From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shawn Guo Subject: Re: [PATCH] dt: remove of_alias_get_id() reference Date: Fri, 5 Aug 2011 01:13:02 +0800 Message-ID: <20110804170932.GA10897@freescale.com> References: <20110804102950.10845.67898.stgit@ponder> <20110804103336.GE17540@legolas.emea.dhcp.ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <20110804103336.GE17540-UiBtZHVXSwEVvW8u9ZQWYwjfymiNCTlR@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Sender: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org To: Felipe Balbi Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org On Thu, Aug 04, 2011 at 01:33:37PM +0300, Felipe Balbi wrote: > On Thu, Aug 04, 2011 at 11:30:27AM +0100, Grant Likely wrote: > > of_alias_get_id() is broken and being reverted. Remove the reference > > to it and replace with a single incrementing id number. > > > > There is no risk of regression here on the imx driver since the imx > > change to use of_alias_get_id() is commit 22698aa2, "serial/imx: add > > device tree probe support" which is new for v3.1, and it won't get > > used unless CONFIG_OF is enabled and the board is booted using a > > device tree. A single incrementing integer is sufficient for now. > > > > Signed-off-by: Grant Likely > > Acked-by: Shawn Guo > > --- > > > > I'm about to ask Linus to pull this patch through the devicetree/merge > > branch along with the of_alias revert. > > > > drivers/tty/serial/imx.c | 13 ++++--------- > > 1 files changed, 4 insertions(+), 9 deletions(-) > > > > diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c > > index 827db76..7e91b3d 100644 > > --- a/drivers/tty/serial/imx.c > > +++ b/drivers/tty/serial/imx.c > > @@ -1286,22 +1286,17 @@ static int serial_imx_resume(struct platform_device *dev) > > static int serial_imx_probe_dt(struct imx_port *sport, > > struct platform_device *pdev) > > { > > + static int portnum = 0; > > would it be better to use an IDR here ? > This patch is a step back to avoid using of_alias_* api since it's been reverted. But we need to fix the api to make it right later. That said the serial will still go after the of_alias_get_id. What we want is a fixed device id for specified serial instance, which is defined by device tree (in turn by hardware), instead of a random id. I'm not sure that I completely understand what IDR is exactly for. But from the documentation in lib/idr.c, I feel it's not what we need here. Or can you please elaborate why it fits here? /* * You call it to allocate an id (an int) an associate with that id a * pointer or what ever, we treat it as a (void *). You can pass this * id to a user for him to pass back at a later time. You then pass * that id to this code and it returns your pointer. */ -- Regards, Shawn