staging: wfx: map 'compatible' attribute with board name

"WF200" only designates the chip. To make a WiFi board, the chip must be
associated with an antenna. The antenna configuration is located in
separate files (aka PDS files in Silabs wording). Currently, user has to
write in his DT something like:

    compatible = "silabs,wf200";
    config = "brd4001a.pds";

It is far better to embed a list of known boards (chip + antenna) in the
driver. So the user just have to declare:

    compatible = "silabs,brd4001a";

This patch add the configurations for the evaluation boards sold by
Silabs. To provide a full plug-and-play experience, the associated PDS
files[1] will be available in linux-firmware.

This patch does not break compatibility with existing setups.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20220113085524.1110708-28-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 44 insertions, 8 deletions

diff --git a/drivers/staging/wfx/bus_spi.c b/drivers/staging/wfx/bus_spi.c
index 417bb74c88b9..9aa52d76cdda 100644
--- a/drivers/staging/wfx/bus_spi.c
+++ b/drivers/staging/wfx/bus_spi.c
@@ -23,12 +23,36 @@
 #define SET_WRITE 0x7FFF        /* usage: and operation */
 #define SET_READ 0x8000         /* usage: or operation */
 
-#define WFX_RESET_INVERTED 1
+static const struct wfx_platform_data pdata_wf200 = {
+	.file_fw = "wfm_wf200",
+	.file_pds = "wf200.pds",
+	.use_rising_clk = true,
+};
+
+static const struct wfx_platform_data pdata_brd4001a = {
+	.file_fw = "wfm_wf200",
+	.file_pds = "brd4001a.pds",
+	.use_rising_clk = true,
+};
+
+static const struct wfx_platform_data pdata_brd8022a = {
+	.file_fw = "wfm_wf200",
+	.file_pds = "brd8022a.pds",
+	.use_rising_clk = true,
+};
 
-static const struct wfx_platform_data wfx_spi_pdata = {
+static const struct wfx_platform_data pdata_brd8023a = {
+	.file_fw = "wfm_wf200",
+	.file_pds = "brd8023a.pds",
+	.use_rising_clk = true,
+};
+
+/* Legacy DT don't use it */
+static const struct wfx_platform_data pdata_wfx_spi = {
 	.file_fw = "wfm_wf200",
 	.file_pds = "wf200.pds",
 	.use_rising_clk = true,
+	.reset_inverted = true,
 };
 
 struct wfx_spi_priv {
@@ -175,6 +199,7 @@ static const struct wfx_hwbus_ops wfx_spi_hwbus_ops = {
 
 static int wfx_spi_probe(struct spi_device *func)
 {
+	struct wfx_platform_data *pdata;
 	struct wfx_spi_priv *bus;
 	int ret;
 
@@ -183,6 +208,12 @@ static int wfx_spi_probe(struct spi_device *func)
 	ret = spi_setup(func);
 	if (ret)
 		return ret;
+	pdata = (struct wfx_platform_data *)spi_get_device_id(func)->driver_data;
+	if (!pdata) {
+		dev_err(&func->dev, "unable to retrieve driver data (please report)\n");
+		return -ENODEV;
+	}
+
 	/* Trace below is also displayed by spi_setup() if compiled with DEBUG */
 	dev_dbg(&func->dev, "SPI params: CS=%d, mode=%d bits/word=%d speed=%d\n",
 		func->chip_select, func->mode, func->bits_per_word, func->max_speed_hz);
@@ -206,7 +237,7 @@ static int wfx_spi_probe(struct spi_device *func)
 		dev_warn(&func->dev, "gpio reset is not defined, trying to load firmware anyway\n");
 	} else {
 		gpiod_set_consumer_name(bus->gpio_reset, "wfx reset");
-		if (spi_get_device_id(func)->driver_data & WFX_RESET_INVERTED)
+		if (pdata->reset_inverted)
 			gpiod_toggle_active_low(bus->gpio_reset);
 		gpiod_set_value_cansleep(bus->gpio_reset, 1);
 		usleep_range(100, 150);
@@ -214,8 +245,7 @@ static int wfx_spi_probe(struct spi_device *func)
 		usleep_range(2000, 2500);
 	}
 
-	bus->core = wfx_init_common(&func->dev, &wfx_spi_pdata,
-				    &wfx_spi_hwbus_ops, bus);
+	bus->core = wfx_init_common(&func->dev, pdata, &wfx_spi_hwbus_ops, bus);
 	if (!bus->core)
 		return -EIO;
 
@@ -235,16 +265,22 @@ static int wfx_spi_remove(struct spi_device *func)
  * stripped.
  */
 static const struct spi_device_id wfx_spi_id[] = {
-	{ "wfx-spi", WFX_RESET_INVERTED },
-	{ "wf200", 0 },
+	{ "wf200",    (kernel_ulong_t)&pdata_wf200 },
+	{ "brd4001a", (kernel_ulong_t)&pdata_brd4001a },
+	{ "brd8022a", (kernel_ulong_t)&pdata_brd8022a },
+	{ "brd8023a", (kernel_ulong_t)&pdata_brd8023a },
+	{ "wfx-spi",  (kernel_ulong_t)&pdata_wfx_spi },
 	{ },
 };
 MODULE_DEVICE_TABLE(spi, wfx_spi_id);
 
 #ifdef CONFIG_OF
 static const struct of_device_id wfx_spi_of_match[] = {
-	{ .compatible = "silabs,wfx-spi", .data = (void *)WFX_RESET_INVERTED },
 	{ .compatible = "silabs,wf200" },
+	{ .compatible = "silabs,brd4001a" },
+	{ .compatible = "silabs,brd8022a" },
+	{ .compatible = "silabs,brd8023a" },
+	{ .compatible = "silabs,wfx-spi" },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, wfx_spi_of_match);