On 5/30/2023 9:41 AM, Joy Zou wrote:
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Adding support for pcf2131 RTC chip.
The pcf2131 is similar to the pcf2127. The driver support rtc register read/write by using rtc cmd and rtc date set/get by using date cmd.
Signed-off-by: Joy Zou joy.zou@nxp.com
drivers/rtc/Kconfig | 10 +++ drivers/rtc/Makefile | 1 + drivers/rtc/pcf2131.c | 189 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 200 insertions(+) create mode 100644 drivers/rtc/pcf2131.c
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 23173139e0..507dc6cbcb 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -64,6 +64,16 @@ config RTC_PCF2127 has a selectable I2C-bus or SPI-bus, a backup battery switch-over circuit, a programmable watchdog function, a timestamp function, and many other features.
+config RTC_PCF2131
bool "Enable PCF2131 driver"depends on DM_RTChelpThe PCF2131 is a CMOS Real Time Clock (RTC) and calendar with an integratedTemperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768 kHz quartzcrystal optimized for very high accuracy and very low power consumption. The PCF2127has a selectable I2C-bus or SPI-bus, a backup battery switch-over circuit, aprogrammable watchdog function, a timestamp function, and many other features.- config RTC_DS1307 bool "Enable DS1307 driver" depends on DM_RTC
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 308fab8da9..722f2be98f 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -27,6 +27,7 @@ obj-$(CONFIG_RTC_MV) += mvrtc.o obj-$(CONFIG_RTC_MXS) += mxsrtc.o obj-$(CONFIG_RTC_PCF8563) += pcf8563.o obj-$(CONFIG_RTC_PCF2127) += pcf2127.o +obj-$(CONFIG_RTC_PCF2131) += pcf2131.o obj-$(CONFIG_RTC_PL031) += pl031.o obj-$(CONFIG_RTC_PT7C4338) += pt7c4338.o obj-$(CONFIG_RTC_RV3028) += rv3028.o diff --git a/drivers/rtc/pcf2131.c b/drivers/rtc/pcf2131.c new file mode 100644 index 0000000000..8b9c17a2c8 --- /dev/null +++ b/drivers/rtc/pcf2131.c @@ -0,0 +1,189 @@ +// SPDX-License-Identifier: GPL-2.0+ +/*
- The NXP PCF2131 RTC uboot driver.
- Copyright 2023 NXP
- Date & Time support for PCF2131 RTC
- */
+/* #define DEBUG */
Drop this line.
+#include <common.h> +#include <command.h> +#include <dm.h> +#include <i2c.h> +#include <log.h> +#include <rtc.h>
+#define PCF2131_REG_CTRL1 0x00 +#define PCF2131_BIT_CTRL1_STOP BIT(5) +#define PCF2131_BIT_CTRL1_100TH_S_DIS BIT(4) +#define PCF2131_REG_CTRL2 0x01 +#define PCF2131_REG_CTRL3 0x02 +#define PCF2131_REG_SR_RESET 0x05 +#define PCF2131_SR_VAL_Clr_Pres 0xa4 +#define PCF2131_REG_SC 0x07 +#define PCF2131_REG_MN 0x08 +#define PCF2131_REG_HR 0x09 +#define PCF2131_REG_DM 0x0a +#define PCF2131_REG_DW 0x0b +#define PCF2131_REG_MO 0x0c +#define PCF2131_REG_YR 0x0d
+static int pcf2131_rtc_read(struct udevice *dev, uint offset, u8 *buffer, uint len) +{
struct dm_i2c_chip *chip = dev_get_parent_plat(dev);struct i2c_msg msg;int ret;/* Set the address of the start register to be read */ret = dm_i2c_write(dev, offset, NULL, 0);if (ret < 0)return ret;/* Read register's data */msg.addr = chip->chip_addr;msg.flags |= I2C_M_RD;msg.len = len;msg.buf = buffer;return dm_i2c_xfer(dev, &msg, 1);+}
+static int pcf2131_rtc_lock(struct udevice *dev) +{
int ret = 0;uchar buf[6] = { PCF2131_REG_CTRL1 };ret = pcf2131_rtc_read(dev, PCF2131_REG_CTRL1, buf, sizeof(buf));if (ret < 0)return ret;buf[PCF2131_REG_CTRL1] |= PCF2131_BIT_CTRL1_STOP;ret = dm_i2c_write(dev, PCF2131_REG_CTRL1, &buf[PCF2131_REG_CTRL1], 1);if (ret < 0)return ret;buf[PCF2131_REG_SR_RESET] = PCF2131_SR_VAL_Clr_Pres;ret = dm_i2c_write(dev, PCF2131_REG_SR_RESET, &buf[PCF2131_REG_SR_RESET], 1);return ret;
Just "return dm_i2c_write..." is ok.
+}
+static int pcf2131_rtc_unlock(struct udevice *dev) +{
int ret = 0;uchar buf[6] = { PCF2131_REG_CTRL1 };ret = pcf2131_rtc_read(dev, PCF2131_REG_CTRL1, buf, sizeof(buf));if (ret < 0)return ret;buf[PCF2131_REG_CTRL1] &= ~PCF2131_BIT_CTRL1_STOP;ret = dm_i2c_write(dev, PCF2131_REG_CTRL1, &buf[PCF2131_REG_CTRL1], 1);return ret;
Ditto.
+}
+static int pcf2131_rtc_write(struct udevice *dev, uint offset,
const u8 *buffer, uint len)+{
int ret = 0;ret = pcf2131_rtc_lock(dev);if (ret < 0)return ret;ret = dm_i2c_write(dev, offset, buffer, len);if (ret < 0)return ret;ret = pcf2131_rtc_unlock(dev);return ret;
Ditto.
+}
+static int pcf2131_rtc_set(struct udevice *dev, const struct rtc_time *tm) +{ > + uchar buf[7] = {0};
No need init is to 0?
int i = 0, ret;/* hours, minutes and seconds */buf[i++] = bin2bcd(tm->tm_sec);buf[i++] = bin2bcd(tm->tm_min);buf[i++] = bin2bcd(tm->tm_hour);buf[i++] = bin2bcd(tm->tm_mday);buf[i++] = tm->tm_wday & 0x07;/* month, 1 - 12 */buf[i++] = bin2bcd(tm->tm_mon);/* year */buf[i++] = bin2bcd(tm->tm_year % 100);ret = pcf2131_rtc_lock(dev);if (ret < 0)return ret;/* write register's data */ret = dm_i2c_write(dev, PCF2131_REG_SC, buf, i);if (ret < 0)return ret;ret = pcf2131_rtc_unlock(dev);return ret;
Just "return pfc2131_rtc_unlock..." is ok.
+}
+static int pcf2131_rtc_get(struct udevice *dev, struct rtc_time *tm) +{
int ret = 0;uchar buf[16] = { PCF2131_REG_CTRL1 };
No need initialize buf?
ret = pcf2131_rtc_read(dev, PCF2131_REG_CTRL1, buf, sizeof(buf));if (ret < 0)return ret;if (buf[PCF2131_REG_CTRL3] & 0x04)puts("### Warning: RTC Low Voltage - date/time not reliable\n");tm->tm_sec = bcd2bin(buf[PCF2131_REG_SC] & 0x7F);tm->tm_min = bcd2bin(buf[PCF2131_REG_MN] & 0x7F);tm->tm_hour = bcd2bin(buf[PCF2131_REG_HR] & 0x3F);tm->tm_mday = bcd2bin(buf[PCF2131_REG_DM] & 0x3F);tm->tm_mon = bcd2bin(buf[PCF2131_REG_MO] & 0x1F);tm->tm_year = bcd2bin(buf[PCF2131_REG_YR]) + 1900;if (tm->tm_year < 1970)tm->tm_year += 100; /* assume we are in 1970...2069 */tm->tm_wday = buf[PCF2131_REG_DW] & 0x07;tm->tm_yday = 0;tm->tm_isdst = 0;debug("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,tm->tm_hour, tm->tm_min, tm->tm_sec);return ret;+}
+static int pcf2131_rtc_reset(struct udevice *dev) +{
/*Doing nothing here*/return 0;+}
+static const struct rtc_ops pcf2131_rtc_ops = {
.get = pcf2131_rtc_get,.set = pcf2131_rtc_set,.reset = pcf2131_rtc_reset,.read = pcf2131_rtc_read,.write = pcf2131_rtc_write,+};
+static const struct udevice_id pcf2131_rtc_ids[] = {
{ .compatible = "nxp,pcf2131" },{ }+};
+U_BOOT_DRIVER(rtc_pcf2131) = {
.name = "rtc-pcf2131",.id = UCLASS_RTC,.of_match = pcf2131_rtc_ids,.ops = &pcf2131_rtc_ops,+};
2.37.1
Regards, Peng.