1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2015 Samsung Electronics
4 * Przemyslaw Marczak <p.marczak@samsung.com>
11 #include <power/pmic.h>
12 #include <power/sandbox_pmic.h>
15 * struct sandbox_i2c_pmic_plat_data - platform data for the PMIC
17 * @rw_reg: PMICs register of the chip I/O transaction
18 * @reg: PMICs registers array
20 struct sandbox_i2c_pmic_plat_data {
22 u8 reg[SANDBOX_PMIC_REG_COUNT];
25 static int sandbox_i2c_pmic_read_data(struct udevice *emul, uchar chip,
26 uchar *buffer, int len)
28 struct sandbox_i2c_pmic_plat_data *plat = dev_get_platdata(emul);
30 if (plat->rw_reg + len > SANDBOX_PMIC_REG_COUNT) {
31 pr_err("Request exceeds PMIC register range! Max register: %#x",
32 SANDBOX_PMIC_REG_COUNT);
36 debug("Read PMIC: %#x at register: %#x count: %d\n",
37 (unsigned)chip & 0xff, plat->rw_reg, len);
39 memcpy(buffer, &plat->reg[plat->rw_reg], len);
44 static int sandbox_i2c_pmic_write_data(struct udevice *emul, uchar chip,
45 uchar *buffer, int len,
48 struct sandbox_i2c_pmic_plat_data *plat = dev_get_platdata(emul);
54 /* Set PMIC register for I/O */
55 plat->rw_reg = *buffer;
57 debug("Write PMIC: %#x at register: %#x count: %d\n",
58 (unsigned)chip & 0xff, plat->rw_reg, len);
60 /* For read operation, set (write) only chip reg */
67 if (plat->rw_reg + len > SANDBOX_PMIC_REG_COUNT) {
68 pr_err("Request exceeds PMIC register range! Max register: %#x",
69 SANDBOX_PMIC_REG_COUNT);
72 memcpy(&plat->reg[plat->rw_reg], buffer, len);
77 static int sandbox_i2c_pmic_xfer(struct udevice *emul, struct i2c_msg *msg,
82 for (; nmsgs > 0; nmsgs--, msg++) {
83 bool next_is_read = nmsgs > 1 && (msg[1].flags & I2C_M_RD);
84 if (msg->flags & I2C_M_RD) {
85 ret = sandbox_i2c_pmic_read_data(emul, msg->addr,
88 ret = sandbox_i2c_pmic_write_data(emul, msg->addr,
100 static int sandbox_i2c_pmic_ofdata_to_platdata(struct udevice *emul)
102 struct sandbox_i2c_pmic_plat_data *plat = dev_get_platdata(emul);
103 const u8 *reg_defaults;
105 debug("%s:%d Setting PMIC default registers\n", __func__, __LINE__);
107 reg_defaults = dev_read_u8_array_ptr(emul, "reg-defaults",
108 SANDBOX_PMIC_REG_COUNT);
111 pr_err("Property \"reg-defaults\" not found for device: %s!",
116 memcpy(&plat->reg, reg_defaults, SANDBOX_PMIC_REG_COUNT);
121 struct dm_i2c_ops sandbox_i2c_pmic_emul_ops = {
122 .xfer = sandbox_i2c_pmic_xfer,
125 static const struct udevice_id sandbox_i2c_pmic_ids[] = {
126 { .compatible = "sandbox,i2c-pmic" },
130 U_BOOT_DRIVER(sandbox_i2c_pmic_emul) = {
131 .name = "sandbox_i2c_pmic_emul",
132 .id = UCLASS_I2C_EMUL,
133 .of_match = sandbox_i2c_pmic_ids,
134 .ofdata_to_platdata = sandbox_i2c_pmic_ofdata_to_platdata,
135 .platdata_auto_alloc_size = sizeof(struct sandbox_i2c_pmic_plat_data),
136 .ops = &sandbox_i2c_pmic_emul_ops,