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| author | Tzachi Perelstein <tzachi@marvell.com> | 2007-11-12 19:38:51 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-01-26 15:03:59 +0000 |
| commit | a0832798c05241f15e793805b6024919c07b8292 (patch) | |
| tree | 32651dbe7acda8a17efe4f44e75547e6266bb49b /drivers/i2c/busses/i2c-mv64xxx.c | |
| parent | 60ce1c20068ec2c138cdf9e5cbe583cc60883c62 (diff) | |
| download | lwn-a0832798c05241f15e793805b6024919c07b8292.tar.gz lwn-a0832798c05241f15e793805b6024919c07b8292.zip | |
[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>
Diffstat (limited to 'drivers/i2c/busses/i2c-mv64xxx.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-mv64xxx.c | 31 |
1 files changed, 17 insertions, 14 deletions
diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c index bb7bf68a7fb6..cdd1ef99fcff 100644 --- a/drivers/i2c/busses/i2c-mv64xxx.c +++ b/drivers/i2c/busses/i2c-mv64xxx.c @@ -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; |