summaryrefslogtreecommitdiffstats
path: root/arch/arm
diff options
context:
space:
mode:
authorMartin Michlmayr <tbm@cyrius.com>2009-03-23 19:13:21 +0100
committerNicolas Pitre <nico@cam.org>2009-03-23 14:42:00 -0400
commit6574e001b4bc616022ee706a338fbbac26a9cedd (patch)
treea6ae13e971229206bfb940d501026d08d90f6650 /arch/arm
parent569106c70e49ad67c69fa7d43a2a5218e63a4619 (diff)
downloadop-kernel-dev-6574e001b4bc616022ee706a338fbbac26a9cedd.zip
op-kernel-dev-6574e001b4bc616022ee706a338fbbac26a9cedd.tar.gz
[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')
-rw-r--r--arch/arm/mach-kirkwood/common.c40
-rw-r--r--arch/arm/mach-kirkwood/common.h1
-rw-r--r--arch/arm/mach-kirkwood/include/mach/kirkwood.h1
3 files changed, 42 insertions, 0 deletions
diff --git a/arch/arm/mach-kirkwood/common.c b/arch/arm/mach-kirkwood/common.c
index 9f01255..19b03f6 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 9e52826..c66a250 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 d3db30f..38c9868 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)
OpenPOWER on IntegriCloud