linux-kernel - Re: [PATCH v7 12/24] pwm: jz4740: Use regmap and clocks from TCU driver

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Message-ID: <20181012103957.GF9162@ulmo>
Date:   Fri, 12 Oct 2018 12:39:57 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        Jonathan Corbet <corbet@....net>, od@...c.me,
        Mathieu Malaterre <malat@...ian.org>,
        linux-pwm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-watchdog@...r.kernel.org,
        linux-mips@...ux-mips.org, linux-doc@...r.kernel.org,
        linux-clk@...r.kernel.org
Subject: Re: [PATCH v7 12/24] pwm: jz4740: Use regmap and clocks from TCU
 driver

On Tue, Aug 21, 2018 at 07:16:23PM +0200, Paul Cercueil wrote:
> The ingenic-timer "TCU" driver provides us with a regmap, that we can
> use to safely access the TCU registers.
> 
> It also provides us with clocks, that can be (un)gated, reparented or
> reclocked from devicetree, instead of having these settings hardcoded in
> this driver.
> 
> While this driver is devicetree-compatible, it is never (as of now)
> probed from devicetree, so this change does not introduce a ABI problem
> with current devicetree files.
> 
> Signed-off-by: Paul Cercueil <paul@...pouillou.net>
> ---
> 
> Notes:
>      v5: New patch
>     
>      v6: Drop requirement of probing from devicetree
>     
>      v7: No change
> 
>  drivers/pwm/Kconfig      |   2 +
>  drivers/pwm/pwm-jz4740.c | 124 +++++++++++++++++++++++++++++++----------------
>  2 files changed, 83 insertions(+), 43 deletions(-)
> 
> diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
> index a4d262db9945..58359bf22b96 100644
> --- a/drivers/pwm/Kconfig
> +++ b/drivers/pwm/Kconfig
> @@ -202,6 +202,8 @@ config PWM_IMX
>  config PWM_JZ4740
>  	tristate "Ingenic JZ47xx PWM support"
>  	depends on MACH_INGENIC
> +	depends on COMMON_CLK
> +	select INGENIC_TIMER
>  	help
>  	  Generic PWM framework driver for Ingenic JZ47xx based
>  	  machines.
> diff --git a/drivers/pwm/pwm-jz4740.c b/drivers/pwm/pwm-jz4740.c
> index a7b134af5e04..1bda8d8e9865 100644
> --- a/drivers/pwm/pwm-jz4740.c
> +++ b/drivers/pwm/pwm-jz4740.c
> @@ -14,21 +14,21 @@
>   */
>  
>  #include <linux/clk.h>
> +#include <linux/clk-provider.h>

Why do you need this?

Thierry

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