| Message ID | 20220104072658.69756-9-marcan@marcan.st (mailing list archive) |
|---|---|
| State | Handled Elsewhere, archived |
| Headers | show |
| Series | brcmfmac: Support Apple T2 and M1 platforms | expand |
On Tue, Jan 4, 2022 at 9:28 AM 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. > We map Apple's module codenames to board_types in the form > "apple,<module-instance>". > > The mapped board_type is added to the DTS file in that form, 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. > + /* 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, "brcm,board-type", &prop)) > + settings->board_type = devm_kstrdup(dev, prop, GFP_KERNEL); > + > + if (!of_property_read_string(np, "apple,antenna-sku", &prop)) > + settings->antenna_sku = devm_kstrdup(dev, prop, GFP_KERNEL); No error checks? But hold on, why do you need to copy them? Are you expecting this to be in DTO?
On 2022/01/04 20:17, Andy Shevchenko wrote: > On Tue, Jan 4, 2022 at 9:28 AM 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. >> We map Apple's module codenames to board_types in the form >> "apple,<module-instance>". >> >> The mapped board_type is added to the DTS file in that form, 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. > >> + /* 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, "brcm,board-type", &prop)) >> + settings->board_type = devm_kstrdup(dev, prop, GFP_KERNEL); >> + >> + if (!of_property_read_string(np, "apple,antenna-sku", &prop)) >> + settings->antenna_sku = devm_kstrdup(dev, prop, GFP_KERNEL); > > No error checks? > But hold on, why do you need to copy them? Are you expecting this to be in DTO? Yeah, I was wondering about that... indeed it shouldn't be necessary to copy them.
On 1/4/2022 8:26 AM, Hector Martin 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. > We map Apple's module codenames to board_types in the form > "apple,<module-instance>". > > The mapped board_type is added to the DTS file in that form, 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. Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com> > Reviewed-by: Linus Walleij <linus.walleij@linaro.org> > Signed-off-by: Hector Martin <marcan@marcan.st> > --- > .../wireless/broadcom/brcm80211/brcmfmac/common.h | 1 + > .../net/wireless/broadcom/brcm80211/brcmfmac/of.c | 12 +++++++++++- > 2 files changed, 12 insertions(+), 1 deletion(-) > > 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..085d34176b78 100644 > --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c > +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c > @@ -63,14 +63,24 @@ 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, "brcm,board-type", &prop)) > + settings->board_type = devm_kstrdup(dev, prop, GFP_KERNEL); > + > + 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("/"); I assume this only returns NULL when there is no device tree. Is that a safe assumption (Rob)? If so you could bail out here if root is NULL... > - if (root) { > + if (root && !settings->board_type) { ...and only check the board_type here. Or only check board_type and lookup the root node inside this if-statement if it is not needed elsewhere in this probe function. > int i, len; > char *board_type; > const char *tmp;
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..085d34176b78 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c @@ -63,14 +63,24 @@ 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, "brcm,board-type", &prop)) + settings->board_type = devm_kstrdup(dev, prop, GFP_KERNEL); + + 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;