/*
- * Real Time Clock driver for rk808
+ * RTC driver for Rockchip RK808
*
- * Author: zhangqing <zhangqing@rock-chips.com>
+ * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
+ * 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>
#include <linux/kernel.h>
-#include <linux/time.h>
#include <linux/rtc.h>
-#include <linux/slab.h>
#include <linux/bcd.h>
-#include <linux/interrupt.h>
-#include <linux/ioctl.h>
-#include <linux/completion.h>
#include <linux/mfd/rk808.h>
-#include <linux/delay.h>
#include <linux/platform_device.h>
-#include <linux/miscdevice.h>
-#include <linux/irqdomain.h>
-
+#include <linux/i2c.h>
-/* RTC Definitions */
/* RTC_CTRL_REG bitfields */
-#define BIT_RTC_CTRL_REG_STOP_RTC_M 0x01
-#define BIT_RTC_CTRL_REG_ROUND_30S_M 0x02
-#define BIT_RTC_CTRL_REG_AUTO_COMP_M 0x04
-#define BIT_RTC_CTRL_REG_MODE_12_24_M 0x08
-#define BIT_RTC_CTRL_REG_TEST_MODE_M 0x10
-#define BIT_RTC_CTRL_REG_SET_32_COUNTER_M 0x20
-#define BIT_RTC_CTRL_REG_GET_TIME_M 0x40
-#define BIT_RTC_CTRL_REG_RTC_V_OPT_M 0x80
-
-/* RTC_STATUS_REG bitfields */
-#define BIT_RTC_STATUS_REG_RUN_M 0x02
-#define BIT_RTC_STATUS_REG_1S_EVENT_M 0x04
-#define BIT_RTC_STATUS_REG_1M_EVENT_M 0x08
-#define BIT_RTC_STATUS_REG_1H_EVENT_M 0x10
-#define BIT_RTC_STATUS_REG_1D_EVENT_M 0x20
-#define BIT_RTC_STATUS_REG_ALARM_M 0x40
-#define BIT_RTC_STATUS_REG_POWER_UP_M 0x80
-
-/* RTC_INTERRUPTS_REG bitfields */
-#define BIT_RTC_INTERRUPTS_REG_EVERY_M 0x03
-#define BIT_RTC_INTERRUPTS_REG_IT_TIMER_M 0x04
-#define BIT_RTC_INTERRUPTS_REG_IT_ALARM_M 0x08
-
-/* DEVCTRL bitfields */
-#define BIT_RTC_PWDN 0x40
-
-/* REG_SECONDS_REG through REG_YEARS_REG is how many registers? */
-#define ALL_TIME_REGS 7
-#define ALL_ALM_REGS 6
+#define BIT_RTC_CTRL_REG_STOP_RTC_M BIT(0)
+/* RK808 has a shadowed register for saving a "frozen" RTC time.
+ * When user setting "GET_TIME" to 1, the time will save in this shadowed
+ * register. If set "READSEL" to 1, user read rtc time register, actually
+ * get the time of that moment. If we need the real time, clr this bit.
+ */
+#define BIT_RTC_CTRL_REG_RTC_GET_TIME BIT(6)
+#define BIT_RTC_CTRL_REG_RTC_READSEL_M BIT(7)
+#define BIT_RTC_INTERRUPTS_REG_IT_ALARM_M BIT(3)
+#define RTC_STATUS_MASK 0xFE
+
+#define SECONDS_REG_MSK 0x7F
+#define MINUTES_REG_MAK 0x7F
+#define HOURS_REG_MSK 0x3F
+#define DAYS_REG_MSK 0x3F
+#define MONTHS_REG_MSK 0x1F
+#define YEARS_REG_MSK 0xFF
+#define WEEKS_REG_MSK 0x7
-#define RTC_SET_TIME_RETRIES 5
-#define RTC_GET_TIME_RETRIES 5
+/* REG_SECONDS_REG through REG_YEARS_REG is how many registers? */
+#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 rk808_rtc {
struct rk808 *rk808;
struct rtc_device *rtc;
- unsigned int alarm_enabled:1;
+ int irq;
};
/*
- * Read current time and date in RTC
+ * The Rockchip calendar used by the RK808 counts November with 31 days. We use
+ * these translation functions to convert its dates to/from the Gregorian
+ * calendar used by the rest of the world. We arbitrarily define Jan 1st, 2016
+ * as the day when both calendars were in sync, and treat all other dates
+ * relative to that.
+ * NOTE: Other system software (e.g. firmware) that reads the same hardware must
+ * implement this exact same conversion algorithm, with the same anchor date.
*/
+static time64_t nov2dec_transitions(struct rtc_time *tm)
+{
+ return (tm->tm_year + 1900) - 2016 + (tm->tm_mon + 1 > 11 ? 1 : 0);
+}
+
+static void rockchip_to_gregorian(struct rtc_time *tm)
+{
+ /* If it's Nov 31st, rtc_tm_to_time64() will count that like Dec 1st */
+ time64_t time = rtc_tm_to_time64(tm);
+ rtc_time64_to_tm(time + nov2dec_transitions(tm) * 86400, tm);
+}
+
+static void gregorian_to_rockchip(struct rtc_time *tm)
+{
+ time64_t extra_days = nov2dec_transitions(tm);
+ time64_t time = rtc_tm_to_time64(tm);
+ rtc_time64_to_tm(time - extra_days * 86400, tm);
+
+ /* Compensate if we went back over Nov 31st (will work up to 2381) */
+ if (nov2dec_transitions(tm) < extra_days) {
+ if (tm->tm_mon + 1 == 11)
+ tm->tm_mday++; /* This may result in 31! */
+ else
+ rtc_time64_to_tm(time - (extra_days - 1) * 86400, tm);
+ }
+}
+
+/* Read current time and date in RTC */
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;
- unsigned char rtc_data[ALL_TIME_REGS + 1];
- u8 rtc_ctl;
-
- /*Dummy read*/
- ret = rk808_reg_read(rk808, RK808_RTC_CTRL_REG);
-
- /* Has the RTC been programmed? */
- ret = rk808_reg_read(rk808, RK808_RTC_CTRL_REG);
- if (ret < 0) {
- dev_err(dev, "Failed to read RTC control: %d\n", ret);
- return ret;
- }
-
- rtc_ctl = ret & (~BIT_RTC_CTRL_REG_RTC_V_OPT_M);
- ret = rk808_reg_write(rk808, RK808_RTC_CTRL_REG, rtc_ctl);
- if (ret < 0) {
- dev_err(dev, "Failed to write RTC control: %d\n", ret);
+ /* Force an update of the shadowed registers right now */
+ ret = regmap_update_bits(rk808->regmap, RK808_RTC_CTRL_REG,
+ BIT_RTC_CTRL_REG_RTC_GET_TIME,
+ BIT_RTC_CTRL_REG_RTC_GET_TIME);
+ if (ret) {
+ dev_err(dev, "Failed to update bits rtc_ctrl: %d\n", ret);
return ret;
}
-#if 0
- /* Read twice to make sure we don't read a corrupt, partially
- * incremented, value.
+ /*
+ * After we set the GET_TIME bit, the rtc time can't be read
+ * immediately. So we should wait up to 31.25 us, about one cycle of
+ * 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.
*/
- do {
- ret = rk808_bulk_read(rk808, RK808_SECONDS_REG,
- ALL_TIME_REGS, rtc_data);
- if (ret != 0)
- continue;
-
- tm->tm_sec = bcd2bin(rtc_data[0]);
- tm->tm_min = bcd2bin(rtc_data[1]);
- tm->tm_hour = bcd2bin(rtc_data[2]) ;
- tm->tm_mday = bcd2bin(rtc_data[3]);
- tm->tm_mon = bcd2bin(rtc_data[4]) - 1;
- tm->tm_year = bcd2bin(rtc_data[5]) + 100;
- tm->tm_wday = bcd2bin(rtc_data[6]);
-
- printk( "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);
-
+ ret = regmap_update_bits(rk808->regmap, RK808_RTC_CTRL_REG,
+ BIT_RTC_CTRL_REG_RTC_GET_TIME,
+ 0);
+ if (ret) {
+ dev_err(dev, "Failed to update bits rtc_ctrl: %d\n", ret);
return ret;
+ }
- } while (++count < RTC_GET_TIME_RETRIES);
- dev_err(dev, "Timed out reading current time\n");
-#else
- rtc_data[0] = rk808_reg_read(rk808,0x00);
- rtc_data[1] = rk808_reg_read(rk808,0x01);
- rtc_data[2] = rk808_reg_read(rk808,0x02);
- rtc_data[3] = rk808_reg_read(rk808,0x03);
- rtc_data[4] = rk808_reg_read(rk808,0x04);
- rtc_data[5] = rk808_reg_read(rk808,0x05);
- rtc_data[6] = rk808_reg_read(rk808,0x06);
-
- tm->tm_sec = bcd2bin(rtc_data[0]);
- tm->tm_min = bcd2bin(rtc_data[1]);
- tm->tm_hour = bcd2bin(rtc_data[2]) ;
- tm->tm_mday = bcd2bin(rtc_data[3]);
- tm->tm_mon = bcd2bin(rtc_data[4]) - 1;
- tm->tm_year = bcd2bin(rtc_data[5]) + 100;
- tm->tm_wday = bcd2bin(rtc_data[6]);
-
- 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);
+ ret = regmap_bulk_read(rk808->regmap, RK808_SECONDS_REG,
+ rtc_data, NUM_TIME_REGS);
+ if (ret) {
+ dev_err(dev, "Failed to bulk read rtc_data: %d\n", ret);
+ return ret;
+ }
-#endif
- return 0;
+ tm->tm_sec = bcd2bin(rtc_data[0] & SECONDS_REG_MSK);
+ tm->tm_min = bcd2bin(rtc_data[1] & MINUTES_REG_MAK);
+ tm->tm_hour = bcd2bin(rtc_data[2] & HOURS_REG_MSK);
+ tm->tm_mday = bcd2bin(rtc_data[3] & DAYS_REG_MSK);
+ tm->tm_mon = (bcd2bin(rtc_data[4] & MONTHS_REG_MSK)) - 1;
+ 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);
+ return ret;
}
-/*
- * Set current time and date in RTC
- */
+/* Set current time and date in RTC */
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;
- u8 rtc_ctl;
- unsigned char rtc_data[ALL_TIME_REGS + 1];
-
+
+ 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);
+ gregorian_to_rockchip(tm);
rtc_data[0] = bin2bcd(tm->tm_sec);
rtc_data[1] = bin2bcd(tm->tm_min);
- rtc_data[2] = bin2bcd(tm->tm_hour );
+ rtc_data[2] = bin2bcd(tm->tm_hour);
rtc_data[3] = bin2bcd(tm->tm_mday);
rtc_data[4] = bin2bcd(tm->tm_mon + 1);
rtc_data[5] = bin2bcd(tm->tm_year - 100);
rtc_data[6] = bin2bcd(tm->tm_wday);
- 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);
-
- /*Dummy read*/
- ret = rk808_reg_read(rk808, RK808_RTC_CTRL_REG);
-
- /* Stop RTC while updating the TC registers */
- ret = rk808_reg_read(rk808, RK808_RTC_CTRL_REG);
- if (ret < 0) {
- dev_err(dev, "Failed to read RTC control: %d\n", ret);
+ /* Stop RTC while updating the RTC registers */
+ ret = regmap_update_bits(rk808->regmap, RK808_RTC_CTRL_REG,
+ BIT_RTC_CTRL_REG_STOP_RTC_M,
+ BIT_RTC_CTRL_REG_STOP_RTC_M);
+ if (ret) {
+ dev_err(dev, "Failed to update RTC control: %d\n", ret);
return ret;
}
-
- rtc_ctl = ret | (BIT_RTC_CTRL_REG_STOP_RTC_M);
- ret = rk808_reg_write(rk808, RK808_RTC_CTRL_REG, rtc_ctl);
- if (ret < 0) {
- dev_err(dev, "Failed to write RTC control: %d\n", ret);
- return ret;
- }
-#if 0
- /* update all the time registers in one shot */
- ret = rk808_bulk_write(rk808, RK808_SECONDS_REG,
- ALL_TIME_REGS, rtc_data);
- if (ret < 0) {
- dev_err(dev, "Failed to read RTC times: %d\n", ret);
+ ret = regmap_bulk_write(rk808->regmap, RK808_SECONDS_REG,
+ rtc_data, NUM_TIME_REGS);
+ if (ret) {
+ dev_err(dev, "Failed to bull write rtc_data: %d\n", ret);
return ret;
}
-#else
- rk808_reg_write(rk808,0x00,rtc_data[0]);
- rk808_reg_write(rk808,0x01,rtc_data[1]);
- rk808_reg_write(rk808,0x02,rtc_data[2]);
- rk808_reg_write(rk808,0x03,rtc_data[3]);
- rk808_reg_write(rk808,0x04,rtc_data[4]);
- rk808_reg_write(rk808,0x05,rtc_data[5]);
- rk808_reg_write(rk808,0x06,rtc_data[6]);
-
-#endif
- /*Dummy read*/
- ret = rk808_reg_read(rk808, RK808_RTC_CTRL_REG);
-
/* Start RTC again */
- ret = rk808_reg_read(rk808, RK808_RTC_CTRL_REG);
- if (ret < 0) {
- dev_err(dev, "Failed to read RTC control: %d\n", ret);
- return ret;
- }
-
- rtc_ctl = ret &(~ BIT_RTC_CTRL_REG_STOP_RTC_M);
-
- ret = rk808_reg_write(rk808, RK808_RTC_CTRL_REG, rtc_ctl);
- if (ret < 0) {
- dev_err(dev, "Failed to write RTC control: %d\n", ret);
+ ret = regmap_update_bits(rk808->regmap, RK808_RTC_CTRL_REG,
+ BIT_RTC_CTRL_REG_STOP_RTC_M, 0);
+ if (ret) {
+ dev_err(dev, "Failed to update RTC control: %d\n", ret);
return ret;
}
-
return 0;
}
-/*
- * Read alarm time and date in RTC
- */
+/* Read alarm time and date in RTC */
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;
- unsigned char alrm_data[ALL_ALM_REGS + 1];
-#if 0
- ret = rk808_bulk_read(rk808_rtc->rk808, RK808_ALARM_SECONDS_REG,
- ALL_ALM_REGS, alrm_data);
- if (ret != 0) {
- dev_err(dev, "Failed to read alarm time: %d\n", ret);
- return ret;
- }
-#else
- alrm_data[0] = rk808_reg_read(rk808_rtc->rk808,0x08);
- alrm_data[1] = rk808_reg_read(rk808_rtc->rk808,0x09);
- alrm_data[2] = rk808_reg_read(rk808_rtc->rk808,0x0a);
- alrm_data[3] = rk808_reg_read(rk808_rtc->rk808,0x0b);
- alrm_data[4] = rk808_reg_read(rk808_rtc->rk808,0x0c);
- alrm_data[5] = rk808_reg_read(rk808_rtc->rk808,0x0d);
-
-
-#endif
- /* some of these fields may be wildcard/"match all" */
- alrm->time.tm_sec = bcd2bin(alrm_data[0]);
- alrm->time.tm_min = bcd2bin(alrm_data[1]);
- alrm->time.tm_hour = bcd2bin(alrm_data[2]);
- alrm->time.tm_mday = bcd2bin(alrm_data[3]);
- alrm->time.tm_mon = bcd2bin(alrm_data[4]) - 1;
- alrm->time.tm_year = bcd2bin(alrm_data[5]) + 100;
-
- ret = rk808_reg_read(rk808_rtc->rk808, RK808_RTC_INT_REG);
- if (ret < 0) {
- dev_err(dev, "Failed to read RTC control: %d\n", ret);
+
+ ret = regmap_bulk_read(rk808->regmap, RK808_ALARM_SECONDS_REG,
+ alrm_data, NUM_ALARM_REGS);
+
+ alrm->time.tm_sec = bcd2bin(alrm_data[0] & SECONDS_REG_MSK);
+ alrm->time.tm_min = bcd2bin(alrm_data[1] & MINUTES_REG_MAK);
+ alrm->time.tm_hour = bcd2bin(alrm_data[2] & HOURS_REG_MSK);
+ alrm->time.tm_mday = bcd2bin(alrm_data[3] & DAYS_REG_MSK);
+ alrm->time.tm_mon = (bcd2bin(alrm_data[4] & MONTHS_REG_MSK)) - 1;
+ 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);
+ 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 %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);
- if (ret & BIT_RTC_INTERRUPTS_REG_IT_ALARM_M)
- alrm->enabled = 1;
- else
- alrm->enabled = 0;
+ alrm->enabled = (int_reg & BIT_RTC_INTERRUPTS_REG_IT_ALARM_M) ? 1 : 0;
return 0;
}
static int rk808_rtc_stop_alarm(struct rk808_rtc *rk808_rtc)
{
- rk808_rtc->alarm_enabled = 0;
+ struct rk808 *rk808 = rk808_rtc->rk808;
+ int ret;
- return rk808_clear_bits(rk808_rtc->rk808, RK808_RTC_INT_REG,
- BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
+ ret = regmap_update_bits(rk808->regmap, RK808_RTC_INT_REG,
+ BIT_RTC_INTERRUPTS_REG_IT_ALARM_M, 0);
+ return ret;
}
static int rk808_rtc_start_alarm(struct rk808_rtc *rk808_rtc)
{
- rk808_rtc->alarm_enabled = 1;
+ struct rk808 *rk808 = rk808_rtc->rk808;
+ int ret;
- return rk808_set_bits(rk808_rtc->rk808, RK808_RTC_INT_REG,
- BIT_RTC_INTERRUPTS_REG_IT_ALARM_M,BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
+ ret = regmap_update_bits(rk808->regmap, RK808_RTC_INT_REG,
+ BIT_RTC_INTERRUPTS_REG_IT_ALARM_M,
+ BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
+ return ret;
}
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;
- unsigned char alrm_data[ALL_TIME_REGS + 1];
-
+
ret = rk808_rtc_stop_alarm(rk808_rtc);
- if (ret < 0) {
+ if (ret) {
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 %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);
-
+ gregorian_to_rockchip(&alrm->time);
alrm_data[0] = bin2bcd(alrm->time.tm_sec);
alrm_data[1] = bin2bcd(alrm->time.tm_min);
- alrm_data[2] = bin2bcd(alrm->time.tm_hour );
+ alrm_data[2] = bin2bcd(alrm->time.tm_hour);
alrm_data[3] = bin2bcd(alrm->time.tm_mday);
alrm_data[4] = bin2bcd(alrm->time.tm_mon + 1);
alrm_data[5] = bin2bcd(alrm->time.tm_year - 100);
-#if 0
- ret = rk808_bulk_write(rk808_rtc->rk808, RK808_ALARM_SECONDS_REG,
- ALL_ALM_REGS, alrm_data);
- if (ret != 0) {
- dev_err(dev, "Failed to read alarm time: %d\n", ret);
+
+ ret = regmap_bulk_write(rk808->regmap, RK808_ALARM_SECONDS_REG,
+ alrm_data, NUM_ALARM_REGS);
+ if (ret) {
+ dev_err(dev, "Failed to bulk write: %d\n", ret);
return ret;
}
-#else
- rk808_reg_write(rk808_rtc->rk808,0x08,alrm_data[0]);
- rk808_reg_write(rk808_rtc->rk808,0x09,alrm_data[1]);
- rk808_reg_write(rk808_rtc->rk808,0x0a,alrm_data[2]);
- rk808_reg_write(rk808_rtc->rk808,0x0b,alrm_data[3]);
- rk808_reg_write(rk808_rtc->rk808,0x0c,alrm_data[4]);
- rk808_reg_write(rk808_rtc->rk808,0x0d,alrm_data[5]);
-
-#endif
if (alrm->enabled) {
ret = rk808_rtc_start_alarm(rk808_rtc);
- if (ret < 0) {
+ if (ret) {
dev_err(dev, "Failed to start alarm: %d\n", ret);
return ret;
}
}
-
return 0;
}
static int rk808_rtc_alarm_irq_enable(struct device *dev,
- unsigned int enabled)
+ unsigned int enabled)
{
struct rk808_rtc *rk808_rtc = dev_get_drvdata(dev);
if (enabled)
return rk808_rtc_start_alarm(rk808_rtc);
- else
- return rk808_rtc_stop_alarm(rk808_rtc);
-}
-
-static int rk808_rtc_update_irq_enable(struct device *dev,
- unsigned int enabled)
-{
- struct rk808_rtc *rk808_rtc = dev_get_drvdata(dev);
- if (enabled)
- return rk808_set_bits(rk808_rtc->rk808, RK808_RTC_INT_REG,
- BIT_RTC_INTERRUPTS_REG_IT_TIMER_M,BIT_RTC_INTERRUPTS_REG_IT_TIMER_M);
- else
- return rk808_clear_bits(rk808_rtc->rk808, RK808_RTC_INT_REG,
- BIT_RTC_INTERRUPTS_REG_IT_TIMER_M);
+ return rk808_rtc_stop_alarm(rk808_rtc);
}
/*
* bit 2: every hour
* bit 3: every day
*/
-#if 0
-static int rk808_rtc_irq_set_freq(struct device *dev, int freq)
-{
- struct rk808_rtc *rk808_rtc = dev_get_drvdata(dev);
- int ret;
- u8 rtc_ctl;
-
- if (freq < 0 || freq > 3)
- return -EINVAL;
-
- ret = rk808_reg_read(rk808_rtc->rk808, RK808_RTC_INT_REG);
- if (ret < 0) {
- dev_err(dev, "Failed to read RTC interrupt: %d\n", ret);
- return ret;
- }
-
- rtc_ctl = ret | freq;
-
- ret = rk808_reg_write(rk808_rtc->rk808, RK808_RTC_INT_REG, rtc_ctl);
- if (ret < 0) {
- dev_err(dev, "Failed to write RTC control: %d\n", ret);
- return ret;
- }
-
- return ret;
-}
-#endif
-static irqreturn_t rk808_alm_irq(int irq, void *data)
+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;
- u8 rtc_ctl;
-
- /*Dummy read -- mandatory for status register*/
- ret = rk808_reg_read(rk808_rtc->rk808, RK808_RTC_STATUS_REG);
- if (ret < 0) {
- printk("%s:Failed to read RTC status: %d\n", __func__, ret);
- return ret;
- }
-
- ret = rk808_reg_read(rk808_rtc->rk808, RK808_RTC_STATUS_REG);
- if (ret < 0) {
- printk("%s:Failed to read RTC status: %d\n", __func__, ret);
- return ret;
- }
- rtc_ctl = ret&0xff;
- //The alarm interrupt keeps its low level, until the micro-controller write 1 in the ALARM bit of the RTC_STATUS_REG register.
- ret = rk808_reg_write(rk808_rtc->rk808, RK808_RTC_STATUS_REG,rtc_ctl);
- if (ret < 0) {
- printk("%s:Failed to read RTC status: %d\n", __func__, ret);
+ ret = regmap_write(rk808->regmap, RK808_RTC_STATUS_REG,
+ RTC_STATUS_MASK);
+ if (ret) {
+ dev_err(&client->dev,
+ "%s:Failed to update RTC status: %d\n", __func__, ret);
return ret;
}
-
- rtc_update_irq(rk808_rtc->rtc, 1, RTC_IRQF | RTC_AF);
-
- printk("%s:irq=%d,rtc_ctl=0x%x\n",__func__,irq,rtc_ctl);
- return IRQ_HANDLED;
-}
-
-static irqreturn_t rk808_per_irq(int irq, void *data)
-{
- struct rk808_rtc *rk808_rtc = data;
-
- rtc_update_irq(rk808_rtc->rtc, 1, RTC_IRQF | RTC_UF);
- //printk("%s:irq=%d\n",__func__,irq);
+ rtc_update_irq(rk808_rtc->rtc, 1, RTC_IRQF | RTC_AF);
+ dev_dbg(&client->dev,
+ "%s:irq=%d\n", __func__, irq);
return IRQ_HANDLED;
}
static const struct rtc_class_ops rk808_rtc_ops = {
.read_time = rk808_rtc_readtime,
- //.set_mmss = rk808_rtc_set_mmss,
.set_time = rk808_rtc_set_time,
.read_alarm = rk808_rtc_readalarm,
.set_alarm = rk808_rtc_setalarm,
.alarm_irq_enable = rk808_rtc_alarm_irq_enable,
- //.update_irq_enable = rk808_rtc_update_irq_enable,
- //.irq_set_freq = rk808_rtc_irq_set_freq,
};
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
/* 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);
- int ret;
-
- if (rk808_rtc->alarm_enabled && device_may_wakeup(&pdev->dev))
- ret = rk808_rtc_start_alarm(rk808_rtc);
- else
- ret = rk808_rtc_stop_alarm(rk808_rtc);
- if (ret < 0)
- dev_err(&pdev->dev, "Failed to update RTC alarm: %d\n", ret);
+ if (device_may_wakeup(dev))
+ enable_irq_wake(rk808_rtc->irq);
return 0;
}
{
struct platform_device *pdev = to_platform_device(dev);
struct rk808_rtc *rk808_rtc = dev_get_drvdata(&pdev->dev);
- int ret;
- if (rk808_rtc->alarm_enabled) {
- ret = rk808_rtc_start_alarm(rk808_rtc);
- if (ret <0)
- dev_err(&pdev->dev,
- "Failed to restart RTC alarm: %d\n", ret);
- }
+ if (device_may_wakeup(dev))
+ disable_irq_wake(rk808_rtc->irq);
return 0;
}
+#endif
-/* Unconditionally disable the alarm */
-static int rk808_rtc_freeze(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
- struct rk808_rtc *rk808_rtc = dev_get_drvdata(&pdev->dev);
- int ret;
-
- ret = rk808_rtc_stop_alarm(rk808_rtc);
- if (ret < 0)
- dev_err(&pdev->dev, "Failed to stop RTC alarm: %d\n", ret);
+static SIMPLE_DEV_PM_OPS(rk808_rtc_pm_ops,
+ rk808_rtc_suspend, rk808_rtc_resume);
- return 0;
-}
-#else
-#define rk808_rtc_suspend NULL
-#define rk808_rtc_resume NULL
-#define rk808_rtc_freeze NULL
-#endif
-extern struct rk808 *g_rk808;
-struct platform_device *rk808_pdev;
-struct rtc_time tm_def = { // 2012.1.1 12:00:00 Saturday
- .tm_wday = 6,
- .tm_year = 112,
- .tm_mon = 0,
- .tm_mday = 1,
- .tm_hour = 12,
- .tm_min = 0,
- .tm_sec = 0,
-};
-
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 per_irq;
- int alm_irq;
- int ret = 0;
- u8 rtc_ctl;
-
- printk("%s,line=%d\n", __func__,__LINE__);
+ int ret;
- rk808_rtc = kzalloc(sizeof(*rk808_rtc), GFP_KERNEL);
+ rk808_rtc = devm_kzalloc(&pdev->dev, sizeof(*rk808_rtc), GFP_KERNEL);
if (rk808_rtc == NULL)
return -ENOMEM;
platform_set_drvdata(pdev, rk808_rtc);
rk808_rtc->rk808 = rk808;
-
- /* Take rtc out of reset */
- /*
- ret = rk808_reg_read(rk808, RK808_DEVCTRL);
- if (ret < 0) {
- dev_err(&pdev->dev, "Failed to read RK808_DEVCTRL: %d\n", ret);
- return ret;
- }
-
- if(ret & BIT_RTC_PWDN)
- {
- rtc_ctl = ret & (~BIT_RTC_PWDN);
-
- ret = rk808_reg_write(rk808, RK808_DEVCTRL, rtc_ctl);
- if (ret < 0) {
- dev_err(&pdev->dev, "Failed to write RTC control: %d\n", ret);
- return ret;
- }
- }
- */
- /*start rtc default*/
- ret = rk808_reg_read(rk808, RK808_RTC_CTRL_REG);
- if (ret < 0) {
- dev_err(&pdev->dev, "Failed to read RTC control: %d\n", ret);
+
+ /* start rtc running by default, and use shadowed timer. */
+ ret = regmap_update_bits(rk808->regmap, RK808_RTC_CTRL_REG,
+ BIT_RTC_CTRL_REG_STOP_RTC_M |
+ BIT_RTC_CTRL_REG_RTC_READSEL_M,
+ BIT_RTC_CTRL_REG_RTC_READSEL_M);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "Failed to update RTC control: %d\n", ret);
return ret;
}
- rtc_ctl = ret & (~BIT_RTC_CTRL_REG_STOP_RTC_M);
- ret = rk808_reg_write(rk808, RK808_RTC_CTRL_REG, rtc_ctl);
- if (ret < 0) {
- dev_err(&pdev->dev, "Failed to write RTC control: %d\n", ret);
+ ret = regmap_write(rk808->regmap, RK808_RTC_STATUS_REG,
+ RTC_STATUS_MASK);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "Failed to write RTC status: %d\n", ret);
return ret;
- }
-
- ret = rk808_reg_read(rk808, RK808_RTC_STATUS_REG);
- if (ret < 0) {
- dev_err(&pdev->dev, "Failed to read RTC status: %d\n", ret);
- return ret;
}
- rk808_reg_write(rk808,RK808_RTC_STATUS_REG,0xfe);
- /*set init time*/
+ /* set init time */
ret = rk808_rtc_readtime(&pdev->dev, &tm);
- if (ret<0)
- {
+ if (ret) {
dev_err(&pdev->dev, "Failed to read RTC time\n");
return ret;
}
-
ret = rtc_valid_tm(&tm);
- if (ret) {
- dev_err(&pdev->dev,"invalid date/time and init time\n");
- rk808_rtc_set_time(&pdev->dev, &tm_def); // 2012-01-01 12:00:00
-// DBG( "set RTC date/time %4d-%02d-%02d(%d) %02d:%02d:%02d\n",1900 + tm_def.tm_year, tm_def.tm_mon + 1, tm_def.tm_mday, tm_def.tm_wday,tm_def.tm_hour, tm_def.tm_min, tm_def.tm_sec);
- }
+ if (ret)
+ dev_warn(&pdev->dev, "invalid date/time\n");
device_init_wakeup(&pdev->dev, 1);
- rk808_rtc->rtc = rtc_device_register("rk808", &pdev->dev,
- &rk808_rtc_ops, THIS_MODULE);
+ 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);
- goto err;
+ return ret;
}
-
- per_irq = irq_create_mapping(rk808->irq_domain, RK808_IRQ_RTC_PERIOD);
- alm_irq = irq_create_mapping(rk808->irq_domain, RK808_IRQ_RTC_ALARM);
-
- /*request rtc and alarm irq of rk808*/
- ret = devm_request_threaded_irq(rk808->dev,per_irq, NULL, rk808_per_irq,
- IRQF_TRIGGER_RISING, "RTC period",
- rk808_rtc);
- if (ret != 0) {
- dev_err(&pdev->dev, "Failed to request periodic IRQ %d: %d\n",
- per_irq, ret);
+
+ 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);
+ return rk808_rtc->irq;
}
- ret = devm_request_threaded_irq(rk808->dev,alm_irq, NULL, rk808_alm_irq,
- IRQF_TRIGGER_RISING, "RTC alarm",
- rk808_rtc);
- if (ret != 0) {
+ /* request alarm irq of rk808 */
+ ret = devm_request_threaded_irq(&pdev->dev, rk808_rtc->irq, NULL,
+ rk808_alarm_irq, 0,
+ "RTC alarm", rk808_rtc);
+ if (ret) {
dev_err(&pdev->dev, "Failed to request alarm IRQ %d: %d\n",
- alm_irq, ret);
+ rk808_rtc->irq, ret);
}
- //for rtc irq test
- /*
- rk808_set_bits(rk808_rtc->rk808, RK808_RTC_STATUS_REG,(0x1<< 6),(0x1 <<6));
- rk808_set_bits(rk808_rtc->rk808, RK808_RTC_INT_REG,0x0c,0x0c);
- rk808_set_bits(rk808_rtc->rk808,RK808_INT_STS_REG1,(0x3 << 5),(0x3 <<5));
- rk808_set_bits(rk808_rtc->rk808, RK808_INT_STS_MSK_REG1,(0x3 <<5),0);
-*/
-
-// enable_irq_wake(alm_irq); // so rk808 alarm irq can wake up system
- rk808_pdev = pdev;
-
- printk("%s:ok\n",__func__);
-
- return 0;
-
-err:
- kfree(rk808_rtc);
return ret;
}
-static int rk808_rtc_remove(struct platform_device *pdev)
-{
- struct rk808_rtc *rk808_rtc = platform_get_drvdata(pdev);
- int per_irq = rk808_rtc->rk808->irq_base + RK808_IRQ_RTC_PERIOD;
- int alm_irq = rk808_rtc->rk808->irq_base + RK808_IRQ_RTC_ALARM;
-
- free_irq(alm_irq, rk808_rtc);
- free_irq(per_irq, rk808_rtc);
- rtc_device_unregister(rk808_rtc->rtc);
- kfree(rk808_rtc);
-
- return 0;
-}
-
-static const struct dev_pm_ops rk808_rtc_pm_ops = {
- .suspend = rk808_rtc_suspend,
- .resume = rk808_rtc_resume,
-
- .freeze = rk808_rtc_freeze,
- .thaw = rk808_rtc_resume,
- .restore = rk808_rtc_resume,
-
- .poweroff = rk808_rtc_suspend,
-};
-
static struct platform_driver rk808_rtc_driver = {
.probe = rk808_rtc_probe,
- .remove = rk808_rtc_remove,
.driver = {
.name = "rk808-rtc",
.pm = &rk808_rtc_pm_ops,
},
};
-static ssize_t rtc_rk808_test_write(struct file *file,
- const char __user *buf, size_t count, loff_t *offset)
-{
- char nr_buf[8];
- int nr = 0, ret;
- struct platform_device *pdev;
- struct rtc_time tm;
- struct rtc_wkalrm alrm;
- struct rk808_rtc *rk808_rtc;
-
- if(count > 3)
- return -EFAULT;
- ret = copy_from_user(nr_buf, buf, count);
- if(ret < 0)
- return -EFAULT;
-
- sscanf(nr_buf, "%d", &nr);
- if(nr > 5 || nr < 0)
- {
- printk("%s:data is error\n",__func__);
- return -EFAULT;
- }
-
- if(!rk808_pdev)
- return -EFAULT;
- else
- pdev = rk808_pdev;
-
-
- rk808_rtc = dev_get_drvdata(&pdev->dev);
-
- //test rtc time
- if(nr == 0)
- {
- tm.tm_wday = 6;
- tm.tm_year = 111;
- tm.tm_mon = 0;
- tm.tm_mday = 1;
- tm.tm_hour = 12;
- tm.tm_min = 0;
- tm.tm_sec = 0;
-
- ret = rk808_rtc_set_time(&pdev->dev, &tm); // 2011-01-01 12:00:00
- if (ret)
- {
- dev_err(&pdev->dev, "Failed to set RTC time\n");
- return -EFAULT;
- }
-
- }
-
- /*set init time*/
- ret = rk808_rtc_readtime(&pdev->dev, &tm);
- if (ret)
- dev_err(&pdev->dev, "Failed to read RTC time\n");
- else
- dev_info(&pdev->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);
-
- if(!ret)
- printk("%s:ok\n",__func__);
- else
- printk("%s:error\n",__func__);
-
-
- //test rtc alarm
- if(nr == 2)
- {
- //2000-01-01 00:00:30
- if(tm.tm_sec < 30)
- {
- alrm.time.tm_sec = tm.tm_sec+30;
- alrm.time.tm_min = tm.tm_min;
- }
- else
- {
- alrm.time.tm_sec = tm.tm_sec-30;
- alrm.time.tm_min = tm.tm_min+1;
- }
- alrm.time.tm_hour = tm.tm_hour;
- alrm.time.tm_mday = tm.tm_mday;
- alrm.time.tm_mon = tm.tm_mon;
- alrm.time.tm_year = tm.tm_year;
- rk808_rtc_alarm_irq_enable(&pdev->dev, 1);
- rk808_rtc_setalarm(&pdev->dev, &alrm);
-
- dev_info(&pdev->dev, "Set alarm %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);
- }
-
-
- if(nr == 3)
- {
- ret = rk808_reg_read(rk808_rtc->rk808, RK808_RTC_STATUS_REG);
- if (ret < 0) {
- printk("%s:Failed to read RTC status: %d\n", __func__, ret);
- return ret;
- }
- printk("%s:ret=0x%x\n",__func__,ret&0xff);
-
- ret = rk808_reg_write(rk808_rtc->rk808, RK808_RTC_STATUS_REG, ret&0xff);
- if (ret < 0) {
- printk("%s:Failed to read RTC status: %d\n", __func__, ret);
- return ret;
- }
- }
-
- if(nr == 4)
- rk808_rtc_update_irq_enable(&pdev->dev, 1);
-
- if(nr == 5)
- rk808_rtc_update_irq_enable(&pdev->dev, 0);
-
- return count;
-}
-
-static const struct file_operations rtc_rk808_test_fops = {
- .write = rtc_rk808_test_write,
-};
-
-static struct miscdevice rtc_rk808_test_misc = {
- .minor = MISC_DYNAMIC_MINOR,
- .name = "rtc_rk808_test",
- .fops = &rtc_rk808_test_fops,
-};
-
-
-static int __init rk808_rtc_init(void)
-{
- misc_register(&rtc_rk808_test_misc);
- return platform_driver_register(&rk808_rtc_driver);
-}
-subsys_initcall_sync(rk808_rtc_init);
-
-static void __exit rk808_rtc_exit(void)
-{
- misc_deregister(&rtc_rk808_test_misc);
- platform_driver_unregister(&rk808_rtc_driver);
-}
-module_exit(rk808_rtc_exit);
+module_platform_driver(rk808_rtc_driver);
MODULE_DESCRIPTION("RTC driver for the rk808 series PMICs");
-MODULE_AUTHOR("ZHANGQING <zhanqging@rock-chips.com>");
+MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
+MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:rk808-rtc");
projects / firefly-linux-kernel-4.4.55.git / blobdiff