[PATCH 3/7] mfd: syscon: Decouple syscon interface from platform devices

[Andrey Smirnov]

On Thu, Jul 14, 2016 at 10:59 PM, Sascha Hauer <s.hauer at pengutronix.de> wrote:
> On Wed, Jul 13, 2016 at 11:11:01PM -0700, Andrey Smirnov wrote:
>> Follow Linux Kernel change introduced in
>> bdb0066df96e74a4002125467ebe459feff1ebef and avoid device/driver model
>> for DT-based platforms. See the original kernel commit for the rationale.
>>
>> Also make syscon_base_lookup_by_pdevname() behave the same way as its
>> kernel counterpart in the case whern "property" argument is NULL.
>>
>> Signed-off-by: Andrey Smirnov <andrew.smirnov at gmail.com>
>> ---
>>  drivers/mfd/syscon.c | 79 ++++++++++++++++++++++++++++++++++++++++------------
>>  1 file changed, 61 insertions(+), 18 deletions(-)
>>
>> diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
>> index ac46122..5fd22dd 100644
>> --- a/drivers/mfd/syscon.c
>> +++ b/drivers/mfd/syscon.c
>> @@ -17,15 +17,68 @@
>>  #include <driver.h>
>>  #include <malloc.h>
>>  #include <xfuncs.h>
>> -
>> +#include <of_address.h>
>>  #include <linux/err.h>
>>
>>  #include <mfd/syscon.h>
>>
>> +static LIST_HEAD(syscon_list);
>> +
>>  struct syscon {
>> +     struct device_node *np;
>>       void __iomem *base;
>> +     struct list_head list;
>>  };
>>
>> +static struct syscon *of_syscon_register(struct device_node *np)
>> +{
>> +     int ret;
>> +     struct syscon *syscon;
>> +     struct resource res;
>> +
>> +     if (!of_device_is_compatible(np, "syscon"))
>> +             return ERR_PTR(-EINVAL);
>> +
>> +     syscon = xzalloc(sizeof(*syscon));
>> +
>> +     if (of_address_to_resource(np, 0, &res)) {
>> +             ret = -ENOMEM;
>> +             goto err_map;
>> +     }
>> +
>> +     syscon->base = IOMEM(res.start);
>> +     syscon->np   = np;
>> +
>> +     list_add_tail(&syscon->list, &syscon_list);
>> +
>> +     return syscon;
>> +
>> +err_map:
>> +     kfree(syscon);
>> +     return ERR_PTR(ret);
>> +}
>> +
>> +void __iomem *syscon_node_to_base(struct device_node *np)
>
> This should either be static or the prototype added to include/
>

Oops, missed this one. It should be static. Will fix in v2.

Thanks,
Andrey