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MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: <20260529-zx29clk-v3-2-c7fe54ea388f@gmail.com> References: <20260529-zx29clk-v3-0-c7fe54ea388f@gmail.com> In-Reply-To: <20260529-zx29clk-v3-0-c7fe54ea388f@gmail.com> To: Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Philipp Zabel , Brian Masney Cc: linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, =?utf-8?q?Stefan_D=C3=B6singer?= X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=7298; i=stefandoesinger@gmail.com; h=from:subject:message-id; bh=vr13qCo1Z4urs64TigR5t4iRfx+iJfof5p91YFBaIKI=; b=owEBiQJ2/ZANAwAIAT0TvMhUTxoiAcsmYgBqGLmoLTbh1SJ5vFdLjU9/XR3vX1Cv6I7aYZsQB E/ku8D9EqyJAk8EAAEIADkWIQRDFvS2qgVbJ5UyXWw9E7zIVE8aIgUCahi5qBsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMiwyLDIACgkQPRO8yFRPGiLZhQ//e8cAqHfB9uyHXY6yqNXCDvbERSrzuLA arLGyljoZ1tXX6dH8yQH9DX4O+PFFfbjCoFVeOjSc9pYGdh3+Pxigtof/9p2K86+rel0rgjJ58W Or9w9ZABO3KWJEHCGvLbkNfLYnImLKjFpGucJnXM08piL88dIAiUyONBs4Nam9FKkYfA7Qnttye 1djJqJweXfhFivbUE8eA/NtWXDwZs3e1XCmrOwEdx7YgjbTihG5rY+6zLe9hNApY3cUzK4D8cz2 W85uhcofmXLWxdNHIILOrdhDzBsPX1d5b5YoHPeHHsnIYX9F+HGfsAP9yjJFZ8gXGAR/0hdzc9m SYede274khPLqvrLcpmvXJx+2+jckf7sUukRrG7O/p3Cqq3sKavAIzUI6oqHIBS9CDxQYFn8174 iyc/P0vMXSXCDwtZEarnETvXEO8/PhcfkU5eEA5WlI8jWcM75xkJ7A/A2M4QCN08/smXQLbcMA8 O6xo/bd1Waj96u7pdMT4Ra0sEzGQhc/qbBMdzEVvLW/j7lMKfTvwcYJmpDqAmbja1CnS6bWo4K2 A2GWb9TNhUOVHA/2MoM0ktMCoFjSEhd/ho1CjC9Stm7XY78NgzgFABLhcUaVScMtwXZjcCxnyyb 94gMSsB6fgJJREZ88BOx5HPwIIKH6bGWVryMcu87Xr2Og6N8roKg= X-Developer-Key: i=stefandoesinger@gmail.com; a=openpgp; fpr=4F9C2C8728019633893EBBB98CB81F9A72BBA155 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260528_145505_909332_9EA294CC X-CRM114-Status: GOOD ( 16.56 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The clock controller of the Low Speed Peripherals is relatively clean. One register per device with gates, muxes and resets and for some devices a divider. There are even bits in the top controller to control propagation of clock lines down to LSP. The clocks are sorted by register address and I am convinced that the list is complete. Signed-off-by: Stefan Dösinger --- .../bindings/clock/zte,zx297520v3-lspclk.yaml | 119 +++++++++++++++++++++ include/dt-bindings/clock/zte,zx297520v3-clk.h | 58 ++++++++++ 2 files changed, 177 insertions(+) diff --git a/Documentation/devicetree/bindings/clock/zte,zx297520v3-lspclk.yaml b/Documentation/devicetree/bindings/clock/zte,zx297520v3-lspclk.yaml new file mode 100644 index 000000000000..e4d50d40e834 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/zte,zx297520v3-lspclk.yaml @@ -0,0 +1,119 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/clock/zte,zx297520v3-lspclk.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ZTE zx297520v3 SoC LSP clock and reset controller + +maintainers: + - Stefan Dösinger + +description: | + This clock and reset controller controls low speed peripherals on the board. + This is a relatively isolated subsystem containing UART, I2C, I2S and SPI + devices. The clock controller is responsible for bringing the devices out of + reset and enabling their clocks as needed. + + The controller receives its clock signal from the top controller and need to + be declared as clock inputs. + + All available clocks are defined as preprocessor macros in the + 'dt-bindings/clock/zte,zx297520v3-clk.h' header. + +properties: + compatible: + const: zte,zx297520v3-lspclk + + clocks: + items: + - description: Main PLL divided by 5 output from topclk (124.8 MHz) + - description: Main PLL divided by 4 output from topclk (156 MHz) + - description: Main PLL divided by 6 output from topclk (104 MHz) + - description: Main PLL divided by 8 output from topclk (78 MHz) + - description: Main PLL divided by 12 output from topclk (52 MHz) + - description: Main oscillator output from topclk (26 MHz) + - description: Timer oscillator output from topclk (32 KHz) + - description: LSP pclk output from topclk (26 MHz) + - description: TDM wclk mux output from topclk + - description: DPLL divided by 4 output from topclk (122.88 MHz) + + clock-names: + items: + - const: mpll_d5 + - const: mpll_d4 + - const: mpll_d6 + - const: mpll_d8 + - const: mpll_d12 + - const: osc26m + - const: osc32k + - const: pclk + - const: tdm_wclk + - const: dpll_d4 + + "#clock-cells": + const: 1 + + "#reset-cells": + const: 1 + + reg: + items: + - description: IO memory region of the LSP controller + +required: + - compatible + - reg + - clocks + - clock-names + - '#clock-cells' + - '#reset-cells' + +additionalProperties: false + +examples: + - | + #include + + osc26m: osc26m { + compatible = "fixed-clock"; + clock-frequency = <26000000>; + #clock-cells = <0>; + }; + + osc32k: osc32k { + compatible = "fixed-clock"; + clock-frequency = <32768>; + #clock-cells = <0>; + }; + + topclk: clk@13b000 { + compatible = "zte,zx297520v3-topclk"; + reg = <0x0013b000 0x400>, + <0x01306000 0x400>; + reg-names = "top", "matrix"; + #clock-cells = <1>; + #reset-cells = <1>; + clocks = <&osc26m>, <&osc32k>; + clock-names = "osc26m", "osc32k"; + }; + + lspclk: lspclk@1400000 { + compatible = "zte,zx297520v3-lspclk"; + reg = <0x01400000 0x100>; + #clock-cells = <1>; + #reset-cells = <1>; + + clocks = <&topclk ZX297520V3_LSP_MPLL_D5_WCLK>, + <&topclk ZX297520V3_LSP_MPLL_D4_WCLK>, + <&topclk ZX297520V3_LSP_MPLL_D6_WCLK>, + <&topclk ZX297520V3_LSP_MPLL_D8_WCLK>, + <&topclk ZX297520V3_LSP_MPLL_D12_WCLK>, + <&topclk ZX297520V3_LSP_OSC26M_WCLK>, + <&topclk ZX297520V3_LSP_OSC32K_WCLK>, + <&topclk ZX297520V3_LSP_PCLK>, + <&topclk ZX297520V3_LSP_TDM_WCLK>, + <&topclk ZX297520V3_LSP_DPLL_D4_WCLK>; + clock-names = "mpll_d5", "mpll_d4", "mpll_d6", "mpll_d8", "mpll_d12", + "osc26m", "osc32k", "pclk", "tdm_wclk", "dpll_d4"; + }; diff --git a/include/dt-bindings/clock/zte,zx297520v3-clk.h b/include/dt-bindings/clock/zte,zx297520v3-clk.h index 4d85251a0ce5..144a3b064d49 100644 --- a/include/dt-bindings/clock/zte,zx297520v3-clk.h +++ b/include/dt-bindings/clock/zte,zx297520v3-clk.h @@ -118,4 +118,62 @@ #define ZX297520V3_DMA_RESET 28 #define ZX297520V3_TOPRST_END 29 +#define ZX297520V3_TIMER_L1_WCLK 0 +#define ZX297520V3_TIMER_L1_PCLK 1 +#define ZX297520V3_WDT_L2_WCLK 2 +#define ZX297520V3_WDT_L2_PCLK 3 +#define ZX297520V3_WDT_L3_WCLK 4 +#define ZX297520V3_WDT_L3_PCLK 5 +#define ZX297520V3_I2C1_WCLK 6 +#define ZX297520V3_I2C1_PCLK 7 +#define ZX297520V3_I2S0_WCLK 8 +#define ZX297520V3_I2S0_PCLK 9 +#define ZX297520V3_I2S1_WCLK 10 +#define ZX297520V3_I2S1_PCLK 11 +#define ZX297520V3_QSPI_WCLK 12 +#define ZX297520V3_QSPI_PCLK 13 +#define ZX297520V3_UART1_WCLK 14 +#define ZX297520V3_UART1_PCLK 15 +#define ZX297520V3_I2C2_WCLK 16 +#define ZX297520V3_I2C2_PCLK 17 +#define ZX297520V3_SPI0_WCLK 18 +#define ZX297520V3_SPI0_PCLK 19 +#define ZX297520V3_TIMER_LB_WCLK 20 +#define ZX297520V3_TIMER_LB_PCLK 21 +#define ZX297520V3_TIMER_LC_WCLK 22 +#define ZX297520V3_TIMER_LC_PCLK 23 +#define ZX297520V3_UART2_WCLK 24 +#define ZX297520V3_UART2_PCLK 25 +#define ZX297520V3_WDT_LE_WCLK 26 +#define ZX297520V3_WDT_LE_PCLK 27 +#define ZX297520V3_TIMER_LF_WCLK 28 +#define ZX297520V3_TIMER_LF_PCLK 29 +#define ZX297520V3_SPI1_WCLK 30 +#define ZX297520V3_SPI1_PCLK 31 +#define ZX297520V3_TIMER_L11_WCLK 32 +#define ZX297520V3_TIMER_L11_PCLK 33 +#define ZX297520V3_TDM_WCLK 34 +#define ZX297520V3_TDM_PCLK 35 +#define ZX297520V3_LSPCLK_END 36 + +#define ZX297520V3_TIMER_L1_RESET 0 +#define ZX297520V3_WDT_L2_RESET 1 +#define ZX297520V3_WDT_L3_RESET 2 +#define ZX297520V3_I2C1_RESET 3 +#define ZX297520V3_I2S0_RESET 4 +#define ZX297520V3_I2S1_RESET 5 +#define ZX297520V3_QSPI_RESET 6 +#define ZX297520V3_UART1_RESET 7 +#define ZX297520V3_I2C2_RESET 8 +#define ZX297520V3_SPI0_RESET 9 +#define ZX297520V3_TIMER_LB_RESET 10 +#define ZX297520V3_TIMER_LC_RESET 11 +#define ZX297520V3_UART2_RESET 12 +#define ZX297520V3_WDT_LE_RESET 13 +#define ZX297520V3_TIMER_LF_RESET 14 +#define ZX297520V3_SPI1_RESET 15 +#define ZX297520V3_TIMER_L11_RESET 16 +#define ZX297520V3_TDM_RESET 17 +#define ZX297520V3_LSPRST_END 18 + #endif /* __DT_BINDINGS_CLOCK_ZX297520V3_H */ -- 2.53.0