From: <sean.wang@mediatek.com>
To: robh+dt@kernel.org, mark.rutland@arm.com, marcel@holtmann.org,
johan.hedberg@gmail.com
Cc: devicetree@vger.kernel.org, linux-bluetooth@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
Sean Wang <sean.wang@mediatek.com>
Subject: [PATCH v1 1/4] dt-bindings: net: bluetooth: add boot-gpios property to UART-based device
Date: Sun, 2 Jun 2019 09:04:14 +0800 [thread overview]
Message-ID: <1559437457-26766-2-git-send-email-sean.wang@mediatek.com> (raw)
In-Reply-To: <1559437457-26766-1-git-send-email-sean.wang@mediatek.com>
From: Sean Wang <sean.wang@mediatek.com>
Not every platform has the pinctrl device integrates the GPIO the function
such as MT7621 whose pinctrl and GPIO are separate hardware so adding an
additional boot-gpios property for such platform allows them to bring up
the device.
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
---
.../devicetree/bindings/net/mediatek-bluetooth.txt | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/Documentation/devicetree/bindings/net/mediatek-bluetooth.txt b/Documentation/devicetree/bindings/net/mediatek-bluetooth.txt
index 41a7dcc80f5b..14f23b354a6d 100644
--- a/Documentation/devicetree/bindings/net/mediatek-bluetooth.txt
+++ b/Documentation/devicetree/bindings/net/mediatek-bluetooth.txt
@@ -50,11 +50,24 @@ Required properties:
"mediatek,mt7663u-bluetooth": for MT7663U device
"mediatek,mt7668u-bluetooth": for MT7668U device
- vcc-supply: Main voltage regulator
+
+If the pin controller on the platform can support both pinmux and GPIO
+control such as the most of MediaTek platform. Please use below properties.
+
- pinctrl-names: Should be "default", "runtime"
- pinctrl-0: Should contain UART RXD low when the device is powered up to
enter proper bootstrap mode.
- pinctrl-1: Should contain UART mode pin ctrl
+Else, the pin controller on the platform only can support pinmux control and
+the GPIO control still has to rely on the dedicated GPIO controller such as
+a legacy MediaTek SoC, MT7621. Please use the below properties.
+
+- boot-gpios: GPIO same to the pin as UART RXD and used to keep LOW when
+ the device is powered up to enter proper bootstrap mode when
+- pinctrl-names: Should be "default"
+- pinctrl-0: Should contain UART mode pin ctrl
+
Optional properties:
- reset-gpios: GPIO used to reset the device whose initial state keeps low,
--
2.17.1
next prev parent reply other threads:[~2019-06-02 1:04 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-02 1:04 [PATCH v1 0/4] add boot-gpios and clock property to btmtkuart sean.wang
2019-06-02 1:04 ` sean.wang [this message]
2019-06-02 1:04 ` [PATCH v1 2/4] dt-bindings: net: bluetooth: add clock property to UART-based device sean.wang
2019-06-02 1:04 ` [PATCH v1 3/4] Bluetooth: btmtkuart: add an implementation for boot-gpios property sean.wang
2019-06-02 1:04 ` [PATCH v1 4/4] Bluetooth: btmtkuart: add an implementation for clock osc property sean.wang
2019-07-06 11:01 ` [PATCH v1 0/4] add boot-gpios and clock property to btmtkuart Marcel Holtmann
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