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rtc: rk808: check the rtc is available

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Change-Id: I383c08cd5ad7cb282c0ec0aa12e9e84c9df52ba3
Signed-off-by: shengfei Xu <xsf@rock-chips.com>
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
This commit is contained in:
shengfei Xu 2017-08-21 15:31:03 +08:00 committed by Tao Huang
parent fd1a4a6389
commit b3eba31466
1 changed files with 24 additions and 0 deletions
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24
drivers/rtc/rtc-rk808.c
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@ -388,13 +388,37 @@ static int rk808_rtc_probe(struct platform_device *pdev)
{
struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
struct rk808_rtc *rk808_rtc;
struct device_node *np;
int ret;
switch (rk808->variant) {
case RK805_ID:
case RK808_ID:
case RK816_ID:
case RK818_ID:
np = of_get_child_by_name(pdev->dev.parent->of_node, "rtc");
if (np && !of_device_is_available(np)) {
dev_info(&pdev->dev, "device is disabled\n");
return -EINVAL;
}
break;
default:
break;
}
rk808_rtc = devm_kzalloc(&pdev->dev, sizeof(*rk808_rtc), GFP_KERNEL);
if (rk808_rtc == NULL)
return -ENOMEM;
switch (rk808->variant) {
case RK808_ID:
case RK818_ID:
rk808_rtc->creg = &rk808_creg;
break;
case RK805_ID:
case RK816_ID:
rk808_rtc->creg = &rk808_creg;
break;
case RK809_ID:
case RK817_ID:
rk808_rtc->creg = &rk817_creg;