From: Jérôme Pouiller <jerome.pouiller@xxxxxxxxxx>
Since the WF200 VID/PID are not reliable, it's recommended to declare it
in the DT. Until now, if the device was not declared, the driver just
printed a warning and continue. But, the risk of a collision is too
high, the driver now returns an error.
Signed-off-by: Jérôme Pouiller <jerome.pouiller@xxxxxxxxxx>
---
drivers/staging/wfx/Kconfig | 4 ++++
drivers/staging/wfx/bus_sdio.c | 21 ++++++---------------
2 files changed, 10 insertions(+), 15 deletions(-)
diff --git a/drivers/staging/wfx/Kconfig b/drivers/staging/wfx/Kconfig
index 01ea09cb9697..835a855409d8 100644
--- a/drivers/staging/wfx/Kconfig
+++ b/drivers/staging/wfx/Kconfig
@@ -7,3 +7,7 @@ config WFX
help
This is a driver for Silicons Labs WFxxx series (WF200 and further)
chipsets. This chip can be found on SPI or SDIO buses.
+
+ Silabs does not use a reliable SDIO vendor ID. So, to avoid conflicts,
+ the driver won't probe the device if it is not also declared in the
+ Device Tree.
diff --git a/drivers/staging/wfx/bus_sdio.c b/drivers/staging/wfx/bus_sdio.c
index 6ea573221ab1..bc3df85a05b6 100644
--- a/drivers/staging/wfx/bus_sdio.c
+++ b/drivers/staging/wfx/bus_sdio.c
@@ -204,24 +204,17 @@ static int wfx_sdio_probe(struct sdio_func *func, const struct sdio_device_id *i
return -ENODEV;
}
+ if (!pdata) {
+ dev_warn(&func->dev, "no compatible device found in DT\n");
+ return -ENODEV;
+ }
+
bus = devm_kzalloc(&func->dev, sizeof(*bus), GFP_KERNEL);
if (!bus)
return -ENOMEM;
- if (np) {
- if (!of_match_node(wfx_sdio_of_match, np)) {
- dev_warn(&func->dev, "no compatible device found in DT\n");
- return -ENODEV;
- }
- bus->of_irq = irq_of_parse_and_map(np, 0);
- } else {
- dev_warn(&func->dev,
- "device is not declared in DT, features will be limited\n");
- /* FIXME: ignore VID/PID and only rely on device tree */
- // return -ENODEV;
- }
-
bus->func = func;
+ bus->of_irq = irq_of_parse_and_map(np, 0);
sdio_set_drvdata(func, bus);
func->card->quirks |= MMC_QUIRK_LENIENT_FN0 |
MMC_QUIRK_BLKSZ_FOR_BYTE_MODE |
@@ -268,8 +261,6 @@ static void wfx_sdio_remove(struct sdio_func *func)
#define SDIO_DEVICE_ID_SILABS_WF200 0x1000
static const struct sdio_device_id wfx_sdio_ids[] = {
{ SDIO_DEVICE(SDIO_VENDOR_ID_SILABS, SDIO_DEVICE_ID_SILABS_WF200) },
- /* FIXME: ignore VID/PID and only rely on device tree */
- // { SDIO_DEVICE(SDIO_ANY_ID, SDIO_ANY_ID) },
{ },
};
MODULE_DEVICE_TABLE(sdio, wfx_sdio_ids);
--
2.34.1
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