linux-kernel - [PATCH 4.14 179/210] wifi: rt2x00: set SoC wmac clock register

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20221024113002.777680514@linuxfoundation.org>
Date:   Mon, 24 Oct 2022 13:31:36 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Serge Vasilugin <vasilugin@...dex.ru>,
        Daniel Golle <daniel@...rotopia.org>,
        Stanislaw Gruszka <stf_xl@...pl>,
        Kalle Valo <kvalo@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.14 179/210] wifi: rt2x00: set SoC wmac clock register

From: Daniel Golle <daniel@...rotopia.org>

[ Upstream commit cbde6ed406a51092d9e8a2df058f5f8490f27443 ]

Instead of using the default value 33 (pci), set US_CYC_CNT init based
on Programming guide:
If available, set chipset bus clock with fallback to cpu clock/3.

Reported-by: Serge Vasilugin <vasilugin@...dex.ru>
Signed-off-by: Daniel Golle <daniel@...rotopia.org>
Acked-by: Stanislaw Gruszka <stf_xl@...pl>
Signed-off-by: Kalle Valo <kvalo@...nel.org>
Link: https://lore.kernel.org/r/3e275d259f476f597dab91a9c395015ef3fe3284.1663445157.git.daniel@makrotopia.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 .../net/wireless/ralink/rt2x00/rt2800lib.c    | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
index 0c90bf0540b9..57fa472b5c4e 100644
--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
@@ -5567,6 +5567,27 @@ static int rt2800_init_registers(struct rt2x00_dev *rt2x00dev)
 		reg = rt2800_register_read(rt2x00dev, US_CYC_CNT);
 		rt2x00_set_field32(&reg, US_CYC_CNT_CLOCK_CYCLE, 125);
 		rt2800_register_write(rt2x00dev, US_CYC_CNT, reg);
+	} else if (rt2x00_is_soc(rt2x00dev)) {
+		struct clk *clk = clk_get_sys("bus", NULL);
+		int rate;
+
+		if (IS_ERR(clk)) {
+			clk = clk_get_sys("cpu", NULL);
+
+			if (IS_ERR(clk)) {
+				rate = 125;
+			} else {
+				rate = clk_get_rate(clk) / 3000000;
+				clk_put(clk);
+			}
+		} else {
+			rate = clk_get_rate(clk) / 1000000;
+			clk_put(clk);
+		}
+
+		reg = rt2800_register_read(rt2x00dev, US_CYC_CNT);
+		rt2x00_set_field32(&reg, US_CYC_CNT_CLOCK_CYCLE, rate);
+		rt2800_register_write(rt2x00dev, US_CYC_CNT, reg);
 	}
 
 	reg = rt2800_register_read(rt2x00dev, HT_FBK_CFG0);
-- 
2.35.1