diff options
Diffstat (limited to 'drivers/spi/spi-oc-tiny.c')
| -rw-r--r-- | drivers/spi/spi-oc-tiny.c | 50 |
1 files changed, 1 insertions, 49 deletions
diff --git a/drivers/spi/spi-oc-tiny.c b/drivers/spi/spi-oc-tiny.c index e2331eb7b47a..9df7c5979c29 100644 --- a/drivers/spi/spi-oc-tiny.c +++ b/drivers/spi/spi-oc-tiny.c @@ -20,7 +20,6 @@ #include <linux/spi/spi_bitbang.h> #include <linux/spi/spi_oc_tiny.h> #include <linux/io.h> -#include <linux/gpio.h> #include <linux/of.h> #define DRV_NAME "spi_oc_tiny" @@ -50,8 +49,6 @@ struct tiny_spi { unsigned int txc, rxc; const u8 *txp; u8 *rxp; - int gpio_cs_count; - int *gpio_cs; }; static inline struct tiny_spi *tiny_spi_to_hw(struct spi_device *sdev) @@ -66,16 +63,6 @@ static unsigned int tiny_spi_baud(struct spi_device *spi, unsigned int hz) return min(DIV_ROUND_UP(hw->freq, hz * 2), (1U << hw->baudwidth)) - 1; } -static void tiny_spi_chipselect(struct spi_device *spi, int is_active) -{ - struct tiny_spi *hw = tiny_spi_to_hw(spi); - - if (hw->gpio_cs_count > 0) { - gpio_set_value(hw->gpio_cs[spi->chip_select], - (spi->mode & SPI_CS_HIGH) ? is_active : !is_active); - } -} - static int tiny_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t) { @@ -203,24 +190,10 @@ static int tiny_spi_of_probe(struct platform_device *pdev) { struct tiny_spi *hw = platform_get_drvdata(pdev); struct device_node *np = pdev->dev.of_node; - unsigned int i; u32 val; if (!np) return 0; - hw->gpio_cs_count = of_gpio_count(np); - if (hw->gpio_cs_count > 0) { - hw->gpio_cs = devm_kcalloc(&pdev->dev, - hw->gpio_cs_count, sizeof(unsigned int), - GFP_KERNEL); - if (!hw->gpio_cs) - return -ENOMEM; - } - for (i = 0; i < hw->gpio_cs_count; i++) { - hw->gpio_cs[i] = of_get_gpio_flags(np, i, NULL); - if (hw->gpio_cs[i] < 0) - return -ENODEV; - } hw->bitbang.master->dev.of_node = pdev->dev.of_node; if (!of_property_read_u32(np, "clock-frequency", &val)) hw->freq = val; @@ -240,7 +213,6 @@ static int tiny_spi_probe(struct platform_device *pdev) struct tiny_spi_platform_data *platp = dev_get_platdata(&pdev->dev); struct tiny_spi *hw; struct spi_master *master; - unsigned int i; int err = -ENODEV; master = spi_alloc_master(&pdev->dev, sizeof(struct tiny_spi)); @@ -249,9 +221,9 @@ static int tiny_spi_probe(struct platform_device *pdev) /* setup the master state. */ master->bus_num = pdev->id; - master->num_chipselect = 255; master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; master->setup = tiny_spi_setup; + master->use_gpio_descriptors = true; hw = spi_master_get_devdata(master); platform_set_drvdata(pdev, hw); @@ -259,7 +231,6 @@ static int tiny_spi_probe(struct platform_device *pdev) /* setup the state for the bitbang driver */ hw->bitbang.master = master; hw->bitbang.setup_transfer = tiny_spi_setup_transfer; - hw->bitbang.chipselect = tiny_spi_chipselect; hw->bitbang.txrx_bufs = tiny_spi_txrx_bufs; /* find and map our resources */ @@ -279,12 +250,6 @@ static int tiny_spi_probe(struct platform_device *pdev) } /* find platform data */ if (platp) { - hw->gpio_cs_count = platp->gpio_cs_count; - hw->gpio_cs = platp->gpio_cs; - if (platp->gpio_cs_count && !platp->gpio_cs) { - err = -EBUSY; - goto exit; - } hw->freq = platp->freq; hw->baudwidth = platp->baudwidth; } else { @@ -292,13 +257,6 @@ static int tiny_spi_probe(struct platform_device *pdev) if (err) goto exit; } - for (i = 0; i < hw->gpio_cs_count; i++) { - err = gpio_request(hw->gpio_cs[i], dev_name(&pdev->dev)); - if (err) - goto exit_gpio; - gpio_direction_output(hw->gpio_cs[i], 1); - } - hw->bitbang.master->num_chipselect = max(1, hw->gpio_cs_count); /* register our spi controller */ err = spi_bitbang_start(&hw->bitbang); @@ -308,9 +266,6 @@ static int tiny_spi_probe(struct platform_device *pdev) return 0; -exit_gpio: - while (i-- > 0) - gpio_free(hw->gpio_cs[i]); exit: spi_master_put(master); return err; @@ -320,11 +275,8 @@ static int tiny_spi_remove(struct platform_device *pdev) { struct tiny_spi *hw = platform_get_drvdata(pdev); struct spi_master *master = hw->bitbang.master; - unsigned int i; spi_bitbang_stop(&hw->bitbang); - for (i = 0; i < hw->gpio_cs_count; i++) - gpio_free(hw->gpio_cs[i]); spi_master_put(master); return 0; } |