Date:   Mon, 7 Jan 2019 18:57:42 +0800
From:   Xiaoting Liu <xiaoting.liu@...-semitech.com>
To:     <linux@...ck-us.net>, <jdelvare@...e.com>
CC:     <openbmc@...ts.ozlabs.org>, <linux-hwmon@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <shunyong.yang@...-semitech.com>,
        <dongsheng.wang@...-semitech.com>,
        Xiaoting Liu <xiaoting.liu@...-semitech.com>
Subject: [PATCH v2 1/4] 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@...-semitech.com>
Signed-off-by: Xiaoting Liu <xiaoting.liu@...-semitech.com>
---
v2:
  Move struct pmbus_device_info definition location from pmbus.h to pmbus.c.
  Change struct name from default_pmbus_info to pmbus_info_one.
  Change struct name from pmbus_info to pmbus_info_zero.
  Replace struct name dps460_pmbus_info and sgd009_pmbus_info with
  pmbus_info_one_skip.
---
 drivers/hwmon/pmbus/pmbus.c | 55 +++++++++++++++++++++++++++------------------
 1 file changed, 33 insertions(+), 22 deletions(-)

diff --git a/drivers/hwmon/pmbus/pmbus.c b/drivers/hwmon/pmbus/pmbus.c
index 7688dab32f6e..e38dd97cc49a 100644
--- a/drivers/hwmon/pmbus/pmbus.c
+++ b/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 +177,15 @@ 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 +194,40 @@ 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 = {1, 0};
+static const struct pmbus_device_info pmbus_info_zero = {0, 0};
+static const struct pmbus_device_info pmbus_info_one_skip = {
+                               1, 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},
        {}
 };

--
1.8.3.1




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