Messages in this thread | | | Date | Mon, 17 Jun 2013 19:52:23 +0100 | From | Russell King - ARM Linux <> | Subject | Re: [RFC PATCH 03/11] dma: amba-pl08x: Add support for different offset of CONFIG register |
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On Sun, Jun 16, 2013 at 10:54:10PM +0200, Tomasz Figa wrote: > Some variants of PL08x (namely PL080S, found in Samsung S3C64xx SoCs) > have CONFIG register at different offset. This patch makes the driver > use offset from vendor data struct.
I'd suggest doing this a different way. Instead of having to pass around two pointers everywhere in order to access this register, add to struct pl08x_phy_chan a void __iomem *reg_config; member, and initialize that to base + vd->config_offset. Then use ch->reg_cfg instead of ch->base + PL080_CH_CONFIG.
This has the benefit that you won't have to modify a whole load of functions to pass another argument, which costs not only an additional register, but also storage to keep it around.
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