[RFC v2 1/4] 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
---
drivers/rtc/rtc-at91rm9200.c | 42 --
1 file changed, 36 insertions(+), 6 deletions(-)
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index 79233d0..26e560c 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -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 +254,34 @@ static irqreturn_t at91_rtc_interrupt(int irq, void
*dev_id)
return IRQ_NONE;/* not handled */
}
+static const struct at91_rtc_config at91rm9200_config = {
+};
+
+static const struct of_device_id at91_rtc_dt_ids[] = {
+ {
+ .compatible = "atmel,at91rm9200-rtc",
+ .data = _config,
+ }, {
+ /* sentinel */
+ }
+};
+MODULE_DEVICE_TABLE(of, at91_rtc_dt_ids);
+
+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 _config;
+}
+
static const struct rtc_class_ops at91_rtc_ops = {
.read_time = at91_rtc_readtime,
.set_time = at91_rtc_settime,
@@ -268,6 +300,10 @@ 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(>dev, "no mmio resource defined\n");
@@ -383,12 +419,6 @@ static const struct dev_pm_ops at91_rtc_pm = {
#define at91_rtc_pm_ptrNULL
#endif
-static const struct of_device_id at91_rtc_dt_ids[] = {
- { .compatible = "atmel,at91rm9200-rtc" },
- { /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, at91_rtc_dt_ids);
-
static struct platform_driver at91_rtc_driver = {
.remove = __exit_p(at91_rtc_remove),
.driver = {
--
1.8.1.5
--
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[RFC v2 1/4] 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 jhov...@gmail.com
---
drivers/rtc/rtc-at91rm9200.c | 42 --
1 file changed, 36 insertions(+), 6 deletions(-)
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index 79233d0..26e560c 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -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 +254,34 @@ static irqreturn_t at91_rtc_interrupt(int irq, void
*dev_id)
return IRQ_NONE;/* not handled */
}
+static const struct at91_rtc_config at91rm9200_config = {
+};
+
+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);
+
+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 +300,10 @@ 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);
@@ -383,12 +419,6 @@ static const struct dev_pm_ops at91_rtc_pm = {
#define at91_rtc_pm_ptrNULL
#endif
-static const struct of_device_id at91_rtc_dt_ids[] = {
- { .compatible = atmel,at91rm9200-rtc },
- { /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, at91_rtc_dt_ids);
-
static struct platform_driver at91_rtc_driver = {
.remove = __exit_p(at91_rtc_remove),
.driver = {
--
1.8.1.5
--
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Please read the FAQ at http://www.tux.org/lkml/
