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[ARM] Kirkwood: Hook up I2C

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Hook up I2C on Marvell Kirkwood.  Tested on a QNAP TS-219 which has
RTC connected through I2C.

Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
This commit is contained in:
Martin Michlmayr 2009-03-23 19:13:21 +01:00 committed by Nicolas Pitre
parent 569106c70e
commit 6574e001b4
3 changed files with 42 additions and 0 deletions
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40
arch/arm/mach-kirkwood/common.c
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@ -14,6 +14,7 @@
#include <linux/serial_8250.h>
#include <linux/mbus.h>
#include <linux/mv643xx_eth.h>
#include <linux/mv643xx_i2c.h>
#include <linux/ata_platform.h>
#include <linux/spi/orion_spi.h>
#include <net/dsa.h>
@ -370,6 +371,45 @@ void __init kirkwood_spi_init()
}
/*****************************************************************************
* I2C
****************************************************************************/
static struct mv64xxx_i2c_pdata kirkwood_i2c_pdata = {
.freq_m = 8, /* assumes 166 MHz TCLK */
.freq_n = 3,
.timeout = 1000, /* Default timeout of 1 second */
};
static struct resource kirkwood_i2c_resources[] = {
{
.name = "i2c",
.start = I2C_PHYS_BASE,
.end = I2C_PHYS_BASE + 0x1f,
.flags = IORESOURCE_MEM,
}, {
.name = "i2c",
.start = IRQ_KIRKWOOD_TWSI,
.end = IRQ_KIRKWOOD_TWSI,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device kirkwood_i2c = {
.name = MV64XXX_I2C_CTLR_NAME,
.id = 0,
.num_resources = ARRAY_SIZE(kirkwood_i2c_resources),
.resource = kirkwood_i2c_resources,
.dev = {
.platform_data = &kirkwood_i2c_pdata,
},
};
void __init kirkwood_i2c_init(void)
{
platform_device_register(&kirkwood_i2c);
}
/*****************************************************************************
* UART0
****************************************************************************/

1
arch/arm/mach-kirkwood/common.h
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@ -37,6 +37,7 @@ void kirkwood_pcie_init(void);
void kirkwood_sata_init(struct mv_sata_platform_data *sata_data);
void kirkwood_sdio_init(struct mvsdio_platform_data *mvsdio_data);
void kirkwood_spi_init(void);
void kirkwood_i2c_init(void);
void kirkwood_uart0_init(void);
void kirkwood_uart1_init(void);

1
arch/arm/mach-kirkwood/include/mach/kirkwood.h
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@ -93,6 +93,7 @@
#define DEVICE_ID (DEV_BUS_VIRT_BASE | 0x0034)
#define RTC_PHYS_BASE (DEV_BUS_PHYS_BASE | 0x0300)
#define SPI_PHYS_BASE (DEV_BUS_PHYS_BASE | 0x0600)
#define I2C_PHYS_BASE (DEV_BUS_PHYS_BASE | 0x1000)
#define UART0_PHYS_BASE (DEV_BUS_PHYS_BASE | 0x2000)
#define UART0_VIRT_BASE (DEV_BUS_VIRT_BASE | 0x2000)
#define UART1_PHYS_BASE (DEV_BUS_PHYS_BASE | 0x2100)