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/linux/Documentation/devicetree/bindings/dma/stm32/
H A Dst,stm32-mdma.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/dma/stm32/st,stm32-mdma.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: STMicroelectronics STM32 MDMA Controller
10 The STM32 MDMA is a general-purpose direct memory access controller capable of
12 DMA clients connected to the STM32 MDMA controller must use the format
13 described in the dma.txt file, using a five-cell specifier for each channel:
14 a phandle to the MDMA controller plus the following five integer cells:
22 -bit 0-1: Source increment mode
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/linux/Documentation/devicetree/bindings/spi/
H A Dst,stm32-spi.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/spi/st,stm32-spi.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 the Serial Peripheral Interface. It supports full-duplex, half-duplex and
13 from 4 to 32-bit data size.
16 - Erwan Leray <erwan.leray@foss.st.com>
17 - Fabrice Gasnier <fabrice.gasnier@foss.st.com>
20 - $ref: spi-controller.yaml#
21 - if:
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/linux/arch/arm/boot/dts/st/
H A Dstm32mp131.dtsi1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
3 * Copyright (C) STMicroelectronics 2021 - All Rights Reserved
6 #include <dt-bindings/interrupt-controller/arm-gic.h>
7 #include <dt-bindings/clock/stm32mp13-clks.h>
8 #include <dt-bindings/reset/stm32mp13-resets.h>
11 #address-cells = <1>;
12 #size-cells = <1>;
15 #address-cells = <1>;
16 #size-cells = <0>;
19 compatible = "arm,cortex-a7";
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H A Dstm32h743.dtsi2 * Copyright 2017 - Alexandre Torgue <alexandre.torgue@st.com>
4 * This file is dual-licensed: you can use it either under the terms
43 #include "../armv7-m.dtsi"
44 #include <dt-bindings/clock/stm32h7-clks.h>
45 #include <dt-bindings/mfd/stm32h7-rcc.h>
46 #include <dt-bindings/interrupt-controller/irq.h>
49 #address-cells = <1>;
50 #size-cells = <1>;
53 clk_hse: clk-hse {
54 #clock-cells = <0>;
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/linux/Documentation/arch/arm/stm32/
H A Dstm32-dma-mdma-chaining.rst1 .. SPDX-License-Identifier: GPL-2.0
4 STM32 DMA-MDMA chaining
9 ------------
11 This document describes the STM32 DMA-MDMA chaining feature. But before going
17 STM32MP1 SoCs embed both STM32 DMA and STM32 MDMA controllers. STM32 DMA
33 **STM32 MDMA**
35 STM32 MDMA (Master DMA) is mainly used to manage direct data transfers between
38 interfaces for AHB peripherals, while the STM32 MDMA acts as a second level
39 DMA with better performance. As a AXI/AHB master, STM32 MDMA can take control
44 ----------
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/linux/drivers/spi/
H A Dspi-stm32.c1 // SPDX-License-Identifier: GPL-2.0
5 // Copyright (C) 2017, STMicroelectronics - All Rights Reserved
12 #include <linux/dma-mapping.h>
87 /* STM32H7 SPI registers */
176 /* STM32H7 SPI Master Baud Rate min/max divisor */
180 /* STM32H7 SPI Communication mode */
202 #define STM32_SPI_HOST_MODE(stm32_spi) (!(stm32_spi)->device_mode)
203 #define STM32_SPI_DEVICE_MODE(stm32_spi) ((stm32_spi)->device_mode)
206 * struct stm32_spi_reg - stm32 SPI register & bitfield desc
218 * struct stm32_spi_regspec - stm32 registers definition, compatible dependent data
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/linux/drivers/dma/stm32/
H A Dstm32-mdma.c1 // SPDX-License-Identifier: GPL-2.0-only
6 * Pierre-Yves Mordret <pierre-yves.mordret@st.com>
8 * Driver for STM32 MDMA controller
10 * Inspired by stm32-dma.c and dma-jz4780.c
17 #include <linux/dma-mapping.h>
33 #include "../virt-dma.h"
35 #define STM32_MDMA_GISR0 0x0000 /* MDMA Int Status Reg 1 */
37 /* MDMA Channel x interrupt/status register */
46 /* MDMA Channel x interrupt flag clear register */
59 /* MDMA Channel x error status register */
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/linux/drivers/clk/
H A Dclk-stm32h7.c1 // SPDX-License-Identifier: GPL-2.0
8 #include <linux/clk-provider.h>
18 #include <dt-bindings/clock/stm32h7-clks.h>
139 /* Micro-controller output clock parent */
178 bit_status = !(readl(gate->reg) & BIT(rgate->bit_rdy)); in ready_gate_clk_enable()
183 } while (bit_status && --timeout); in ready_gate_clk_enable()
201 bit_status = !!(readl(gate->reg) & BIT(rgate->bit_rdy)); in ready_gate_clk_disable()
206 } while (bit_status && --timeout); in ready_gate_clk_disable()
227 return ERR_PTR(-ENOMEM); in clk_register_ready_gate()
235 rgate->bit_rdy = bit_rdy; in clk_register_ready_gate()
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