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Date: Thu, 9 Apr 2020 22:12:44 +0800 From: Baolin Wang <baolin.wang7@...il.com> To: Mark Brown <broonie@...nel.org> Cc: Lee Jones <lee.jones@...aro.org>, Arnd Bergmann <arnd@...db.de>, Orson Zhai <orsonzhai@...il.com>, Chunyan Zhang <zhang.lyra@...il.com>, LKML <linux-kernel@...r.kernel.org> Subject: Re: [RFC PATCH 2/3] regmap: Add reg_update_bits() support Hi Mark, On Thu, Apr 9, 2020 at 6:45 PM Mark Brown <broonie@...nel.org> wrote: > > On Thu, Apr 09, 2020 at 04:57:58PM +0800, Baolin Wang wrote: > > Add reg_update_bits() support in case some platforms use a special method > > to update bits of registers. > > > > Signed-off-by: Baolin Wang <baolin.wang7@...il.com> > > --- > > drivers/base/regmap/regmap-mmio.c | 29 ++++++++++++++++++++++++++++- > > drivers/base/regmap/regmap.c | 1 + > > MMIO devices clearly don't physically have an update_bits() operation so > this should be implemented further up the stack where it applies to all > buses without physical support. I understood your concern. But the syscon driver need use the MMIO devices' resources (such as address mapping, clock management and so on), if move this to further up stack, I am afraid the update_bits() can not use the resources in 'struct regmap_mmio_context'. Do you have any good suggestion? Thanks. -- Baolin Wang
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