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MIPS: TXx9: Make spi_eeprom.c more generic

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Helper routines in txx9/rbtx4938/spi_eeprom.c is not TX4938 specific.
Move it to txx9/generic/ directory and make it works with SPI bus
number other than 0.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

 create mode 100644 arch/mips/txx9/generic/spi_eeprom.c
 delete mode 100644 arch/mips/txx9/rbtx4938/spi_eeprom.c
This commit is contained in:
Atsushi Nemoto 2008-08-19 22:55:14 +09:00 committed by Ralf Baechle
parent e633237477
commit d75a40e90e
5 changed files with 41 additions and 20 deletions
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1
arch/mips/txx9/generic/Makefile
View File

@ -8,5 +8,6 @@ obj-$(CONFIG_SOC_TX3927) += setup_tx3927.o irq_tx3927.o
obj-$(CONFIG_SOC_TX4927) += mem_tx4927.o setup_tx4927.o irq_tx4927.o
obj-$(CONFIG_SOC_TX4938) += mem_tx4927.o setup_tx4938.o irq_tx4938.o
obj-$(CONFIG_TOSHIBA_FPCIB0) += smsc_fdc37m81x.o
obj-$(CONFIG_SPI) += spi_eeprom.o
EXTRA_CFLAGS += -Werror

28
arch/mips/txx9/rbtx4938/spi_eeprom.c → arch/mips/txx9/generic/spi_eeprom.c
View File

@ -18,29 +18,31 @@
#define AT250X0_PAGE_SIZE 8
/* register board information for at25 driver */
int __init spi_eeprom_register(int chipid)
int __init spi_eeprom_register(int busid, int chipid, int size)
{
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,
.bus_num = busid,
.chip_select = chipid,
.platform_data = &eeprom,
/* Mode 0: High-Active, Sample-Then-Shift */
};
struct spi_eeprom *eeprom;
eeprom = kzalloc(sizeof(*eeprom), GFP_KERNEL);
if (!eeprom)
return -ENOMEM;
strcpy(eeprom->name, "at250x0");
eeprom->byte_len = size;
eeprom->page_size = AT250X0_PAGE_SIZE;
eeprom->flags = EE_ADDR1;
info.platform_data = eeprom;
return spi_register_board_info(&info, 1);
}
/* simple temporary spi driver to provide early access to seeprom. */
static struct read_param {
int busid;
int chipid;
int address;
unsigned char *buf;
@ -57,7 +59,8 @@ static int __init early_seeprom_probe(struct spi_device *spi)
dev_info(&spi->dev, "spiclk %u KHz.\n",
(spi->max_speed_hz + 500) / 1000);
if (read_param->chipid != spi->chip_select)
if (read_param->busid != spi->master->bus_num ||
read_param->chipid != spi->chip_select)
return -ENODEV;
while (len > 0) {
/* spi_write_then_read can only work with small chunk */
@ -80,11 +83,12 @@ static struct spi_driver early_seeprom_driver __initdata = {
.probe = early_seeprom_probe,
};
int __init spi_eeprom_read(int chipid, int address,
int __init spi_eeprom_read(int busid, int chipid, int address,
unsigned char *buf, int len)
{
int ret;
struct read_param param = {
.busid = busid,
.chipid = chipid,
.address = address,
.buf = buf,

2
arch/mips/txx9/rbtx4938/Makefile
View File

@ -1,3 +1,3 @@
obj-y += prom.o setup.o irq.o spi_eeprom.o
obj-y += prom.o setup.o irq.o
EXTRA_CFLAGS += -Werror

11
arch/mips/txx9/rbtx4938/setup.c
View File

@ -111,6 +111,7 @@ static void __init rbtx4938_pci_setup(void)
#define SEEPROM2_CS 0 /* IOC */
#define SEEPROM3_CS 1 /* IOC */
#define SRTC_CS 2 /* IOC */
#define SPI_BUSNO 0
static int __init rbtx4938_ethaddr_init(void)
{
@ -120,7 +121,7 @@ static int __init rbtx4938_ethaddr_init(void)
int i;
/* 0-3: "MAC\0", 4-9:eth0, 10-15:eth1, 16:sum */
if (spi_eeprom_read(SEEPROM1_CS, 0, dat, sizeof(dat))) {
if (spi_eeprom_read(SPI_BUSNO, SEEPROM1_CS, 0, dat, sizeof(dat))) {
printk(KERN_ERR "seeprom: read error.\n");
return -ENODEV;
} else {
@ -287,9 +288,9 @@ static int __init rbtx4938_spi_init(void)
.mode = SPI_MODE_1 | SPI_CS_HIGH,
};
spi_register_board_info(&srtc_info, 1);
spi_eeprom_register(SEEPROM1_CS);
spi_eeprom_register(16 + SEEPROM2_CS);
spi_eeprom_register(16 + SEEPROM3_CS);
spi_eeprom_register(SPI_BUSNO, SEEPROM1_CS, 128);
spi_eeprom_register(SPI_BUSNO, 16 + SEEPROM2_CS, 128);
spi_eeprom_register(SPI_BUSNO, 16 + SEEPROM3_CS, 128);
gpio_request(16 + SRTC_CS, "rtc-rs5c348");
gpio_direction_output(16 + SRTC_CS, 0);
gpio_request(SEEPROM1_CS, "seeprom1");
@ -298,7 +299,7 @@ static int __init rbtx4938_spi_init(void)
gpio_direction_output(16 + SEEPROM2_CS, 1);
gpio_request(16 + SEEPROM3_CS, "seeprom3");
gpio_direction_output(16 + SEEPROM3_CS, 1);
tx4938_spi_init(0);
tx4938_spi_init(SPI_BUSNO);
return 0;
}

19
include/asm-mips/txx9/spi.h
View File

@ -13,7 +13,22 @@
#ifndef __ASM_TXX9_SPI_H
#define __ASM_TXX9_SPI_H
extern int spi_eeprom_register(int chipid);
extern int spi_eeprom_read(int chipid, int address, unsigned char *buf, int len);
#include <linux/errno.h>
#ifdef CONFIG_SPI
int spi_eeprom_register(int busid, int chipid, int size);
int spi_eeprom_read(int busid, int chipid,
int address, unsigned char *buf, int len);
#else
static inline int spi_eeprom_register(int busid, int chipid, int size)
{
return -ENODEV;
}
static inline int spi_eeprom_read(int busid, int chipid,
int address, unsigned char *buf, int len)
{
return -ENODEV;
}
#endif
#endif /* __ASM_TXX9_SPI_H */