WiFi modules often require 32kHz clock to function. Add support to
enable the clock to PCIe driver.
Co-developed-by: Ondrej Jirman <megi@xxxxxx>
Signed-off-by: Ondrej Jirman <megi@xxxxxx>
Signed-off-by: Jacobe Zang <jacobe.zang@xxxxxxxxxx>
---
.../net/wireless/broadcom/brcm80211/brcmfmac/pcie.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
index 06698a714b523..e84f562fc91b8 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
@@ -3,6 +3,7 @@
* Copyright (c) 2014 Broadcom Corporation
*/
+#include <linux/clk.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/firmware.h>
@@ -2411,6 +2412,7 @@ brcmf_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
struct brcmf_pciedev *pcie_bus_dev;
struct brcmf_core *core;
struct brcmf_bus *bus;
+ struct clk *clk;
if (!id) {
id = pci_match_id(brcmf_pcie_devid_table, pdev);
@@ -2422,6 +2424,14 @@ brcmf_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
brcmf_dbg(PCIE, "Enter %x:%x\n", pdev->vendor, pdev->device);
+ clk = devm_clk_get_optional_enabled(&pdev->dev, "lpo");
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+ if (clk) {
+ brcmf_dbg(PCIE, "enabling 32kHz clock\n", pdev->vendor, pdev->device);
+ clk_set_rate(clk, 32768);
+ }
+
ret = -ENOMEM;
devinfo = kzalloc(sizeof(*devinfo), GFP_KERNEL);
if (devinfo == NULL)
--
2.34.1
