Re: [PATCH v10 4/5] wifi: brcmfmac: Add optional lpo clock enable support
From: Arend van Spriel <arend.vanspriel@broadcom.com>
Date: 2024-08-13 11:57:38
Also in:
linux-arm-kernel, linux-devicetree, linux-rockchip, linux-wireless, lkml
On 8/13/2024 10:20 AM, Jacobe Zang wrote:
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.
I was going to say it looks good to me, but....
Co-developed-by: Ondrej Jirman <megi@xff.cz> Signed-off-by: Ondrej Jirman <megi@xff.cz> Co-developed-by: Arend van Spriel <arend.vanspriel@broadcom.com> Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com> Reviewed-by: Sai Krishna <redacted> Signed-off-by: Jacobe Zang <redacted> --- .../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 | 22 +++++--- .../broadcom/brcm80211/brcmfmac/usb.c | 3 ++ 7 files changed, 61 insertions(+), 36 deletions(-)
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quoted hunk ↗ jump to hunk
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
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quoted hunk ↗ jump to hunk
@@ -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) {
Don't like the fact that this now has an extra indentation level and it offers no extra benefit. Just keep the original if-statement and return 0. Consequently the LPO clock code should move just before the if-statement.
+ 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);
}
Change this to:
> + clk = devm_clk_get_optional_enabled(dev, "lpo");
> + if (IS_ERR_OR_NULL(clk)) {
> + return PTR_ERR_OR_ZERO(clk);
> + }
> + brcmf_dbg(INFO, "enabling 32kHz clock\n");
> + clk_set_rate(clk, 32768);
As said above this should be moved before the if-statement:
> - if (bus_type != BRCMF_BUSTYPE_SDIO)
> - 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; + return 0; }
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