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From: Neil Armstrong <narmstrong@baylibre.com>
To: ulf.hansson@linaro.org, khilman@baylibre.com, devicetree@vger.kernel.org
Cc: baylibre-upstreaming@groups.io,
	Neil Armstrong <narmstrong@baylibre.com>,
	linux-mmc@vger.kernel.org, linux-amlogic@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 1/3] dt-bindings: mmc: meson-gx: add ddr-access-quirk property
Date: Mon, 13 May 2019 11:15:46 +0200	[thread overview]
Message-ID: <20190513091548.16674-2-narmstrong@baylibre.com> (raw)
In-Reply-To: <20190513091548.16674-1-narmstrong@baylibre.com>

On the Amlogic G12A SoC family, (only) the SDIO controller has a bug which
makes any DDR access from the MMC controller fail.

Add the amlogic,ddr-access-quirk property so signal this particular
controller has this bug and needs a quirk to work properly.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 Documentation/devicetree/bindings/mmc/amlogic,meson-gx.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/amlogic,meson-gx.txt b/Documentation/devicetree/bindings/mmc/amlogic,meson-gx.txt
index 13e70409e8ac..f8914dab06c6 100644
--- a/Documentation/devicetree/bindings/mmc/amlogic,meson-gx.txt
+++ b/Documentation/devicetree/bindings/mmc/amlogic,meson-gx.txt
@@ -22,6 +22,10 @@ Required properties:
   clock rate requested by the MMC core.
 - resets     : phandle of the internal reset line
 
+Optional properties:
+- amlogic,ddr-access-quirk: set when HW cannot access the DDR memory, like on
+  the G12A SDIO controller.
+
 Example:
 
 	sd_emmc_a: mmc@70000 {
-- 
2.21.0


  reply	other threads:[~2019-05-13  9:16 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-13  9:15 [PATCH 0/3] mmc: meson-gx: add ddr-access-quirk support Neil Armstrong
2019-05-13  9:15 ` Neil Armstrong [this message]
2019-05-14 17:50   ` [PATCH 1/3] dt-bindings: mmc: meson-gx: add ddr-access-quirk property Martin Blumenstingl
2019-05-15 12:43     ` Neil Armstrong
2019-05-15 11:37   ` Ulf Hansson
2019-05-15 12:43     ` Neil Armstrong
2019-05-13  9:15 ` [PATCH 2/3] mmc: meson-gx: add ddr-access-quirk Neil Armstrong
2019-05-13 17:47   ` Kevin Hilman
2019-05-14 17:58   ` Martin Blumenstingl
2019-05-15 12:45     ` Neil Armstrong
2019-05-15 21:18       ` Martin Blumenstingl
2019-05-16  9:09         ` Neil Armstrong
2019-05-15 11:34   ` Ulf Hansson
2019-05-15 12:51     ` Neil Armstrong
2019-05-13  9:15 ` [PATCH 3/3] arm64: dts: meson-g12a: add ddr-access-quirk property to SDIO controller Neil Armstrong
2019-05-14 17:51   ` Martin Blumenstingl
2019-05-13  9:58 ` [PATCH 0/3] mmc: meson-gx: add ddr-access-quirk support Jerome Brunet
2019-05-13 11:28   ` Jerome Brunet
2019-05-14  9:14 ` [baylibre-upstreaming] " guillaume La Roque

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