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rtc-at91rm9200: add configuration support 

Add configuration support which can be used to implement SoC-specific
workarounds for broken hardware.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Douglas Gilbert <dgilbert@interlog.com>
Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Ludovic Desroches <ludovic.desroches@atmel.com>
Cc: Robert Nelson <Robert.Nelson@digikey.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 2013-06-12 14:04:53 -07:00 committed by Linus Torvalds
parent 558c61e557
commit de64547591
1 changed files with 38 additions and 8 deletions
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46
drivers/rtc/rtc-at91rm9200.c
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@ -42,6 +42,10 @@
#define AT91_RTC_EPOCH 1900UL /* just like arch/arm/common/rtctime.c */
struct at91_rtc_config {
};
static const struct at91_rtc_config *at91_rtc_config;
static DECLARE_COMPLETION(at91_rtc_updated);
static unsigned int at91_alarm_year = AT91_RTC_EPOCH;
static void __iomem *at91_rtc_regs;
@ -250,6 +254,36 @@ static irqreturn_t at91_rtc_interrupt(int irq, void *dev_id)
return IRQ_NONE; /* not handled */
}
static const struct at91_rtc_config at91rm9200_config = {
};
#ifdef CONFIG_OF
static const struct of_device_id at91_rtc_dt_ids[] = {
{
.compatible = "atmel,at91rm9200-rtc",
.data = &at91rm9200_config,
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(of, at91_rtc_dt_ids);
#endif
static const struct at91_rtc_config *
at91_rtc_get_config(struct platform_device *pdev)
{
const struct of_device_id *match;
if (pdev->dev.of_node) {
match = of_match_node(at91_rtc_dt_ids, pdev->dev.of_node);
if (!match)
return NULL;
return (const struct at91_rtc_config *)match->data;
}
return &at91rm9200_config;
}
static const struct rtc_class_ops at91_rtc_ops = {
.read_time = at91_rtc_readtime,
.set_time = at91_rtc_settime,
@ -268,6 +302,10 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
struct resource *regs;
int ret = 0;
at91_rtc_config = at91_rtc_get_config(pdev);
if (!at91_rtc_config)
return -ENODEV;
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!regs) {
dev_err(&pdev->dev, "no mmio resource defined\n");
@ -383,14 +421,6 @@ static int at91_rtc_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(at91_rtc_pm_ops, at91_rtc_suspend, at91_rtc_resume);
#ifdef CONFIG_OF
static const struct of_device_id at91_rtc_dt_ids[] = {
{ .compatible = "atmel,at91rm9200-rtc" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, at91_rtc_dt_ids);
#endif
static struct platform_driver at91_rtc_driver = {
.remove = __exit_p(at91_rtc_remove),
.driver = {