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authorTimur Tabi <timur@freescale.com>2008-06-02 22:09:35 +0200
committerKumar Gala <galak@kernel.crashing.org>2008-06-03 06:57:07 +0200
commite026892c85571e12f11abffde5a90bcc704d663e (patch)
tree14c70174ef2d2c9ef8f57a84be0d9b7d54521f32 /arch/powerpc/sysdev/fsl_soc.c
parent[POWERPC] 40x/Book-E: Save/restore volatile exception registers (diff)
downloadlinux-e026892c85571e12f11abffde5a90bcc704d663e.tar.xz
linux-e026892c85571e12f11abffde5a90bcc704d663e.zip
[POWERPC] fsl: Update fsl_soc to use cell-index property of I2C nodes
Currently, fsl_i2c_of_init() uses the order of the I2C adapter nodes in the device tree to enumerate the I2C adapters. Instead, let's check for the cell-index property and use it if it exists. This is handy for device drivers that need to identify the I2C adapters by specific numbers. The Freescale MPC8610 ASoC V2 sound drivers are an example. Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/sysdev/fsl_soc.c')
-rw-r--r--arch/powerpc/sysdev/fsl_soc.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c
index 167523e9e41c..14616d5d12d5 100644
--- a/arch/powerpc/sysdev/fsl_soc.c
+++ b/arch/powerpc/sysdev/fsl_soc.c
@@ -496,6 +496,8 @@ static int __init fsl_i2c_of_init(void)
struct resource r[2];
struct fsl_i2c_platform_data i2c_data;
const unsigned char *flags = NULL;
+ int idx;
+ const u32 *iprop;
memset(&r, 0, sizeof(r));
memset(&i2c_data, 0, sizeof(i2c_data));
@@ -506,7 +508,10 @@ static int __init fsl_i2c_of_init(void)
of_irq_to_resource(np, 0, &r[1]);
- i2c_dev = platform_device_register_simple("fsl-i2c", i, r, 2);
+ iprop = of_get_property(np, "cell-index", NULL);
+ idx = iprop ? *iprop : i;
+
+ i2c_dev = platform_device_register_simple("fsl-i2c", idx, r, 2);
if (IS_ERR(i2c_dev)) {
ret = PTR_ERR(i2c_dev);
goto err;
@@ -528,7 +533,8 @@ static int __init fsl_i2c_of_init(void)
if (ret)
goto unreg;
- of_register_i2c_devices(np, i++);
+ of_register_i2c_devices(np, idx);
+ i++;
}
return 0;