diff options
Diffstat (limited to 'drivers/spi/spi.c')
| -rw-r--r-- | drivers/spi/spi.c | 96 |
1 files changed, 74 insertions, 22 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 5d046be8b2dd..19688f333e0b 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -360,6 +360,18 @@ const struct spi_device_id *spi_get_device_id(const struct spi_device *sdev) } EXPORT_SYMBOL_GPL(spi_get_device_id); +const void *spi_get_device_match_data(const struct spi_device *sdev) +{ + const void *match; + + match = device_get_match_data(&sdev->dev); + if (match) + return match; + + return (const void *)spi_get_device_id(sdev)->driver_data; +} +EXPORT_SYMBOL_GPL(spi_get_device_match_data); + static int spi_match_device(struct device *dev, struct device_driver *drv) { const struct spi_device *spi = to_spi_device(dev); @@ -592,7 +604,7 @@ static void spi_dev_set_name(struct spi_device *spi) } dev_set_name(&spi->dev, "%s.%u", dev_name(&spi->controller->dev), - spi->chip_select); + spi_get_chipselect(spi, 0)); } static int spi_dev_check(struct device *dev, void *data) @@ -601,7 +613,7 @@ static int spi_dev_check(struct device *dev, void *data) struct spi_device *new_spi = data; if (spi->controller == new_spi->controller && - spi->chip_select == new_spi->chip_select) + spi_get_chipselect(spi, 0) == spi_get_chipselect(new_spi, 0)) return -EBUSY; return 0; } @@ -626,7 +638,7 @@ static int __spi_add_device(struct spi_device *spi) status = bus_for_each_dev(&spi_bus_type, NULL, spi, spi_dev_check); if (status) { dev_err(dev, "chipselect %d already in use\n", - spi->chip_select); + spi_get_chipselect(spi, 0)); return status; } @@ -637,7 +649,7 @@ static int __spi_add_device(struct spi_device *spi) } if (ctlr->cs_gpiods) - spi->cs_gpiod = ctlr->cs_gpiods[spi->chip_select]; + spi_set_csgpiod(spi, 0, ctlr->cs_gpiods[spi_get_chipselect(spi, 0)]); /* * Drivers may modify this initial i/o setup, but will @@ -680,8 +692,8 @@ int spi_add_device(struct spi_device *spi) int status; /* Chipselects are numbered 0..max; validate. */ - if (spi->chip_select >= ctlr->num_chipselect) { - dev_err(dev, "cs%d >= max %d\n", spi->chip_select, + if (spi_get_chipselect(spi, 0) >= ctlr->num_chipselect) { + dev_err(dev, "cs%d >= max %d\n", spi_get_chipselect(spi, 0), ctlr->num_chipselect); return -EINVAL; } @@ -702,8 +714,8 @@ static int spi_add_device_locked(struct spi_device *spi) struct device *dev = ctlr->dev.parent; /* Chipselects are numbered 0..max; validate. */ - if (spi->chip_select >= ctlr->num_chipselect) { - dev_err(dev, "cs%d >= max %d\n", spi->chip_select, + if (spi_get_chipselect(spi, 0) >= ctlr->num_chipselect) { + dev_err(dev, "cs%d >= max %d\n", spi_get_chipselect(spi, 0), ctlr->num_chipselect); return -EINVAL; } @@ -749,7 +761,7 @@ struct spi_device *spi_new_device(struct spi_controller *ctlr, WARN_ON(strlen(chip->modalias) >= sizeof(proxy->modalias)); - proxy->chip_select = chip->chip_select; + spi_set_chipselect(proxy, 0, chip->chip_select); proxy->max_speed_hz = chip->max_speed_hz; proxy->mode = chip->mode; proxy->irq = chip->irq; @@ -958,24 +970,23 @@ static void spi_set_cs(struct spi_device *spi, bool enable, bool force) * Avoid calling into the driver (or doing delays) if the chip select * isn't actually changing from the last time this was called. */ - if (!force && ((enable && spi->controller->last_cs == spi->chip_select) || - (!enable && spi->controller->last_cs != spi->chip_select)) && + if (!force && ((enable && spi->controller->last_cs == spi_get_chipselect(spi, 0)) || + (!enable && spi->controller->last_cs != spi_get_chipselect(spi, 0))) && (spi->controller->last_cs_mode_high == (spi->mode & SPI_CS_HIGH))) return; trace_spi_set_cs(spi, activate); - spi->controller->last_cs = enable ? spi->chip_select : -1; + spi->controller->last_cs = enable ? spi_get_chipselect(spi, 0) : -1; spi->controller->last_cs_mode_high = spi->mode & SPI_CS_HIGH; - if ((spi->cs_gpiod || !spi->controller->set_cs_timing) && !activate) { + if ((spi_get_csgpiod(spi, 0) || !spi->controller->set_cs_timing) && !activate) spi_delay_exec(&spi->cs_hold, NULL); - } if (spi->mode & SPI_CS_HIGH) enable = !enable; - if (spi->cs_gpiod) { + if (spi_get_csgpiod(spi, 0)) { if (!(spi->mode & SPI_NO_CS)) { /* * Historically ACPI has no means of the GPIO polarity and @@ -988,10 +999,10 @@ static void spi_set_cs(struct spi_device *spi, bool enable, bool force) * into account. */ if (has_acpi_companion(&spi->dev)) - gpiod_set_value_cansleep(spi->cs_gpiod, !enable); + gpiod_set_value_cansleep(spi_get_csgpiod(spi, 0), !enable); else /* Polarity handled by GPIO library */ - gpiod_set_value_cansleep(spi->cs_gpiod, activate); + gpiod_set_value_cansleep(spi_get_csgpiod(spi, 0), activate); } /* Some SPI masters need both GPIO CS & slave_select */ if ((spi->controller->flags & SPI_MASTER_GPIO_SS) && @@ -1001,7 +1012,7 @@ static void spi_set_cs(struct spi_device *spi, bool enable, bool force) spi->controller->set_cs(spi, !enable); } - if (spi->cs_gpiod || !spi->controller->set_cs_timing) { + if (spi_get_csgpiod(spi, 0) || !spi->controller->set_cs_timing) { if (activate) spi_delay_exec(&spi->cs_setup, NULL); else @@ -1625,6 +1636,10 @@ static int __spi_pump_transfer_message(struct spi_controller *ctlr, pm_runtime_put_noidle(ctlr->dev.parent); dev_err(&ctlr->dev, "Failed to power device: %d\n", ret); + + msg->status = ret; + spi_finalize_current_message(ctlr); + return ret; } } @@ -2291,7 +2306,7 @@ static int of_spi_parse_dt(struct spi_controller *ctlr, struct spi_device *spi, nc, rc); return rc; } - spi->chip_select = value; + spi_set_chipselect(spi, 0, value); /* Device speed */ if (!of_property_read_u32(nc, "spi-max-frequency", &value)) @@ -2405,7 +2420,7 @@ struct spi_device *spi_new_ancillary_device(struct spi_device *spi, strscpy(ancillary->modalias, "dummy", sizeof(ancillary->modalias)); /* Use provided chip-select for ancillary device */ - ancillary->chip_select = chip_select; + spi_set_chipselect(ancillary, 0, chip_select); /* Take over SPI mode/speed from SPI main device */ ancillary->max_speed_hz = spi->max_speed_hz; @@ -2652,7 +2667,7 @@ struct spi_device *acpi_spi_device_alloc(struct spi_controller *ctlr, spi->mode |= lookup.mode; spi->irq = lookup.irq; spi->bits_per_word = lookup.bits_per_word; - spi->chip_select = lookup.chip_select; + spi_set_chipselect(spi, 0, lookup.chip_select); return spi; } @@ -3612,6 +3627,37 @@ static int __spi_validate_bits_per_word(struct spi_controller *ctlr, } /** + * spi_set_cs_timing - configure CS setup, hold, and inactive delays + * @spi: the device that requires specific CS timing configuration + * + * Return: zero on success, else a negative error code. + */ +static int spi_set_cs_timing(struct spi_device *spi) +{ + struct device *parent = spi->controller->dev.parent; + int status = 0; + + if (spi->controller->set_cs_timing && !spi_get_csgpiod(spi, 0)) { + if (spi->controller->auto_runtime_pm) { + status = pm_runtime_get_sync(parent); + if (status < 0) { + pm_runtime_put_noidle(parent); + dev_err(&spi->controller->dev, "Failed to power device: %d\n", + status); + return status; + } + + status = spi->controller->set_cs_timing(spi); + pm_runtime_mark_last_busy(parent); + pm_runtime_put_autosuspend(parent); + } else { + status = spi->controller->set_cs_timing(spi); + } + } + return status; +} + +/** * spi_setup - setup SPI mode and clock rate * @spi: the device whose settings are being modified * Context: can sleep, and no requests are queued to the device @@ -3707,6 +3753,12 @@ int spi_setup(struct spi_device *spi) } } + status = spi_set_cs_timing(spi); + if (status) { + mutex_unlock(&spi->controller->io_mutex); + return status; + } + if (spi->controller->auto_runtime_pm && spi->controller->set_cs) { status = pm_runtime_resume_and_get(spi->controller->dev.parent); if (status < 0) { @@ -3790,7 +3842,7 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message) * cs_change is set for each transfer. */ if ((spi->mode & SPI_CS_WORD) && (!(ctlr->mode_bits & SPI_CS_WORD) || - spi->cs_gpiod)) { + spi_get_csgpiod(spi, 0))) { size_t maxsize; int ret; |