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Date: Thu, 23 Dec 2010 11:59:38 +1300 From: Ryan Mallon <ryan@...ewatersys.com> To: Alexey Charkov <alchark@...il.com> CC: Russell King - ARM Linux <linux@....linux.org.uk>, linux-arm-kernel@...ts.infradead.org, vt8500-wm8505-linux-kernel@...glegroups.com, Eric Miao <eric.y.miao@...il.com>, Uwe Kleine-König <u.kleine-koenig@...gutronix.de>, Albin Tonnerre <albin.tonnerre@...e-electrons.com>, linux-kernel@...r.kernel.org Subject: Re: [PATCH 1/6 v11] ARM: Add basic architecture support for VIA/WonderMedia 85xx SoC's On 12/23/2010 11:25 AM, Alexey Charkov wrote: > This adds support for the family of Systems-on-Chip produced initially > by VIA and now its subsidiary WonderMedia that have recently become > widespread in lower-end Chinese ARM-based tablets and netbooks. > > Support is included for both VT8500 and WM8505, selectable by a > configuration switch at kernel build time. > > Included are basic machine initialization files, register and > interrupt definitions, support for the on-chip interrupt controller, > high-precision OS timer, GPIO lines, necessary macros for early debug, > pulse-width-modulated outputs control, as well as platform device > configurations for the specific drivers implemented elsewhere. > > Signed-off-by: Alexey Charkov <alchark@...il.com> > --- > > This incorporates latest comments by Ryan regarding helper inlines > in devices-{vt8500,wm8505}.c > > Best regards, > Alexey One final nitpick :-). > +static int vt8500_muxed_gpio_direction_input(struct gpio_chip *chip, > + unsigned offset) > +{ > + struct vt8500_gpio_chip *vt8500_chip = to_vt8500(chip); > + unsigned val = readl(regbase + 0x20 + vt8500_chip->regoff); > + > + val &= ~(1 << vt8500_chip->shift << offset); > + writel(val, regbase + 0x20 + vt8500_chip->regoff); The magic numbers (0x20) in the gpio functions should probably be #defined as register names. I'm guessing this is the input enable register? Often people do helper functions for this, i.e: static inline void gpio_write_reg(struct vt8500_gpio_chip *chip, unsigned val, unsigned reg) { writel(val, regbase + chip->regoff + reg); } Other than that, looks good. Reviewed-by: Ryan Mallon <ryan@...ewatersys.com> -- Bluewater Systems Ltd - ARM Technology Solution Centre Ryan Mallon 5 Amuri Park, 404 Barbadoes St ryan@...ewatersys.com PO Box 13 889, Christchurch 8013 http://www.bluewatersys.com New Zealand Phone: +64 3 3779127 Freecall: Australia 1800 148 751 Fax: +64 3 3779135 USA 1800 261 2934 -- 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/
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