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dc8053eaee
Add interface for sysinfo to access a data area from the platform. This is useful to save/read a memory region of platform-specific data. Signed-off-by: Raymond Mao <raymond.mao@linaro.org>
128 lines
2.4 KiB
C
128 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2017
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* Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
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*/
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#define LOG_CATEGORY UCLASS_SYSINFO
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#include <dm.h>
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#include <sysinfo.h>
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struct sysinfo_priv {
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bool detected;
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};
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int sysinfo_get(struct udevice **devp)
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{
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int ret = uclass_first_device_err(UCLASS_SYSINFO, devp);
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/*
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* There is some very dodgy error handling in gazerbeam,
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* do not return a device on error.
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*/
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if (ret)
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*devp = NULL;
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return ret;
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}
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int sysinfo_detect(struct udevice *dev)
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{
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int ret;
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struct sysinfo_priv *priv = dev_get_uclass_priv(dev);
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struct sysinfo_ops *ops = sysinfo_get_ops(dev);
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if (!ops->detect)
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return -ENOSYS;
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ret = ops->detect(dev);
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if (!ret)
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priv->detected = true;
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return ret;
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}
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int sysinfo_get_fit_loadable(struct udevice *dev, int index, const char *type,
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const char **strp)
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{
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struct sysinfo_priv *priv = dev_get_uclass_priv(dev);
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struct sysinfo_ops *ops = sysinfo_get_ops(dev);
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if (!priv->detected)
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return -EPERM;
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if (!ops->get_fit_loadable)
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return -ENOSYS;
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return ops->get_fit_loadable(dev, index, type, strp);
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}
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int sysinfo_get_bool(struct udevice *dev, int id, bool *val)
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{
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struct sysinfo_priv *priv = dev_get_uclass_priv(dev);
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struct sysinfo_ops *ops = sysinfo_get_ops(dev);
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if (!priv->detected)
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return -EPERM;
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if (!ops->get_bool)
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return -ENOSYS;
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return ops->get_bool(dev, id, val);
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}
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int sysinfo_get_int(struct udevice *dev, int id, int *val)
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{
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struct sysinfo_priv *priv = dev_get_uclass_priv(dev);
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struct sysinfo_ops *ops = sysinfo_get_ops(dev);
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if (!priv->detected)
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return -EPERM;
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if (!ops->get_int)
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return -ENOSYS;
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return ops->get_int(dev, id, val);
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}
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int sysinfo_get_str(struct udevice *dev, int id, size_t size, char *val)
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{
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struct sysinfo_priv *priv = dev_get_uclass_priv(dev);
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struct sysinfo_ops *ops = sysinfo_get_ops(dev);
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if (!priv->detected)
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return -EPERM;
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if (!ops->get_str)
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return -ENOSYS;
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return ops->get_str(dev, id, size, val);
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}
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int sysinfo_get_data(struct udevice *dev, int id, void **data, size_t *size)
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{
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struct sysinfo_priv *priv;
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struct sysinfo_ops *ops;
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if (!dev)
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return -ENOSYS;
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priv = dev_get_uclass_priv(dev);
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ops = sysinfo_get_ops(dev);
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if (!priv->detected)
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return -EPERM;
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if (!ops->get_data)
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return -ENOSYS;
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return ops->get_data(dev, id, data, size);
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}
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UCLASS_DRIVER(sysinfo) = {
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.id = UCLASS_SYSINFO,
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.name = "sysinfo",
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.post_bind = dm_scan_fdt_dev,
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.per_device_auto = sizeof(bool),
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};
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