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path: root/drivers/rtc/rtc-pcf2123.c
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Diffstat (limited to 'drivers/rtc/rtc-pcf2123.c')
-rw-r--r--drivers/rtc/rtc-pcf2123.c136
1 files changed, 68 insertions, 68 deletions
diff --git a/drivers/rtc/rtc-pcf2123.c b/drivers/rtc/rtc-pcf2123.c
index fb542a930bf0..c3691fa4210e 100644
--- a/drivers/rtc/rtc-pcf2123.c
+++ b/drivers/rtc/rtc-pcf2123.c
@@ -82,7 +82,7 @@
#define OSC_HAS_STOPPED BIT(7) /* Clock has been stopped */
/* PCF2123_REG_ALRM_XX BITS */
-#define ALRM_ENABLE BIT(7) /* MN, HR, DM, or DW alarm enable */
+#define ALRM_DISABLE BIT(7) /* MN, HR, DM, or DW alarm matching */
/* PCF2123_REG_TMR_CLKOUT BITS */
#define CD_TMR_4096KHZ (0) /* 4096 KHz countdown timer */
@@ -104,7 +104,7 @@
static struct spi_driver pcf2123_driver;
-struct pcf2123_plat_data {
+struct pcf2123_data {
struct rtc_device *rtc;
struct regmap *map;
};
@@ -119,11 +119,11 @@ static const struct regmap_config pcf2123_regmap_config = {
static int pcf2123_read_offset(struct device *dev, long *offset)
{
- struct pcf2123_plat_data *pdata = dev_get_platdata(dev);
+ struct pcf2123_data *pcf2123 = dev_get_drvdata(dev);
int ret, val;
unsigned int reg;
- ret = regmap_read(pdata->map, PCF2123_REG_OFFSET, &reg);
+ ret = regmap_read(pcf2123->map, PCF2123_REG_OFFSET, &reg);
if (ret)
return ret;
@@ -149,7 +149,7 @@ static int pcf2123_read_offset(struct device *dev, long *offset)
*/
static int pcf2123_set_offset(struct device *dev, long offset)
{
- struct pcf2123_plat_data *pdata = dev_get_platdata(dev);
+ struct pcf2123_data *pcf2123 = dev_get_drvdata(dev);
s8 reg;
if (offset > OFFSET_STEP * 127)
@@ -169,16 +169,16 @@ static int pcf2123_set_offset(struct device *dev, long offset)
reg |= OFFSET_COARSE;
}
- return regmap_write(pdata->map, PCF2123_REG_OFFSET, (unsigned int)reg);
+ return regmap_write(pcf2123->map, PCF2123_REG_OFFSET, (unsigned int)reg);
}
static int pcf2123_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
- struct pcf2123_plat_data *pdata = dev_get_platdata(dev);
+ struct pcf2123_data *pcf2123 = dev_get_drvdata(dev);
u8 rxbuf[7];
int ret;
- ret = regmap_bulk_read(pdata->map, PCF2123_REG_SC, rxbuf,
+ ret = regmap_bulk_read(pcf2123->map, PCF2123_REG_SC, rxbuf,
sizeof(rxbuf));
if (ret)
return ret;
@@ -194,9 +194,7 @@ static int pcf2123_rtc_read_time(struct device *dev, struct rtc_time *tm)
tm->tm_mday = bcd2bin(rxbuf[3] & 0x3F);
tm->tm_wday = rxbuf[4] & 0x07;
tm->tm_mon = bcd2bin(rxbuf[5] & 0x1F) - 1; /* rtc mn 1-12 */
- tm->tm_year = bcd2bin(rxbuf[6]);
- if (tm->tm_year < 70)
- tm->tm_year += 100; /* assume we are in 1970...2069 */
+ tm->tm_year = bcd2bin(rxbuf[6]) + 100;
dev_dbg(dev, "%s: tm is %ptR\n", __func__, tm);
@@ -205,14 +203,14 @@ static int pcf2123_rtc_read_time(struct device *dev, struct rtc_time *tm)
static int pcf2123_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
- struct pcf2123_plat_data *pdata = dev_get_platdata(dev);
+ struct pcf2123_data *pcf2123 = dev_get_drvdata(dev);
u8 txbuf[7];
int ret;
dev_dbg(dev, "%s: tm is %ptR\n", __func__, tm);
/* Stop the counter first */
- ret = regmap_write(pdata->map, PCF2123_REG_CTRL1, CTRL1_STOP);
+ ret = regmap_write(pcf2123->map, PCF2123_REG_CTRL1, CTRL1_STOP);
if (ret)
return ret;
@@ -223,29 +221,37 @@ static int pcf2123_rtc_set_time(struct device *dev, struct rtc_time *tm)
txbuf[3] = bin2bcd(tm->tm_mday & 0x3F);
txbuf[4] = tm->tm_wday & 0x07;
txbuf[5] = bin2bcd((tm->tm_mon + 1) & 0x1F); /* rtc mn 1-12 */
- txbuf[6] = bin2bcd(tm->tm_year < 100 ? tm->tm_year : tm->tm_year - 100);
+ txbuf[6] = bin2bcd(tm->tm_year - 100);
- ret = regmap_bulk_write(pdata->map, PCF2123_REG_SC, txbuf,
+ ret = regmap_bulk_write(pcf2123->map, PCF2123_REG_SC, txbuf,
sizeof(txbuf));
if (ret)
return ret;
/* Start the counter */
- ret = regmap_write(pdata->map, PCF2123_REG_CTRL1, CTRL1_CLEAR);
+ ret = regmap_write(pcf2123->map, PCF2123_REG_CTRL1, CTRL1_CLEAR);
if (ret)
return ret;
return 0;
}
+static int pcf2123_rtc_alarm_irq_enable(struct device *dev, unsigned int en)
+{
+ struct pcf2123_data *pcf2123 = dev_get_drvdata(dev);
+
+ return regmap_update_bits(pcf2123->map, PCF2123_REG_CTRL2, CTRL2_AIE,
+ en ? CTRL2_AIE : 0);
+}
+
static int pcf2123_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
{
- struct pcf2123_plat_data *pdata = dev_get_platdata(dev);
+ struct pcf2123_data *pcf2123 = dev_get_drvdata(dev);
u8 rxbuf[4];
int ret;
unsigned int val = 0;
- ret = regmap_bulk_read(pdata->map, PCF2123_REG_ALRM_MN, rxbuf,
+ ret = regmap_bulk_read(pcf2123->map, PCF2123_REG_ALRM_MN, rxbuf,
sizeof(rxbuf));
if (ret)
return ret;
@@ -257,7 +263,7 @@ static int pcf2123_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
dev_dbg(dev, "%s: alm is %ptR\n", __func__, &alm->time);
- ret = regmap_read(pdata->map, PCF2123_REG_CTRL2, &val);
+ ret = regmap_read(pcf2123->map, PCF2123_REG_CTRL2, &val);
if (ret)
return ret;
@@ -268,19 +274,19 @@ static int pcf2123_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
static int pcf2123_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
{
- struct pcf2123_plat_data *pdata = dev_get_platdata(dev);
+ struct pcf2123_data *pcf2123 = dev_get_drvdata(dev);
u8 txbuf[4];
int ret;
dev_dbg(dev, "%s: alm is %ptR\n", __func__, &alm->time);
- /* Ensure alarm flag is clear */
- ret = regmap_update_bits(pdata->map, PCF2123_REG_CTRL2, CTRL2_AF, 0);
+ /* Disable alarm interrupt */
+ ret = regmap_update_bits(pcf2123->map, PCF2123_REG_CTRL2, CTRL2_AIE, 0);
if (ret)
return ret;
- /* Disable alarm interrupt */
- ret = regmap_update_bits(pdata->map, PCF2123_REG_CTRL2, CTRL2_AIE, 0);
+ /* Ensure alarm flag is clear */
+ ret = regmap_update_bits(pcf2123->map, PCF2123_REG_CTRL2, CTRL2_AF, 0);
if (ret)
return ret;
@@ -288,42 +294,34 @@ static int pcf2123_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
txbuf[0] = bin2bcd(alm->time.tm_min & 0x7F);
txbuf[1] = bin2bcd(alm->time.tm_hour & 0x3F);
txbuf[2] = bin2bcd(alm->time.tm_mday & 0x3F);
- txbuf[3] = bin2bcd(alm->time.tm_wday & 0x07);
+ txbuf[3] = ALRM_DISABLE;
- ret = regmap_bulk_write(pdata->map, PCF2123_REG_ALRM_MN, txbuf,
+ ret = regmap_bulk_write(pcf2123->map, PCF2123_REG_ALRM_MN, txbuf,
sizeof(txbuf));
if (ret)
return ret;
- /* Enable alarm interrupt */
- if (alm->enabled) {
- ret = regmap_update_bits(pdata->map, PCF2123_REG_CTRL2,
- CTRL2_AIE, CTRL2_AIE);
- if (ret)
- return ret;
- }
-
- return 0;
+ return pcf2123_rtc_alarm_irq_enable(dev, alm->enabled);
}
static irqreturn_t pcf2123_rtc_irq(int irq, void *dev)
{
- struct pcf2123_plat_data *pdata = dev_get_platdata(dev);
- struct mutex *lock = &pdata->rtc->ops_lock;
+ struct pcf2123_data *pcf2123 = dev_get_drvdata(dev);
+ struct mutex *lock = &pcf2123->rtc->ops_lock;
unsigned int val = 0;
int ret = IRQ_NONE;
mutex_lock(lock);
- regmap_read(pdata->map, PCF2123_REG_CTRL2, &val);
+ regmap_read(pcf2123->map, PCF2123_REG_CTRL2, &val);
/* Alarm? */
if (val & CTRL2_AF) {
ret = IRQ_HANDLED;
/* Clear alarm flag */
- regmap_update_bits(pdata->map, PCF2123_REG_CTRL2, CTRL2_AF, 0);
+ regmap_update_bits(pcf2123->map, PCF2123_REG_CTRL2, CTRL2_AF, 0);
- rtc_update_irq(pdata->rtc, 1, RTC_IRQF | RTC_AF);
+ rtc_update_irq(pcf2123->rtc, 1, RTC_IRQF | RTC_AF);
}
mutex_unlock(lock);
@@ -333,23 +331,23 @@ static irqreturn_t pcf2123_rtc_irq(int irq, void *dev)
static int pcf2123_reset(struct device *dev)
{
- struct pcf2123_plat_data *pdata = dev_get_platdata(dev);
+ struct pcf2123_data *pcf2123 = dev_get_drvdata(dev);
int ret;
unsigned int val = 0;
- ret = regmap_write(pdata->map, PCF2123_REG_CTRL1, CTRL1_SW_RESET);
+ ret = regmap_write(pcf2123->map, PCF2123_REG_CTRL1, CTRL1_SW_RESET);
if (ret)
return ret;
/* Stop the counter */
dev_dbg(dev, "stopping RTC\n");
- ret = regmap_write(pdata->map, PCF2123_REG_CTRL1, CTRL1_STOP);
+ ret = regmap_write(pcf2123->map, PCF2123_REG_CTRL1, CTRL1_STOP);
if (ret)
return ret;
/* See if the counter was actually stopped */
dev_dbg(dev, "checking for presence of RTC\n");
- ret = regmap_read(pdata->map, PCF2123_REG_CTRL1, &val);
+ ret = regmap_read(pcf2123->map, PCF2123_REG_CTRL1, &val);
if (ret)
return ret;
@@ -358,7 +356,7 @@ static int pcf2123_reset(struct device *dev)
return -ENODEV;
/* Start the counter */
- ret = regmap_write(pdata->map, PCF2123_REG_CTRL1, CTRL1_CLEAR);
+ ret = regmap_write(pcf2123->map, PCF2123_REG_CTRL1, CTRL1_CLEAR);
if (ret)
return ret;
@@ -372,26 +370,27 @@ static const struct rtc_class_ops pcf2123_rtc_ops = {
.set_offset = pcf2123_set_offset,
.read_alarm = pcf2123_rtc_read_alarm,
.set_alarm = pcf2123_rtc_set_alarm,
+ .alarm_irq_enable = pcf2123_rtc_alarm_irq_enable,
};
static int pcf2123_probe(struct spi_device *spi)
{
struct rtc_device *rtc;
struct rtc_time tm;
- struct pcf2123_plat_data *pdata;
+ struct pcf2123_data *pcf2123;
int ret = 0;
- pdata = devm_kzalloc(&spi->dev, sizeof(struct pcf2123_plat_data),
+ pcf2123 = devm_kzalloc(&spi->dev, sizeof(struct pcf2123_data),
GFP_KERNEL);
- if (!pdata)
+ if (!pcf2123)
return -ENOMEM;
- spi->dev.platform_data = pdata;
- pdata->map = devm_regmap_init_spi(spi, &pcf2123_regmap_config);
+ dev_set_drvdata(&spi->dev, pcf2123);
- if (IS_ERR(pdata->map)) {
+ pcf2123->map = devm_regmap_init_spi(spi, &pcf2123_regmap_config);
+ if (IS_ERR(pcf2123->map)) {
dev_err(&spi->dev, "regmap init failed.\n");
- goto kfree_exit;
+ return PTR_ERR(pcf2123->map);
}
ret = pcf2123_rtc_read_time(&spi->dev, &tm);
@@ -399,7 +398,7 @@ static int pcf2123_probe(struct spi_device *spi)
ret = pcf2123_reset(&spi->dev);
if (ret < 0) {
dev_err(&spi->dev, "chip not found\n");
- goto kfree_exit;
+ return ret;
}
}
@@ -407,16 +406,11 @@ static int pcf2123_probe(struct spi_device *spi)
(spi->max_speed_hz + 500) / 1000);
/* Finalize the initialization */
- rtc = devm_rtc_device_register(&spi->dev, pcf2123_driver.driver.name,
- &pcf2123_rtc_ops, THIS_MODULE);
-
- if (IS_ERR(rtc)) {
- dev_err(&spi->dev, "failed to register.\n");
- ret = PTR_ERR(rtc);
- goto kfree_exit;
- }
+ rtc = devm_rtc_allocate_device(&spi->dev);
+ if (IS_ERR(rtc))
+ return PTR_ERR(rtc);
- pdata->rtc = rtc;
+ pcf2123->rtc = rtc;
/* Register alarm irq */
if (spi->irq > 0) {
@@ -434,19 +428,25 @@ static int pcf2123_probe(struct spi_device *spi)
* support to this driver to generate interrupts more than once
* per minute.
*/
- pdata->rtc->uie_unsupported = 1;
+ rtc->uie_unsupported = 1;
+ rtc->ops = &pcf2123_rtc_ops;
+ rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
+ rtc->range_max = RTC_TIMESTAMP_END_2099;
+ rtc->set_start_time = true;
- return 0;
+ ret = rtc_register_device(rtc);
+ if (ret)
+ return ret;
-kfree_exit:
- spi->dev.platform_data = NULL;
- return ret;
+ return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id pcf2123_dt_ids[] = {
- { .compatible = "nxp,rtc-pcf2123", },
+ { .compatible = "nxp,pcf2123", },
{ .compatible = "microcrystal,rv2123", },
+ /* Deprecated, do not use */
+ { .compatible = "nxp,rtc-pcf2123", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, pcf2123_dt_ids);
generated by cgit v1.2.3 (git 2.39.1) at 2025-02-04 15:14:43 +0100