From: Matej Kenda <matej.kenda@hermes-softlab.com>
Date: Mon, 5 Mar 2007 12:06:40 +0000 (+0100)
Subject: [ARM] 4246/1: i2c-pxa: add adapter class to platform specific data
X-Git-Tag: v2.6.22-rc1~1009^2~1^10~1
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a79220b7633b3926a9bd3527bdac3f04dbe6845c;p=linux-2.6

[ARM] 4246/1: i2c-pxa: add adapter class to platform specific data

Reposted patch for kernel 2.6.21-rc2.

The driver i2c-pxa doesn't set the class member in i2c_adapter, which
is used to register the I2C adapter. The hwmon (sensors) drivers (e.g.
adm1021) that are connected to a i2c-pxa adapter don't attach because
they expect that the adapter supports class I2C_CLASS_HWMON.

This patch adds functionality to allow platforms to set the class and
pass it as platform_data to the i2c-pxa driver. Sample usage in
platform code:

static struct i2c_pxa_platform_data my_i2c_platform_data = {
	.class = I2C_CLASS_HWMON
};

static void __init my_platform_init(void)
{
	(void) platform_add_devices(devices, ARRAY_SIZE(devices));

	pxa_set_i2c_info(&my_i2c_platform_data);
}

Signed-off-by: Matej Kenda <matej.kenda@hermes-softlab.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index 14e83d0aac..11c7477a0f 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -839,9 +839,7 @@ static int i2c_pxa_probe(struct platform_device *dev)
 {
 	struct pxa_i2c *i2c = &i2c_pxa;
 	struct resource *res;
-#ifdef CONFIG_I2C_PXA_SLAVE
 	struct i2c_pxa_platform_data *plat = dev->dev.platform_data;
-#endif
 	int ret;
 	int irq;
 
@@ -911,6 +909,10 @@ static int i2c_pxa_probe(struct platform_device *dev)
 	i2c->adap.algo_data = i2c;
 	i2c->adap.dev.parent = &dev->dev;
 
+	if (plat) {
+		i2c->adap.class = plat->class;
+	}
+
 	ret = i2c_add_adapter(&i2c->adap);
 	if (ret < 0) {
 		printk(KERN_INFO "I2C: Failed to add bus\n");
diff --git a/include/asm-arm/arch-pxa/i2c.h b/include/asm-arm/arch-pxa/i2c.h
index 46ec224397..e404b233d8 100644
--- a/include/asm-arm/arch-pxa/i2c.h
+++ b/include/asm-arm/arch-pxa/i2c.h
@@ -64,6 +64,7 @@ struct i2c_slave_client;
 struct i2c_pxa_platform_data {
 	unsigned int		slave_addr;
 	struct i2c_slave_client	*slave;
+	unsigned int		class;
 };
 
 extern void pxa_set_i2c_info(struct i2c_pxa_platform_data *info);