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/linux/drivers/net/can/spi/mcp251xfd/
H A Dmcp251xfd-regmap.c1 // SPDX-License-Identifier: GPL-2.0
3 // mcp251xfd - Microchip MCP251xFD Family CAN controller driver
6 // Marc Kleine-Budde <kernel@pengutronix.de>
18 struct spi_device *spi = context; in mcp251xfd_regmap_nocrc_write() local
20 return spi_write(spi, data, count); in mcp251xfd_regmap_nocrc_write()
28 struct spi_device *spi = context; in mcp251xfd_regmap_nocrc_gather_write() local
29 struct mcp251xfd_priv *priv = spi_get_drvdata(spi); in mcp251xfd_regmap_nocrc_gather_write()
30 struct mcp251xfd_map_buf_nocrc *buf_tx = priv->map_buf_nocrc_tx; in mcp251xfd_regmap_nocrc_gather_write()
34 .len = sizeof(buf_tx->cmd) + val_len, in mcp251xfd_regmap_nocrc_gather_write()
38 BUILD_BUG_ON(sizeof(buf_tx->cmd) != sizeof(__be16)); in mcp251xfd_regmap_nocrc_gather_write()
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H A Dmcp251xfd-tx.c1 // SPDX-License-Identifier: GPL-2.0
3 // mcp251xfd - Microchip MCP251xFD Family CAN controller driver
6 // Marc Kleine-Budde <kernel@pengutronix.de>
10 // CAN bus driver for Microchip 25XXFD CAN Controller with SPI Interface
27 return &tx_ring->obj[tx_head]; in mcp251xfd_get_tx_obj_next()
36 const struct canfd_frame *cfd = (struct canfd_frame *)skb->data; in mcp251xfd_tx_obj_from_skb()
43 if (cfd->can_id & CAN_EFF_FLAG) { in mcp251xfd_tx_obj_from_skb()
46 sid = FIELD_GET(MCP251XFD_REG_FRAME_EFF_SID_MASK, cfd->can_id); in mcp251xfd_tx_obj_from_skb()
47 eid = FIELD_GET(MCP251XFD_REG_FRAME_EFF_EID_MASK, cfd->can_id); in mcp251xfd_tx_obj_from_skb()
54 id = FIELD_PREP(MCP251XFD_OBJ_ID_SID_MASK, cfd->can_id); in mcp251xfd_tx_obj_from_skb()
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H A Dmcp251xfd-core.c1 // SPDX-License-Identifier: GPL-2.0
3 // mcp251xfd - Microchip MCP251xFD Family CAN controller driver
6 // Marc Kleine-Budde <kernel@pengutronix.de>
10 // CAN bus driver for Microchip 25XXFD CAN Controller with SPI Interface
47 /* Autodetect model, start with CRC enabled. */
79 * [-64,63] for TDCO, indicating a relative TDCO.
115 return __mcp251xfd_get_model_str(priv->devtype_data.model); in mcp251xfd_get_model_str()
160 if (!priv->reg_vdd) in mcp251xfd_vdd_enable()
163 return regulator_enable(priv->reg_vdd); in mcp251xfd_vdd_enable()
168 if (!priv->reg_vdd) in mcp251xfd_vdd_disable()
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H A Dmcp251xfd.h1 /* SPDX-License-Identifier: GPL-2.0
3 * mcp251xfd - Microchip MCP251xFD Family CAN controller driver
6 * Marc Kleine-Budde <kernel@pengutronix.de>
16 #include <linux/can/rx-offload.h>
22 #include <linux/spi/spi.h>
370 /* SPI commands */
425 /* Use CRC to access registers */
427 /* Use CRC to access RX/TEF-RAM */
429 /* Use CRC to access TX-RAM */
433 /* Use Half Duplex SPI transfers */
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H A Dmcp251xfd-crc16.c1 // SPDX-License-Identifier: GPL-2.0
3 // mcp251xfd - Microchip MCP251xFD Family CAN controller driver
6 // Marc Kleine-Budde <kernel@pengutronix.de>
10 // CAN bus driver for Microchip 25XXFD CAN Controller with SPI Interface
58 static inline u16 mcp251xfd_crc16_byte(u16 crc, const u8 data) in mcp251xfd_crc16_byte() argument
60 u8 index = (crc >> 8) ^ data; in mcp251xfd_crc16_byte()
62 return (crc << 8) ^ mcp251xfd_crc16_table[index]; in mcp251xfd_crc16_byte()
65 static u16 mcp251xfd_crc16(u16 crc, u8 const *buffer, size_t len) in mcp251xfd_crc16() argument
67 while (len--) in mcp251xfd_crc16()
68 crc = mcp251xfd_crc16_byte(crc, *buffer++); in mcp251xfd_crc16()
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/linux/drivers/leds/
H A Dleds-cr0014114.c1 // SPDX-License-Identifier: GPL-2.0
9 #include <linux/spi/spi.h>
13 * CR0014114 SPI protocol descrtiption:
14 * +----+-----------------------------------+----+
15 * | CMD| BRIGHTNESS |CRC |
16 * +----+-----------------------------------+----+
18 * | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
20 * | 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 1 |
22 * | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
24 * +----+-----------------------------------+----+
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/linux/net/nfc/nci/
H A Dspi.c1 // SPDX-License-Identifier: GPL-2.0-only
11 #include <linux/spi/spi.h>
12 #include <linux/crc-ccitt.h>
37 /* a NULL skb means we just want the SPI chip select line to raise */ in __nci_spi_send()
39 t.tx_buf = skb->data; in __nci_spi_send()
40 t.len = skb->len; in __nci_spi_send()
47 t.delay.value = nspi->xfer_udelay; in __nci_spi_send()
49 t.speed_hz = nspi->xfer_speed_hz; in __nci_spi_send()
54 return spi_sync(nspi->spi, &m); in __nci_spi_send()
61 unsigned int payload_len = skb->len; in nci_spi_send()
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/linux/drivers/misc/mei/
H A Dvsc-tp.c1 // SPDX-License-Identifier: GPL-2.0-only
19 #include <linux/spi/spi.h>
23 #include "vsc-tp.h"
36 /* SPI xfer timeout size */
40 (sizeof(struct vsc_tp_packet_hdr) + le16_to_cpu((pkt)->hdr.len) + VSC_TP_CRC_SIZE)
46 (len + sizeof(struct vsc_tp_packet_hdr) + VSC_TP_CRC_SIZE - offset + VSC_TP_PACKET_PADDING_SIZE)
57 __u8 buf[VSC_TP_MAX_XFER_SIZE - sizeof(struct vsc_tp_packet_hdr)];
62 struct spi_device *spi; member
95 { "wakeuphost-gpios", &wakeuphost_gpio, 1 },
96 { "wakeuphostint-gpios", &wakeuphostint_gpio, 1 },
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/linux/drivers/input/keyboard/
H A Dapplespi.c1 // SPDX-License-Identifier: GPL-2.0
3 * MacBook (Pro) SPI keyboard and touchpad driver
5 * Copyright (c) 2015-2018 Federico Lorenzi
6 * Copyright (c) 2017-2018 Ronald Tschalär
11 * MacBook8 and newer can be driven either by USB or SPI. However the USB
15 * * UIEN ("USB Interface Enable"): If invoked with argument 1, disables SPI
18 * * SIEN ("SPI Interface Enable"): If invoked with argument 1, disables USB
19 * and enables SPI. If invoked with argument 0, disables SPI.
20 * * SIST ("SPI Interface Status"): Returns 1 if SPI is enabled, 0 otherwise.
21 * * ISOL: Resets the four GPIO pins used for SPI. Intended to be invoked with
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/linux/drivers/iio/imu/
H A Dadis16550.c1 // SPDX-License-Identifier: GPL-2.0
23 #include <linux/spi/spi.h>
75 /* SPI protocol*/
136 u8 crc = 0xa; in spi_crc4() local
140 /* Calculate crc4 over four-bit nibbles, starting at the MSbit */ in spi_crc4()
141 for (i = bits - 4; i >= 0; i -= 4) in spi_crc4()
142 crc = crc ^ ((__val >> i) & 0xf); in spi_crc4()
144 return crc; in spi_crc4()
151 u8 crc, crc_rcv, sv; in adis16550_spi_validate() local
157 crc = spi_crc4(__dout); in adis16550_spi_validate()
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H A Dsmi240.c1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
11 #include <linux/spi/spi.h>
153 u8 crc = init; in smi240_crc3() local
158 do_xor = crc & 0x04; in smi240_crc3()
159 crc <<= 1; in smi240_crc3()
160 crc |= 0x01 & (data >> i); in smi240_crc3()
162 crc ^= poly; in smi240_crc3()
164 crc &= SMI240_CRC_MASK; in smi240_crc3()
165 } while (--i >= 0); in smi240_crc3()
167 return crc; in smi240_crc3()
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/linux/drivers/net/ieee802154/
H A Dcc2520.c1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Driver for TI CC2520 802.15.4 Wireless-PAN Networking controller
12 #include <linux/spi/spi.h>
18 #include <linux/crc-ccitt.h>
47 /* IEEE-802.15.4 defined constants (2.4 GHz logical channels) */
202 struct spi_device *spi; /* SPI device structure */ member
203 struct ieee802154_hw *hw; /* IEEE-802.15.4 device */
204 u8 *buf; /* SPI TX/Rx data buffer */
205 struct mutex buffer_mutex; /* SPI buffer mutex */
223 .tx_buf = priv->buf, in cc2520_cmd_strobe()
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/linux/arch/mips/cavium-octeon/executive/
H A Dcvmx-helper-spi.c7 * Copyright (C) 2003-2018 Cavium, Inc.
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
29 * Functions for SPI initialization, configuration,
34 #include <asm/octeon/cvmx-config.h>
35 #include <asm/octeon/cvmx-spi.h>
36 #include <asm/octeon/cvmx-helper.h>
38 #include <asm/octeon/cvmx-pip-defs.h>
39 #include <asm/octeon/cvmx-pko-defs.h>
40 #include <asm/octeon/cvmx-spxx-defs.h>
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/linux/Documentation/devicetree/bindings/net/
H A Dadi,adin1110.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: ADI ADIN1110 MAC-PHY
10 - Marcelo Schmitt <marcelo.schmitt@analog.com>
13 The ADIN1110 is a low power single port 10BASE-T1L MAC-
18 The ADIN2111 is a low power, low complexity, two-Ethernet ports
19 switch with integrated 10BASE-T1L PHYs and one serial peripheral
20 interface (SPI) port. The device is designed for industrial Ethernet
22 with the IEEE 802.3cg-2019 Ethernet standard for long reach
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/linux/drivers/iio/accel/
H A Dsca3300.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Murata SCA3300 3-axis industrial accelerometer
13 #include <linux/spi/spi.h>
181 * struct sca3300_data - device data
182 * @spi: SPI device structure
189 struct spi_device *spi; member
242 u8 crc; in sca3300_transfer() local
245 .tx_buf = sca_data->txbuf, in sca3300_transfer()
246 .len = ARRAY_SIZE(sca_data->txbuf), in sca3300_transfer()
251 .rx_buf = sca_data->rxbuf, in sca3300_transfer()
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/linux/drivers/iio/adc/
H A Dad7280a.c1 // SPDX-License-Identifier: GPL-2.0
22 #include <linux/spi/spi.h>
129 #define AD7280A_NUM_CH (AD7280A_AUX_ADC_6_REG - \
135 (c) - AD7280A_CELLS_PER_DEV)
143 /* 5-bit device address is sent LSB first */
157 * So the TXVAL is AD7280A_DEVADDR_ALL + CRC
162 * AD7280 CRC
169 struct spi_device *spi; member
193 unsigned char crc; in ad7280_calc_crc8() local
195 crc = crc_tab[val >> 16 & 0xFF]; in ad7280_calc_crc8()
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/linux/fs/jffs2/
H A Dsummary.c2 * JFFS2 -- Journalling Flash File System, Version 2.
4 * Copyright © 2004 Ferenc Havasi <havasi@inf.u-szeged.hu>,
5 * Zoltan Sogor <weth@inf.u-szeged.hu>,
6 * Patrik Kluba <pajko@halom.u-szeged.hu>,
28 uint32_t sum_size = min_t(uint32_t, c->sector_size, MAX_SUMMARY_SIZE); in jffs2_sum_init()
30 c->summary = kzalloc(sizeof(struct jffs2_summary), GFP_KERNEL); in jffs2_sum_init()
32 if (!c->summary) { in jffs2_sum_init()
34 return -ENOMEM; in jffs2_sum_init()
37 c->summary->sum_buf = kmalloc(sum_size, GFP_KERNEL); in jffs2_sum_init()
39 if (!c->summary->sum_buf) { in jffs2_sum_init()
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/linux/drivers/soc/samsung/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0
12 bool "Exynos ASV ARMv7-specific driver extensions" if COMPILE_TEST
33 IP-core found in modern Samsung Exynos SoCs, like Exynos850 and
35 following serial protocols: UART, SPI or High Speed I2C.
49 bool "Exynos PMU ARMv7-specific driver extensions" if COMPILE_TEST
53 bool "S3C2410 PM Suspend Memory CRC"
66 int "S3C2410 PM Suspend CRC Chunksize (KiB)"
70 Set the chunksize in Kilobytes of the CRC for checking memory
72 the CRC data block will take more memory, but will identify any
/linux/drivers/gpio/
H A Dgpio-max3191x.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * gpio-max3191x.c - GPIO driver for Maxim MAX3191x industrial serializer
7 * The MAX3191x makes 8 digital 24V inputs available via SPI.
8 * Multiple chips can be daisy-chained, the spec does not impose
11 * Either of two modes is selectable: In 8-bit mode, only the state
13 * In 16-bit mode, an additional status byte is clocked out with
14 * a CRC and indicator bits for undervoltage and overtemperature.
17 * readout of non-faulting chips in the same daisy-chain.
21 * daisy-chain.
23 * If the chips are hardwired to 8-bit mode ("modesel" pulled high),
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/linux/arch/mips/include/asm/octeon/
H A Dcvmx-pip.h7 * Copyright (c) 2003-2008 Cavium Networks
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
36 #include <asm/octeon/cvmx-wqe.h>
37 #include <asm/octeon/cvmx-fpa.h>
38 #include <asm/octeon/cvmx-pip-defs.h>
103 /* RGM+SPI 1 = partially received packet (buffering/bandwidth
106 /* RGM+SPI 2 = receive packet too large and truncated */
113 /* RGM+SPI 4 = max frame error (pkt len > max frame len) */
116 * RGM 5 = nibble error (data not byte multiple - 100M and 10M
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/linux/arch/arm/boot/dts/st/
H A Dstm32f746.dtsi2 * Copyright 2015 - Maxime Coquelin <mcoquelin.stm32@gmail.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/stm32fx-clock.h>
45 #include <dt-bindings/mfd/stm32f7-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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H A Dstm32f429.dtsi2 * Copyright 2015 - Maxime Coquelin <mcoquelin.stm32@gmail.com>
4 * This file is dual-licensed: you can use it either under the terms
22 * MA 02110-1301 USA
48 #include "../armv7-m.dtsi"
49 #include <dt-bindings/clock/stm32fx-clock.h>
50 #include <dt-bindings/mfd/stm32f4-rcc.h>
53 #address-cells = <1>;
54 #size-cells = <1>;
57 clk_hse: clk-hse {
58 #clock-cells = <0>;
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/linux/drivers/nfc/st95hf/
H A Dcore.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * --------------------------------------------------------------------
5 * --------------------------------------------------------------------
24 #include "spi.h"
100 * List of top-level cmds to be used internally by the driver.
195 * for spi communication between st95hf and host.
250 struct device *dev = &st95context->spicontext.spidev->dev; in st95hf_send_recv_cmd()
253 return -EINVAL; in st95hf_send_recv_cmd()
255 return -EINVAL; in st95hf_send_recv_cmd()
257 return -EINVAL; in st95hf_send_recv_cmd()
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/linux/drivers/net/dsa/sja1105/
H A Dsja1105_dynamic_config.c1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2018-2019, Vladimir Oltean <olteanv@gmail.com>
6 /* In the dynamic configuration interface, the switch exposes a register-like
13 * This file creates a per-switch-family abstraction called
15 * - sja1105_dynamic_config_write
16 * - sja1105_dynamic_config_read
25 * +-----------------------------------------+------------------+
27 * +-----------------------------------------+------------------+
29 * <----------------------- packed_size ------------------------>
33 * function is reused (bar exceptional cases - see
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/linux/drivers/mfd/
H A Dtps6594-spi.c1 // SPDX-License-Identifier: GPL-2.0
3 * SPI access driver for the following TI PMICs:
4 * - LP8764
5 * - TPS65224
6 * - TPS652G1
7 * - TPS6593
8 * - TPS6594
10 * Copyright (C) 2023 BayLibre Incorporated - https://www.baylibre.com/
18 #include <linux/spi/spi.h>
27 MODULE_PARM_DESC(enable_crc, "Enable CRC feature for SPI interface");
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