Re: [PATCH 13/14] ARM: ux500: enable AB8500 GPIO for HREF
On Thursday 07 February 2013, Stephen Warren wrote: > On 02/05/2013 12:48 PM, Linus Walleij wrote: > > From: Lee Jones > > > > The AB8500 GPIO driver has been un-BROKEN and rewritten as a pinctrl > > driver. Now that it's back in use, let's ensure that it's available > > when booting HREF with Device Tree enabled. > > > diff --git a/arch/arm/boot/dts/hrefprev60.dts > > b/arch/arm/boot/dts/hrefprev60.dts > > > soc-u9500 { > > + prcmu@80157000 { > > + ab8500@5 { > > + ab8500-gpio { > > + compatible = "stericsson,ab8500-gpio"; > > The MFDs I've looked at (which admittedly might not be that many) all > have the top-level chip described in device tree, but not all the > component sub-devices, since they're all a static part of the top-level > chip. Instead, the top-level MFD instantiates all the sub-devices > itself. I'm curious why this MFD device works differently - do many work > like this? I think in general, describing only the top level in DT is preferred. However, that does not work if you have devices outside of the MFD refer to devices inside of it, such as GPIO, clocks or interrupts: In order to connect a button or an LED to this GPIO controller in DT, you need to have a node you can refer to that follows the GPIO binding. Putting all of that into the top-level device would get messy here. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH 13/14] ARM: ux500: enable AB8500 GPIO for HREF
On Thursday 07 February 2013, Stephen Warren wrote: On 02/05/2013 12:48 PM, Linus Walleij wrote: From: Lee Jones lee.jo...@linaro.org The AB8500 GPIO driver has been un-BROKEN and rewritten as a pinctrl driver. Now that it's back in use, let's ensure that it's available when booting HREF with Device Tree enabled. diff --git a/arch/arm/boot/dts/hrefprev60.dts b/arch/arm/boot/dts/hrefprev60.dts soc-u9500 { + prcmu@80157000 { + ab8500@5 { + ab8500-gpio { + compatible = stericsson,ab8500-gpio; The MFDs I've looked at (which admittedly might not be that many) all have the top-level chip described in device tree, but not all the component sub-devices, since they're all a static part of the top-level chip. Instead, the top-level MFD instantiates all the sub-devices itself. I'm curious why this MFD device works differently - do many work like this? I think in general, describing only the top level in DT is preferred. However, that does not work if you have devices outside of the MFD refer to devices inside of it, such as GPIO, clocks or interrupts: In order to connect a button or an LED to this GPIO controller in DT, you need to have a node you can refer to that follows the GPIO binding. Putting all of that into the top-level device would get messy here. Arnd -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH 13/14] ARM: ux500: enable AB8500 GPIO for HREF
On 02/05/2013 12:48 PM, Linus Walleij wrote: > From: Lee Jones > > The AB8500 GPIO driver has been un-BROKEN and rewritten as a pinctrl > driver. Now that it's back in use, let's ensure that it's available > when booting HREF with Device Tree enabled. > diff --git a/arch/arm/boot/dts/hrefprev60.dts > b/arch/arm/boot/dts/hrefprev60.dts > soc-u9500 { > + prcmu@80157000 { > + ab8500@5 { > + ab8500-gpio { > + compatible = "stericsson,ab8500-gpio"; The MFDs I've looked at (which admittedly might not be that many) all have the top-level chip described in device tree, but not all the component sub-devices, since they're all a static part of the top-level chip. Instead, the top-level MFD instantiates all the sub-devices itself. I'm curious why this MFD device works differently - do many work like this? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH 13/14] ARM: ux500: enable AB8500 GPIO for HREF
On 02/05/2013 12:48 PM, Linus Walleij wrote: From: Lee Jones lee.jo...@linaro.org The AB8500 GPIO driver has been un-BROKEN and rewritten as a pinctrl driver. Now that it's back in use, let's ensure that it's available when booting HREF with Device Tree enabled. diff --git a/arch/arm/boot/dts/hrefprev60.dts b/arch/arm/boot/dts/hrefprev60.dts soc-u9500 { + prcmu@80157000 { + ab8500@5 { + ab8500-gpio { + compatible = stericsson,ab8500-gpio; The MFDs I've looked at (which admittedly might not be that many) all have the top-level chip described in device tree, but not all the component sub-devices, since they're all a static part of the top-level chip. Instead, the top-level MFD instantiates all the sub-devices itself. I'm curious why this MFD device works differently - do many work like this? -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH 13/14] ARM: ux500: enable AB8500 GPIO for HREF
From: Lee Jones The AB8500 GPIO driver has been un-BROKEN and rewritten as a pinctrl driver. Now that it's back in use, let's ensure that it's available when booting HREF with Device Tree enabled. Cc: a...@kernel.org Signed-off-by: Lee Jones Signed-off-by: Linus Walleij --- Requesting an ACK from the ARM SoC maintainers on this patch. --- arch/arm/boot/dts/hrefprev60.dts | 8 1 file changed, 8 insertions(+) diff --git a/arch/arm/boot/dts/hrefprev60.dts b/arch/arm/boot/dts/hrefprev60.dts index eec29c4..0c2b975 100644 --- a/arch/arm/boot/dts/hrefprev60.dts +++ b/arch/arm/boot/dts/hrefprev60.dts @@ -25,6 +25,14 @@ }; soc-u9500 { + prcmu@80157000 { + ab8500@5 { + ab8500-gpio { + compatible = "stericsson,ab8500-gpio"; + }; + }; + }; + i2c@80004000 { tps61052@33 { compatible = "tps61052"; -- 1.7.11.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH 13/14] ARM: ux500: enable AB8500 GPIO for HREF
From: Lee Jones lee.jo...@linaro.org The AB8500 GPIO driver has been un-BROKEN and rewritten as a pinctrl driver. Now that it's back in use, let's ensure that it's available when booting HREF with Device Tree enabled. Cc: a...@kernel.org Signed-off-by: Lee Jones lee.jo...@linaro.org Signed-off-by: Linus Walleij linus.wall...@linaro.org --- Requesting an ACK from the ARM SoC maintainers on this patch. --- arch/arm/boot/dts/hrefprev60.dts | 8 1 file changed, 8 insertions(+) diff --git a/arch/arm/boot/dts/hrefprev60.dts b/arch/arm/boot/dts/hrefprev60.dts index eec29c4..0c2b975 100644 --- a/arch/arm/boot/dts/hrefprev60.dts +++ b/arch/arm/boot/dts/hrefprev60.dts @@ -25,6 +25,14 @@ }; soc-u9500 { + prcmu@80157000 { + ab8500@5 { + ab8500-gpio { + compatible = stericsson,ab8500-gpio; + }; + }; + }; + i2c@80004000 { tps61052@33 { compatible = tps61052; -- 1.7.11.3 -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/