Signed-off-by: David Daney <ddaney@xxxxxxxxxxxxxxxxxx>
CC: Rade Bozic <rade.bozic.ext@xxxxxxx>
---
This supersedes the original '[PATCH 1/3] MIPS: Octeon: Add I2C
platform driver.' and corrects the resource end value as noted by
Sergei Shtylyov.
arch/mips/cavium-octeon/octeon-platform.c | 72 +++++++++++++++++++++++++++++
arch/mips/include/asm/octeon/octeon.h | 5 ++
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 20698a6..b4a0b5f 100644
--- a/arch/mips/cavium-octeon/octeon-platform.c
+++ b/arch/mips/cavium-octeon/octeon-platform.c
@@ -165,6 +165,78 @@ 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 705fef2..a0cf129 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_uart(void);
--
1.6.0.6
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