Mr Brown, On Wed, 30 Mar 2016, Thor Thayer wrote: > On 03/30/2016 06:51 AM, Lee Jones wrote: > >On Tue, 29 Mar 2016, tthayer@xxxxxxxxxxxxxxxxxxxxx wrote: > > > >>From: Thor Thayer <tthayer@xxxxxxxxxxxxxxxxxxxxx> > >> > >>Add support for the Altera Arria10 Development Kit System Resource > >>chip which is implemented using a MAX5 as a external gpio extender, > >>and hardware monitor with the regmap framework over a SPI bus. > >> > >>Signed-off-by: Thor Thayer <tthayer@xxxxxxxxxxxxxxxxxxxxx> > >>--- > > [...] > > >>index 0000000..13665d4 > >>--- /dev/null > >>+++ b/drivers/mfd/altera-a10sr.c > >>@@ -0,0 +1,177 @@ > >>+/* > >>+ * Copyright Altera Corporation (C) 2014-2016. All Rights Reserved > >>+ * > >>+ * This program is free software; you can redistribute it and/or modify it > >>+ * under the terms and conditions of the GNU General Public License, > >>+ * version 2, as published by the Free Software Foundation. > >>+ * > >>+ * This program is distributed in the hope it will be useful, but WITHOUT > >>+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or > >>+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for > >>+ * more details. > >>+ * > >>+ * You should have received a copy of the GNU General Public License along with > >>+ * this program. If not, see <http://www.gnu.org/licenses/>. > > > >Any chance you can use the shorter copyright header? > > > > This is the header that Altera has specified and that we're > operating under. We haven't received guidance on Intel's header yet > but it may change as a result of our acquisition by Intel. Fair enough. > >>+ > >>+ /* > >>+ * We can't use the standard regmap_update_bits function because > >>+ * the read register has a different address than the write register. > >>+ * Therefore, just do a read, modify, write operation here. > >>+ */ > >>+ ret = regmap_read(a10sr->regmap, (reg | READ_REG_MASK), &rval); > >>+ if (ret < 0) > >>+ return ret; > >>+ > >>+ rval = ((rval & ~bit_mask) | (reg_val & bit_mask)); > >>+ > >>+ ret = regmap_write(a10sr->regmap, (reg & WRITE_REG_MASK), rval); > >>+ > >>+ return ret; > >>+} > > > >Why can't you use the Regmap update function(s)? > > The read register has a different address than the write register > which is handled in this function with the masks (read address is > odd, write address is even). Mark, do we have an API which handled such a configuration? > Thank you for the review of my patch set. I will implement the > changes that you pointed out. Thank you for reviewing! -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
