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Subject[PATCH v8 4/5] rtc: rk808: add RK809 and RK817 support.
Date
From: Tony Xie <tony.xie@rock-chips.com>

RK809 and RK817 are power management IC chips for multimedia products.
Most of their functions and registers are same, including the rtc.

Signed-off-by: Tony Xie <tony.xie@rock-chips.com>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---
drivers/rtc/Kconfig | 4 +--
drivers/rtc/rtc-rk808.c | 68 ++++++++++++++++++++++++++++++++---------
2 files changed, 56 insertions(+), 16 deletions(-)

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index f933c06bff4f..6a7b367be26c 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -373,11 +373,11 @@ config RTC_DRV_MAX77686
will be called rtc-max77686.

config RTC_DRV_RK808
- tristate "Rockchip RK805/RK808/RK818 RTC"
+ tristate "Rockchip RK805/RK808/RK809/RK817/RK818 RTC"
depends on MFD_RK808
help
If you say yes here you will get support for the
- RTC of RK805, RK808 and RK818 PMIC.
+ RTC of RK805, RK809 and RK817, RK808 and RK818 PMIC.

This driver can also be built as a module. If so, the module
will be called rk808-rtc.
diff --git a/drivers/rtc/rtc-rk808.c b/drivers/rtc/rtc-rk808.c
index 1fb864d4ef83..4e95b6a0a68e 100644
--- a/drivers/rtc/rtc-rk808.c
+++ b/drivers/rtc/rtc-rk808.c
@@ -50,9 +50,18 @@
#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 rtc_device *rtc;
+ struct rk_rtc_compat_reg *creg;
int irq;
};

@@ -101,7 +110,7 @@ static int rk808_rtc_readtime(struct device *dev, struct rtc_time *tm)
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->regmap, rk808_rtc->creg->ctrl_reg,
BIT_RTC_CTRL_REG_RTC_GET_TIME,
BIT_RTC_CTRL_REG_RTC_GET_TIME);
if (ret) {
@@ -115,7 +124,7 @@ 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->regmap, rk808_rtc->creg->ctrl_reg,
BIT_RTC_CTRL_REG_RTC_GET_TIME,
0);
if (ret) {
@@ -123,7 +132,7 @@ 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->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);
@@ -162,7 +171,7 @@ 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->regmap, rk808_rtc->creg->ctrl_reg,
BIT_RTC_CTRL_REG_STOP_RTC_M,
BIT_RTC_CTRL_REG_STOP_RTC_M);
if (ret) {
@@ -170,14 +179,14 @@ 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->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->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);
@@ -195,8 +204,13 @@ static int rk808_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
uint32_t int_reg;
int ret;

- ret = regmap_bulk_read(rk808->regmap, RK808_ALARM_SECONDS_REG,
+ ret = regmap_bulk_read(rk808->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);
@@ -206,7 +220,7 @@ 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->regmap, rk808_rtc->creg->int_reg, &int_reg);
if (ret) {
dev_err(dev, "Failed to read RTC INT REG: %d\n", ret);
return ret;
@@ -225,7 +239,7 @@ 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->regmap, rk808_rtc->creg->int_reg,
BIT_RTC_INTERRUPTS_REG_IT_ALARM_M, 0);

return ret;
@@ -236,7 +250,7 @@ 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->regmap, rk808_rtc->creg->int_reg,
BIT_RTC_INTERRUPTS_REG_IT_ALARM_M,
BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);

@@ -266,7 +280,8 @@ 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->regmap,
+ rk808_rtc->creg->alarm_seconds_reg,
alrm_data, NUM_ALARM_REGS);
if (ret) {
dev_err(dev, "Failed to bulk write: %d\n", ret);
@@ -310,7 +325,7 @@ static irqreturn_t rk808_alarm_irq(int irq, void *data)
struct i2c_client *client = rk808->i2c;
int ret;

- ret = regmap_write(rk808->regmap, RK808_RTC_STATUS_REG,
+ ret = regmap_write(rk808->regmap, rk808_rtc->creg->status_reg,
RTC_STATUS_MASK);
if (ret) {
dev_err(&client->dev,
@@ -363,6 +378,22 @@ 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);
@@ -373,11 +404,20 @@ static int rk808_rtc_probe(struct platform_device *pdev)
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;

/* start rtc running by default, and use shadowed timer. */
- ret = regmap_update_bits(rk808->regmap, RK808_RTC_CTRL_REG,
+ ret = regmap_update_bits(rk808->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);
@@ -387,7 +427,7 @@ static int rk808_rtc_probe(struct platform_device *pdev)
return ret;
}

- ret = regmap_write(rk808->regmap, RK808_RTC_STATUS_REG,
+ ret = regmap_write(rk808->regmap, rk808_rtc->creg->status_reg,
RTC_STATUS_MASK);
if (ret) {
dev_err(&pdev->dev,
--
2.20.1
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