linux-kernel - Re: [PATCH] pwm: bcm2835: Dynamically allocate base

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Date:   Tue, 04 Feb 2020 10:17:43 +0100
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     Florian Fainelli <f.fainelli@...il.com>,
        linux-kernel@...r.kernel.org
Cc:     "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:PWM SUBSYSTEM" <linux-pwm@...r.kernel.org>,
        Bart Tanghe <bart.tanghe@...masmore.be>,
        Scott Branden <sbranden@...adcom.com>,
        Stephen Warren <swarren@...dotorg.org>,
        Ray Jui <rjui@...adcom.com>,
        Thierry Reding <thierry.reding@...il.com>,
        "maintainer:BROADCOM BCM281XX/BCM11XXX/BCM216XX ARM ARCHITE..." 
        <bcm-kernel-feedback-list@...adcom.com>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-rpi-kernel@...ts.infradead.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
Subject: Re: [PATCH] pwm: bcm2835: Dynamically allocate base

On Mon, 2020-02-03 at 13:35 -0800, Florian Fainelli wrote:
> The newer 2711 and 7211 chips have two PWM controllers and failure to
> dynamically allocate the PWM base would prevent the second PWM
> controller instance being probed for succeeding with an -EEXIST error
> from alloc_pwms().
> 
> Fixes: e5a06dc5ac1f ("pwm: Add BCM2835 PWM driver")
> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
> ---

Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>

>  drivers/pwm/pwm-bcm2835.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/pwm/pwm-bcm2835.c b/drivers/pwm/pwm-bcm2835.c
> index 91e24f01b54e..d78f86f8e462 100644
> --- a/drivers/pwm/pwm-bcm2835.c
> +++ b/drivers/pwm/pwm-bcm2835.c
> @@ -166,6 +166,7 @@ static int bcm2835_pwm_probe(struct platform_device *pdev)
>  
>  	pc->chip.dev = &pdev->dev;
>  	pc->chip.ops = &bcm2835_pwm_ops;
> +	pc->chip.base = -1;
>  	pc->chip.npwm = 2;
>  	pc->chip.of_xlate = of_pwm_xlate_with_flags;
>  	pc->chip.of_pwm_n_cells = 3;


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