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https://github.com/brain-hackers/u-boot-brain
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5d387d0df9
This commit adds emulation of sandbox PMIC device, which includes: - PMIC I2C emulation driver - PMIC I/O driver (UCLASS_PMIC) - PMIC regulator driver (UCLASS_REGULATOR) The sandbox PMIC has 12 significant registers and 4 as padding to 16 bytes, which allows using 'i2c md' command with the default count (16). The sandbox PMIC provides regulators: - 2x BUCK - 2x LDO Each, with adjustable output: - Enable state - Voltage - Current limit (LDO1/BUCK1 only) - Operation mode (different for BUCK and LDO) Each attribute has it's own register, beside the enable state, which depends on operation mode. The header file: sandbox_pmic.h includes PMIC's default register values, which are set on i2c pmic emul driver's probe() method. Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Acked-by: Simon Glass <sjg@chromium.org> Tested on sandbox: Tested-by: Simon Glass <sjg@chromium.org>
80 lines
1.8 KiB
C
80 lines
1.8 KiB
C
/*
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* Copyright (C) 2015 Samsung Electronics
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* Przemyslaw Marczak <p.marczak@samsung.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <fdtdec.h>
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#include <errno.h>
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#include <dm.h>
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#include <i2c.h>
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#include <power/pmic.h>
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#include <power/regulator.h>
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#include <power/sandbox_pmic.h>
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DECLARE_GLOBAL_DATA_PTR;
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static const struct pmic_child_info pmic_children_info[] = {
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{ .prefix = SANDBOX_OF_LDO_PREFIX, .driver = SANDBOX_LDO_DRIVER },
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{ .prefix = SANDBOX_OF_BUCK_PREFIX, .driver = SANDBOX_BUCK_DRIVER },
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{ },
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};
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static int sandbox_pmic_reg_count(struct udevice *dev)
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{
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return SANDBOX_PMIC_REG_COUNT;
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}
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static int sandbox_pmic_write(struct udevice *dev, uint reg,
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const uint8_t *buff, int len)
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{
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if (dm_i2c_write(dev, reg, buff, len)) {
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error("write error to device: %p register: %#x!", dev, reg);
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return -EIO;
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}
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return 0;
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}
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static int sandbox_pmic_read(struct udevice *dev, uint reg,
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uint8_t *buff, int len)
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{
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if (dm_i2c_read(dev, reg, buff, len)) {
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error("read error from device: %p register: %#x!", dev, reg);
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return -EIO;
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}
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return 0;
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}
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static int sandbox_pmic_bind(struct udevice *dev)
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{
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if (!pmic_bind_children(dev, dev->of_offset, pmic_children_info))
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error("%s:%d PMIC: %s - no child found!", __func__, __LINE__,
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dev->name);
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/* Always return success for this device - allows for PMIC I/O */
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return 0;
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}
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static struct dm_pmic_ops sandbox_pmic_ops = {
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.reg_count = sandbox_pmic_reg_count,
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.read = sandbox_pmic_read,
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.write = sandbox_pmic_write,
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};
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static const struct udevice_id sandbox_pmic_ids[] = {
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{ .compatible = "sandbox,pmic" },
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{ }
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};
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U_BOOT_DRIVER(sandbox_pmic) = {
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.name = "sandbox_pmic",
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.id = UCLASS_PMIC,
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.of_match = sandbox_pmic_ids,
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.bind = sandbox_pmic_bind,
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.ops = &sandbox_pmic_ops,
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};
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