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[I2C] Split mv643xx I2C platform support 

The motivation for this change is to allow other chips, like the
Marvell Orion ARM SoC family, to use the existing i2c-mv64xxx driver.

Signed-off-by: Tzachi Perelstein <tzachi@marvell.com>
Acked-by: Nicolas Pitre <nico@marvell.com>
Acked-by: Dale Farnsworth <dale@farnsworth.org>
Acked-by: Mark A. Greer <mgreer@mvista.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Tzachi Perelstein 2007-11-12 19:38:51 +02:00 committed by Russell King
parent 60ce1c2006
commit a0832798c0
4 changed files with 42 additions and 24 deletions
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2
drivers/i2c/busses/Kconfig
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@ -648,7 +648,7 @@ config I2C_PCA_ISA
config I2C_MV64XXX
tristate "Marvell mv64xxx I2C Controller"
depends on MV64X60 && EXPERIMENTAL
depends on (MV64X60 || ARCH_ORION) && EXPERIMENTAL
help
If you say yes to this option, support will be included for the
built-in I2C interface on the Marvell 64xxx line of host bridges.

31
drivers/i2c/busses/i2c-mv64xxx.c
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@ -1,6 +1,6 @@
/*
* Driver for the i2c controller on the Marvell line of host bridges for MIPS
* and PPC (e.g, gt642[46]0, mv643[46]0, mv644[46]0).
* Driver for the i2c controller on the Marvell line of host bridges
* (e.g, gt642[46]0, mv643[46]0, mv644[46]0, and Orion SoC family).
*
* Author: Mark A. Greer <mgreer@mvista.com>
*
@ -14,7 +14,7 @@
#include <linux/spinlock.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/mv643xx.h>
#include <linux/mv643xx_i2c.h>
#include <linux/platform_device.h>
#include <asm/io.h>
@ -86,6 +86,7 @@ struct mv64xxx_i2c_data {
u32 cntl_bits;
void __iomem *reg_base;
u32 reg_base_p;
u32 reg_size;
u32 addr1;
u32 addr2;
u32 bytes_left;
@ -463,17 +464,20 @@ static int __devinit
mv64xxx_i2c_map_regs(struct platform_device *pd,
struct mv64xxx_i2c_data *drv_data)
{
struct resource *r;
int size;
struct resource *r = platform_get_resource(pd, IORESOURCE_MEM, 0);
if ((r = platform_get_resource(pd, IORESOURCE_MEM, 0)) &&
request_mem_region(r->start, MV64XXX_I2C_REG_BLOCK_SIZE,
drv_data->adapter.name)) {
if (!r)
return -ENODEV;
drv_data->reg_base = ioremap(r->start,
MV64XXX_I2C_REG_BLOCK_SIZE);
drv_data->reg_base_p = r->start;
} else
return -ENOMEM;
size = r->end - r->start + 1;
if (!request_mem_region(r->start, size, drv_data->adapter.name))
return -EBUSY;
drv_data->reg_base = ioremap(r->start, size);
drv_data->reg_base_p = r->start;
drv_data->reg_size = size;
return 0;
}
@ -483,8 +487,7 @@ mv64xxx_i2c_unmap_regs(struct mv64xxx_i2c_data *drv_data)
{
if (drv_data->reg_base) {
iounmap(drv_data->reg_base);
release_mem_region(drv_data->reg_base_p,
MV64XXX_I2C_REG_BLOCK_SIZE);
release_mem_region(drv_data->reg_base_p, drv_data->reg_size);
}
drv_data->reg_base = NULL;

10
include/linux/mv643xx.h
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@ -15,6 +15,7 @@
#include <asm/types.h>
#include <linux/mv643xx_eth.h>
#include <linux/mv643xx_i2c.h>
/****************************************/
/* Processor Address Space */
@ -863,7 +864,6 @@
/* I2C Registers */
/****************************************/
#define MV64XXX_I2C_CTLR_NAME "mv64xxx_i2c"
#define MV64XXX_I2C_OFFSET 0xc000
#define MV64XXX_I2C_REG_BLOCK_SIZE 0x0020
@ -968,14 +968,6 @@ struct mpsc_pdata {
u32 brg_clk_freq;
};
/* i2c Platform Device, Driver Data */
struct mv64xxx_i2c_pdata {
u32 freq_m;
u32 freq_n;
u32 timeout; /* In milliseconds */
u32 retries;
};
/* Watchdog Platform Device, Driver Data */
#define MV64x60_WDT_NAME "mv64x60_wdt"

23
include/linux/mv643xx_i2c.h Normal file
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@ -0,0 +1,23 @@
/*
* 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.
*/
#ifndef _MV64XXX_I2C_H_
#define _MV64XXX_I2C_H_
#include <linux/types.h>
#define MV64XXX_I2C_CTLR_NAME "mv64xxx_i2c"
/* i2c Platform Device, Driver Data */
struct mv64xxx_i2c_pdata {
u32 freq_m;
u32 freq_n;
u32 timeout; /* In milliseconds */
u32 retries;
};
#endif /*_MV64XXX_I2C_H_*/