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/*
* Copyright (C) 2014 Steffen Trumtrar, Pengutronix
*
*
* with the PMIC init code taken from u-boot
* Copyright (C) 2012,2013 Lothar Waßmann <LW@KARO-electronics.de>
*
* 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.
*/
#define pr_fmt(fmt) "Karo-tx6: " fmt
#include <common.h>
#include <gpio.h>
#include <init.h>
#include <i2c/i2c.h>
#include <linux/clk.h>
#include <linux/kernel.h>
#include <environment.h>
#include <mach/bbu.h>
#include <mach/imx6.h>
#include <mfd/imx6q-iomuxc-gpr.h>
#include "pmic.h"
#define ETH_PHY_RST IMX_GPIO_NR(7, 6)
#define ETH_PHY_PWR IMX_GPIO_NR(3, 20)
#define ETH_PHY_INT IMX_GPIO_NR(7, 1)
static void eth_init(void)
{
void __iomem *iomux = (void *)MX6_IOMUXC_BASE_ADDR;
uint32_t val;
val = readl(iomux + IOMUXC_GPR1);
val |= IMX6Q_GPR1_ENET_CLK_SEL_ANATOP;
writel(val, iomux + IOMUXC_GPR1);
}
static struct {
unsigned char addr;
int (*init)(struct i2c_client *client);
const char *name;
} i2c_addrs[] = {
{ 0x3c, ltc3676_pmic_setup, "ltc3676" },
{ 0x32, rn5t618_pmic_setup, "rn5t618" },
{ 0x33, rn5t567_pmic_setup, "rn5t567" },
};
int setup_pmic_voltages(void)
{
struct i2c_adapter *adapter;
struct i2c_client client;
int ret = -ENODEV;
int i;
int bus = 0;
uint8_t reg;
adapter = i2c_get_adapter(bus);
if (!adapter) {
pr_err("i2c bus %d not found\n", bus);
return -ENODEV;
}
client.adapter = adapter;
for (i = 0; i < ARRAY_SIZE(i2c_addrs); i++) {
client.addr = i2c_addrs[i].addr;
pr_debug("Probing for I2C dev 0x%02x\n", client.addr);
ret = i2c_write_reg(&client, 0x00, ®, 0);
if (ret == 0) {
pr_info("Detected %s PMIC\n", i2c_addrs[i].name);
ret = i2c_addrs[i].init(&client);
goto out;
}
}
pr_err("No PMIC found\n");
out:
if (ret)
pr_err("PMIC setup failed with %s\n", strerror(-ret));
return ret;
}
#define IMX6_SRC_SBMR1 0x04
static int tx6x_devices_init(void)
{
void __iomem *src_base = IOMEM(MX6_SRC_BASE_ADDR);
uint32_t sbmr1;
if (!of_machine_is_compatible("karo,imx6dl-tx6dl") &&
!of_machine_is_compatible("karo,imx6q-tx6q"))
return 0;
barebox_set_hostname("tx6");
eth_init();
setup_pmic_voltages();
sbmr1 = readl(src_base + IMX6_SRC_SBMR1);
/*
* Check if this board is booted from eMMC or NAND to enable the
* corresponding device. We can't use the regular bootsource
* function here as it might return that we are in serial
* downloader mode. Even if we are SBMR1[7] indicates whether
* this board has eMMC or NAND.
*/
if (sbmr1 & (1 << 7)) {
imx6_bbu_nand_register_handler("nand", BBU_HANDLER_FLAG_DEFAULT);
of_device_enable_and_register_by_name("environment-nand");
of_device_enable_and_register_by_name("gpmi-nand@00112000");
} else {
imx6_bbu_internal_mmc_register_handler("eMMC", "/dev/mmc3.boot0",
BBU_HANDLER_FLAG_DEFAULT);
of_device_enable_and_register_by_name("environment-emmc");
of_device_enable_and_register_by_name("usdhc@0219c000");
}
return 0;
}
device_initcall(tx6x_devices_init);
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