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
| ||
|
Date: Sun, 22 Nov 2015 13:03:04 +0100 From: Alban Bedel <albeu@...e.fr> To: linux-mips@...ux-mips.org Cc: Ralf Baechle <ralf@...ux-mips.org>, Weijie Gao <hackpascal@...il.com>, linux-kernel@...r.kernel.org, Alban Bedel <albeu@...e.fr> Subject: [PATCH 1/2] MIPS: ath79: Fix the ar724x clock calculation From: Weijie Gao <hackpascal@...il.com> According to the AR7242 datasheet section 2.8, AR724X CPUs use a 40MHz input clock as the REF_CLK instead of 5MHz. The correct CPU PLL calculation procedure is as follows: CPU_PLL = (FB * REF_CLK) / REF_DIV / 2. This patch is compatible with the current calculation procedure with default FB and REF_DIV values. Tested on AR7240, AR7241 and AR7242. Signed-off-by: Weijie Gao <hackpascal@...il.com> Signed-off-by: Alban Bedel <albeu@...e.fr> [albeu@...e.fr: Fixed the commit log message] --- arch/mips/ath79/clock.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/mips/ath79/clock.c b/arch/mips/ath79/clock.c index eb5117c..ed28465 100644 --- a/arch/mips/ath79/clock.c +++ b/arch/mips/ath79/clock.c @@ -26,7 +26,7 @@ #include "common.h" #define AR71XX_BASE_FREQ 40000000 -#define AR724X_BASE_FREQ 5000000 +#define AR724X_BASE_FREQ 40000000 #define AR913X_BASE_FREQ 5000000 static struct clk *clks[3]; @@ -103,8 +103,8 @@ static void __init ar724x_clocks_init(void) div = ((pll >> AR724X_PLL_FB_SHIFT) & AR724X_PLL_FB_MASK); freq = div * ref_rate; - div = ((pll >> AR724X_PLL_REF_DIV_SHIFT) & AR724X_PLL_REF_DIV_MASK); - freq *= div; + div = ((pll >> AR724X_PLL_REF_DIV_SHIFT) & AR724X_PLL_REF_DIV_MASK) * 2; + freq /= div; cpu_rate = freq; -- 2.0.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists