diff options
Diffstat (limited to 'drivers/rtc/rtc-omap.c')
| -rw-r--r-- | drivers/rtc/rtc-omap.c | 80 |
1 files changed, 77 insertions, 3 deletions
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c index 0b614e32653d..600971407aac 100644 --- a/drivers/rtc/rtc-omap.c +++ b/drivers/rtc/rtc-omap.c @@ -20,6 +20,9 @@ #include <linux/rtc.h> #include <linux/bcd.h> #include <linux/platform_device.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/pm_runtime.h> #include <asm/io.h> @@ -38,6 +41,8 @@ * the SoC). See the BOARD-SPECIFIC CUSTOMIZATION comment. */ +#define DRIVER_NAME "omap_rtc" + #define OMAP_RTC_BASE 0xfffb4800 /* RTC registers */ @@ -64,6 +69,9 @@ #define OMAP_RTC_COMP_MSB_REG 0x50 #define OMAP_RTC_OSC_REG 0x54 +#define OMAP_RTC_KICK0_REG 0x6c +#define OMAP_RTC_KICK1_REG 0x70 + /* OMAP_RTC_CTRL_REG bit fields: */ #define OMAP_RTC_CTRL_SPLIT (1<<7) #define OMAP_RTC_CTRL_DISABLE (1<<6) @@ -88,10 +96,18 @@ #define OMAP_RTC_INTERRUPTS_IT_ALARM (1<<3) #define OMAP_RTC_INTERRUPTS_IT_TIMER (1<<2) +/* OMAP_RTC_KICKER values */ +#define KICK0_VALUE 0x83e70b13 +#define KICK1_VALUE 0x95a4f1e0 + +#define OMAP_RTC_HAS_KICKER 0x1 + static void __iomem *rtc_base; -#define rtc_read(addr) __raw_readb(rtc_base + (addr)) -#define rtc_write(val, addr) __raw_writeb(val, rtc_base + (addr)) +#define rtc_read(addr) readb(rtc_base + (addr)) +#define rtc_write(val, addr) writeb(val, rtc_base + (addr)) + +#define rtc_writel(val, addr) writel(val, rtc_base + (addr)) /* we rely on the rtc framework to handle locking (rtc->ops_lock), @@ -285,11 +301,38 @@ static struct rtc_class_ops omap_rtc_ops = { static int omap_rtc_alarm; static int omap_rtc_timer; +#define OMAP_RTC_DATA_DA830_IDX 1 + +static struct platform_device_id omap_rtc_devtype[] = { + { + .name = DRIVER_NAME, + }, { + .name = "da830-rtc", + .driver_data = OMAP_RTC_HAS_KICKER, + }, + {}, +}; +MODULE_DEVICE_TABLE(platform, omap_rtc_devtype); + +static const struct of_device_id omap_rtc_of_match[] = { + { .compatible = "ti,da830-rtc", + .data = &omap_rtc_devtype[OMAP_RTC_DATA_DA830_IDX], + }, + {}, +}; +MODULE_DEVICE_TABLE(of, omap_rtc_of_match); + static int __init omap_rtc_probe(struct platform_device *pdev) { struct resource *res, *mem; struct rtc_device *rtc; u8 reg, new_ctrl; + const struct platform_device_id *id_entry; + const struct of_device_id *of_id; + + of_id = of_match_device(omap_rtc_of_match, &pdev->dev); + if (of_id) + pdev->id_entry = of_id->data; omap_rtc_timer = platform_get_irq(pdev, 0); if (omap_rtc_timer <= 0) { @@ -322,6 +365,16 @@ static int __init omap_rtc_probe(struct platform_device *pdev) goto fail; } + /* Enable the clock/module so that we can access the registers */ + pm_runtime_enable(&pdev->dev); + pm_runtime_get_sync(&pdev->dev); + + id_entry = platform_get_device_id(pdev); + if (id_entry && (id_entry->driver_data & OMAP_RTC_HAS_KICKER)) { + rtc_writel(KICK0_VALUE, OMAP_RTC_KICK0_REG); + rtc_writel(KICK1_VALUE, OMAP_RTC_KICK1_REG); + } + rtc = rtc_device_register(pdev->name, &pdev->dev, &omap_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) { @@ -398,6 +451,10 @@ fail2: fail1: rtc_device_unregister(rtc); fail0: + if (id_entry && (id_entry->driver_data & OMAP_RTC_HAS_KICKER)) + rtc_writel(0, OMAP_RTC_KICK0_REG); + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); iounmap(rtc_base); fail: release_mem_region(mem->start, resource_size(mem)); @@ -408,6 +465,8 @@ static int __exit omap_rtc_remove(struct platform_device *pdev) { struct rtc_device *rtc = platform_get_drvdata(pdev); struct resource *mem = dev_get_drvdata(&rtc->dev); + const struct platform_device_id *id_entry = + platform_get_device_id(pdev); device_init_wakeup(&pdev->dev, 0); @@ -420,6 +479,13 @@ static int __exit omap_rtc_remove(struct platform_device *pdev) free_irq(omap_rtc_alarm, rtc); rtc_device_unregister(rtc); + if (id_entry && (id_entry->driver_data & OMAP_RTC_HAS_KICKER)) + rtc_writel(0, OMAP_RTC_KICK0_REG); + + /* Disable the clock/module */ + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + iounmap(rtc_base); release_mem_region(mem->start, resource_size(mem)); return 0; @@ -442,11 +508,17 @@ static int omap_rtc_suspend(struct platform_device *pdev, pm_message_t state) else rtc_write(0, OMAP_RTC_INTERRUPTS_REG); + /* Disable the clock/module */ + pm_runtime_put_sync(&pdev->dev); + return 0; } static int omap_rtc_resume(struct platform_device *pdev) { + /* Enable the clock/module so that we can access the registers */ + pm_runtime_get_sync(&pdev->dev); + if (device_may_wakeup(&pdev->dev)) disable_irq_wake(omap_rtc_alarm); else @@ -471,9 +543,11 @@ static struct platform_driver omap_rtc_driver = { .resume = omap_rtc_resume, .shutdown = omap_rtc_shutdown, .driver = { - .name = "omap_rtc", + .name = DRIVER_NAME, .owner = THIS_MODULE, + .of_match_table = of_match_ptr(omap_rtc_of_match), }, + .id_table = omap_rtc_devtype, }; static int __init rtc_init(void) |