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https://github.com/brain-hackers/u-boot-brain
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![Walter Lozano](/assets/img/avatar_default.png)
Currently when using OF_PLATDATA the binding between devices and drivers is done trying to match the compatible string in the node with a driver name. However, usually a single driver supports multiple compatible strings which causes that only devices which its compatible string matches a driver name get bound. To overcome this issue, this patch adds the U_BOOT_DRIVER_ALIAS macro, which generates no code at all, but allows an easy way to declare driver name aliases. Thanks to this, dtoc could be improve to look for the driver name based on its alias when it populates the U_BOOT_DEVICE entry. Signed-off-by: Walter Lozano <walter.lozano@collabora.com> Reviewed-by: Simon Glass <sjg@chromium.org>
199 lines
4.7 KiB
C
199 lines
4.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <log.h>
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#include <power/rk8xx_pmic.h>
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#include <power/pmic.h>
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static struct reg_data rk817_init_reg[] = {
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/* enable the under-voltage protection,
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* the under-voltage protection will shutdown the LDO3 and reset the PMIC
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*/
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{ RK817_BUCK4_CMIN, 0x60, 0x60},
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};
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static const struct pmic_child_info pmic_children_info[] = {
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{ .prefix = "DCDC_REG", .driver = "rk8xx_buck"},
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{ .prefix = "LDO_REG", .driver = "rk8xx_ldo"},
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{ .prefix = "SWITCH_REG", .driver = "rk8xx_switch"},
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{ },
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};
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static int rk8xx_reg_count(struct udevice *dev)
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{
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return RK808_NUM_OF_REGS;
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}
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static int rk8xx_write(struct udevice *dev, uint reg, const uint8_t *buff,
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int len)
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{
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int ret;
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ret = dm_i2c_write(dev, reg, buff, len);
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if (ret) {
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debug("write error to device: %p register: %#x!\n", dev, reg);
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return ret;
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}
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return 0;
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}
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static int rk8xx_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
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{
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int ret;
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ret = dm_i2c_read(dev, reg, buff, len);
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if (ret) {
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debug("read error from device: %p register: %#x!\n", dev, reg);
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return ret;
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}
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return 0;
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}
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#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
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static int rk8xx_bind(struct udevice *dev)
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{
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ofnode regulators_node;
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int children;
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regulators_node = dev_read_subnode(dev, "regulators");
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if (!ofnode_valid(regulators_node)) {
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debug("%s: %s regulators subnode not found!\n", __func__,
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dev->name);
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return -ENXIO;
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}
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debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
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children = pmic_bind_children(dev, regulators_node, pmic_children_info);
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if (!children)
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debug("%s: %s - no child found\n", __func__, dev->name);
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/* Always return success for this device */
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return 0;
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}
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#endif
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static int rk8xx_probe(struct udevice *dev)
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{
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struct rk8xx_priv *priv = dev_get_priv(dev);
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struct reg_data *init_data = NULL;
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int init_data_num = 0;
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int ret = 0, i, show_variant;
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u8 msb, lsb, id_msb, id_lsb;
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u8 on_source = 0, off_source = 0;
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u8 power_en0, power_en1, power_en2, power_en3;
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u8 value;
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/* read Chip variant */
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if (device_is_compatible(dev, "rockchip,rk817") ||
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device_is_compatible(dev, "rockchip,rk809")) {
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id_msb = RK817_ID_MSB;
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id_lsb = RK817_ID_LSB;
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} else {
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id_msb = ID_MSB;
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id_lsb = ID_LSB;
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}
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ret = rk8xx_read(dev, id_msb, &msb, 1);
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if (ret)
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return ret;
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ret = rk8xx_read(dev, id_lsb, &lsb, 1);
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if (ret)
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return ret;
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priv->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK;
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show_variant = priv->variant;
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switch (priv->variant) {
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case RK808_ID:
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show_variant = 0x808; /* RK808 hardware ID is 0 */
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break;
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case RK805_ID:
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case RK816_ID:
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case RK818_ID:
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on_source = RK8XX_ON_SOURCE;
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off_source = RK8XX_OFF_SOURCE;
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break;
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case RK809_ID:
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case RK817_ID:
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on_source = RK817_ON_SOURCE;
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off_source = RK817_OFF_SOURCE;
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init_data = rk817_init_reg;
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init_data_num = ARRAY_SIZE(rk817_init_reg);
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power_en0 = pmic_reg_read(dev, RK817_POWER_EN0);
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power_en1 = pmic_reg_read(dev, RK817_POWER_EN1);
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power_en2 = pmic_reg_read(dev, RK817_POWER_EN2);
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power_en3 = pmic_reg_read(dev, RK817_POWER_EN3);
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value = (power_en0 & 0x0f) | ((power_en1 & 0x0f) << 4);
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pmic_reg_write(dev, RK817_POWER_EN_SAVE0, value);
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value = (power_en2 & 0x0f) | ((power_en3 & 0x0f) << 4);
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pmic_reg_write(dev, RK817_POWER_EN_SAVE1, value);
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break;
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default:
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printf("Unknown PMIC: RK%x!!\n", priv->variant);
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return -EINVAL;
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}
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for (i = 0; i < init_data_num; i++) {
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ret = pmic_clrsetbits(dev,
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init_data[i].reg,
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init_data[i].mask,
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init_data[i].val);
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if (ret < 0) {
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printf("%s: i2c set reg 0x%x failed, ret=%d\n",
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__func__, init_data[i].reg, ret);
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}
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debug("%s: reg[0x%x] = 0x%x\n", __func__, init_data[i].reg,
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pmic_reg_read(dev, init_data[i].reg));
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}
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printf("PMIC: RK%x ", show_variant);
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if (on_source && off_source)
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printf("(on=0x%02x, off=0x%02x)",
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pmic_reg_read(dev, on_source),
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pmic_reg_read(dev, off_source));
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printf("\n");
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return 0;
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}
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static struct dm_pmic_ops rk8xx_ops = {
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.reg_count = rk8xx_reg_count,
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.read = rk8xx_read,
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.write = rk8xx_write,
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};
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static const struct udevice_id rk8xx_ids[] = {
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{ .compatible = "rockchip,rk805" },
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{ .compatible = "rockchip,rk808" },
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{ .compatible = "rockchip,rk809" },
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{ .compatible = "rockchip,rk816" },
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{ .compatible = "rockchip,rk817" },
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{ .compatible = "rockchip,rk818" },
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{ }
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};
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U_BOOT_DRIVER(rockchip_rk805) = {
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.name = "rockchip_rk805",
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.id = UCLASS_PMIC,
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.of_match = rk8xx_ids,
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#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
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.bind = rk8xx_bind,
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#endif
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.priv_auto_alloc_size = sizeof(struct rk8xx_priv),
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.probe = rk8xx_probe,
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.ops = &rk8xx_ops,
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};
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U_BOOT_DRIVER_ALIAS(rockchip_rk805, rockchip_rk808)
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