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04b9665b54
The davinci platform contains code that calls into the nvmem
subsystem, but that might be a loadable module, causing a
link error:
arch/arm/mach-davinci/built-in.o: In function `davinci_get_mac_addr':
:(.text+0x1088): undefined reference to `nvmem_device_read'
arch/arm/mach-davinci/built-in.o: In function `read_factory_config':
:(.text+0x214c): undefined reference to `nvmem_device_read'
Also, when NVMEM is completely disabled, the functions fail with
nonobvious error messages.
This ensures we only call the API functions when the code is actually
reachable from the board file, and otherwise prints a unique log
message.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: bec3c11bad ("misc: at24: replace memory_accessor with nvmem_device_read")
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
130 lines
3.0 KiB
C
130 lines
3.0 KiB
C
/*
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* Code commons to all DaVinci SoCs.
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*
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* Author: Mark A. Greer <mgreer@mvista.com>
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*
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* 2009 (c) MontaVista Software, Inc. This file is licensed under
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* the terms of the GNU General Public License version 2. This program
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* is licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*/
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#include <linux/module.h>
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#include <linux/io.h>
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#include <linux/etherdevice.h>
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#include <linux/davinci_emac.h>
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#include <linux/dma-mapping.h>
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#include <asm/tlb.h>
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#include <asm/mach/map.h>
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#include <mach/common.h>
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#include <mach/cputype.h>
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#include "clock.h"
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struct davinci_soc_info davinci_soc_info;
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EXPORT_SYMBOL(davinci_soc_info);
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void __iomem *davinci_intc_base;
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int davinci_intc_type;
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void davinci_get_mac_addr(struct nvmem_device *nvmem, void *context)
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{
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char *mac_addr = davinci_soc_info.emac_pdata->mac_addr;
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off_t offset = (off_t)context;
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if (!IS_BUILTIN(CONFIG_NVMEM)) {
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pr_warn("Cannot read MAC addr from EEPROM without CONFIG_NVMEM\n");
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return;
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}
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/* Read MAC addr from EEPROM */
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if (nvmem_device_read(nvmem, offset, ETH_ALEN, mac_addr) == ETH_ALEN)
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pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr);
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}
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static int __init davinci_init_id(struct davinci_soc_info *soc_info)
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{
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int i;
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struct davinci_id *dip;
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u8 variant;
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u16 part_no;
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void __iomem *base;
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base = ioremap(soc_info->jtag_id_reg, SZ_4K);
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if (!base) {
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pr_err("Unable to map JTAG ID register\n");
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return -ENOMEM;
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}
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soc_info->jtag_id = __raw_readl(base);
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iounmap(base);
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variant = (soc_info->jtag_id & 0xf0000000) >> 28;
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part_no = (soc_info->jtag_id & 0x0ffff000) >> 12;
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for (i = 0, dip = soc_info->ids; i < soc_info->ids_num;
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i++, dip++)
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/* Don't care about the manufacturer right now */
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if ((dip->part_no == part_no) && (dip->variant == variant)) {
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soc_info->cpu_id = dip->cpu_id;
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pr_info("DaVinci %s variant 0x%x\n", dip->name,
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dip->variant);
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return 0;
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}
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pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id);
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return -EINVAL;
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}
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void __init davinci_common_init(struct davinci_soc_info *soc_info)
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{
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int ret;
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if (!soc_info) {
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ret = -EINVAL;
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goto err;
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}
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memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info));
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if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0))
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iotable_init(davinci_soc_info.io_desc,
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davinci_soc_info.io_desc_num);
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/*
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* Normally devicemaps_init() would flush caches and tlb after
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* mdesc->map_io(), but we must also do it here because of the CPU
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* revision check below.
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*/
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local_flush_tlb_all();
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flush_cache_all();
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/*
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* We want to check CPU revision early for cpu_is_xxxx() macros.
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* IO space mapping must be initialized before we can do that.
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*/
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ret = davinci_init_id(&davinci_soc_info);
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if (ret < 0)
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goto err;
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if (davinci_soc_info.cpu_clks) {
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ret = davinci_clk_init(davinci_soc_info.cpu_clks);
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if (ret != 0)
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goto err;
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}
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return;
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err:
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panic("davinci_common_init: SoC Initialization failed\n");
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}
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void __init davinci_init_late(void)
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{
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davinci_cpufreq_init();
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davinci_pm_init();
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davinci_clk_disable_unused();
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}
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