[PATCH] rtc: snvs: add Freescale rtc-snvs driver

[Stephen Boyd]

On 07/02/12 09:09, Shawn Guo wrote:
> diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
> index 08cbdb9..511ddcb 100644
> --- a/drivers/rtc/Kconfig
> +++ b/drivers/rtc/Kconfig
> @@ -1087,4 +1087,14 @@ config RTC_DRV_MXC
>  	   This driver can also be built as a module, if so, the module
>  	   will be called "rtc-mxc".
>  
> +config RTC_DRV_SNVS
> +	tristate "Freescale SNVS RTC support"
> +	depends on ARCH_MXC

If you want more build coverage you can depend on HAS_IOMEM and drop the
ARCH_MXC part.

> +	help
> +	   If you say yes here you get support for the Freescale SNVS
> +	   Low Power (LP) RTC module.
> +
> diff --git a/drivers/rtc/rtc-snvs.c b/drivers/rtc/rtc-snvs.c
> new file mode 100644
> index 0000000..761c91f
> --- /dev/null
> +++ b/drivers/rtc/rtc-snvs.c
> @@ -0,0 +1,350 @@
> +/*
> + * Copyright (C) 2011-2012 Freescale Semiconductor, Inc.
> + *
> + * The code contained herein is licensed under the GNU General Public
> + * License. You may obtain a copy of the GNU General Public License
> + * Version 2 or later at the following locations:
> + *
> + * http://www.opensource.org/licenses/gpl-license.html
> + * http://www.gnu.org/copyleft/gpl.html
> + */
> +
> +#include <linux/delay.h>

Is this include used?

> +
> +static struct rtc_class_ops snvs_rtc_ops = {

const?

> +static irqreturn_t snvs_rtc_irq_handler(int irq, void *dev_id)
> +{
> +	struct device *dev = dev_id;
> +	struct snvs_rtc_data *data = dev_get_drvdata(dev);

Why not just pass the svsns_rtc_data to request_irq() so you can cast
dev_id directly?

> +static int __devinit snvs_rtc_probe(struct platform_device *pdev)
> +{
> +	struct snvs_rtc_data *data;
> +	struct resource *res;
> +	int ret;
> +
> +	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
> +	if (!data)
> +		return -ENOMEM;
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	data->ioaddr = devm_request_and_ioremap(&pdev->dev, res);
> +	if (!data->ioaddr)
> +		return -EADDRNOTAVAIL;
> +
> +	data->irq = platform_get_irq(pdev, 0);

What if this irq fails to exist?


> +static const struct of_device_id __devinitdata snvs_dt_ids[] = {

Is this supposed to be __devinitconst?

> +	{ .compatible = "fsl,sec-v4.0-mon" },
> +	{ /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, snvs_dt_ids);

Surround this of_device table in #ifdef CONFIG_OF?

> +
> +static struct platform_driver snvs_rtc_driver = {
> +	.driver = {
> +		.name	= "snvs_rtc",
> +		.owner	= THIS_MODULE,
> +		.of_match_table = snvs_dt_ids,

.of_match_table = of_match_ptr(svns_dt_ids)

> +	},
> +	.probe		= snvs_rtc_probe,
> +	.remove		= __devexit_p(snvs_rtc_remove),
> +	.suspend	= snvs_rtc_suspend,
> +	.resume		= snvs_rtc_resume,

Can you use dev_pm_ops?

-- 
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.