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 {
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_idx + len > plat->buf_size) {
34 pr_err("Request exceeds PMIC register range! Max register: %#x",
39 debug("Read PMIC: %#x at register: %#x idx: %#x count: %d\n",
40 (unsigned int)chip & 0xff, plat->rw_reg, plat->rw_idx, len);
42 memcpy(buffer, plat->reg + plat->rw_idx, 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;
59 plat->rw_idx = plat->rw_reg * plat->trans_len;
61 debug("Write PMIC: %#x at register: %#x idx: %#x count: %d\n",
62 (unsigned int)chip & 0xff, plat->rw_reg, plat->rw_idx, len);
64 /* For read operation, set (write) only chip reg */
71 if (plat->rw_idx + len > plat->buf_size) {
72 pr_err("Request exceeds PMIC register range! Max register: %#x",
76 memcpy(plat->reg + plat->rw_idx, 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 struct udevice *pmic_dev = dev_get_parent(emul);
108 struct uc_pmic_priv *priv = dev_get_uclass_priv(pmic_dev);
109 const u8 *reg_defaults;
111 debug("%s:%d Setting PMIC default registers\n", __func__, __LINE__);
112 plat->reg_count = pmic_reg_count(pmic_dev);
113 plat->trans_len = priv->trans_len;
114 plat->buf_size = plat->reg_count * plat->trans_len;
116 plat->reg = calloc(1, plat->buf_size);
118 debug("Canot allocate memory (%d B) for PMIC I2C emulation!\n",
123 reg_defaults = dev_read_u8_array_ptr(emul, "reg-defaults",
127 pr_err("Property \"reg-defaults\" not found for device: %s!",
133 memcpy(plat->reg, reg_defaults, plat->buf_size);
138 struct dm_i2c_ops sandbox_i2c_pmic_emul_ops = {
139 .xfer = sandbox_i2c_pmic_xfer,
142 static const struct udevice_id sandbox_i2c_pmic_ids[] = {
143 { .compatible = "sandbox,i2c-pmic" },
147 U_BOOT_DRIVER(sandbox_i2c_pmic_emul) = {
148 .name = "sandbox_i2c_pmic_emul",
149 .id = UCLASS_I2C_EMUL,
150 .of_match = sandbox_i2c_pmic_ids,
151 .ofdata_to_platdata = sandbox_i2c_pmic_ofdata_to_platdata,
152 .platdata_auto_alloc_size = sizeof(struct sandbox_i2c_pmic_plat_data),
153 .ops = &sandbox_i2c_pmic_emul_ops,