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Message-Id: <20180301102554.6687-1-alexandre.belloni@bootlin.com>
Date: Thu, 1 Mar 2018 11:25:54 +0100
From: Alexandre Belloni <alexandre.belloni@...tlin.com>
To: linux-rtc@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
Alexandre Belloni <alexandre.belloni@...tlin.com>
Subject: [PATCH v2] rtc: stk17ta8: use generic nvmem
Instead of adding a binary sysfs attribute from the driver, use the core to
register an nvmem device.
Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
---
drivers/rtc/rtc-stk17ta8.c | 64 +++++++++++++++++-----------------------------
1 file changed, 24 insertions(+), 40 deletions(-)
diff --git a/drivers/rtc/rtc-stk17ta8.c b/drivers/rtc/rtc-stk17ta8.c
index 1d6febbe7d39..01a3bef77aa5 100644
--- a/drivers/rtc/rtc-stk17ta8.c
+++ b/drivers/rtc/rtc-stk17ta8.c
@@ -242,46 +242,30 @@ static const struct rtc_class_ops stk17ta8_rtc_ops = {
.alarm_irq_enable = stk17ta8_rtc_alarm_irq_enable,
};
-static ssize_t stk17ta8_nvram_read(struct file *filp, struct kobject *kobj,
- struct bin_attribute *attr, char *buf,
- loff_t pos, size_t size)
+static int stk17ta8_nvram_read(void *priv, unsigned int pos, void *val,
+ size_t bytes)
{
- struct device *dev = container_of(kobj, struct device, kobj);
- struct platform_device *pdev = to_platform_device(dev);
- struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
+ struct rtc_plat_data *pdata = priv;
void __iomem *ioaddr = pdata->ioaddr;
- ssize_t count;
+ u8 *buf = val;
- for (count = 0; count < size; count++)
+ for (; bytes; bytes--)
*buf++ = readb(ioaddr + pos++);
- return count;
+ return 0;
}
-static ssize_t stk17ta8_nvram_write(struct file *filp, struct kobject *kobj,
- struct bin_attribute *attr, char *buf,
- loff_t pos, size_t size)
+static int stk17ta8_nvram_write(void *priv, unsigned int pos, void *val,
+ size_t bytes)
{
- struct device *dev = container_of(kobj, struct device, kobj);
- struct platform_device *pdev = to_platform_device(dev);
- struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
+ struct rtc_plat_data *pdata = priv;
void __iomem *ioaddr = pdata->ioaddr;
- ssize_t count;
+ u8 *buf = val;
- for (count = 0; count < size; count++)
+ for (; bytes; bytes--)
writeb(*buf++, ioaddr + pos++);
- return count;
+ return 0;
}
-static struct bin_attribute stk17ta8_nvram_attr = {
- .attr = {
- .name = "nvram",
- .mode = S_IRUGO | S_IWUSR,
- },
- .size = RTC_OFFSET,
- .read = stk17ta8_nvram_read,
- .write = stk17ta8_nvram_write,
-};
-
static int stk17ta8_rtc_probe(struct platform_device *pdev)
{
struct resource *res;
@@ -290,6 +274,14 @@ static int stk17ta8_rtc_probe(struct platform_device *pdev)
struct rtc_plat_data *pdata;
void __iomem *ioaddr;
int ret = 0;
+ struct nvmem_config nvmem_cfg = {
+ .name = "stk17ta8_nvram",
+ .word_size = 1,
+ .stride = 1,
+ .size = RTC_OFFSET,
+ .reg_read = stk17ta8_nvram_read,
+ .reg_write = stk17ta8_nvram_write,
+ };
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
@@ -333,21 +325,14 @@ static int stk17ta8_rtc_probe(struct platform_device *pdev)
return PTR_ERR(pdata->rtc);
pdata->rtc->ops = &stk17ta8_rtc_ops;
+ pdata->rtc->nvram_old_abi = true;
- ret = sysfs_create_bin_file(&pdev->dev.kobj, &stk17ta8_nvram_attr);
+ nvmem_cfg.priv = pdata;
+ ret = rtc_nvmem_register(pdata->rtc, &nvmem_cfg);
if (ret)
return ret;
- ret = rtc_register_device(pdata->rtc);
-
- return ret;
-}
-
-static int stk17ta8_rtc_remove(struct platform_device *pdev)
-{
- sysfs_remove_bin_file(&pdev->dev.kobj, &stk17ta8_nvram_attr);
-
- return 0;
+ return rtc_register_device(pdata->rtc);
}
/* work with hotplug and coldplug */
@@ -355,7 +340,6 @@ MODULE_ALIAS("platform:stk17ta8");
static struct platform_driver stk17ta8_rtc_driver = {
.probe = stk17ta8_rtc_probe,
- .remove = stk17ta8_rtc_remove,
.driver = {
.name = "stk17ta8",
},
--
2.16.2
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