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Subject[PATCH 02/11] rtc: class separate id allocation from registration
Date
Create rtc_device_get_id to allocate the id for an RTC.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
drivers/rtc/class.c | 44 +++++++++++++++++++++++++-------------------
1 file changed, 25 insertions(+), 19 deletions(-)

diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c
index fb39c1334d7b..93ce88e1b1cb 100644
--- a/drivers/rtc/class.c
+++ b/drivers/rtc/class.c
@@ -186,6 +186,27 @@ static struct rtc_device *rtc_allocate_device(void)
return rtc;
}

+static int rtc_device_get_id(struct device *dev)
+{
+ int of_id = -1, id = -1;
+
+ if (dev->of_node)
+ of_id = of_alias_get_id(dev->of_node, "rtc");
+ else if (dev->parent && dev->parent->of_node)
+ of_id = of_alias_get_id(dev->parent->of_node, "rtc");
+
+ if (of_id >= 0) {
+ id = ida_simple_get(&rtc_ida, of_id, of_id + 1, GFP_KERNEL);
+ if (id < 0)
+ dev_warn(dev, "/aliases ID %d not available\n", of_id);
+ }
+
+ if (id < 0)
+ id = ida_simple_get(&rtc_ida, 0, 0, GFP_KERNEL);
+
+ return id;
+}
+
/**
* rtc_device_register - register w/ RTC class
* @dev: the device to register
@@ -201,27 +222,12 @@ struct rtc_device *rtc_device_register(const char *name, struct device *dev,
{
struct rtc_device *rtc;
struct rtc_wkalrm alrm;
- int of_id = -1, id = -1, err;
-
- if (dev->of_node)
- of_id = of_alias_get_id(dev->of_node, "rtc");
- else if (dev->parent && dev->parent->of_node)
- of_id = of_alias_get_id(dev->parent->of_node, "rtc");
-
- if (of_id >= 0) {
- id = ida_simple_get(&rtc_ida, of_id, of_id + 1,
- GFP_KERNEL);
- if (id < 0)
- dev_warn(dev, "/aliases ID %d not available\n",
- of_id);
- }
+ int id, err;

+ id = rtc_device_get_id(dev);
if (id < 0) {
- id = ida_simple_get(&rtc_ida, 0, 0, GFP_KERNEL);
- if (id < 0) {
- err = id;
- goto exit;
- }
+ err = id;
+ goto exit;
}

rtc = rtc_allocate_device();
--
2.11.0
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