2 * Copyright (C) 2015 Samsung Electronics
3 * Przemyslaw Marczak <p.marczak@samsung.com>
5 * SPDX-License-Identifier: GPL-2.0+
12 #include <power/pmic.h>
13 #include <power/sandbox_pmic.h>
15 DECLARE_GLOBAL_DATA_PTR;
18 * struct sandbox_i2c_pmic_plat_data - platform data for the PMIC
20 * @rw_reg: PMICs register of the chip I/O transaction
21 * @reg: PMICs registers array
23 struct sandbox_i2c_pmic_plat_data {
25 u8 reg[SANDBOX_PMIC_REG_COUNT];
28 static int sandbox_i2c_pmic_read_data(struct udevice *emul, uchar chip,
29 uchar *buffer, int len)
31 struct sandbox_i2c_pmic_plat_data *plat = dev_get_platdata(emul);
33 if (plat->rw_reg + len > SANDBOX_PMIC_REG_COUNT) {
34 error("Request exceeds PMIC register range! Max register: %#x",
35 SANDBOX_PMIC_REG_COUNT);
39 debug("Read PMIC: %#x at register: %#x count: %d\n",
40 (unsigned)chip & 0xff, plat->rw_reg, len);
42 memcpy(buffer, &plat->reg[plat->rw_reg], len);
47 static int sandbox_i2c_pmic_write_data(struct udevice *emul, uchar chip,
48 uchar *buffer, int len,
51 struct sandbox_i2c_pmic_plat_data *plat = dev_get_platdata(emul);
57 /* Set PMIC register for I/O */
58 plat->rw_reg = *buffer;
60 debug("Write PMIC: %#x at register: %#x count: %d\n",
61 (unsigned)chip & 0xff, plat->rw_reg, len);
63 /* For read operation, set (write) only chip reg */
70 if (plat->rw_reg + len > SANDBOX_PMIC_REG_COUNT) {
71 error("Request exceeds PMIC register range! Max register: %#x",
72 SANDBOX_PMIC_REG_COUNT);
75 memcpy(&plat->reg[plat->rw_reg], buffer, len);
80 static int sandbox_i2c_pmic_xfer(struct udevice *emul, struct i2c_msg *msg,
85 for (; nmsgs > 0; nmsgs--, msg++) {
86 bool next_is_read = nmsgs > 1 && (msg[1].flags & I2C_M_RD);
87 if (msg->flags & I2C_M_RD) {
88 ret = sandbox_i2c_pmic_read_data(emul, msg->addr,
91 ret = sandbox_i2c_pmic_write_data(emul, msg->addr,
103 static int sandbox_i2c_pmic_ofdata_to_platdata(struct udevice *emul)
105 struct sandbox_i2c_pmic_plat_data *plat = dev_get_platdata(emul);
106 const u8 *reg_defaults;
108 debug("%s:%d Setting PMIC default registers\n", __func__, __LINE__);
110 reg_defaults = dev_read_u8_array_ptr(emul, "reg-defaults",
111 SANDBOX_PMIC_REG_COUNT);
114 error("Property \"reg-defaults\" not found for device: %s!",
119 memcpy(&plat->reg, reg_defaults, SANDBOX_PMIC_REG_COUNT);
124 struct dm_i2c_ops sandbox_i2c_pmic_emul_ops = {
125 .xfer = sandbox_i2c_pmic_xfer,
128 static const struct udevice_id sandbox_i2c_pmic_ids[] = {
129 { .compatible = "sandbox,i2c-pmic" },
133 U_BOOT_DRIVER(sandbox_i2c_pmic_emul) = {
134 .name = "sandbox_i2c_pmic_emul",
135 .id = UCLASS_I2C_EMUL,
136 .of_match = sandbox_i2c_pmic_ids,
137 .ofdata_to_platdata = sandbox_i2c_pmic_ofdata_to_platdata,
138 .platdata_auto_alloc_size = sizeof(struct sandbox_i2c_pmic_plat_data),
139 .ops = &sandbox_i2c_pmic_emul_ops,