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![Uwe Kleine-König](/assets/img/avatar_default.png)
Since commit d68778b80d
("rtc: initialize output parameter for read
alarm to "uninitialized"") there is no need to explicitly set
unsupported members to -1. So drop the respective assignments from
drivers.
Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
689 lines
17 KiB
C
689 lines
17 KiB
C
/*
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* An I2C driver for Ricoh RS5C372, R2025S/D and RV5C38[67] RTCs
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*
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* Copyright (C) 2005 Pavel Mironchik <pmironchik@optifacio.net>
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* Copyright (C) 2006 Tower Technologies
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* Copyright (C) 2008 Paul Mundt
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/i2c.h>
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#include <linux/rtc.h>
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#include <linux/bcd.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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/*
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* Ricoh has a family of I2C based RTCs, which differ only slightly from
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* each other. Differences center on pinout (e.g. how many interrupts,
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* output clock, etc) and how the control registers are used. The '372
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* is significant only because that's the one this driver first supported.
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*/
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#define RS5C372_REG_SECS 0
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#define RS5C372_REG_MINS 1
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#define RS5C372_REG_HOURS 2
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#define RS5C372_REG_WDAY 3
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#define RS5C372_REG_DAY 4
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#define RS5C372_REG_MONTH 5
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#define RS5C372_REG_YEAR 6
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#define RS5C372_REG_TRIM 7
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# define RS5C372_TRIM_XSL 0x80
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# define RS5C372_TRIM_MASK 0x7F
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#define RS5C_REG_ALARM_A_MIN 8 /* or ALARM_W */
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#define RS5C_REG_ALARM_A_HOURS 9
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#define RS5C_REG_ALARM_A_WDAY 10
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#define RS5C_REG_ALARM_B_MIN 11 /* or ALARM_D */
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#define RS5C_REG_ALARM_B_HOURS 12
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#define RS5C_REG_ALARM_B_WDAY 13 /* (ALARM_B only) */
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#define RS5C_REG_CTRL1 14
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# define RS5C_CTRL1_AALE (1 << 7) /* or WALE */
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# define RS5C_CTRL1_BALE (1 << 6) /* or DALE */
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# define RV5C387_CTRL1_24 (1 << 5)
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# define RS5C372A_CTRL1_SL1 (1 << 5)
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# define RS5C_CTRL1_CT_MASK (7 << 0)
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# define RS5C_CTRL1_CT0 (0 << 0) /* no periodic irq */
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# define RS5C_CTRL1_CT4 (4 << 0) /* 1 Hz level irq */
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#define RS5C_REG_CTRL2 15
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# define RS5C372_CTRL2_24 (1 << 5)
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# define R2025_CTRL2_XST (1 << 5)
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# define RS5C_CTRL2_XSTP (1 << 4) /* only if !R2025S/D */
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# define RS5C_CTRL2_CTFG (1 << 2)
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# define RS5C_CTRL2_AAFG (1 << 1) /* or WAFG */
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# define RS5C_CTRL2_BAFG (1 << 0) /* or DAFG */
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/* to read (style 1) or write registers starting at R */
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#define RS5C_ADDR(R) (((R) << 4) | 0)
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enum rtc_type {
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rtc_undef = 0,
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rtc_r2025sd,
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rtc_r2221tl,
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rtc_rs5c372a,
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rtc_rs5c372b,
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rtc_rv5c386,
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rtc_rv5c387a,
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};
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static const struct i2c_device_id rs5c372_id[] = {
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{ "r2025sd", rtc_r2025sd },
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{ "r2221tl", rtc_r2221tl },
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{ "rs5c372a", rtc_rs5c372a },
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{ "rs5c372b", rtc_rs5c372b },
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{ "rv5c386", rtc_rv5c386 },
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{ "rv5c387a", rtc_rv5c387a },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, rs5c372_id);
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/* REVISIT: this assumes that:
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* - we're in the 21st century, so it's safe to ignore the century
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* bit for rv5c38[67] (REG_MONTH bit 7);
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* - we should use ALARM_A not ALARM_B (may be wrong on some boards)
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*/
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struct rs5c372 {
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struct i2c_client *client;
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struct rtc_device *rtc;
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enum rtc_type type;
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unsigned time24:1;
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unsigned has_irq:1;
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unsigned smbus:1;
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char buf[17];
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char *regs;
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};
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static int rs5c_get_regs(struct rs5c372 *rs5c)
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{
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struct i2c_client *client = rs5c->client;
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struct i2c_msg msgs[] = {
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{
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.addr = client->addr,
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.flags = I2C_M_RD,
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.len = sizeof(rs5c->buf),
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.buf = rs5c->buf
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},
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};
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/* This implements the third reading method from the datasheet, using
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* an internal address that's reset after each transaction (by STOP)
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* to 0x0f ... so we read extra registers, and skip the first one.
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*
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* The first method doesn't work with the iop3xx adapter driver, on at
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* least 80219 chips; this works around that bug.
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*
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* The third method on the other hand doesn't work for the SMBus-only
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* configurations, so we use the the first method there, stripping off
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* the extra register in the process.
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*/
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if (rs5c->smbus) {
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int addr = RS5C_ADDR(RS5C372_REG_SECS);
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int size = sizeof(rs5c->buf) - 1;
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if (i2c_smbus_read_i2c_block_data(client, addr, size,
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rs5c->buf + 1) != size) {
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dev_warn(&client->dev, "can't read registers\n");
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return -EIO;
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}
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} else {
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if ((i2c_transfer(client->adapter, msgs, 1)) != 1) {
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dev_warn(&client->dev, "can't read registers\n");
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return -EIO;
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}
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}
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dev_dbg(&client->dev,
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"%3ph (%02x) %3ph (%02x), %3ph, %3ph; %02x %02x\n",
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rs5c->regs + 0, rs5c->regs[3],
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rs5c->regs + 4, rs5c->regs[7],
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rs5c->regs + 8, rs5c->regs + 11,
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rs5c->regs[14], rs5c->regs[15]);
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return 0;
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}
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static unsigned rs5c_reg2hr(struct rs5c372 *rs5c, unsigned reg)
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{
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unsigned hour;
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if (rs5c->time24)
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return bcd2bin(reg & 0x3f);
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hour = bcd2bin(reg & 0x1f);
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if (hour == 12)
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hour = 0;
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if (reg & 0x20)
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hour += 12;
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return hour;
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}
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static unsigned rs5c_hr2reg(struct rs5c372 *rs5c, unsigned hour)
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{
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if (rs5c->time24)
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return bin2bcd(hour);
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if (hour > 12)
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return 0x20 | bin2bcd(hour - 12);
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if (hour == 12)
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return 0x20 | bin2bcd(12);
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if (hour == 0)
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return bin2bcd(12);
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return bin2bcd(hour);
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}
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static int rs5c372_get_datetime(struct i2c_client *client, struct rtc_time *tm)
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{
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struct rs5c372 *rs5c = i2c_get_clientdata(client);
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int status = rs5c_get_regs(rs5c);
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if (status < 0)
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return status;
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tm->tm_sec = bcd2bin(rs5c->regs[RS5C372_REG_SECS] & 0x7f);
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tm->tm_min = bcd2bin(rs5c->regs[RS5C372_REG_MINS] & 0x7f);
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tm->tm_hour = rs5c_reg2hr(rs5c, rs5c->regs[RS5C372_REG_HOURS]);
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tm->tm_wday = bcd2bin(rs5c->regs[RS5C372_REG_WDAY] & 0x07);
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tm->tm_mday = bcd2bin(rs5c->regs[RS5C372_REG_DAY] & 0x3f);
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/* tm->tm_mon is zero-based */
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tm->tm_mon = bcd2bin(rs5c->regs[RS5C372_REG_MONTH] & 0x1f) - 1;
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/* year is 1900 + tm->tm_year */
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tm->tm_year = bcd2bin(rs5c->regs[RS5C372_REG_YEAR]) + 100;
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dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
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"mday=%d, mon=%d, year=%d, wday=%d\n",
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__func__,
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tm->tm_sec, tm->tm_min, tm->tm_hour,
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tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
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/* rtc might need initialization */
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return rtc_valid_tm(tm);
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}
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static int rs5c372_set_datetime(struct i2c_client *client, struct rtc_time *tm)
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{
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struct rs5c372 *rs5c = i2c_get_clientdata(client);
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unsigned char buf[7];
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int addr;
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dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d "
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"mday=%d, mon=%d, year=%d, wday=%d\n",
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__func__,
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tm->tm_sec, tm->tm_min, tm->tm_hour,
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tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
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addr = RS5C_ADDR(RS5C372_REG_SECS);
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buf[0] = bin2bcd(tm->tm_sec);
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buf[1] = bin2bcd(tm->tm_min);
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buf[2] = rs5c_hr2reg(rs5c, tm->tm_hour);
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buf[3] = bin2bcd(tm->tm_wday);
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buf[4] = bin2bcd(tm->tm_mday);
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buf[5] = bin2bcd(tm->tm_mon + 1);
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buf[6] = bin2bcd(tm->tm_year - 100);
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if (i2c_smbus_write_i2c_block_data(client, addr, sizeof(buf), buf) < 0) {
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dev_err(&client->dev, "%s: write error\n", __func__);
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return -EIO;
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}
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return 0;
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}
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#if IS_ENABLED(CONFIG_RTC_INTF_PROC)
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#define NEED_TRIM
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#endif
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#if IS_ENABLED(CONFIG_RTC_INTF_SYSFS)
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#define NEED_TRIM
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#endif
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#ifdef NEED_TRIM
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static int rs5c372_get_trim(struct i2c_client *client, int *osc, int *trim)
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{
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struct rs5c372 *rs5c372 = i2c_get_clientdata(client);
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u8 tmp = rs5c372->regs[RS5C372_REG_TRIM];
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if (osc)
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*osc = (tmp & RS5C372_TRIM_XSL) ? 32000 : 32768;
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if (trim) {
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dev_dbg(&client->dev, "%s: raw trim=%x\n", __func__, tmp);
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tmp &= RS5C372_TRIM_MASK;
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if (tmp & 0x3e) {
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int t = tmp & 0x3f;
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if (tmp & 0x40)
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t = (~t | (s8)0xc0) + 1;
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else
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t = t - 1;
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tmp = t * 2;
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} else
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tmp = 0;
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*trim = tmp;
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}
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return 0;
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}
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#endif
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static int rs5c372_rtc_read_time(struct device *dev, struct rtc_time *tm)
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{
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return rs5c372_get_datetime(to_i2c_client(dev), tm);
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}
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static int rs5c372_rtc_set_time(struct device *dev, struct rtc_time *tm)
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{
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return rs5c372_set_datetime(to_i2c_client(dev), tm);
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}
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static int rs5c_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct rs5c372 *rs5c = i2c_get_clientdata(client);
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unsigned char buf;
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int status, addr;
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buf = rs5c->regs[RS5C_REG_CTRL1];
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if (!rs5c->has_irq)
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return -EINVAL;
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status = rs5c_get_regs(rs5c);
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if (status < 0)
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return status;
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addr = RS5C_ADDR(RS5C_REG_CTRL1);
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if (enabled)
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buf |= RS5C_CTRL1_AALE;
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else
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buf &= ~RS5C_CTRL1_AALE;
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if (i2c_smbus_write_byte_data(client, addr, buf) < 0) {
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dev_warn(dev, "can't update alarm\n");
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status = -EIO;
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} else
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rs5c->regs[RS5C_REG_CTRL1] = buf;
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return status;
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}
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/* NOTE: Since RTC_WKALM_{RD,SET} were originally defined for EFI,
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* which only exposes a polled programming interface; and since
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* these calls map directly to those EFI requests; we don't demand
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* we have an IRQ for this chip when we go through this API.
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*
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* The older x86_pc derived RTC_ALM_{READ,SET} calls require irqs
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* though, managed through RTC_AIE_{ON,OFF} requests.
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*/
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static int rs5c_read_alarm(struct device *dev, struct rtc_wkalrm *t)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct rs5c372 *rs5c = i2c_get_clientdata(client);
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int status;
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status = rs5c_get_regs(rs5c);
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if (status < 0)
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return status;
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/* report alarm time */
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t->time.tm_sec = 0;
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t->time.tm_min = bcd2bin(rs5c->regs[RS5C_REG_ALARM_A_MIN] & 0x7f);
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t->time.tm_hour = rs5c_reg2hr(rs5c, rs5c->regs[RS5C_REG_ALARM_A_HOURS]);
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/* ... and status */
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t->enabled = !!(rs5c->regs[RS5C_REG_CTRL1] & RS5C_CTRL1_AALE);
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t->pending = !!(rs5c->regs[RS5C_REG_CTRL2] & RS5C_CTRL2_AAFG);
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return 0;
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}
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static int rs5c_set_alarm(struct device *dev, struct rtc_wkalrm *t)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct rs5c372 *rs5c = i2c_get_clientdata(client);
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int status, addr, i;
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unsigned char buf[3];
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/* only handle up to 24 hours in the future, like RTC_ALM_SET */
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if (t->time.tm_mday != -1
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|| t->time.tm_mon != -1
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|| t->time.tm_year != -1)
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return -EINVAL;
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/* REVISIT: round up tm_sec */
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/* if needed, disable irq (clears pending status) */
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status = rs5c_get_regs(rs5c);
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if (status < 0)
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return status;
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if (rs5c->regs[RS5C_REG_CTRL1] & RS5C_CTRL1_AALE) {
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addr = RS5C_ADDR(RS5C_REG_CTRL1);
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buf[0] = rs5c->regs[RS5C_REG_CTRL1] & ~RS5C_CTRL1_AALE;
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if (i2c_smbus_write_byte_data(client, addr, buf[0]) < 0) {
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dev_dbg(dev, "can't disable alarm\n");
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return -EIO;
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}
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rs5c->regs[RS5C_REG_CTRL1] = buf[0];
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}
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/* set alarm */
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buf[0] = bin2bcd(t->time.tm_min);
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buf[1] = rs5c_hr2reg(rs5c, t->time.tm_hour);
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buf[2] = 0x7f; /* any/all days */
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for (i = 0; i < sizeof(buf); i++) {
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addr = RS5C_ADDR(RS5C_REG_ALARM_A_MIN + i);
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if (i2c_smbus_write_byte_data(client, addr, buf[i]) < 0) {
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dev_dbg(dev, "can't set alarm time\n");
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return -EIO;
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}
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}
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/* ... and maybe enable its irq */
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if (t->enabled) {
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addr = RS5C_ADDR(RS5C_REG_CTRL1);
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buf[0] = rs5c->regs[RS5C_REG_CTRL1] | RS5C_CTRL1_AALE;
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if (i2c_smbus_write_byte_data(client, addr, buf[0]) < 0)
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dev_warn(dev, "can't enable alarm\n");
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rs5c->regs[RS5C_REG_CTRL1] = buf[0];
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}
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return 0;
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}
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#if IS_ENABLED(CONFIG_RTC_INTF_PROC)
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static int rs5c372_rtc_proc(struct device *dev, struct seq_file *seq)
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{
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int err, osc, trim;
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err = rs5c372_get_trim(to_i2c_client(dev), &osc, &trim);
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if (err == 0) {
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seq_printf(seq, "crystal\t\t: %d.%03d KHz\n",
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osc / 1000, osc % 1000);
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seq_printf(seq, "trim\t\t: %d\n", trim);
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}
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return 0;
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}
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#else
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#define rs5c372_rtc_proc NULL
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#endif
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static const struct rtc_class_ops rs5c372_rtc_ops = {
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.proc = rs5c372_rtc_proc,
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.read_time = rs5c372_rtc_read_time,
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.set_time = rs5c372_rtc_set_time,
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.read_alarm = rs5c_read_alarm,
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.set_alarm = rs5c_set_alarm,
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.alarm_irq_enable = rs5c_rtc_alarm_irq_enable,
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};
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#if IS_ENABLED(CONFIG_RTC_INTF_SYSFS)
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static ssize_t rs5c372_sysfs_show_trim(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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int err, trim;
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err = rs5c372_get_trim(to_i2c_client(dev), NULL, &trim);
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if (err)
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return err;
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return sprintf(buf, "%d\n", trim);
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}
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static DEVICE_ATTR(trim, S_IRUGO, rs5c372_sysfs_show_trim, NULL);
|
|
|
|
static ssize_t rs5c372_sysfs_show_osc(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
int err, osc;
|
|
|
|
err = rs5c372_get_trim(to_i2c_client(dev), &osc, NULL);
|
|
if (err)
|
|
return err;
|
|
|
|
return sprintf(buf, "%d.%03d KHz\n", osc / 1000, osc % 1000);
|
|
}
|
|
static DEVICE_ATTR(osc, S_IRUGO, rs5c372_sysfs_show_osc, NULL);
|
|
|
|
static int rs5c_sysfs_register(struct device *dev)
|
|
{
|
|
int err;
|
|
|
|
err = device_create_file(dev, &dev_attr_trim);
|
|
if (err)
|
|
return err;
|
|
err = device_create_file(dev, &dev_attr_osc);
|
|
if (err)
|
|
device_remove_file(dev, &dev_attr_trim);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void rs5c_sysfs_unregister(struct device *dev)
|
|
{
|
|
device_remove_file(dev, &dev_attr_trim);
|
|
device_remove_file(dev, &dev_attr_osc);
|
|
}
|
|
|
|
#else
|
|
static int rs5c_sysfs_register(struct device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void rs5c_sysfs_unregister(struct device *dev)
|
|
{
|
|
/* nothing */
|
|
}
|
|
#endif /* SYSFS */
|
|
|
|
static struct i2c_driver rs5c372_driver;
|
|
|
|
static int rs5c_oscillator_setup(struct rs5c372 *rs5c372)
|
|
{
|
|
unsigned char buf[2];
|
|
int addr, i, ret = 0;
|
|
|
|
if (rs5c372->type == rtc_r2025sd) {
|
|
if (rs5c372->regs[RS5C_REG_CTRL2] & R2025_CTRL2_XST)
|
|
return ret;
|
|
rs5c372->regs[RS5C_REG_CTRL2] |= R2025_CTRL2_XST;
|
|
} else {
|
|
if (!(rs5c372->regs[RS5C_REG_CTRL2] & RS5C_CTRL2_XSTP))
|
|
return ret;
|
|
rs5c372->regs[RS5C_REG_CTRL2] &= ~RS5C_CTRL2_XSTP;
|
|
}
|
|
|
|
addr = RS5C_ADDR(RS5C_REG_CTRL1);
|
|
buf[0] = rs5c372->regs[RS5C_REG_CTRL1];
|
|
buf[1] = rs5c372->regs[RS5C_REG_CTRL2];
|
|
|
|
/* use 24hr mode */
|
|
switch (rs5c372->type) {
|
|
case rtc_rs5c372a:
|
|
case rtc_rs5c372b:
|
|
buf[1] |= RS5C372_CTRL2_24;
|
|
rs5c372->time24 = 1;
|
|
break;
|
|
case rtc_r2025sd:
|
|
case rtc_r2221tl:
|
|
case rtc_rv5c386:
|
|
case rtc_rv5c387a:
|
|
buf[0] |= RV5C387_CTRL1_24;
|
|
rs5c372->time24 = 1;
|
|
break;
|
|
default:
|
|
/* impossible */
|
|
break;
|
|
}
|
|
|
|
for (i = 0; i < sizeof(buf); i++) {
|
|
addr = RS5C_ADDR(RS5C_REG_CTRL1 + i);
|
|
ret = i2c_smbus_write_byte_data(rs5c372->client, addr, buf[i]);
|
|
if (unlikely(ret < 0))
|
|
return ret;
|
|
}
|
|
|
|
rs5c372->regs[RS5C_REG_CTRL1] = buf[0];
|
|
rs5c372->regs[RS5C_REG_CTRL2] = buf[1];
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rs5c372_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
int err = 0;
|
|
int smbus_mode = 0;
|
|
struct rs5c372 *rs5c372;
|
|
struct rtc_time tm;
|
|
|
|
dev_dbg(&client->dev, "%s\n", __func__);
|
|
|
|
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C |
|
|
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_I2C_BLOCK)) {
|
|
/*
|
|
* If we don't have any master mode adapter, try breaking
|
|
* it down in to the barest of capabilities.
|
|
*/
|
|
if (i2c_check_functionality(client->adapter,
|
|
I2C_FUNC_SMBUS_BYTE_DATA |
|
|
I2C_FUNC_SMBUS_I2C_BLOCK))
|
|
smbus_mode = 1;
|
|
else {
|
|
/* Still no good, give up */
|
|
err = -ENODEV;
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
rs5c372 = devm_kzalloc(&client->dev, sizeof(struct rs5c372),
|
|
GFP_KERNEL);
|
|
if (!rs5c372) {
|
|
err = -ENOMEM;
|
|
goto exit;
|
|
}
|
|
|
|
rs5c372->client = client;
|
|
i2c_set_clientdata(client, rs5c372);
|
|
rs5c372->type = id->driver_data;
|
|
|
|
/* we read registers 0x0f then 0x00-0x0f; skip the first one */
|
|
rs5c372->regs = &rs5c372->buf[1];
|
|
rs5c372->smbus = smbus_mode;
|
|
|
|
err = rs5c_get_regs(rs5c372);
|
|
if (err < 0)
|
|
goto exit;
|
|
|
|
/* clock may be set for am/pm or 24 hr time */
|
|
switch (rs5c372->type) {
|
|
case rtc_rs5c372a:
|
|
case rtc_rs5c372b:
|
|
/* alarm uses ALARM_A; and nINTRA on 372a, nINTR on 372b.
|
|
* so does periodic irq, except some 327a modes.
|
|
*/
|
|
if (rs5c372->regs[RS5C_REG_CTRL2] & RS5C372_CTRL2_24)
|
|
rs5c372->time24 = 1;
|
|
break;
|
|
case rtc_r2025sd:
|
|
case rtc_r2221tl:
|
|
case rtc_rv5c386:
|
|
case rtc_rv5c387a:
|
|
if (rs5c372->regs[RS5C_REG_CTRL1] & RV5C387_CTRL1_24)
|
|
rs5c372->time24 = 1;
|
|
/* alarm uses ALARM_W; and nINTRB for alarm and periodic
|
|
* irq, on both 386 and 387
|
|
*/
|
|
break;
|
|
default:
|
|
dev_err(&client->dev, "unknown RTC type\n");
|
|
goto exit;
|
|
}
|
|
|
|
/* if the oscillator lost power and no other software (like
|
|
* the bootloader) set it up, do it here.
|
|
*
|
|
* The R2025S/D does this a little differently than the other
|
|
* parts, so we special case that..
|
|
*/
|
|
err = rs5c_oscillator_setup(rs5c372);
|
|
if (unlikely(err < 0)) {
|
|
dev_err(&client->dev, "setup error\n");
|
|
goto exit;
|
|
}
|
|
|
|
if (rs5c372_get_datetime(client, &tm) < 0)
|
|
dev_warn(&client->dev, "clock needs to be set\n");
|
|
|
|
dev_info(&client->dev, "%s found, %s\n",
|
|
({ char *s; switch (rs5c372->type) {
|
|
case rtc_r2025sd: s = "r2025sd"; break;
|
|
case rtc_r2221tl: s = "r2221tl"; break;
|
|
case rtc_rs5c372a: s = "rs5c372a"; break;
|
|
case rtc_rs5c372b: s = "rs5c372b"; break;
|
|
case rtc_rv5c386: s = "rv5c386"; break;
|
|
case rtc_rv5c387a: s = "rv5c387a"; break;
|
|
default: s = "chip"; break;
|
|
}; s;}),
|
|
rs5c372->time24 ? "24hr" : "am/pm"
|
|
);
|
|
|
|
/* REVISIT use client->irq to register alarm irq ... */
|
|
rs5c372->rtc = devm_rtc_device_register(&client->dev,
|
|
rs5c372_driver.driver.name,
|
|
&rs5c372_rtc_ops, THIS_MODULE);
|
|
|
|
if (IS_ERR(rs5c372->rtc)) {
|
|
err = PTR_ERR(rs5c372->rtc);
|
|
goto exit;
|
|
}
|
|
|
|
err = rs5c_sysfs_register(&client->dev);
|
|
if (err)
|
|
goto exit;
|
|
|
|
return 0;
|
|
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static int rs5c372_remove(struct i2c_client *client)
|
|
{
|
|
rs5c_sysfs_unregister(&client->dev);
|
|
return 0;
|
|
}
|
|
|
|
static struct i2c_driver rs5c372_driver = {
|
|
.driver = {
|
|
.name = "rtc-rs5c372",
|
|
},
|
|
.probe = rs5c372_probe,
|
|
.remove = rs5c372_remove,
|
|
.id_table = rs5c372_id,
|
|
};
|
|
|
|
module_i2c_driver(rs5c372_driver);
|
|
|
|
MODULE_AUTHOR(
|
|
"Pavel Mironchik <pmironchik@optifacio.net>, "
|
|
"Alessandro Zummo <a.zummo@towertech.it>, "
|
|
"Paul Mundt <lethal@linux-sh.org>");
|
|
MODULE_DESCRIPTION("Ricoh RS5C372 RTC driver");
|
|
MODULE_LICENSE("GPL");
|