kernel/Documentation/devicetree/bindings/serial/samsung_uart.yaml, branch linux-rolling-stable

dt-bindings: serial: samsung: add samsung,exynos8890-uart compatible

2025-10-22T10:04:33Z

Add dedicated samsung,exynos8890-uart compatible to the dt-schema for representing uart of the exynos8890. Like exynos8895, it has a required DT property samsung,uart-fifosize, so reuse support for it. Signed-off-by: Ivaylo Ivanov Acked-by: Rob Herring (Arm) Link: https://patch.msgid.link/20250914132201.2622955-1-ivo.ivanov.ivanov1@gmail.com Signed-off-by: Greg Kroah-Hartman

dt-bindings: serial: samsung: Add compatible for ARTPEC-9 SoC

2025-10-22T10:03:47Z

Add Axis ARTPEC-9 uart compatible to the bindings documentation. It is similar to the older samsung,exynos8895-uart design. Signed-off-by: Ravi Patel Acked-by: Conor Dooley Link: https://patch.msgid.link/20250918032703.8885-1-ravi.patel@samsung.com Signed-off-by: Greg Kroah-Hartman

dt-bindings: serial: samsung: add samsung,exynos2200-uart compatible

2025-07-24T09:40:30Z

Add dedicated samsung,exynos2200-uart compatible to the dt-schema for representing uart of the exynos2200. Like GS101, it has a required DT property samsung,uart-fifosize and exhibits the 32 bit register access limit, so reuse support for it. Signed-off-by: Ivaylo Ivanov Reviewed-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20250722120859.443283-1-ivo.ivanov.ivanov1@gmail.com Signed-off-by: Greg Kroah-Hartman

dt-bindings: serial: samsung: add exynos7870-uart compatible

2025-03-20T15:05:33Z

Document the compatible string for Exynos7870's UART driver. The devicetree property samsung,uart-fifosize must be mandatory, as the driver enquires about the FIFO sizes. This feature makes it compatible with Exynos8895's UART. Signed-off-by: Kaustabh Chakraborty Reviewed-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20250219-exynos7870-uart-v2-1-c8c67f3a936c@disroot.org Signed-off-by: Greg Kroah-Hartman

dt-bindings: serial: samsung: Add samsung,exynos8895-uart compatible

2024-11-04T01:02:42Z

Add dedicated samsung,exynos8895-uart compatible to the dt-schema for representing uart of the Exynos8895 SoC. Like GS101, it has a required DT property samsung,uart-fifosize, but it does not exhibit the 32 bit register access limit. Signed-off-by: Ivaylo Ivanov Reviewed-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20241023090902.538040-2-ivo.ivanov.ivanov1@gmail.com Signed-off-by: Greg Kroah-Hartman

dt-bindings: serial: samsung: fix maxItems for gs101

2024-07-31T10:34:30Z

While gs101 needs exactly two clocks for the UART, the schema doesn't currently limit the maximum number to this and instead the default of five from this schema is applied. Update the schema accordingly. Reviewed-by: Rob Herring (Arm) Signed-off-by: André Draszik Link: https://lore.kernel.org/r/20240725-gs101-uart-binding-v5-2-e237be8253a9@linaro.org Signed-off-by: Greg Kroah-Hartman

dt-bindings: serial: samsung: avoid duplicating permitted clock-names

2024-07-31T10:34:30Z

This binding currently duplicates the permitted clock-names in various places, and when adding more compatibles, clock-names will have to be duplicated even more. The reason is: 1) subschemas (-if: ...), still have to match the top-level: pattern: '^clk_uart_baud[0-3]$' 2) there is one compatible that doesn't follow sequential numbering for the clock names (samsung,s3c6400-uart) 3) when limiting the number of clock-names, we also want to enforce sequential names Because of 1) and 2), the patterns can not simply be changed to constant strings, and later overridden in a different subschema (for samsung,s3c6400-uart only). Since we can't populate the top-level clock-names based on the compatible, and because when limiting the number of items we generally want sequential numbers and not a pattern, move the permitted strings into a subschema of its own and populate it based on the compatible: * 'uart clk_uart_baud2 clk_uart_baud3' for the one outlier * 'uart clk_uart_baud0..3' for everything else This way we can avoid having to duplicate the permitted names everywhere. While at it, add blank lines as per the universal style, which is to have blank lines between properties, except where they are booleans. Also add another example using a compatible that uses the default clock-names scheme, as opposed to the existing example that uses samsung,s3c6400-uart's non-default clock-names. This allows testing both versions of the clock-names property when running dt_binding_check. Reviewed-by: Rob Herring (Arm) Signed-off-by: André Draszik Link: https://lore.kernel.org/r/20240725-gs101-uart-binding-v5-1-e237be8253a9@linaro.org Signed-off-by: Greg Kroah-Hartman

dt-bindings: serial: samsung: do not allow reg-io-width for gs101

2024-01-28T03:05:18Z

All gs101 serial ports are restricted to 32-bit register accesses. This requirement will be inferred from the compatible. Do not allow the reg-io-width property for the google,gs101-uart compatible. Suggested-by: Krzysztof Kozlowski Reviewed-by: Krzysztof Kozlowski Reviewed-by: Peter Griffin Signed-off-by: Tudor Ambarus Reviewed-by: Sam Protsenko Link: https://lore.kernel.org/r/20240119104526.1221243-3-tudor.ambarus@linaro.org Signed-off-by: Greg Kroah-Hartman

dt-bindings: serial: samsung: Make samsung,uart-fifosize a required property

2023-12-12T19:22:42Z

Specifying samsung,uart-fifosize in both DT and driver static data is error prone and relies on driver probe order and dt aliases to be correct. Additionally on many Exynos platforms these are (USI) universal serial interfaces which can be uart, spi or i2c, so it can change per board. For google,gs101-uart make samsung,uart-fifosize a required property. For this platform fifosize now *only* comes from DT. Reviewed-by: Sam Protsenko Signed-off-by: Peter Griffin Link: https://lore.kernel.org/r/20231211162331.435900-5-peter.griffin@linaro.org Signed-off-by: Krzysztof Kozlowski

dt-bindings: serial: samsung: Add google-gs101-uart compatible

2023-12-12T19:22:42Z

Add dedicated google-gs101-uart compatible to the dt-schema for representing uart of the Google Tensor gs101 SoC. Reviewed-by: Sam Protsenko Signed-off-by: Peter Griffin Link: https://lore.kernel.org/r/20231211162331.435900-4-peter.griffin@linaro.org Signed-off-by: Krzysztof Kozlowski