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rtc: tx4939: 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@bootlin.com>
hifive-unleashed-5.1
Alexandre Belloni 2018-02-12 23:47:59 +01:00
parent a2fa9b8e5a
commit dd888c61c9
1 changed files with 26 additions and 33 deletions
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59
drivers/rtc/rtc-tx4939.c
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@ -212,58 +212,52 @@ static const struct rtc_class_ops tx4939_rtc_ops = {
.alarm_irq_enable = tx4939_rtc_alarm_irq_enable,
};
static ssize_t tx4939_rtc_nvram_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t pos, size_t size)
static int tx4939_nvram_read(void *priv, unsigned int pos, void *val,
size_t bytes)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct tx4939rtc_plat_data *pdata = get_tx4939rtc_plat_data(dev);
struct tx4939rtc_plat_data *pdata = priv;
struct tx4939_rtc_reg __iomem *rtcreg = pdata->rtcreg;
ssize_t count;
u8 *buf = val;
spin_lock_irq(&pdata->lock);
for (count = 0; count < size; count++) {
for (; bytes; bytes--) {
__raw_writel(pos++, &rtcreg->adr);
*buf++ = __raw_readl(&rtcreg->dat);
}
spin_unlock_irq(&pdata->lock);
return count;
return 0;
}
static ssize_t tx4939_rtc_nvram_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t pos, size_t size)
static int tx4939_nvram_write(void *priv, unsigned int pos, void *val,
size_t bytes)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct tx4939rtc_plat_data *pdata = get_tx4939rtc_plat_data(dev);
struct tx4939rtc_plat_data *pdata = priv;
struct tx4939_rtc_reg __iomem *rtcreg = pdata->rtcreg;
ssize_t count;
u8 *buf = val;
spin_lock_irq(&pdata->lock);
for (count = 0; count < size; count++) {
for (; bytes; bytes--) {
__raw_writel(pos++, &rtcreg->adr);
__raw_writel(*buf++, &rtcreg->dat);
}
spin_unlock_irq(&pdata->lock);
return count;
return 0;
}
static struct bin_attribute tx4939_rtc_nvram_attr = {
.attr = {
.name = "nvram",
.mode = S_IRUGO | S_IWUSR,
},
.size = TX4939_RTC_REG_RAMSIZE,
.read = tx4939_rtc_nvram_read,
.write = tx4939_rtc_nvram_write,
};
static int __init tx4939_rtc_probe(struct platform_device *pdev)
{
struct rtc_device *rtc;
struct tx4939rtc_plat_data *pdata;
struct resource *res;
int irq, ret;
struct nvmem_config nvmem_cfg = {
.name = "rv8803_nvram",
.word_size = 4,
.stride = 4,
.size = TX4939_RTC_REG_RAMSIZE,
.reg_read = tx4939_nvram_read,
.reg_write = tx4939_nvram_write,
};
irq = platform_get_irq(pdev, 0);
if (irq < 0)
@ -288,23 +282,22 @@ static int __init tx4939_rtc_probe(struct platform_device *pdev)
return PTR_ERR(rtc);
rtc->ops = &tx4939_rtc_ops;
ret = sysfs_create_bin_file(&pdev->dev.kobj, &tx4939_rtc_nvram_attr);
if (ret)
return ret;
rtc->nvram_old_abi = true;
pdata->rtc = rtc;
ret = rtc_register_device(rtc);
nvmem_cfg.priv = pdata;
ret = rtc_nvmem_register(rtc, &nvmem_cfg);
if (ret)
return ret;
return ret;
return rtc_register_device(rtc);
}
static int __exit tx4939_rtc_remove(struct platform_device *pdev)
{
struct tx4939rtc_plat_data *pdata = platform_get_drvdata(pdev);
sysfs_remove_bin_file(&pdev->dev.kobj, &tx4939_rtc_nvram_attr);
spin_lock_irq(&pdata->lock);
tx4939_rtc_cmd(pdata->rtcreg, TX4939_RTCCTL_COMMAND_NOP);
spin_unlock_irq(&pdata->lock);