From: Hao Zhang <hao5781286@gmail.com>
To: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: Thierry Reding <thierry.reding@gmail.com>,
robh+dt@kernel.org, Mark Rutland <mark.rutland@arm.com>,
linux@armlinux.org.uk, Chen-Yu Tsai <wens@csie.org>,
Claudiu Beznea <Claudiu.Beznea@microchip.com>,
linux-gpio@vger.kernel.org,
open list <linux-kernel@vger.kernel.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>,
"moderated list:ARM/Allwinner sunXi SoC support"
<linux-arm-kernel@lists.infradead.org>,
linux-pwm@vger.kernel.org, linux-sunxi@googlegroups.com
Subject: Re: [PATCH v2 4/4] ARM: PWM: add allwinner sun8i pwm support.
Date: Mon, 14 May 2018 22:45:44 +0800 [thread overview]
Message-ID: <CAJeuY7-Dz1u9J8GMu=OdzJ2cJUnE3wEobJoQz6RV-ibjBjoW4A@mail.gmail.com> (raw)
In-Reply-To: <20180226090038.etk5q4pd4rl5dvf6@flea.lan>
2018-02-26 17:00 GMT+08:00 Maxime Ripard <maxime.ripard@bootlin.com>:
> Hi,
>
> Thanks for respinning this serie. It looks mostly good, but you still
> have a quite significant number of checkpatch (--strict) warnings that
> you should address.
Thanks for reviews :) ,i'm sorry for that, it will be fixed next time.
and, besides, in what situation were the checkpatch warning can be ignore?
>
> On Sun, Feb 25, 2018 at 09:53:08PM +0800, hao_zhang wrote:
>> +#define CAPTURE_IRQ_ENABLE_REG 0x0010
>> +#define CFIE(ch) BIT(ch << 1 + 1)
>> +#define CRIE(ch) BIT(ch << 1)
>
> You should also put your argument between parentheses here (and in all
> your other macros).
Do you mean like this ?
#define CFIE(ch) BIT((ch) << 1 + 1)
#define CRIE(ch) BIT((ch) << 1)
>
>> +static const u16 div_m_table[] = {
>> + 1,
>> + 2,
>> + 4,
>> + 8,
>> + 16,
>> + 32,
>> + 64,
>> + 128,
>> + 256
>> +};
>
> If this is just a power of two, you can use either the power of two /
> ilog2 to switch back and forth, instead of using that table.
I think using table is more explicit and extended...
>
>> +static int sun8i_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
>> + struct pwm_state *state)
>> +{
>> + int ret;
>> + struct sun8i_pwm_chip *sun8i_pwm = to_sun8i_pwm_chip(chip);
>> + struct pwm_state cstate;
>> +
>> + pwm_get_state(pwm, &cstate);
>> + if (!cstate.enabled) {
>> + ret = clk_prepare_enable(sun8i_pwm->clk);
>> + if (ret) {
>> + dev_err(chip->dev, "Failed to enable PWM clock\n");
>> + return ret;
>> + }
>> + }
>> +
>> + spin_lock(&sun8i_pwm->ctrl_lock);
>
> What do you need that spinlock for? Can you use a mutex instead?
It should be remove.
>
> Thanks!
> Maxime
>
> --
> Maxime Ripard, Bootlin (formerly Free Electrons)
> Embedded Linux and Kernel engineering
> https://bootlin.com
next prev parent reply other threads:[~2018-05-14 14:45 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-25 13:53 [PATCH v2 4/4] ARM: PWM: add allwinner sun8i pwm support hao_zhang
2018-02-26 9:00 ` Maxime Ripard
2018-05-14 14:45 ` Hao Zhang [this message]
2018-05-15 11:17 ` Maxime Ripard
2018-05-17 14:48 ` Hao Zhang
2018-05-18 8:15 ` Maxime Ripard
2018-02-28 1:55 ` [linux-sunxi] " André Przywara
2018-05-14 15:39 ` Hao Zhang
2018-02-28 8:17 ` Claudiu Beznea
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