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author | Imre Kaloz <kaloz@openwrt.org> | 2015-01-25 15:36:47 +0000 |
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committer | Imre Kaloz <kaloz@openwrt.org> | 2015-01-25 15:36:47 +0000 |
commit | d9c6ff8c2524c66801d9e1f9eedfc102a6464498 (patch) | |
tree | de269919d669e252654c03e8864720f9f44e36e6 /target/linux/mvebu/patches-3.18/203-dt_bindings_extend_mvebu_gpio_documentation_with_pwm.patch | |
parent | 9a172c70ebb756d09c6dd02abbb3aec4535fb86e (diff) | |
download | upstream-d9c6ff8c2524c66801d9e1f9eedfc102a6464498.tar.gz upstream-d9c6ff8c2524c66801d9e1f9eedfc102a6464498.tar.bz2 upstream-d9c6ff8c2524c66801d9e1f9eedfc102a6464498.zip |
mvebu: gpio based pwm support
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
SVN-Revision: 44129
Diffstat (limited to 'target/linux/mvebu/patches-3.18/203-dt_bindings_extend_mvebu_gpio_documentation_with_pwm.patch')
-rw-r--r-- | target/linux/mvebu/patches-3.18/203-dt_bindings_extend_mvebu_gpio_documentation_with_pwm.patch | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-3.18/203-dt_bindings_extend_mvebu_gpio_documentation_with_pwm.patch b/target/linux/mvebu/patches-3.18/203-dt_bindings_extend_mvebu_gpio_documentation_with_pwm.patch new file mode 100644 index 0000000000..48f93944bf --- /dev/null +++ b/target/linux/mvebu/patches-3.18/203-dt_bindings_extend_mvebu_gpio_documentation_with_pwm.patch @@ -0,0 +1,52 @@ +Document the optional parameters needed for PWM operation of gpio +lines. + +Signed-off-by: Andrew Lunn <andrew@lunn.ch> +--- + .../devicetree/bindings/gpio/gpio-mvebu.txt | 31 ++++++++++++++++++++++ + 1 file changed, 31 insertions(+) + +--- a/Documentation/devicetree/bindings/gpio/gpio-mvebu.txt ++++ b/Documentation/devicetree/bindings/gpio/gpio-mvebu.txt +@@ -38,6 +38,23 @@ Required properties: + - #gpio-cells: Should be two. The first cell is the pin number. The + second cell is reserved for flags, unused at the moment. + ++Optional properties: ++ ++In order to use the gpio lines in PWM mode, some additional optional ++properties are required. Only Armada 370 and XP supports these ++properties. ++ ++- reg: an additional register set is needed, for the GPIO Blink ++ Counter on/off registers. ++ ++- reg-names: Must contain an entry "pwm" corresponding to the ++ additional register range needed for pwm operation. ++ ++- #pwm-cells: Should be two. The first cell is the pin number. The ++ second cell is reserved for flags, unused at the moment. ++ ++- clocks: Must be a phandle to the clock for the gpio controller. ++ + Example: + + gpio0: gpio@d0018100 { +@@ -51,3 +68,17 @@ Example: + #interrupt-cells = <2>; + interrupts = <16>, <17>, <18>, <19>; + }; ++ ++ gpio1: gpio@18140 { ++ compatible = "marvell,orion-gpio"; ++ reg = <0x18140 0x40>, <0x181c8 0x08>; ++ reg-names = "gpio", "pwm"; ++ ngpios = <17>; ++ gpio-controller; ++ #gpio-cells = <2>; ++ #pwm-cells = <2>; ++ interrupt-controller; ++ #interrupt-cells = <2>; ++ interrupts = <87>, <88>, <89>; ++ clocks = <&coreclk 0>; ++ }; |