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[PATCH 1/3] MIPS: Octeon: Add I2C platform device.

To: linux-mips@linux-mips.org, ralf@linux-mips.org, linux-i2c@vger.kernel.org, ben-linux@fluff.org, khali@linux-fr.org
Subject: [PATCH 1/3] MIPS: Octeon: Add I2C platform device.
From: David Daney <ddaney@caviumnetworks.com>
Date: Thu, 7 Jan 2010 13:23:41 -0800
Cc: rade.bozic.ext@nsn.com, David Daney <ddaney@caviumnetworks.com>
In-reply-to: <4B464A37.7020300@caviumnetworks.com>
References: <4B464A37.7020300@caviumnetworks.com>
Sender: linux-mips-bounce@linux-mips.org
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
CC: Rade Bozic <rade.bozic.ext@nsn.com>
---

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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