diff mbox

[1/2] media: i2c: adv748x: Simplify regmap configuration

Message ID 1518024886-842-2-git-send-email-kbingham@kernel.org (mailing list archive)
State Not Applicable
Delegated to: Geert Uytterhoeven
Headers show

Commit Message

Kieran Bingham Feb. 7, 2018, 5:34 p.m. UTC 
From: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>

The ADV748x has identical map configurations for each register map. The
duplication of each map can be simplified using a helper macro such that
each map is represented on a single line.

Define ADV748X_REGMAP_CONF for this purpose and un-define after it's
use.

Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
---
 drivers/media/i2c/adv748x/adv748x-core.c | 111 ++++++-------------------------
 1 file changed, 22 insertions(+), 89 deletions(-)

Comments

Niklas Söderlund Feb. 9, 2018, 3:39 p.m. UTC | #1 
Hi Kieran,

Thanks for your patch.

On 2018-02-07 17:34:45 +0000, Kieran Bingham wrote:
> From: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> 
> The ADV748x has identical map configurations for each register map. The
> duplication of each map can be simplified using a helper macro such that
> each map is represented on a single line.
> 
> Define ADV748X_REGMAP_CONF for this purpose and un-define after it's
> use.
> 
> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> ---
>  drivers/media/i2c/adv748x/adv748x-core.c | 111 ++++++-------------------------
>  1 file changed, 22 insertions(+), 89 deletions(-)
> 
> diff --git a/drivers/media/i2c/adv748x/adv748x-core.c b/drivers/media/i2c/adv748x/adv748x-core.c
> index fd92c9e4b519..71c69b816db2 100644
> --- a/drivers/media/i2c/adv748x/adv748x-core.c
> +++ b/drivers/media/i2c/adv748x/adv748x-core.c
> @@ -35,98 +35,31 @@
>   * Register manipulation
>   */
>  
> -static const struct regmap_config adv748x_regmap_cnf[] = {
> -	{
> -		.name			= "io",
> -		.reg_bits		= 8,
> -		.val_bits		= 8,
> -
> -		.max_register		= 0xff,
> -		.cache_type		= REGCACHE_NONE,
> -	},
> -	{
> -		.name			= "dpll",
> -		.reg_bits		= 8,
> -		.val_bits		= 8,
> -
> -		.max_register		= 0xff,
> -		.cache_type		= REGCACHE_NONE,
> -	},
> -	{
> -		.name			= "cp",
> -		.reg_bits		= 8,
> -		.val_bits		= 8,
> -
> -		.max_register		= 0xff,
> -		.cache_type		= REGCACHE_NONE,
> -	},
> -	{
> -		.name			= "hdmi",
> -		.reg_bits		= 8,
> -		.val_bits		= 8,
> -
> -		.max_register		= 0xff,
> -		.cache_type		= REGCACHE_NONE,
> -	},
> -	{
> -		.name			= "edid",
> -		.reg_bits		= 8,
> -		.val_bits		= 8,
> -
> -		.max_register		= 0xff,
> -		.cache_type		= REGCACHE_NONE,
> -	},
> -	{
> -		.name			= "repeater",
> -		.reg_bits		= 8,
> -		.val_bits		= 8,
> -
> -		.max_register		= 0xff,
> -		.cache_type		= REGCACHE_NONE,
> -	},
> -	{
> -		.name			= "infoframe",
> -		.reg_bits		= 8,
> -		.val_bits		= 8,
> -
> -		.max_register		= 0xff,
> -		.cache_type		= REGCACHE_NONE,
> -	},
> -	{
> -		.name			= "cec",
> -		.reg_bits		= 8,
> -		.val_bits		= 8,
> -
> -		.max_register		= 0xff,
> -		.cache_type		= REGCACHE_NONE,
> -	},
> -	{
> -		.name			= "sdp",
> -		.reg_bits		= 8,
> -		.val_bits		= 8,
> -
> -		.max_register		= 0xff,
> -		.cache_type		= REGCACHE_NONE,
> -	},
> -
> -	{
> -		.name			= "txb",
> -		.reg_bits		= 8,
> -		.val_bits		= 8,
> -
> -		.max_register		= 0xff,
> -		.cache_type		= REGCACHE_NONE,
> -	},
> -	{
> -		.name			= "txa",
> -		.reg_bits		= 8,
> -		.val_bits		= 8,
> +#define ADV748X_REGMAP_CONF(n) \
> +{ \
> +	.name = n, \
> +	.reg_bits = 8, \
> +	.val_bits = 8, \
> +	.max_register = 0xff, \
> +	.cache_type = REGCACHE_NONE, \
> +}
>  
> -		.max_register		= 0xff,
> -		.cache_type		= REGCACHE_NONE,
> -	},
> +static const struct regmap_config adv748x_regmap_cnf[] = {
> +	ADV748X_REGMAP_CONF("io"),
> +	ADV748X_REGMAP_CONF("dpll"),
> +	ADV748X_REGMAP_CONF("cp"),
> +	ADV748X_REGMAP_CONF("hdmi"),
> +	ADV748X_REGMAP_CONF("edid"),
> +	ADV748X_REGMAP_CONF("repeater"),
> +	ADV748X_REGMAP_CONF("infoframe"),
> +	ADV748X_REGMAP_CONF("cec"),
> +	ADV748X_REGMAP_CONF("sdp"),
> +	ADV748X_REGMAP_CONF("txa"),
> +	ADV748X_REGMAP_CONF("txb"),
>  };
>  
> +#undef ADV748X_REGMAP_CONF
> +

Why is this macro undefined here? It have a rather limited scope as it's 
only local to this C file and it have a good prefix of ADV748X_ so 
conflicts are highly unlikely. Is there something I'm missing?

Is it really customary to undefine helper macros like this once they are 
used to populate the structure?

>  static int adv748x_configure_regmap(struct adv748x_state *state, int region)
>  {
>  	int err;
> -- 
> 2.7.4
>
Kieran Bingham Feb. 9, 2018, 3:43 p.m. UTC | #2 
Hi Niklas,

On 09/02/18 15:39, Niklas Söderlund wrote:
> Hi Kieran,
> 
> Thanks for your patch.
> 
> On 2018-02-07 17:34:45 +0000, Kieran Bingham wrote:
>> From: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
>>
>> The ADV748x has identical map configurations for each register map. The
>> duplication of each map can be simplified using a helper macro such that
>> each map is represented on a single line.
>>
>> Define ADV748X_REGMAP_CONF for this purpose and un-define after it's
>> use.
>>
>> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
>> ---
>>  drivers/media/i2c/adv748x/adv748x-core.c | 111 ++++++-------------------------
>>  1 file changed, 22 insertions(+), 89 deletions(-)
>>
>> diff --git a/drivers/media/i2c/adv748x/adv748x-core.c b/drivers/media/i2c/adv748x/adv748x-core.c
>> index fd92c9e4b519..71c69b816db2 100644
>> --- a/drivers/media/i2c/adv748x/adv748x-core.c
>> +++ b/drivers/media/i2c/adv748x/adv748x-core.c
>> @@ -35,98 +35,31 @@
>>   * Register manipulation
>>   */
>>  
>> -static const struct regmap_config adv748x_regmap_cnf[] = {
>> -	{
>> -		.name			= "io",
>> -		.reg_bits		= 8,
>> -		.val_bits		= 8,
>> -
>> -		.max_register		= 0xff,
>> -		.cache_type		= REGCACHE_NONE,
>> -	},
>> -	{
>> -		.name			= "dpll",
>> -		.reg_bits		= 8,
>> -		.val_bits		= 8,
>> -
>> -		.max_register		= 0xff,
>> -		.cache_type		= REGCACHE_NONE,
>> -	},
>> -	{
>> -		.name			= "cp",
>> -		.reg_bits		= 8,
>> -		.val_bits		= 8,
>> -
>> -		.max_register		= 0xff,
>> -		.cache_type		= REGCACHE_NONE,
>> -	},
>> -	{
>> -		.name			= "hdmi",
>> -		.reg_bits		= 8,
>> -		.val_bits		= 8,
>> -
>> -		.max_register		= 0xff,
>> -		.cache_type		= REGCACHE_NONE,
>> -	},
>> -	{
>> -		.name			= "edid",
>> -		.reg_bits		= 8,
>> -		.val_bits		= 8,
>> -
>> -		.max_register		= 0xff,
>> -		.cache_type		= REGCACHE_NONE,
>> -	},
>> -	{
>> -		.name			= "repeater",
>> -		.reg_bits		= 8,
>> -		.val_bits		= 8,
>> -
>> -		.max_register		= 0xff,
>> -		.cache_type		= REGCACHE_NONE,
>> -	},
>> -	{
>> -		.name			= "infoframe",
>> -		.reg_bits		= 8,
>> -		.val_bits		= 8,
>> -
>> -		.max_register		= 0xff,
>> -		.cache_type		= REGCACHE_NONE,
>> -	},
>> -	{
>> -		.name			= "cec",
>> -		.reg_bits		= 8,
>> -		.val_bits		= 8,
>> -
>> -		.max_register		= 0xff,
>> -		.cache_type		= REGCACHE_NONE,
>> -	},
>> -	{
>> -		.name			= "sdp",
>> -		.reg_bits		= 8,
>> -		.val_bits		= 8,
>> -
>> -		.max_register		= 0xff,
>> -		.cache_type		= REGCACHE_NONE,
>> -	},
>> -
>> -	{
>> -		.name			= "txb",
>> -		.reg_bits		= 8,
>> -		.val_bits		= 8,
>> -
>> -		.max_register		= 0xff,
>> -		.cache_type		= REGCACHE_NONE,
>> -	},
>> -	{
>> -		.name			= "txa",
>> -		.reg_bits		= 8,
>> -		.val_bits		= 8,
>> +#define ADV748X_REGMAP_CONF(n) \
>> +{ \
>> +	.name = n, \
>> +	.reg_bits = 8, \
>> +	.val_bits = 8, \
>> +	.max_register = 0xff, \
>> +	.cache_type = REGCACHE_NONE, \
>> +}
>>  
>> -		.max_register		= 0xff,
>> -		.cache_type		= REGCACHE_NONE,
>> -	},
>> +static const struct regmap_config adv748x_regmap_cnf[] = {
>> +	ADV748X_REGMAP_CONF("io"),
>> +	ADV748X_REGMAP_CONF("dpll"),
>> +	ADV748X_REGMAP_CONF("cp"),
>> +	ADV748X_REGMAP_CONF("hdmi"),
>> +	ADV748X_REGMAP_CONF("edid"),
>> +	ADV748X_REGMAP_CONF("repeater"),
>> +	ADV748X_REGMAP_CONF("infoframe"),
>> +	ADV748X_REGMAP_CONF("cec"),
>> +	ADV748X_REGMAP_CONF("sdp"),
>> +	ADV748X_REGMAP_CONF("txa"),
>> +	ADV748X_REGMAP_CONF("txb"),
>>  };
>>  
>> +#undef ADV748X_REGMAP_CONF
>> +
> 
> Why is this macro undefined here? It have a rather limited scope as it's 
> only local to this C file and it have a good prefix of ADV748X_ so 
> conflicts are highly unlikely. Is there something I'm missing?
> 
> Is it really customary to undefine helper macros like this once they are 
> used to populate the structure?

You are right - this is probably unnecessary, as the scope is limited to this
file. I guess I was trying to further highlight that the scope of the macro is
limited to this specific table as well.

Certainly likely to be required if this was a header, but it's not. So I'm happy
to remove...

> 
>>  static int adv748x_configure_regmap(struct adv748x_state *state, int region)
>>  {
>>  	int err;
>> -- 
>> 2.7.4
>>
>
diff mbox

Patch

diff --git a/drivers/media/i2c/adv748x/adv748x-core.c b/drivers/media/i2c/adv748x/adv748x-core.c
index fd92c9e4b519..71c69b816db2 100644
--- a/drivers/media/i2c/adv748x/adv748x-core.c
+++ b/drivers/media/i2c/adv748x/adv748x-core.c
@@ -35,98 +35,31 @@ 
  * Register manipulation
  */
 
-static const struct regmap_config adv748x_regmap_cnf[] = {
-	{
-		.name			= "io",
-		.reg_bits		= 8,
-		.val_bits		= 8,
-
-		.max_register		= 0xff,
-		.cache_type		= REGCACHE_NONE,
-	},
-	{
-		.name			= "dpll",
-		.reg_bits		= 8,
-		.val_bits		= 8,
-
-		.max_register		= 0xff,
-		.cache_type		= REGCACHE_NONE,
-	},
-	{
-		.name			= "cp",
-		.reg_bits		= 8,
-		.val_bits		= 8,
-
-		.max_register		= 0xff,
-		.cache_type		= REGCACHE_NONE,
-	},
-	{
-		.name			= "hdmi",
-		.reg_bits		= 8,
-		.val_bits		= 8,
-
-		.max_register		= 0xff,
-		.cache_type		= REGCACHE_NONE,
-	},
-	{
-		.name			= "edid",
-		.reg_bits		= 8,
-		.val_bits		= 8,
-
-		.max_register		= 0xff,
-		.cache_type		= REGCACHE_NONE,
-	},
-	{
-		.name			= "repeater",
-		.reg_bits		= 8,
-		.val_bits		= 8,
-
-		.max_register		= 0xff,
-		.cache_type		= REGCACHE_NONE,
-	},
-	{
-		.name			= "infoframe",
-		.reg_bits		= 8,
-		.val_bits		= 8,
-
-		.max_register		= 0xff,
-		.cache_type		= REGCACHE_NONE,
-	},
-	{
-		.name			= "cec",
-		.reg_bits		= 8,
-		.val_bits		= 8,
-
-		.max_register		= 0xff,
-		.cache_type		= REGCACHE_NONE,
-	},
-	{
-		.name			= "sdp",
-		.reg_bits		= 8,
-		.val_bits		= 8,
-
-		.max_register		= 0xff,
-		.cache_type		= REGCACHE_NONE,
-	},
-
-	{
-		.name			= "txb",
-		.reg_bits		= 8,
-		.val_bits		= 8,
-
-		.max_register		= 0xff,
-		.cache_type		= REGCACHE_NONE,
-	},
-	{
-		.name			= "txa",
-		.reg_bits		= 8,
-		.val_bits		= 8,
+#define ADV748X_REGMAP_CONF(n) \
+{ \
+	.name = n, \
+	.reg_bits = 8, \
+	.val_bits = 8, \
+	.max_register = 0xff, \
+	.cache_type = REGCACHE_NONE, \
+}
 
-		.max_register		= 0xff,
-		.cache_type		= REGCACHE_NONE,
-	},
+static const struct regmap_config adv748x_regmap_cnf[] = {
+	ADV748X_REGMAP_CONF("io"),
+	ADV748X_REGMAP_CONF("dpll"),
+	ADV748X_REGMAP_CONF("cp"),
+	ADV748X_REGMAP_CONF("hdmi"),
+	ADV748X_REGMAP_CONF("edid"),
+	ADV748X_REGMAP_CONF("repeater"),
+	ADV748X_REGMAP_CONF("infoframe"),
+	ADV748X_REGMAP_CONF("cec"),
+	ADV748X_REGMAP_CONF("sdp"),
+	ADV748X_REGMAP_CONF("txa"),
+	ADV748X_REGMAP_CONF("txb"),
 };
 
+#undef ADV748X_REGMAP_CONF
+
 static int adv748x_configure_regmap(struct adv748x_state *state, int region)
 {
 	int err;