MIPS: Netlogic: Platform changes for XLR/XLS I2C

Add platform code for XLR/XLS I2C controller and devices. Add
devices on the I2C bus on the XLR/XLS developement boards.

Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3757/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 51 insertions, 0 deletions

diff --git a/arch/mips/netlogic/xlr/platform.c b/arch/mips/netlogic/xlr/platform.c
index cb0ab63089db..71b44d82621d 100644
--- a/arch/mips/netlogic/xlr/platform.c
+++ b/arch/mips/netlogic/xlr/platform.c
@@ -14,6 +14,7 @@
 #include <linux/resource.h>
 #include <linux/serial_8250.h>
 #include <linux/serial_reg.h>
+#include <linux/i2c.h>
 
 #include <asm/netlogic/haldefs.h>
 #include <asm/netlogic/xlr/iomap.h>
@@ -186,3 +187,53 @@ int xls_platform_usb_init(void)
 
 arch_initcall(xls_platform_usb_init);
 #endif
+
+#ifdef CONFIG_I2C
+static struct i2c_board_info nlm_i2c_board_info1[] __initdata = {
+        /* All XLR boards have this RTC and Max6657 Temp Chip */
+        [0] = {
+                .type   = "ds1374",
+                .addr   = 0x68
+        },
+        [1] = {
+                .type   = "lm90",
+                .addr   = 0x4c
+        },
+};
+
+static struct resource i2c_resources[] = {
+        [0] = {
+                .start  = 0,    /* filled at init */
+                .end    = 0,
+                .flags  = IORESOURCE_MEM,
+        },
+};
+
+static struct platform_device nlm_xlr_i2c_1 = {
+        .name           = "xlr-i2cbus",
+        .id             = 1,
+        .num_resources  = 1,
+        .resource       = i2c_resources,
+};
+
+static int __init nlm_i2c_init(void)
+{
+        int err = 0;
+        unsigned int offset;
+
+        /* I2C bus 0 does not have any useful devices, configure only bus 1 */
+        offset = NETLOGIC_IO_I2C_1_OFFSET;
+        nlm_xlr_i2c_1.resource[0].start = CPHYSADDR(nlm_mmio_base(offset));
+        nlm_xlr_i2c_1.resource[0].end = nlm_xlr_i2c_1.resource[0].start + 0xfff;
+
+        platform_device_register(&nlm_xlr_i2c_1);
+
+        err = i2c_register_board_info(1, nlm_i2c_board_info1,
+                                ARRAY_SIZE(nlm_i2c_board_info1));
+        if (err < 0)
+                pr_err("nlm-i2c: cannot register board I2C devices\n");
+        return err;
+}
+
+arch_initcall(nlm_i2c_init);
+#endif