mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-10 15:14:43 +00:00
728d04cc72
At present the i2c emulators require access to the devicetree, which is not possible (by design) with of-platdata. Add a way for drivers to record the of-platdata index of their emulator, so that we can still find the emulator. This allows i2c emulation to work with of-platdata. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
114 lines
2.5 KiB
C
114 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2015 Google, Inc
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <i2c.h>
|
|
#include <rtc.h>
|
|
#include <asm/rtc.h>
|
|
#include <dm/acpi.h>
|
|
|
|
#define REG_COUNT 0x80
|
|
|
|
static int sandbox_rtc_get(struct udevice *dev, struct rtc_time *time)
|
|
{
|
|
u8 buf[7];
|
|
int ret;
|
|
|
|
ret = dm_i2c_read(dev, REG_SEC, buf, sizeof(buf));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
time->tm_sec = buf[REG_SEC - REG_SEC];
|
|
time->tm_min = buf[REG_MIN - REG_SEC];
|
|
time->tm_hour = buf[REG_HOUR - REG_SEC];
|
|
time->tm_mday = buf[REG_MDAY - REG_SEC];
|
|
time->tm_mon = buf[REG_MON - REG_SEC];
|
|
time->tm_year = buf[REG_YEAR - REG_SEC] + 1900;
|
|
time->tm_wday = buf[REG_WDAY - REG_SEC];
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sandbox_rtc_set(struct udevice *dev, const struct rtc_time *time)
|
|
{
|
|
u8 buf[7];
|
|
int ret;
|
|
|
|
buf[REG_SEC - REG_SEC] = time->tm_sec;
|
|
buf[REG_MIN - REG_SEC] = time->tm_min;
|
|
buf[REG_HOUR - REG_SEC] = time->tm_hour;
|
|
buf[REG_MDAY - REG_SEC] = time->tm_mday;
|
|
buf[REG_MON - REG_SEC] = time->tm_mon;
|
|
buf[REG_YEAR - REG_SEC] = time->tm_year - 1900;
|
|
buf[REG_WDAY - REG_SEC] = time->tm_wday;
|
|
|
|
ret = dm_i2c_write(dev, REG_SEC, buf, sizeof(buf));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sandbox_rtc_reset(struct udevice *dev)
|
|
{
|
|
return dm_i2c_reg_write(dev, REG_RESET, 0);
|
|
}
|
|
|
|
static int sandbox_rtc_read8(struct udevice *dev, unsigned int reg)
|
|
{
|
|
return dm_i2c_reg_read(dev, reg);
|
|
}
|
|
|
|
static int sandbox_rtc_write8(struct udevice *dev, unsigned int reg, int val)
|
|
{
|
|
return dm_i2c_reg_write(dev, reg, val);
|
|
}
|
|
|
|
#if CONFIG_IS_ENABLED(ACPIGEN)
|
|
static int sandbox_rtc_get_name(const struct udevice *dev, char *out_name)
|
|
{
|
|
return acpi_copy_name(out_name, "RTCC");
|
|
}
|
|
|
|
struct acpi_ops sandbox_rtc_acpi_ops = {
|
|
.get_name = sandbox_rtc_get_name,
|
|
};
|
|
#endif
|
|
|
|
static int sandbox_rtc_bind(struct udevice *dev)
|
|
{
|
|
#if CONFIG_IS_ENABLED(PLATDATA)
|
|
struct sandbox_i2c_rtc_plat_data *plat = dev_get_plat(dev);
|
|
|
|
/* Set up the emul_idx for i2c_emul_find() */
|
|
i2c_emul_set_idx(dev, plat->dtplat.sandbox_emul->idx);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct rtc_ops sandbox_rtc_ops = {
|
|
.get = sandbox_rtc_get,
|
|
.set = sandbox_rtc_set,
|
|
.reset = sandbox_rtc_reset,
|
|
.read8 = sandbox_rtc_read8,
|
|
.write8 = sandbox_rtc_write8,
|
|
};
|
|
|
|
static const struct udevice_id sandbox_rtc_ids[] = {
|
|
{ .compatible = "sandbox-rtc" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(sandbox_rtc) = {
|
|
.name = "sandbox_rtc",
|
|
.id = UCLASS_RTC,
|
|
.of_match = sandbox_rtc_ids,
|
|
.ops = &sandbox_rtc_ops,
|
|
.bind = sandbox_rtc_bind,
|
|
ACPI_OPS_PTR(&sandbox_rtc_acpi_ops)
|
|
};
|