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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#define LOG_CATEGORY UCLASS_RTC
#include <dm.h>
#include <errno.h>
#include <log.h>
#include <rtc.h>
int dm_rtc_get(struct udevice *dev, struct rtc_time *time)
{
struct rtc_ops *ops = rtc_get_ops(dev);
assert(ops);
if (!ops->get)
return -ENOSYS;
return ops->get(dev, time);
}
int dm_rtc_set(struct udevice *dev, struct rtc_time *time)
{
struct rtc_ops *ops = rtc_get_ops(dev);
assert(ops);
if (!ops->set)
return -ENOSYS;
return ops->set(dev, time);
}
int dm_rtc_reset(struct udevice *dev)
{
struct rtc_ops *ops = rtc_get_ops(dev);
assert(ops);
if (!ops->reset)
return -ENOSYS;
return ops->reset(dev);
}
int dm_rtc_read(struct udevice *dev, unsigned int reg, u8 *buf, unsigned int len)
{
struct rtc_ops *ops = rtc_get_ops(dev);
assert(ops);
if (ops->read)
return ops->read(dev, reg, buf, len);
if (!ops->read8)
return -ENOSYS;
while (len--) {
int ret = ops->read8(dev, reg++);
if (ret < 0)
return ret;
*buf++ = ret;
}
return 0;
}
int dm_rtc_write(struct udevice *dev, unsigned int reg,
const u8 *buf, unsigned int len)
{
struct rtc_ops *ops = rtc_get_ops(dev);
assert(ops);
if (ops->write)
return ops->write(dev, reg, buf, len);
if (!ops->write8)
return -ENOSYS;
while (len--) {
int ret = ops->write8(dev, reg++, *buf++);
if (ret < 0)
return ret;
}
return 0;
}
int rtc_read8(struct udevice *dev, unsigned int reg)
{
struct rtc_ops *ops = rtc_get_ops(dev);
assert(ops);
if (ops->read8)
return ops->read8(dev, reg);
if (ops->read) {
u8 buf[1];
int ret = ops->read(dev, reg, buf, 1);
if (ret < 0)
return ret;
return buf[0];
}
return -ENOSYS;
}
int rtc_write8(struct udevice *dev, unsigned int reg, int val)
{
struct rtc_ops *ops = rtc_get_ops(dev);
assert(ops);
if (ops->write8)
return ops->write8(dev, reg, val);
if (ops->write) {
u8 buf[1] = { val };
return ops->write(dev, reg, buf, 1);
}
return -ENOSYS;
}
int rtc_read16(struct udevice *dev, unsigned int reg, u16 *valuep)
{
u16 value = 0;
int ret;
int i;
for (i = 0; i < sizeof(value); i++) {
ret = rtc_read8(dev, reg + i);
if (ret < 0)
return ret;
value |= ret << (i << 3);
}
*valuep = value;
return 0;
}
int rtc_write16(struct udevice *dev, unsigned int reg, u16 value)
{
int i, ret;
for (i = 0; i < sizeof(value); i++) {
ret = rtc_write8(dev, reg + i, (value >> (i << 3)) & 0xff);
if (ret)
return ret;
}
return 0;
}
int rtc_read32(struct udevice *dev, unsigned int reg, u32 *valuep)
{
u32 value = 0;
int ret;
int i;
for (i = 0; i < sizeof(value); i++) {
ret = rtc_read8(dev, reg + i);
if (ret < 0)
return ret;
value |= ret << (i << 3);
}
*valuep = value;
return 0;
}
int rtc_write32(struct udevice *dev, unsigned int reg, u32 value)
{
int i, ret;
for (i = 0; i < sizeof(value); i++) {
ret = rtc_write8(dev, reg + i, (value >> (i << 3)) & 0xff);
if (ret)
return ret;
}
return 0;
}
UCLASS_DRIVER(rtc) = {
.name = "rtc",
.id = UCLASS_RTC,
.flags = DM_UC_FLAG_SEQ_ALIAS,
#if CONFIG_IS_ENABLED(OF_REAL)
.post_bind = dm_scan_fdt_dev,
#endif
};
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