linux-kernel - Re: [PATCHv2 1/7] input/cma3000_d0x: Support devices without pdata

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Date:	Tue, 18 Oct 2011 14:58:33 +0200
From:	Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
To:	Jonathan Cameron <jic23@....ac.uk>
Cc:	dmitry.torokhov@...il.com, sameo@...ux.intel.com,
	peter.ujfalusi@...com, aghayal@...eaurora.org, david@...deman.nu,
	Shubhrajyoti@...com, saaguirre@...com, hemanthv@...com,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv2 1/7] input/cma3000_d0x: Support devices without pdata

Hello Jonathan

I think I am going to do it like ads1015.c. I will check for the
pdata, then for the dt info (if it is there) and finally go for the
default, if all fails. What do you think? Shall I fix it in cma3000
and cmr3000?

 Thanks again

On Tue, Oct 18, 2011 at 14:53, Jonathan Cameron <jic23@....ac.uk> wrote:
> On 10/18/11 13:06, Ricardo Ribalda Delgado wrote:
>> Architectures based on device-tree does not have platform data
>> associated to the spi/i2c devices.
>> This patch allows those architectures to use the cma3000 driver with
>> a default configuration.
> Fine except for this description. Looks to be a perfectly reasonable
> way of specifying these in DT.  So fix that and I'm happy.
> Whoever wants to pass this in from DT can do a patch for it!
>>
>> ---
>>
>> v2: Fixes suggested by Jonathan Cameron
>>     -Spelling
>>     -Simplify pdata!=NULL check
>>
>> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
> Acked-by: Jonathan Cameron <jic23@....ac.uk>
>> ---
>>  drivers/input/misc/cma3000_d0x.c |   20 +++++++++++++++-----
>>  1 files changed, 15 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/input/misc/cma3000_d0x.c b/drivers/input/misc/cma3000_d0x.c
>> index 1633b63..f2e87e3 100644
>> --- a/drivers/input/misc/cma3000_d0x.c
>> +++ b/drivers/input/misc/cma3000_d0x.c
>> @@ -62,6 +62,18 @@
>>  #define BIT_TO_2G  18
>>  #define BIT_TO_8G  71
>>
>> +static struct cma3000_platform_data cma3000_default_pdata = {
>> +     .mdthr = 0x8,
>> +     .mdfftmr = 0x33,
>> +     .ffthr = 0x8,
>> +     .mode = CMAMODE_MEAS400,
>> +     .g_range = CMARANGE_2G,
>> +     .fuzz_x = BIT_TO_2G,
>> +     .fuzz_y = BIT_TO_2G,
>> +     .fuzz_z = BIT_TO_2G,
>> +     .irqflags = 0,
>> +};
>> +
>>  struct cma3000_accl_data {
>>       const struct cma3000_bus_ops *bus_ops;
>>       const struct cma3000_platform_data *pdata;
>> @@ -289,13 +301,11 @@ struct cma3000_accl_data *cma3000_init(struct device *dev, int irq,
>>       int rev;
>>       int error;
>>
>> -     if (!pdata) {
>> -             dev_err(dev, "platform data not found\n");
>> -             error = -EINVAL;
>> -             goto err_out;
>> +     if (pdata == NULL) {
>> +             dev_info(dev, "platform data not found, using default\n");
>> +             pdata = &cma3000_default_pdata;
>>       }
>>
>> -
>>       /* if no IRQ return error */
>>       if (irq == 0) {
>>               error = -EINVAL;
>
>



-- 
Ricardo Ribalda
--
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