diff options
author | 2015-08-04 12:17:53 -0700 | |
---|---|---|
committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/clk/pxa | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/clk/pxa')
-rw-r--r-- | kernel/drivers/clk/pxa/Makefile | 4 | ||||
-rw-r--r-- | kernel/drivers/clk/pxa/clk-pxa.c | 108 | ||||
-rw-r--r-- | kernel/drivers/clk/pxa/clk-pxa.h | 108 | ||||
-rw-r--r-- | kernel/drivers/clk/pxa/clk-pxa25x.c | 273 | ||||
-rw-r--r-- | kernel/drivers/clk/pxa/clk-pxa27x.c | 377 | ||||
-rw-r--r-- | kernel/drivers/clk/pxa/clk-pxa3xx.c | 367 |
6 files changed, 1237 insertions, 0 deletions
diff --git a/kernel/drivers/clk/pxa/Makefile b/kernel/drivers/clk/pxa/Makefile new file mode 100644 index 000000000..38e37bf6b --- /dev/null +++ b/kernel/drivers/clk/pxa/Makefile @@ -0,0 +1,4 @@ +obj-y += clk-pxa.o +obj-$(CONFIG_PXA25x) += clk-pxa25x.o +obj-$(CONFIG_PXA27x) += clk-pxa27x.o +obj-$(CONFIG_PXA3xx) += clk-pxa3xx.o diff --git a/kernel/drivers/clk/pxa/clk-pxa.c b/kernel/drivers/clk/pxa/clk-pxa.c new file mode 100644 index 000000000..29cee9e8d --- /dev/null +++ b/kernel/drivers/clk/pxa/clk-pxa.c @@ -0,0 +1,108 @@ +/* + * Marvell PXA family clocks + * + * Copyright (C) 2014 Robert Jarzmik + * + * Common clock code for PXA clocks ("CKEN" type clocks + DT) + * + * 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> +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/of.h> + +#include <dt-bindings/clock/pxa-clock.h> +#include "clk-pxa.h" + +DEFINE_SPINLOCK(lock); + +static struct clk *pxa_clocks[CLK_MAX]; +static struct clk_onecell_data onecell_data = { + .clks = pxa_clocks, + .clk_num = CLK_MAX, +}; + +struct pxa_clk { + struct clk_hw hw; + struct clk_fixed_factor lp; + struct clk_fixed_factor hp; + struct clk_gate gate; + bool (*is_in_low_power)(void); +}; + +#define to_pxa_clk(_hw) container_of(_hw, struct pxa_clk, hw) + +static unsigned long cken_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct pxa_clk *pclk = to_pxa_clk(hw); + struct clk_fixed_factor *fix; + + if (!pclk->is_in_low_power || pclk->is_in_low_power()) + fix = &pclk->lp; + else + fix = &pclk->hp; + __clk_hw_set_clk(&fix->hw, hw); + return clk_fixed_factor_ops.recalc_rate(&fix->hw, parent_rate); +} + +static struct clk_ops cken_rate_ops = { + .recalc_rate = cken_recalc_rate, +}; + +static u8 cken_get_parent(struct clk_hw *hw) +{ + struct pxa_clk *pclk = to_pxa_clk(hw); + + if (!pclk->is_in_low_power) + return 0; + return pclk->is_in_low_power() ? 0 : 1; +} + +static struct clk_ops cken_mux_ops = { + .get_parent = cken_get_parent, + .set_parent = dummy_clk_set_parent, +}; + +void __init clkdev_pxa_register(int ckid, const char *con_id, + const char *dev_id, struct clk *clk) +{ + if (!IS_ERR(clk) && (ckid != CLK_NONE)) + pxa_clocks[ckid] = clk; + if (!IS_ERR(clk)) + clk_register_clkdev(clk, con_id, dev_id); +} + +int __init clk_pxa_cken_init(const struct desc_clk_cken *clks, int nb_clks) +{ + int i; + struct pxa_clk *pxa_clk; + struct clk *clk; + + for (i = 0; i < nb_clks; i++) { + pxa_clk = kzalloc(sizeof(*pxa_clk), GFP_KERNEL); + pxa_clk->is_in_low_power = clks[i].is_in_low_power; + pxa_clk->lp = clks[i].lp; + pxa_clk->hp = clks[i].hp; + pxa_clk->gate = clks[i].gate; + pxa_clk->gate.lock = &lock; + clk = clk_register_composite(NULL, clks[i].name, + clks[i].parent_names, 2, + &pxa_clk->hw, &cken_mux_ops, + &pxa_clk->hw, &cken_rate_ops, + &pxa_clk->gate.hw, &clk_gate_ops, + clks[i].flags); + clkdev_pxa_register(clks[i].ckid, clks[i].con_id, + clks[i].dev_id, clk); + } + return 0; +} + +void __init clk_pxa_dt_common_init(struct device_node *np) +{ + of_clk_add_provider(np, of_clk_src_onecell_get, &onecell_data); +} diff --git a/kernel/drivers/clk/pxa/clk-pxa.h b/kernel/drivers/clk/pxa/clk-pxa.h new file mode 100644 index 000000000..b04c5b9c0 --- /dev/null +++ b/kernel/drivers/clk/pxa/clk-pxa.h @@ -0,0 +1,108 @@ +/* + * Marvell PXA family clocks + * + * Copyright (C) 2014 Robert Jarzmik + * + * Common clock code for PXA clocks ("CKEN" type clocks + DT) + * + * 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. + * + */ +#ifndef _CLK_PXA_ +#define _CLK_PXA_ + +#define PARENTS(name) \ + static const char *name ## _parents[] __initdata +#define MUX_RO_RATE_RO_OPS(name, clk_name) \ + static struct clk_hw name ## _mux_hw; \ + static struct clk_hw name ## _rate_hw; \ + static struct clk_ops name ## _mux_ops = { \ + .get_parent = name ## _get_parent, \ + .set_parent = dummy_clk_set_parent, \ + }; \ + static struct clk_ops name ## _rate_ops = { \ + .recalc_rate = name ## _get_rate, \ + }; \ + static struct clk * __init clk_register_ ## name(void) \ + { \ + return clk_register_composite(NULL, clk_name, \ + name ## _parents, \ + ARRAY_SIZE(name ## _parents), \ + &name ## _mux_hw, &name ## _mux_ops, \ + &name ## _rate_hw, &name ## _rate_ops, \ + NULL, NULL, CLK_GET_RATE_NOCACHE); \ + } + +#define RATE_RO_OPS(name, clk_name) \ + static struct clk_hw name ## _rate_hw; \ + static struct clk_ops name ## _rate_ops = { \ + .recalc_rate = name ## _get_rate, \ + }; \ + static struct clk * __init clk_register_ ## name(void) \ + { \ + return clk_register_composite(NULL, clk_name, \ + name ## _parents, \ + ARRAY_SIZE(name ## _parents), \ + NULL, NULL, \ + &name ## _rate_hw, &name ## _rate_ops, \ + NULL, NULL, CLK_GET_RATE_NOCACHE); \ + } + +/* + * CKEN clock type + * This clock takes it source from 2 possible parents : + * - a low power parent + * - a normal parent + * + * +------------+ +-----------+ + * | Low Power | --- | x mult_lp | + * | Clock | | / div_lp |\ + * +------------+ +-----------+ \+-----+ +-----------+ + * | Mux |---| CKEN gate | + * +------------+ +-----------+ /+-----+ +-----------+ + * | High Power | | x mult_hp |/ + * | Clock | --- | / div_hp | + * +------------+ +-----------+ + */ +struct desc_clk_cken { + struct clk_hw hw; + int ckid; + const char *name; + const char *dev_id; + const char *con_id; + const char **parent_names; + struct clk_fixed_factor lp; + struct clk_fixed_factor hp; + struct clk_gate gate; + bool (*is_in_low_power)(void); + const unsigned long flags; +}; + +#define PXA_CKEN(_dev_id, _con_id, _name, parents, _mult_lp, _div_lp, \ + _mult_hp, _div_hp, is_lp, _cken_reg, _cken_bit, flag) \ + { .ckid = CLK_ ## _name, .name = #_name, \ + .dev_id = _dev_id, .con_id = _con_id, .parent_names = parents,\ + .lp = { .mult = _mult_lp, .div = _div_lp }, \ + .hp = { .mult = _mult_hp, .div = _div_hp }, \ + .is_in_low_power = is_lp, \ + .gate = { .reg = (void __iomem *)_cken_reg, .bit_idx = _cken_bit }, \ + .flags = flag, \ + } +#define PXA_CKEN_1RATE(dev_id, con_id, name, parents, cken_reg, \ + cken_bit, flag) \ + PXA_CKEN(dev_id, con_id, name, parents, 1, 1, 1, 1, \ + NULL, cken_reg, cken_bit, flag) + +static int dummy_clk_set_parent(struct clk_hw *hw, u8 index) +{ + return 0; +} + +extern void clkdev_pxa_register(int ckid, const char *con_id, + const char *dev_id, struct clk *clk); +extern int clk_pxa_cken_init(const struct desc_clk_cken *clks, int nb_clks); +void clk_pxa_dt_common_init(struct device_node *np); + +#endif diff --git a/kernel/drivers/clk/pxa/clk-pxa25x.c b/kernel/drivers/clk/pxa/clk-pxa25x.c new file mode 100644 index 000000000..6cd88d963 --- /dev/null +++ b/kernel/drivers/clk/pxa/clk-pxa25x.c @@ -0,0 +1,273 @@ +/* + * Marvell PXA25x family clocks + * + * Copyright (C) 2014 Robert Jarzmik + * + * Heavily inspired from former arch/arm/mach-pxa/pxa25x.c. + * + * 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. + * + * For non-devicetree platforms. Once pxa is fully converted to devicetree, this + * should go away. + */ +#include <linux/clk-provider.h> +#include <linux/clk.h> +#include <linux/clkdev.h> +#include <linux/io.h> +#include <linux/of.h> +#include <mach/pxa25x.h> +#include <mach/pxa2xx-regs.h> + +#include <dt-bindings/clock/pxa-clock.h> +#include "clk-pxa.h" + +#define KHz 1000 +#define MHz (1000 * 1000) + +enum { + PXA_CORE_RUN = 0, + PXA_CORE_TURBO, +}; + +/* + * Various clock factors driven by the CCCR register. + */ + +/* Crystal Frequency to Memory Frequency Multiplier (L) */ +static unsigned char L_clk_mult[32] = { 0, 27, 32, 36, 40, 45, 0, }; + +/* Memory Frequency to Run Mode Frequency Multiplier (M) */ +static unsigned char M_clk_mult[4] = { 0, 1, 2, 4 }; + +/* Run Mode Frequency to Turbo Mode Frequency Multiplier (N) */ +/* Note: we store the value N * 2 here. */ +static unsigned char N2_clk_mult[8] = { 0, 0, 2, 3, 4, 0, 6, 0 }; + +static const char * const get_freq_khz[] = { + "core", "run", "cpll", "memory" +}; + +/* + * Get the clock frequency as reflected by CCCR and the turbo flag. + * We assume these values have been applied via a fcs. + * If info is not 0 we also display the current settings. + */ +unsigned int pxa25x_get_clk_frequency_khz(int info) +{ + struct clk *clk; + unsigned long clks[5]; + int i; + + for (i = 0; i < ARRAY_SIZE(get_freq_khz); i++) { + clk = clk_get(NULL, get_freq_khz[i]); + if (IS_ERR(clk)) { + clks[i] = 0; + } else { + clks[i] = clk_get_rate(clk); + clk_put(clk); + } + } + + if (info) { + pr_info("Run Mode clock: %ld.%02ldMHz\n", + clks[1] / 1000000, (clks[1] % 1000000) / 10000); + pr_info("Turbo Mode clock: %ld.%02ldMHz\n", + clks[2] / 1000000, (clks[2] % 1000000) / 10000); + pr_info("Memory clock: %ld.%02ldMHz\n", + clks[3] / 1000000, (clks[3] % 1000000) / 10000); + } + + return (unsigned int)clks[0]; +} + +static unsigned long clk_pxa25x_memory_get_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + unsigned long cccr = CCCR; + unsigned int m = M_clk_mult[(cccr >> 5) & 0x03]; + + return parent_rate / m; +} +PARENTS(clk_pxa25x_memory) = { "run" }; +RATE_RO_OPS(clk_pxa25x_memory, "memory"); + +PARENTS(pxa25x_pbus95) = { "ppll_95_85mhz", "ppll_95_85mhz" }; +PARENTS(pxa25x_pbus147) = { "ppll_147_46mhz", "ppll_147_46mhz" }; +PARENTS(pxa25x_osc3) = { "osc_3_6864mhz", "osc_3_6864mhz" }; + +#define PXA25X_CKEN(dev_id, con_id, parents, mult, div, \ + bit, is_lp, flags) \ + PXA_CKEN(dev_id, con_id, bit, parents, mult, div, mult, div, \ + is_lp, &CKEN, CKEN_ ## bit, flags) +#define PXA25X_PBUS95_CKEN(dev_id, con_id, bit, mult_hp, div_hp, delay) \ + PXA25X_CKEN(dev_id, con_id, pxa25x_pbus95_parents, mult_hp, \ + div_hp, bit, NULL, 0) +#define PXA25X_PBUS147_CKEN(dev_id, con_id, bit, mult_hp, div_hp, delay)\ + PXA25X_CKEN(dev_id, con_id, pxa25x_pbus147_parents, mult_hp, \ + div_hp, bit, NULL, 0) +#define PXA25X_OSC3_CKEN(dev_id, con_id, bit, mult_hp, div_hp, delay) \ + PXA25X_CKEN(dev_id, con_id, pxa25x_osc3_parents, mult_hp, \ + div_hp, bit, NULL, 0) + +#define PXA25X_CKEN_1RATE(dev_id, con_id, bit, parents, delay) \ + PXA_CKEN_1RATE(dev_id, con_id, bit, parents, \ + &CKEN, CKEN_ ## bit, 0) +#define PXA25X_CKEN_1RATE_AO(dev_id, con_id, bit, parents, delay) \ + PXA_CKEN_1RATE(dev_id, con_id, bit, parents, \ + &CKEN, CKEN_ ## bit, CLK_IGNORE_UNUSED) + +static struct desc_clk_cken pxa25x_clocks[] __initdata = { + PXA25X_PBUS95_CKEN("pxa2xx-mci.0", NULL, MMC, 1, 5, 0), + PXA25X_PBUS95_CKEN("pxa2xx-i2c.0", NULL, I2C, 1, 3, 0), + PXA25X_PBUS95_CKEN("pxa2xx-ir", "FICPCLK", FICP, 1, 2, 0), + PXA25X_PBUS95_CKEN("pxa25x-udc", NULL, USB, 1, 2, 5), + PXA25X_PBUS147_CKEN("pxa2xx-uart.0", NULL, FFUART, 1, 10, 1), + PXA25X_PBUS147_CKEN("pxa2xx-uart.1", NULL, BTUART, 1, 10, 1), + PXA25X_PBUS147_CKEN("pxa2xx-uart.2", NULL, STUART, 1, 10, 1), + PXA25X_PBUS147_CKEN("pxa2xx-uart.3", NULL, HWUART, 1, 10, 1), + PXA25X_PBUS147_CKEN("pxa2xx-i2s", NULL, I2S, 1, 10, 0), + PXA25X_PBUS147_CKEN(NULL, "AC97CLK", AC97, 1, 12, 0), + PXA25X_OSC3_CKEN("pxa25x-ssp.0", NULL, SSP, 1, 1, 0), + PXA25X_OSC3_CKEN("pxa25x-nssp.1", NULL, NSSP, 1, 1, 0), + PXA25X_OSC3_CKEN("pxa25x-nssp.2", NULL, ASSP, 1, 1, 0), + PXA25X_OSC3_CKEN("pxa25x-pwm.0", NULL, PWM0, 1, 1, 0), + PXA25X_OSC3_CKEN("pxa25x-pwm.1", NULL, PWM1, 1, 1, 0), + + PXA25X_CKEN_1RATE("pxa2xx-fb", NULL, LCD, clk_pxa25x_memory_parents, 0), + PXA25X_CKEN_1RATE_AO("pxa2xx-pcmcia", NULL, MEMC, + clk_pxa25x_memory_parents, 0), +}; + +static u8 clk_pxa25x_core_get_parent(struct clk_hw *hw) +{ + unsigned long clkcfg; + unsigned int t; + + asm("mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg)); + t = clkcfg & (1 << 0); + if (t) + return PXA_CORE_TURBO; + return PXA_CORE_RUN; +} + +static unsigned long clk_pxa25x_core_get_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + return parent_rate; +} +PARENTS(clk_pxa25x_core) = { "run", "cpll" }; +MUX_RO_RATE_RO_OPS(clk_pxa25x_core, "core"); + +static unsigned long clk_pxa25x_run_get_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + unsigned long cccr = CCCR; + unsigned int n2 = N2_clk_mult[(cccr >> 7) & 0x07]; + + return (parent_rate / n2) * 2; +} +PARENTS(clk_pxa25x_run) = { "cpll" }; +RATE_RO_OPS(clk_pxa25x_run, "run"); + +static unsigned long clk_pxa25x_cpll_get_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + unsigned long clkcfg, cccr = CCCR; + unsigned int l, m, n2, t; + + asm("mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg)); + t = clkcfg & (1 << 0); + l = L_clk_mult[(cccr >> 0) & 0x1f]; + m = M_clk_mult[(cccr >> 5) & 0x03]; + n2 = N2_clk_mult[(cccr >> 7) & 0x07]; + + if (t) + return m * l * n2 * parent_rate / 2; + return m * l * parent_rate; +} +PARENTS(clk_pxa25x_cpll) = { "osc_3_6864mhz" }; +RATE_RO_OPS(clk_pxa25x_cpll, "cpll"); + +static void __init pxa25x_register_core(void) +{ + clk_register_clk_pxa25x_cpll(); + clk_register_clk_pxa25x_run(); + clkdev_pxa_register(CLK_CORE, "core", NULL, + clk_register_clk_pxa25x_core()); +} + +static void __init pxa25x_register_plls(void) +{ + clk_register_fixed_rate(NULL, "osc_3_6864mhz", NULL, + CLK_GET_RATE_NOCACHE | CLK_IS_ROOT, + 3686400); + clk_register_fixed_rate(NULL, "osc_32_768khz", NULL, + CLK_GET_RATE_NOCACHE | CLK_IS_ROOT, + 32768); + clk_register_fixed_rate(NULL, "clk_dummy", NULL, CLK_IS_ROOT, 0); + clk_register_fixed_factor(NULL, "ppll_95_85mhz", "osc_3_6864mhz", + 0, 26, 1); + clk_register_fixed_factor(NULL, "ppll_147_46mhz", "osc_3_6864mhz", + 0, 40, 1); +} + +static void __init pxa25x_base_clocks_init(void) +{ + pxa25x_register_plls(); + pxa25x_register_core(); + clk_register_clk_pxa25x_memory(); +} + +#define DUMMY_CLK(_con_id, _dev_id, _parent) \ + { .con_id = _con_id, .dev_id = _dev_id, .parent = _parent } +struct dummy_clk { + const char *con_id; + const char *dev_id; + const char *parent; +}; +static struct dummy_clk dummy_clks[] __initdata = { + DUMMY_CLK(NULL, "pxa25x-gpio", "osc_32_768khz"), + DUMMY_CLK(NULL, "pxa26x-gpio", "osc_32_768khz"), + DUMMY_CLK("GPIO11_CLK", NULL, "osc_3_6864mhz"), + DUMMY_CLK("GPIO12_CLK", NULL, "osc_32_768khz"), + DUMMY_CLK(NULL, "sa1100-rtc", "osc_32_768khz"), + DUMMY_CLK("OSTIMER0", NULL, "osc_32_768khz"), + DUMMY_CLK("UARTCLK", "pxa2xx-ir", "STUART"), +}; + +static void __init pxa25x_dummy_clocks_init(void) +{ + struct clk *clk; + struct dummy_clk *d; + const char *name; + int i; + + /* + * All pinctrl logic has been wiped out of the clock driver, especially + * for gpio11 and gpio12 outputs. Machine code should ensure proper pin + * control (ie. pxa2xx_mfp_config() invocation). + */ + for (i = 0; i < ARRAY_SIZE(dummy_clks); i++) { + d = &dummy_clks[i]; + name = d->dev_id ? d->dev_id : d->con_id; + clk = clk_register_fixed_factor(NULL, name, d->parent, 0, 1, 1); + clk_register_clkdev(clk, d->con_id, d->dev_id); + } +} + +int __init pxa25x_clocks_init(void) +{ + pxa25x_base_clocks_init(); + pxa25x_dummy_clocks_init(); + return clk_pxa_cken_init(pxa25x_clocks, ARRAY_SIZE(pxa25x_clocks)); +} + +static void __init pxa25x_dt_clocks_init(struct device_node *np) +{ + pxa25x_clocks_init(); + clk_pxa_dt_common_init(np); +} +CLK_OF_DECLARE(pxa25x_clks, "marvell,pxa250-core-clocks", + pxa25x_dt_clocks_init); diff --git a/kernel/drivers/clk/pxa/clk-pxa27x.c b/kernel/drivers/clk/pxa/clk-pxa27x.c new file mode 100644 index 000000000..5f9b54b02 --- /dev/null +++ b/kernel/drivers/clk/pxa/clk-pxa27x.c @@ -0,0 +1,377 @@ +/* + * Marvell PXA27x family clocks + * + * Copyright (C) 2014 Robert Jarzmik + * + * Heavily inspired from former arch/arm/mach-pxa/clock.c. + * + * 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-provider.h> +#include <mach/pxa2xx-regs.h> +#include <linux/io.h> +#include <linux/clk.h> +#include <linux/clkdev.h> +#include <linux/of.h> + +#include <dt-bindings/clock/pxa-clock.h> +#include "clk-pxa.h" + +#define KHz 1000 +#define MHz (1000 * 1000) + +enum { + PXA_CORE_13Mhz = 0, + PXA_CORE_RUN, + PXA_CORE_TURBO, +}; + +enum { + PXA_BUS_13Mhz = 0, + PXA_BUS_RUN, +}; + +enum { + PXA_LCD_13Mhz = 0, + PXA_LCD_RUN, +}; + +enum { + PXA_MEM_13Mhz = 0, + PXA_MEM_SYSTEM_BUS, + PXA_MEM_RUN, +}; + +static const char * const get_freq_khz[] = { + "core", "run", "cpll", "memory", + "system_bus" +}; + +/* + * Get the clock frequency as reflected by CCSR and the turbo flag. + * We assume these values have been applied via a fcs. + * If info is not 0 we also display the current settings. + */ +unsigned int pxa27x_get_clk_frequency_khz(int info) +{ + struct clk *clk; + unsigned long clks[5]; + int i; + + for (i = 0; i < 5; i++) { + clk = clk_get(NULL, get_freq_khz[i]); + if (IS_ERR(clk)) { + clks[i] = 0; + } else { + clks[i] = clk_get_rate(clk); + clk_put(clk); + } + } + if (info) { + pr_info("Run Mode clock: %ld.%02ldMHz\n", + clks[1] / 1000000, (clks[1] % 1000000) / 10000); + pr_info("Turbo Mode clock: %ld.%02ldMHz\n", + clks[2] / 1000000, (clks[2] % 1000000) / 10000); + pr_info("Memory clock: %ld.%02ldMHz\n", + clks[3] / 1000000, (clks[3] % 1000000) / 10000); + pr_info("System bus clock: %ld.%02ldMHz\n", + clks[4] / 1000000, (clks[4] % 1000000) / 10000); + } + return (unsigned int)clks[0]; +} + +bool pxa27x_is_ppll_disabled(void) +{ + unsigned long ccsr = CCSR; + + return ccsr & (1 << CCCR_PPDIS_BIT); +} + +#define PXA27X_CKEN(dev_id, con_id, parents, mult_hp, div_hp, \ + bit, is_lp, flags) \ + PXA_CKEN(dev_id, con_id, bit, parents, 1, 1, mult_hp, div_hp, \ + is_lp, &CKEN, CKEN_ ## bit, flags) +#define PXA27X_PBUS_CKEN(dev_id, con_id, bit, mult_hp, div_hp, delay) \ + PXA27X_CKEN(dev_id, con_id, pxa27x_pbus_parents, mult_hp, \ + div_hp, bit, pxa27x_is_ppll_disabled, 0) + +PARENTS(pxa27x_pbus) = { "osc_13mhz", "ppll_312mhz" }; +PARENTS(pxa27x_sbus) = { "system_bus", "system_bus" }; +PARENTS(pxa27x_32Mhz_bus) = { "osc_32_768khz", "osc_32_768khz" }; +PARENTS(pxa27x_lcd_bus) = { "lcd_base", "lcd_base" }; +PARENTS(pxa27x_membus) = { "lcd_base", "lcd_base" }; + +#define PXA27X_CKEN_1RATE(dev_id, con_id, bit, parents, delay) \ + PXA_CKEN_1RATE(dev_id, con_id, bit, parents, \ + &CKEN, CKEN_ ## bit, 0) +#define PXA27X_CKEN_1RATE_AO(dev_id, con_id, bit, parents, delay) \ + PXA_CKEN_1RATE(dev_id, con_id, bit, parents, \ + &CKEN, CKEN_ ## bit, CLK_IGNORE_UNUSED) + +static struct desc_clk_cken pxa27x_clocks[] __initdata = { + PXA27X_PBUS_CKEN("pxa2xx-uart.0", NULL, FFUART, 2, 42, 1), + PXA27X_PBUS_CKEN("pxa2xx-uart.1", NULL, BTUART, 2, 42, 1), + PXA27X_PBUS_CKEN("pxa2xx-uart.2", NULL, STUART, 2, 42, 1), + PXA27X_PBUS_CKEN("pxa2xx-i2s", NULL, I2S, 2, 51, 0), + PXA27X_PBUS_CKEN("pxa2xx-i2c.0", NULL, I2C, 2, 19, 0), + PXA27X_PBUS_CKEN("pxa27x-udc", NULL, USB, 2, 13, 5), + PXA27X_PBUS_CKEN("pxa2xx-mci.0", NULL, MMC, 2, 32, 0), + PXA27X_PBUS_CKEN("pxa2xx-ir", "FICPCLK", FICP, 2, 13, 0), + PXA27X_PBUS_CKEN("pxa27x-ohci", NULL, USBHOST, 2, 13, 0), + PXA27X_PBUS_CKEN("pxa2xx-i2c.1", NULL, PWRI2C, 1, 24, 0), + PXA27X_PBUS_CKEN("pxa27x-ssp.0", NULL, SSP1, 1, 24, 0), + PXA27X_PBUS_CKEN("pxa27x-ssp.1", NULL, SSP2, 1, 24, 0), + PXA27X_PBUS_CKEN("pxa27x-ssp.2", NULL, SSP3, 1, 24, 0), + PXA27X_PBUS_CKEN("pxa27x-pwm.0", NULL, PWM0, 1, 24, 0), + PXA27X_PBUS_CKEN("pxa27x-pwm.1", NULL, PWM1, 1, 24, 0), + PXA27X_PBUS_CKEN(NULL, "MSLCLK", MSL, 2, 13, 0), + PXA27X_PBUS_CKEN(NULL, "USIMCLK", USIM, 2, 13, 0), + PXA27X_PBUS_CKEN(NULL, "MSTKCLK", MEMSTK, 2, 32, 0), + PXA27X_PBUS_CKEN(NULL, "AC97CLK", AC97, 1, 1, 0), + PXA27X_PBUS_CKEN(NULL, "AC97CONFCLK", AC97CONF, 1, 1, 0), + PXA27X_PBUS_CKEN(NULL, "OSTIMER0", OSTIMER, 1, 96, 0), + + PXA27X_CKEN_1RATE("pxa27x-keypad", NULL, KEYPAD, + pxa27x_32Mhz_bus_parents, 0), + PXA27X_CKEN_1RATE(NULL, "IMCLK", IM, pxa27x_sbus_parents, 0), + PXA27X_CKEN_1RATE("pxa2xx-fb", NULL, LCD, pxa27x_lcd_bus_parents, 0), + PXA27X_CKEN_1RATE("pxa27x-camera.0", NULL, CAMERA, + pxa27x_lcd_bus_parents, 0), + PXA27X_CKEN_1RATE_AO("pxa2xx-pcmcia", NULL, MEMC, + pxa27x_membus_parents, 0), + +}; + +static unsigned long clk_pxa27x_cpll_get_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + unsigned long clkcfg; + unsigned int t, ht; + unsigned int l, L, n2, N; + unsigned long ccsr = CCSR; + + asm("mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg)); + t = clkcfg & (1 << 0); + ht = clkcfg & (1 << 2); + + l = ccsr & CCSR_L_MASK; + n2 = (ccsr & CCSR_N2_MASK) >> CCSR_N2_SHIFT; + L = l * parent_rate; + N = (L * n2) / 2; + + return t ? N : L; +} +PARENTS(clk_pxa27x_cpll) = { "osc_13mhz" }; +RATE_RO_OPS(clk_pxa27x_cpll, "cpll"); + +static unsigned long clk_pxa27x_lcd_base_get_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + unsigned int l, osc_forced; + unsigned long ccsr = CCSR; + unsigned long cccr = CCCR; + + l = ccsr & CCSR_L_MASK; + osc_forced = ccsr & (1 << CCCR_CPDIS_BIT); + if (osc_forced) { + if (cccr & (1 << CCCR_LCD_26_BIT)) + return parent_rate * 2; + else + return parent_rate; + } + + if (l <= 7) + return parent_rate; + if (l <= 16) + return parent_rate / 2; + return parent_rate / 4; +} + +static u8 clk_pxa27x_lcd_base_get_parent(struct clk_hw *hw) +{ + unsigned int osc_forced; + unsigned long ccsr = CCSR; + + osc_forced = ccsr & (1 << CCCR_CPDIS_BIT); + if (osc_forced) + return PXA_LCD_13Mhz; + else + return PXA_LCD_RUN; +} + +PARENTS(clk_pxa27x_lcd_base) = { "osc_13mhz", "run" }; +MUX_RO_RATE_RO_OPS(clk_pxa27x_lcd_base, "lcd_base"); + +static void __init pxa27x_register_plls(void) +{ + clk_register_fixed_rate(NULL, "osc_13mhz", NULL, + CLK_GET_RATE_NOCACHE | CLK_IS_ROOT, + 13 * MHz); + clk_register_fixed_rate(NULL, "osc_32_768khz", NULL, + CLK_GET_RATE_NOCACHE | CLK_IS_ROOT, + 32768 * KHz); + clk_register_fixed_rate(NULL, "clk_dummy", NULL, CLK_IS_ROOT, 0); + clk_register_fixed_factor(NULL, "ppll_312mhz", "osc_13mhz", 0, 24, 1); +} + +static unsigned long clk_pxa27x_core_get_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + unsigned long clkcfg; + unsigned int t, ht, b, osc_forced; + unsigned long ccsr = CCSR; + + osc_forced = ccsr & (1 << CCCR_CPDIS_BIT); + asm("mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg)); + t = clkcfg & (1 << 0); + ht = clkcfg & (1 << 2); + b = clkcfg & (1 << 3); + + if (osc_forced) + return parent_rate; + if (ht) + return parent_rate / 2; + else + return parent_rate; +} + +static u8 clk_pxa27x_core_get_parent(struct clk_hw *hw) +{ + unsigned long clkcfg; + unsigned int t, ht, b, osc_forced; + unsigned long ccsr = CCSR; + + osc_forced = ccsr & (1 << CCCR_CPDIS_BIT); + if (osc_forced) + return PXA_CORE_13Mhz; + + asm("mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg)); + t = clkcfg & (1 << 0); + ht = clkcfg & (1 << 2); + b = clkcfg & (1 << 3); + + if (ht || t) + return PXA_CORE_TURBO; + return PXA_CORE_RUN; +} +PARENTS(clk_pxa27x_core) = { "osc_13mhz", "run", "cpll" }; +MUX_RO_RATE_RO_OPS(clk_pxa27x_core, "core"); + +static unsigned long clk_pxa27x_run_get_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + unsigned long ccsr = CCSR; + unsigned int n2 = (ccsr & CCSR_N2_MASK) >> CCSR_N2_SHIFT; + + return (parent_rate / n2) * 2; +} +PARENTS(clk_pxa27x_run) = { "cpll" }; +RATE_RO_OPS(clk_pxa27x_run, "run"); + +static void __init pxa27x_register_core(void) +{ + clk_register_clk_pxa27x_cpll(); + clk_register_clk_pxa27x_run(); + + clkdev_pxa_register(CLK_CORE, "core", NULL, + clk_register_clk_pxa27x_core()); +} + +static unsigned long clk_pxa27x_system_bus_get_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + unsigned long clkcfg; + unsigned int b, osc_forced; + unsigned long ccsr = CCSR; + + osc_forced = ccsr & (1 << CCCR_CPDIS_BIT); + asm("mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg)); + b = clkcfg & (1 << 3); + + if (osc_forced) + return parent_rate; + if (b) + return parent_rate / 2; + else + return parent_rate; +} + +static u8 clk_pxa27x_system_bus_get_parent(struct clk_hw *hw) +{ + unsigned int osc_forced; + unsigned long ccsr = CCSR; + + osc_forced = ccsr & (1 << CCCR_CPDIS_BIT); + if (osc_forced) + return PXA_BUS_13Mhz; + else + return PXA_BUS_RUN; +} + +PARENTS(clk_pxa27x_system_bus) = { "osc_13mhz", "run" }; +MUX_RO_RATE_RO_OPS(clk_pxa27x_system_bus, "system_bus"); + +static unsigned long clk_pxa27x_memory_get_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + unsigned int a, l, osc_forced; + unsigned long cccr = CCCR; + unsigned long ccsr = CCSR; + + osc_forced = ccsr & (1 << CCCR_CPDIS_BIT); + a = cccr & (1 << CCCR_A_BIT); + l = ccsr & CCSR_L_MASK; + + if (osc_forced || a) + return parent_rate; + if (l <= 10) + return parent_rate; + if (l <= 20) + return parent_rate / 2; + return parent_rate / 4; +} + +static u8 clk_pxa27x_memory_get_parent(struct clk_hw *hw) +{ + unsigned int osc_forced, a; + unsigned long cccr = CCCR; + unsigned long ccsr = CCSR; + + osc_forced = ccsr & (1 << CCCR_CPDIS_BIT); + a = cccr & (1 << CCCR_A_BIT); + if (osc_forced) + return PXA_MEM_13Mhz; + if (a) + return PXA_MEM_SYSTEM_BUS; + else + return PXA_MEM_RUN; +} + +PARENTS(clk_pxa27x_memory) = { "osc_13mhz", "system_bus", "run" }; +MUX_RO_RATE_RO_OPS(clk_pxa27x_memory, "memory"); + +static void __init pxa27x_base_clocks_init(void) +{ + pxa27x_register_plls(); + pxa27x_register_core(); + clk_register_clk_pxa27x_system_bus(); + clk_register_clk_pxa27x_memory(); + clk_register_clk_pxa27x_lcd_base(); +} + +static int __init pxa27x_clocks_init(void) +{ + pxa27x_base_clocks_init(); + return clk_pxa_cken_init(pxa27x_clocks, ARRAY_SIZE(pxa27x_clocks)); +} +postcore_initcall(pxa27x_clocks_init); + +static void __init pxa27x_dt_clocks_init(struct device_node *np) +{ + pxa27x_clocks_init(); + clk_pxa_dt_common_init(np); +} +CLK_OF_DECLARE(pxa_clks, "marvell,pxa270-clocks", pxa27x_dt_clocks_init); diff --git a/kernel/drivers/clk/pxa/clk-pxa3xx.c b/kernel/drivers/clk/pxa/clk-pxa3xx.c new file mode 100644 index 000000000..4b93a1efb --- /dev/null +++ b/kernel/drivers/clk/pxa/clk-pxa3xx.c @@ -0,0 +1,367 @@ +/* + * Marvell PXA3xxx family clocks + * + * Copyright (C) 2014 Robert Jarzmik + * + * Heavily inspired from former arch/arm/mach-pxa/pxa3xx.c + * + * 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. + * + * For non-devicetree platforms. Once pxa is fully converted to devicetree, this + * should go away. + */ +#include <linux/io.h> +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/of.h> +#include <mach/smemc.h> +#include <mach/pxa3xx-regs.h> + +#include <dt-bindings/clock/pxa-clock.h> +#include "clk-pxa.h" + +#define KHz 1000 +#define MHz (1000 * 1000) + +enum { + PXA_CORE_60Mhz = 0, + PXA_CORE_RUN, + PXA_CORE_TURBO, +}; + +enum { + PXA_BUS_60Mhz = 0, + PXA_BUS_HSS, +}; + +/* crystal frequency to HSIO bus frequency multiplier (HSS) */ +static unsigned char hss_mult[4] = { 8, 12, 16, 24 }; + +/* crystal frequency to static memory controller multiplier (SMCFS) */ +static unsigned int smcfs_mult[8] = { 6, 0, 8, 0, 0, 16, }; +static unsigned int df_clkdiv[4] = { 1, 2, 4, 1 }; + +static const char * const get_freq_khz[] = { + "core", "ring_osc_60mhz", "run", "cpll", "system_bus" +}; + +/* + * Get the clock frequency as reflected by ACSR and the turbo flag. + * We assume these values have been applied via a fcs. + * If info is not 0 we also display the current settings. + */ +unsigned int pxa3xx_get_clk_frequency_khz(int info) +{ + struct clk *clk; + unsigned long clks[5]; + int i; + + for (i = 0; i < 5; i++) { + clk = clk_get(NULL, get_freq_khz[i]); + if (IS_ERR(clk)) { + clks[i] = 0; + } else { + clks[i] = clk_get_rate(clk); + clk_put(clk); + } + } + if (info) { + pr_info("RO Mode clock: %ld.%02ldMHz\n", + clks[1] / 1000000, (clks[0] % 1000000) / 10000); + pr_info("Run Mode clock: %ld.%02ldMHz\n", + clks[2] / 1000000, (clks[1] % 1000000) / 10000); + pr_info("Turbo Mode clock: %ld.%02ldMHz\n", + clks[3] / 1000000, (clks[2] % 1000000) / 10000); + pr_info("System bus clock: %ld.%02ldMHz\n", + clks[4] / 1000000, (clks[4] % 1000000) / 10000); + } + return (unsigned int)clks[0]; +} + +static unsigned long clk_pxa3xx_ac97_get_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + unsigned long ac97_div, rate; + + ac97_div = AC97_DIV; + + /* This may loose precision for some rates but won't for the + * standard 24.576MHz. + */ + rate = parent_rate / 2; + rate /= ((ac97_div >> 12) & 0x7fff); + rate *= (ac97_div & 0xfff); + + return rate; +} +PARENTS(clk_pxa3xx_ac97) = { "spll_624mhz" }; +RATE_RO_OPS(clk_pxa3xx_ac97, "ac97"); + +static unsigned long clk_pxa3xx_smemc_get_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + unsigned long acsr = ACSR; + unsigned long memclkcfg = __raw_readl(MEMCLKCFG); + + return (parent_rate / 48) * smcfs_mult[(acsr >> 23) & 0x7] / + df_clkdiv[(memclkcfg >> 16) & 0x3]; +} +PARENTS(clk_pxa3xx_smemc) = { "spll_624mhz" }; +RATE_RO_OPS(clk_pxa3xx_smemc, "smemc"); + +static bool pxa3xx_is_ring_osc_forced(void) +{ + unsigned long acsr = ACSR; + + return acsr & ACCR_D0CS; +} + +PARENTS(pxa3xx_pbus) = { "ring_osc_60mhz", "spll_624mhz" }; +PARENTS(pxa3xx_32Khz_bus) = { "osc_32_768khz", "osc_32_768khz" }; +PARENTS(pxa3xx_13MHz_bus) = { "osc_13mhz", "osc_13mhz" }; +PARENTS(pxa3xx_ac97_bus) = { "ring_osc_60mhz", "ac97" }; +PARENTS(pxa3xx_sbus) = { "ring_osc_60mhz", "system_bus" }; +PARENTS(pxa3xx_smemcbus) = { "ring_osc_60mhz", "smemc" }; + +#define CKEN_AB(bit) ((CKEN_ ## bit > 31) ? &CKENA : &CKENB) +#define PXA3XX_CKEN(dev_id, con_id, parents, mult_lp, div_lp, mult_hp, \ + div_hp, bit, is_lp, flags) \ + PXA_CKEN(dev_id, con_id, bit, parents, mult_lp, div_lp, \ + mult_hp, div_hp, is_lp, CKEN_AB(bit), \ + (CKEN_ ## bit % 32), flags) +#define PXA3XX_PBUS_CKEN(dev_id, con_id, bit, mult_lp, div_lp, \ + mult_hp, div_hp, delay) \ + PXA3XX_CKEN(dev_id, con_id, pxa3xx_pbus_parents, mult_lp, \ + div_lp, mult_hp, div_hp, bit, pxa3xx_is_ring_osc_forced, 0) +#define PXA3XX_CKEN_1RATE(dev_id, con_id, bit, parents) \ + PXA_CKEN_1RATE(dev_id, con_id, bit, parents, \ + CKEN_AB(bit), (CKEN_ ## bit % 32), 0) + +static struct desc_clk_cken pxa3xx_clocks[] __initdata = { + PXA3XX_PBUS_CKEN("pxa2xx-uart.0", NULL, FFUART, 1, 4, 1, 42, 1), + PXA3XX_PBUS_CKEN("pxa2xx-uart.1", NULL, BTUART, 1, 4, 1, 42, 1), + PXA3XX_PBUS_CKEN("pxa2xx-uart.2", NULL, STUART, 1, 4, 1, 42, 1), + PXA3XX_PBUS_CKEN("pxa2xx-i2c.0", NULL, I2C, 2, 5, 1, 19, 0), + PXA3XX_PBUS_CKEN("pxa27x-udc", NULL, UDC, 1, 4, 1, 13, 5), + PXA3XX_PBUS_CKEN("pxa27x-ohci", NULL, USBH, 1, 4, 1, 13, 0), + PXA3XX_PBUS_CKEN("pxa3xx-u2d", NULL, USB2, 1, 4, 1, 13, 0), + PXA3XX_PBUS_CKEN("pxa27x-pwm.0", NULL, PWM0, 1, 6, 1, 48, 0), + PXA3XX_PBUS_CKEN("pxa27x-pwm.1", NULL, PWM1, 1, 6, 1, 48, 0), + PXA3XX_PBUS_CKEN("pxa2xx-mci.0", NULL, MMC1, 1, 4, 1, 24, 0), + PXA3XX_PBUS_CKEN("pxa2xx-mci.1", NULL, MMC2, 1, 4, 1, 24, 0), + PXA3XX_PBUS_CKEN("pxa2xx-mci.2", NULL, MMC3, 1, 4, 1, 24, 0), + + PXA3XX_CKEN_1RATE("pxa27x-keypad", NULL, KEYPAD, + pxa3xx_32Khz_bus_parents), + PXA3XX_CKEN_1RATE("pxa3xx-ssp.0", NULL, SSP1, pxa3xx_13MHz_bus_parents), + PXA3XX_CKEN_1RATE("pxa3xx-ssp.1", NULL, SSP2, pxa3xx_13MHz_bus_parents), + PXA3XX_CKEN_1RATE("pxa3xx-ssp.2", NULL, SSP3, pxa3xx_13MHz_bus_parents), + PXA3XX_CKEN_1RATE("pxa3xx-ssp.3", NULL, SSP4, pxa3xx_13MHz_bus_parents), + + PXA3XX_CKEN(NULL, "AC97CLK", pxa3xx_ac97_bus_parents, 1, 4, 1, 1, AC97, + pxa3xx_is_ring_osc_forced, 0), + PXA3XX_CKEN(NULL, "CAMCLK", pxa3xx_sbus_parents, 1, 2, 1, 1, CAMERA, + pxa3xx_is_ring_osc_forced, 0), + PXA3XX_CKEN("pxa2xx-fb", NULL, pxa3xx_sbus_parents, 1, 1, 1, 1, LCD, + pxa3xx_is_ring_osc_forced, 0), + PXA3XX_CKEN("pxa2xx-pcmcia", NULL, pxa3xx_smemcbus_parents, 1, 4, + 1, 1, SMC, pxa3xx_is_ring_osc_forced, CLK_IGNORE_UNUSED), +}; + +static struct desc_clk_cken pxa300_310_clocks[] __initdata = { + + PXA3XX_PBUS_CKEN("pxa3xx-gcu", NULL, PXA300_GCU, 1, 1, 1, 1, 0), + PXA3XX_PBUS_CKEN("pxa3xx-nand", NULL, NAND, 1, 2, 1, 4, 0), + PXA3XX_CKEN_1RATE("pxa3xx-gpio", NULL, GPIO, pxa3xx_13MHz_bus_parents), +}; + +static struct desc_clk_cken pxa320_clocks[] __initdata = { + PXA3XX_PBUS_CKEN("pxa3xx-nand", NULL, NAND, 1, 2, 1, 6, 0), + PXA3XX_PBUS_CKEN("pxa3xx-gcu", NULL, PXA320_GCU, 1, 1, 1, 1, 0), + PXA3XX_CKEN_1RATE("pxa3xx-gpio", NULL, GPIO, pxa3xx_13MHz_bus_parents), +}; + +static struct desc_clk_cken pxa93x_clocks[] __initdata = { + + PXA3XX_PBUS_CKEN("pxa3xx-gcu", NULL, PXA300_GCU, 1, 1, 1, 1, 0), + PXA3XX_PBUS_CKEN("pxa3xx-nand", NULL, NAND, 1, 2, 1, 4, 0), + PXA3XX_CKEN_1RATE("pxa93x-gpio", NULL, GPIO, pxa3xx_13MHz_bus_parents), +}; + +static unsigned long clk_pxa3xx_system_bus_get_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + unsigned long acsr = ACSR; + unsigned int hss = (acsr >> 14) & 0x3; + + if (pxa3xx_is_ring_osc_forced()) + return parent_rate; + return parent_rate / 48 * hss_mult[hss]; +} + +static u8 clk_pxa3xx_system_bus_get_parent(struct clk_hw *hw) +{ + if (pxa3xx_is_ring_osc_forced()) + return PXA_BUS_60Mhz; + else + return PXA_BUS_HSS; +} + +PARENTS(clk_pxa3xx_system_bus) = { "ring_osc_60mhz", "spll_624mhz" }; +MUX_RO_RATE_RO_OPS(clk_pxa3xx_system_bus, "system_bus"); + +static unsigned long clk_pxa3xx_core_get_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + return parent_rate; +} + +static u8 clk_pxa3xx_core_get_parent(struct clk_hw *hw) +{ + unsigned long xclkcfg; + unsigned int t; + + if (pxa3xx_is_ring_osc_forced()) + return PXA_CORE_60Mhz; + + /* Read XCLKCFG register turbo bit */ + __asm__ __volatile__("mrc\tp14, 0, %0, c6, c0, 0" : "=r"(xclkcfg)); + t = xclkcfg & 0x1; + + if (t) + return PXA_CORE_TURBO; + return PXA_CORE_RUN; +} +PARENTS(clk_pxa3xx_core) = { "ring_osc_60mhz", "run", "cpll" }; +MUX_RO_RATE_RO_OPS(clk_pxa3xx_core, "core"); + +static unsigned long clk_pxa3xx_run_get_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + unsigned long acsr = ACSR; + unsigned int xn = (acsr & ACCR_XN_MASK) >> 8; + unsigned int t, xclkcfg; + + /* Read XCLKCFG register turbo bit */ + __asm__ __volatile__("mrc\tp14, 0, %0, c6, c0, 0" : "=r"(xclkcfg)); + t = xclkcfg & 0x1; + + return t ? (parent_rate / xn) * 2 : parent_rate; +} +PARENTS(clk_pxa3xx_run) = { "cpll" }; +RATE_RO_OPS(clk_pxa3xx_run, "run"); + +static unsigned long clk_pxa3xx_cpll_get_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + unsigned long acsr = ACSR; + unsigned int xn = (acsr & ACCR_XN_MASK) >> 8; + unsigned int xl = acsr & ACCR_XL_MASK; + unsigned int t, xclkcfg; + + /* Read XCLKCFG register turbo bit */ + __asm__ __volatile__("mrc\tp14, 0, %0, c6, c0, 0" : "=r"(xclkcfg)); + t = xclkcfg & 0x1; + + pr_info("RJK: parent_rate=%lu, xl=%u, xn=%u\n", parent_rate, xl, xn); + return t ? parent_rate * xl * xn : parent_rate * xl; +} +PARENTS(clk_pxa3xx_cpll) = { "osc_13mhz" }; +RATE_RO_OPS(clk_pxa3xx_cpll, "cpll"); + +static void __init pxa3xx_register_core(void) +{ + clk_register_clk_pxa3xx_cpll(); + clk_register_clk_pxa3xx_run(); + + clkdev_pxa_register(CLK_CORE, "core", NULL, + clk_register_clk_pxa3xx_core()); +} + +static void __init pxa3xx_register_plls(void) +{ + clk_register_fixed_rate(NULL, "osc_13mhz", NULL, + CLK_GET_RATE_NOCACHE | CLK_IS_ROOT, + 13 * MHz); + clk_register_fixed_rate(NULL, "osc_32_768khz", NULL, + CLK_GET_RATE_NOCACHE | CLK_IS_ROOT, + 32768); + clk_register_fixed_rate(NULL, "ring_osc_120mhz", NULL, + CLK_GET_RATE_NOCACHE | CLK_IS_ROOT, + 120 * MHz); + clk_register_fixed_rate(NULL, "clk_dummy", NULL, CLK_IS_ROOT, 0); + clk_register_fixed_factor(NULL, "spll_624mhz", "osc_13mhz", 0, 48, 1); + clk_register_fixed_factor(NULL, "ring_osc_60mhz", "ring_osc_120mhz", + 0, 1, 2); +} + +#define DUMMY_CLK(_con_id, _dev_id, _parent) \ + { .con_id = _con_id, .dev_id = _dev_id, .parent = _parent } +struct dummy_clk { + const char *con_id; + const char *dev_id; + const char *parent; +}; +static struct dummy_clk dummy_clks[] __initdata = { + DUMMY_CLK(NULL, "pxa93x-gpio", "osc_13mhz"), + DUMMY_CLK(NULL, "sa1100-rtc", "osc_32_768khz"), + DUMMY_CLK("UARTCLK", "pxa2xx-ir", "STUART"), + DUMMY_CLK(NULL, "pxa3xx-pwri2c.1", "osc_13mhz"), +}; + +static void __init pxa3xx_dummy_clocks_init(void) +{ + struct clk *clk; + struct dummy_clk *d; + const char *name; + int i; + + for (i = 0; i < ARRAY_SIZE(dummy_clks); i++) { + d = &dummy_clks[i]; + name = d->dev_id ? d->dev_id : d->con_id; + clk = clk_register_fixed_factor(NULL, name, d->parent, 0, 1, 1); + clk_register_clkdev(clk, d->con_id, d->dev_id); + } +} + +static void __init pxa3xx_base_clocks_init(void) +{ + pxa3xx_register_plls(); + pxa3xx_register_core(); + clk_register_clk_pxa3xx_system_bus(); + clk_register_clk_pxa3xx_ac97(); + clk_register_clk_pxa3xx_smemc(); + clk_register_gate(NULL, "CLK_POUT", "osc_13mhz", 0, + (void __iomem *)&OSCC, 11, 0, NULL); + clkdev_pxa_register(CLK_OSTIMER, "OSTIMER0", NULL, + clk_register_fixed_factor(NULL, "os-timer0", + "osc_13mhz", 0, 1, 4)); +} + +int __init pxa3xx_clocks_init(void) +{ + int ret; + + pxa3xx_base_clocks_init(); + pxa3xx_dummy_clocks_init(); + ret = clk_pxa_cken_init(pxa3xx_clocks, ARRAY_SIZE(pxa3xx_clocks)); + if (ret) + return ret; + if (cpu_is_pxa320()) + return clk_pxa_cken_init(pxa320_clocks, + ARRAY_SIZE(pxa320_clocks)); + if (cpu_is_pxa300() || cpu_is_pxa310()) + return clk_pxa_cken_init(pxa300_310_clocks, + ARRAY_SIZE(pxa300_310_clocks)); + return clk_pxa_cken_init(pxa93x_clocks, ARRAY_SIZE(pxa93x_clocks)); +} + +static void __init pxa3xx_dt_clocks_init(struct device_node *np) +{ + pxa3xx_clocks_init(); + clk_pxa_dt_common_init(np); +} +CLK_OF_DECLARE(pxa_clks, "marvell,pxa300-clocks", pxa3xx_dt_clocks_init); |