[PATCH v2 4/4] ARM: at91/dt: sama5d2 Xplained: pmic needs a specific sda hold time

From	Ludovic Desroches <ludovic.desroches@atmel.com>
Newsgroups	linux.kernel
Subject	[PATCH v2 4/4] ARM: at91/dt: sama5d2 Xplained: pmic needs a specific sda hold time
Date	2015-12-03 11:00 +0100
Message-ID	<qByQ9-3g4-1@gated-at.bofh.it> (permalink)
References	<qByQ9-3g4-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

Data have to be held longer for the PMIC device. The ACT8945A
datasheet claims that minimum SDA data hold time is about 300 ns.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
---
 arch/arm/boot/dts/at91-sama5d2_xplained.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/at91-sama5d2_xplained.dts b/arch/arm/boot/dts/at91-sama5d2_xplained.dts
index ad6de73..9bced00 100644
--- a/arch/arm/boot/dts/at91-sama5d2_xplained.dts
+++ b/arch/arm/boot/dts/at91-sama5d2_xplained.dts
@@ -129,6 +129,7 @@
 				dmas = <0>, <0>;
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_i2c0_default>;
+				i2c-sda-hold-time-ns = <350>;
 				status = "okay";
 
 				pmic: act8865@5b {
-- 
2.5.0

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[PATCH v2 4/4] ARM: at91/dt: sama5d2 Xplained: pmic needs a specific sda hold time Ludovic Desroches <ludovic.desroches@atmel.com> - 2015-12-03 11:00 +0100
  Re: [PATCH v2 4/4] ARM: at91/dt: sama5d2 Xplained: pmic needs a  specific sda hold time Nicolas Ferre <nicolas.ferre@atmel.com> - 2015-12-03 11:40 +0100

csiph-web