From 77b8537f739d818cb1c7c9ed1cf03a3cc8028c0b Mon Sep 17 00:00:00 2001
From: Ondrej Jirman <megi@xff.cz>
Date: Wed, 28 Feb 2024 21:09:51 +0100
Subject: [PATCH 066/463] net: wireless: brcmfmac: Add optional 32k clock
 enable support

WiFi modules often require 32kHz clock to function. Add support to
enable the clock to pcie driver.

Signed-off-by: Ondrej Jirman <megi@xff.cz>
---
 .../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 6071f031ad660..fae3fdf5ff632 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>
@@ -2408,6 +2409,7 @@ 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);
@@ -2419,6 +2421,14 @@ 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, "32k");
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+	if (clk) {
+		dev_info(&pdev->dev, "enabling 32kHz clock\n");
+		clk_set_rate(clk, 32768);
+	}
+
 	ret = -ENOMEM;
 	devinfo = kzalloc(sizeof(*devinfo), GFP_KERNEL);
 	if (devinfo == NULL)
-- 
2.46.0

