| Message ID | 20211226153624.162281-9-marcan@marcan.st |
|---|---|
| State | New |
| Headers | show |
| Series | brcmfmac: Support Apple T2 and M1 platforms | expand |
On Sun, Dec 26, 2021 at 4:37 PM Hector Martin <marcan@marcan.st> wrote: > On Apple ARM64 platforms, firmware selection requires two properties > that come from system firmware: the module-instance (aka "island", a > codename representing a given hardware platform) and the antenna-sku. > > The module-instance is hard-coded in per-board DTS files, while the > antenna-sku is forwarded by our bootloader from the Apple Device Tree > into the FDT. Grab them from the DT so firmware selection can use > them. > > The module-instance is used to construct a board_type by prepending it > with "apple,". > > Signed-off-by: Hector Martin <marcan@marcan.st> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Yours, Linus Walleij
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.h index 8b5f49997c8b..d4aa25d646fe 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.h +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.h @@ -50,6 +50,7 @@ struct brcmf_mp_device { bool ignore_probe_fail; struct brcmfmac_pd_cc *country_codes; const char *board_type; + const char *antenna_sku; union { struct brcmfmac_sdio_pd sdio; } bus; diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c index 513c7e6421b2..453a6cda5abb 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c @@ -63,14 +63,31 @@ void brcmf_of_probe(struct device *dev, enum brcmf_bus_type bus_type, { struct brcmfmac_sdio_pd *sdio = &settings->bus.sdio; struct device_node *root, *np = dev->of_node; + const char *prop; int irq; int err; u32 irqf; u32 val; + /* Apple ARM64 platforms have their own idea of board type, passed in + * via the device tree. They also have an antenna SKU parameter + */ + if (!of_property_read_string(np, "apple,module-instance", &prop)) { + const char *prefix = "apple,"; + int len = strlen(prefix) + strlen(prop) + 1; + char *board_type = devm_kzalloc(dev, len, GFP_KERNEL); + + strscpy(board_type, prefix, len); + strlcat(board_type, prop, len); + settings->board_type = board_type; + } + + if (!of_property_read_string(np, "apple,antenna-sku", &prop)) + settings->antenna_sku = devm_kstrdup(dev, prop, GFP_KERNEL); + /* Set board-type to the first string of the machine compatible prop */ root = of_find_node_by_path("/"); - if (root) { + if (root && !settings->board_type) { int i, len; char *board_type; const char *tmp;
On Apple ARM64 platforms, firmware selection requires two properties that come from system firmware: the module-instance (aka "island", a codename representing a given hardware platform) and the antenna-sku. The module-instance is hard-coded in per-board DTS files, while the antenna-sku is forwarded by our bootloader from the Apple Device Tree into the FDT. Grab them from the DT so firmware selection can use them. The module-instance is used to construct a board_type by prepending it with "apple,". Signed-off-by: Hector Martin <marcan@marcan.st> --- .../broadcom/brcm80211/brcmfmac/common.h | 1 + .../wireless/broadcom/brcm80211/brcmfmac/of.c | 19 ++++++++++++++++++- 2 files changed, 19 insertions(+), 1 deletion(-)