> -----Original Message-----
> From: Jacobe Zang <jacobe.zang@xxxxxxxxxx>
> Sent: Saturday, August 10, 2024 9:22 AM
> To: robh@xxxxxxxxxx; krzk+dt@xxxxxxxxxx; heiko@xxxxxxxxx;
> kvalo@xxxxxxxxxx; davem@xxxxxxxxxxxxx; edumazet@xxxxxxxxxx;
> kuba@xxxxxxxxxx; pabeni@xxxxxxxxxx; conor+dt@xxxxxxxxxx;
> arend.vanspriel@xxxxxxxxxxxx
> Cc: efectn@xxxxxxxxxxxxxx; dsimic@xxxxxxxxxxx; jagan@xxxxxxxxxx;
> devicetree@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; linux-
> rockchip@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> arend@xxxxxxxxxxxx; linux-wireless@xxxxxxxxxxxxxxx;
> netdev@xxxxxxxxxxxxxxx; megi@xxxxxx; duoming@xxxxxxxxxx;
> bhelgaas@xxxxxxxxxx; minipli@xxxxxxxxxxxxxx; brcm80211@xxxxxxxxxxxxxxx;
> brcm80211-dev-list.pdl@xxxxxxxxxxxx; nick@xxxxxxxxxx; Jacobe Zang
> <jacobe.zang@xxxxxxxxxx>
> Subject: [PATCH v9 4/5] wifi: brcmfmac: Add optional lpo clock
> enable support
>
> WiFi modules often require 32kHz clock to function. Add support to enable
> the clock to PCIe driver and move "brcm,bcm4329-fmac" check to the top of
> brcmf_of_probe. Change function prototypes from void to int and add
> appropriate errno's for return
> WiFi modules often require 32kHz clock to function. Add support to enable
> the clock to PCIe driver and move "brcm,bcm4329-fmac" check to the top of
> brcmf_of_probe. Change function prototypes from void to int and add
> appropriate errno's for return values that will be send to bus when error
> occurred.
>
> Co-developed-by: Ondrej Jirman <megi@xxxxxx>
> Signed-off-by: Ondrej Jirman <megi@xxxxxx>
> Co-developed-by: Arend van Spriel <arend.vanspriel@xxxxxxxxxxxx>
> Signed-off-by: Arend van Spriel <arend.vanspriel@xxxxxxxxxxxx>
> Signed-off-by: Jacobe Zang <jacobe.zang@xxxxxxxxxx>
> ---
> .../broadcom/brcm80211/brcmfmac/bcmsdh.c | 4 +-
> .../broadcom/brcm80211/brcmfmac/common.c | 3 +-
> .../wireless/broadcom/brcm80211/brcmfmac/of.c | 53 +++++++++++--------
> .../wireless/broadcom/brcm80211/brcmfmac/of.h | 9 ++--
> .../broadcom/brcm80211/brcmfmac/pcie.c | 3 ++
> .../broadcom/brcm80211/brcmfmac/sdio.c | 24 ++++++---
> .../broadcom/brcm80211/brcmfmac/usb.c | 3 ++
> 7 files changed, 63 insertions(+), 36 deletions(-)
>
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> index 13391c2d82aae..b2ede4e579c5c 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> @@ -947,8 +947,8 @@ int brcmf_sdiod_probe(struct brcmf_sdio_dev
> *sdiodev)
>
> /* try to attach to the target device */
> sdiodev->bus = brcmf_sdio_probe(sdiodev);
> - if (!sdiodev->bus) {
> - ret = -ENODEV;
> + if (IS_ERR(sdiodev->bus)) {
> + ret = PTR_ERR(sdiodev->bus);
> goto out;
> }
> brcmf_sdiod_host_fixup(sdiodev->func2->card->host);
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c
> b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c
> index b24faae35873d..58d50918dd177 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c
> @@ -561,7 +561,8 @@ struct brcmf_mp_device
> *brcmf_get_module_param(struct device *dev,
> if (!found) {
> /* No platform data for this device, try OF and DMI data */
> brcmf_dmi_probe(settings, chip, chiprev);
> - brcmf_of_probe(dev, bus_type, settings);
> + if (brcmf_of_probe(dev, bus_type, settings) == -
> EPROBE_DEFER)
> + return ERR_PTR(-EPROBE_DEFER);
> brcmf_acpi_probe(dev, bus_type, settings);
> }
> return settings;
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c
> b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c
> index e406e11481a62..f19dc7355e0e8 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c
> @@ -6,6 +6,7 @@
> #include <linux/of.h>
> #include <linux/of_irq.h>
> #include <linux/of_net.h>
> +#include <linux/clk.h>
>
> #include <defs.h>
> #include "debug.h"
> @@ -65,17 +66,21 @@ static int brcmf_of_get_country_codes(struct device
> *dev,
> return 0;
> }
>
> -void brcmf_of_probe(struct device *dev, enum brcmf_bus_type bus_type,
> - struct brcmf_mp_device *settings)
> +int brcmf_of_probe(struct device *dev, enum brcmf_bus_type bus_type,
> + struct brcmf_mp_device *settings)
> {
> struct brcmfmac_sdio_pd *sdio = &settings->bus.sdio;
> struct device_node *root, *np = dev->of_node;
> + struct clk *clk;
> const char *prop;
Small nit, please check if reverse x-mas tree order need to be follow here.
> int irq;
> int err;
> u32 irqf;
> u32 val;
>
> + if (!np || !of_device_is_compatible(np, "brcm,bcm4329-fmac"))
> + return 0;
> +
> /* Apple ARM64 platforms have their own idea of board type, passed
> in
> * via the device tree. They also have an antenna SKU parameter
> */
> @@ -105,7 +110,7 @@ void brcmf_of_probe(struct device *dev, enum
> brcmf_bus_type bus_type,
> board_type = devm_kstrdup(dev, tmp, GFP_KERNEL);
> if (!board_type) {
> of_node_put(root);
> - return;
> + return 0;
> }
> strreplace(board_type, '/', '-');
> settings->board_type = board_type;
> @@ -113,33 +118,39 @@ void brcmf_of_probe(struct device *dev, enum
> brcmf_bus_type bus_type,
> of_node_put(root);
> }
>
> - if (!np || !of_device_is_compatible(np, "brcm,bcm4329-fmac"))
> - return;
> -
> err = brcmf_of_get_country_codes(dev, settings);
> if (err)
> brcmf_err("failed to get OF country code map (err=%d)\n",
> err);
>
> of_get_mac_address(np, settings->mac);
>
> - if (bus_type != BRCMF_BUSTYPE_SDIO)
> - return;
> + if (bus_type == BRCMF_BUSTYPE_SDIO) {
> + if (of_property_read_u32(np, "brcm,drive-strength", &val) ==
> 0)
> + sdio->drive_strength = val;
>
> - if (of_property_read_u32(np, "brcm,drive-strength", &val) == 0)
> - sdio->drive_strength = val;
> + /* make sure there are interrupts defined in the node */
> + if (!of_property_present(np, "interrupts"))
> + return 0;
>
> - /* make sure there are interrupts defined in the node */
> - if (!of_property_present(np, "interrupts"))
> - return;
> + irq = irq_of_parse_and_map(np, 0);
> + if (!irq) {
> + brcmf_err("interrupt could not be mapped\n");
> + return 0;
> + }
> + irqf = irqd_get_trigger_type(irq_get_irq_data(irq));
> +
> + sdio->oob_irq_supported = true;
> + sdio->oob_irq_nr = irq;
> + sdio->oob_irq_flags = irqf;
> + }
>
> - irq = irq_of_parse_and_map(np, 0);
> - if (!irq) {
> - brcmf_err("interrupt could not be mapped\n");
> - return;
> + clk = devm_clk_get_optional_enabled(dev, "lpo");
> + if (!IS_ERR_OR_NULL(clk)) {
> + brcmf_dbg(INFO, "enabling 32kHz clock\n");
> + return clk_set_rate(clk, 32768);
> + } else {
> + return PTR_ERR_OR_ZERO(clk);
> }
> - irqf = irqd_get_trigger_type(irq_get_irq_data(irq));
>
> - sdio->oob_irq_supported = true;
> - sdio->oob_irq_nr = irq;
> - sdio->oob_irq_flags = irqf;
> + return 0;
....
....
> /* Detach and free everything */
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
> b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
> index 9a105e6debe1f..f7db46ae44906 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
> @@ -1272,6 +1272,9 @@ static int brcmf_usb_probe_cb(struct
> brcmf_usbdev_info *devinfo,
> ret = -ENOMEM;
> goto fail;
> }
> + ret = PTR_ERR_OR_ZERO(devinfo->settings);
> + if (ret < 0)
> + goto fail;
>
> if (!brcmf_usb_dlneeded(devinfo)) {
> ret = brcmf_alloc(devinfo->dev, devinfo->settings);
> --
> 2.34.1
>
Reviewed-by: Sai Krishna <saikrishnag@xxxxxxxxxxx>
