diff options
Diffstat (limited to 'arch/arm/mach-pxa')
| -rw-r--r-- | arch/arm/mach-pxa/clock.c | 79 | ||||
| -rw-r--r-- | arch/arm/mach-pxa/clock.h | 43 | ||||
| -rw-r--r-- | arch/arm/mach-pxa/pxa25x.c | 38 | ||||
| -rw-r--r-- | arch/arm/mach-pxa/pxa27x.c | 45 |
4 files changed, 176 insertions, 29 deletions
diff --git a/arch/arm/mach-pxa/clock.c b/arch/arm/mach-pxa/clock.c index 34a31caa6f9..83ef5ecaf43 100644 --- a/arch/arm/mach-pxa/clock.c +++ b/arch/arm/mach-pxa/clock.c @@ -9,19 +9,15 @@ #include <linux/string.h> #include <linux/clk.h> #include <linux/spinlock.h> +#include <linux/platform_device.h> +#include <linux/delay.h> #include <asm/arch/pxa-regs.h> #include <asm/hardware.h> -struct clk { - struct list_head node; - unsigned long rate; - struct module *owner; - const char *name; - unsigned int enabled; - void (*enable)(void); - void (*disable)(void); -}; +#include "devices.h" +#include "generic.h" +#include "clock.h" static LIST_HEAD(clocks); static DEFINE_MUTEX(clocks_mutex); @@ -33,7 +29,8 @@ struct clk *clk_get(struct device *dev, const char *id) mutex_lock(&clocks_mutex); list_for_each_entry(p, &clocks, node) { - if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) { + if (strcmp(id, p->name) == 0 && + (p->dev == NULL || p->dev == dev)) { clk = p; break; } @@ -46,7 +43,6 @@ EXPORT_SYMBOL(clk_get); void clk_put(struct clk *clk) { - module_put(clk->owner); } EXPORT_SYMBOL(clk_put); @@ -56,8 +52,12 @@ int clk_enable(struct clk *clk) spin_lock_irqsave(&clocks_lock, flags); if (clk->enabled++ == 0) - clk->enable(); + clk->ops->enable(clk); spin_unlock_irqrestore(&clocks_lock, flags); + + if (clk->delay) + udelay(clk->delay); + return 0; } EXPORT_SYMBOL(clk_enable); @@ -70,54 +70,75 @@ void clk_disable(struct clk *clk) spin_lock_irqsave(&clocks_lock, flags); if (--clk->enabled == 0) - clk->disable(); + clk->ops->disable(clk); spin_unlock_irqrestore(&clocks_lock, flags); } EXPORT_SYMBOL(clk_disable); unsigned long clk_get_rate(struct clk *clk) { - return clk->rate; + unsigned long rate; + + rate = clk->rate; + if (clk->ops->getrate) + rate = clk->ops->getrate(clk); + + return rate; } EXPORT_SYMBOL(clk_get_rate); -static void clk_gpio27_enable(void) +static void clk_gpio27_enable(struct clk *clk) { pxa_gpio_mode(GPIO11_3_6MHz_MD); } -static void clk_gpio27_disable(void) +static void clk_gpio27_disable(struct clk *clk) { } -static struct clk clk_gpio27 = { - .name = "GPIO27_CLK", - .rate = 3686400, +static const struct clkops clk_gpio27_ops = { .enable = clk_gpio27_enable, .disable = clk_gpio27_disable, }; -int clk_register(struct clk *clk) + +void clk_cken_enable(struct clk *clk) { - mutex_lock(&clocks_mutex); - list_add(&clk->node, &clocks); - mutex_unlock(&clocks_mutex); - return 0; + CKEN |= 1 << clk->cken; } -EXPORT_SYMBOL(clk_register); -void clk_unregister(struct clk *clk) +void clk_cken_disable(struct clk *clk) { + CKEN &= ~(1 << clk->cken); +} + +const struct clkops clk_cken_ops = { + .enable = clk_cken_enable, + .disable = clk_cken_disable, +}; + +static struct clk common_clks[] = { + { + .name = "GPIO27_CLK", + .ops = &clk_gpio27_ops, + .rate = 3686400, + }, +}; + +void clks_register(struct clk *clks, size_t num) +{ + int i; + mutex_lock(&clocks_mutex); - list_del(&clk->node); + for (i = 0; i < num; i++) + list_add(&clks[i].node, &clocks); mutex_unlock(&clocks_mutex); } -EXPORT_SYMBOL(clk_unregister); static int __init clk_init(void) { - clk_register(&clk_gpio27); + clks_register(common_clks, ARRAY_SIZE(common_clks)); return 0; } arch_initcall(clk_init); diff --git a/arch/arm/mach-pxa/clock.h b/arch/arm/mach-pxa/clock.h new file mode 100644 index 00000000000..bc6b77e1592 --- /dev/null +++ b/arch/arm/mach-pxa/clock.h @@ -0,0 +1,43 @@ +struct clk; + +struct clkops { + void (*enable)(struct clk *); + void (*disable)(struct clk *); + unsigned long (*getrate)(struct clk *); +}; + +struct clk { + struct list_head node; + const char *name; + struct device *dev; + const struct clkops *ops; + unsigned long rate; + unsigned int cken; + unsigned int delay; + unsigned int enabled; +}; + +#define INIT_CKEN(_name, _cken, _rate, _delay, _dev) \ + { \ + .name = _name, \ + .dev = _dev, \ + .ops = &clk_cken_ops, \ + .rate = _rate, \ + .cken = CKEN_##_cken, \ + .delay = _delay, \ + } + +#define INIT_CK(_name, _cken, _ops, _dev) \ + { \ + .name = _name, \ + .dev = _dev, \ + .ops = _ops, \ + .cken = CKEN_##_cken, \ + } + +extern const struct clkops clk_cken_ops; + +void clk_cken_enable(struct clk *clk); +void clk_cken_disable(struct clk *clk); + +void clks_register(struct clk *clks, size_t num); diff --git a/arch/arm/mach-pxa/pxa25x.c b/arch/arm/mach-pxa/pxa25x.c index bcf3f0a7846..62a770121bf 100644 --- a/arch/arm/mach-pxa/pxa25x.c +++ b/arch/arm/mach-pxa/pxa25x.c @@ -30,6 +30,7 @@ #include "generic.h" #include "devices.h" +#include "clock.h" /* * Various clock factors driven by the CCCR register. @@ -94,6 +95,41 @@ unsigned int pxa25x_get_memclk_frequency_10khz(void) return L_clk_mult[(CCCR >> 0) & 0x1f] * BASE_CLK / 10000; } +static unsigned long clk_pxa25x_lcd_getrate(struct clk *clk) +{ + return pxa25x_get_memclk_frequency_10khz() * 10000; +} + +static const struct clkops clk_pxa25x_lcd_ops = { + .enable = clk_cken_enable, + .disable = clk_cken_disable, + .getrate = clk_pxa25x_lcd_getrate, +}; + +/* + * 3.6864MHz -> OST, GPIO, SSP, PWM, PLLs (95.842MHz, 147.456MHz) + * 95.842MHz -> MMC 19.169MHz, I2C 31.949MHz, FICP 47.923MHz, USB 47.923MHz + * 147.456MHz -> UART 14.7456MHz, AC97 12.288MHz, I2S 5.672MHz (allegedly) + */ +static struct clk pxa25x_clks[] = { + INIT_CK("LCDCLK", LCD, &clk_pxa25x_lcd_ops, &pxa_device_fb.dev), + INIT_CKEN("UARTCLK", FFUART, 14745600, 1, &pxa_device_ffuart.dev), + INIT_CKEN("UARTCLK", BTUART, 14745600, 1, &pxa_device_btuart.dev), + INIT_CKEN("UARTCLK", STUART, 14745600, 1, &pxa_device_stuart.dev), + INIT_CKEN("UARTCLK", BTUART, 14745600, 1, &pxa_device_btuart.dev), + INIT_CKEN("UDCCLK", USB, 47923000, 5, &pxa_device_udc.dev), + INIT_CKEN("MMCCLK", MMC, 19169000, 0, &pxa_device_mci.dev), + INIT_CKEN("I2CCLK", I2C, 31949000, 0, &pxa_device_i2c.dev), + /* + INIT_CKEN("PWMCLK", PWM0, 3686400, 0, NULL), + INIT_CKEN("PWMCLK", PWM0, 3686400, 0, NULL), + INIT_CKEN("SSPCLK", SSP, 3686400, 0, NULL), + INIT_CKEN("I2SCLK", I2S, 14745600, 0, NULL), + INIT_CKEN("NSSPCLK", NSSP, 3686400, 0, NULL), + INIT_CKEN("FICPCLK", FICP, 47923000, 0, NULL), + */ +}; + #ifdef CONFIG_PM #define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x @@ -215,6 +251,8 @@ static int __init pxa25x_init(void) int ret = 0; if (cpu_is_pxa21x() || cpu_is_pxa25x()) { + clks_register(pxa25x_clks, ARRAY_SIZE(pxa25x_clks)); + if ((ret = pxa_init_dma(16))) return ret; #ifdef CONFIG_PM diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c index 3710981b72d..433644edf79 100644 --- a/arch/arm/mach-pxa/pxa27x.c +++ b/arch/arm/mach-pxa/pxa27x.c @@ -27,6 +27,7 @@ #include "generic.h" #include "devices.h" +#include "clock.h" /* Crystal clock: 13MHz */ #define BASE_CLK 13000000 @@ -120,6 +121,48 @@ unsigned int pxa27x_get_lcdclk_frequency_10khz(void) return (K / 10000); } +static unsigned long clk_pxa27x_lcd_getrate(struct clk *clk) +{ + return pxa27x_get_lcdclk_frequency_10khz() * 10000; +} + +static const struct clkops clk_pxa27x_lcd_ops = { + .enable = clk_cken_enable, + .disable = clk_cken_disable, + .getrate = clk_pxa27x_lcd_getrate, +}; + +static struct clk pxa27x_clks[] = { + INIT_CK("LCDCLK", LCD, &clk_pxa27x_lcd_ops, &pxa_device_fb.dev), + INIT_CK("CAMCLK", CAMERA, &clk_pxa27x_lcd_ops, NULL), + + INIT_CKEN("UARTCLK", STUART, 14857000, 1, &pxa_device_stuart.dev), + INIT_CKEN("UARTCLK", FFUART, 14857000, 1, &pxa_device_ffuart.dev), + INIT_CKEN("UARTCLK", BTUART, 14857000, 1, &pxa_device_btuart.dev), + + INIT_CKEN("I2SCLK", I2S, 14682000, 0, &pxa_device_i2s.dev), + INIT_CKEN("I2CCLK", I2C, 32842000, 0, &pxa_device_i2c.dev), + INIT_CKEN("UDCCLK", USB, 48000000, 5, &pxa_device_udc.dev), + INIT_CKEN("MMCCLK", MMC, 19500000, 0, &pxa_device_mci.dev), + INIT_CKEN("FICPCLK", FICP, 48000000, 0, &pxa_device_ficp.dev), + + INIT_CKEN("USBCLK", USB, 48000000, 0, &pxa27x_device_ohci.dev), + INIT_CKEN("I2CCLK", PWRI2C, 13000000, 0, &pxa27x_device_i2c_power.dev), + INIT_CKEN("KBDCLK", KEYPAD, 32768, 0, NULL), + + /* + INIT_CKEN("PWMCLK", PWM0, 13000000, 0, NULL), + INIT_CKEN("SSPCLK", SSP1, 13000000, 0, NULL), + INIT_CKEN("SSPCLK", SSP2, 13000000, 0, NULL), + INIT_CKEN("SSPCLK", SSP3, 13000000, 0, NULL), + INIT_CKEN("MSLCLK", MSL, 48000000, 0, NULL), + INIT_CKEN("USIMCLK", USIM, 48000000, 0, NULL), + INIT_CKEN("MSTKCLK", MEMSTK, 19500000, 0, NULL), + INIT_CKEN("IMCLK", IM, 0, 0, NULL), + INIT_CKEN("MEMCLK", MEMC, 0, 0, NULL), + */ +}; + #ifdef CONFIG_PM #define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x @@ -343,6 +386,8 @@ static int __init pxa27x_init(void) { int ret = 0; if (cpu_is_pxa27x()) { + clks_register(pxa27x_clks, ARRAY_SIZE(pxa27x_clks)); + if ((ret = pxa_init_dma(32))) return ret; #ifdef CONFIG_PM |