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rtc: omap: add structured device-type info 

Add structured device-type info to encode IP-block revision differences.

Signed-off-by: Johan Hovold <johan@kernel.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Benot Cousson <bcousson@baylibre.com>
Cc: Lokesh Vutla <lokeshvutla@ti.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Tero Kristo <t-kristo@ti.com>
Cc: Keerthy J <j-keerthy@ti.com>
Tested-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Johan Hovold 2014-12-10 15:53:01 -08:00 committed by Linus Torvalds
parent a430ca2267
commit 2153f94943
1 changed files with 51 additions and 52 deletions
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103
drivers/rtc/rtc-omap.c
View File

@ -102,19 +102,11 @@
#define KICK0_VALUE 0x83e70b13
#define KICK1_VALUE 0x95a4f1e0
#define OMAP_RTC_HAS_KICKER BIT(0)
/*
* Few RTC IP revisions has special WAKE-EN Register to enable Wakeup
* generation for event Alarm.
*/
#define OMAP_RTC_HAS_IRQWAKEEN BIT(1)
/*
* Some RTC IP revisions (like those in AM335x and DRA7x) need
* the 32KHz clock to be explicitly enabled.
*/
#define OMAP_RTC_HAS_32KCLK_EN BIT(2)
struct omap_rtc_device_type {
bool has_32kclk_en;
bool has_kicker;
bool has_irqwakeen;
};
struct omap_rtc {
struct rtc_device *rtc;
@ -122,7 +114,7 @@ struct omap_rtc {
int irq_alarm;
int irq_timer;
u8 interrupts_reg;
unsigned long flags;
const struct omap_rtc_device_type *type;
};
static inline u8 rtc_read(struct omap_rtc *rtc, unsigned int reg)
@ -190,7 +182,7 @@ static int omap_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
local_irq_disable();
rtc_wait_not_busy(rtc);
reg = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
if (rtc->flags & OMAP_RTC_HAS_IRQWAKEEN)
if (rtc->type->has_irqwakeen)
irqwake_reg = rtc_read(rtc, OMAP_RTC_IRQWAKEEN);
if (enabled) {
@ -202,7 +194,7 @@ static int omap_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
}
rtc_wait_not_busy(rtc);
rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, reg);
if (rtc->flags & OMAP_RTC_HAS_IRQWAKEEN)
if (rtc->type->has_irqwakeen)
rtc_write(rtc, OMAP_RTC_IRQWAKEEN, irqwake_reg);
local_irq_enable();
@ -326,7 +318,7 @@ static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
rtc_write(rtc, OMAP_RTC_ALARM_SECONDS_REG, alm->time.tm_sec);
reg = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
if (rtc->flags & OMAP_RTC_HAS_IRQWAKEEN)
if (rtc->type->has_irqwakeen)
irqwake_reg = rtc_read(rtc, OMAP_RTC_IRQWAKEEN);
if (alm->enabled) {
@ -337,7 +329,7 @@ static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
irqwake_reg &= ~OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN;
}
rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, reg);
if (rtc->flags & OMAP_RTC_HAS_IRQWAKEEN)
if (rtc->type->has_irqwakeen)
rtc_write(rtc, OMAP_RTC_IRQWAKEEN, irqwake_reg);
local_irq_enable();
@ -353,34 +345,45 @@ static struct rtc_class_ops omap_rtc_ops = {
.alarm_irq_enable = omap_rtc_alarm_irq_enable,
};
#define OMAP_RTC_DATA_AM3352_IDX 1
#define OMAP_RTC_DATA_DA830_IDX 2
static const struct omap_rtc_device_type omap_rtc_default_type = {
};
static const struct platform_device_id omap_rtc_devtype[] = {
static const struct omap_rtc_device_type omap_rtc_am3352_type = {
.has_32kclk_en = true,
.has_kicker = true,
.has_irqwakeen = true,
};
static const struct omap_rtc_device_type omap_rtc_da830_type = {
.has_kicker = true,
};
static const struct platform_device_id omap_rtc_id_table[] = {
{
.name = "omap_rtc",
},
[OMAP_RTC_DATA_AM3352_IDX] = {
.driver_data = (kernel_ulong_t)&omap_rtc_default_type,
}, {
.name = "am3352-rtc",
.driver_data = OMAP_RTC_HAS_KICKER | OMAP_RTC_HAS_IRQWAKEEN |
OMAP_RTC_HAS_32KCLK_EN,
},
[OMAP_RTC_DATA_DA830_IDX] = {
.driver_data = (kernel_ulong_t)&omap_rtc_am3352_type,
}, {
.name = "da830-rtc",
.driver_data = OMAP_RTC_HAS_KICKER,
},
{},
.driver_data = (kernel_ulong_t)&omap_rtc_da830_type,
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(platform, omap_rtc_devtype);
MODULE_DEVICE_TABLE(platform, omap_rtc_id_table);
static const struct of_device_id omap_rtc_of_match[] = {
{ .compatible = "ti,da830-rtc",
.data = &omap_rtc_devtype[OMAP_RTC_DATA_DA830_IDX],
},
{ .compatible = "ti,am3352-rtc",
.data = &omap_rtc_devtype[OMAP_RTC_DATA_AM3352_IDX],
},
{},
{
.compatible = "ti,am3352-rtc",
.data = &omap_rtc_am3352_type,
}, {
.compatible = "ti,da830-rtc",
.data = &omap_rtc_da830_type,
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(of, omap_rtc_of_match);
@ -398,17 +401,13 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
return -ENOMEM;
of_id = of_match_device(omap_rtc_of_match, &pdev->dev);
if (of_id)
pdev->id_entry = of_id->data;
id_entry = platform_get_device_id(pdev);
if (!id_entry) {
dev_err(&pdev->dev, "no matching device entry\n");
return -ENODEV;
if (of_id) {
rtc->type = of_id->data;
} else {
id_entry = platform_get_device_id(pdev);
rtc->type = (void *)id_entry->driver_data;
}
rtc->flags = id_entry->driver_data;
rtc->irq_timer = platform_get_irq(pdev, 0);
if (rtc->irq_timer <= 0)
return -ENOENT;
@ -428,7 +427,7 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
if (rtc->flags & OMAP_RTC_HAS_KICKER) {
if (rtc->type->has_kicker) {
rtc_writel(rtc, OMAP_RTC_KICK0_REG, KICK0_VALUE);
rtc_writel(rtc, OMAP_RTC_KICK1_REG, KICK1_VALUE);
}
@ -441,7 +440,7 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
rtc_writel(rtc, OMAP_RTC_INTERRUPTS_REG, 0);
/* enable RTC functional clock */
if (rtc->flags & OMAP_RTC_HAS_32KCLK_EN) {
if (rtc->type->has_32kclk_en) {
reg = rtc_read(rtc, OMAP_RTC_OSC_REG);
rtc_writel(rtc, OMAP_RTC_OSC_REG,
reg | OMAP_RTC_OSC_32KCLK_EN);
@ -511,7 +510,7 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
err:
device_init_wakeup(&pdev->dev, false);
if (rtc->flags & OMAP_RTC_HAS_KICKER)
if (rtc->type->has_kicker)
rtc_writel(rtc, OMAP_RTC_KICK0_REG, 0);
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
@ -528,7 +527,7 @@ static int __exit omap_rtc_remove(struct platform_device *pdev)
/* leave rtc running, but disable irqs */
rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, 0);
if (rtc->flags & OMAP_RTC_HAS_KICKER)
if (rtc->type->has_kicker)
rtc_writel(rtc, OMAP_RTC_KICK0_REG, 0);
/* Disable the clock/module */
@ -594,7 +593,7 @@ static struct platform_driver omap_rtc_driver = {
.pm = &omap_rtc_pm_ops,
.of_match_table = omap_rtc_of_match,
},
.id_table = omap_rtc_devtype,
.id_table = omap_rtc_id_table,
};
module_platform_driver_probe(omap_rtc_driver, omap_rtc_probe);