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authorDavid Daney <ddaney@caviumnetworks.com>2010-01-07 13:23:41 -0800
committerRalf Baechle <ralf@linux-mips.org>2010-02-27 12:53:04 +0100
commitf41c3c1b3ed53440b37445712f8e1048a39d7001 (patch)
treec737d70385a32aea9de6a2d1e3b9a088c4bbe63f
parentd38760ccdf879a8648be53488227bf7fe597792d (diff)
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>
-rw-r--r--arch/mips/cavium-octeon/octeon-platform.c72
-rw-r--r--arch/mips/include/asm/octeon/octeon.h5
2 files changed, 77 insertions, 0 deletions
diff --git a/arch/mips/cavium-octeon/octeon-platform.c b/arch/mips/cavium-octeon/octeon-platform.c
index cfdb4c2ac5c..784c1c87401 100644
--- a/arch/mips/cavium-octeon/octeon-platform.c
+++ b/arch/mips/cavium-octeon/octeon-platform.c
@@ -159,6 +159,78 @@ out:
}
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)
{
diff --git a/arch/mips/include/asm/octeon/octeon.h b/arch/mips/include/asm/octeon/octeon.h
index 4d0a8c61fc3..ca6214b5ccb 100644
--- a/arch/mips/include/asm/octeon/octeon.h
+++ b/arch/mips/include/asm/octeon/octeon.h
@@ -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);