From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Ingo van Lil <inguin@gmx.de>, Peter Rosin <peda@axentia.se>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Sasha Levin <sashal@kernel.org>,
linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 083/252] ARM: dts: at91: Reenable UART TX pull-ups
Date: Fri, 14 Feb 2020 11:08:58 -0500 [thread overview]
Message-ID: <20200214161147.15842-83-sashal@kernel.org> (raw)
In-Reply-To: <20200214161147.15842-1-sashal@kernel.org>
From: Ingo van Lil <inguin@gmx.de>
[ Upstream commit 9d39d86cd4af2b17b970d63307daad71f563d207 ]
Pull-ups for SAM9 UART/USART TX lines were disabled in a previous
commit. However, several chips in the SAM9 family require pull-ups to
prevent the TX lines from falling (and causing an endless break
condition) when the transceiver is disabled.
From the SAM9G20 datasheet, 32.5.1: "To prevent the TXD line from
falling when the USART is disabled, the use of an internal pull up
is mandatory.". This commit reenables the pull-ups for all chips having
that sentence in their datasheets.
Fixes: 5e04822f7db5 ("ARM: dts: at91: fixes uart pinctrl, set pullup on rx, clear pullup on tx")
Signed-off-by: Ingo van Lil <inguin@gmx.de>
Cc: Peter Rosin <peda@axentia.se>
Link: https://lore.kernel.org/r/20191203142147.875227-1-inguin@gmx.de
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm/boot/dts/at91sam9260.dtsi | 12 ++++++------
arch/arm/boot/dts/at91sam9261.dtsi | 6 +++---
arch/arm/boot/dts/at91sam9263.dtsi | 6 +++---
arch/arm/boot/dts/at91sam9g45.dtsi | 8 ++++----
arch/arm/boot/dts/at91sam9rl.dtsi | 8 ++++----
5 files changed, 20 insertions(+), 20 deletions(-)
diff --git a/arch/arm/boot/dts/at91sam9260.dtsi b/arch/arm/boot/dts/at91sam9260.dtsi
index 9118e29b6d6ad..3fa6b9fbb8226 100644
--- a/arch/arm/boot/dts/at91sam9260.dtsi
+++ b/arch/arm/boot/dts/at91sam9260.dtsi
@@ -434,7 +434,7 @@
usart0 {
pinctrl_usart0: usart0-0 {
atmel,pins =
- <AT91_PIOB 4 AT91_PERIPH_A AT91_PINCTRL_NONE
+ <AT91_PIOB 4 AT91_PERIPH_A AT91_PINCTRL_PULL_UP
AT91_PIOB 5 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
@@ -468,7 +468,7 @@
usart1 {
pinctrl_usart1: usart1-0 {
atmel,pins =
- <AT91_PIOB 6 AT91_PERIPH_A AT91_PINCTRL_NONE
+ <AT91_PIOB 6 AT91_PERIPH_A AT91_PINCTRL_PULL_UP
AT91_PIOB 7 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
@@ -486,7 +486,7 @@
usart2 {
pinctrl_usart2: usart2-0 {
atmel,pins =
- <AT91_PIOB 8 AT91_PERIPH_A AT91_PINCTRL_NONE
+ <AT91_PIOB 8 AT91_PERIPH_A AT91_PINCTRL_PULL_UP
AT91_PIOB 9 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
@@ -504,7 +504,7 @@
usart3 {
pinctrl_usart3: usart3-0 {
atmel,pins =
- <AT91_PIOB 10 AT91_PERIPH_A AT91_PINCTRL_NONE
+ <AT91_PIOB 10 AT91_PERIPH_A AT91_PINCTRL_PULL_UP
AT91_PIOB 11 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
@@ -522,7 +522,7 @@
uart0 {
pinctrl_uart0: uart0-0 {
atmel,pins =
- <AT91_PIOA 31 AT91_PERIPH_B AT91_PINCTRL_NONE
+ <AT91_PIOA 31 AT91_PERIPH_B AT91_PINCTRL_PULL_UP
AT91_PIOA 30 AT91_PERIPH_B AT91_PINCTRL_PULL_UP>;
};
};
@@ -530,7 +530,7 @@
uart1 {
pinctrl_uart1: uart1-0 {
atmel,pins =
- <AT91_PIOB 12 AT91_PERIPH_A AT91_PINCTRL_NONE
+ <AT91_PIOB 12 AT91_PERIPH_A AT91_PINCTRL_PULL_UP
AT91_PIOB 13 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
};
diff --git a/arch/arm/boot/dts/at91sam9261.dtsi b/arch/arm/boot/dts/at91sam9261.dtsi
index 33f09d5ea0201..590d288529978 100644
--- a/arch/arm/boot/dts/at91sam9261.dtsi
+++ b/arch/arm/boot/dts/at91sam9261.dtsi
@@ -328,7 +328,7 @@
usart0 {
pinctrl_usart0: usart0-0 {
atmel,pins =
- <AT91_PIOC 8 AT91_PERIPH_A AT91_PINCTRL_NONE>,
+ <AT91_PIOC 8 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>,
<AT91_PIOC 9 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
@@ -346,7 +346,7 @@
usart1 {
pinctrl_usart1: usart1-0 {
atmel,pins =
- <AT91_PIOC 12 AT91_PERIPH_A AT91_PINCTRL_NONE>,
+ <AT91_PIOC 12 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>,
<AT91_PIOC 13 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
@@ -364,7 +364,7 @@
usart2 {
pinctrl_usart2: usart2-0 {
atmel,pins =
- <AT91_PIOC 14 AT91_PERIPH_A AT91_PINCTRL_NONE>,
+ <AT91_PIOC 14 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>,
<AT91_PIOC 15 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
diff --git a/arch/arm/boot/dts/at91sam9263.dtsi b/arch/arm/boot/dts/at91sam9263.dtsi
index af68a86c99731..745918b977860 100644
--- a/arch/arm/boot/dts/at91sam9263.dtsi
+++ b/arch/arm/boot/dts/at91sam9263.dtsi
@@ -437,7 +437,7 @@
usart0 {
pinctrl_usart0: usart0-0 {
atmel,pins =
- <AT91_PIOA 26 AT91_PERIPH_A AT91_PINCTRL_NONE
+ <AT91_PIOA 26 AT91_PERIPH_A AT91_PINCTRL_PULL_UP
AT91_PIOA 27 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
@@ -455,7 +455,7 @@
usart1 {
pinctrl_usart1: usart1-0 {
atmel,pins =
- <AT91_PIOD 0 AT91_PERIPH_A AT91_PINCTRL_NONE
+ <AT91_PIOD 0 AT91_PERIPH_A AT91_PINCTRL_PULL_UP
AT91_PIOD 1 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
@@ -473,7 +473,7 @@
usart2 {
pinctrl_usart2: usart2-0 {
atmel,pins =
- <AT91_PIOD 2 AT91_PERIPH_A AT91_PINCTRL_NONE
+ <AT91_PIOD 2 AT91_PERIPH_A AT91_PINCTRL_PULL_UP
AT91_PIOD 3 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
diff --git a/arch/arm/boot/dts/at91sam9g45.dtsi b/arch/arm/boot/dts/at91sam9g45.dtsi
index d16db1fa7e15c..ea80a5a127609 100644
--- a/arch/arm/boot/dts/at91sam9g45.dtsi
+++ b/arch/arm/boot/dts/at91sam9g45.dtsi
@@ -555,7 +555,7 @@
usart0 {
pinctrl_usart0: usart0-0 {
atmel,pins =
- <AT91_PIOB 19 AT91_PERIPH_A AT91_PINCTRL_NONE
+ <AT91_PIOB 19 AT91_PERIPH_A AT91_PINCTRL_PULL_UP
AT91_PIOB 18 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
@@ -573,7 +573,7 @@
usart1 {
pinctrl_usart1: usart1-0 {
atmel,pins =
- <AT91_PIOB 4 AT91_PERIPH_A AT91_PINCTRL_NONE
+ <AT91_PIOB 4 AT91_PERIPH_A AT91_PINCTRL_PULL_UP
AT91_PIOB 5 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
@@ -591,7 +591,7 @@
usart2 {
pinctrl_usart2: usart2-0 {
atmel,pins =
- <AT91_PIOB 6 AT91_PERIPH_A AT91_PINCTRL_NONE
+ <AT91_PIOB 6 AT91_PERIPH_A AT91_PINCTRL_PULL_UP
AT91_PIOB 7 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
@@ -609,7 +609,7 @@
usart3 {
pinctrl_usart3: usart3-0 {
atmel,pins =
- <AT91_PIOB 8 AT91_PERIPH_A AT91_PINCTRL_NONE
+ <AT91_PIOB 8 AT91_PERIPH_A AT91_PINCTRL_PULL_UP
AT91_PIOB 9 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
diff --git a/arch/arm/boot/dts/at91sam9rl.dtsi b/arch/arm/boot/dts/at91sam9rl.dtsi
index 8fb22030f00bc..ad495f5a5790f 100644
--- a/arch/arm/boot/dts/at91sam9rl.dtsi
+++ b/arch/arm/boot/dts/at91sam9rl.dtsi
@@ -681,7 +681,7 @@
usart0 {
pinctrl_usart0: usart0-0 {
atmel,pins =
- <AT91_PIOA 6 AT91_PERIPH_A AT91_PINCTRL_NONE>,
+ <AT91_PIOA 6 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>,
<AT91_PIOA 7 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
@@ -720,7 +720,7 @@
usart1 {
pinctrl_usart1: usart1-0 {
atmel,pins =
- <AT91_PIOA 11 AT91_PERIPH_A AT91_PINCTRL_NONE>,
+ <AT91_PIOA 11 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>,
<AT91_PIOA 12 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
@@ -743,7 +743,7 @@
usart2 {
pinctrl_usart2: usart2-0 {
atmel,pins =
- <AT91_PIOA 13 AT91_PERIPH_A AT91_PINCTRL_NONE>,
+ <AT91_PIOA 13 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>,
<AT91_PIOA 14 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
@@ -766,7 +766,7 @@
usart3 {
pinctrl_usart3: usart3-0 {
atmel,pins =
- <AT91_PIOB 0 AT91_PERIPH_A AT91_PINCTRL_NONE>,
+ <AT91_PIOB 0 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>,
<AT91_PIOB 1 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
};
--
2.20.1
next prev parent reply other threads:[~2020-02-14 17:10 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200214161147.15842-1-sashal@kernel.org>
2020-02-14 16:08 ` [PATCH AUTOSEL 4.19 081/252] arm64: dts: allwinner: H6: Add PMU mode Sasha Levin
2020-02-14 16:08 ` [PATCH AUTOSEL 4.19 082/252] arm: dts: allwinner: H3: Add PMU node Sasha Levin
2020-02-14 16:08 ` Sasha Levin [this message]
2020-02-14 16:09 ` [PATCH AUTOSEL 4.19 086/252] arm64: dts: qcom: msm8996: Disable USB2 PHY suspend by core Sasha Levin
2020-02-14 16:09 ` [PATCH AUTOSEL 4.19 088/252] ARM: dts: imx6: rdu2: Disable WP for USDHC2 and USDHC3 Sasha Levin
2020-02-14 16:09 ` [PATCH AUTOSEL 4.19 089/252] ARM: dts: imx6: rdu2: Limit USBH1 to Full Speed Sasha Levin
2020-02-14 16:09 ` [PATCH AUTOSEL 4.19 114/252] ARM: dts: r8a7779: Add device node for ARM global timer Sasha Levin
2020-02-14 16:09 ` [PATCH AUTOSEL 4.19 140/252] ARM: dts: stm32: Add power-supply for DSI panel on stm32f469-disco Sasha Levin
2020-02-14 16:10 ` [PATCH AUTOSEL 4.19 148/252] ARM: dts: at91: sama5d3: fix maximum peripheral clock rates Sasha Levin
2020-02-14 16:10 ` [PATCH AUTOSEL 4.19 149/252] ARM: dts: at91: sama5d3: define clock rate range for tcb1 Sasha Levin
2020-02-14 16:10 ` [PATCH AUTOSEL 4.19 164/252] ARC: [plat-axs10x]: Add missing multicast filter number to GMAC node Sasha Levin
2020-02-14 16:11 ` [PATCH AUTOSEL 4.19 210/252] ARM: dts: am43xx: add support for clkout1 clock Sasha Levin
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