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MIPS: Octeon: Add I2C platform device. 

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
To: linux-i2c@vger.kernel.org
To: ben-linux@fluff.org
To: khali@linux-fr.org
Cc: Rade Bozic <rade.bozic.ext@nsn.com>
Patchwork: http://patchwork.linux-mips.org/patch/847/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
David Daney 2010-01-07 13:23:41 -08:00 committed by Ralf Baechle
parent d38760ccdf
commit f41c3c1b3e
2 changed files with 77 additions and 0 deletions
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72
arch/mips/cavium-octeon/octeon-platform.c
View File

@ -159,6 +159,78 @@ static int __init octeon_rng_device_init(void)
}
device_initcall(octeon_rng_device_init);
#define OCTEON_I2C_IO_BASE 0x1180000001000ull
#define OCTEON_I2C_IO_UNIT_OFFSET 0x200
static struct octeon_i2c_data octeon_i2c_data[2];
static int __init octeon_i2c_device_init(void)
{
struct platform_device *pd;
int ret = 0;
int port, num_ports;
struct resource i2c_resources[] = {
{
.flags = IORESOURCE_MEM,
}, {
.flags = IORESOURCE_IRQ,
}
};
if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN52XX))
num_ports = 2;
else
num_ports = 1;
for (port = 0; port < num_ports; port++) {
octeon_i2c_data[port].sys_freq = octeon_get_clock_rate();
/*FIXME: should be examined. At the moment is set for 100Khz */
octeon_i2c_data[port].i2c_freq = 100000;
pd = platform_device_alloc("i2c-octeon", port);
if (!pd) {
ret = -ENOMEM;
goto out;
}
pd->dev.platform_data = octeon_i2c_data + port;
i2c_resources[0].start =
OCTEON_I2C_IO_BASE + (port * OCTEON_I2C_IO_UNIT_OFFSET);
i2c_resources[0].end = i2c_resources[0].start + 0x1f;
switch (port) {
case 0:
i2c_resources[1].start = OCTEON_IRQ_TWSI;
i2c_resources[1].end = OCTEON_IRQ_TWSI;
break;
case 1:
i2c_resources[1].start = OCTEON_IRQ_TWSI2;
i2c_resources[1].end = OCTEON_IRQ_TWSI2;
break;
default:
BUG();
}
ret = platform_device_add_resources(pd,
i2c_resources,
ARRAY_SIZE(i2c_resources));
if (ret)
goto fail;
ret = platform_device_add(pd);
if (ret)
goto fail;
}
return ret;
fail:
platform_device_put(pd);
out:
return ret;
}
device_initcall(octeon_i2c_device_init);
/* Octeon SMI/MDIO interface. */
static int __init octeon_mdiobus_device_init(void)
{

5
arch/mips/include/asm/octeon/octeon.h
View File

@ -213,6 +213,11 @@ struct octeon_cf_data {
int dma_engine; /* -1 for no DMA */
};
struct octeon_i2c_data {
unsigned int sys_freq;
unsigned int i2c_freq;
};
extern void octeon_write_lcd(const char *s);
extern void octeon_check_cpu_bist(void);
extern int octeon_get_boot_debug_flag(void);