linux-imx

/*

 * Rockchip eFuse Driver

 *

 * Copyright (c) 2015 Rockchip Electronics Co. Ltd.

 * Author: Caesar Wang <wxt@rock-chips.com>

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of version 2 of the GNU General Public License as

 * published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for

 * more details.

 */

​

#include <linux/clk.h>

#include <linux/delay.h>

#include <linux/device.h>

#include <linux/io.h>

#include <linux/module.h>

#include <linux/nvmem-provider.h>

#include <linux/slab.h>

#include <linux/of.h>

#include <linux/of_platform.h>

#include <linux/platform_device.h>

​

#define RK3288_A_SHIFT      6

#define RK3288_A_MASK       0x3ff

#define RK3288_PGENB        BIT(3)

#define RK3288_LOAD     BIT(2)

#define RK3288_STROBE       BIT(1)

#define RK3288_CSB      BIT(0)

​

#define RK3328_SECURE_SIZES 96

#define RK3328_INT_STATUS   0x0018

#define RK3328_DOUT     0x0020

#define RK3328_AUTO_CTRL    0x0024

#define RK3328_INT_FINISH   BIT(0)

#define RK3328_AUTO_ENB     BIT(0)

#define RK3328_AUTO_RD      BIT(1)

​

#define RK3399_A_SHIFT      16

#define RK3399_A_MASK       0x3ff

#define RK3399_NBYTES       4

#define RK3399_STROBSFTSEL  BIT(9)

#define RK3399_RSB      BIT(7)

#define RK3399_PD       BIT(5)

#define RK3399_PGENB        BIT(3)

#define RK3399_LOAD     BIT(2)

#define RK3399_STROBE       BIT(1)

#define RK3399_CSB      BIT(0)

​

#define REG_EFUSE_CTRL      0x0000

#define REG_EFUSE_DOUT      0x0004

​

struct rockchip_efuse_chip {

    struct device *dev;

    void __iomem *base;

    struct clk *clk;

};

​

static int rockchip_rk3288_efuse_read(void *context, unsigned int offset,