136 lines
3.4 KiB
C
136 lines
3.4 KiB
C
/*
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* Copyright (C) 2014 Steffen Trumtrar, Pengutronix
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*
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*
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* with the PMIC init code taken from u-boot
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* Copyright (C) 2012,2013 Lothar Waßmann <LW@KARO-electronics.de>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#define pr_fmt(fmt) "Karo-tx6: " fmt
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#include <common.h>
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#include <gpio.h>
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#include <init.h>
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#include <i2c/i2c.h>
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#include <linux/clk.h>
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#include <linux/kernel.h>
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#include <environment.h>
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#include <mach/bbu.h>
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#include <mach/imx6.h>
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#include <mfd/imx6q-iomuxc-gpr.h>
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#include "pmic.h"
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#define ETH_PHY_RST IMX_GPIO_NR(7, 6)
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#define ETH_PHY_PWR IMX_GPIO_NR(3, 20)
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#define ETH_PHY_INT IMX_GPIO_NR(7, 1)
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static void eth_init(void)
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{
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void __iomem *iomux = (void *)MX6_IOMUXC_BASE_ADDR;
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uint32_t val;
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val = readl(iomux + IOMUXC_GPR1);
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val |= IMX6Q_GPR1_ENET_CLK_SEL_ANATOP;
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writel(val, iomux + IOMUXC_GPR1);
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}
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static struct {
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unsigned char addr;
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int (*init)(struct i2c_client *client);
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const char *name;
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} i2c_addrs[] = {
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{ 0x3c, ltc3676_pmic_setup, "ltc3676" },
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{ 0x32, rn5t618_pmic_setup, "rn5t618" },
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{ 0x33, rn5t567_pmic_setup, "rn5t567" },
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};
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int setup_pmic_voltages(void)
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{
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struct i2c_adapter *adapter;
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struct i2c_client client;
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int ret = -ENODEV;
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int i;
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int bus = 0;
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uint8_t reg;
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adapter = i2c_get_adapter(bus);
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if (!adapter) {
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pr_err("i2c bus %d not found\n", bus);
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return -ENODEV;
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}
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client.adapter = adapter;
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for (i = 0; i < ARRAY_SIZE(i2c_addrs); i++) {
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client.addr = i2c_addrs[i].addr;
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pr_debug("Probing for I2C dev 0x%02x\n", client.addr);
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ret = i2c_write_reg(&client, 0x00, ®, 0);
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if (ret == 0) {
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pr_info("Detected %s PMIC\n", i2c_addrs[i].name);
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ret = i2c_addrs[i].init(&client);
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goto out;
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}
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}
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pr_err("No PMIC found\n");
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out:
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if (ret)
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pr_err("PMIC setup failed with %s\n", strerror(-ret));
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return ret;
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}
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#define IMX6_SRC_SBMR1 0x04
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static int tx6x_devices_init(void)
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{
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void __iomem *src_base = IOMEM(MX6_SRC_BASE_ADDR);
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uint32_t sbmr1;
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if (!of_machine_is_compatible("karo,imx6dl-tx6dl") &&
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!of_machine_is_compatible("karo,imx6q-tx6q"))
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return 0;
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barebox_set_hostname("tx6");
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eth_init();
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setup_pmic_voltages();
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sbmr1 = readl(src_base + IMX6_SRC_SBMR1);
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/*
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* Check if this board is booted from eMMC or NAND to enable the
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* corresponding device. We can't use the regular bootsource
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* function here as it might return that we are in serial
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* downloader mode. Even if we are SBMR1[7] indicates whether
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* this board has eMMC or NAND.
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*/
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if (sbmr1 & (1 << 7)) {
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imx6_bbu_nand_register_handler("nand", BBU_HANDLER_FLAG_DEFAULT);
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of_device_enable_and_register_by_name("environment-nand");
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of_device_enable_and_register_by_name("gpmi-nand@00112000");
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} else {
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imx6_bbu_internal_mmc_register_handler("eMMC", "/dev/mmc3.boot0",
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BBU_HANDLER_FLAG_DEFAULT);
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of_device_enable_and_register_by_name("environment-emmc");
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of_device_enable_and_register_by_name("usdhc@0219c000");
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}
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return 0;
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}
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device_initcall(tx6x_devices_init);
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