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Commit 6574e001 authored by Martin Michlmayr's avatar Martin Michlmayr Committed by Nicolas Pitre
Browse files

[ARM] Kirkwood: Hook up I2C 



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

Signed-off-by: default avatarMartin Michlmayr <tbm@cyrius.com>
Signed-off-by: default avatarNicolas Pitre <nico@marvell.com>
parent 569106c7

arch/arm/mach-kirkwood/common.c

+40 −0
Original line number Diff line number Diff line
@@ -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

 ****************************************************************************/

arch/arm/mach-kirkwood/common.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

arch/arm/mach-kirkwood/include/mach/kirkwood.h

+1 −0
Original line number Diff line number Diff line
@@ -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)