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-rw-r--r--drivers/rtc/Kconfig3
-rw-r--r--drivers/rtc/interface.c2
-rw-r--r--drivers/rtc/rtc-ds1307.c129
-rw-r--r--drivers/rtc/rtc-ds2404.c5
-rw-r--r--drivers/rtc/rtc-fm3130.c8
-rw-r--r--drivers/rtc/rtc-imx-sc.c87
-rw-r--r--drivers/rtc/rtc-m41t80.c2
-rw-r--r--drivers/rtc/rtc-pcf2123.c354
-rw-r--r--drivers/rtc/rtc-pcf8563.c13
-rw-r--r--drivers/rtc/rtc-rv8803.c2
-rw-r--r--drivers/rtc/rtc-rx8010.c2
-rw-r--r--drivers/rtc/rtc-rx8025.c2
-rw-r--r--drivers/rtc/rtc-s35390a.c55
-rw-r--r--drivers/rtc/rtc-st-lpc.c4
-rw-r--r--drivers/rtc/rtc-stm32.c6
-rw-r--r--drivers/rtc/rtc-sun6i.c1
-rw-r--r--drivers/rtc/rtc-tegra.c253
-rw-r--r--drivers/rtc/rtc-test.c1
-rw-r--r--drivers/rtc/rtc-tps65910.c2
-rw-r--r--drivers/rtc/rtc-wm831x.c3
20 files changed, 501 insertions, 433 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 3254a30ebb1b..e72f65b61176 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -562,7 +562,7 @@ config RTC_DRV_TPS6586X
config RTC_DRV_TPS65910
tristate "TI TPS65910 RTC driver"
- depends on RTC_CLASS && MFD_TPS65910
+ depends on MFD_TPS65910
help
If you say yes here you get support for the RTC on the
TPS65910 chips.
@@ -820,6 +820,7 @@ config RTC_DRV_MAX6902
config RTC_DRV_PCF2123
tristate "NXP PCF2123"
+ select REGMAP_SPI
help
If you say yes here you get support for the NXP PCF2123
RTC chip.
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index 4124f4dd376b..72b7ddc43116 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -633,7 +633,7 @@ enum hrtimer_restart rtc_pie_update_irq(struct hrtimer *timer)
{
struct rtc_device *rtc;
ktime_t period;
- int count;
+ u64 count;
rtc = container_of(timer, struct rtc_device, pie_timer);
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 93d338e7732b..1f7e8aefc1eb 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -222,6 +222,45 @@ static int ds1307_get_time(struct device *dev, struct rtc_time *t)
return -EINVAL;
}
+ tmp = regs[DS1307_REG_SECS];
+ switch (ds1307->type) {
+ case ds_1307:
+ case m41t0:
+ case m41t00:
+ case m41t11:
+ if (tmp & DS1307_BIT_CH)
+ return -EINVAL;
+ break;
+ case ds_1308:
+ case ds_1338:
+ if (tmp & DS1307_BIT_CH)
+ return -EINVAL;
+
+ ret = regmap_read(ds1307->regmap, DS1307_REG_CONTROL, &tmp);
+ if (ret)
+ return ret;
+ if (tmp & DS1338_BIT_OSF)
+ return -EINVAL;
+ break;
+ case ds_1340:
+ if (tmp & DS1340_BIT_nEOSC)
+ return -EINVAL;
+
+ ret = regmap_read(ds1307->regmap, DS1340_REG_FLAG, &tmp);
+ if (ret)
+ return ret;
+ if (tmp & DS1340_BIT_OSF)
+ return -EINVAL;
+ break;
+ case mcp794xx:
+ if (!(tmp & MCP794XX_BIT_ST))
+ return -EINVAL;
+
+ break;
+ default:
+ break;
+ }
+
t->tm_sec = bcd2bin(regs[DS1307_REG_SECS] & 0x7f);
t->tm_min = bcd2bin(regs[DS1307_REG_MIN] & 0x7f);
tmp = regs[DS1307_REG_HOUR] & 0x3f;
@@ -286,7 +325,17 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t)
if (t->tm_year > 199 && chip->century_bit)
regs[chip->century_reg] |= chip->century_bit;
- if (ds1307->type == mcp794xx) {
+ switch (ds1307->type) {
+ case ds_1308:
+ case ds_1338:
+ regmap_update_bits(ds1307->regmap, DS1307_REG_CONTROL,
+ DS1338_BIT_OSF, 0);
+ break;
+ case ds_1340:
+ regmap_update_bits(ds1307->regmap, DS1340_REG_FLAG,
+ DS1340_BIT_OSF, 0);
+ break;
+ case mcp794xx:
/*
* these bits were cleared when preparing the date/time
* values and need to be set again before writing the
@@ -294,6 +343,9 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t)
*/
regs[DS1307_REG_SECS] |= MCP794XX_BIT_ST;
regs[DS1307_REG_WDAY] |= MCP794XX_BIT_VBATEN;
+ break;
+ default:
+ break;
}
dev_dbg(dev, "%s: %7ph\n", "write", regs);
@@ -1702,7 +1754,6 @@ static int ds1307_probe(struct i2c_client *client,
break;
}
-read_rtc:
/* read RTC registers */
err = regmap_bulk_read(ds1307->regmap, chip->offset, regs,
sizeof(regs));
@@ -1711,75 +1762,11 @@ read_rtc:
goto exit;
}
- /*
- * minimal sanity checking; some chips (like DS1340) don't
- * specify the extra bits as must-be-zero, but there are
- * still a few values that are clearly out-of-range.
- */
- tmp = regs[DS1307_REG_SECS];
- switch (ds1307->type) {
- case ds_1307:
- case m41t0:
- case m41t00:
- case m41t11:
- /* clock halted? turn it on, so clock can tick. */
- if (tmp & DS1307_BIT_CH) {
- regmap_write(ds1307->regmap, DS1307_REG_SECS, 0);
- dev_warn(ds1307->dev, "SET TIME!\n");
- goto read_rtc;
- }
- break;
- case ds_1308:
- case ds_1338:
- /* clock halted? turn it on, so clock can tick. */
- if (tmp & DS1307_BIT_CH)
- regmap_write(ds1307->regmap, DS1307_REG_SECS, 0);
-
- /* oscillator fault? clear flag, and warn */
- if (regs[DS1307_REG_CONTROL] & DS1338_BIT_OSF) {
- regmap_write(ds1307->regmap, DS1307_REG_CONTROL,
- regs[DS1307_REG_CONTROL] &
- ~DS1338_BIT_OSF);
- dev_warn(ds1307->dev, "SET TIME!\n");
- goto read_rtc;
- }
- break;
- case ds_1340:
- /* clock halted? turn it on, so clock can tick. */
- if (tmp & DS1340_BIT_nEOSC)
- regmap_write(ds1307->regmap, DS1307_REG_SECS, 0);
-
- err = regmap_read(ds1307->regmap, DS1340_REG_FLAG, &tmp);
- if (err) {
- dev_dbg(ds1307->dev, "read error %d\n", err);
- goto exit;
- }
-
- /* oscillator fault? clear flag, and warn */
- if (tmp & DS1340_BIT_OSF) {
- regmap_write(ds1307->regmap, DS1340_REG_FLAG, 0);
- dev_warn(ds1307->dev, "SET TIME!\n");
- }
- break;
- case mcp794xx:
- /* make sure that the backup battery is enabled */
- if (!(regs[DS1307_REG_WDAY] & MCP794XX_BIT_VBATEN)) {
- regmap_write(ds1307->regmap, DS1307_REG_WDAY,
- regs[DS1307_REG_WDAY] |
- MCP794XX_BIT_VBATEN);
- }
-
- /* clock halted? turn it on, so clock can tick. */
- if (!(tmp & MCP794XX_BIT_ST)) {
- regmap_write(ds1307->regmap, DS1307_REG_SECS,
- MCP794XX_BIT_ST);
- dev_warn(ds1307->dev, "SET TIME!\n");
- goto read_rtc;
- }
-
- break;
- default:
- break;
+ if (ds1307->type == mcp794xx &&
+ !(regs[DS1307_REG_WDAY] & MCP794XX_BIT_VBATEN)) {
+ regmap_write(ds1307->regmap, DS1307_REG_WDAY,
+ regs[DS1307_REG_WDAY] |
+ MCP794XX_BIT_VBATEN);
}
tmp = regs[DS1307_REG_HOUR];
diff --git a/drivers/rtc/rtc-ds2404.c b/drivers/rtc/rtc-ds2404.c
index 1e9f429ada64..9df0c44512b8 100644
--- a/drivers/rtc/rtc-ds2404.c
+++ b/drivers/rtc/rtc-ds2404.c
@@ -182,9 +182,10 @@ static void ds2404_enable_osc(struct device *dev)
static int ds2404_read_time(struct device *dev, struct rtc_time *dt)
{
unsigned long time = 0;
+ __le32 hw_time = 0;
- ds2404_read_memory(dev, 0x203, 4, (u8 *)&time);
- time = le32_to_cpu(time);
+ ds2404_read_memory(dev, 0x203, 4, (u8 *)&hw_time);
+ time = le32_to_cpu(hw_time);
rtc_time64_to_tm(time, dt);
return 0;
diff --git a/drivers/rtc/rtc-fm3130.c b/drivers/rtc/rtc-fm3130.c
index 1caa21b82c7d..677ec2da13d8 100644
--- a/drivers/rtc/rtc-fm3130.c
+++ b/drivers/rtc/rtc-fm3130.c
@@ -104,8 +104,7 @@ static int fm3130_get_time(struct device *dev, struct rtc_time *t)
fm3130_rtc_mode(dev, FM3130_MODE_READ);
/* read the RTC date and time registers all at once */
- tmp = i2c_transfer(to_i2c_adapter(fm3130->client->dev.parent),
- fm3130->msg, 2);
+ tmp = i2c_transfer(fm3130->client->adapter, fm3130->msg, 2);
if (tmp != 2) {
dev_err(dev, "%s error %d\n", "read", tmp);
return -EIO;
@@ -197,8 +196,7 @@ static int fm3130_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
}
/* read the RTC alarm registers all at once */
- tmp = i2c_transfer(to_i2c_adapter(fm3130->client->dev.parent),
- &fm3130->msg[2], 2);
+ tmp = i2c_transfer(fm3130->client->adapter, &fm3130->msg[2], 2);
if (tmp != 2) {
dev_err(dev, "%s error %d\n", "read", tmp);
return -EIO;
@@ -348,7 +346,7 @@ static int fm3130_probe(struct i2c_client *client,
struct fm3130 *fm3130;
int err = -ENODEV;
int tmp;
- struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ struct i2c_adapter *adapter = client->adapter;
if (!i2c_check_functionality(adapter,
I2C_FUNC_I2C | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
diff --git a/drivers/rtc/rtc-imx-sc.c b/drivers/rtc/rtc-imx-sc.c
index 19642bfd913a..c933045fe04b 100644
--- a/drivers/rtc/rtc-imx-sc.c
+++ b/drivers/rtc/rtc-imx-sc.c
@@ -3,6 +3,7 @@
* Copyright 2018 NXP.
*/
+#include <dt-bindings/firmware/imx/rsrc.h>
#include <linux/arm-smccc.h>
#include <linux/firmware/imx/sci.h>
#include <linux/module.h>
@@ -11,11 +12,15 @@
#include <linux/rtc.h>
#define IMX_SC_TIMER_FUNC_GET_RTC_SEC1970 9
+#define IMX_SC_TIMER_FUNC_SET_RTC_ALARM 8
#define IMX_SC_TIMER_FUNC_SET_RTC_TIME 6
#define IMX_SIP_SRTC 0xC2000002
#define IMX_SIP_SRTC_SET_TIME 0x0
+#define SC_IRQ_GROUP_RTC 2
+#define SC_IRQ_RTC 1
+
static struct imx_sc_ipc *rtc_ipc_handle;
static struct rtc_device *imx_sc_rtc;
@@ -24,6 +29,16 @@ struct imx_sc_msg_timer_get_rtc_time {
u32 time;
} __packed;
+struct imx_sc_msg_timer_rtc_set_alarm {
+ struct imx_sc_rpc_msg hdr;
+ u16 year;
+ u8 mon;
+ u8 day;
+ u8 hour;
+ u8 min;
+ u8 sec;
+} __packed;
+
static int imx_sc_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
struct imx_sc_msg_timer_get_rtc_time msg;
@@ -60,9 +75,77 @@ static int imx_sc_rtc_set_time(struct device *dev, struct rtc_time *tm)
return res.a0;
}
+static int imx_sc_rtc_alarm_irq_enable(struct device *dev, unsigned int enable)
+{
+ return imx_scu_irq_group_enable(SC_IRQ_GROUP_RTC, SC_IRQ_RTC, enable);
+}
+
+static int imx_sc_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ /*
+ * SCU firmware does NOT provide read alarm API, but .read_alarm
+ * callback is required by RTC framework to support alarm function,
+ * so just return here.
+ */
+ return 0;
+}
+
+static int imx_sc_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct imx_sc_msg_timer_rtc_set_alarm msg;
+ struct imx_sc_rpc_msg *hdr = &msg.hdr;
+ int ret;
+ struct rtc_time *alrm_tm = &alrm->time;
+
+ hdr->ver = IMX_SC_RPC_VERSION;
+ hdr->svc = IMX_SC_RPC_SVC_TIMER;
+ hdr->func = IMX_SC_TIMER_FUNC_SET_RTC_ALARM;
+ hdr->size = 3;
+
+ msg.year = alrm_tm->tm_year + 1900;
+ msg.mon = alrm_tm->tm_mon + 1;
+ msg.day = alrm_tm->tm_mday;
+ msg.hour = alrm_tm->tm_hour;
+ msg.min = alrm_tm->tm_min;
+ msg.sec = alrm_tm->tm_sec;
+
+ ret = imx_scu_call_rpc(rtc_ipc_handle, &msg, true);
+ if (ret) {
+ dev_err(dev, "set rtc alarm failed, ret %d\n", ret);
+ return ret;
+ }
+
+ ret = imx_sc_rtc_alarm_irq_enable(dev, alrm->enabled);
+ if (ret) {
+ dev_err(dev, "enable rtc alarm failed, ret %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
static const struct rtc_class_ops imx_sc_rtc_ops = {
.read_time = imx_sc_rtc_read_time,
.set_time = imx_sc_rtc_set_time,
+ .read_alarm = imx_sc_rtc_read_alarm,
+ .set_alarm = imx_sc_rtc_set_alarm,
+ .alarm_irq_enable = imx_sc_rtc_alarm_irq_enable,
+};
+
+static int imx_sc_rtc_alarm_notify(struct notifier_block *nb,
+ unsigned long event, void *group)
+{
+ /* ignore non-rtc irq */
+ if (!((event & SC_IRQ_RTC) && (*(u8 *)group == SC_IRQ_GROUP_RTC)))
+ return 0;
+
+ rtc_update_irq(imx_sc_rtc, 1, RTC_IRQF | RTC_AF);
+
+ return 0;
+}
+
+static struct notifier_block imx_sc_rtc_alarm_sc_notifier = {
+ .notifier_call = imx_sc_rtc_alarm_notify,
};
static int imx_sc_rtc_probe(struct platform_device *pdev)
@@ -73,6 +156,8 @@ static int imx_sc_rtc_probe(struct platform_device *pdev)
if (ret)
return ret;
+ device_init_wakeup(&pdev->dev, true);
+
imx_sc_rtc = devm_rtc_allocate_device(&pdev->dev);
if (IS_ERR(imx_sc_rtc))
return PTR_ERR(imx_sc_rtc);
@@ -87,6 +172,8 @@ static int imx_sc_rtc_probe(struct platform_device *pdev)
return ret;
}
+ imx_scu_irq_register_notifier(&imx_sc_rtc_alarm_sc_notifier);
+
return 0;
}
diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index 9fdc284c943b..5f46f85f814b 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -872,7 +872,7 @@ static struct notifier_block wdt_notifier = {
static int m41t80_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ struct i2c_adapter *adapter = client->adapter;
int rc = 0;
struct rtc_time tm;
struct m41t80_data *m41t80_data = NULL;
diff --git a/drivers/rtc/rtc-pcf2123.c b/drivers/rtc/rtc-pcf2123.c
index f431263e2d39..fb542a930bf0 100644
--- a/drivers/rtc/rtc-pcf2123.c
+++ b/drivers/rtc/rtc-pcf2123.c
@@ -40,7 +40,7 @@
#include <linux/rtc.h>
#include <linux/spi/spi.h>
#include <linux/module.h>
-#include <linux/sysfs.h>
+#include <linux/regmap.h>
/* REGISTERS */
#define PCF2123_REG_CTRL1 (0x00) /* Control Register 1 */
@@ -95,6 +95,7 @@
#define OFFSET_SIGN_BIT 6 /* 2's complement sign bit */
#define OFFSET_COARSE BIT(7) /* Coarse mode offset */
#define OFFSET_STEP (2170) /* Offset step in parts per billion */
+#define OFFSET_MASK GENMASK(6, 0) /* Offset value */
/* READ/WRITE ADDRESS BITS */
#define PCF2123_WRITE BIT(4)
@@ -103,120 +104,35 @@
static struct spi_driver pcf2123_driver;
-struct pcf2123_sysfs_reg {
- struct device_attribute attr;
- char name[2];
-};
-
struct pcf2123_plat_data {
struct rtc_device *rtc;
- struct pcf2123_sysfs_reg regs[16];
+ struct regmap *map;
};
-/*
- * Causes a 30 nanosecond delay to ensure that the PCF2123 chip select
- * is released properly after an SPI write. This function should be
- * called after EVERY read/write call over SPI.
- */
-static inline void pcf2123_delay_trec(void)
-{
- ndelay(30);
-}
-
-static int pcf2123_read(struct device *dev, u8 reg, u8 *rxbuf, size_t size)
-{
- struct spi_device *spi = to_spi_device(dev);
- int ret;
-
- reg |= PCF2123_READ;
- ret = spi_write_then_read(spi, &reg, 1, rxbuf, size);
- pcf2123_delay_trec();
-
- return ret;
-}
-
-static int pcf2123_write(struct device *dev, u8 *txbuf, size_t size)
-{
- struct spi_device *spi = to_spi_device(dev);
- int ret;
-
- txbuf[0] |= PCF2123_WRITE;
- ret = spi_write(spi, txbuf, size);
- pcf2123_delay_trec();
-
- return ret;
-}
-
-static int pcf2123_write_reg(struct device *dev, u8 reg, u8 val)
-{
- u8 txbuf[2];
-
- txbuf[0] = reg;
- txbuf[1] = val;
- return pcf2123_write(dev, txbuf, sizeof(txbuf));
-}
-
-static ssize_t pcf2123_show(struct device *dev, struct device_attribute *attr,
- char *buffer)
-{
- struct pcf2123_sysfs_reg *r;
- u8 rxbuf[1];
- unsigned long reg;
- int ret;
-
- r = container_of(attr, struct pcf2123_sysfs_reg, attr);
-
- ret = kstrtoul(r->name, 16, &reg);
- if (ret)
- return ret;
-
- ret = pcf2123_read(dev, reg, rxbuf, 1);
- if (ret < 0)
- return -EIO;
-
- return sprintf(buffer, "0x%x\n", rxbuf[0]);
-}
+static const struct regmap_config pcf2123_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .read_flag_mask = PCF2123_READ,
+ .write_flag_mask = PCF2123_WRITE,
+ .max_register = PCF2123_REG_CTDWN_TMR,
+};
-static ssize_t pcf2123_store(struct device *dev, struct device_attribute *attr,
- const char *buffer, size_t count)
+static int pcf2123_read_offset(struct device *dev, long *offset)
{
- struct pcf2123_sysfs_reg *r;
- unsigned long reg;
- unsigned long val;
-
- int ret;
+ struct pcf2123_plat_data *pdata = dev_get_platdata(dev);
+ int ret, val;
+ unsigned int reg;
- r = container_of(attr, struct pcf2123_sysfs_reg, attr);
-
- ret = kstrtoul(r->name, 16, &reg);
+ ret = regmap_read(pdata->map, PCF2123_REG_OFFSET, &reg);
if (ret)
return ret;
- ret = kstrtoul(buffer, 10, &val);
- if (ret)
- return ret;
-
- ret = pcf2123_write_reg(dev, reg, val);
- if (ret < 0)
- return -EIO;
- return count;
-}
-
-static int pcf2123_read_offset(struct device *dev, long *offset)
-{
- int ret;
- s8 reg;
-
- ret = pcf2123_read(dev, PCF2123_REG_OFFSET, &reg, 1);
- if (ret < 0)
- return ret;
+ val = sign_extend32((reg & OFFSET_MASK), OFFSET_SIGN_BIT);
if (reg & OFFSET_COARSE)
- reg <<= 1; /* multiply by 2 and sign extend */
- else
- reg = sign_extend32(reg, OFFSET_SIGN_BIT);
+ val *= 2;
- *offset = ((long)reg) * OFFSET_STEP;
+ *offset = ((long)val) * OFFSET_STEP;
return 0;
}
@@ -233,6 +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);
s8 reg;
if (offset > OFFSET_STEP * 127)
@@ -240,7 +157,7 @@ static int pcf2123_set_offset(struct device *dev, long offset)
else if (offset < OFFSET_STEP * -128)
reg = -128;
else
- reg = (s8)((offset + (OFFSET_STEP >> 1)) / OFFSET_STEP);
+ reg = DIV_ROUND_CLOSEST(offset, OFFSET_STEP);
/* choose fine offset only for odd values in the normal range */
if (reg & 1 && reg <= 63 && reg >= -64) {
@@ -252,16 +169,18 @@ static int pcf2123_set_offset(struct device *dev, long offset)
reg |= OFFSET_COARSE;
}
- return pcf2123_write_reg(dev, PCF2123_REG_OFFSET, reg);
+ return regmap_write(pdata->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);
u8 rxbuf[7];
int ret;
- ret = pcf2123_read(dev, PCF2123_REG_SC, rxbuf, sizeof(rxbuf));
- if (ret < 0)
+ ret = regmap_bulk_read(pdata->map, PCF2123_REG_SC, rxbuf,
+ sizeof(rxbuf));
+ if (ret)
return ret;
if (rxbuf[0] & OSC_HAS_STOPPED) {
@@ -279,82 +198,168 @@ static int pcf2123_rtc_read_time(struct device *dev, struct rtc_time *tm)
if (tm->tm_year < 70)
tm->tm_year += 100; /* assume we are in 1970...2069 */
- dev_dbg(dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
- "mday=%d, mon=%d, year=%d, wday=%d\n",
- __func__,
- tm->tm_sec, tm->tm_min, tm->tm_hour,
- tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
+ dev_dbg(dev, "%s: tm is %ptR\n", __func__, tm);
return 0;
}
static int pcf2123_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
- u8 txbuf[8];
+ struct pcf2123_plat_data *pdata = dev_get_platdata(dev);
+ u8 txbuf[7];
int ret;
- dev_dbg(dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
- "mday=%d, mon=%d, year=%d, wday=%d\n",
- __func__,
- tm->tm_sec, tm->tm_min, tm->tm_hour,
- tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
+ dev_dbg(dev, "%s: tm is %ptR\n", __func__, tm);
/* Stop the counter first */
- ret = pcf2123_write_reg(dev, PCF2123_REG_CTRL1, CTRL1_STOP);
- if (ret < 0)
+ ret = regmap_write(pdata->map, PCF2123_REG_CTRL1, CTRL1_STOP);
+ if (ret)
return ret;
/* Set the new time */
- txbuf[0] = PCF2123_REG_SC;
- txbuf[1] = bin2bcd(tm->tm_sec & 0x7F);
- txbuf[2] = bin2bcd(tm->tm_min & 0x7F);
- txbuf[3] = bin2bcd(tm->tm_hour & 0x3F);
- txbuf[4] = bin2bcd(tm->tm_mday & 0x3F);
- txbuf[5] = tm->tm_wday & 0x07;
- txbuf[6] = bin2bcd((tm->tm_mon + 1) & 0x1F); /* rtc mn 1-12 */
- txbuf[7] = bin2bcd(tm->tm_year < 100 ? tm->tm_year : tm->tm_year - 100);
-
- ret = pcf2123_write(dev, txbuf, sizeof(txbuf));
- if (ret < 0)
+ txbuf[0] = bin2bcd(tm->tm_sec & 0x7F);
+ txbuf[1] = bin2bcd(tm->tm_min & 0x7F);
+ txbuf[2] = bin2bcd(tm->tm_hour & 0x3F);
+ 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);
+
+ ret = regmap_bulk_write(pdata->map, PCF2123_REG_SC, txbuf,
+ sizeof(txbuf));
+ if (ret)
return ret;
/* Start the counter */
- ret = pcf2123_write_reg(dev, PCF2123_REG_CTRL1, CTRL1_CLEAR);
- if (ret < 0)
+ ret = regmap_write(pdata->map, PCF2123_REG_CTRL1, CTRL1_CLEAR);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int pcf2123_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
+{
+ struct pcf2123_plat_data *pdata = dev_get_platdata(dev);
+ u8 rxbuf[4];
+ int ret;
+ unsigned int val = 0;
+
+ ret = regmap_bulk_read(pdata->map, PCF2123_REG_ALRM_MN, rxbuf,
+ sizeof(rxbuf));
+ if (ret)
+ return ret;
+
+ alm->time.tm_min = bcd2bin(rxbuf[0] & 0x7F);
+ alm->time.tm_hour = bcd2bin(rxbuf[1] & 0x3F);
+ alm->time.tm_mday = bcd2bin(rxbuf[2] & 0x3F);
+ alm->time.tm_wday = bcd2bin(rxbuf[3] & 0x07);
+
+ dev_dbg(dev, "%s: alm is %ptR\n", __func__, &alm->time);
+
+ ret = regmap_read(pdata->map, PCF2123_REG_CTRL2, &val);
+ if (ret)
+ return ret;
+
+ alm->enabled = !!(val & CTRL2_AIE);
+
+ return 0;
+}
+
+static int pcf2123_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
+{
+ struct pcf2123_plat_data *pdata = dev_get_platdata(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);
+ if (ret)
return ret;
+ /* Disable alarm interrupt */
+ ret = regmap_update_bits(pdata->map, PCF2123_REG_CTRL2, CTRL2_AIE, 0);
+ if (ret)
+ return ret;
+
+ /* Set new alarm */
+ 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);
+
+ ret = regmap_bulk_write(pdata->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;
}
+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;
+ unsigned int val = 0;
+ int ret = IRQ_NONE;
+
+ mutex_lock(lock);
+ regmap_read(pdata->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);
+
+ rtc_update_irq(pdata->rtc, 1, RTC_IRQF | RTC_AF);
+ }
+
+ mutex_unlock(lock);
+
+ return ret;
+}
+
static int pcf2123_reset(struct device *dev)
{
+ struct pcf2123_plat_data *pdata = dev_get_platdata(dev);
int ret;
- u8 rxbuf[2];
+ unsigned int val = 0;
- ret = pcf2123_write_reg(dev, PCF2123_REG_CTRL1, CTRL1_SW_RESET);
- if (ret < 0)
+ ret = regmap_write(pdata->map, PCF2123_REG_CTRL1, CTRL1_SW_RESET);
+ if (ret)
return ret;
/* Stop the counter */
dev_dbg(dev, "stopping RTC\n");
- ret = pcf2123_write_reg(dev, PCF2123_REG_CTRL1, CTRL1_STOP);
- if (ret < 0)
+ ret = regmap_write(pdata->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 = pcf2123_read(dev, PCF2123_REG_CTRL1, rxbuf, sizeof(rxbuf));
- if (ret < 0)
+ ret = regmap_read(pdata->map, PCF2123_REG_CTRL1, &val);
+ if (ret)
return ret;
- dev_dbg(dev, "received data from RTC (0x%02X 0x%02X)\n",
- rxbuf[0], rxbuf[1]);
- if (!(rxbuf[0] & CTRL1_STOP))
+ dev_dbg(dev, "received data from RTC (0x%08X)\n", val);
+ if (!(val & CTRL1_STOP))
return -ENODEV;
/* Start the counter */
- ret = pcf2123_write_reg(dev, PCF2123_REG_CTRL1, CTRL1_CLEAR);
- if (ret < 0)
+ ret = regmap_write(pdata->map, PCF2123_REG_CTRL1, CTRL1_CLEAR);
+ if (ret)
return ret;
return 0;
@@ -365,7 +370,8 @@ static const struct rtc_class_ops pcf2123_rtc_ops = {
.set_time = pcf2123_rtc_set_time,
.read_offset = pcf2123_read_offset,
.set_offset = pcf2123_set_offset,
-
+ .read_alarm = pcf2123_rtc_read_alarm,
+ .set_alarm = pcf2123_rtc_set_alarm,
};
static int pcf2123_probe(struct spi_device *spi)
@@ -373,7 +379,7 @@ static int pcf2123_probe(struct spi_device *spi)
struct rtc_device *rtc;
struct rtc_time tm;
struct pcf2123_plat_data *pdata;
- int ret, i;
+ int ret = 0;
pdata = devm_kzalloc(&spi->dev, sizeof(struct pcf2123_plat_data),
GFP_KERNEL);
@@ -381,6 +387,13 @@ static int pcf2123_probe(struct spi_device *spi)
return -ENOMEM;
spi->dev.platform_data = pdata;
+ pdata->map = devm_regmap_init_spi(spi, &pcf2123_regmap_config);
+
+ if (IS_ERR(pdata->map)) {
+ dev_err(&spi->dev, "regmap init failed.\n");
+ goto kfree_exit;
+ }
+
ret = pcf2123_rtc_read_time(&spi->dev, &tm);
if (ret < 0) {
ret = pcf2123_reset(&spi->dev);
@@ -405,47 +418,31 @@ static int pcf2123_probe(struct spi_device *spi)
pdata->rtc = rtc;
- for (i = 0; i < 16; i++) {
- sysfs_attr_init(&pdata->regs[i].attr.attr);
- sprintf(pdata->regs[i].name, "%1x", i);
- pdata->regs[i].attr.attr.mode = S_IRUGO | S_IWUSR;
- pdata->regs[i].attr.attr.name = pdata->regs[i].name;
- pdata->regs[i].attr.show = pcf2123_show;
- pdata->regs[i].attr.store = pcf2123_store;
- ret = device_create_file(&spi->dev, &pdata->regs[i].attr);
- if (ret) {
- dev_err(&spi->dev, "Unable to create sysfs %s\n",
- pdata->regs[i].name);
- goto sysfs_exit;
- }
+ /* Register alarm irq */
+ if (spi->irq > 0) {
+ ret = devm_request_threaded_irq(&spi->dev, spi->irq, NULL,
+ pcf2123_rtc_irq,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ pcf2123_driver.driver.name, &spi->dev);
+ if (!ret)
+ device_init_wakeup(&spi->dev, true);
+ else
+ dev_err(&spi->dev, "could not request irq.\n");
}
- return 0;
+ /* The PCF2123's alarm only has minute accuracy. Must add timer
+ * support to this driver to generate interrupts more than once
+ * per minute.
+ */
+ pdata->rtc->uie_unsupported = 1;
-sysfs_exit:
- for (i--; i >= 0; i--)
- device_remove_file(&spi->dev, &pdata->regs[i].attr);
+ return 0;
kfree_exit:
spi->dev.platform_data = NULL;
return ret;
}
-static int pcf2123_remove(struct spi_device *spi)
-{
- struct pcf2123_plat_data *pdata = dev_get_platdata(&spi->dev);
- int i;
-
- if (pdata) {
- for (i = 0; i < 16; i++)
- if (pdata->regs[i].name[0])
- device_remove_file(&spi->dev,
- &pdata->regs[i].attr);
- }
-
- return 0;
-}
-
#ifdef CONFIG_OF
static const struct of_device_id pcf2123_dt_ids[] = {
{ .compatible = "nxp,rtc-pcf2123", },
@@ -461,7 +458,6 @@ static struct spi_driver pcf2123_driver = {
.of_match_table = of_match_ptr(pcf2123_dt_ids),
},
.probe = pcf2123_probe,
- .remove = pcf2123_remove,
};
module_spi_driver(pcf2123_driver);
diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
index c569dfe8c2ae..ac159d24286d 100644
--- a/drivers/rtc/rtc-pcf8563.c
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -560,7 +560,6 @@ static int pcf8563_probe(struct i2c_client *client,
struct pcf8563 *pcf8563;
int err;
unsigned char buf;
- unsigned char alm_pending;
dev_dbg(&client->dev, "%s\n", __func__);
@@ -584,13 +583,13 @@ static int pcf8563_probe(struct i2c_client *client,
return err;
}
- err = pcf8563_get_alarm_mode(client, NULL, &alm_pending);
- if (err) {
- dev_err(&client->dev, "%s: read error\n", __func__);
+ /* Clear flags and disable interrupts */
+ buf = 0;
+ err = pcf8563_write_block_data(client, PCF8563_REG_ST2, 1, &buf);
+ if (err < 0) {
+ dev_err(&client->dev, "%s: write error\n", __func__);
return err;
}
- if (alm_pending)
- pcf8563_set_alarm_mode(client, 0);
pcf8563->rtc = devm_rtc_device_register(&client->dev,
pcf8563_driver.driver.name,
@@ -602,7 +601,7 @@ static int pcf8563_probe(struct i2c_client *client,
if (client->irq > 0) {
err = devm_request_threaded_irq(&client->dev, client->irq,
NULL, pcf8563_irq,
- IRQF_SHARED|IRQF_ONESHOT|IRQF_TRIGGER_FALLING,
+ IRQF_SHARED | IRQF_ONESHOT | IRQF_TRIGGER_LOW,
pcf8563_driver.driver.name, client);
if (err) {
dev_err(&client->dev, "unable to request IRQ %d\n",
diff --git a/drivers/rtc/rtc-rv8803.c b/drivers/rtc/rtc-rv8803.c
index 0b102c3cf5a4..fc5243400108 100644
--- a/drivers/rtc/rtc-rv8803.c
+++ b/drivers/rtc/rtc-rv8803.c
@@ -517,7 +517,7 @@ static int rx8900_trickle_charger_init(struct rv8803_data *rv8803)
static int rv8803_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ struct i2c_adapter *adapter = client->adapter;
struct rv8803_data *rv8803;
int err, flags;
struct nvmem_config nvmem_cfg = {
diff --git a/drivers/rtc/rtc-rx8010.c b/drivers/rtc/rtc-rx8010.c
index b15ad8e10938..8102469e27c0 100644
--- a/drivers/rtc/rtc-rx8010.c
+++ b/drivers/rtc/rtc-rx8010.c
@@ -433,7 +433,7 @@ static struct rtc_class_ops rx8010_rtc_ops = {
static int rx8010_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ struct i2c_adapter *adapter = client->adapter;
struct rx8010_data *rx8010;
int err = 0;
diff --git a/drivers/rtc/rtc-rx8025.c b/drivers/rtc/rtc-rx8025.c
index cb082ad19471..b9bda10589e0 100644
--- a/drivers/rtc/rtc-rx8025.c
+++ b/drivers/rtc/rtc-rx8025.c
@@ -501,7 +501,7 @@ static void rx8025_sysfs_unregister(struct device *dev)
static int rx8025_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ struct i2c_adapter *adapter = client->adapter;
struct rx8025_data *rx8025;
int err = 0;
diff --git a/drivers/rtc/rtc-s35390a.c b/drivers/rtc/rtc-s35390a.c
index 8c37acb4a007..84806ff763cf 100644
--- a/drivers/rtc/rtc-s35390a.c
+++ b/drivers/rtc/rtc-s35390a.c
@@ -32,21 +32,22 @@
#define S35390A_ALRM_BYTE_MINS 2
/* flags for STATUS1 */
-#define S35390A_FLAG_POC 0x01
-#define S35390A_FLAG_BLD 0x02
-#define S35390A_FLAG_INT2 0x04
-#define S35390A_FLAG_24H 0x40
-#define S35390A_FLAG_RESET 0x80
+#define S35390A_FLAG_POC BIT(0)
+#define S35390A_FLAG_BLD BIT(1)
+#define S35390A_FLAG_INT2 BIT(2)
+#define S35390A_FLAG_24H BIT(6)
+#define S35390A_FLAG_RESET BIT(7)
/* flag for STATUS2 */
-#define S35390A_FLAG_TEST 0x01
-
-#define S35390A_INT2_MODE_MASK 0xF0
+#define S35390A_FLAG_TEST BIT(0)
+/* INT2 pin output mode */
+#define S35390A_INT2_MODE_MASK 0x0E
#define S35390A_INT2_MODE_NOINTR 0x00
-#define S35390A_INT2_MODE_FREQ 0x10
-#define S35390A_INT2_MODE_ALARM 0x40
-#define S35390A_INT2_MODE_PMIN_EDG 0x20
+#define S35390A_INT2_MODE_ALARM BIT(1) /* INT2AE */
+#define S35390A_INT2_MODE_PMIN_EDG BIT(2) /* INT2ME */
+#define S35390A_INT2_MODE_FREQ BIT(3) /* INT2FE */
+#define S35390A_INT2_MODE_PMIN (BIT(3) | BIT(2)) /* INT2FE | INT2ME */
static const struct i2c_device_id s35390a_id[] = {
{ "s35390a", 0 },
@@ -284,6 +285,9 @@ static int s35390a_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
alm->time.tm_min, alm->time.tm_hour, alm->time.tm_mday,
alm->time.tm_mon, alm->time.tm_year, alm->time.tm_wday);
+ if (alm->time.tm_sec != 0)
+ dev_warn(&client->dev, "Alarms are only supported on a per minute basis!\n");
+
/* disable interrupt (which deasserts the irq line) */
err = s35390a_set_reg(s35390a, S35390A_CMD_STATUS2, &sts, sizeof(sts));
if (err < 0)
@@ -299,9 +303,6 @@ static int s35390a_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
else
sts = S35390A_INT2_MODE_NOINTR;
- /* This chip expects the bits of each byte to be in reverse order */
- sts = bitrev8(sts);
-
/* set interupt mode*/
err = s35390a_set_reg(s35390a, S35390A_CMD_STATUS2, &sts, sizeof(sts));
if (err < 0)
@@ -339,7 +340,7 @@ static int s35390a_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
if (err < 0)
return err;
- if ((bitrev8(sts) & S35390A_INT2_MODE_MASK) != S35390A_INT2_MODE_ALARM) {
+ if ((sts & S35390A_INT2_MODE_MASK) != S35390A_INT2_MODE_ALARM) {
/*
* When the alarm isn't enabled, the register to configure
* the alarm time isn't accessible.
@@ -431,14 +432,14 @@ static int s35390a_probe(struct i2c_client *client,
unsigned int i;
struct s35390a *s35390a;
char buf, status1;
+ struct device *dev = &client->dev;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
err = -ENODEV;
goto exit;
}
- s35390a = devm_kzalloc(&client->dev, sizeof(struct s35390a),
- GFP_KERNEL);
+ s35390a = devm_kzalloc(dev, sizeof(struct s35390a), GFP_KERNEL);
if (!s35390a) {
err = -ENOMEM;
goto exit;
@@ -452,8 +453,8 @@ static int s35390a_probe(struct i2c_client *client,
s35390a->client[i] = i2c_new_dummy(client->adapter,
client->addr + i);
if (!s35390a->client[i]) {
- dev_err(&client->dev, "Address %02x unavailable\n",
- client->addr + i);
+ dev_err(dev, "Address %02x unavailable\n",
+ client->addr + i);
err = -EBUSY;
goto exit_dummy;
}
@@ -462,7 +463,7 @@ static int s35390a_probe(struct i2c_client *client,
err_read = s35390a_read_status(s35390a, &status1);
if (err_read < 0) {
err = err_read;
- dev_err(&client->dev, "error resetting chip\n");
+ dev_err(dev, "error resetting chip\n");
goto exit_dummy;
}
@@ -476,28 +477,30 @@ static int s35390a_probe(struct i2c_client *client,
buf = 0;
err = s35390a_set_reg(s35390a, S35390A_CMD_STATUS2, &buf, 1);
if (err < 0) {
- dev_err(&client->dev, "error disabling alarm");
+ dev_err(dev, "error disabling alarm");
goto exit_dummy;
}
} else {
err = s35390a_disable_test_mode(s35390a);
if (err < 0) {
- dev_err(&client->dev, "error disabling test mode\n");
+ dev_err(dev, "error disabling test mode\n");
goto exit_dummy;
}
}
- device_set_wakeup_capable(&client->dev, 1);
+ device_set_wakeup_capable(dev, 1);
- s35390a->rtc = devm_rtc_device_register(&client->dev,
- s35390a_driver.driver.name,
- &s35390a_rtc_ops, THIS_MODULE);
+ s35390a->rtc = devm_rtc_device_register(dev, s35390a_driver.driver.name,
+ &s35390a_rtc_ops, THIS_MODULE);
if (IS_ERR(s35390a->rtc)) {
err = PTR_ERR(s35390a->rtc);
goto exit_dummy;
}
+ /* supports per-minute alarms only, therefore set uie_unsupported */
+ s35390a->rtc->uie_unsupported = 1;
+
if (status1 & S35390A_FLAG_INT2)
rtc_update_irq(s35390a->rtc, 1, RTC_AF);
diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c
index 5fe021821831..49474a31c66d 100644
--- a/drivers/rtc/rtc-st-lpc.c
+++ b/drivers/rtc/rtc-st-lpc.c
@@ -162,10 +162,6 @@ static int st_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *t)
now_secs = rtc_tm_to_time64(&now);
alarm_secs = rtc_tm_to_time64(&t->time);
- /* Invalid alarm time */
- if (now_secs > alarm_secs)
- return -EINVAL;
-
memcpy(&rtc->alarm, t, sizeof(struct rtc_wkalrm));
/* Now many secs to fire */
diff --git a/drivers/rtc/rtc-stm32.c b/drivers/rtc/rtc-stm32.c
index 8e6c9b3bcc29..773a1990b93f 100644
--- a/drivers/rtc/rtc-stm32.c
+++ b/drivers/rtc/rtc-stm32.c
@@ -519,11 +519,7 @@ static int stm32_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
/* Write to Alarm register */
writel_relaxed(alrmar, rtc->base + regs->alrmar);
- if (alrm->enabled)
- stm32_rtc_alarm_irq_enable(dev, 1);
- else
- stm32_rtc_alarm_irq_enable(dev, 0);
-
+ stm32_rtc_alarm_irq_enable(dev, alrm->enabled);
end:
stm32_rtc_wpr_lock(rtc);
diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c
index 8128ec200ba2..c0e75c373605 100644
--- a/drivers/rtc/rtc-sun6i.c
+++ b/drivers/rtc/rtc-sun6i.c
@@ -672,6 +672,7 @@ static const struct of_device_id sun6i_rtc_dt_ids[] = {
{ .compatible = "allwinner,sun6i-a31-rtc" },
{ .compatible = "allwinner,sun8i-a23-rtc" },
{ .compatible = "allwinner,sun8i-h3-rtc" },
+ { .compatible = "allwinner,sun8i-r40-rtc" },
{ .compatible = "allwinner,sun8i-v3-rtc" },
{ .compatible = "allwinner,sun50i-h5-rtc" },
{ /* sentinel */ },
diff --git a/drivers/rtc/rtc-tegra.c b/drivers/rtc/rtc-tegra.c
index f0ce76865434..8fa1b3febf69 100644
--- a/drivers/rtc/rtc-tegra.c
+++ b/drivers/rtc/rtc-tegra.c
@@ -2,7 +2,7 @@
/*
* An RTC driver for the NVIDIA Tegra 200 series internal RTC.
*
- * Copyright (c) 2010, NVIDIA Corporation.
+ * Copyright (c) 2010-2019, NVIDIA Corporation.
*/
#include <linux/clk.h>
@@ -18,10 +18,10 @@
#include <linux/rtc.h>
#include <linux/slab.h>
-/* set to 1 = busy every eight 32kHz clocks during copy of sec+msec to AHB */
+/* Set to 1 = busy every eight 32 kHz clocks during copy of sec+msec to AHB. */
#define TEGRA_RTC_REG_BUSY 0x004
#define TEGRA_RTC_REG_SECONDS 0x008
-/* when msec is read, the seconds are buffered into shadow seconds. */
+/* When msec is read, the seconds are buffered into shadow seconds. */
#define TEGRA_RTC_REG_SHADOW_SECONDS 0x00c
#define TEGRA_RTC_REG_MILLI_SECONDS 0x010
#define TEGRA_RTC_REG_SECONDS_ALARM0 0x014
@@ -46,44 +46,48 @@
#define TEGRA_RTC_INTR_STATUS_SEC_ALARM0 (1<<0)
struct tegra_rtc_info {
- struct platform_device *pdev;
- struct rtc_device *rtc_dev;
- void __iomem *rtc_base; /* NULL if not initialized. */
- struct clk *clk;
- int tegra_rtc_irq; /* alarm and periodic irq */
- spinlock_t tegra_rtc_lock;
+ struct platform_device *pdev;
+ struct rtc_device *rtc;
+ void __iomem *base; /* NULL if not initialized */
+ struct clk *clk;
+ int irq; /* alarm and periodic IRQ */
+ spinlock_t lock;
};
-/* RTC hardware is busy when it is updating its values over AHB once
- * every eight 32kHz clocks (~250uS).
- * outside of these updates the CPU is free to write.
- * CPU is always free to read.
+/*
+ * RTC hardware is busy when it is updating its values over AHB once every
+ * eight 32 kHz clocks (~250 us). Outside of these updates the CPU is free to
+ * write. CPU is always free to read.
*/
static inline u32 tegra_rtc_check_busy(struct tegra_rtc_info *info)
{
- return readl(info->rtc_base + TEGRA_RTC_REG_BUSY) & 1;
+ return readl(info->base + TEGRA_RTC_REG_BUSY) & 1;
}
-/* Wait for hardware to be ready for writing.
- * This function tries to maximize the amount of time before the next update.
- * It does this by waiting for the RTC to become busy with its periodic update,
- * then returning once the RTC first becomes not busy.
+/*
+ * Wait for hardware to be ready for writing. This function tries to maximize
+ * the amount of time before the next update. It does this by waiting for the
+ * RTC to become busy with its periodic update, then returning once the RTC
+ * first becomes not busy.
+ *
* This periodic update (where the seconds and milliseconds are copied to the
- * AHB side) occurs every eight 32kHz clocks (~250uS).
- * The behavior of this function allows us to make some assumptions without
- * introducing a race, because 250uS is plenty of time to read/write a value.
+ * AHB side) occurs every eight 32 kHz clocks (~250 us). The behavior of this
+ * function allows us to make some assumptions without introducing a race,
+ * because 250 us is plenty of time to read/write a value.
*/
static int tegra_rtc_wait_while_busy(struct device *dev)
{
struct tegra_rtc_info *info = dev_get_drvdata(dev);
+ int retries = 500; /* ~490 us is the worst case, ~250 us is best */
- int retries = 500; /* ~490 us is the worst case, ~250 us is best. */
-
- /* first wait for the RTC to become busy. this is when it
- * posts its updated seconds+msec registers to AHB side. */
+ /*
+ * First wait for the RTC to become busy. This is when it posts its
+ * updated seconds+msec registers to AHB side.
+ */
while (tegra_rtc_check_busy(info)) {
if (!retries--)
goto retry_failed;
+
udelay(1);
}
@@ -91,28 +95,30 @@ static int tegra_rtc_wait_while_busy(struct device *dev)
return 0;
retry_failed:
- dev_err(dev, "write failed:retry count exceeded.\n");
+ dev_err(dev, "write failed: retry count exceeded\n");
return -ETIMEDOUT;
}
static int tegra_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
struct tegra_rtc_info *info = dev_get_drvdata(dev);
- unsigned long sec, msec;
- unsigned long sl_irq_flags;
+ unsigned long flags;
+ u32 sec, msec;
- /* RTC hardware copies seconds to shadow seconds when a read
- * of milliseconds occurs. use a lock to keep other threads out. */
- spin_lock_irqsave(&info->tegra_rtc_lock, sl_irq_flags);
+ /*
+ * RTC hardware copies seconds to shadow seconds when a read of
+ * milliseconds occurs. use a lock to keep other threads out.
+ */
+ spin_lock_irqsave(&info->lock, flags);
- msec = readl(info->rtc_base + TEGRA_RTC_REG_MILLI_SECONDS);
- sec = readl(info->rtc_base + TEGRA_RTC_REG_SHADOW_SECONDS);
+ msec = readl(info->base + TEGRA_RTC_REG_MILLI_SECONDS);
+ sec = readl(info->base + TEGRA_RTC_REG_SHADOW_SECONDS);
- spin_unlock_irqrestore(&info->tegra_rtc_lock, sl_irq_flags);
+ spin_unlock_irqrestore(&info->lock, flags);
rtc_time64_to_tm(sec, tm);
- dev_vdbg(dev, "time read as %lu. %ptR\n", sec, tm);
+ dev_vdbg(dev, "time read as %u, %ptR\n", sec, tm);
return 0;
}
@@ -120,21 +126,21 @@ static int tegra_rtc_read_time(struct device *dev, struct rtc_time *tm)
static int tegra_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
struct tegra_rtc_info *info = dev_get_drvdata(dev);
- unsigned long sec;
+ u32 sec;
int ret;
- /* convert tm to seconds. */
+ /* convert tm to seconds */
sec = rtc_tm_to_time64(tm);
- dev_vdbg(dev, "time set to %lu. %ptR\n", sec, tm);
+ dev_vdbg(dev, "time set to %u, %ptR\n", sec, tm);
- /* seconds only written if wait succeeded. */
+ /* seconds only written if wait succeeded */
ret = tegra_rtc_wait_while_busy(dev);
if (!ret)
- writel(sec, info->rtc_base + TEGRA_RTC_REG_SECONDS);
+ writel(sec, info->base + TEGRA_RTC_REG_SECONDS);
dev_vdbg(dev, "time read back as %d\n",
- readl(info->rtc_base + TEGRA_RTC_REG_SECONDS));
+ readl(info->base + TEGRA_RTC_REG_SECONDS));
return ret;
}
@@ -142,22 +148,21 @@ static int tegra_rtc_set_time(struct device *dev, struct rtc_time *tm)
static int tegra_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
{
struct tegra_rtc_info *info = dev_get_drvdata(dev);
- unsigned long sec;
- unsigned tmp;
+ u32 sec, value;
- sec = readl(info->rtc_base + TEGRA_RTC_REG_SECONDS_ALARM0);
+ sec = readl(info->base + TEGRA_RTC_REG_SECONDS_ALARM0);
if (sec == 0) {
- /* alarm is disabled. */
+ /* alarm is disabled */
alarm->enabled = 0;
} else {
- /* alarm is enabled. */
+ /* alarm is enabled */
alarm->enabled = 1;
rtc_time64_to_tm(sec, &alarm->time);
}
- tmp = readl(info->rtc_base + TEGRA_RTC_REG_INTR_STATUS);
- alarm->pending = (tmp & TEGRA_RTC_INTR_STATUS_SEC_ALARM0) != 0;
+ value = readl(info->base + TEGRA_RTC_REG_INTR_STATUS);
+ alarm->pending = (value & TEGRA_RTC_INTR_STATUS_SEC_ALARM0) != 0;
return 0;
}
@@ -165,22 +170,22 @@ static int tegra_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
static int tegra_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
struct tegra_rtc_info *info = dev_get_drvdata(dev);
- unsigned status;
- unsigned long sl_irq_flags;
+ unsigned long flags;
+ u32 status;
tegra_rtc_wait_while_busy(dev);
- spin_lock_irqsave(&info->tegra_rtc_lock, sl_irq_flags);
+ spin_lock_irqsave(&info->lock, flags);
- /* read the original value, and OR in the flag. */
- status = readl(info->rtc_base + TEGRA_RTC_REG_INTR_MASK);
+ /* read the original value, and OR in the flag */
+ status = readl(info->base + TEGRA_RTC_REG_INTR_MASK);
if (enabled)
status |= TEGRA_RTC_INTR_MASK_SEC_ALARM0; /* set it */
else
status &= ~TEGRA_RTC_INTR_MASK_SEC_ALARM0; /* clear it */
- writel(status, info->rtc_base + TEGRA_RTC_REG_INTR_MASK);
+ writel(status, info->base + TEGRA_RTC_REG_INTR_MASK);
- spin_unlock_irqrestore(&info->tegra_rtc_lock, sl_irq_flags);
+ spin_unlock_irqrestore(&info->lock, flags);
return 0;
}
@@ -188,7 +193,7 @@ static int tegra_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
static int tegra_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
{
struct tegra_rtc_info *info = dev_get_drvdata(dev);
- unsigned long sec;
+ u32 sec;
if (alarm->enabled)
sec = rtc_tm_to_time64(&alarm->time);
@@ -196,16 +201,16 @@ static int tegra_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
sec = 0;
tegra_rtc_wait_while_busy(dev);
- writel(sec, info->rtc_base + TEGRA_RTC_REG_SECONDS_ALARM0);
+ writel(sec, info->base + TEGRA_RTC_REG_SECONDS_ALARM0);
dev_vdbg(dev, "alarm read back as %d\n",
- readl(info->rtc_base + TEGRA_RTC_REG_SECONDS_ALARM0));
+ readl(info->base + TEGRA_RTC_REG_SECONDS_ALARM0));
/* if successfully written and alarm is enabled ... */
if (sec) {
tegra_rtc_alarm_irq_enable(dev, 1);
- dev_vdbg(dev, "alarm set as %lu. %ptR\n", sec, &alarm->time);
+ dev_vdbg(dev, "alarm set as %u, %ptR\n", sec, &alarm->time);
} else {
- /* disable alarm if 0 or write error. */
+ /* disable alarm if 0 or write error */
dev_vdbg(dev, "alarm disabled\n");
tegra_rtc_alarm_irq_enable(dev, 0);
}
@@ -227,39 +232,39 @@ static irqreturn_t tegra_rtc_irq_handler(int irq, void *data)
{
struct device *dev = data;
struct tegra_rtc_info *info = dev_get_drvdata(dev);
- unsigned long events = 0;
- unsigned status;
- unsigned long sl_irq_flags;
+ unsigned long events = 0, flags;
+ u32 status;
- status = readl(info->rtc_base + TEGRA_RTC_REG_INTR_STATUS);
+ status = readl(info->base + TEGRA_RTC_REG_INTR_STATUS);
if (status) {
- /* clear the interrupt masks and status on any irq. */
+ /* clear the interrupt masks and status on any IRQ */
tegra_rtc_wait_while_busy(dev);
- spin_lock_irqsave(&info->tegra_rtc_lock, sl_irq_flags);
- writel(0, info->rtc_base + TEGRA_RTC_REG_INTR_MASK);
- writel(status, info->rtc_base + TEGRA_RTC_REG_INTR_STATUS);
- spin_unlock_irqrestore(&info->tegra_rtc_lock, sl_irq_flags);
+
+ spin_lock_irqsave(&info->lock, flags);
+ writel(0, info->base + TEGRA_RTC_REG_INTR_MASK);
+ writel(status, info->base + TEGRA_RTC_REG_INTR_STATUS);
+ spin_unlock_irqrestore(&info->lock, flags);
}
- /* check if Alarm */
- if ((status & TEGRA_RTC_INTR_STATUS_SEC_ALARM0))
+ /* check if alarm */
+ if (status & TEGRA_RTC_INTR_STATUS_SEC_ALARM0)
events |= RTC_IRQF | RTC_AF;
- /* check if Periodic */
- if ((status & TEGRA_RTC_INTR_STATUS_SEC_CDN_ALARM))
+ /* check if periodic */
+ if (status & TEGRA_RTC_INTR_STATUS_SEC_CDN_ALARM)
events |= RTC_IRQF | RTC_PF;
- rtc_update_irq(info->rtc_dev, 1, events);
+ rtc_update_irq(info->rtc, 1, events);
return IRQ_HANDLED;
}
static const struct rtc_class_ops tegra_rtc_ops = {
- .read_time = tegra_rtc_read_time,
- .set_time = tegra_rtc_set_time,
- .read_alarm = tegra_rtc_read_alarm,
- .set_alarm = tegra_rtc_set_alarm,
- .proc = tegra_rtc_proc,
+ .read_time = tegra_rtc_read_time,
+ .set_time = tegra_rtc_set_time,
+ .read_alarm = tegra_rtc_read_alarm,
+ .set_alarm = tegra_rtc_set_alarm,
+ .proc = tegra_rtc_proc,
.alarm_irq_enable = tegra_rtc_alarm_irq_enable,
};
@@ -269,21 +274,20 @@ static const struct of_device_id tegra_rtc_dt_match[] = {
};
MODULE_DEVICE_TABLE(of, tegra_rtc_dt_match);
-static int __init tegra_rtc_probe(struct platform_device *pdev)
+static int tegra_rtc_probe(struct platform_device *pdev)
{
struct tegra_rtc_info *info;
struct resource *res;
int ret;
- info = devm_kzalloc(&pdev->dev, sizeof(struct tegra_rtc_info),
- GFP_KERNEL);
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- info->rtc_base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(info->rtc_base))
- return PTR_ERR(info->rtc_base);
+ info->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(info->base))
+ return PTR_ERR(info->base);
ret = platform_get_irq(pdev, 0);
if (ret <= 0) {
@@ -291,14 +295,14 @@ static int __init tegra_rtc_probe(struct platform_device *pdev)
return ret;
}
- info->tegra_rtc_irq = ret;
+ info->irq = ret;
- info->rtc_dev = devm_rtc_allocate_device(&pdev->dev);
- if (IS_ERR(info->rtc_dev))
- return PTR_ERR(info->rtc_dev);
+ info->rtc = devm_rtc_allocate_device(&pdev->dev);
+ if (IS_ERR(info->rtc))
+ return PTR_ERR(info->rtc);
- info->rtc_dev->ops = &tegra_rtc_ops;
- info->rtc_dev->range_max = U32_MAX;
+ info->rtc->ops = &tegra_rtc_ops;
+ info->rtc->range_max = U32_MAX;
info->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(info->clk))
@@ -308,33 +312,30 @@ static int __init tegra_rtc_probe(struct platform_device *pdev)
if (ret < 0)
return ret;
- /* set context info. */
+ /* set context info */
info->pdev = pdev;
- spin_lock_init(&info->tegra_rtc_lock);
+ spin_lock_init(&info->lock);
platform_set_drvdata(pdev, info);
- /* clear out the hardware. */
- writel(0, info->rtc_base + TEGRA_RTC_REG_SECONDS_ALARM0);
- writel(0xffffffff, info->rtc_base + TEGRA_RTC_REG_INTR_STATUS);
- writel(0, info->rtc_base + TEGRA_RTC_REG_INTR_MASK);
+ /* clear out the hardware */
+ writel(0, info->base + TEGRA_RTC_REG_SECONDS_ALARM0);
+ writel(0xffffffff, info->base + TEGRA_RTC_REG_INTR_STATUS);
+ writel(0, info->base + TEGRA_RTC_REG_INTR_MASK);
device_init_wakeup(&pdev->dev, 1);
- ret = devm_request_irq(&pdev->dev, info->tegra_rtc_irq,
- tegra_rtc_irq_handler, IRQF_TRIGGER_HIGH,
- dev_name(&pdev->dev), &pdev->dev);
+ ret = devm_request_irq(&pdev->dev, info->irq, tegra_rtc_irq_handler,
+ IRQF_TRIGGER_HIGH, dev_name(&pdev->dev),
+ &pdev->dev);
if (ret) {
- dev_err(&pdev->dev,
- "Unable to request interrupt for device (err=%d).\n",
- ret);
+ dev_err(&pdev->dev, "failed to request interrupt: %d\n", ret);
goto disable_clk;
}
- ret = rtc_register_device(info->rtc_dev);
+ ret = rtc_register_device(info->rtc);
if (ret) {
- dev_err(&pdev->dev, "Unable to register device (err=%d).\n",
- ret);
+ dev_err(&pdev->dev, "failed to register device: %d\n", ret);
goto disable_clk;
}
@@ -363,20 +364,20 @@ static int tegra_rtc_suspend(struct device *dev)
tegra_rtc_wait_while_busy(dev);
- /* only use ALARM0 as a wake source. */
- writel(0xffffffff, info->rtc_base + TEGRA_RTC_REG_INTR_STATUS);
+ /* only use ALARM0 as a wake source */
+ writel(0xffffffff, info->base + TEGRA_RTC_REG_INTR_STATUS);
writel(TEGRA_RTC_INTR_STATUS_SEC_ALARM0,
- info->rtc_base + TEGRA_RTC_REG_INTR_MASK);
+ info->base + TEGRA_RTC_REG_INTR_MASK);
dev_vdbg(dev, "alarm sec = %d\n",
- readl(info->rtc_base + TEGRA_RTC_REG_SECONDS_ALARM0));
+ readl(info->base + TEGRA_RTC_REG_SECONDS_ALARM0));
- dev_vdbg(dev, "Suspend (device_may_wakeup=%d) irq:%d\n",
- device_may_wakeup(dev), info->tegra_rtc_irq);
+ dev_vdbg(dev, "Suspend (device_may_wakeup=%d) IRQ:%d\n",
+ device_may_wakeup(dev), info->irq);
- /* leave the alarms on as a wake source. */
+ /* leave the alarms on as a wake source */
if (device_may_wakeup(dev))
- enable_irq_wake(info->tegra_rtc_irq);
+ enable_irq_wake(info->irq);
return 0;
}
@@ -386,10 +387,11 @@ static int tegra_rtc_resume(struct device *dev)
struct tegra_rtc_info *info = dev_get_drvdata(dev);
dev_vdbg(dev, "Resume (device_may_wakeup=%d)\n",
- device_may_wakeup(dev));
- /* alarms were left on as a wake source, turn them off. */
+ device_may_wakeup(dev));
+
+ /* alarms were left on as a wake source, turn them off */
if (device_may_wakeup(dev))
- disable_irq_wake(info->tegra_rtc_irq);
+ disable_irq_wake(info->irq);
return 0;
}
@@ -399,22 +401,21 @@ static SIMPLE_DEV_PM_OPS(tegra_rtc_pm_ops, tegra_rtc_suspend, tegra_rtc_resume);
static void tegra_rtc_shutdown(struct platform_device *pdev)
{
- dev_vdbg(&pdev->dev, "disabling interrupts.\n");
+ dev_vdbg(&pdev->dev, "disabling interrupts\n");
tegra_rtc_alarm_irq_enable(&pdev->dev, 0);
}
-MODULE_ALIAS("platform:tegra_rtc");
static struct platform_driver tegra_rtc_driver = {
- .remove = tegra_rtc_remove,
- .shutdown = tegra_rtc_shutdown,
- .driver = {
- .name = "tegra_rtc",
+ .probe = tegra_rtc_probe,
+ .remove = tegra_rtc_remove,
+ .shutdown = tegra_rtc_shutdown,
+ .driver = {
+ .name = "tegra_rtc",
.of_match_table = tegra_rtc_dt_match,
- .pm = &tegra_rtc_pm_ops,
+ .pm = &tegra_rtc_pm_ops,
},
};
-
-module_platform_driver_probe(tegra_rtc_driver, tegra_rtc_probe);
+module_platform_driver(tegra_rtc_driver);
MODULE_AUTHOR("Jon Mayo <jmayo@nvidia.com>");
MODULE_DESCRIPTION("driver for Tegra internal RTC");
diff --git a/drivers/rtc/rtc-test.c b/drivers/rtc/rtc-test.c
index b298e9902f45..74b3a0603b73 100644
--- a/drivers/rtc/rtc-test.c
+++ b/drivers/rtc/rtc-test.c
@@ -133,6 +133,7 @@ static int test_probe(struct platform_device *plat_dev)
break;
default:
rtd->rtc->ops = &test_rtc_ops;
+ device_init_wakeup(&plat_dev->dev, 1);
}
timer_setup(&rtd->alarm, test_rtc_alarm_handler, 0);
diff --git a/drivers/rtc/rtc-tps65910.c b/drivers/rtc/rtc-tps65910.c
index 8556d925e52a..7078f6da1cbc 100644
--- a/drivers/rtc/rtc-tps65910.c
+++ b/drivers/rtc/rtc-tps65910.c
@@ -143,7 +143,7 @@ static int tps65910_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
struct tps65910 *tps = dev_get_drvdata(dev->parent);
int ret;
- ret = regmap_bulk_read(tps->regmap, TPS65910_SECONDS, alarm_data,
+ ret = regmap_bulk_read(tps->regmap, TPS65910_ALARM_SECONDS, alarm_data,
NUM_TIME_REGS);
if (ret < 0) {
dev_err(dev, "rtc_read_alarm error %d\n", ret);
diff --git a/drivers/rtc/rtc-wm831x.c b/drivers/rtc/rtc-wm831x.c
index d2e8b21c90c4..ccef887d2690 100644
--- a/drivers/rtc/rtc-wm831x.c
+++ b/drivers/rtc/rtc-wm831x.c
@@ -435,7 +435,8 @@ static int wm831x_rtc_probe(struct platform_device *pdev)
ret = devm_request_threaded_irq(&pdev->dev, alm_irq, NULL,
wm831x_alm_irq,
- IRQF_TRIGGER_RISING, "RTC alarm",
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ "RTC alarm",
wm831x_rtc);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to request alarm IRQ %d: %d\n",
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-13 20:20:51 +0000