On Wed, Mar 11, 2015 at 02:19:32PM +0530, Vignesh R wrote: > > > On Tuesday 10 March 2015 09:33 PM, Tom Rini wrote: > > On Tue, Mar 10, 2015 at 08:41:21PM +0530, Vignesh R wrote: > > > >> TI's pcf8575 is a 16-bit I2C based GPIO expander.The device features a > >> 16-bit quasi-bidirectional I/O ports. Each quasi-bidirectional I/O can > >> be used as an input or output without the use of a data-direction > >> control signal. The I/Os should be high before being used as inputs. > >> > >> This driver is based on pcf857x driver available in Linux 4.0 kernel. > >> It supports basic reading and writing of gpio pins. > > > > For attribution of stuff ported from the kernel please see > > http://www.denx.de/wiki/view/U-Boot/Patches#Attributing_Code_Copyrights_Sign > > > > [snip] > >> diff --git a/drivers/gpio/pcf8575.c b/drivers/gpio/pcf8575.c > >> new file mode 100644 > >> index 000000000000..1ee92a29760a > >> --- /dev/null > >> +++ b/drivers/gpio/pcf8575.c > >> @@ -0,0 +1,248 @@ > >> +/* > >> + * PCF8575 I2C GPIO EXPANDER DRIVER > >> + * > >> + * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/ > >> + * > >> + * This program is free software; you can redistribute it and/or > >> + * modify it under the terms of the GNU General Public License as > >> + * published by the Free Software Foundation version 2. > >> + * > >> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any > >> + * kind, whether express or implied; without even the implied warranty > >> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > >> + * GNU General Public License for more details. > >> + */ > > > > Please use SPDX tags for new files, thanks. > > > > And right up front, this driver isn't using device model, please re-work > > and update to use that framework, thanks! > > Thanks for reviewing. > > I can switch to device model, but DRA72 does not support device tree and > hence I will not be able use device model based pcf driver in my use-case.
Starting the move to DT is very easy, I would swear. For example, am335x_boneblack_vboot switches am335x over to DM and includes a device tree, but it's only used for the verified boot part now. -- Tom
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