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Message-Id: <20240802025715.2360456-5-jacobe.zang@wesion.com>
Date: Fri, 2 Aug 2024 10:57:14 +0800
From: Jacobe Zang <jacobe.zang@...ion.com>
To: robh@...nel.org,
krzk+dt@...nel.org,
heiko@...ech.de,
kvalo@...nel.org,
davem@...emloft.net,
edumazet@...gle.com,
kuba@...nel.org,
pabeni@...hat.com,
conor+dt@...nel.org,
arend.vanspriel@...adcom.com
Cc: efectn@...tonmail.com,
dsimic@...jaro.org,
jagan@...eble.ai,
devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-rockchip@...ts.infradead.org,
linux-kernel@...r.kernel.org,
arend@...adcom.com,
linux-wireless@...r.kernel.org,
netdev@...r.kernel.org,
megi@....cz,
duoming@....edu.cn,
bhelgaas@...gle.com,
minipli@...ecurity.net,
brcm80211@...ts.linux.dev,
brcm80211-dev-list.pdl@...adcom.com,
nick@...das.com,
Jacobe Zang <jacobe.zang@...ion.com>
Subject: [PATCH v7 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 values.
Co-developed-by: Ondrej Jirman <megi@....cz>
Signed-off-by: Ondrej Jirman <megi@....cz>
Signed-off-by: Jacobe Zang <jacobe.zang@...ion.com>
Change-Id: I21bf9e21b275452369dce1f50c2f092eded6376c
---
.../wireless/broadcom/brcm80211/brcmfmac/of.c | 49 +++++++++++--------
.../wireless/broadcom/brcm80211/brcmfmac/of.h | 4 +-
2 files changed, 31 insertions(+), 22 deletions(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c
index e406e11481a62..75773f65a9076 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,
+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 PTR_ERR_OR_ZERO(np);
+
/* 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 PTR_ERR_OR_ZERO(board_type);
}
strreplace(board_type, '/', '-');
settings->board_type = board_type;
@@ -113,33 +118,37 @@ 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 PTR_ERR_OR_ZERO(np);
- /* 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 -EINVAL;
+ }
+ irqf = irqd_get_trigger_type(irq_get_irq_data(irq));
- irq = irq_of_parse_and_map(np, 0);
- if (!irq) {
- brcmf_err("interrupt could not be mapped\n");
- return;
+ sdio->oob_irq_supported = true;
+ sdio->oob_irq_nr = irq;
+ sdio->oob_irq_flags = irqf;
}
- 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;
+ 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);
+ }
}
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.h
index 10bf52253337e..8111286fc4b0c 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.h
@@ -3,10 +3,10 @@
* Copyright (c) 2014 Broadcom Corporation
*/
#ifdef CONFIG_OF
-void brcmf_of_probe(struct device *dev, enum brcmf_bus_type bus_type,
+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,
+static int brcmf_of_probe(struct device *dev, enum brcmf_bus_type bus_type,
struct brcmf_mp_device *settings)
{
}
--
2.34.1
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