87 lines
1.7 KiB
C
87 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Qualcomm pm8916 pmic driver
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*
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* (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <power/pmic.h>
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#include <spmi/spmi.h>
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#define PID_SHIFT 8
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#define PID_MASK (0xFF << PID_SHIFT)
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#define REG_MASK 0xFF
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struct pm8916_priv {
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uint32_t usid; /* Slave ID on SPMI bus */
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};
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static int pm8916_reg_count(struct udevice *dev)
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{
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return 0xFFFF;
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}
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static int pm8916_write(struct udevice *dev, uint reg, const uint8_t *buff,
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int len)
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{
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struct pm8916_priv *priv = dev_get_priv(dev);
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if (len != 1)
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return -EINVAL;
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return spmi_reg_write(dev->parent, priv->usid,
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(reg & PID_MASK) >> PID_SHIFT, reg & REG_MASK,
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*buff);
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}
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static int pm8916_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
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{
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struct pm8916_priv *priv = dev_get_priv(dev);
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int val;
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if (len != 1)
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return -EINVAL;
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val = spmi_reg_read(dev->parent, priv->usid,
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(reg & PID_MASK) >> PID_SHIFT, reg & REG_MASK);
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if (val < 0)
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return val;
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*buff = val;
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return 0;
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}
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static struct dm_pmic_ops pm8916_ops = {
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.reg_count = pm8916_reg_count,
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.read = pm8916_read,
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.write = pm8916_write,
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};
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static const struct udevice_id pm8916_ids[] = {
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{ .compatible = "qcom,spmi-pmic" },
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{ }
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};
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static int pm8916_probe(struct udevice *dev)
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{
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struct pm8916_priv *priv = dev_get_priv(dev);
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priv->usid = dev_read_addr(dev);
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if (priv->usid == FDT_ADDR_T_NONE)
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return -EINVAL;
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return 0;
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}
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U_BOOT_DRIVER(pmic_pm8916) = {
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.name = "pmic_pm8916",
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.id = UCLASS_PMIC,
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.of_match = pm8916_ids,
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.bind = dm_scan_fdt_dev,
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.probe = pm8916_probe,
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.ops = &pm8916_ops,
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.priv_auto = sizeof(struct pm8916_priv),
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};
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