[PATCH 1/1] ARM: imx: make the imx timer driver implementation independent of SoCs.

[baruch@tkos.co.il (Baruch Siach)]

Hi Shenwei Wang,

On Wed, Apr 29, 2015 at 02:55:52PM +0000, Shenwei Wang wrote:
> > -----Original Message-----
> > From: Baruch Siach [mailto:baruch at tkos.co.il]
> > Sent: 2015?4?29? 9:26
> > To: Wang Shenwei-B38339
> > Cc: shawn.guo at linaro.org; linux-arm-kernel at lists.infradead.org;
> > devicetree at vger.kernel.org
> > Subject: Re: [PATCH 1/1] ARM: imx: make the imx timer driver implementation
> > independent of SoCs.
> > 
> > On Wed, Apr 29, 2015 at 09:14:41AM -0500, Shenwei Wang wrote:
> > > There are 4 versions of the timer hardware on Freescale MXC hardware.
> > > --Version 0: MX1/MXL
> > > --Version 1: MX21, MX27.
> > > --Version 2: MX25, MX31, MX35, MX37, MX51, MX6Q
> > > --Version 3: MX6DL, MX6SX
> > >
> > > This patch has removed the SoC related codes, and implemented the
> > > driver directly upon the hardware timer IP version.
> > >
> > > The new driver can be installed via device tree or the direct function
> > > call to mxc_timer_init in order to support imx legacy systems like
> > > MX21 and MX27.
> > >
> > > For the device tree implementation, the driver is compatible with the
> > > current bindings like "fsl,imx6q-gpt", but for future dts file, the
> > > string like "fsl,imx-gpt-v2" without SoC information is recommended.
> > 
> > That is not the usual convention for IP block versions.
> > 
> > Please Cc the devicetree list (added).
>
> Thank you for the comments. What is the current naming rules for IP block 
> version? It would be appreciated if you could provide an example.

When several SoC share the same IP block the usual convention is to name it in 
the compatible property string after the first SoC it appeared on. Just look 
at some binding documentation from Documentation/devicetree/bindings/timer/ to 
find examples. The allwinner,sun5i-a13-hstimer property is shared by A10s and 
A13 SoCs. The amlogic,meson6-timer is shared by Meson6 and Meson8 SoCs, and so 
on.

baruch

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