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https://xff.cz/git/u-boot/
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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
162 lines
3.2 KiB
C
162 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018-2022 Denx Software Engineering GmbH
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* Heiko Schocher <hs@denx.de>
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* Philip Oberfichtner <pro@denx.de>
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*
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* A bootcount driver using the registers MEMA - MEMD on the PFUZE100.
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* This works only, if the PMIC is not connected to a battery.
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*/
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#include <common.h>
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#include <bootcount.h>
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#include <dm.h>
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#include <power/pmic.h>
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#include <power/pfuze100_pmic.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define PFUZE_BC_MAGIC 0xdead
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struct bootcount_pmic_priv {
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struct udevice *pmic;
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};
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static int pfuze100_get_magic(struct udevice *dev, u32 *magic)
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{
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int ret;
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ret = pmic_reg_read(dev, PFUZE100_MEMA);
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if (ret < 0)
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return ret;
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*magic = ret;
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ret = pmic_reg_read(dev, PFUZE100_MEMB);
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if (ret < 0)
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return ret;
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*magic += ret << 8;
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return 0;
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}
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static int pfuze100_set_magic(struct udevice *dev)
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{
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int ret;
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ret = pmic_reg_write(dev, PFUZE100_MEMA, PFUZE_BC_MAGIC & 0xff);
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if (ret)
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return ret;
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ret = pmic_reg_write(dev, PFUZE100_MEMB, (PFUZE_BC_MAGIC >> 8) & 0xff);
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return ret;
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}
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static int pfuze100_get_value(struct udevice *dev, u32 *a)
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{
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int ret;
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ret = pmic_reg_read(dev, PFUZE100_MEMC);
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if (ret < 0)
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return ret;
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*a = ret;
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ret = pmic_reg_read(dev, PFUZE100_MEMD);
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if (ret < 0)
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return ret;
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*a += ret << 8;
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return 0;
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}
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static int pfuze100_set_value(struct udevice *dev, u32 val)
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{
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int ret;
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ret = pmic_reg_write(dev, PFUZE100_MEMC, val & 0xff);
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if (ret)
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return ret;
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ret = pmic_reg_write(dev, PFUZE100_MEMD, (val >> 8) & 0xff);
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return ret;
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}
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static int bootcount_pmic_set(struct udevice *dev, const u32 a)
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{
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struct bootcount_pmic_priv *priv = dev_get_priv(dev);
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if (pfuze100_set_magic(priv->pmic)) {
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debug("%s: writing magic failed\n", __func__);
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return -EIO;
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}
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if (pfuze100_set_value(priv->pmic, a)) {
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debug("%s: writing value failed\n", __func__);
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return -EIO;
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}
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return 0;
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}
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static int bootcount_pmic_get(struct udevice *dev, u32 *a)
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{
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struct bootcount_pmic_priv *priv = dev_get_priv(dev);
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u32 magic;
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if (pfuze100_get_magic(priv->pmic, &magic)) {
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debug("%s: reading magic failed\n", __func__);
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return -EIO;
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}
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if (magic != PFUZE_BC_MAGIC) {
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*a = 0;
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return 0;
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}
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if (pfuze100_get_value(priv->pmic, a)) {
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debug("%s: reading value failed\n", __func__);
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return -EIO;
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}
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return 0;
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}
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static int bootcount_pmic_probe(struct udevice *dev)
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{
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struct ofnode_phandle_args phandle_args;
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struct bootcount_pmic_priv *priv = dev_get_priv(dev);
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struct udevice *pmic;
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if (dev_read_phandle_with_args(dev, "pmic", NULL, 0, 0, &phandle_args)) {
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debug("%s: pmic backing device not specified\n", dev->name);
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return -ENOENT;
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}
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if (uclass_get_device_by_ofnode(UCLASS_PMIC, phandle_args.node, &pmic)) {
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debug("%s: could not get backing device\n", dev->name);
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return -ENODEV;
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}
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priv->pmic = pmic;
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return 0;
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}
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static const struct bootcount_ops bootcount_pmic_ops = {
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.get = bootcount_pmic_get,
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.set = bootcount_pmic_set,
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};
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static const struct udevice_id bootcount_pmic_ids[] = {
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{ .compatible = "u-boot,bootcount-pmic" },
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{ }
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};
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U_BOOT_DRIVER(bootcount_pmic) = {
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.name = "bootcount-pmic",
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.id = UCLASS_BOOTCOUNT,
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.priv_auto = sizeof(struct bootcount_pmic_priv),
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.probe = bootcount_pmic_probe,
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.of_match = bootcount_pmic_ids,
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.ops = &bootcount_pmic_ops,
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};
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