2 * Copyright (C) 2015 Samsung Electronics
3 * Przemyslaw Marczak <p.marczak@samsung.com>
5 * SPDX-License-Identifier: GPL-2.0+
13 #include <power/pmic.h>
14 #include <power/sandbox_pmic.h>
16 DECLARE_GLOBAL_DATA_PTR;
19 * struct sandbox_i2c_pmic_plat_data - platform data for the PMIC
21 * @rw_reg: PMICs register of the chip I/O transaction
22 * @reg: PMICs registers array
24 struct sandbox_i2c_pmic_plat_data {
26 u8 reg[SANDBOX_PMIC_REG_COUNT];
29 static int sandbox_i2c_pmic_read_data(struct udevice *emul, uchar chip,
30 uchar *buffer, int len)
32 struct sandbox_i2c_pmic_plat_data *plat = dev_get_platdata(emul);
34 if (plat->rw_reg + len > SANDBOX_PMIC_REG_COUNT) {
35 error("Request exceeds PMIC register range! Max register: %#x",
36 SANDBOX_PMIC_REG_COUNT);
40 debug("Read PMIC: %#x at register: %#x count: %d\n",
41 (unsigned)chip & 0xff, plat->rw_reg, len);
43 memcpy(buffer, &plat->reg[plat->rw_reg], len);
48 static int sandbox_i2c_pmic_write_data(struct udevice *emul, uchar chip,
49 uchar *buffer, int len,
52 struct sandbox_i2c_pmic_plat_data *plat = dev_get_platdata(emul);
58 /* Set PMIC register for I/O */
59 plat->rw_reg = *buffer;
61 debug("Write PMIC: %#x at register: %#x count: %d\n",
62 (unsigned)chip & 0xff, plat->rw_reg, len);
64 /* For read operation, set (write) only chip reg */
71 if (plat->rw_reg + len > SANDBOX_PMIC_REG_COUNT) {
72 error("Request exceeds PMIC register range! Max register: %#x",
73 SANDBOX_PMIC_REG_COUNT);
76 memcpy(&plat->reg[plat->rw_reg], buffer, len);
81 static int sandbox_i2c_pmic_xfer(struct udevice *emul, struct i2c_msg *msg,
86 for (; nmsgs > 0; nmsgs--, msg++) {
87 bool next_is_read = nmsgs > 1 && (msg[1].flags & I2C_M_RD);
88 if (msg->flags & I2C_M_RD) {
89 ret = sandbox_i2c_pmic_read_data(emul, msg->addr,
92 ret = sandbox_i2c_pmic_write_data(emul, msg->addr,
104 static int sandbox_i2c_pmic_ofdata_to_platdata(struct udevice *emul)
106 struct sandbox_i2c_pmic_plat_data *plat = dev_get_platdata(emul);
107 const u8 *reg_defaults;
109 debug("%s:%d Setting PMIC default registers\n", __func__, __LINE__);
111 reg_defaults = fdtdec_locate_byte_array(gd->fdt_blob, emul->of_offset,
113 SANDBOX_PMIC_REG_COUNT);
116 error("Property \"reg-defaults\" not found for device: %s!",
121 memcpy(&plat->reg, reg_defaults, SANDBOX_PMIC_REG_COUNT);
126 struct dm_i2c_ops sandbox_i2c_pmic_emul_ops = {
127 .xfer = sandbox_i2c_pmic_xfer,
130 static const struct udevice_id sandbox_i2c_pmic_ids[] = {
131 { .compatible = "sandbox,i2c-pmic" },
135 U_BOOT_DRIVER(sandbox_i2c_pmic_emul) = {
136 .name = "sandbox_i2c_pmic_emul",
137 .id = UCLASS_I2C_EMUL,
138 .of_match = sandbox_i2c_pmic_ids,
139 .ofdata_to_platdata = sandbox_i2c_pmic_ofdata_to_platdata,
140 .platdata_auto_alloc_size = sizeof(struct sandbox_i2c_pmic_plat_data),
141 .ops = &sandbox_i2c_pmic_emul_ops,