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author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2021-05-17 17:03:45 +0300 |
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committer | Mark Brown <broonie@kernel.org> | 2021-05-18 14:05:31 +0100 |
commit | de6926f307e7ff605f3e37f11a4b3cc20c85c365 (patch) | |
tree | 4268f887e9355b68af2c39f24827e99f53ae5e42 /drivers/spi | |
parent | 778c12e69481d544e6fcfa45b23ae3c5379b5a02 (diff) | |
download | linux-de6926f307e7ff605f3e37f11a4b3cc20c85c365.tar.gz linux-de6926f307e7ff605f3e37f11a4b3cc20c85c365.tar.bz2 linux-de6926f307e7ff605f3e37f11a4b3cc20c85c365.zip |
spi: pxa2xx: Switch to use SPI core GPIO (legacy) CS handling
SPI core has been already providing the GPIO CS handling. Use it.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210517140351.901-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r-- | drivers/spi/spi-pxa2xx.c | 59 | ||||
-rw-r--r-- | drivers/spi/spi-pxa2xx.h | 12 |
2 files changed, 32 insertions, 39 deletions
diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index d19cea4ed946..1a0bcd3bac1f 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -441,11 +441,6 @@ static void cs_assert(struct spi_device *spi) return; } - if (chip->gpiod_cs) { - gpiod_set_value(chip->gpiod_cs, chip->gpio_cs_inverted); - return; - } - if (is_lpss_ssp(drv_data)) lpss_ssp_cs_control(spi, true); } @@ -471,11 +466,6 @@ static void cs_deassert(struct spi_device *spi) return; } - if (chip->gpiod_cs) { - gpiod_set_value(chip->gpiod_cs, !chip->gpio_cs_inverted); - return; - } - if (is_lpss_ssp(drv_data)) lpss_ssp_cs_control(spi, false); } @@ -1195,11 +1185,19 @@ static int pxa2xx_spi_unprepare_transfer(struct spi_controller *controller) return 0; } +static void cleanup_cs(struct spi_device *spi) +{ + if (!gpio_is_valid(spi->cs_gpio)) + return; + + gpio_free(spi->cs_gpio); + spi->cs_gpio = -ENOENT; +} + static int setup_cs(struct spi_device *spi, struct chip_data *chip, struct pxa2xx_spi_chip *chip_info) { - struct gpio_desc *gpiod; - int err = 0; + struct driver_data *drv_data = spi_controller_get_devdata(spi->controller); if (chip == NULL) return 0; @@ -1207,13 +1205,13 @@ static int setup_cs(struct spi_device *spi, struct chip_data *chip, if (chip_info == NULL) return 0; + if (drv_data->ssp_type == CE4100_SSP) + return 0; + /* NOTE: setup() can be called multiple times, possibly with * different chip_info, release previously requested GPIO */ - if (chip->gpiod_cs) { - gpiod_put(chip->gpiod_cs); - chip->gpiod_cs = NULL; - } + cleanup_cs(spi); /* If (*cs_control) is provided, ignore GPIO chip select */ if (chip_info->cs_control) { @@ -1222,21 +1220,25 @@ static int setup_cs(struct spi_device *spi, struct chip_data *chip, } if (gpio_is_valid(chip_info->gpio_cs)) { - err = gpio_request(chip_info->gpio_cs, "SPI_CS"); + int gpio = chip_info->gpio_cs; + int err; + + err = gpio_request(gpio, "SPI_CS"); if (err) { - dev_err(&spi->dev, "failed to request chip select GPIO%d\n", - chip_info->gpio_cs); + dev_err(&spi->dev, "failed to request chip select GPIO%d\n", gpio); return err; } - gpiod = gpio_to_desc(chip_info->gpio_cs); - chip->gpiod_cs = gpiod; - chip->gpio_cs_inverted = spi->mode & SPI_CS_HIGH; + err = gpio_direction_output(gpio, !(spi->mode & SPI_CS_HIGH)); + if (err) { + gpio_free(gpio); + return err; + } - err = gpiod_direction_output(gpiod, !chip->gpio_cs_inverted); + spi->cs_gpio = gpio; } - return err; + return 0; } static int setup(struct spi_device *spi) @@ -1411,15 +1413,8 @@ static int setup(struct spi_device *spi) static void cleanup(struct spi_device *spi) { struct chip_data *chip = spi_get_ctldata(spi); - struct driver_data *drv_data = - spi_controller_get_devdata(spi->controller); - - if (!chip) - return; - - if (drv_data->ssp_type != CE4100_SSP && chip->gpiod_cs) - gpiod_put(chip->gpiod_cs); + cleanup_cs(spi); kfree(chip); } diff --git a/drivers/spi/spi-pxa2xx.h b/drivers/spi/spi-pxa2xx.h index 672dfd4863cc..a91fe6edb275 100644 --- a/drivers/spi/spi-pxa2xx.h +++ b/drivers/spi/spi-pxa2xx.h @@ -62,19 +62,17 @@ struct chip_data { u32 dds_rate; u32 timeout; u8 n_bytes; + u8 enable_dma; u32 dma_burst_size; - u32 threshold; u32 dma_threshold; + u32 threshold; u16 lpss_rx_threshold; u16 lpss_tx_threshold; - u8 enable_dma; - union { - struct gpio_desc *gpiod_cs; - unsigned int frm; - }; - int gpio_cs_inverted; + int (*write)(struct driver_data *drv_data); int (*read)(struct driver_data *drv_data); + + unsigned int frm; void (*cs_control)(u32 command); }; |