the idle status indicator + * + * Return the CM_IDLEST register address and bit shift corresponding + * to the module that "owns" this clock. This default code assumes + * that the CM_IDLEST bit shift is the CM_*CLKEN bit shift, and that + * the IDLEST register address ID corresponds to the CM_*CLKEN + * register address ID (e.g., that CM_FCLKEN2 corresponds to + * CM_IDLEST2). This is not true for all modules. No return value. + */ +void omap2_clk_dflt_find_idlest(struct clk_hw_omap *clk, + void __iomem **idlest_reg, u8 *idlest_bit, u8 *idlest_val) +{ + u32 r; + + r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20); + *idlest_reg = (__force void __iomem *)r; + *idlest_bit = clk->enable_bit; + + /* + * 24xx uses 0 to indicate not ready, and 1 to indicate ready. + * 34xx reverses this, just to keep us on our toes + * AM35xx uses both, depending on the module. + */ + *idlest_val = ti_clk_features.cm_idlest_val; +} + +/** + * omap2_dflt_clk_enable - enable a clock in the hardware + * @hw: struct clk_hw * of the clock to enable + * + * Enable the clock @hw in the hardware. We first call into the OMAP + * clockdomain code to "enable" the corresponding clockdomain if this + * is the first enabled user of the clockdomain. Then program the + * hardware to enable the clock. Then wait for the IP block that uses + * this clock to leave idle (if applicable). Returns the error value + * from clkdm_clk_enable() if it terminated with an error, or -EINVAL + * if @hw has a null clock enable_reg, or zero upon success. + */ +int omap2_dflt_clk_enable(struct clk_hw *hw) +{ + struct clk_hw_omap *clk; + u32 v; + int ret = 0; + + clk = to_clk_hw_omap(hw); + + if (clkdm_control && clk->clkdm) { + ret = clkdm_clk_enable(clk->clkdm, hw->clk); + if (ret) { + WARN(1, "%s: could not enable %s's clockdomain %s: %d\n", + __func__, __clk_get_name(hw->clk), + clk->clkdm->name, ret); + return ret; + } + } + + if (unlikely(clk->enable_reg == NULL)) { + pr_err("%s: %s missing enable_reg\n", __func__, + __clk_get_name(hw->clk)); + ret = -EINVAL; + goto err; + } + + /* FIXME should not have INVERT_ENABLE bit here */ + v = omap2_clk_readl(clk, clk->enable_reg); + if (clk->flags & INVERT_ENABLE) + v &= ~(1 << clk->enable_bit); + else + v |= (1 << clk->enable_bit); + omap2_clk_writel(v, clk, clk->enable_reg); + v = omap2_clk_readl(clk, clk->enable_reg); /* OCP barrier */ + + if (clk->ops && clk->ops->find_idlest) + _omap2_module_wait_ready(clk); + + return 0; + +err: + if (clkdm_control && clk->clkdm) + clkdm_clk_disable(clk->clkdm, hw->clk); + return ret; +} + +/** + * omap2_dflt_clk_disable - disable a clock in the hardware + * @hw: struct clk_hw * of the clock to disable + * + * Disable the clock @hw in the hardware, and call into the OMAP + * clockdomain code to "disable" the corresponding clockdomain if all + * clocks/hwmods in that clockdomain are now disabled. No return + * value. + */ +void omap2_dflt_clk_disable(struct clk_hw *hw) +{ + struct clk_hw_omap *clk; + u32 v; + + clk = to_clk_hw_omap(hw); + if (!clk->enable_reg) { + /* + * 'independent' here refers to a clock which is not + * controlled by its parent. + */ + pr_err("%s: independent clock %s has no enable_reg\n", + __func__, __clk_get_name(hw->clk)); + return; + } + + v = omap2_clk_readl(clk, clk->enable_reg); + if (clk->flags & INVERT_ENABLE) + v |= (1 << clk->enable_bit); + else + v &= ~(1 << clk->enable_bit); + omap2_clk_writel(v, clk, clk->enable_reg); + /* No OCP barrier needed here since it is a disable operation */ + + if (clkdm_control && clk->clkdm) + clkdm_clk_disable(clk->clkdm, hw->clk); +} + +/** + * omap2_clkops_enable_clkdm - increment usecount on clkdm of @hw + * @hw: struct clk_hw * of the clock being enabled + * + * Increment the usecount of the clockdomain of the clock pointed to + * by @hw; if the usecount is 1, the clockdomain will be "enabled." + * Only needed for clocks that don't use omap2_dflt_clk_enable() as + * their enable function pointer. Passes along the return value of + * clkdm_clk_enable(), -EINVAL if @hw is not associated with a + * clockdomain, or 0 if clock framework-based clockdomain control is + * not implemented. + */ +int omap2_clkops_enable_clkdm(struct clk_hw *hw) +{ + struct clk_hw_omap *clk; + int ret = 0; + + clk = to_clk_hw_omap(hw); + + if (unlikely(!clk->clkdm)) { + pr_err("%s: %s: no clkdm set ?!\n", __func__, + __clk_get_name(hw->clk)); + return -EINVAL; + } + + if (unlikely(clk->enable_reg)) + pr_err("%s: %s: should use dflt_clk_enable ?!\n", __func__, + __clk_get_name(hw->clk)); + + if (!clkdm_control) { + pr_err("%s: %s: clkfw-based clockdomain control disabled ?!\n", + __func__, __clk_get_name(hw->clk)); + return 0; + } + + ret = clkdm_clk_enable(clk->clkdm, hw->clk); + WARN(ret, "%s: could not enable %s's clockdomain %s: %d\n", + __func__, __clk_get_name(hw->clk), clk->clkdm->name, ret); + + return ret; +} + +/** + * omap2_clkops_disable_clkdm - decrement usecount on clkdm of @hw + * @hw: struct clk_hw * of the clock being disabled + * + * Decrement the usecount of the clockdomain of the clock pointed to + * by @hw; if the usecount is 0, the clockdomain will be "disabled." + * Only needed for clocks that don't use omap2_dflt_clk_disable() as their + * disable function pointer. No return value. + */ +void omap2_clkops_disable_clkdm(struct clk_hw *hw) +{ + struct clk_hw_omap *clk; + + clk = to_clk_hw_omap(hw); + + if (unlikely(!clk->clkdm)) { + pr_err("%s: %s: no clkdm set ?!\n", __func__, + __clk_get_name(hw->clk)); + return; + } + + if (unlikely(clk->enable_reg)) + pr_err("%s: %s: should use dflt_clk_disable ?!\n", __func__, + __clk_get_name(hw->clk)); + + if (!clkdm_control) { + pr_err("%s: %s: clkfw-based clockdomain control disabled ?!\n", + __func__, __clk_get_name(hw->clk)); + return; + } + + clkdm_clk_disable(clk->clkdm, hw->clk); +} + +/** + * omap2_dflt_clk_is_enabled - is clock enabled in the hardware? + * @hw: struct clk_hw * to check + * + * Return 1 if the clock represented by @hw is enabled in the + * hardware, or 0 otherwise. Intended for use in the struct + * clk_ops.is_enabled function pointer. + */ +int omap2_dflt_clk_is_enabled(struct clk_hw *hw) +{ + struct clk_hw_omap *clk = to_clk_hw_omap(hw); + u32 v; + + v = omap2_clk_readl(clk, clk->enable_reg); + + if (clk->flags & INVERT_ENABLE) + v ^= BIT(clk->enable_bit); + + v &= BIT(clk->enable_bit); + + return v ? 1 : 0; +} + +static int __initdata mpurate; + +/* + * By default we use the rate set by the bootloader. + * You can override this with mpurate= cmdline option. + */ +static int __init omap_clk_setup(char *str) +{ + get_option(&str, &mpurate); + + if (!mpurate) + return 1; + + if (mpurate < 1000) + mpurate *= 1000000; + + return 1; +} +__setup("mpurate=", omap_clk_setup); + +/** + * omap2_init_clk_hw_omap_clocks - initialize an OMAP clock + * @clk: struct clk * to initialize + * + * Add an OMAP clock @clk to the internal list of OMAP clocks. Used + * temporarily for autoidle handling, until this support can be + * integrated into the common clock framework code in some way. No + * return value. + */ +void omap2_init_clk_hw_omap_clocks(struct clk *clk) +{ + struct clk_hw_omap *c; + + if (__clk_get_flags(clk) & CLK_IS_BASIC) + return; + + c = to_clk_hw_omap(__clk_get_hw(clk)); + list_add(&c->node, &clk_hw_omap_clocks); +} + +/** + * omap2_clk_enable_autoidle_all - enable autoidle on all OMAP clocks that + * support it + * + * Enable clock autoidle on all OMAP clocks that have allow_idle + * function pointers associated with them. This function is intended + * to be temporary until support for this is added to the common clock + * code. Returns 0. + */ +int omap2_clk_enable_autoidle_all(void) +{ + struct clk_hw_omap *c; + + list_for_each_entry(c, &clk_hw_omap_clocks, node) + if (c->ops && c->ops->allow_idle) + c->ops->allow_idle(c); + + of_ti_clk_allow_autoidle_all(); + + return 0; +} + +/** + * omap2_clk_disable_autoidle_all - disable autoidle on all OMAP clocks that + * support it + * + * Disable clock autoidle on all OMAP clocks that have allow_idle + * function pointers associated with them. This function is intended + * to be temporary until support for this is added to the common clock + * code. Returns 0. + */ +int omap2_clk_disable_autoidle_all(void) +{ + struct clk_hw_omap *c; + + list_for_each_entry(c, &clk_hw_omap_clocks, node) + if (c->ops && c->ops->deny_idle) + c->ops->deny_idle(c); + + of_ti_clk_deny_autoidle_all(); + + return 0; +} + +/** + * omap2_clk_deny_idle - disable autoidle on an OMAP clock + * @clk: struct clk * to disable autoidle for + * + * Disable autoidle on an OMAP clock. + */ +int omap2_clk_deny_idle(struct clk *clk) +{ + struct clk_hw_omap *c; + + if (__clk_get_flags(clk) & CLK_IS_BASIC) + return -EINVAL; + + c = to_clk_hw_omap(__clk_get_hw(clk)); + if (c->ops && c->ops->deny_idle) + c->ops->deny_idle(c); + return 0; +} + +/** + * omap2_clk_allow_idle - enable autoidle on an OMAP clock + * @clk: struct clk * to enable autoidle for + * + * Enable autoidle on an OMAP clock. + */ +int omap2_clk_allow_idle(struct clk *clk) +{ + struct clk_hw_omap *c; + + if (__clk_get_flags(clk) & CLK_IS_BASIC) + return -EINVAL; + + c = to_clk_hw_omap(__clk_get_hw(clk)); + if (c->ops && c->ops->allow_idle) + c->ops->allow_idle(c); + return 0; +} + +/** + * omap2_clk_enable_init_clocks - prepare & enable a list of clocks + * @clk_names: ptr to an array of strings of clock names to enable + * @num_clocks: number of clock names in @clk_names + * + * Prepare and enable a list of clocks, named by @clk_names. No + * return value. XXX Deprecated; only needed until these clocks are + * properly claimed and enabled by the drivers or core code that uses + * them. XXX What code disables & calls clk_put on these clocks? + */ +void omap2_clk_enable_init_clocks(const char **clk_names, u8 num_clocks) +{ + struct clk *init_clk; + int i; + + for (i = 0; i < num_clocks; i++) { + init_clk = clk_get(NULL, clk_names[i]); + if (WARN(IS_ERR(init_clk), "could not find init clock %s\n", + clk_names[i])) + continue; + clk_prepare_enable(init_clk); + } +} + +const struct clk_hw_omap_ops clkhwops_wait = { + .find_idlest = omap2_clk_dflt_find_idlest, + .find_companion = omap2_clk_dflt_find_companion, +}; + +/** + * omap2_clk_switch_mpurate_at_boot - switch ARM MPU rate by boot-time argument + * @mpurate_ck_name: clk name of the clock to change rate + * + * Change the ARM MPU clock rate to the rate specified on the command + * line, if one was specified. @mpurate_ck_name should be + * "virt_prcm_set" on OMAP2xxx and "dpll1_ck" on OMAP34xx/OMAP36xx. + * XXX Does not handle voltage scaling - on OMAP2xxx this is currently + * handled by the virt_prcm_set clock, but this should be handled by + * the OPP layer. XXX This is intended to be handled by the OPP layer + * code in the near future and should be removed from the clock code. + * Returns -EINVAL if 'mpurate' is zero or if clk_set_rate() rejects + * the rate, -ENOENT if the struct clk referred to by @mpurate_ck_name + * cannot be found, or 0 upon success. + */ +int __init omap2_clk_switch_mpurate_at_boot(const char *mpurate_ck_name) +{ + struct clk *mpurate_ck; + int r; + + if (!mpurate) + return -EINVAL; + + mpurate_ck = clk_get(NULL, mpurate_ck_name); + if (WARN(IS_ERR(mpurate_ck), "Failed to get %s.\n", mpurate_ck_name)) + return -ENOENT; + + r = clk_set_rate(mpurate_ck, mpurate); + if (r < 0) { + WARN(1, "clock: %s: unable to set MPU rate to %d: %d\n", + mpurate_ck_name, mpurate, r); + clk_put(mpurate_ck); + return -EINVAL; + } + + calibrate_delay(); + clk_put(mpurate_ck); + + return 0; +} + +/** + * omap2_clk_print_new_rates - print summary of current clock tree rates + * @hfclkin_ck_name: clk name for the off-chip HF oscillator + * @core_ck_name: clk name for the on-chip CORE_CLK + * @mpu_ck_name: clk name for the ARM MPU clock + * + * Prints a short message to the console with the HFCLKIN oscillator + * rate, the rate of the CORE clock, and the rate of the ARM MPU clock. + * Called by the boot-time MPU rate switching code. XXX This is intended + * to be handled by the OPP layer code in the near future and should be + * removed from the clock code. No return value. + */ +void __init omap2_clk_print_new_rates(const char *hfclkin_ck_name, + const char *core_ck_name, + const char *mpu_ck_name) +{ + struct clk *hfclkin_ck, *core_ck, *mpu_ck; + unsigned long hfclkin_rate; + + mpu_ck = clk_get(NULL, mpu_ck_name); + if (WARN(IS_ERR(mpu_ck), "clock: failed to get %s.\n", mpu_ck_name)) + return; + + core_ck = clk_get(NULL, core_ck_name); + if (WARN(IS_ERR(core_ck), "clock: failed to get %s.\n", core_ck_name)) + return; + + hfclkin_ck = clk_get(NULL, hfclkin_ck_name); + if (WARN(IS_ERR(hfclkin_ck), "Failed to get %s.\n", hfclkin_ck_name)) + return; + + hfclkin_rate = clk_get_rate(hfclkin_ck); + + pr_info("Switched to new clocking rate (Crystal/Core/MPU): %ld.%01ld/%ld/%ld MHz\n", + (hfclkin_rate / 1000000), ((hfclkin_rate / 100000) % 10), + (clk_get_rate(core_ck) / 1000000), + (clk_get_rate(mpu_ck) / 1000000)); +} + +/** + * ti_clk_init_features - init clock features struct for the SoC + * + * Initializes the clock features struct based on the SoC type. + */ +void __init ti_clk_init_features(void) +{ + /* Fint setup for DPLLs */ + if (cpu_is_omap3430()) { + ti_clk_features.fint_min = OMAP3430_DPLL_FINT_BAND1_MIN; + ti_clk_features.fint_max = OMAP3430_DPLL_FINT_BAND2_MAX; + ti_clk_features.fint_band1_max = OMAP3430_DPLL_FINT_BAND1_MAX; + ti_clk_features.fint_band2_min = OMAP3430_DPLL_FINT_BAND2_MIN; + } else { + ti_clk_features.fint_min = OMAP3PLUS_DPLL_FINT_MIN; + ti_clk_features.fint_max = OMAP3PLUS_DPLL_FINT_MAX; + } + + /* Bypass value setup for DPLLs */ + if (cpu_is_omap24xx()) { + ti_clk_features.dpll_bypass_vals |= + (1 << OMAP2XXX_EN_DPLL_LPBYPASS) | + (1 << OMAP2XXX_EN_DPLL_FRBYPASS); + } else if (cpu_is_omap34xx()) { + ti_clk_features.dpll_bypass_vals |= + (1 << OMAP3XXX_EN_DPLL_LPBYPASS) | + (1 << OMAP3XXX_EN_DPLL_FRBYPASS); + } else if (soc_is_am33xx() || cpu_is_omap44xx() || soc_is_am43xx() || + soc_is_omap54xx() || soc_is_dra7xx()) { + ti_clk_features.dpll_bypass_vals |= + (1 << OMAP4XXX_EN_DPLL_LPBYPASS) | + (1 << OMAP4XXX_EN_DPLL_FRBYPASS) | + (1 << OMAP4XXX_EN_DPLL_MNBYPASS); + } + + /* Jitter correction only available on OMAP343X */ + if (cpu_is_omap343x()) + ti_clk_features.flags |= TI_CLK_DPLL_HAS_FREQSEL; + + /* Idlest value for interface clocks. + * 24xx uses 0 to indicate not ready, and 1 to indicate ready. + * 34xx reverses this, just to keep us on our toes + * AM35xx uses both, depending on the module. + */ + if (cpu_is_omap24xx()) + ti_clk_features.cm_idlest_val = OMAP24XX_CM_IDLEST_VAL; + else if (cpu_is_omap34xx()) + ti_clk_features.cm_idlest_val = OMAP34XX_CM_IDLEST_VAL; + + /* On OMAP3430 ES1.0, DPLL4 can't be re-programmed */ + if (omap_rev() == OMAP3430_REV_ES1_0) + ti_clk_features.flags |= TI_CLK_DPLL4_DENY_REPROGRAM; +} |