netdev - Re: [PATCH net-next v1 1/1] net: dsa: hellcreek: Get rid of custom led_init_default_state

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Date:   Wed, 03 Aug 2022 07:35:25 +0200
From:   Kurt Kanzenbach <kurt@...utronix.de>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Subject: Re: [PATCH net-next v1 1/1] net: dsa: hellcreek: Get rid of custom
 led_init_default_state_get()

On Wed Aug 03 2022, Andy Shevchenko wrote:
> LED core provides a helper to parse default state from firmware node.
> Use it instead of custom implementation.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>  drivers/net/dsa/hirschmann/hellcreek_ptp.c | 45 ++++++++++++----------
>  1 file changed, 24 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/net/dsa/hirschmann/hellcreek_ptp.c b/drivers/net/dsa/hirschmann/hellcreek_ptp.c
> index b28baab6d56a..793b2c296314 100644
> --- a/drivers/net/dsa/hirschmann/hellcreek_ptp.c
> +++ b/drivers/net/dsa/hirschmann/hellcreek_ptp.c
> @@ -297,7 +297,8 @@ static enum led_brightness hellcreek_led_is_gm_get(struct led_classdev *ldev)
>  static int hellcreek_led_setup(struct hellcreek *hellcreek)
>  {
>  	struct device_node *leds, *led = NULL;
> -	const char *label, *state;
> +	enum led_default_state state;
> +	const char *label;
>  	int ret = -EINVAL;
>  
>  	of_node_get(hellcreek->dev->of_node);
> @@ -318,16 +319,17 @@ static int hellcreek_led_setup(struct hellcreek *hellcreek)
>  	ret = of_property_read_string(led, "label", &label);
>  	hellcreek->led_sync_good.name = ret ? "sync_good" : label;
>  
> -	ret = of_property_read_string(led, "default-state", &state);
> -	if (!ret) {
> -		if (!strcmp(state, "on"))
> -			hellcreek->led_sync_good.brightness = 1;
> -		else if (!strcmp(state, "off"))
> -			hellcreek->led_sync_good.brightness = 0;
> -		else if (!strcmp(state, "keep"))
> -			hellcreek->led_sync_good.brightness =
> -				hellcreek_get_brightness(hellcreek,
> -							 STATUS_OUT_SYNC_GOOD);
> +	state = led_init_default_state_get(of_fwnode_handle(led));

Applied your patch to net-next/master and this yields:

|drivers/net/dsa/hirschmann/hellcreek_ptp.c: In function ‘hellcreek_led_setup’:
|drivers/net/dsa/hirschmann/hellcreek_ptp.c:430:10: error: implicit declaration of function ‘led_init_default_state_get’; did you mean ‘led_get_default_pattern’? [-Werror=implicit-function-declaration]
|  430 |  state = led_init_default_state_get(of_fwnode_handle(led));
|      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~
|      |          led_get_default_pattern

The header is missing:

|diff --git a/drivers/net/dsa/hirschmann/hellcreek_ptp.c b/drivers/net/dsa/hirschmann/hellcreek_ptp.c
|index df339f3e1803..430f39172d58 100644
|--- a/drivers/net/dsa/hirschmann/hellcreek_ptp.c
|+++ b/drivers/net/dsa/hirschmann/hellcreek_ptp.c
|@@ -14,6 +14,8 @@
| #include "hellcreek_ptp.h"
| #include "hellcreek_hwtstamp.h"
| 
|+#include "../../../leds/leds.h"
|+
| u16 hellcreek_ptp_read(struct hellcreek *hellcreek, unsigned int offset)
| {
|        return readw(hellcreek->ptp_base + offset);

Maybe move led_init_default_state_get() to linux/leds.h?

Thanks,
Kurt

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