lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Tue, 09 Sep 2014 17:47:53 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Alban Bedel <alban.bedel@...onic-design.de>
Cc:	Thierry Reding <thierry.reding@...il.com>,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	linux-pwm@...r.kernel.org, Grant Likely <grant.likely@...aro.org>,
	Kumar Gala <galak@...eaurora.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Mark Rutland <mark.rutland@....com>,
	Pawel Moll <pawel.moll@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Roland Stigge <stigge@...com.de>
Subject: Re: [PATCH V3] pwm: lpc32xx - Add a driver for the motor PWM

On Tuesday 09 September 2014 17:42:41 Alban Bedel wrote:
> +config PWM_LPC32XX_MOTOR
> +	tristate "LPC32xx Motor PWM support"
> +	depends on ARCH_LPC32XX
> +	help
> +	  Generic PWM framework driver for LPC32xx motor PWM. The LPC32xx SOC
> +	  has one motor PWM controllers.
> +
> +	  To compile this driver as a module, choose M here: the module
> +	  will be called pwm-lpc32xx-motor.
> +

Can you change the dependency to ARCH_LPC32XX || COMPILE_TEST and
add explicit dependencies for the subsystems the driver depends
on (pwm and clk, I guess)? That would give us better build-time
coverage with allmodconfig.

> +	/* Write to limit register -> period */
> +	__raw_writel(period, lpc32xx->base + MCLIM_REG_OFFSET(pwm));
> +
> +	/* Write to match register -> duty */
> +	__raw_writel(period - duty, lpc32xx->base + MCMAT_REG_OFFSET(pwm));

Please don't use __raw_{writel,readl} in driver, and change that to use
readl_relaxed()/writel_relaxed().

	Arnd
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists