lkml.org 
[lkml]   [2015]   [Jan]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2 1/2] Input: touchscreen-iproc: Add Broadcom iProc touchscreen driver
On 15-01-14 05:08 PM, Florian Fainelli wrote:
> On 19/12/14 15:03, Jonathan Richardson wrote:
>> On 14-12-19 02:26 PM, Joe Perches wrote:
>>> On Fri, 2014-12-19 at 14:17 -0800, Jonathan Richardson wrote:
>>>> Add initial version of the Broadcom touchscreen driver.
>>>
>>> more trivia:
>>>
>>>> diff --git a/drivers/input/touchscreen/bcm_iproc_tsc.c b/drivers/input/touchscreen/bcm_iproc_tsc.c
>>> []
>>>> +static int get_tsc_config(struct device_node *np, struct iproc_ts_priv *priv)
>>>> +{
>>>> + u32 val;
>>> []
>>>> + if (of_property_read_u32(np, "debounce_timeout", &val) >= 0) {
>>>> + if (val < 0 || val > 255) {
>>>> + dev_err(dev, "debounce_timeout must be [0-255]\n");
>>>> + return -EINVAL;
>>>> + }
>>>> + priv->cfg_params.debounce_timeout = val;
>
> BTW, common practice for DT properties is to use a dash instead of an
> underscore for multi-worded properties.

ts-rotation is done that way already so I'll change the others to be
consistent. Thanks.

>
>>>
>>> Doesn't the compiler generate a warning message
>>> about an impossible "unsigned < 0" test for all
>>> of these "val < 0" uses?
>>>
>>
>> Actually no it doesn't. The gcc output shows that neither -Wtype-limits
>> nor -Wextra are used to compile that file. I assume this is because
>> there would be just too many warnings.
>>
>>
>>>> + }
>>>> +
>>>> + if (of_property_read_u32(np, "settling_timeout", &val) >= 0) {
>>>> + if (val < 0 || val > 11) {
>>> []
>>>> + if (of_property_read_u32(np, "touch_timeout", &val) >= 0) {
>>>> + if (val < 0 || val > 255) {
>>> []
>>>> + if (of_property_read_u32(np, "average_data", &val) >= 0) {
>>>> + if (val < 0 || val > 8) {
>>> []
>>>> + if (of_property_read_u32(np, "fifo_threshold", &val) >= 0) {
>>>> + if (val < 0 || val > 31) {
>>>
>>>
>>
>>
>> _______________________________________________
>> linux-arm-kernel mailing list
>> linux-arm-kernel@lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>>
>
>



\
 
 \ /
  Last update: 2015-01-15 20:41    [W:0.045 / U:0.316 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site