| Message ID | 20190821013936.12223-1-andrew.smirnov@gmail.com (mailing list archive) |
|---|---|
| State | Mainlined |
| Commit | 801592402c392acb0f2ead971d1e8f0e0565b60e |
| Headers | show |
| Series | [v2] ARM: dts: vf610-zii-cfu1: Slow I2C0 down to 100 kHz | expand |
On Tue, Aug 20, 2019 at 06:39:36PM -0700, Andrey Smirnov wrote: > Fiber-optic modules attached to the bus are only rated to work at > 100 kHz, so decrease the bus frequency to accommodate that. > > Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> > Cc: Shawn Guo <shawnguo@kernel.org> > Cc: Chris Healy <cphealy@gmail.com> > Cc: Fabio Estevam <festevam@gmail.com> > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-kernel@vger.kernel.org Reviewed-by: Andrew Lunn <andrew@lunn.ch> I took a quick look at some of the SFP standards. 100KHz is part of the standard. So we should try to remember to keep an eye of this as other boards are merged. Andrew
On Tue, Aug 20, 2019 at 06:39:36PM -0700, Andrey Smirnov wrote: > Fiber-optic modules attached to the bus are only rated to work at > 100 kHz, so decrease the bus frequency to accommodate that. > > Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> > Cc: Shawn Guo <shawnguo@kernel.org> > Cc: Chris Healy <cphealy@gmail.com> > Cc: Fabio Estevam <festevam@gmail.com> > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-kernel@vger.kernel.org Applied, thanks.
diff --git a/arch/arm/boot/dts/vf610-zii-cfu1.dts b/arch/arm/boot/dts/vf610-zii-cfu1.dts index ff460a1de85a..28732249cfc0 100644 --- a/arch/arm/boot/dts/vf610-zii-cfu1.dts +++ b/arch/arm/boot/dts/vf610-zii-cfu1.dts @@ -207,7 +207,7 @@ }; &i2c0 { - clock-frequency = <400000>; + clock-frequency = <100000>; pinctrl-names = "default"; pinctrl-0 = <&pinctrl_i2c0>; status = "okay";
Fiber-optic modules attached to the bus are only rated to work at 100 kHz, so decrease the bus frequency to accommodate that. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Chris Healy <cphealy@gmail.com> Cc: Fabio Estevam <festevam@gmail.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org --- Changes since [v1]: - Spelling fixes [v1] lore.kernel.org/lkml/20190820030804.8892-1-andrew.smirnov@gmail.com arch/arm/boot/dts/vf610-zii-cfu1.dts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)