[PATCH v9 4/5] wifi: brcmfmac: Add optional lpo clock enable support
Jacobe Zang
jacobe.zang at wesion.com
Fri Aug 9 20:51:40 PDT 2024
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 at xff.cz>
Signed-off-by: Ondrej Jirman <megi at xff.cz>
Co-developed-by: Arend van Spriel <arend.vanspriel at broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel at broadcom.com>
Signed-off-by: Jacobe Zang <jacobe.zang at wesion.com>
---
.../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;
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;
}
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.h
index 10bf52253337e..ae124c73fc3b7 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.h
@@ -3,11 +3,12 @@
* Copyright (c) 2014 Broadcom Corporation
*/
#ifdef CONFIG_OF
-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);
#else
-static void brcmf_of_probe(struct device *dev, enum brcmf_bus_type bus_type,
- struct brcmf_mp_device *settings)
+static int brcmf_of_probe(struct device *dev, enum brcmf_bus_type bus_type,
+ struct brcmf_mp_device *settings)
{
+ return 0;
}
#endif /* CONFIG_OF */
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
index 06698a714b523..c34405a6d38b8 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
@@ -2457,6 +2457,9 @@ brcmf_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
ret = -ENOMEM;
goto fail;
}
+ ret = PTR_ERR_OR_ZERO(devinfo->settings);
+ if (ret < 0)
+ goto fail;
bus = kzalloc(sizeof(*bus), GFP_KERNEL);
if (!bus) {
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
index 6b38d9de71af6..461b7ff3be24b 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
@@ -3943,7 +3943,7 @@ static const struct brcmf_buscore_ops brcmf_sdio_buscore_ops = {
.write32 = brcmf_sdio_buscore_write32,
};
-static bool
+static int
brcmf_sdio_probe_attach(struct brcmf_sdio *bus)
{
struct brcmf_sdio_dev *sdiodev;
@@ -3953,6 +3953,7 @@ brcmf_sdio_probe_attach(struct brcmf_sdio *bus)
u32 reg_val;
u32 drivestrength;
u32 enum_base;
+ int ret = -EBADE;
sdiodev = bus->sdiodev;
sdio_claim_host(sdiodev->func1);
@@ -4001,8 +4002,9 @@ brcmf_sdio_probe_attach(struct brcmf_sdio *bus)
BRCMF_BUSTYPE_SDIO,
bus->ci->chip,
bus->ci->chiprev);
- if (!sdiodev->settings) {
+ if (IS_ERR_OR_NULL(sdiodev->settings)) {
brcmf_err("Failed to get device parameters\n");
+ ret = PTR_ERR_OR_ZERO(sdiodev->settings);
goto fail;
}
/* platform specific configuration:
@@ -4071,7 +4073,7 @@ brcmf_sdio_probe_attach(struct brcmf_sdio *bus)
/* allocate header buffer */
bus->hdrbuf = kzalloc(MAX_HDR_READ + bus->head_align, GFP_KERNEL);
if (!bus->hdrbuf)
- return false;
+ return -ENOMEM;
/* Locate an appropriately-aligned portion of hdrbuf */
bus->rxhdr = (u8 *) roundup((unsigned long)&bus->hdrbuf[0],
bus->head_align);
@@ -4082,11 +4084,11 @@ brcmf_sdio_probe_attach(struct brcmf_sdio *bus)
if (bus->poll)
bus->pollrate = 1;
- return true;
+ return 0;
fail:
sdio_release_host(sdiodev->func1);
- return false;
+ return ret;
}
static int
@@ -4446,13 +4448,16 @@ struct brcmf_sdio *brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
struct brcmf_sdio *bus;
struct workqueue_struct *wq;
struct brcmf_fw_request *fwreq;
+ int probe_attach_result;
brcmf_dbg(TRACE, "Enter\n");
/* Allocate private bus interface state */
bus = kzalloc(sizeof(struct brcmf_sdio), GFP_ATOMIC);
- if (!bus)
+ if (!bus) {
+ ret = -ENOMEM;
goto fail;
+ }
bus->sdiodev = sdiodev;
sdiodev->bus = bus;
@@ -4467,6 +4472,7 @@ struct brcmf_sdio *brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
dev_name(&sdiodev->func1->dev));
if (!wq) {
brcmf_err("insufficient memory to create txworkqueue\n");
+ ret = -ENOMEM;
goto fail;
}
brcmf_sdiod_freezer_count(sdiodev);
@@ -4474,8 +4480,10 @@ struct brcmf_sdio *brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
bus->brcmf_wq = wq;
/* attempt to attach to the dongle */
- if (!(brcmf_sdio_probe_attach(bus))) {
+ probe_attach_result = brcmf_sdio_probe_attach(bus);
+ if (probe_attach_result < 0) {
brcmf_err("brcmf_sdio_probe_attach failed\n");
+ ret = probe_attach_result;
goto fail;
}
@@ -4546,7 +4554,7 @@ struct brcmf_sdio *brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
fail:
brcmf_sdio_remove(bus);
- return NULL;
+ return ERR_PTR(ret);
}
/* 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
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