[PATCH v2] spi: sh-msiof: request and set cs-gpio direction to output

[Ulrich Hecht]

Required for the CS signal to actually be visible to the device.

Signed-off-by: Ulrich Hecht <ulrich.hecht+rene...@gmail.com>
---

This revision uses devm_gpio_request_one() instead of gpio_request()/
gpio_direction_output(), as suggested by Geert.

CU
Uli


 drivers/spi/spi-sh-msiof.c | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index 6852552a..ed01289 100644
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c
@@ -541,15 +541,32 @@ static int sh_msiof_spi_setup(struct spi_device *spi)
                                  !!(spi->mode & SPI_LSB_FIRST),
                                  !!(spi->mode & SPI_CS_HIGH));
 
-       if (spi->cs_gpio >= 0)
-               gpio_set_value(spi->cs_gpio, !(spi->mode & SPI_CS_HIGH));
+       if (spi->cs_gpio >= 0 && !spi_get_ctldata(spi)) {
+               int ret = devm_gpio_request_one(&p->pdev->dev, spi->cs_gpio,
+                               spi->mode & SPI_CS_HIGH ? GPIOF_OUT_INIT_LOW :
+                               GPIOF_OUT_INIT_HIGH, dev_name(&spi->dev));
+
+               if (ret < 0)
+                       return ret;
 
+               spi_set_ctldata(spi, (void *)spi->cs_gpio);
+       }
 
        pm_runtime_put(&p->pdev->dev);
 
        return 0;
 }
 
+static void sh_msiof_spi_cleanup(struct spi_device *spi)
+{
+       struct sh_msiof_spi_priv *p = spi_master_get_devdata(spi->master);
+
+       if (spi->cs_gpio >= 0)
+               devm_gpio_free(&p->pdev->dev, spi->cs_gpio);
+
+       spi_set_ctldata(spi, NULL);
+}
+
 static int sh_msiof_prepare_message(struct spi_master *master,
                                    struct spi_message *msg)
 {
@@ -1263,6 +1280,7 @@ static int sh_msiof_spi_probe(struct platform_device 
*pdev)
        master->dev.of_node = pdev->dev.of_node;
        master->num_chipselect = p->info->num_chipselect;
        master->setup = sh_msiof_spi_setup;
+       master->cleanup = sh_msiof_spi_cleanup;
        master->prepare_message = sh_msiof_prepare_message;
        master->bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 32);
        master->auto_runtime_pm = true;
-- 
2.9.3