1 // SPDX-License-Identifier: GPL-2.0+
4 * Lukasz Majewski, DENX Software Engineering, lukma@denx.de
13 #include <power/pmic.h>
15 DECLARE_GLOBAL_DATA_PTR;
17 static int mc34708_reg_count(struct udevice *dev)
19 return PMIC_NUM_OF_REGS;
22 static int mc34708_write(struct udevice *dev, uint reg, const u8 *buff,
28 if (len != MC34708_TRANSFER_SIZE)
32 * The MC34708 sends data with big endian format, hence we need to
33 * perform manual byte swap.
39 ret = dm_i2c_write(dev, reg, buf, len);
41 printf("write error to device: %p register: %#x!", dev, reg);
46 static int mc34708_read(struct udevice *dev, uint reg, u8 *buff, int len)
51 if (len != MC34708_TRANSFER_SIZE)
54 ret = dm_i2c_read(dev, reg, buf, len);
56 printf("read error from device: %p register: %#x!", dev, reg);
65 static int mc34708_probe(struct udevice *dev)
67 struct uc_pmic_priv *priv = dev_get_uclass_priv(dev);
69 priv->trans_len = MC34708_TRANSFER_SIZE;
72 * Handle PMIC Errata 37: APS mode not fully functional,
73 * use explicit PWM or PFM instead
75 pmic_clrsetbits(dev, MC34708_REG_SW12_OPMODE,
76 MC34708_SW1AMODE_MASK | MC34708_SW2MODE_MASK,
77 SW_MODE_PWMPWM | (SW_MODE_PWMPWM << 14u));
79 pmic_clrsetbits(dev, MC34708_REG_SW345_OPMODE,
80 MC34708_SW3MODE_MASK | MC34708_SW4AMODE_MASK |
81 MC34708_SW4BMODE_MASK | MC34708_SW5MODE_MASK,
82 SW_MODE_PWMPWM | (SW_MODE_PWMPWM << 6u) |
83 (SW_MODE_PWMPWM << 12u) | (SW_MODE_PWMPWM << 18u));
88 static struct dm_pmic_ops mc34708_ops = {
89 .reg_count = mc34708_reg_count,
91 .write = mc34708_write,
94 static const struct udevice_id mc34708_ids[] = {
95 { .compatible = "fsl,mc34708" },
99 U_BOOT_DRIVER(pmic_mc34708) = {
100 .name = "mc34708_pmic",
102 .of_match = mc34708_ids,
103 .probe = mc34708_probe,