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Message-ID: <db6cdd06-c895-566c-0514-fe56a362d215@roeck-us.net>
Date: Mon, 7 Jan 2019 06:04:10 -0800
From: Guenter Roeck <linux@...ck-us.net>
To: Xiaoting Liu <xiaoting.liu@...-semitech.com>, 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
Subject: Re: [PATCH v2 1/4] pmbus: associate PMBUS_SKIP_STATUS_CHECK with
driver_data
On 1/7/19 2:57 AM, Xiaoting Liu wrote:
> 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;
> +
Please no empty line between assignments and checking its results.
> + 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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>
I think I mentioned that before. This legalese makes it all but impossible
for me to apply your patches.
Guenter
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