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misc: otp: realize otp interface layer function 

Realize otp read & write functions for application layer calling.

Signed-off-by: Jason Zhu <jason.zhu@rock-chips.com>
Change-Id: Ic8f698b36fce4c1c6cd7a2848afd370567b43448
This commit is contained in:
Jason Zhu 2020-04-20 16:00:20 +08:00 committed by Jianhong Chen
parent f9519410b1
commit 6a8fa29e04
3 changed files with 60 additions and 1 deletions
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2
drivers/misc/Makefile
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@ -56,4 +56,4 @@ obj-$(CONFIG_ROCKCHIP_OTP) += rockchip-otp.o
obj-$(CONFIG_$(SPL_TPL_)ROCKCHIP_SECURE_OTP) += rockchip-secure-otp.o
obj-$(CONFIG_$(SPL_TPL_)ROCKCHIP_SECURE_OTP_V2) += rockchip-secure-otp-v2.o
obj-$(CONFIG_$(SPL_TPL_)ROCKCHIP_HW_DECOMPRESS) += rockchip_decompress.o
obj-$(CONFIG_$(SPL_TPL_)ROCKCHIP_HW_DECOMPRESS) += misc_decompress.o
obj-$(CONFIG_$(SPL_TPL_)MISC) += misc_decompress.o misc_otp.o

46
drivers/misc/misc_otp.c Normal file
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@ -0,0 +1,46 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2020 Rockchip Electronics Co., Ltd
*/
#include <common.h>
#include <dm.h>
#include <dm/uclass.h>
#include <misc.h>
struct udevice *misc_otp_get_device(u32 capability)
{
const struct misc_ops *ops;
struct udevice *dev;
struct uclass *uc;
int ret;
u32 cap;
ret = uclass_get(UCLASS_MISC, &uc);
if (ret)
return NULL;
for (uclass_first_device(UCLASS_MISC, &dev);
dev;
uclass_next_device(&dev)) {
ops = device_get_ops(dev);
if (!ops || !ops->ioctl)
continue;
cap = ops->ioctl(dev, IOCTL_REQ_CAPABILITY, NULL);
if ((cap & capability) == capability)
return dev;
}
return NULL;
}
int misc_otp_read(struct udevice *dev, int offset, void *buf, int size)
{
return misc_read(dev, offset, buf, size);
}
int misc_otp_write(struct udevice *dev, int offset, const void *buf, int size)
{
return misc_write(dev, offset, (void *)buf, size);
}

13
include/misc_otp.h Normal file
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@ -0,0 +1,13 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) Copyright 2020 Rockchip Electronics Co., Ltd
*/
#ifndef __MISC_OTP_H__
#define __MISC_OTP_H__
struct udevice *misc_otp_get_device(u32 capability);
int misc_otp_read(struct udevice *dev, int offset, void *buf, int size);
int misc_otp_write(struct udevice *dev, int offset, const void *buf, int size);
#endif