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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>
115 lines
2.5 KiB
C
115 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#include <common.h>
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#include <dm.h>
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#include <i2c.h>
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#include <rtc.h>
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#include <asm/rtc.h>
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#include <dm/acpi.h>
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#define REG_COUNT 0x80
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static int sandbox_rtc_get(struct udevice *dev, struct rtc_time *time)
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{
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u8 buf[7];
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int ret;
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ret = dm_i2c_read(dev, REG_SEC, buf, sizeof(buf));
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if (ret < 0)
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return ret;
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time->tm_sec = buf[REG_SEC - REG_SEC];
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time->tm_min = buf[REG_MIN - REG_SEC];
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time->tm_hour = buf[REG_HOUR - REG_SEC];
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time->tm_mday = buf[REG_MDAY - REG_SEC];
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time->tm_mon = buf[REG_MON - REG_SEC];
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time->tm_year = buf[REG_YEAR - REG_SEC] + 1900;
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time->tm_wday = buf[REG_WDAY - REG_SEC];
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return 0;
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}
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static int sandbox_rtc_set(struct udevice *dev, const struct rtc_time *time)
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{
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u8 buf[7];
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int ret;
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buf[REG_SEC - REG_SEC] = time->tm_sec;
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buf[REG_MIN - REG_SEC] = time->tm_min;
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buf[REG_HOUR - REG_SEC] = time->tm_hour;
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buf[REG_MDAY - REG_SEC] = time->tm_mday;
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buf[REG_MON - REG_SEC] = time->tm_mon;
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buf[REG_YEAR - REG_SEC] = time->tm_year - 1900;
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buf[REG_WDAY - REG_SEC] = time->tm_wday;
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ret = dm_i2c_write(dev, REG_SEC, buf, sizeof(buf));
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if (ret < 0)
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return ret;
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return 0;
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}
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static int sandbox_rtc_reset(struct udevice *dev)
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{
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return dm_i2c_reg_write(dev, REG_RESET, 0);
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}
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static int sandbox_rtc_read8(struct udevice *dev, unsigned int reg)
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{
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return dm_i2c_reg_read(dev, reg);
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}
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static int sandbox_rtc_write8(struct udevice *dev, unsigned int reg, int val)
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{
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return dm_i2c_reg_write(dev, reg, val);
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}
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#if CONFIG_IS_ENABLED(ACPIGEN)
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static int sandbox_rtc_get_name(const struct udevice *dev, char *out_name)
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{
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return acpi_copy_name(out_name, "RTCC");
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}
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struct acpi_ops sandbox_rtc_acpi_ops = {
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.get_name = sandbox_rtc_get_name,
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};
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#endif
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static int sandbox_rtc_bind(struct udevice *dev)
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{
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#if CONFIG_IS_ENABLED(PLATDATA)
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struct sandbox_i2c_rtc_plat_data *plat = dev_get_plat(dev);
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/* Set up the emul_idx for i2c_emul_find() */
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i2c_emul_set_idx(dev, plat->dtplat.sandbox_emul->idx);
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#endif
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return 0;
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}
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static const struct rtc_ops sandbox_rtc_ops = {
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.get = sandbox_rtc_get,
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.set = sandbox_rtc_set,
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.reset = sandbox_rtc_reset,
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.read8 = sandbox_rtc_read8,
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.write8 = sandbox_rtc_write8,
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};
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static const struct udevice_id sandbox_rtc_ids[] = {
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{ .compatible = "sandbox-rtc" },
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{ }
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};
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U_BOOT_DRIVER(sandbox_rtc) = {
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.name = "sandbox_rtc",
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.id = UCLASS_RTC,
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.of_match = sandbox_rtc_ids,
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.ops = &sandbox_rtc_ops,
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.bind = sandbox_rtc_bind,
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ACPI_OPS_PTR(&sandbox_rtc_acpi_ops)
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};
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