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/Linux-v6.1/Documentation/devicetree/bindings/serial/
Dst,stm32-uart.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/serial/st,stm32-uart.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
8 - Erwan Le Ray <erwan.leray@foss.st.com>
15 - st,stm32-uart
16 - st,stm32f7-uart
17 - st,stm32h7-uart
32 description: label associated with this uart
34 st,hw-flow-ctrl:
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/Linux-v6.1/arch/arm/boot/dts/
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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Dstm32mp151.dtsi1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
3 * Copyright (C) STMicroelectronics 2017 - All Rights Reserved
6 #include <dt-bindings/interrupt-controller/arm-gic.h>
7 #include <dt-bindings/clock/stm32mp1-clks.h>
8 #include <dt-bindings/reset/stm32mp1-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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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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/Linux-v6.1/arch/arm/
DKconfig.debug1 # SPDX-License-Identifier: GPL-2.0
44 once the kernel has booted up - it's a one time check.
107 1 - undefined instruction events
108 2 - system calls
109 4 - invalid data aborts
110 8 - SIGSEGV faults
111 16 - SIGBUS faults
115 bool "Kernel low-level debugging functions (read help!)"
123 UART definition, as specified below. Attempting to boot the kernel
128 prompt "Kernel low-level debugging port"
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/Linux-v6.1/drivers/tty/serial/
Dstm32-usart.c1 // SPDX-License-Identifier: GPL-2.0
9 * Inspired by st-asc.c from STMicroelectronics (c)
15 #include <linux/dma-direction.h>
17 #include <linux/dma-mapping.h>
36 #include "stm32-usart.h"
120 val = readl_relaxed(port->membase + reg); in stm32_usart_set_bits()
122 writel_relaxed(val, port->membase + reg); in stm32_usart_set_bits()
129 val = readl_relaxed(port->membase + reg); in stm32_usart_clr_bits()
131 writel_relaxed(val, port->membase + reg); in stm32_usart_clr_bits()
137 const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs; in stm32_usart_tx_empty()
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