FSL QuadSPI controller supports Single, dual, quad modes of operation.
Mode information is available via "spi-tx-bus-width" and
"spi-rx-bus-width" nodes of device tree.
Update read hwcap capability by reading "spi-rx-bus-width".
Update write hwcap capability by reading "spi-tx-bus-width".
If value not provided in device tree file, then fallback to default
mode i.e. SNOR_HWCAPS_READ_1_1_4 and SNOR_HWCAPS_PP.
Signed-off-by: Prabhakar Kushwaha <prabhakar.kushwaha@xxxxxxx>
Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@xxxxxxx>
---
drivers/mtd/spi-nor/fsl-quadspi.c | 46 ++++++++++++++++++++++++++++++++++++---
1 file changed, 43 insertions(+), 3 deletions(-)
diff --git a/drivers/mtd/spi-nor/fsl-quadspi.c b/drivers/mtd/spi-nor/fsl-quadspi.c
index 11389d8..ff98e5a 100644
--- a/drivers/mtd/spi-nor/fsl-quadspi.c
+++ b/drivers/mtd/spi-nor/fsl-quadspi.c
@@ -979,8 +979,8 @@ static void fsl_qspi_unprep(struct spi_nor *nor, enum spi_nor_ops ops)
static int fsl_qspi_probe(struct platform_device *pdev)
{
- const struct spi_nor_hwcaps hwcaps = {
- .mask = SNOR_HWCAPS_READ_1_1_4 |
+ struct spi_nor_hwcaps hwcaps = {
+ .mask = SNOR_HWCAPS_READ_FAST |
SNOR_HWCAPS_PP,
};
struct device_node *np = pdev->dev.of_node;
@@ -989,7 +989,7 @@ static int fsl_qspi_probe(struct platform_device *pdev)
struct resource *res;
struct spi_nor *nor;
struct mtd_info *mtd;
- int ret, i = 0;
+ int ret, i = 0, value;
q = devm_kzalloc(dev, sizeof(*q), GFP_KERNEL);
if (!q)
@@ -1037,6 +1037,46 @@ static int fsl_qspi_probe(struct platform_device *pdev)
goto clk_failed;
}
+ if (!of_property_read_u32(np, "spi-rx-bus-width", &value)) {
+ switch (value) {
+ case 1:
+ hwcaps.mask |= SNOR_HWCAPS_READ |
+ SNOR_HWCAPS_READ_FAST;
+ break;
+ case 2:
+ hwcaps.mask |= SNOR_HWCAPS_READ_1_1_2 |
+ SNOR_HWCAPS_READ_1_2_2;
+ break;
+ case 4:
+ hwcaps.mask |= SNOR_HWCAPS_READ_1_1_4 |
+ SNOR_HWCAPS_READ_1_4_4;
+ break;
+ default:
+ dev_err(dev,
+ "spi-rx-bus-width %d not supported\n",
+ value);
+ break;
+ }
+ } else
+ hwcaps.mask |= SNOR_HWCAPS_READ_1_1_4;
+
+ if (!of_property_read_u32(np, "spi-tx-bus-width", &value)) {
+ switch (value) {
+ case 1:
+ hwcaps.mask |= SNOR_HWCAPS_PP;
+ break;
+ case 4:
+ hwcaps.mask |= SNOR_HWCAPS_PP_1_1_4 |
+ SNOR_HWCAPS_PP_1_4_4;
+ break;
+ default:
+ dev_err(dev,
+ "spi-tx-bus-width %d not supported\n",
+ value);
+ break;
+ }
+ }
+
/* find the irq */
ret = platform_get_irq(pdev, 0);
if (ret < 0) {
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
