hwmon: (pmbus) associate PMBUS_SKIP_STATUS_CHECK with driver data

Current code compares device name with name in i2c_device_id to decide
whether PMBUS_SKIP_STATUS_CHECK should be set in pmbus_platform_data,
which makes adding new devices with PMBUS_SKIP_STATUS_CHECK should also
modify code in pmbus_probe().

This patch adds pmbus_device_info to save pages and flags. Its pointer
is put in driver_data of i2c_device_id, which makes adding new device
more straightforward.
Signed-off-by: Shunyong Yang <shunyong.yang@hxt-semitech.com>
Signed-off-by: Xiaoting Liu <xiaoting.liu@hxt-semitech.com>
[groeck: Use designated structure initializers to improve readability]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/pmbus/pmbus.c

@@ -28,6 +28,11 @@
 #include <linux/pmbus.h>
 #include "pmbus.h"
 
+struct pmbus_device_info {
+	int pages;
+	u32 flags;
+};
+
 /*
  * Find sensor groups and status registers on each page.
  */
@@ -172,13 +177,14 @@ static int pmbus_probe(struct i2c_client *client,
 	struct pmbus_driver_info *info;
 	struct pmbus_platform_data *pdata = NULL;
 	struct device *dev = &client->dev;
+	struct pmbus_device_info *device_info;
 
 	info = devm_kzalloc(dev, sizeof(struct pmbus_driver_info), GFP_KERNEL);
 	if (!info)
 		return -ENOMEM;
 
-	if (!strcmp(id->name, "dps460") || !strcmp(id->name, "dps800") ||
-	    !strcmp(id->name, "sgd009")) {
+	device_info = (struct pmbus_device_info *)id->driver_data;
+	if (device_info->flags & PMBUS_SKIP_STATUS_CHECK) {
 		pdata = devm_kzalloc(dev, sizeof(struct pmbus_platform_data),
 				     GFP_KERNEL);
 		if (!pdata)
@@ -187,36 +193,49 @@ static int pmbus_probe(struct i2c_client *client,
 		pdata->flags = PMBUS_SKIP_STATUS_CHECK;
 	}
 
-	info->pages = id->driver_data;
+	info->pages = device_info->pages;
 	info->identify = pmbus_identify;
 	dev->platform_data = pdata;
 
 	return pmbus_do_probe(client, id, info);
 }
 
+static const struct pmbus_device_info pmbus_info_one = {
+	.pages = 1,
+	.flags = 0
+};
+static const struct pmbus_device_info pmbus_info_zero = {
+	.pages = 0,
+	.flags = 0
+};
+static const struct pmbus_device_info pmbus_info_one_skip = {
+	.pages = 1,
+	.flags = PMBUS_SKIP_STATUS_CHECK
+};
+
 /*
  * Use driver_data to set the number of pages supported by the chip.
  */
 static const struct i2c_device_id pmbus_id[] = {
-	{"adp4000", 1},
-	{"bmr453", 1},
-	{"bmr454", 1},
-	{"dps460", 1},
-	{"dps800", 1},
-	{"mdt040", 1},
-	{"ncp4200", 1},
-	{"ncp4208", 1},
-	{"pdt003", 1},
-	{"pdt006", 1},
-	{"pdt012", 1},
-	{"pmbus", 0},
-	{"sgd009", 1},
-	{"tps40400", 1},
-	{"tps544b20", 1},
-	{"tps544b25", 1},
-	{"tps544c20", 1},
-	{"tps544c25", 1},
-	{"udt020", 1},
+	{"adp4000", (kernel_ulong_t)&pmbus_info_one},
+	{"bmr453", (kernel_ulong_t)&pmbus_info_one},
+	{"bmr454", (kernel_ulong_t)&pmbus_info_one},
+	{"dps460", (kernel_ulong_t)&pmbus_info_one_skip},
+	{"dps800", (kernel_ulong_t)&pmbus_info_one_skip},
+	{"mdt040", (kernel_ulong_t)&pmbus_info_one},
+	{"ncp4200", (kernel_ulong_t)&pmbus_info_one},
+	{"ncp4208", (kernel_ulong_t)&pmbus_info_one},
+	{"pdt003", (kernel_ulong_t)&pmbus_info_one},
+	{"pdt006", (kernel_ulong_t)&pmbus_info_one},
+	{"pdt012", (kernel_ulong_t)&pmbus_info_one},
+	{"pmbus", (kernel_ulong_t)&pmbus_info_zero},
+	{"sgd009", (kernel_ulong_t)&pmbus_info_one_skip},
+	{"tps40400", (kernel_ulong_t)&pmbus_info_one},
+	{"tps544b20", (kernel_ulong_t)&pmbus_info_one},
+	{"tps544b25", (kernel_ulong_t)&pmbus_info_one},
+	{"tps544c20", (kernel_ulong_t)&pmbus_info_one},
+	{"tps544c25", (kernel_ulong_t)&pmbus_info_one},
+	{"udt020", (kernel_ulong_t)&pmbus_info_one},
 	{}
 };