[PATCH v2 11/20] rtc: omap: add structured device-type info

Johan Hovold
2014-10-21T17:37:57Z

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

Signed-off-by: Johan Hovold <johan@kernel.org>
---
drivers/rtc/rtc-omap.c | 103 ++++++++++++++++++++++++-------------------------
1 file changed, 51 insertions(+), 52 deletions(-)

diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index f70ae660368b..1abd88e24c22 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -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 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_devtype[] = {
+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);
--
2.0.4