Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * rtc-ds1390.c -- driver for the Dallas/Maxim DS1390/93/94 SPI RTC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2008 Mercury IMC Ltd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Written by Mark Jackson <mpfj@mimc.co.uk>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * NOTE: Currently this driver only supports the bare minimum for read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * and write the RTC. The extra features provided by the chip family
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * (alarms, trickle charger, different control registers) are unavailable.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/rtc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/spi/spi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/bcd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define DS1390_REG_100THS		0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define DS1390_REG_SECONDS		0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define DS1390_REG_MINUTES		0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define DS1390_REG_HOURS		0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define DS1390_REG_DAY			0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define DS1390_REG_DATE			0x05
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define DS1390_REG_MONTH_CENT		0x06
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define DS1390_REG_YEAR			0x07
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define DS1390_REG_ALARM_100THS		0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define DS1390_REG_ALARM_SECONDS	0x09
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define DS1390_REG_ALARM_MINUTES	0x0A
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #define DS1390_REG_ALARM_HOURS		0x0B
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define DS1390_REG_ALARM_DAY_DATE	0x0C
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #define DS1390_REG_CONTROL		0x0D
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define DS1390_REG_STATUS		0x0E
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #define DS1390_REG_TRICKLE		0x0F
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #define DS1390_TRICKLE_CHARGER_ENABLE	0xA0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #define DS1390_TRICKLE_CHARGER_250_OHM	0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) #define DS1390_TRICKLE_CHARGER_2K_OHM	0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) #define DS1390_TRICKLE_CHARGER_4K_OHM	0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) #define DS1390_TRICKLE_CHARGER_NO_DIODE	0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) #define DS1390_TRICKLE_CHARGER_DIODE	0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) struct ds1390 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	struct rtc_device *rtc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	u8 txrx_buf[9];	/* cmd + 8 registers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) static void ds1390_set_reg(struct device *dev, unsigned char address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 			   unsigned char data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	struct spi_device *spi = to_spi_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	unsigned char buf[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	/* MSB must be '1' to write */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	buf[0] = address | 0x80;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	buf[1] = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	spi_write(spi, buf, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) static int ds1390_get_reg(struct device *dev, unsigned char address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 				unsigned char *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	struct spi_device *spi = to_spi_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	struct ds1390 *chip = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	/* Clear MSB to indicate read */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	chip->txrx_buf[0] = address & 0x7f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	/* do the i/o */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	status = spi_write_then_read(spi, chip->txrx_buf, 1, chip->txrx_buf, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	if (status != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	*data = chip->txrx_buf[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) static void ds1390_trickle_of_init(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	u32 ohms = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	u8 value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	if (of_property_read_u32(spi->dev.of_node, "trickle-resistor-ohms",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 				 &ohms))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	/* Enable charger */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	value = DS1390_TRICKLE_CHARGER_ENABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	if (of_property_read_bool(spi->dev.of_node, "trickle-diode-disable"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		value |= DS1390_TRICKLE_CHARGER_NO_DIODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		value |= DS1390_TRICKLE_CHARGER_DIODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	/* Resistor select */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	switch (ohms) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	case 250:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		value |= DS1390_TRICKLE_CHARGER_250_OHM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	case 2000:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		value |= DS1390_TRICKLE_CHARGER_2K_OHM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	case 4000:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		value |= DS1390_TRICKLE_CHARGER_4K_OHM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		dev_warn(&spi->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 			 "Unsupported ohm value %02ux in dt\n", ohms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	ds1390_set_reg(&spi->dev, DS1390_REG_TRICKLE, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static int ds1390_read_time(struct device *dev, struct rtc_time *dt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	struct spi_device *spi = to_spi_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	struct ds1390 *chip = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	/* build the message */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	chip->txrx_buf[0] = DS1390_REG_SECONDS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	/* do the i/o */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	status = spi_write_then_read(spi, chip->txrx_buf, 1, chip->txrx_buf, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	if (status != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	/* The chip sends data in this order:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	 * Seconds, Minutes, Hours, Day, Date, Month / Century, Year */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	dt->tm_sec	= bcd2bin(chip->txrx_buf[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	dt->tm_min	= bcd2bin(chip->txrx_buf[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	dt->tm_hour	= bcd2bin(chip->txrx_buf[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	dt->tm_wday	= bcd2bin(chip->txrx_buf[3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	dt->tm_mday	= bcd2bin(chip->txrx_buf[4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	/* mask off century bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	dt->tm_mon	= bcd2bin(chip->txrx_buf[5] & 0x7f) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	/* adjust for century bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	dt->tm_year = bcd2bin(chip->txrx_buf[6]) + ((chip->txrx_buf[5] & 0x80) ? 100 : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static int ds1390_set_time(struct device *dev, struct rtc_time *dt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	struct spi_device *spi = to_spi_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	struct ds1390 *chip = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	/* build the message */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	chip->txrx_buf[0] = DS1390_REG_SECONDS | 0x80;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	chip->txrx_buf[1] = bin2bcd(dt->tm_sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	chip->txrx_buf[2] = bin2bcd(dt->tm_min);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	chip->txrx_buf[3] = bin2bcd(dt->tm_hour);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	chip->txrx_buf[4] = bin2bcd(dt->tm_wday);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	chip->txrx_buf[5] = bin2bcd(dt->tm_mday);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	chip->txrx_buf[6] = bin2bcd(dt->tm_mon + 1) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 				((dt->tm_year > 99) ? 0x80 : 0x00);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	chip->txrx_buf[7] = bin2bcd(dt->tm_year % 100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	/* do the i/o */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	return spi_write_then_read(spi, chip->txrx_buf, 8, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static const struct rtc_class_ops ds1390_rtc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	.read_time	= ds1390_read_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	.set_time	= ds1390_set_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) static int ds1390_probe(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	unsigned char tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	struct ds1390 *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	spi->mode = SPI_MODE_3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	spi->bits_per_word = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	spi_setup(spi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	chip = devm_kzalloc(&spi->dev, sizeof(*chip), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	if (!chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	spi_set_drvdata(spi, chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	res = ds1390_get_reg(&spi->dev, DS1390_REG_SECONDS, &tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	if (res != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		dev_err(&spi->dev, "unable to read device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	if (spi->dev.of_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		ds1390_trickle_of_init(spi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	chip->rtc = devm_rtc_device_register(&spi->dev, "ds1390",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 					&ds1390_rtc_ops, THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	if (IS_ERR(chip->rtc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		dev_err(&spi->dev, "unable to register device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		res = PTR_ERR(chip->rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static const struct of_device_id ds1390_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	{ .compatible = "dallas,ds1390" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	{}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) MODULE_DEVICE_TABLE(of, ds1390_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) static struct spi_driver ds1390_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		.name	= "rtc-ds1390",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		.of_match_table = of_match_ptr(ds1390_of_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	.probe	= ds1390_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) module_spi_driver(ds1390_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) MODULE_DESCRIPTION("Dallas/Maxim DS1390/93/94 SPI RTC driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) MODULE_AUTHOR("Mark Jackson <mpfj@mimc.co.uk>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) MODULE_ALIAS("spi:rtc-ds1390");