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Wed, 12 Feb 2025 23:38:37 -0800 (PST) Message-ID: <40370a0e-775b-42e3-bb6c-8cacaa0482cf@linaro.org> Date: Thu, 13 Feb 2025 07:38:35 +0000 Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 3/3] arm64: dts: exynos990: define all PERIC USI nodes To: Denzeel Oliva , gregkh@linuxfoundation.org, jirislaby@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, alim.akhtar@samsung.com, semen.protsenko@linaro.org, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org References: <20250212234034.284-1-wachiturroxd150@gmail.com> <20250212234034.284-4-wachiturroxd150@gmail.com> Content-Language: en-US From: Tudor Ambarus In-Reply-To: <20250212234034.284-4-wachiturroxd150@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 2/12/25 11:40 PM, Denzeel Oliva wrote: > Universal Serial Interface (USI) supports three types of serial interface > such as Universal Asynchronous Receiver and Transmitter (UART), Serial > Peripheral Interface (SPI), and Inter-Integrated Circuit (I2C). > Each protocols can be working independently and configured as one of > those using external configuration inputs. > > Exynos990 SoC defines 18 USI nodes in PERIC0/1 blocks. > Nodes have different depths from 64-256 bytes. for the reviewer's peace of mind you shall specify whether you tested at least an i2c, uart and spi node. > > Signed-off-by: Denzeel Oliva > --- > arch/arm64/boot/dts/exynos/exynos990.dtsi | 1693 +++++++++++++++++++++ > 1 file changed, 1693 insertions(+) > > diff --git a/arch/arm64/boot/dts/exynos/exynos990.dtsi b/arch/arm64/boot/dts/exynos/exynos990.dtsi > index aa056fdae..22ec92a45 100644 > --- a/arch/arm64/boot/dts/exynos/exynos990.dtsi > +++ b/arch/arm64/boot/dts/exynos/exynos990.dtsi > @@ -7,6 +7,7 @@ > > #include > #include > +#include > > / { > compatible = "samsung,exynos990"; > @@ -248,6 +249,808 @@ sysreg_peric0: syscon@10420000 { > clocks = <&cmu_peric0 CLK_GOUT_PERIC0_SYSREG_PCLK>; > }; > > + usi_uart: usi@105400c0 { > + compatible = "samsung,exynos990-usi", "samsung,exynos850-usi"; > + reg = <0x105400c0 0x20>; > + samsung,sysreg = <&sysreg_peric0 0x1000>; > + samsung,mode = ; > + #address-cells = <1>; > + #size-cells = <1>; > + ranges; > + clocks = <&cmu_peric0 CLK_GOUT_PERIC0_TOP0_PCLK_4>, > + <&cmu_peric0 CLK_GOUT_PERIC0_TOP0_IPCLK_4>; > + clock-names = "pclk", "ipclk"; > + status = "disabled"; > + > + serial_0: serial@10540000 { > + compatible = "samsung,exynos990-uart", > + "samsung,exynos8895-uart"; > + reg = <0x10540000 0xc0>; > + interrupts = ; > + pinctrl-names = "default"; > + pinctrl-0 = <&uart0_bus>; > + clocks = <&cmu_peric0 CLK_GOUT_PERIC0_TOP0_PCLK_4>, > + <&cmu_peric0 CLK_GOUT_PERIC0_TOP0_IPCLK_4>; > + clock-names = "uart", "clk_uart_baud0"; > + samsung,uart-fifosize = <256>; > + status = "disabled"; node properties shall be specified in a specific order. Follow similar nodes that are already accepted, gs101 is one. > + }; > + }; > + > + usi0: usi@105500c0 { cut > + > + hsi2c_0: i2c@10550000 { cut > + > + spi_0: spi@10550000 { cut > + serial_2: serial@10550000 { why not serial_0 since you're in USI0. > + }; > + > + usi_i2c_0: usi@105600c0 { > + compatible = "samsung,exynos990-usi", "samsung,exynos850-usi"; > + reg = <0x105600c0 0x20>; > + samsung,sysreg = <&sysreg_peric0 0x1008>; > + samsung,mode = ; > + #address-cells = <1>; > + #size-cells = <1>; > + ranges; > + clocks = <&cmu_peric0 CLK_GOUT_PERIC0_TOP0_PCLK_6>, > + <&cmu_peric0 CLK_GOUT_PERIC0_TOP0_IPCLK_6>; > + clock-names = "pclk", "ipclk"; > + status = "disabled"; > + > + hsi2c_1: i2c@10560000 { > + compatible = "samsung,exynos990-hsi2c", > + "samsung,exynosautov9-hsi2c"; > + reg = <0x10560000 0xc0>; > + interrupts = ; > + pinctrl-names = "default"; > + pinctrl-0 = <&hsi2c1_bus>; > + clocks = <&cmu_peric0 CLK_GOUT_PERIC0_TOP0_IPCLK_6>, > + <&cmu_peric0 CLK_GOUT_PERIC0_TOP0_PCLK_6>; > + clock-names = "hsi2c", "hsi2c_pclk"; > + #address-cells = <1>; > + #size-cells = <0>; > + status = "disabled"; > + }; shouldn't you define serial and SPI too? > + }; > + cut > + spi_8: spi@108e0000 { > + compatible = "samsung,exynos990-spi"; > + reg = <0x108e0000 0x30>; > + interrupts = ; > + pinctrl-names = "default"; > + pinctrl-0 = <&spi8_bus>; > + clocks = <&cmu_peric1 CLK_GOUT_PERIC1_TOP0_PCLK_14>, > + <&cmu_peric1 CLK_GOUT_PERIC1_TOP0_IPCLK_14>; > + clock-names = "spi", "spi_busclk0"; > + #address-cells = <1>; > + #size-cells = <0>; > + fifo-depth = <256>; that's a first. Does downstream define any SPI node with 256 bytes FIFOs? Would you please point me to the downstream sources? Cheers, ta