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authorMurali Karicheri <m-karicheri2@ti.com>2014-07-31 17:33:14 (GMT)
committerMark Brown <broonie@linaro.org>2014-07-31 19:35:32 (GMT)
commit7480e755c6e6e890200e8998597e8d0baa51fa8e (patch)
treea8f0da48dffdc24fe0958843848621457d415bfe /drivers/spi
parent7171511eaec5bf23fb06078f59784a3a0626b38f (diff)
downloadlinux-7480e755c6e6e890200e8998597e8d0baa51fa8e.tar.xz
spi: davinci: fix to support more than 2 chip selects
Currently, the driver defines SPI_MAX_CHIPSELECT as 2 and use per device array bytes_per_word based on this. This breaks if num_chipselect per device is greater than 2. This patch fix this and allocate memory for this array based on num_chipselect. It's preparation patch to enable GPIO CS feature for Davinci SPI. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-davinci.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c
index 50f7509..2477af4 100644
--- a/drivers/spi/spi-davinci.c
+++ b/drivers/spi/spi-davinci.c
@@ -38,8 +38,6 @@
#define SPI_NO_RESOURCE ((resource_size_t)-1)
-#define SPI_MAX_CHIPSELECT 2
-
#define CS_DEFAULT 0xFF
#define SPIFMT_PHASE_MASK BIT(16)
@@ -142,7 +140,7 @@ struct davinci_spi {
void (*get_rx)(u32 rx_data, struct davinci_spi *);
u32 (*get_tx)(struct davinci_spi *);
- u8 bytes_per_word[SPI_MAX_CHIPSELECT];
+ u8 *bytes_per_word;
};
static struct davinci_spi_config davinci_spi_default_cfg;
@@ -876,6 +874,14 @@ static int davinci_spi_probe(struct platform_device *pdev)
/* pdata in dspi is now updated and point pdata to that */
pdata = &dspi->pdata;
+ dspi->bytes_per_word = devm_kzalloc(&pdev->dev,
+ sizeof(*dspi->bytes_per_word) *
+ pdata->num_chipselect, GFP_KERNEL);
+ if (dspi->bytes_per_word == NULL) {
+ ret = -ENOMEM;
+ goto free_master;
+ }
+
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (r == NULL) {
ret = -ENOENT;