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/*
* Copyright (C) 2013 Michael Burkey
* Based on code (C) Sascha Hauer, Pengutronix
* Based on code (C) Variscite, Ltd.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation.
*
*/
#define pr_fmt(fmt) "var-som-mx6: " fmt
#include <common.h>
#include <gpio.h>
#include <init.h>
#include <of.h>
#include <debug_ll.h>
#include <environment.h>
#include <asm/armlinux.h>
#include <generated/mach-types.h>
#include <partition.h>
#include <asm/io.h>
#include <asm/mmu.h>
#include <mach/generic.h>
#include <linux/sizes.h>
#include <mach/imx6.h>
#include <mach/devices-imx6.h>
#include <mach/iomux-mx6.h>
#include <spi/spi.h>
#include <mach/spi.h>
#include <i2c/i2c.h>
#define ETH_PHY_RST IMX_GPIO_NR(1, 25)
static int setup_pmic_voltages(void)
{
unsigned char value, rev_id = 0 ;
struct i2c_adapter *adapter = NULL;
struct i2c_client client;
int addr = -1, bus = 0;
/* I2C2 bus (2-1 = 1 in barebox numbering) */
bus = 1;
/* PFUZE100 device address is 0x08 */
addr = 0x08;
adapter = i2c_get_adapter(bus);
if (!adapter) {
pr_err("i2c bus %d not found\n", bus);
return -ENODEV;
}
client.adapter = adapter;
client.addr = addr;
/* Attempt to locate the PFUZE100 chip. */
if (i2c_read_reg(&client, 0x00, &value, 1) != 1) {
pr_err("Read device ID error!\n");
return -1;
}
if (i2c_read_reg(&client, 0x03, &rev_id, 1) != 1) {
pr_err("Read Rev ID error!\n");
return -1;
}
pr_info("Found PFUZE100! deviceid=%x,revid=%x\n", value, rev_id);
/* Set Gigabit Ethernet voltage (SOM v1.1/1.0)*/
value = 0x60;
if (i2c_write_reg(&client, 0x4a, &value, 1) != 1) {
pr_err("Set ETH error!\n");
return -EIO;
}
/* set VGEN3 to 2.5V */
value = 0x77;
if (i2c_write_reg(&client, 0x6e, &value, 1) != 1) {
pr_err("Set VGEN3 error!\n");
return -EIO;
}
return 0;
}
static int eth_phy_reset(void)
{
gpio_request(ETH_PHY_RST, "phy reset");
gpio_direction_output(ETH_PHY_RST, 0);
mdelay(1);
gpio_set_value(ETH_PHY_RST, 1);
return 0;
}
static int variscite_custom_init(void)
{
if (!of_machine_is_compatible("variscite,imx6q-custom"))
return 0;
barebox_set_hostname("var-som-mx6");
setup_pmic_voltages();
eth_phy_reset();
armlinux_set_architecture(MACH_TYPE_VAR_SOM_MX6);
pr_debug("Completing custom_init()\n");
return 0;
}
device_initcall(variscite_custom_init);
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