diff options
Diffstat (limited to 'arch/mips/tx4938/toshiba_rbtx4938/spi_eeprom.c')
-rw-r--r-- | arch/mips/tx4938/toshiba_rbtx4938/spi_eeprom.c | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/arch/mips/tx4938/toshiba_rbtx4938/spi_eeprom.c b/arch/mips/tx4938/toshiba_rbtx4938/spi_eeprom.c deleted file mode 100644 index 4d6b4ade5e8..00000000000 --- a/arch/mips/tx4938/toshiba_rbtx4938/spi_eeprom.c +++ /dev/null @@ -1,99 +0,0 @@ -/* - * linux/arch/mips/tx4938/toshiba_rbtx4938/spi_eeprom.c - * Copyright (C) 2000-2001 Toshiba Corporation - * - * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the - * terms of the GNU General Public License version 2. This program is - * licensed "as is" without any warranty of any kind, whether express - * or implied. - * - * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com) - */ -#include <linux/init.h> -#include <linux/device.h> -#include <linux/spi/spi.h> -#include <linux/spi/eeprom.h> -#include <asm/tx4938/spi.h> - -#define AT250X0_PAGE_SIZE 8 - -/* register board information for at25 driver */ -int __init spi_eeprom_register(int chipid) -{ - static struct spi_eeprom eeprom = { - .name = "at250x0", - .byte_len = 128, - .page_size = AT250X0_PAGE_SIZE, - .flags = EE_ADDR1, - }; - struct spi_board_info info = { - .modalias = "at25", - .max_speed_hz = 1500000, /* 1.5Mbps */ - .bus_num = 0, - .chip_select = chipid, - .platform_data = &eeprom, - /* Mode 0: High-Active, Sample-Then-Shift */ - }; - - return spi_register_board_info(&info, 1); -} - -/* simple temporary spi driver to provide early access to seeprom. */ - -static struct read_param { - int chipid; - int address; - unsigned char *buf; - int len; -} *read_param; - -static int __init early_seeprom_probe(struct spi_device *spi) -{ - int stat = 0; - u8 cmd[2]; - int len = read_param->len; - char *buf = read_param->buf; - int address = read_param->address; - - dev_info(&spi->dev, "spiclk %u KHz.\n", - (spi->max_speed_hz + 500) / 1000); - if (read_param->chipid != spi->chip_select) - return -ENODEV; - while (len > 0) { - /* spi_write_then_read can only work with small chunk */ - int c = len < AT250X0_PAGE_SIZE ? len : AT250X0_PAGE_SIZE; - cmd[0] = 0x03; /* AT25_READ */ - cmd[1] = address; - stat = spi_write_then_read(spi, cmd, sizeof(cmd), buf, c); - buf += c; - len -= c; - address += c; - } - return stat; -} - -static struct spi_driver early_seeprom_driver __initdata = { - .driver = { - .name = "at25", - .owner = THIS_MODULE, - }, - .probe = early_seeprom_probe, -}; - -int __init spi_eeprom_read(int chipid, int address, - unsigned char *buf, int len) -{ - int ret; - struct read_param param = { - .chipid = chipid, - .address = address, - .buf = buf, - .len = len - }; - - read_param = ¶m; - ret = spi_register_driver(&early_seeprom_driver); - if (!ret) - spi_unregister_driver(&early_seeprom_driver); - return ret; -} |