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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2015 Google, Inc
- * Written by Simon Glass <sjg@chromium.org>
- */
- #include <common.h>
- #include <dm.h>
- #include <errno.h>
- #include <log.h>
- #include <power/rk8xx_pmic.h>
- #include <power/pmic.h>
- static struct reg_data rk817_init_reg[] = {
- /* enable the under-voltage protection,
- * the under-voltage protection will shutdown the LDO3 and reset the PMIC
- */
- { RK817_BUCK4_CMIN, 0x60, 0x60},
- };
- static const struct pmic_child_info pmic_children_info[] = {
- { .prefix = "DCDC_REG", .driver = "rk8xx_buck"},
- { .prefix = "LDO_REG", .driver = "rk8xx_ldo"},
- { .prefix = "SWITCH_REG", .driver = "rk8xx_switch"},
- { },
- };
- static int rk8xx_reg_count(struct udevice *dev)
- {
- return RK808_NUM_OF_REGS;
- }
- static int rk8xx_write(struct udevice *dev, uint reg, const uint8_t *buff,
- int len)
- {
- int ret;
- ret = dm_i2c_write(dev, reg, buff, len);
- if (ret) {
- debug("write error to device: %p register: %#x!\n", dev, reg);
- return ret;
- }
- return 0;
- }
- static int rk8xx_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
- {
- int ret;
- ret = dm_i2c_read(dev, reg, buff, len);
- if (ret) {
- debug("read error from device: %p register: %#x!\n", dev, reg);
- return ret;
- }
- return 0;
- }
- #if CONFIG_IS_ENABLED(PMIC_CHILDREN)
- static int rk8xx_bind(struct udevice *dev)
- {
- ofnode regulators_node;
- int children;
- regulators_node = dev_read_subnode(dev, "regulators");
- if (!ofnode_valid(regulators_node)) {
- debug("%s: %s regulators subnode not found!\n", __func__,
- dev->name);
- return -ENXIO;
- }
- debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
- children = pmic_bind_children(dev, regulators_node, pmic_children_info);
- if (!children)
- debug("%s: %s - no child found\n", __func__, dev->name);
- /* Always return success for this device */
- return 0;
- }
- #endif
- static int rk8xx_probe(struct udevice *dev)
- {
- struct rk8xx_priv *priv = dev_get_priv(dev);
- struct reg_data *init_data = NULL;
- int init_data_num = 0;
- int ret = 0, i, show_variant;
- u8 msb, lsb, id_msb, id_lsb;
- u8 on_source = 0, off_source = 0;
- u8 power_en0, power_en1, power_en2, power_en3;
- u8 value;
- /* read Chip variant */
- if (device_is_compatible(dev, "rockchip,rk817") ||
- device_is_compatible(dev, "rockchip,rk809")) {
- id_msb = RK817_ID_MSB;
- id_lsb = RK817_ID_LSB;
- } else {
- id_msb = ID_MSB;
- id_lsb = ID_LSB;
- }
- ret = rk8xx_read(dev, id_msb, &msb, 1);
- if (ret)
- return ret;
- ret = rk8xx_read(dev, id_lsb, &lsb, 1);
- if (ret)
- return ret;
- priv->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK;
- show_variant = priv->variant;
- switch (priv->variant) {
- case RK808_ID:
- show_variant = 0x808; /* RK808 hardware ID is 0 */
- break;
- case RK805_ID:
- case RK816_ID:
- case RK818_ID:
- on_source = RK8XX_ON_SOURCE;
- off_source = RK8XX_OFF_SOURCE;
- break;
- case RK809_ID:
- case RK817_ID:
- on_source = RK817_ON_SOURCE;
- off_source = RK817_OFF_SOURCE;
- init_data = rk817_init_reg;
- init_data_num = ARRAY_SIZE(rk817_init_reg);
- power_en0 = pmic_reg_read(dev, RK817_POWER_EN0);
- power_en1 = pmic_reg_read(dev, RK817_POWER_EN1);
- power_en2 = pmic_reg_read(dev, RK817_POWER_EN2);
- power_en3 = pmic_reg_read(dev, RK817_POWER_EN3);
- value = (power_en0 & 0x0f) | ((power_en1 & 0x0f) << 4);
- pmic_reg_write(dev, RK817_POWER_EN_SAVE0, value);
- value = (power_en2 & 0x0f) | ((power_en3 & 0x0f) << 4);
- pmic_reg_write(dev, RK817_POWER_EN_SAVE1, value);
- break;
- default:
- printf("Unknown PMIC: RK%x!!\n", priv->variant);
- return -EINVAL;
- }
- for (i = 0; i < init_data_num; i++) {
- ret = pmic_clrsetbits(dev,
- init_data[i].reg,
- init_data[i].mask,
- init_data[i].val);
- if (ret < 0) {
- printf("%s: i2c set reg 0x%x failed, ret=%d\n",
- __func__, init_data[i].reg, ret);
- }
- debug("%s: reg[0x%x] = 0x%x\n", __func__, init_data[i].reg,
- pmic_reg_read(dev, init_data[i].reg));
- }
- printf("PMIC: RK%x ", show_variant);
- if (on_source && off_source)
- printf("(on=0x%02x, off=0x%02x)",
- pmic_reg_read(dev, on_source),
- pmic_reg_read(dev, off_source));
- printf("\n");
- return 0;
- }
- static struct dm_pmic_ops rk8xx_ops = {
- .reg_count = rk8xx_reg_count,
- .read = rk8xx_read,
- .write = rk8xx_write,
- };
- static const struct udevice_id rk8xx_ids[] = {
- { .compatible = "rockchip,rk805" },
- { .compatible = "rockchip,rk808" },
- { .compatible = "rockchip,rk809" },
- { .compatible = "rockchip,rk816" },
- { .compatible = "rockchip,rk817" },
- { .compatible = "rockchip,rk818" },
- { }
- };
- U_BOOT_DRIVER(rockchip_rk805) = {
- .name = "rockchip_rk805",
- .id = UCLASS_PMIC,
- .of_match = rk8xx_ids,
- #if CONFIG_IS_ENABLED(PMIC_CHILDREN)
- .bind = rk8xx_bind,
- #endif
- .priv_auto = sizeof(struct rk8xx_priv),
- .probe = rk8xx_probe,
- .ops = &rk8xx_ops,
- };
- DM_DRIVER_ALIAS(rockchip_rk805, rockchip_rk808)
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