From: Tudor Ambarus <tudor.ambarus@linaro.org>
To: broonie@kernel.org, robh@kernel.org, andi.shyti@kernel.org,
krzysztof.kozlowski@linaro.org, semen.protsenko@linaro.org,
conor+dt@kernel.org
Cc: alim.akhtar@samsung.com, linux-spi@vger.kernel.org,
linux-samsung-soc@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, andre.draszik@linaro.org,
peter.griffin@linaro.org, kernel-team@android.com,
willmcvicker@google.com, devicetree@vger.kernel.org,
Tudor Ambarus <tudor.ambarus@linaro.org>
Subject: [PATCH v3 01/12] spi: dt-bindings: introduce FIFO depth properties
Date: Fri, 16 Feb 2024 07:05:44 +0000 [thread overview]
Message-ID: <20240216070555.2483977-2-tudor.ambarus@linaro.org> (raw)
In-Reply-To: <20240216070555.2483977-1-tudor.ambarus@linaro.org>
There are SPI IPs that can be configured by the integrator with a
specific FIFO depth depending on the system's capabilities. For example,
the samsung USI SPI IP can be configured by the integrator with a TX/RX
FIFO from 8 byte to 256 bytes.
Introduce the ``fifo-depth`` property for such instances of IPs where the
same FIFO depth is used for both RX and TX. Introduce ``rx-fifo-depth``
and ``tx-fifo-depth`` properties for cases where the RX FIFO depth is
different from the TX FIFO depth.
Make the dedicated RX/TX properties dependent on each other and mutual
exclusive with the other.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
---
.../bindings/spi/spi-controller.yaml | 27 +++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/Documentation/devicetree/bindings/spi/spi-controller.yaml b/Documentation/devicetree/bindings/spi/spi-controller.yaml
index 524f6fe8c27b..093150c0cb87 100644
--- a/Documentation/devicetree/bindings/spi/spi-controller.yaml
+++ b/Documentation/devicetree/bindings/spi/spi-controller.yaml
@@ -69,6 +69,21 @@ properties:
Should be generally avoided and be replaced by
spi-cs-high + ACTIVE_HIGH.
+ fifo-depth:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ Size of the RX and TX data FIFOs in bytes.
+
+ rx-fifo-depth:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ Size of the RX data FIFO in bytes.
+
+ tx-fifo-depth:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ Size of the TX data FIFO in bytes.
+
num-cs:
$ref: /schemas/types.yaml#/definitions/uint32
description:
@@ -116,6 +131,10 @@ patternProperties:
- compatible
- reg
+dependencies:
+ rx-fifo-depth: [ tx-fifo-depth ]
+ tx-fifo-depth: [ rx-fifo-depth ]
+
allOf:
- if:
not:
@@ -129,6 +148,14 @@ allOf:
properties:
"#address-cells":
const: 0
+ - not:
+ required:
+ - fifo-depth
+ - rx-fifo-depth
+ - not:
+ required:
+ - fifo-depth
+ - tx-fifo-depth
additionalProperties: true
--
2.44.0.rc0.258.g7320e95886-goog
next prev parent reply other threads:[~2024-02-16 7:06 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-16 7:05 [PATCH v3 00/12] spi: s3c64xx: remove OF alias ID dependency Tudor Ambarus
2024-02-16 7:05 ` Tudor Ambarus [this message]
2024-02-16 19:45 ` [PATCH v3 01/12] spi: dt-bindings: introduce FIFO depth properties Conor Dooley
2024-02-16 7:05 ` [PATCH v3 02/12] spi: s3c64xx: define a magic value Tudor Ambarus
2024-02-16 7:05 ` [PATCH v3 03/12] spi: s3c64xx: allow full FIFO masks Tudor Ambarus
2024-02-16 7:05 ` [PATCH v3 04/12] spi: s3c64xx: determine the fifo depth only once Tudor Ambarus
2024-02-16 7:05 ` [PATCH v3 05/12] spi: s3c64xx: retrieve the FIFO depth from the device tree Tudor Ambarus
2024-02-16 7:05 ` [PATCH v3 06/12] spi: s3c64xx: allow FIFO depth to be determined from the compatible Tudor Ambarus
2024-02-16 7:05 ` [PATCH v3 07/12] spi: s3c64xx: let the SPI core determine the bus number Tudor Ambarus
2024-02-16 7:05 ` [PATCH v3 08/12] spi: s3c64xx: introduce s3c64xx_spi_set_port_id() Tudor Ambarus
2024-02-16 7:05 ` [PATCH v3 09/12] spi: s3c64xx: get rid of the OF alias ID dependency Tudor Ambarus
2024-02-16 7:05 ` [PATCH v3 10/12] spi: s3c64xx: deprecate fifo_lvl_mask, rx_lvl_offset and port_id Tudor Ambarus
2024-02-16 7:05 ` [PATCH v3 11/12] spi: s3c64xx: switch gs101 to new port config data Tudor Ambarus
2024-02-16 7:05 ` [PATCH v3 12/12] spi: s3c64xx: switch exynos850 " Tudor Ambarus
2024-02-21 17:56 ` Tudor Ambarus
2024-02-24 23:59 ` Sam Protsenko
2024-03-06 14:08 ` [PATCH v3 00/12] spi: s3c64xx: remove OF alias ID dependency Mark Brown
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