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| author | Martin Michlmayr <tbm@cyrius.com> | 2009-03-23 19:13:21 +0100 |
|---|---|---|
| committer | Nicolas Pitre <nico@cam.org> | 2009-03-23 14:42:00 -0400 |
| commit | 6574e001b4bc616022ee706a338fbbac26a9cedd (patch) | |
| tree | a6ae13e971229206bfb940d501026d08d90f6650 /arch/arm/mach-kirkwood | |
| parent | 569106c70e49ad67c69fa7d43a2a5218e63a4619 (diff) | |
| download | lwn-6574e001b4bc616022ee706a338fbbac26a9cedd.tar.gz lwn-6574e001b4bc616022ee706a338fbbac26a9cedd.zip | |
[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: Martin Michlmayr <tbm@cyrius.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Diffstat (limited to 'arch/arm/mach-kirkwood')
| -rw-r--r-- | arch/arm/mach-kirkwood/common.c | 40 | ||||
| -rw-r--r-- | arch/arm/mach-kirkwood/common.h | 1 | ||||
| -rw-r--r-- | arch/arm/mach-kirkwood/include/mach/kirkwood.h | 1 |
3 files changed, 42 insertions, 0 deletions
diff --git a/arch/arm/mach-kirkwood/common.c b/arch/arm/mach-kirkwood/common.c index 9f012551794d..19b03f62c3f4 100644 --- a/arch/arm/mach-kirkwood/common.c +++ b/arch/arm/mach-kirkwood/common.c @@ -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> @@ -371,6 +372,45 @@ 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 ****************************************************************************/ static struct plat_serial8250_port kirkwood_uart0_data[] = { diff --git a/arch/arm/mach-kirkwood/common.h b/arch/arm/mach-kirkwood/common.h index 9e5282684d58..c66a25066cea 100644 --- a/arch/arm/mach-kirkwood/common.h +++ b/arch/arm/mach-kirkwood/common.h @@ -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); diff --git a/arch/arm/mach-kirkwood/include/mach/kirkwood.h b/arch/arm/mach-kirkwood/include/mach/kirkwood.h index d3db30fe763b..38c986853590 100644 --- a/arch/arm/mach-kirkwood/include/mach/kirkwood.h +++ b/arch/arm/mach-kirkwood/include/mach/kirkwood.h @@ -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) |