summaryrefslogtreecommitdiff
path: root/drivers/rtc/rtc-rk808.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/rtc/rtc-rk808.c')
-rw-r--r--drivers/rtc/rtc-rk808.c156
1 files changed, 78 insertions, 78 deletions
diff --git a/drivers/rtc/rtc-rk808.c b/drivers/rtc/rtc-rk808.c
index 35c9aada07c8..59b8e9a30fe6 100644
--- a/drivers/rtc/rtc-rk808.c
+++ b/drivers/rtc/rtc-rk808.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* RTC driver for Rockchip RK808
*
@@ -5,15 +6,6 @@
*
* Author: Chris Zhong <zyw@rock-chips.com>
* Author: Zhang Qing <zhangqing@rock-chips.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
*/
#include <linux/module.h>
@@ -22,7 +14,6 @@
#include <linux/bcd.h>
#include <linux/mfd/rk808.h>
#include <linux/platform_device.h>
-#include <linux/i2c.h>
/* RTC_CTRL_REG bitfields */
#define BIT_RTC_CTRL_REG_STOP_RTC_M BIT(0)
@@ -50,9 +41,18 @@
#define NUM_TIME_REGS (RK808_WEEKS_REG - RK808_SECONDS_REG + 1)
#define NUM_ALARM_REGS (RK808_ALARM_YEARS_REG - RK808_ALARM_SECONDS_REG + 1)
+struct rk_rtc_compat_reg {
+ unsigned int ctrl_reg;
+ unsigned int status_reg;
+ unsigned int alarm_seconds_reg;
+ unsigned int int_reg;
+ unsigned int seconds_reg;
+};
+
struct rk808_rtc {
- struct rk808 *rk808;
+ struct regmap *regmap;
struct rtc_device *rtc;
+ struct rk_rtc_compat_reg *creg;
int irq;
};
@@ -96,12 +96,11 @@ static void gregorian_to_rockchip(struct rtc_time *tm)
static int rk808_rtc_readtime(struct device *dev, struct rtc_time *tm)
{
struct rk808_rtc *rk808_rtc = dev_get_drvdata(dev);
- struct rk808 *rk808 = rk808_rtc->rk808;
u8 rtc_data[NUM_TIME_REGS];
int ret;
/* Force an update of the shadowed registers right now */
- ret = regmap_update_bits(rk808->regmap, RK808_RTC_CTRL_REG,
+ ret = regmap_update_bits(rk808_rtc->regmap, rk808_rtc->creg->ctrl_reg,
BIT_RTC_CTRL_REG_RTC_GET_TIME,
BIT_RTC_CTRL_REG_RTC_GET_TIME);
if (ret) {
@@ -115,7 +114,7 @@ static int rk808_rtc_readtime(struct device *dev, struct rtc_time *tm)
* 32khz. If we clear the GET_TIME bit here, the time of i2c transfer
* certainly more than 31.25us: 16 * 2.5us at 400kHz bus frequency.
*/
- ret = regmap_update_bits(rk808->regmap, RK808_RTC_CTRL_REG,
+ ret = regmap_update_bits(rk808_rtc->regmap, rk808_rtc->creg->ctrl_reg,
BIT_RTC_CTRL_REG_RTC_GET_TIME,
0);
if (ret) {
@@ -123,7 +122,7 @@ static int rk808_rtc_readtime(struct device *dev, struct rtc_time *tm)
return ret;
}
- ret = regmap_bulk_read(rk808->regmap, RK808_SECONDS_REG,
+ ret = regmap_bulk_read(rk808_rtc->regmap, rk808_rtc->creg->seconds_reg,
rtc_data, NUM_TIME_REGS);
if (ret) {
dev_err(dev, "Failed to bulk read rtc_data: %d\n", ret);
@@ -138,9 +137,7 @@ static int rk808_rtc_readtime(struct device *dev, struct rtc_time *tm)
tm->tm_year = (bcd2bin(rtc_data[5] & YEARS_REG_MSK)) + 100;
tm->tm_wday = bcd2bin(rtc_data[6] & WEEKS_REG_MSK);
rockchip_to_gregorian(tm);
- dev_dbg(dev, "RTC date/time %4d-%02d-%02d(%d) %02d:%02d:%02d\n",
- 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday,
- tm->tm_wday, tm->tm_hour, tm->tm_min, tm->tm_sec);
+ dev_dbg(dev, "RTC date/time %ptRd(%d) %ptRt\n", tm, tm->tm_wday, tm);
return ret;
}
@@ -149,13 +146,10 @@ static int rk808_rtc_readtime(struct device *dev, struct rtc_time *tm)
static int rk808_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
struct rk808_rtc *rk808_rtc = dev_get_drvdata(dev);
- struct rk808 *rk808 = rk808_rtc->rk808;
u8 rtc_data[NUM_TIME_REGS];
int ret;
- dev_dbg(dev, "set RTC date/time %4d-%02d-%02d(%d) %02d:%02d:%02d\n",
- 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday,
- tm->tm_wday, tm->tm_hour, tm->tm_min, tm->tm_sec);
+ dev_dbg(dev, "set RTC date/time %ptRd(%d) %ptRt\n", tm, tm->tm_wday, tm);
gregorian_to_rockchip(tm);
rtc_data[0] = bin2bcd(tm->tm_sec);
rtc_data[1] = bin2bcd(tm->tm_min);
@@ -166,7 +160,7 @@ static int rk808_rtc_set_time(struct device *dev, struct rtc_time *tm)
rtc_data[6] = bin2bcd(tm->tm_wday);
/* Stop RTC while updating the RTC registers */
- ret = regmap_update_bits(rk808->regmap, RK808_RTC_CTRL_REG,
+ ret = regmap_update_bits(rk808_rtc->regmap, rk808_rtc->creg->ctrl_reg,
BIT_RTC_CTRL_REG_STOP_RTC_M,
BIT_RTC_CTRL_REG_STOP_RTC_M);
if (ret) {
@@ -174,14 +168,14 @@ static int rk808_rtc_set_time(struct device *dev, struct rtc_time *tm)
return ret;
}
- ret = regmap_bulk_write(rk808->regmap, RK808_SECONDS_REG,
+ ret = regmap_bulk_write(rk808_rtc->regmap, rk808_rtc->creg->seconds_reg,
rtc_data, NUM_TIME_REGS);
if (ret) {
dev_err(dev, "Failed to bull write rtc_data: %d\n", ret);
return ret;
}
/* Start RTC again */
- ret = regmap_update_bits(rk808->regmap, RK808_RTC_CTRL_REG,
+ ret = regmap_update_bits(rk808_rtc->regmap, rk808_rtc->creg->ctrl_reg,
BIT_RTC_CTRL_REG_STOP_RTC_M, 0);
if (ret) {
dev_err(dev, "Failed to update RTC control: %d\n", ret);
@@ -194,13 +188,17 @@ static int rk808_rtc_set_time(struct device *dev, struct rtc_time *tm)
static int rk808_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct rk808_rtc *rk808_rtc = dev_get_drvdata(dev);
- struct rk808 *rk808 = rk808_rtc->rk808;
u8 alrm_data[NUM_ALARM_REGS];
uint32_t int_reg;
int ret;
- ret = regmap_bulk_read(rk808->regmap, RK808_ALARM_SECONDS_REG,
+ ret = regmap_bulk_read(rk808_rtc->regmap,
+ rk808_rtc->creg->alarm_seconds_reg,
alrm_data, NUM_ALARM_REGS);
+ if (ret) {
+ dev_err(dev, "Failed to read RTC alarm date REG: %d\n", ret);
+ return ret;
+ }
alrm->time.tm_sec = bcd2bin(alrm_data[0] & SECONDS_REG_MSK);
alrm->time.tm_min = bcd2bin(alrm_data[1] & MINUTES_REG_MAK);
@@ -210,16 +208,14 @@ static int rk808_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
alrm->time.tm_year = (bcd2bin(alrm_data[5] & YEARS_REG_MSK)) + 100;
rockchip_to_gregorian(&alrm->time);
- ret = regmap_read(rk808->regmap, RK808_RTC_INT_REG, &int_reg);
+ ret = regmap_read(rk808_rtc->regmap, rk808_rtc->creg->int_reg, &int_reg);
if (ret) {
dev_err(dev, "Failed to read RTC INT REG: %d\n", ret);
return ret;
}
- dev_dbg(dev, "alrm read RTC date/time %4d-%02d-%02d(%d) %02d:%02d:%02d\n",
- 1900 + alrm->time.tm_year, alrm->time.tm_mon + 1,
- alrm->time.tm_mday, alrm->time.tm_wday, alrm->time.tm_hour,
- alrm->time.tm_min, alrm->time.tm_sec);
+ dev_dbg(dev, "alrm read RTC date/time %ptRd(%d) %ptRt\n",
+ &alrm->time, alrm->time.tm_wday, &alrm->time);
alrm->enabled = (int_reg & BIT_RTC_INTERRUPTS_REG_IT_ALARM_M) ? 1 : 0;
@@ -228,10 +224,9 @@ static int rk808_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
static int rk808_rtc_stop_alarm(struct rk808_rtc *rk808_rtc)
{
- struct rk808 *rk808 = rk808_rtc->rk808;
int ret;
- ret = regmap_update_bits(rk808->regmap, RK808_RTC_INT_REG,
+ ret = regmap_update_bits(rk808_rtc->regmap, rk808_rtc->creg->int_reg,
BIT_RTC_INTERRUPTS_REG_IT_ALARM_M, 0);
return ret;
@@ -239,10 +234,9 @@ static int rk808_rtc_stop_alarm(struct rk808_rtc *rk808_rtc)
static int rk808_rtc_start_alarm(struct rk808_rtc *rk808_rtc)
{
- struct rk808 *rk808 = rk808_rtc->rk808;
int ret;
- ret = regmap_update_bits(rk808->regmap, RK808_RTC_INT_REG,
+ ret = regmap_update_bits(rk808_rtc->regmap, rk808_rtc->creg->int_reg,
BIT_RTC_INTERRUPTS_REG_IT_ALARM_M,
BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
@@ -252,7 +246,6 @@ static int rk808_rtc_start_alarm(struct rk808_rtc *rk808_rtc)
static int rk808_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct rk808_rtc *rk808_rtc = dev_get_drvdata(dev);
- struct rk808 *rk808 = rk808_rtc->rk808;
u8 alrm_data[NUM_ALARM_REGS];
int ret;
@@ -261,10 +254,8 @@ static int rk808_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
dev_err(dev, "Failed to stop alarm: %d\n", ret);
return ret;
}
- dev_dbg(dev, "alrm set RTC date/time %4d-%02d-%02d(%d) %02d:%02d:%02d\n",
- 1900 + alrm->time.tm_year, alrm->time.tm_mon + 1,
- alrm->time.tm_mday, alrm->time.tm_wday, alrm->time.tm_hour,
- alrm->time.tm_min, alrm->time.tm_sec);
+ dev_dbg(dev, "alrm set RTC date/time %ptRd(%d) %ptRt\n",
+ &alrm->time, alrm->time.tm_wday, &alrm->time);
gregorian_to_rockchip(&alrm->time);
alrm_data[0] = bin2bcd(alrm->time.tm_sec);
@@ -274,7 +265,8 @@ static int rk808_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
alrm_data[4] = bin2bcd(alrm->time.tm_mon + 1);
alrm_data[5] = bin2bcd(alrm->time.tm_year - 100);
- ret = regmap_bulk_write(rk808->regmap, RK808_ALARM_SECONDS_REG,
+ ret = regmap_bulk_write(rk808_rtc->regmap,
+ rk808_rtc->creg->alarm_seconds_reg,
alrm_data, NUM_ALARM_REGS);
if (ret) {
dev_err(dev, "Failed to bulk write: %d\n", ret);
@@ -314,20 +306,18 @@ static int rk808_rtc_alarm_irq_enable(struct device *dev,
static irqreturn_t rk808_alarm_irq(int irq, void *data)
{
struct rk808_rtc *rk808_rtc = data;
- struct rk808 *rk808 = rk808_rtc->rk808;
- struct i2c_client *client = rk808->i2c;
int ret;
- ret = regmap_write(rk808->regmap, RK808_RTC_STATUS_REG,
+ ret = regmap_write(rk808_rtc->regmap, rk808_rtc->creg->status_reg,
RTC_STATUS_MASK);
if (ret) {
- dev_err(&client->dev,
+ dev_err(&rk808_rtc->rtc->dev,
"%s:Failed to update RTC status: %d\n", __func__, ret);
return ret;
}
rtc_update_irq(rk808_rtc->rtc, 1, RTC_IRQF | RTC_AF);
- dev_dbg(&client->dev,
+ dev_dbg(&rk808_rtc->rtc->dev,
"%s:irq=%d\n", __func__, irq);
return IRQ_HANDLED;
}
@@ -344,8 +334,7 @@ static const struct rtc_class_ops rk808_rtc_ops = {
/* Turn off the alarm if it should not be a wake source. */
static int rk808_rtc_suspend(struct device *dev)
{
- struct platform_device *pdev = to_platform_device(dev);
- struct rk808_rtc *rk808_rtc = dev_get_drvdata(&pdev->dev);
+ struct rk808_rtc *rk808_rtc = dev_get_drvdata(dev);
if (device_may_wakeup(dev))
enable_irq_wake(rk808_rtc->irq);
@@ -358,8 +347,7 @@ static int rk808_rtc_suspend(struct device *dev)
*/
static int rk808_rtc_resume(struct device *dev)
{
- struct platform_device *pdev = to_platform_device(dev);
- struct rk808_rtc *rk808_rtc = dev_get_drvdata(&pdev->dev);
+ struct rk808_rtc *rk808_rtc = dev_get_drvdata(dev);
if (device_may_wakeup(dev))
disable_irq_wake(rk808_rtc->irq);
@@ -371,22 +359,48 @@ static int rk808_rtc_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(rk808_rtc_pm_ops,
rk808_rtc_suspend, rk808_rtc_resume);
+static struct rk_rtc_compat_reg rk808_creg = {
+ .ctrl_reg = RK808_RTC_CTRL_REG,
+ .status_reg = RK808_RTC_STATUS_REG,
+ .alarm_seconds_reg = RK808_ALARM_SECONDS_REG,
+ .int_reg = RK808_RTC_INT_REG,
+ .seconds_reg = RK808_SECONDS_REG,
+};
+
+static struct rk_rtc_compat_reg rk817_creg = {
+ .ctrl_reg = RK817_RTC_CTRL_REG,
+ .status_reg = RK817_RTC_STATUS_REG,
+ .alarm_seconds_reg = RK817_ALARM_SECONDS_REG,
+ .int_reg = RK817_RTC_INT_REG,
+ .seconds_reg = RK817_SECONDS_REG,
+};
+
static int rk808_rtc_probe(struct platform_device *pdev)
{
struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
struct rk808_rtc *rk808_rtc;
- struct rtc_time tm;
int ret;
rk808_rtc = devm_kzalloc(&pdev->dev, sizeof(*rk808_rtc), GFP_KERNEL);
if (rk808_rtc == NULL)
return -ENOMEM;
+ switch (rk808->variant) {
+ case RK809_ID:
+ case RK817_ID:
+ rk808_rtc->creg = &rk817_creg;
+ break;
+ default:
+ rk808_rtc->creg = &rk808_creg;
+ break;
+ }
platform_set_drvdata(pdev, rk808_rtc);
- rk808_rtc->rk808 = rk808;
+ rk808_rtc->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!rk808_rtc->regmap)
+ return -ENODEV;
/* start rtc running by default, and use shadowed timer. */
- ret = regmap_update_bits(rk808->regmap, RK808_RTC_CTRL_REG,
+ ret = regmap_update_bits(rk808_rtc->regmap, rk808_rtc->creg->ctrl_reg,
BIT_RTC_CTRL_REG_STOP_RTC_M |
BIT_RTC_CTRL_REG_RTC_READSEL_M,
BIT_RTC_CTRL_REG_RTC_READSEL_M);
@@ -396,40 +410,25 @@ static int rk808_rtc_probe(struct platform_device *pdev)
return ret;
}
- ret = regmap_write(rk808->regmap, RK808_RTC_STATUS_REG,
+ ret = regmap_write(rk808_rtc->regmap, rk808_rtc->creg->status_reg,
RTC_STATUS_MASK);
if (ret) {
dev_err(&pdev->dev,
"Failed to write RTC status: %d\n", ret);
- return ret;
- }
-
- /* set init time */
- ret = rk808_rtc_readtime(&pdev->dev, &tm);
- if (ret) {
- dev_err(&pdev->dev, "Failed to read RTC time\n");
return ret;
}
- ret = rtc_valid_tm(&tm);
- if (ret)
- dev_warn(&pdev->dev, "invalid date/time\n");
- device_init_wakeup(&pdev->dev, 1);
+ device_init_wakeup(&pdev->dev, true);
- rk808_rtc->rtc = devm_rtc_device_register(&pdev->dev, "rk808-rtc",
- &rk808_rtc_ops, THIS_MODULE);
- if (IS_ERR(rk808_rtc->rtc)) {
- ret = PTR_ERR(rk808_rtc->rtc);
- return ret;
- }
+ rk808_rtc->rtc = devm_rtc_allocate_device(&pdev->dev);
+ if (IS_ERR(rk808_rtc->rtc))
+ return PTR_ERR(rk808_rtc->rtc);
+
+ rk808_rtc->rtc->ops = &rk808_rtc_ops;
rk808_rtc->irq = platform_get_irq(pdev, 0);
- if (rk808_rtc->irq < 0) {
- if (rk808_rtc->irq != -EPROBE_DEFER)
- dev_err(&pdev->dev, "Wake up is not possible as irq = %d\n",
- rk808_rtc->irq);
+ if (rk808_rtc->irq < 0)
return rk808_rtc->irq;
- }
/* request alarm irq of rk808 */
ret = devm_request_threaded_irq(&pdev->dev, rk808_rtc->irq, NULL,
@@ -438,9 +437,10 @@ static int rk808_rtc_probe(struct platform_device *pdev)
if (ret) {
dev_err(&pdev->dev, "Failed to request alarm IRQ %d: %d\n",
rk808_rtc->irq, ret);
+ return ret;
}
- return ret;
+ return devm_rtc_register_device(rk808_rtc->rtc);
}
static struct platform_driver rk808_rtc_driver = {
generated by cgit (git 2.34.1) at 2025-12-25 01:02:28 +0000