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/linux-6.14.4/Documentation/devicetree/bindings/serial/
Dbrcm,bcm2835-aux-uart.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/serial/brcm,bcm2835-aux-uart.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: BCM2835 AUXILIARY UART
10 - Pratik Farkase <[email protected]>
11 - Florian Fainelli <[email protected]>
12 - Stefan Wahren <[email protected]>
15 - $ref: serial.yaml
19 const: brcm,bcm2835-aux-uart
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/linux-6.14.4/Documentation/devicetree/bindings/clock/
Dbrcm,bcm2835-aux-clock.txt1 Broadcom BCM2835 auxiliary peripheral support
4 Documentation/devicetree/bindings/clock/clock-bindings.txt
6 The auxiliary peripherals (UART, SPI1, and SPI2) have a small register
11 - compatible: Should be "brcm,bcm2835-aux"
12 - #clock-cells: Should be <1>. The permitted clock-specifier values can be
13 found in include/dt-bindings/clock/bcm2835-aux.h
14 - reg: Specifies base physical address and size of the registers
15 - clocks: The parent clock phandle
20 compatible = "brcm,bcm2835-cprman";
21 #clock-cells = <1>;
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/linux-6.14.4/drivers/tty/serial/8250/
D8250_bcm2835aux.c1 // SPDX-License-Identifier: GPL-2.0
3 * Serial port driver for BCM2835AUX UART
10 * The bcm2835aux is capable of RTS auto flow-control, but this driver doesn't
38 * struct bcm2835aux_data - driver private data of BCM2835 auxiliary UART
51 if (!(up->port.rs485.flags & SER_RS485_RX_DURING_TX)) { in bcm2835aux_rs485_start_tx()
52 struct bcm2835aux_data *data = dev_get_drvdata(up->port.dev); in bcm2835aux_rs485_start_tx()
54 data->cntl &= ~BCM2835_AUX_UART_CNTL_RXEN; in bcm2835aux_rs485_start_tx()
55 serial_out(up, BCM2835_AUX_UART_CNTL, data->cntl); in bcm2835aux_rs485_start_tx()
60 * flags besides RTS. So no need for a read-modify-write. in bcm2835aux_rs485_start_tx()
62 if (up->port.rs485.flags & SER_RS485_RTS_ON_SEND) in bcm2835aux_rs485_start_tx()
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/linux-6.14.4/arch/arm/boot/dts/broadcom/
Dbcm283x.dtsi1 #include <dt-bindings/pinctrl/bcm2835.h>
2 #include <dt-bindings/clock/bcm2835.h>
3 #include <dt-bindings/clock/bcm2835-aux.h>
4 #include <dt-bindings/gpio/gpio.h>
5 #include <dt-bindings/interrupt-controller/irq.h>
6 #include <dt-bindings/soc/bcm2835-pm.h>
8 /* firmware-provided startup stubs live here, where the secondary CPUs are
14 * bcm2835 and bcm2836 implementations, leaving the CPU configuration to
15 * bcm2835.dtsi and bcm2836.dtsi.
19 compatible = "brcm,bcm2835";
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/linux-6.14.4/drivers/clk/bcm/
Dclk-bcm2835.c1 // SPDX-License-Identifier: GPL-2.0+
8 * DOC: BCM2835 CPRMAN (clock manager for the "audio" domain)
27 #include <linux/clk-provider.h>
38 #include <dt-bindings/clock/bcm2835.h>
45 # define CM_DIV_FRAC_MASK GENMASK(CM_DIV_FRAC_BITS - 1, 0)
253 # define A2W_PLL_FRAC_MASK ((1 << A2W_PLL_FRAC_BITS) - 1)
337 writel(CM_PASSWORD | val, cprman->regs + reg); in cprman_write()
342 return readl(cprman->regs + reg); in cprman_read()
355 spin_lock(&cprman->regs_lock); in bcm2835_measure_tcnt_mux()
372 dev_err(cprman->dev, "timeout waiting for OSCCOUNT\n"); in bcm2835_measure_tcnt_mux()
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