| /linux/drivers/spi/ |
| H A D | Kconfig | 3 # SPI driver configuration
5 menuconfig SPI config
6 bool "SPI support"
10 protocol. Chips that support SPI can have data transfer rates
12 controller and a chipselect. Most SPI slaves don't support
15 SPI is widely used by microcontrollers to talk with sensors,
18 MMC and SD cards can be accessed using SPI protocol; and for
19 DataFlash cards used in MMC sockets, SPI must always be used.
21 SPI is one of a family of similar protocols using a four wire
26 if SPI
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| H A D | spi-stm32.c | 3 // STMicroelectronics STM32 SPI Controller driver
23 #include <linux/spi/spi.h>
27 /* STM32F4/7 SPI registers */
83 /* STM32F4 SPI Baud Rate min/max divisor */
87 /* STM32H7 SPI registers */
162 /* STM32MP25 SPI registers bit fields */
176 /* STM32H7 SPI Master Baud Rate min/max divisor */
180 /* STM32H7 SPI Communication mode */
186 /* SPI Communication type */
201 /* STM32 SPI driver helpers */
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| H A D | spi-gpio.c | 3 * SPI host driver using generic bitbanged GPIO
15 #include <linux/spi/spi.h>
16 #include <linux/spi/spi_bitbang.h>
17 #include <linux/spi/spi_gpio.h>
20 * This bitbanging SPI host driver should help make systems usable
21 * when a native hardware SPI engine is not available, perhaps because
27 * spi->controller_state ... reserved for bitbang framework code
29 * spi->controller->dev.driver_data ... points to spi_gpio->bitbang
47 spi_to_spi_gpio(const struct spi_device *spi) in spi_to_spi_gpio() argument
52 bang = spi_controller_get_devdata(spi->controller); in spi_to_spi_gpio()
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| H A D | spi.c | 2 // SPI init/core code
34 #include <linux/spi/offload/types.h>
35 #include <linux/spi/spi.h>
36 #include <linux/spi/spi-mem.h>
40 #include <trace/events/spi.h>
50 struct spi_device *spi = to_spi_device(dev); in spidev_release() local
52 spi_controller_put(spi->controller); in spidev_release()
53 kfree(spi->driver_override); in spidev_release()
54 free_percpu(spi->pcpu_statistics); in spidev_release()
55 kfree(spi); in spidev_release()
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| H A D | spi-omap2-mcspi.c | 28 #include <linux/spi/spi.h>
32 #include <linux/platform_data/spi-omap2-mcspi.h>
165 static inline void mcspi_write_cs_reg(const struct spi_device *spi, in mcspi_write_cs_reg() argument
168 struct omap2_mcspi_cs *cs = spi->controller_state; in mcspi_write_cs_reg()
173 static inline u32 mcspi_read_cs_reg(const struct spi_device *spi, int idx) in mcspi_read_cs_reg() argument
175 struct omap2_mcspi_cs *cs = spi->controller_state; in mcspi_read_cs_reg()
180 static inline u32 mcspi_cached_chconf0(const struct spi_device *spi) in mcspi_cached_chconf0() argument
182 struct omap2_mcspi_cs *cs = spi->controller_state; in mcspi_cached_chconf0()
187 static inline void mcspi_write_chconf0(const struct spi_device *spi, u32 val) in mcspi_write_chconf0() argument
189 struct omap2_mcspi_cs *cs = spi->controller_state; in mcspi_write_chconf0()
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| H A D | spi-loongson-core.c | 2 // Loongson SPI Support
15 #include <linux/spi/spi.h>
17 #include "spi-loongson.h"
19 static inline void loongson_spi_write_reg(struct loongson_spi *spi, unsigned char reg, in loongson_spi_write_reg() argument
22 writeb(data, spi->base + reg); in loongson_spi_write_reg()
25 static inline char loongson_spi_read_reg(struct loongson_spi *spi, unsigned char reg) in loongson_spi_read_reg() argument
27 return readb(spi->base + reg); in loongson_spi_read_reg()
30 static void loongson_spi_set_cs(struct spi_device *spi, bool en) in loongson_spi_set_cs() argument
33 unsigned char mask = (BIT(4) | BIT(0)) << spi_get_chipselect(spi, 0); in loongson_spi_set_cs()
34 unsigned char val = en ? mask : (BIT(0) << spi_get_chipselect(spi, 0)); in loongson_spi_set_cs()
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| H A D | spi-davinci.c | 18 #include <linux/spi/spi.h>
19 #include <linux/spi/spi_bitbang.h>
22 #include <linux/platform_data/spi-davinci.h>
88 /* SPI Controller registers */
103 /* SPI Controller driver's private data. */
197 static void davinci_spi_chipselect(struct spi_device *spi, int value) in davinci_spi_chipselect() argument
200 struct davinci_spi_config *spicfg = spi->controller_data; in davinci_spi_chipselect()
201 u8 chip_sel = spi_get_chipselect(spi, 0); in davinci_spi_chipselect()
204 dspi = spi_controller_get_devdata(spi->controller); in davinci_spi_chipselect()
214 if (spi_get_csgpiod(spi, 0)) { in davinci_spi_chipselect()
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| H A D | spi-bitbang.c | 3 * Polling/bitbanging SPI host controller controller driver utilities
16 #include <linux/spi/spi.h>
17 #include <linux/spi/spi_bitbang.h>
36 * NOTE: SPI controller pins can often be used as GPIO pins instead,
51 static unsigned int bitbang_txrx_8(struct spi_device *spi, in bitbang_txrx_8() argument
63 bitbang = spi_controller_get_devdata(spi->controller); in bitbang_txrx_8()
70 word = spi->mode & SPI_MOSI_IDLE_HIGH ? 0xFF : 0; in bitbang_txrx_8()
71 word = txrx_word(spi, ns, word, bits, flags); in bitbang_txrx_8()
77 bitbang->set_mosi_idle(spi); in bitbang_txrx_8()
82 static unsigned int bitbang_txrx_16(struct spi_device *spi, in bitbang_txrx_16() argument
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| /linux/drivers/video/backlight/ |
| H A D | ili922x.c | 7 * controller. The interface to the display is SPI and the display's
19 #include <linux/spi/spi.h>
104 * for the SPI transfer. According to the datasheet, the controller
109 * @s: pointer to an SPI device
138 struct spi_device *spi; member
145 * @spi: spi device
148 static int ili922x_read_status(struct spi_device *spi, u16 *rs) in ili922x_read_status() argument
161 CHECK_FREQ_REG(spi, &xfer); in ili922x_read_status()
175 ret = spi_sync(spi, &msg); in ili922x_read_status()
177 dev_dbg(&spi->dev, "Error sending SPI message 0x%x", ret); in ili922x_read_status()
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| H A D | l4f00242t03.c | 21 #include <linux/spi/spi.h>
24 struct spi_device *spi; member
46 static void l4f00242t03_lcd_init(struct spi_device *spi) in l4f00242t03_lcd_init() argument
48 struct l4f00242t03_priv *priv = spi_get_drvdata(spi); in l4f00242t03_lcd_init()
52 dev_dbg(&spi->dev, "initializing LCD\n"); in l4f00242t03_lcd_init()
56 dev_err(&spi->dev, "failed to set the IO regulator voltage.\n"); in l4f00242t03_lcd_init()
61 dev_err(&spi->dev, "failed to enable the IO regulator.\n"); in l4f00242t03_lcd_init()
67 dev_err(&spi->dev, "failed to set the core regulator voltage.\n"); in l4f00242t03_lcd_init()
73 dev_err(&spi->dev, "failed to enable the core regulator.\n"); in l4f00242t03_lcd_init()
82 spi_write(spi, (const u8 *)cmd, ARRAY_SIZE(cmd) * sizeof(u16)); in l4f00242t03_lcd_init()
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| /linux/drivers/staging/greybus/ |
| H A D | spilib.c | 3 * Greybus SPI library
14 #include <linux/spi/spi.h>
45 static struct spi_controller *get_controller_from_spi(struct gb_spilib *spi) in get_controller_from_spi() argument
47 return gb_connection_get_data(spi->connection); in get_controller_from_spi()
95 static void clean_xfer_state(struct gb_spilib *spi) in clean_xfer_state() argument
97 spi->first_xfer = NULL; in clean_xfer_state()
98 spi->last_xfer = NULL; in clean_xfer_state()
99 spi->rx_xfer_offset = 0; in clean_xfer_state()
100 spi->tx_xfer_offset = 0; in clean_xfer_state()
101 spi->last_xfer_size = 0; in clean_xfer_state()
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| /linux/drivers/net/wan/ |
| H A D | slic_ds26522.c | 16 #include <linux/spi/spi.h>
38 static void slic_write(struct spi_device *spi, u16 addr, in slic_write() argument
49 /* write spi addr and value */ in slic_write()
50 spi_write(spi, &temp[0], SLIC_THREE_LEN); in slic_write()
53 static u8 slic_read(struct spi_device *spi, u16 addr) in slic_read() argument
62 spi_write_then_read(spi, &temp[0], SLIC_TWO_LEN, &data, in slic_read()
69 static bool get_slic_product_code(struct spi_device *spi) in get_slic_product_code() argument
73 device_id = slic_read(spi, DS26522_IDR_ADDR); in get_slic_product_code()
80 static void ds26522_e1_spec_config(struct spi_device *spi) in ds26522_e1_spec_config() argument
83 slic_write(spi, DS26522_RMMR_ADDR, DS26522_RMMR_E1); in ds26522_e1_spec_config()
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| /linux/Documentation/devicetree/bindings/spi/ |
| H A D | mediatek,spi-mt65xx.yaml | 4 $id: http://devicetree.org/schemas/spi/mediatek,spi-mt65xx.yaml#
7 title: SPI Bus controller for MediaTek ARM SoCs
13 - $ref: /schemas/spi/spi-controller.yaml#
20 - mediatek,mt7629-spi
21 - mediatek,mt8365-spi
22 - const: mediatek,mt7622-spi
25 - mediatek,mt8516-spi
26 - const: mediatek,mt2712-spi
29 - mediatek,mt6779-spi
30 - mediatek,mt8186-spi
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| H A D | brcm,spi-bcm-qspi.yaml | 4 $id: http://devicetree.org/schemas/spi/brcm,spi-bcm-qspi.yaml#
7 title: Broadcom SPI controller
14 The Broadcom SPI controller is a SPI master found on various SOCs, including
15 BRCMSTB (BCM7XXX), Cygnus, NSP and NS2. The Broadcom Master SPI hw IP consists
17 MSPI : SPI master controller can read and write to a SPI slave device
18 BSPI : Broadcom SPI in combination with the MSPI hw IP provides acceleration
25 use SPI protocol.
28 - $ref: spi-controller.yaml#
36 - brcm,spi-bcm7425-qspi
37 - brcm,spi-bcm7429-qspi
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| H A D | snps,dw-apb-ssi.yaml | 4 $id: http://devicetree.org/schemas/spi/snps,dw-apb-ssi.yaml#
13 - $ref: spi-controller.yaml#
19 - mscc,ocelot-spi
20 - mscc,jaguar2-spi
44 const: amd,pensando-elba-spi
55 - description: Generic DW SPI Controller
59 - description: Microchip Sparx5 SoC SPI Controller
60 const: microchip,sparx5-spi
61 - description: Amazon Alpine SPI Controller
66 - mscc,ocelot-spi
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| H A D | spi-rockchip.yaml | 4 $id: http://devicetree.org/schemas/spi/spi-rockchip.yaml#
7 title: Rockchip SPI Controller
10 The Rockchip SPI controller is used to interface with various devices such
11 as flash and display controllers using the SPI communication interface.
14 - $ref: spi-controller.yaml#
23 - const: rockchip,rk3036-spi
24 - const: rockchip,rk3066-spi
25 - const: rockchip,rk3228-spi
26 - const: rockchip,rv1108-spi
29 - rockchip,px30-spi
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| /linux/drivers/misc/ |
| H A D | gehc-achc.c | 15 #include <linux/spi/spi.h>
59 static int ezport_start_programming(struct spi_device *spi, struct gpio_desc *reset) in ezport_start_programming() argument
68 spi_bus_lock(spi->controller); in ezport_start_programming()
73 ret = spi_sync_locked(spi, &msg); in ezport_start_programming()
85 ret = spi_sync_locked(spi, &msg); in ezport_start_programming()
88 spi_bus_unlock(spi->controller); in ezport_start_programming()
92 static void ezport_stop_programming(struct spi_device *spi, struct gpio_desc *reset) in ezport_stop_programming() argument
95 spi_bus_lock(spi->controller); in ezport_stop_programming()
97 spi_bus_unlock(spi->controller); in ezport_stop_programming()
100 static int ezport_get_status_register(struct spi_device *spi) in ezport_get_status_register() argument
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| H A D | lattice-ecp3-config.c | 11 #include <linux/spi/spi.h>
36 * (LatticeECP3 Slave SPI Port User's Guide)
67 struct spi_device *spi = (struct spi_device *)context; in firmware_load() local
68 struct fpga_data *data = spi_get_drvdata(spi); in firmware_load()
78 dev_err(&spi->dev, "Cannot load firmware, aborting\n"); in firmware_load()
83 dev_err(&spi->dev, "Error: Firmware size is 0!\n"); in firmware_load()
92 /* Trying to speak with the FPGA via SPI... */ in firmware_load()
94 spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len); in firmware_load()
96 dev_dbg(&spi->dev, "FPGA JTAG ID=%08x\n", jedec_id); in firmware_load()
103 dev_err(&spi->dev, in firmware_load()
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| /linux/drivers/media/dvb-frontends/cxd2880/ |
| H A D | cxd2880_spi_device.c | 5 * SPI access functions
10 #include <linux/spi/spi.h>
14 static int cxd2880_spi_device_write(struct cxd2880_spi *spi, in cxd2880_spi_device_write() argument
22 if (!spi || !spi->user || !data || size == 0) in cxd2880_spi_device_write()
25 spi_device = spi->user; in cxd2880_spi_device_write()
33 result = spi_sync(spi_device->spi, &msg); in cxd2880_spi_device_write()
41 static int cxd2880_spi_device_write_read(struct cxd2880_spi *spi, in cxd2880_spi_device_write_read() argument
50 if (!spi || !spi->user || !tx_data || in cxd2880_spi_device_write_read()
54 spi_device = spi->user; in cxd2880_spi_device_write_read()
56 result = spi_write_then_read(spi_device->spi, tx_data, in cxd2880_spi_device_write_read()
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| /linux/drivers/video/fbdev/omap2/omapfb/displays/ |
| H A D | panel-lgphilips-lb035q02.c | 12 #include <linux/spi/spi.h>
43 struct spi_device *spi; member
54 static int lb035q02_write_reg(struct spi_device *spi, u8 reg, u16 val) in lb035q02_write_reg() argument
82 return spi_sync(spi, &msg); in lb035q02_write_reg()
85 static void init_lb035q02_panel(struct spi_device *spi) in init_lb035q02_panel() argument
88 lb035q02_write_reg(spi, 0x01, 0x6300); in init_lb035q02_panel()
89 lb035q02_write_reg(spi, 0x02, 0x0200); in init_lb035q02_panel()
90 lb035q02_write_reg(spi, 0x03, 0x0177); in init_lb035q02_panel()
91 lb035q02_write_reg(spi, 0x04, 0x04c7); in init_lb035q02_panel()
92 lb035q02_write_reg(spi, 0x05, 0xffc0); in init_lb035q02_panel()
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| /linux/drivers/iio/common/st_sensors/ |
| H A D | st_sensors_spi.c | 3 * STMicroelectronics sensors spi library driver
15 #include <linux/spi/spi.h>
33 * st_sensors_is_spi_3_wire() - check if SPI 3-wire mode has been selected
34 * @spi: spi device reference.
36 * Return: true if SPI 3-wire mode is selected, false otherwise.
38 static bool st_sensors_is_spi_3_wire(struct spi_device *spi) in st_sensors_is_spi_3_wire() argument
41 struct device *dev = &spi->dev; in st_sensors_is_spi_3_wire()
43 if (device_property_read_bool(dev, "spi-3wire")) in st_sensors_is_spi_3_wire()
54 * st_sensors_configure_spi_3_wire() - configure SPI 3-wire if needed
55 * @spi: spi device reference.
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| /linux/Documentation/spi/ |
| H A D | spi-summary.rst | 2 Overview of Linux kernel SPI support
7 What is SPI?
9 The "Serial Peripheral Interface" (SPI) is a synchronous four wire serial
12 standardization body. SPI uses a host/target configuration.
22 SPI hosts use a fourth "chip select" line to activate a given SPI target
24 in parallel. All SPI targets support chipselects; they are usually active
29 SPI target functions are usually not interoperable between vendors
30 (except for commodities like SPI memory chips).
32 - SPI may be used for request/response style device protocols, as with
44 - Sometimes SPI is used to daisy-chain devices, like shift registers.
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| /linux/drivers/media/v4l2-core/ |
| H A D | v4l2-spi.c | 3 * v4l2-spi - SPI helpers for Video4Linux2
7 #include <linux/spi/spi.h>
13 struct spi_device *spi = v4l2_get_subdevdata(sd); in v4l2_spi_subdev_unregister() local
15 if (spi && !spi->dev.of_node && !spi->dev.fwnode) in v4l2_spi_subdev_unregister()
16 spi_unregister_device(spi); in v4l2_spi_subdev_unregister()
19 void v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi, in v4l2_spi_subdev_init() argument
25 sd->owner = spi->dev.driver->owner; in v4l2_spi_subdev_init()
26 sd->dev = &spi->dev; in v4l2_spi_subdev_init()
28 v4l2_set_subdevdata(sd, spi); in v4l2_spi_subdev_init()
29 spi_set_drvdata(spi, sd); in v4l2_spi_subdev_init()
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| /linux/drivers/net/dsa/b53/ |
| H A D | b53_spi.c | 2 * B53 register access through SPI
24 #include <linux/spi/spi.h>
42 static inline int b53_spi_read_reg(struct spi_device *spi, u8 reg, u8 *val, in b53_spi_read_reg() argument
50 return spi_write_then_read(spi, txbuf, 2, val, len); in b53_spi_read_reg()
53 static inline int b53_spi_clear_status(struct spi_device *spi) in b53_spi_clear_status() argument
60 ret = b53_spi_read_reg(spi, B53_SPI_STATUS, &rxbuf, 1); in b53_spi_clear_status()
76 static inline int b53_spi_set_page(struct spi_device *spi, u8 page) in b53_spi_set_page() argument
84 return spi_write(spi, txbuf, sizeof(txbuf)); in b53_spi_set_page()
87 static inline int b53_prepare_reg_access(struct spi_device *spi, u8 page) in b53_prepare_reg_access() argument
89 int ret = b53_spi_clear_status(spi); in b53_prepare_reg_access()
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| /linux/drivers/tty/serial/ |
| H A D | sc16is7xx_spi.c | 2 /* SC16IS7xx SPI interface driver */
8 #include <linux/spi/spi.h>
14 /* SPI definitions */
17 static int sc16is7xx_spi_probe(struct spi_device *spi) in sc16is7xx_spi_probe() argument
25 /* Setup SPI bus */ in sc16is7xx_spi_probe()
26 spi->bits_per_word = 8; in sc16is7xx_spi_probe()
28 if ((spi->mode & SPI_MODE_X_MASK) != SPI_MODE_0) in sc16is7xx_spi_probe()
29 return dev_err_probe(&spi->dev, -EINVAL, "Unsupported SPI mode\n"); in sc16is7xx_spi_probe()
31 spi->mode = spi->mode ? : SPI_MODE_0; in sc16is7xx_spi_probe()
32 spi->max_speed_hz = spi->max_speed_hz ? : 4 * HZ_PER_MHZ; in sc16is7xx_spi_probe()
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