diff options
Diffstat (limited to 'arch/arm/plat-samsung/clock.c')
| -rw-r--r-- | arch/arm/plat-samsung/clock.c | 114 |
1 files changed, 18 insertions, 96 deletions
diff --git a/arch/arm/plat-samsung/clock.c b/arch/arm/plat-samsung/clock.c index 772892826ffc..3b4451979d1b 100644 --- a/arch/arm/plat-samsung/clock.c +++ b/arch/arm/plat-samsung/clock.c @@ -64,79 +64,22 @@ static LIST_HEAD(clocks); */ DEFINE_SPINLOCK(clocks_lock); -/* enable and disable calls for use with the clk struct */ - -static int clk_null_enable(struct clk *clk, int enable) +/* Global watchdog clock used by arch_wtd_reset() callback */ +struct clk *s3c2410_wdtclk; +static int __init s3c_wdt_reset_init(void) { + s3c2410_wdtclk = clk_get(NULL, "watchdog"); + if (IS_ERR(s3c2410_wdtclk)) + printk(KERN_WARNING "%s: warning: cannot get watchdog clock\n", __func__); return 0; } +arch_initcall(s3c_wdt_reset_init); -static int dev_is_s3c_uart(struct device *dev) -{ - struct platform_device **pdev = s3c24xx_uart_devs; - int i; - for (i = 0; i < ARRAY_SIZE(s3c24xx_uart_devs); i++, pdev++) - if (*pdev && dev == &(*pdev)->dev) - return 1; - return 0; -} - -/* - * Serial drivers call get_clock() very early, before platform bus - * has been set up, this requires a special check to let them get - * a proper clock - */ - -static int dev_is_platform_device(struct device *dev) -{ - return dev->bus == &platform_bus_type || - (dev->bus == NULL && dev_is_s3c_uart(dev)); -} - -/* Clock API calls */ - -struct clk *clk_get(struct device *dev, const char *id) -{ - struct clk *p; - struct clk *clk = ERR_PTR(-ENOENT); - int idno; - - if (dev == NULL || !dev_is_platform_device(dev)) - idno = -1; - else - idno = to_platform_device(dev)->id; - - spin_lock(&clocks_lock); - - list_for_each_entry(p, &clocks, list) { - if (p->id == idno && - strcmp(id, p->name) == 0 && - try_module_get(p->owner)) { - clk = p; - break; - } - } - - /* check for the case where a device was supplied, but the - * clock that was being searched for is not device specific */ - - if (IS_ERR(clk)) { - list_for_each_entry(p, &clocks, list) { - if (p->id == -1 && strcmp(id, p->name) == 0 && - try_module_get(p->owner)) { - clk = p; - break; - } - } - } - - spin_unlock(&clocks_lock); - return clk; -} +/* enable and disable calls for use with the clk struct */ -void clk_put(struct clk *clk) +static int clk_null_enable(struct clk *clk, int enable) { - module_put(clk->owner); + return 0; } int clk_enable(struct clk *clk) @@ -241,8 +184,6 @@ int clk_set_parent(struct clk *clk, struct clk *parent) return ret; } -EXPORT_SYMBOL(clk_get); -EXPORT_SYMBOL(clk_put); EXPORT_SYMBOL(clk_enable); EXPORT_SYMBOL(clk_disable); EXPORT_SYMBOL(clk_get_rate); @@ -265,7 +206,6 @@ struct clk_ops clk_ops_def_setrate = { struct clk clk_xtal = { .name = "xtal", - .id = -1, .rate = 0, .parent = NULL, .ctrlbit = 0, @@ -273,30 +213,25 @@ struct clk clk_xtal = { struct clk clk_ext = { .name = "ext", - .id = -1, }; struct clk clk_epll = { .name = "epll", - .id = -1, }; struct clk clk_mpll = { .name = "mpll", - .id = -1, .ops = &clk_ops_def_setrate, }; struct clk clk_upll = { .name = "upll", - .id = -1, .parent = NULL, .ctrlbit = 0, }; struct clk clk_f = { .name = "fclk", - .id = -1, .rate = 0, .parent = &clk_mpll, .ctrlbit = 0, @@ -304,7 +239,6 @@ struct clk clk_f = { struct clk clk_h = { .name = "hclk", - .id = -1, .rate = 0, .parent = NULL, .ctrlbit = 0, @@ -313,7 +247,6 @@ struct clk clk_h = { struct clk clk_p = { .name = "pclk", - .id = -1, .rate = 0, .parent = NULL, .ctrlbit = 0, @@ -322,7 +255,6 @@ struct clk clk_p = { struct clk clk_usb_bus = { .name = "usb-bus", - .id = -1, .rate = 0, .parent = &clk_upll, }; @@ -330,7 +262,6 @@ struct clk clk_usb_bus = { struct clk s3c24xx_uclk = { .name = "uclk", - .id = -1, }; /* initialise the clock system */ @@ -346,14 +277,11 @@ int s3c24xx_register_clock(struct clk *clk) if (clk->enable == NULL) clk->enable = clk_null_enable; - /* add to the list of available clocks */ - - /* Quick check to see if this clock has already been registered. */ - BUG_ON(clk->list.prev != clk->list.next); - - spin_lock(&clocks_lock); - list_add(&clk->list, &clocks); - spin_unlock(&clocks_lock); + /* fill up the clk_lookup structure and register it*/ + clk->lookup.dev_id = clk->devname; + clk->lookup.con_id = clk->name; + clk->lookup.clk = clk; + clkdev_add(&clk->lookup); return 0; } @@ -458,15 +386,12 @@ static struct dentry *clk_debugfs_root; static int clk_debugfs_register_one(struct clk *c) { int err; - struct dentry *d, *child, *child_tmp; + struct dentry *d; struct clk *pa = c->parent; char s[255]; char *p = s; - p += sprintf(p, "%s", c->name); - - if (c->id >= 0) - sprintf(p, ":%d", c->id); + p += sprintf(p, "%s", c->devname); d = debugfs_create_dir(s, pa ? pa->dent : clk_debugfs_root); if (!d) @@ -488,10 +413,7 @@ static int clk_debugfs_register_one(struct clk *c) return 0; err_out: - d = c->dent; - list_for_each_entry_safe(child, child_tmp, &d->d_subdirs, d_u.d_child) - debugfs_remove(child); - debugfs_remove(c->dent); + debugfs_remove_recursive(c->dent); return err; } |