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From:   Conor Dooley <mail@conchuod.ie>
To:     Daire McNamara <daire.mcnamara@microchip.com>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Greentime Hu <greentime.hu@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Lorenzo Pieralisi <lpieralisi@kernel.org>,
        Conor Dooley <conor.dooley@microchip.com>
Cc:     linux-pci@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org
Subject: [PATCH v3 6/7] riscv: dts: microchip: mpfs: remove bogus card-detect-delay
Date:   Sat, 20 Aug 2022 00:14:15 +0100
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From: Conor Dooley <conor.dooley@microchip.com>

Recent versions of dt-schema warn about a previously undetected
undocumented property:
arch/riscv/boot/dts/microchip/mpfs-icicle-kit.dtb: mmc@20008000: Unevaluated properties are not allowed ('card-detect-delay' was unexpected)
        From schema: Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml

There are no GPIOs connected to MSSIO6B4 pin K3 so adding the common
cd-debounce-delay-ms property makes no sense. The Cadence IP has a
register that sets the card detect delay as "DP * tclk". On MPFS, this
clock frequency is not configurable (it must be 200 MHz) & the FPGA
comes out of reset with this register already set.

Fixes: bc47b2217f24 ("riscv: dts: microchip: add the sundance polarberry")
Fixes: 0fa6107eca41 ("RISC-V: Initial DTS for Microchip ICICLE board")
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
v2022.08 or later of dt-schema is required.
---
 arch/riscv/boot/dts/microchip/mpfs-icicle-kit.dts | 1 -
 arch/riscv/boot/dts/microchip/mpfs-polarberry.dts | 1 -
 2 files changed, 2 deletions(-)

diff --git a/arch/riscv/boot/dts/microchip/mpfs-icicle-kit.dts b/arch/riscv/boot/dts/microchip/mpfs-icicle-kit.dts
index ee548ab61a2a..f3f87ed2007f 100644
--- a/arch/riscv/boot/dts/microchip/mpfs-icicle-kit.dts
+++ b/arch/riscv/boot/dts/microchip/mpfs-icicle-kit.dts
@@ -100,7 +100,6 @@ &mmc {
 	disable-wp;
 	cap-sd-highspeed;
 	cap-mmc-highspeed;
-	card-detect-delay = <200>;
 	mmc-ddr-1_8v;
 	mmc-hs200-1_8v;
 	sd-uhs-sdr12;
diff --git a/arch/riscv/boot/dts/microchip/mpfs-polarberry.dts b/arch/riscv/boot/dts/microchip/mpfs-polarberry.dts
index dc11bb8fc833..c87cc2d8fe29 100644
--- a/arch/riscv/boot/dts/microchip/mpfs-polarberry.dts
+++ b/arch/riscv/boot/dts/microchip/mpfs-polarberry.dts
@@ -70,7 +70,6 @@ &mmc {
 	disable-wp;
 	cap-sd-highspeed;
 	cap-mmc-highspeed;
-	card-detect-delay = <200>;
 	mmc-ddr-1_8v;
 	mmc-hs200-1_8v;
 	sd-uhs-sdr12;
-- 
2.37.1