[PATCH v4 4/5] wifi: brcmfmac: Add optional lpo clock enable support
From: Jacobe Zang <hidden>
Date: 2024-07-29 07:01:47
Also in:
linux-devicetree, linux-rockchip, linux-wireless, lkml, netdev
Subsystem:
broadcom brcm80211 ieee802.11 wireless drivers, the rest · Maintainers:
Arend van Spriel, Linus Torvalds
WiFi modules often require 32kHz clock to function. Add support to enable the clock to PCIe driver. Co-developed-by: Ondrej Jirman <megi@xff.cz> Signed-off-by: Ondrej Jirman <megi@xff.cz> Signed-off-by: Jacobe Zang <redacted> --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c
index e406e11481a62..4db188a41fd52 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"
@@ -70,6 +71,7 @@ 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; + struct clk *clk; const char *prop; int irq; int err;
@@ -113,6 +115,13 @@ void brcmf_of_probe(struct device *dev, enum brcmf_bus_type bus_type, of_node_put(root); } + clk = devm_clk_get_optional_enabled(dev, "lpo"); + if (IS_ERR(clk)) + if (clk) { + brcmf_dbg(INFO, "enabling 32kHz clock\n"); + clk_set_rate(clk, 32768); + } + if (!np || !of_device_is_compatible(np, "brcm,bcm4329-fmac")) return;
--
2.34.1