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authorOlof Johansson <olof@lixom.net>2012-09-12 23:03:37 -0700
committerOlof Johansson <olof@lixom.net>2012-09-12 23:03:37 -0700
commit77ea4a300dc585e84062f45157d43897c9132c22 (patch)
tree3a6e19250b837be65477060870c33443a861dc1e /arch/arm/mach-prima2
parent839a8d77c9a5e617bd07eff7c2d5fdf92aa3a5b2 (diff)
parent494bfec99922d54054d2d0873f1017680cfc3f13 (diff)
Merge branch 'clk-3.7' of git://git.linaro.org/people/mturquette/linux into next/dt
* 'clk-3.7' of git://git.linaro.org/people/mturquette/linux: clk: add of_clk_src_onecell_get() support clk: ux500: Define smp_twd clock for u8500 mfd: dbx500: Provide a more accurate smp_twd clock clk: ux500: Support for prmcu_rate clock clk: Provide option for clk_get_rate to issue hw for new rate clock: max77686: Add driver for Maxim 77686 32Khz crystal oscillator. ARM: ux500: Switch to use common clock framework clk: ux500: Clock definitions for u8500 clk: ux500: First version of clock definitions for ux500 clk: ux500: Adapt PRCMU and PRCC clocks for common clk clk: versatile: make config option boolean clk: add Loongson1B clock support arm: mmp: make all SOCs use common clock by default clk: mmp: add clock definition for mmp2 clk: mmp: add clock definition for pxa910 clk: mmp: add clock definition for pxa168 clk: mmp: add mmp specific clocks clk: convert ARM RealView to common clk clk: prima2: move from arch/arm/mach to drivers/clk ARM: PRIMA2: convert to common clk and finish full clk tree
Diffstat (limited to 'arch/arm/mach-prima2')
-rw-r--r--arch/arm/mach-prima2/Makefile1
-rw-r--r--arch/arm/mach-prima2/clock.c510
-rw-r--r--arch/arm/mach-prima2/prima2.c1
-rw-r--r--arch/arm/mach-prima2/timer.c8
4 files changed, 7 insertions, 513 deletions
diff --git a/arch/arm/mach-prima2/Makefile b/arch/arm/mach-prima2/Makefile
index 13dd1604d951..841847d56032 100644
--- a/arch/arm/mach-prima2/Makefile
+++ b/arch/arm/mach-prima2/Makefile
@@ -1,6 +1,5 @@
obj-y := timer.o
obj-y += irq.o
-obj-y += clock.o
obj-y += rstc.o
obj-y += prima2.o
obj-y += rtciobrg.o
diff --git a/arch/arm/mach-prima2/clock.c b/arch/arm/mach-prima2/clock.c
deleted file mode 100644
index aebad7e565cf..000000000000
--- a/arch/arm/mach-prima2/clock.c
+++ /dev/null
@@ -1,510 +0,0 @@
-/*
- * Clock tree for CSR SiRFprimaII
- *
- * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
- *
- * Licensed under GPLv2 or later.
- */
-
-#include <linux/module.h>
-#include <linux/bitops.h>
-#include <linux/err.h>
-#include <linux/errno.h>
-#include <linux/io.h>
-#include <linux/clkdev.h>
-#include <linux/clk.h>
-#include <linux/spinlock.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <asm/mach/map.h>
-#include <mach/map.h>
-
-#define SIRFSOC_CLKC_CLK_EN0 0x0000
-#define SIRFSOC_CLKC_CLK_EN1 0x0004
-#define SIRFSOC_CLKC_REF_CFG 0x0014
-#define SIRFSOC_CLKC_CPU_CFG 0x0018
-#define SIRFSOC_CLKC_MEM_CFG 0x001c
-#define SIRFSOC_CLKC_SYS_CFG 0x0020
-#define SIRFSOC_CLKC_IO_CFG 0x0024
-#define SIRFSOC_CLKC_DSP_CFG 0x0028
-#define SIRFSOC_CLKC_GFX_CFG 0x002c
-#define SIRFSOC_CLKC_MM_CFG 0x0030
-#define SIRFSOC_LKC_LCD_CFG 0x0034
-#define SIRFSOC_CLKC_MMC_CFG 0x0038
-#define SIRFSOC_CLKC_PLL1_CFG0 0x0040
-#define SIRFSOC_CLKC_PLL2_CFG0 0x0044
-#define SIRFSOC_CLKC_PLL3_CFG0 0x0048
-#define SIRFSOC_CLKC_PLL1_CFG1 0x004c
-#define SIRFSOC_CLKC_PLL2_CFG1 0x0050
-#define SIRFSOC_CLKC_PLL3_CFG1 0x0054
-#define SIRFSOC_CLKC_PLL1_CFG2 0x0058
-#define SIRFSOC_CLKC_PLL2_CFG2 0x005c
-#define SIRFSOC_CLKC_PLL3_CFG2 0x0060
-
-#define SIRFSOC_CLOCK_VA_BASE SIRFSOC_VA(0x005000)
-
-#define KHZ 1000
-#define MHZ (KHZ * KHZ)
-
-struct clk_ops {
- unsigned long (*get_rate)(struct clk *clk);
- long (*round_rate)(struct clk *clk, unsigned long rate);
- int (*set_rate)(struct clk *clk, unsigned long rate);
- int (*enable)(struct clk *clk);
- int (*disable)(struct clk *clk);
- struct clk *(*get_parent)(struct clk *clk);
- int (*set_parent)(struct clk *clk, struct clk *parent);
-};
-
-struct clk {
- struct clk *parent; /* parent clk */
- unsigned long rate; /* clock rate in Hz */
- signed char usage; /* clock enable count */
- signed char enable_bit; /* enable bit: 0 ~ 63 */
- unsigned short regofs; /* register offset */
- struct clk_ops *ops; /* clock operation */
-};
-
-static DEFINE_SPINLOCK(clocks_lock);
-
-static inline unsigned long clkc_readl(unsigned reg)
-{
- return readl(SIRFSOC_CLOCK_VA_BASE + reg);
-}
-
-static inline void clkc_writel(u32 val, unsigned reg)
-{
- writel(val, SIRFSOC_CLOCK_VA_BASE + reg);
-}
-
-/*
- * osc_rtc - real time oscillator - 32.768KHz
- * osc_sys - high speed oscillator - 26MHz
- */
-
-static struct clk clk_rtc = {
- .rate = 32768,
-};
-
-static struct clk clk_osc = {
- .rate = 26 * MHZ,
-};
-
-/*
- * std pll
- */
-static unsigned long std_pll_get_rate(struct clk *clk)
-{
- unsigned long fin = clk_get_rate(clk->parent);
- u32 regcfg2 = clk->regofs + SIRFSOC_CLKC_PLL1_CFG2 -
- SIRFSOC_CLKC_PLL1_CFG0;
-
- if (clkc_readl(regcfg2) & BIT(2)) {
- /* pll bypass mode */
- clk->rate = fin;
- } else {
- /* fout = fin * nf / nr / od */
- u32 cfg0 = clkc_readl(clk->regofs);
- u32 nf = (cfg0 & (BIT(13) - 1)) + 1;
- u32 nr = ((cfg0 >> 13) & (BIT(6) - 1)) + 1;
- u32 od = ((cfg0 >> 19) & (BIT(4) - 1)) + 1;
- WARN_ON(fin % MHZ);
- clk->rate = fin / MHZ * nf / nr / od * MHZ;
- }
-
- return clk->rate;
-}
-
-static int std_pll_set_rate(struct clk *clk, unsigned long rate)
-{
- unsigned long fin, nf, nr, od, reg;
-
- /*
- * fout = fin * nf / (nr * od);
- * set od = 1, nr = fin/MHz, so fout = nf * MHz
- */
-
- nf = rate / MHZ;
- if (unlikely((rate % MHZ) || nf > BIT(13) || nf < 1))
- return -EINVAL;
-
- fin = clk_get_rate(clk->parent);
- BUG_ON(fin < MHZ);
-
- nr = fin / MHZ;
- BUG_ON((fin % MHZ) || nr > BIT(6));
-
- od = 1;
-
- reg = (nf - 1) | ((nr - 1) << 13) | ((od - 1) << 19);
- clkc_writel(reg, clk->regofs);
-
- reg = clk->regofs + SIRFSOC_CLKC_PLL1_CFG1 - SIRFSOC_CLKC_PLL1_CFG0;
- clkc_writel((nf >> 1) - 1, reg);
-
- reg = clk->regofs + SIRFSOC_CLKC_PLL1_CFG2 - SIRFSOC_CLKC_PLL1_CFG0;
- while (!(clkc_readl(reg) & BIT(6)))
- cpu_relax();
-
- clk->rate = 0; /* set to zero will force recalculation */
- return 0;
-}
-
-static struct clk_ops std_pll_ops = {
- .get_rate = std_pll_get_rate,
- .set_rate = std_pll_set_rate,
-};
-
-static struct clk clk_pll1 = {
- .parent = &clk_osc,
- .regofs = SIRFSOC_CLKC_PLL1_CFG0,
- .ops = &std_pll_ops,
-};
-
-static struct clk clk_pll2 = {
- .parent = &clk_osc,
- .regofs = SIRFSOC_CLKC_PLL2_CFG0,
- .ops = &std_pll_ops,
-};
-
-static struct clk clk_pll3 = {
- .parent = &clk_osc,
- .regofs = SIRFSOC_CLKC_PLL3_CFG0,
- .ops = &std_pll_ops,
-};
-
-/*
- * clock domains - cpu, mem, sys/io
- */
-
-static struct clk clk_mem;
-
-static struct clk *dmn_get_parent(struct clk *clk)
-{
- struct clk *clks[] = {
- &clk_osc, &clk_rtc, &clk_pll1, &clk_pll2, &clk_pll3
- };
- u32 cfg = clkc_readl(clk->regofs);
- WARN_ON((cfg & (BIT(3) - 1)) > 4);
- return clks[cfg & (BIT(3) - 1)];
-}
-
-static int dmn_set_parent(struct clk *clk, struct clk *parent)
-{
- const struct clk *clks[] = {
- &clk_osc, &clk_rtc, &clk_pll1, &clk_pll2, &clk_pll3
- };
- u32 cfg = clkc_readl(clk->regofs);
- int i;
- for (i = 0; i < ARRAY_SIZE(clks); i++) {
- if (clks[i] == parent) {
- cfg &= ~(BIT(3) - 1);
- clkc_writel(cfg | i, clk->regofs);
- /* BIT(3) - switching status: 1 - busy, 0 - done */
- while (clkc_readl(clk->regofs) & BIT(3))
- cpu_relax();
- return 0;
- }
- }
- return -EINVAL;
-}
-
-static unsigned long dmn_get_rate(struct clk *clk)
-{
- unsigned long fin = clk_get_rate(clk->parent);
- u32 cfg = clkc_readl(clk->regofs);
- if (cfg & BIT(24)) {
- /* fcd bypass mode */
- clk->rate = fin;
- } else {
- /*
- * wait count: bit[19:16], hold count: bit[23:20]
- */
- u32 wait = (cfg >> 16) & (BIT(4) - 1);
- u32 hold = (cfg >> 20) & (BIT(4) - 1);
-
- clk->rate = fin / (wait + hold + 2);
- }
-
- return clk->rate;
-}
-
-static int dmn_set_rate(struct clk *clk, unsigned long rate)
-{
- unsigned long fin;
- unsigned ratio, wait, hold, reg;
- unsigned bits = (clk == &clk_mem) ? 3 : 4;
-
- fin = clk_get_rate(clk->parent);
- ratio = fin / rate;
-
- if (unlikely(ratio < 2 || ratio > BIT(bits + 1)))
- return -EINVAL;
-
- WARN_ON(fin % rate);
-
- wait = (ratio >> 1) - 1;
- hold = ratio - wait - 2;
-
- reg = clkc_readl(clk->regofs);
- reg &= ~(((BIT(bits) - 1) << 16) | ((BIT(bits) - 1) << 20));
- reg |= (wait << 16) | (hold << 20) | BIT(25);
- clkc_writel(reg, clk->regofs);
-
- /* waiting FCD been effective */
- while (clkc_readl(clk->regofs) & BIT(25))
- cpu_relax();
-
- clk->rate = 0; /* set to zero will force recalculation */
-
- return 0;
-}
-
-/*
- * cpu clock has no FCD register in Prima2, can only change pll
- */
-static int cpu_set_rate(struct clk *clk, unsigned long rate)
-{
- int ret1, ret2;
- struct clk *cur_parent, *tmp_parent;
-
- cur_parent = dmn_get_parent(clk);
- BUG_ON(cur_parent == NULL || cur_parent->usage > 1);
-
- /* switch to tmp pll before setting parent clock's rate */
- tmp_parent = cur_parent == &clk_pll1 ? &clk_pll2 : &clk_pll1;
- ret1 = dmn_set_parent(clk, tmp_parent);
- BUG_ON(ret1);
-
- ret2 = clk_set_rate(cur_parent, rate);
-
- ret1 = dmn_set_parent(clk, cur_parent);
-
- clk->rate = 0; /* set to zero will force recalculation */
-
- return ret2 ? ret2 : ret1;
-}
-
-static struct clk_ops cpu_ops = {
- .get_parent = dmn_get_parent,
- .set_parent = dmn_set_parent,
- .set_rate = cpu_set_rate,
-};
-
-static struct clk clk_cpu = {
- .parent = &clk_pll1,
- .regofs = SIRFSOC_CLKC_CPU_CFG,
- .ops = &cpu_ops,
-};
-
-
-static struct clk_ops msi_ops = {
- .set_rate = dmn_set_rate,
- .get_rate = dmn_get_rate,
- .set_parent = dmn_set_parent,
- .get_parent = dmn_get_parent,
-};
-
-static struct clk clk_mem = {
- .parent = &clk_pll2,
- .regofs = SIRFSOC_CLKC_MEM_CFG,
- .ops = &msi_ops,
-};
-
-static struct clk clk_sys = {
- .parent = &clk_pll3,
- .regofs = SIRFSOC_CLKC_SYS_CFG,
- .ops = &msi_ops,
-};
-
-static struct clk clk_io = {
- .parent = &clk_pll3,
- .regofs = SIRFSOC_CLKC_IO_CFG,
- .ops = &msi_ops,
-};
-
-/*
- * on-chip clock sets
- */
-static struct clk_lookup onchip_clks[] = {
- {
- .dev_id = "rtc",
- .clk = &clk_rtc,
- }, {
- .dev_id = "osc",
- .clk = &clk_osc,
- }, {
- .dev_id = "pll1",
- .clk = &clk_pll1,
- }, {
- .dev_id = "pll2",
- .clk = &clk_pll2,
- }, {
- .dev_id = "pll3",
- .clk = &clk_pll3,
- }, {
- .dev_id = "cpu",
- .clk = &clk_cpu,
- }, {
- .dev_id = "mem",
- .clk = &clk_mem,
- }, {
- .dev_id = "sys",
- .clk = &clk_sys,
- }, {
- .dev_id = "io",
- .clk = &clk_io,
- },
-};
-
-int clk_enable(struct clk *clk)
-{
- unsigned long flags;
-
- if (unlikely(IS_ERR_OR_NULL(clk)))
- return -EINVAL;
-
- if (clk->parent)
- clk_enable(clk->parent);
-
- spin_lock_irqsave(&clocks_lock, flags);
- if (!clk->usage++ && clk->ops && clk->ops->enable)
- clk->ops->enable(clk);
- spin_unlock_irqrestore(&clocks_lock, flags);
- return 0;
-}
-EXPORT_SYMBOL(clk_enable);
-
-void clk_disable(struct clk *clk)
-{
- unsigned long flags;
-
- if (unlikely(IS_ERR_OR_NULL(clk)))
- return;
-
- WARN_ON(!clk->usage);
-
- spin_lock_irqsave(&clocks_lock, flags);
- if (--clk->usage == 0 && clk->ops && clk->ops->disable)
- clk->ops->disable(clk);
- spin_unlock_irqrestore(&clocks_lock, flags);
-
- if (clk->parent)
- clk_disable(clk->parent);
-}
-EXPORT_SYMBOL(clk_disable);
-
-unsigned long clk_get_rate(struct clk *clk)
-{
- if (unlikely(IS_ERR_OR_NULL(clk)))
- return 0;
-
- if (clk->rate)
- return clk->rate;
-
- if (clk->ops && clk->ops->get_rate)
- return clk->ops->get_rate(clk);
-
- return clk_get_rate(clk->parent);
-}
-EXPORT_SYMBOL(clk_get_rate);
-
-long clk_round_rate(struct clk *clk, unsigned long rate)
-{
- if (unlikely(IS_ERR_OR_NULL(clk)))
- return 0;
-
- if (clk->ops && clk->ops->round_rate)
- return clk->ops->round_rate(clk, rate);
-
- return 0;
-}
-EXPORT_SYMBOL(clk_round_rate);
-
-int clk_set_rate(struct clk *clk, unsigned long rate)
-{
- if (unlikely(IS_ERR_OR_NULL(clk)))
- return -EINVAL;
-
- if (!clk->ops || !clk->ops->set_rate)
- return -EINVAL;
-
- return clk->ops->set_rate(clk, rate);
-}
-EXPORT_SYMBOL(clk_set_rate);
-
-int clk_set_parent(struct clk *clk, struct clk *parent)
-{
- int ret;
- unsigned long flags;
-
- if (unlikely(IS_ERR_OR_NULL(clk)))
- return -EINVAL;
-
- if (!clk->ops || !clk->ops->set_parent)
- return -EINVAL;
-
- spin_lock_irqsave(&clocks_lock, flags);
- ret = clk->ops->set_parent(clk, parent);
- if (!ret) {
- parent->usage += clk->usage;
- clk->parent->usage -= clk->usage;
- BUG_ON(clk->parent->usage < 0);
- clk->parent = parent;
- }
- spin_unlock_irqrestore(&clocks_lock, flags);
- return ret;
-}
-EXPORT_SYMBOL(clk_set_parent);
-
-struct clk *clk_get_parent(struct clk *clk)
-{
- unsigned long flags;
-
- if (unlikely(IS_ERR_OR_NULL(clk)))
- return NULL;
-
- if (!clk->ops || !clk->ops->get_parent)
- return clk->parent;
-
- spin_lock_irqsave(&clocks_lock, flags);
- clk->parent = clk->ops->get_parent(clk);
- spin_unlock_irqrestore(&clocks_lock, flags);
- return clk->parent;
-}
-EXPORT_SYMBOL(clk_get_parent);
-
-static void __init sirfsoc_clk_init(void)
-{
- clkdev_add_table(onchip_clks, ARRAY_SIZE(onchip_clks));
-}
-
-static struct of_device_id clkc_ids[] = {
- { .compatible = "sirf,prima2-clkc" },
- {},
-};
-
-void __init sirfsoc_of_clk_init(void)
-{
- struct device_node *np;
- struct resource res;
- struct map_desc sirfsoc_clkc_iodesc = {
- .virtual = SIRFSOC_CLOCK_VA_BASE,
- .type = MT_DEVICE,
- };
-
- np = of_find_matching_node(NULL, clkc_ids);
- if (!np)
- panic("unable to find compatible clkc node in dtb\n");
-
- if (of_address_to_resource(np, 0, &res))
- panic("unable to find clkc range in dtb");
- of_node_put(np);
-
- sirfsoc_clkc_iodesc.pfn = __phys_to_pfn(res.start);
- sirfsoc_clkc_iodesc.length = 1 + res.end - res.start;
-
- iotable_init(&sirfsoc_clkc_iodesc, 1);
-
- sirfsoc_clk_init();
-}
diff --git a/arch/arm/mach-prima2/prima2.c b/arch/arm/mach-prima2/prima2.c
index 8f0429d4b79f..e9a17aebe0d6 100644
--- a/arch/arm/mach-prima2/prima2.c
+++ b/arch/arm/mach-prima2/prima2.c
@@ -38,7 +38,6 @@ static const char *prima2cb_dt_match[] __initdata = {
MACHINE_START(PRIMA2_EVB, "prima2cb")
/* Maintainer: Barry Song <baohua.song@csr.com> */
.atag_offset = 0x100,
- .init_early = sirfsoc_of_clk_init,
.map_io = sirfsoc_map_lluart,
.init_irq = sirfsoc_of_irq_init,
.timer = &sirfsoc_timer,
diff --git a/arch/arm/mach-prima2/timer.c b/arch/arm/mach-prima2/timer.c
index f224107de7bc..d95bf252f694 100644
--- a/arch/arm/mach-prima2/timer.c
+++ b/arch/arm/mach-prima2/timer.c
@@ -21,6 +21,8 @@
#include <asm/sched_clock.h>
#include <asm/mach/time.h>
+#include "common.h"
+
#define SIRFSOC_TIMER_COUNTER_LO 0x0000
#define SIRFSOC_TIMER_COUNTER_HI 0x0004
#define SIRFSOC_TIMER_MATCH_0 0x0008
@@ -188,9 +190,13 @@ static void __init sirfsoc_clockevent_init(void)
static void __init sirfsoc_timer_init(void)
{
unsigned long rate;
+ struct clk *clk;
+
+ /* initialize clocking early, we want to set the OS timer */
+ sirfsoc_of_clk_init();
/* timer's input clock is io clock */
- struct clk *clk = clk_get_sys("io", NULL);
+ clk = clk_get_sys("io", NULL);
BUG_ON(IS_ERR(clk));