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/linux/drivers/i2c/busses/
H A Di2c-npcm7xx.c30 * of the bus.
126 #define NPCM_I2CT_OUT 0x14 /* Bus T.O. */
155 #define NPCM_I2CST_BER BIT(5) /* Bus error */
161 #define NPCM_I2CCST_BB BIT(1) /* Bus busy */
337 bool ber_state; /* Indicate the bus error state */
340 static inline void npcm_i2c_select_bank(struct npcm_i2c *bus, in npcm_i2c_select_bank() argument
343 u8 i2cctl3 = ioread8(bus->reg + NPCM_I2CCTL3); in npcm_i2c_select_bank()
349 iowrite8(i2cctl3, bus->reg + NPCM_I2CCTL3); in npcm_i2c_select_bank()
352 static void npcm_i2c_init_params(struct npcm_i2c *bus) in npcm_i2c_init_params() argument
354 bus->stop_ind = I2C_NO_STATUS_IND; in npcm_i2c_init_params()
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H A Di2c-aspeed.c171 static int aspeed_i2c_reset(struct aspeed_i2c_bus *bus);
173 /* precondition: bus.lock has been acquired. */
174 static void aspeed_i2c_do_stop(struct aspeed_i2c_bus *bus) in aspeed_i2c_do_stop() argument
176 bus->master_state = ASPEED_I2C_MASTER_STOP; in aspeed_i2c_do_stop()
177 writel(ASPEED_I2CD_M_STOP_CMD, bus->base + ASPEED_I2C_CMD_REG); in aspeed_i2c_do_stop()
180 static int aspeed_i2c_recover_bus(struct aspeed_i2c_bus *bus) in aspeed_i2c_recover_bus() argument
186 spin_lock_irqsave(&bus->lock, flags); in aspeed_i2c_recover_bus()
187 command = readl(bus->base + ASPEED_I2C_CMD_REG); in aspeed_i2c_recover_bus()
190 /* Bus is idle: no recovery needed. */ in aspeed_i2c_recover_bus()
193 dev_dbg(bus->dev, "SCL hung (state %x), attempting recovery\n", in aspeed_i2c_recover_bus()
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/linux/sound/hda/
H A Dhdac_controller.c15 static void azx_clear_corbrp(struct hdac_bus *bus) in azx_clear_corbrp() argument
20 if (snd_hdac_chip_readw(bus, CORBRP) & AZX_CORBRP_RST) in azx_clear_corbrp()
25 dev_err(bus->dev, "CORB reset timeout#1, CORBRP = %d\n", in azx_clear_corbrp()
26 snd_hdac_chip_readw(bus, CORBRP)); in azx_clear_corbrp()
28 snd_hdac_chip_writew(bus, CORBRP, 0); in azx_clear_corbrp()
30 if (snd_hdac_chip_readw(bus, CORBRP) == 0) in azx_clear_corbrp()
35 dev_err(bus->dev, "CORB reset timeout#2, CORBRP = %d\n", in azx_clear_corbrp()
36 snd_hdac_chip_readw(bus, CORBRP)); in azx_clear_corbrp()
41 * @bus: HD-audio core bus
43 void snd_hdac_bus_init_cmd_io(struct hdac_bus *bus) in snd_hdac_bus_init_cmd_io() argument
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H A Dhdac_bus.c3 * HD-audio core bus driver
24 * snd_hdac_bus_init - initialize a HD-audio bas bus
25 * @bus: the pointer to bus object
27 * @ops: bus verb operators
31 int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev, in snd_hdac_bus_init() argument
34 memset(bus, 0, sizeof(*bus)); in snd_hdac_bus_init()
35 bus->dev = dev; in snd_hdac_bus_init()
37 bus->ops = ops; in snd_hdac_bus_init()
39 bus->ops = &default_ops; in snd_hdac_bus_init()
40 bus->dma_type = SNDRV_DMA_TYPE_DEV; in snd_hdac_bus_init()
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/linux/sound/i2c/
H A Di2c.c25 static int snd_i2c_bit_probeaddr(struct snd_i2c_bus *bus,
34 static int snd_i2c_bus_free(struct snd_i2c_bus *bus) in snd_i2c_bus_free() argument
39 if (snd_BUG_ON(!bus)) in snd_i2c_bus_free()
41 while (!list_empty(&bus->devices)) { in snd_i2c_bus_free()
42 device = snd_i2c_device(bus->devices.next); in snd_i2c_bus_free()
45 if (bus->master) in snd_i2c_bus_free()
46 list_del(&bus->buses); in snd_i2c_bus_free()
48 while (!list_empty(&bus->buses)) { in snd_i2c_bus_free()
49 slave = snd_i2c_slave_bus(bus->buses.next); in snd_i2c_bus_free()
50 snd_device_free(bus->card, slave); in snd_i2c_bus_free()
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/linux/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/
H A Dbit.c24 #include "bus.h"
32 nvkm_i2c_drive_scl(struct nvkm_i2c_bus *bus, int state) in nvkm_i2c_drive_scl() argument
34 bus->func->drive_scl(bus, state); in nvkm_i2c_drive_scl()
38 nvkm_i2c_drive_sda(struct nvkm_i2c_bus *bus, int state) in nvkm_i2c_drive_sda() argument
40 bus->func->drive_sda(bus, state); in nvkm_i2c_drive_sda()
44 nvkm_i2c_sense_scl(struct nvkm_i2c_bus *bus) in nvkm_i2c_sense_scl() argument
46 return bus->func->sense_scl(bus); in nvkm_i2c_sense_scl()
50 nvkm_i2c_sense_sda(struct nvkm_i2c_bus *bus) in nvkm_i2c_sense_sda() argument
52 return bus->func->sense_sda(bus); in nvkm_i2c_sense_sda()
56 nvkm_i2c_delay(struct nvkm_i2c_bus *bus, u32 nsec) in nvkm_i2c_delay() argument
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H A Dbus.c24 #include "bus.h"
35 struct nvkm_i2c_bus *bus = container_of(adap, typeof(*bus), i2c); in nvkm_i2c_bus_pre_xfer() local
36 return nvkm_i2c_bus_acquire(bus); in nvkm_i2c_bus_pre_xfer()
42 struct nvkm_i2c_bus *bus = container_of(adap, typeof(*bus), i2c); in nvkm_i2c_bus_post_xfer() local
43 return nvkm_i2c_bus_release(bus); in nvkm_i2c_bus_post_xfer()
49 struct nvkm_i2c_bus *bus = data; in nvkm_i2c_bus_setscl() local
50 bus->func->drive_scl(bus, state); in nvkm_i2c_bus_setscl()
56 struct nvkm_i2c_bus *bus = data; in nvkm_i2c_bus_setsda() local
57 bus->func->drive_sda(bus, state); in nvkm_i2c_bus_setsda()
63 struct nvkm_i2c_bus *bus = data; in nvkm_i2c_bus_getscl() local
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/linux/drivers/net/phy/
H A Dmdio_bus.c2 /* MDIO Bus interface
73 if (mdiodev->bus->mdio_map[mdiodev->addr]) in mdiobus_register_device()
89 mdiodev->bus->mdio_map[mdiodev->addr] = mdiodev; in mdiobus_register_device()
97 if (mdiodev->bus->mdio_map[mdiodev->addr] != mdiodev) in mdiobus_unregister_device()
102 mdiodev->bus->mdio_map[mdiodev->addr] = NULL; in mdiobus_unregister_device()
108 static struct mdio_device *mdiobus_find_device(struct mii_bus *bus, int addr) in mdiobus_find_device() argument
110 bool addr_valid = addr >= 0 && addr < ARRAY_SIZE(bus->mdio_map); in mdiobus_find_device()
115 return bus->mdio_map[addr]; in mdiobus_find_device()
118 struct phy_device *mdiobus_get_phy(struct mii_bus *bus, int addr) in mdiobus_get_phy() argument
122 mdiodev = mdiobus_find_device(bus, addr); in mdiobus_get_phy()
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H A Dsfp-bus.c14 * struct sfp_bus - internal representation of a sfp bus
37 * @bus: a pointer to the &struct sfp_bus structure for the sfp module
49 int sfp_parse_port(struct sfp_bus *bus, const struct sfp_eeprom_id *id, in sfp_parse_port() argument
88 dev_warn(bus->sfp_dev, "SFP: unknown connector id 0x%02x\n", in sfp_parse_port()
112 * @bus: a pointer to the &struct sfp_bus structure for the sfp module
118 bool sfp_may_have_phy(struct sfp_bus *bus, const struct sfp_eeprom_id *id) in sfp_may_have_phy() argument
139 * @bus: a pointer to the &struct sfp_bus structure for the sfp module
148 void sfp_parse_support(struct sfp_bus *bus, const struct sfp_eeprom_id *id, in sfp_parse_support() argument
298 dev_warn(bus->sfp_dev, in sfp_parse_support()
342 if (bus->sfp_quirk && bus->sfp_quirk->modes) in sfp_parse_support()
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/linux/drivers/ssb/
H A Ddriver_gpio.c28 struct ssb_bus *bus = gpiochip_get_data(chip); in ssb_gpio_to_irq() local
30 if (bus->bustype == SSB_BUSTYPE_SSB) in ssb_gpio_to_irq()
31 return irq_find_mapping(bus->irq_domain, gpio); in ssb_gpio_to_irq()
43 struct ssb_bus *bus = gpiochip_get_data(chip); in ssb_gpio_chipco_get_value() local
45 return !!ssb_chipco_gpio_in(&bus->chipco, 1 << gpio); in ssb_gpio_chipco_get_value()
51 struct ssb_bus *bus = gpiochip_get_data(chip); in ssb_gpio_chipco_set_value() local
53 ssb_chipco_gpio_out(&bus->chipco, 1 << gpio, value ? 1 << gpio : 0); in ssb_gpio_chipco_set_value()
59 struct ssb_bus *bus = gpiochip_get_data(chip); in ssb_gpio_chipco_direction_input() local
61 ssb_chipco_gpio_outen(&bus->chipco, 1 << gpio, 0); in ssb_gpio_chipco_direction_input()
68 struct ssb_bus *bus = gpiochip_get_data(chip); in ssb_gpio_chipco_direction_output() local
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H A Dscan.c3 * Bus scanning
160 static u32 scan_read32(struct ssb_bus *bus, u8 current_coreidx, in scan_read32() argument
165 switch (bus->bustype) { in scan_read32()
173 ssb_pcmcia_switch_segment(bus, 1); in scan_read32()
176 ssb_pcmcia_switch_segment(bus, 0); in scan_read32()
177 lo = readw(bus->mmio + offset); in scan_read32()
178 hi = readw(bus->mmio + offset + 2); in scan_read32()
182 return ssb_sdio_scan_read32(bus, offset); in scan_read32()
184 return readl(bus->mmio + offset); in scan_read32()
187 static int scan_switchcore(struct ssb_bus *bus, u8 coreidx) in scan_switchcore() argument
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H A Dembedded.c23 int ssb_watchdog_timer_set(struct ssb_bus *bus, u32 ticks) in ssb_watchdog_timer_set() argument
25 if (ssb_chipco_available(&bus->chipco)) { in ssb_watchdog_timer_set()
26 ssb_chipco_watchdog_timer_set(&bus->chipco, ticks); in ssb_watchdog_timer_set()
29 if (ssb_extif_available(&bus->extif)) { in ssb_watchdog_timer_set()
30 ssb_extif_watchdog_timer_set(&bus->extif, ticks); in ssb_watchdog_timer_set()
37 int ssb_watchdog_register(struct ssb_bus *bus) in ssb_watchdog_register() argument
42 if (ssb_chipco_available(&bus->chipco)) { in ssb_watchdog_register()
43 wdt.driver_data = &bus->chipco; in ssb_watchdog_register()
46 wdt.max_timer_ms = bus->chipco.max_timer_ms; in ssb_watchdog_register()
47 } else if (ssb_extif_available(&bus->extif)) { in ssb_watchdog_register()
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H A Dsdio.c104 static inline struct device *ssb_sdio_dev(struct ssb_bus *bus) in ssb_sdio_dev() argument
106 return &bus->host_sdio->dev; in ssb_sdio_dev()
110 static int ssb_sdio_writeb(struct ssb_bus *bus, unsigned int addr, u8 val) in ssb_sdio_writeb() argument
114 sdio_writeb(bus->host_sdio, val, addr, &error); in ssb_sdio_writeb()
116 dev_dbg(ssb_sdio_dev(bus), "%08X <- %02x, error %d\n", in ssb_sdio_writeb()
124 static u8 ssb_sdio_readb(struct ssb_bus *bus, unsigned int addr)
129 val = sdio_readb(bus->host_sdio, addr, &error);
131 dev_dbg(ssb_sdio_dev(bus), "%08X -> %02x, error %d\n",
140 static int ssb_sdio_set_sbaddr_window(struct ssb_bus *bus, u32 address) in ssb_sdio_set_sbaddr_window() argument
144 error = ssb_sdio_writeb(bus, SBSDIO_FUNC1_SBADDRLOW, in ssb_sdio_set_sbaddr_window()
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/linux/Documentation/ABI/testing/
H A Dsysfs-bus-i3c1 What: /sys/bus/i3c/devices/i3c-<bus-id>
5 An I3C bus. This directory will contain one sub-directory per
6 I3C device present on the bus.
8 What: /sys/bus/i3c/devices/i3c-<bus-id>/current_master
12 Expose the master that owns the bus (<bus-id>-<master-pid>) at
13 the time this file is read. Note that bus ownership can change
17 What: /sys/bus/i3c/devices/i3c-<bus-id>/mode
21 I3C bus mode. Can be "pure", "mixed-fast" or "mixed-slow". See
25 What: /sys/bus/i3c/devices/i3c-<bus-id>/i3c_scl_frequency
32 What: /sys/bus/i3c/devices/i3c-<bus-id>/i2c_scl_frequency
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H A Dsysfs-bus-soundwire-slave1 What: /sys/bus/soundwire/devices/sdw:.../status
2 /sys/bus/soundwire/devices/sdw:.../device_number
16 physically present on the bus, and conversely devices
19 What: /sys/bus/soundwire/devices/sdw:.../dev-properties/mipi_revision
20 /sys/bus/soundwire/devices/sdw:.../dev-properties/wake_capable
21 /sys/bus/soundwire/devices/sdw:.../dev-properties/test_mode_capable
22 /sys/bus/soundwire/devices/sdw:.../dev-properties/clk_stop_mode1
23 /sys/bus/soundwire/devices/sdw:.../dev-properties/simple_clk_stop_capable
24 /sys/bus/soundwire/devices/sdw:.../dev-properties/clk_stop_timeout
25 /sys/bus/soundwire/devices/sdw:.../dev-properties/ch_prep_timeout
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/linux/drivers/bcma/
H A Dmain.c3 * Bus subsystem
23 /* contains the number the next bus should get. */
80 static u16 bcma_cc_core_id(struct bcma_bus *bus) in bcma_cc_core_id() argument
82 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706) in bcma_cc_core_id()
87 struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid, in bcma_find_core_unit() argument
92 list_for_each_entry(core, &bus->cores, list) { in bcma_find_core_unit()
114 bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg); in bcma_wait_value()
192 bcma_debug(core->bus, "bcma_of_get_irq() failed with rc=%d\n", in bcma_of_get_irq()
216 struct bcma_bus *bus = core->bus; in bcma_core_irq() local
219 switch (bus->hosttype) { in bcma_core_irq()
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H A Ddriver_mips.c36 return dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM47162 && in bcma_core_mips_bcm47162a0_quirk()
37 dev->bus->chipinfo.rev == 0 && dev->id.id == BCMA_CORE_MIPS_74K; in bcma_core_mips_bcm47162a0_quirk()
43 return (dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM5357 || in bcma_core_mips_bcm5357b0_quirk()
44 dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM4749) && in bcma_core_mips_bcm5357b0_quirk()
45 dev->bus->chipinfo.pkg == 11 && in bcma_core_mips_bcm5357b0_quirk()
72 struct bcma_device *mdev = dev->bus->drv_mips.core; in bcma_core_mips_irq()
91 struct bcma_bus *bus = dev->bus; in bcma_core_mips_set_irq() local
92 struct bcma_device *mdev = bus->drv_mips.core; in bcma_core_mips_set_irq()
122 list_for_each_entry(core, &bus->cores, list) { in bcma_core_mips_set_irq()
134 bcma_debug(bus, "set_irq: core 0x%04x, irq %d => %d\n", in bcma_core_mips_set_irq()
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/linux/drivers/devfreq/
H A Dexynos-bus.c3 * Generic Exynos Bus frequency driver with DEVFREQ Framework
8 * This driver support Exynos Bus frequency feature by using
42 * Control the devfreq-event device to get the current state of bus
45 static int exynos_bus_##ops(struct exynos_bus *bus) \
49 for (i = 0; i < bus->edev_count; i++) { \
50 if (!bus->edev[i]) \
52 ret = devfreq_event_##ops(bus->edev[i]); \
63 static int exynos_bus_get_event(struct exynos_bus *bus, in exynos_bus_get_event() argument
70 for (i = 0; i < bus->edev_count; i++) { in exynos_bus_get_event()
71 if (!bus->edev[i]) in exynos_bus_get_event()
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/linux/arch/powerpc/platforms/pasemi/
H A Dgpio_mdio.c34 #define MDC_PIN(bus) (((struct gpio_priv *)bus->priv)->mdc_pin) argument
35 #define MDIO_PIN(bus) (((struct gpio_priv *)bus->priv)->mdio_pin) argument
37 static inline void mdio_lo(struct mii_bus *bus) in mdio_lo() argument
39 out_le32(gpio_regs+0x10, 1 << MDIO_PIN(bus)); in mdio_lo()
42 static inline void mdio_hi(struct mii_bus *bus) in mdio_hi() argument
44 out_le32(gpio_regs, 1 << MDIO_PIN(bus)); in mdio_hi()
47 static inline void mdc_lo(struct mii_bus *bus) in mdc_lo() argument
49 out_le32(gpio_regs+0x10, 1 << MDC_PIN(bus)); in mdc_lo()
52 static inline void mdc_hi(struct mii_bus *bus) in mdc_hi() argument
54 out_le32(gpio_regs, 1 << MDC_PIN(bus)); in mdc_hi()
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/linux/include/linux/device/
H A Dbus.h3 * bus.h - the bus-specific portions of the driver model
25 * struct bus_type - The bus type of the device
27 * @name: The name of the bus.
29 * @bus_groups: Default attributes of the bus.
30 * @dev_groups: Default attributes of the devices on the bus.
31 * @drv_groups: Default attributes of the device drivers on the bus.
33 * is added for this bus. It should return a positive value if the
40 * @probe: Called when a new device or driver add to this bus, and callback
49 * @remove: Called when a device removed from this bus.
55 * @suspend: Called when a device on this bus wants to go to sleep mode.
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/linux/sound/soc/intel/avs/
H A Dcore.c42 avs_hda_update_config_dword(struct hdac_bus *bus, u32 reg, u32 mask, u32 value) in avs_hda_update_config_dword() argument
44 struct pci_dev *pci = to_pci_dev(bus->dev); in avs_hda_update_config_dword()
60 static void avs_hdac_clock_gating_enable(struct hdac_bus *bus, bool enable) in avs_hdac_clock_gating_enable() argument
64 avs_hda_update_config_dword(bus, AZX_PCIREG_CGCTL, cgctl_mask, value); in avs_hdac_clock_gating_enable()
84 static int avs_hdac_bus_init_streams(struct hdac_bus *bus) in avs_hdac_bus_init_streams() argument
89 gcap = snd_hdac_chip_readw(bus, GCAP); in avs_hdac_bus_init_streams()
92 bus->num_streams = cp_streams + pb_streams; in avs_hdac_bus_init_streams()
94 snd_hdac_ext_stream_init_all(bus, 0, cp_streams, SNDRV_PCM_STREAM_CAPTURE); in avs_hdac_bus_init_streams()
95 snd_hdac_ext_stream_init_all(bus, cp_streams, pb_streams, SNDRV_PCM_STREAM_PLAYBACK); in avs_hdac_bus_init_streams()
97 return snd_hdac_bus_alloc_stream_pages(bus); in avs_hdac_bus_init_streams()
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/linux/drivers/net/wireless/broadcom/brcm80211/brcmfmac/
H A Dbus.h43 /* The level of bus communication with the dongle */
49 /* The level of bus communication with the dongle */
71 * struct brcmf_bus_ops - bus callback operations.
73 * @preinit: execute bus/device specific dongle init commands (optional).
83 * @gettxq: obtain a reference of bus transmit queue (optional).
91 * bus specific driver. For control messages to common driver
114 * struct brcmf_bus_msgbuf - bus ringbuf if in case of msgbuf.
136 * struct brcmf_bus_stats - bus statistic counters.
147 * struct brcmf_bus - interface structure between common and bus layer
149 * @bus_priv: pointer to private bus device.
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/linux/sound/hda/ext/
H A Dhdac_ext_controller.c24 * @bus: the pointer to HDAC bus object
27 void snd_hdac_ext_bus_ppcap_enable(struct hdac_bus *bus, bool enable) in snd_hdac_ext_bus_ppcap_enable() argument
30 if (!bus->ppcap) { in snd_hdac_ext_bus_ppcap_enable()
31 dev_err(bus->dev, "Address of PP capability is NULL"); in snd_hdac_ext_bus_ppcap_enable()
36 snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, in snd_hdac_ext_bus_ppcap_enable()
39 snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, in snd_hdac_ext_bus_ppcap_enable()
46 * @bus: the pointer to HDAC bus object
49 void snd_hdac_ext_bus_ppcap_int_enable(struct hdac_bus *bus, bool enable) in snd_hdac_ext_bus_ppcap_int_enable() argument
52 if (!bus->ppcap) { in snd_hdac_ext_bus_ppcap_int_enable()
53 dev_err(bus->dev, "Address of PP capability is NULL\n"); in snd_hdac_ext_bus_ppcap_int_enable()
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/linux/drivers/spmi/
H A Dspmi-pmic-arb.c135 * struct spmi_pmic_arb_bus - SPMI PMIC Arbiter Bus object
137 * @pmic_arb: the SPMI PMIC Arbiter the bus belongs to.
141 * @spmic: spmi controller registered for this bus
144 * bus instance
146 * particular SPMI bus instance
155 * @id: unique ID of the bus
230 int (*init_apid)(struct spmi_pmic_arb_bus *bus, int index);
231 int (*ppid_to_apid)(struct spmi_pmic_arb_bus *bus, u16 ppid);
233 int (*offset)(struct spmi_pmic_arb_bus *bus, u8 sid, u16 addr,
238 void __iomem *(*owner_acc_status)(struct spmi_pmic_arb_bus *bus, u8 m,
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/linux/Documentation/i2c/
H A Di2c-sysfs.rst12 kernel abstracts the MUX channels into logical I2C bus numbers. However, there
13 is a gap of knowledge to map from the I2C bus physical number and MUX topology
14 to logical I2C bus number. This doc is aimed to fill in this gap, so the
38 so you can find the I2C Sysfs under ``/sys/bus/i2c/devices``
43 the first number is I2C bus number, and the second number is I2C address.
47 blueline:/sys/bus/i2c/devices $ ls
51 ``i2c-2`` is an I2C bus whose number is 2, and ``2-0049`` is an I2C device
52 on bus 2 address 0x49 bound with a kernel driver.
59 (Physical) I2C Bus Controller
63 physical I2C bus controllers. The controllers are hardware and physical, and the
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