Documentation: pinctrl: palmas: Add ti,palmas-powerhold-override property definition

commit 0ea66f76ba17a4b229caaadd77de694111b21769 upstream.

GPIO7 is configured in POWERHOLD mode which has higher priority
over DEV_ON bit and keeps the PMIC supplies on even after the DEV_ON
bit is turned off. This property enables driver to over ride the
POWERHOLD value to GPIO7 so as to turn off the PMIC in power off
scenarios.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-palmas.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-palmas.txt
index caf297bee1fb4c34ef5151912656f9636fe1565e..c28d4eb83b7687fbb630af467c7b49fb5e7e25f7 100644 (file)
--- a/Documentation/devicetree/bindings/pinctrl/pinctrl-palmas.txt
+++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-palmas.txt
@@ -35,6 +35,15 @@ Optional properties:
 - ti,palmas-enable-dvfs2: Enable DVFS2. Configure pins for DVFS2 mode.
        Selection primary or secondary function associated to GPADC_START
        and SYSEN2 pin/pad for DVFS2 interface
+- ti,palmas-override-powerhold: This is applicable for PMICs for which
+       GPIO7 is configured in POWERHOLD mode which has higher priority
+       over DEV_ON bit and keeps the PMIC supplies on even after the DEV_ON
+       bit is turned off. This property enables driver to over ride the
+       POWERHOLD value to GPIO7 so as to turn off the PMIC in power off
+       scenarios. So for GPIO7 if ti,palmas-override-powerhold is set
+       then the GPIO_7 field should never be muxed to anything else.
+       It should be set to POWERHOLD by default and only in case of
+       power off scenarios the driver will over ride the mux value.
 
 This binding uses the following generic properties as defined in
 pinctrl-bindings.txt: