From: Linux.HWI@garmin.com (J.D. Schroeder)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 2/3] ARM: DRA7x: dts: Update the OSC_32K_CLK frequency
Date: Mon, 2 May 2016 12:12:02 -0500 [thread overview]
Message-ID: <1462209123-7332-3-git-send-email-Linux.HWI@garmin.com> (raw)
In-Reply-To: <1462209123-7332-1-git-send-email-Linux.HWI@garmin.com>
From: "J.D. Schroeder" <jay.schroeder@garmin.com>
This commit updates the OSC_32K_CLK (secure_32k_clk_src_ck) frequency
from the precise 32kHz frequency (i.e., 32.768 kHz) to a more
accurate frequency of ~34.6 kHz. Actual measured frequencies of the
clock vary from processor to processor anywhere from 34.4 kHz up to
34.8 kHz. Note that the ~34 kHz frequency clock is generated
internally by the processor, not an input to the processor. This
change makes it more clear that the consumer of the
secure_32k_clk_src_ck will not get a precise 32.768 kHz frequency
output.
Signed-off-by: J.D. Schroeder <jay.schroeder@garmin.com>
Reviewed-by: Trenton Andres <trenton.andres@garmin.com>
---
arch/arm/boot/dts/dra7xx-clocks.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/dra7xx-clocks.dtsi b/arch/arm/boot/dts/dra7xx-clocks.dtsi
index 3f0c61d..f7ec976 100644
--- a/arch/arm/boot/dts/dra7xx-clocks.dtsi
+++ b/arch/arm/boot/dts/dra7xx-clocks.dtsi
@@ -95,7 +95,7 @@
secure_32k_clk_src_ck: secure_32k_clk_src_ck {
#clock-cells = <0>;
compatible = "fixed-clock";
- clock-frequency = <32768>;
+ clock-frequency = <34600>; /* approximate frequency */
};
sys_clk32_crystal_ck: sys_clk32_crystal_ck {
--
1.9.1
next prev parent reply other threads:[~2016-05-02 17:12 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-26 17:54 [PATCH 0/3] AM57/DRA7 Clock Tree DTSI Fix-ups J.D. Schroeder
2016-04-26 17:54 ` [PATCH 1/3] DRA7: Fix clock data for gmac_gmii_ref_clk_div J.D. Schroeder
2016-04-27 11:21 ` Tero Kristo
2016-04-27 16:36 ` Tony Lindgren
2016-04-27 17:16 ` Tony Lindgren
2016-05-02 17:12 ` [PATCH v2 0/3] AM57/DRA7 Clock Tree DTSI Fix-ups J.D. Schroeder
2016-05-02 17:12 ` [PATCH v2 1/3] DRA7: Fix clock data for gmac_gmii_ref_clk_div J.D. Schroeder
2016-05-02 17:12 ` J.D. Schroeder [this message]
2016-05-03 8:16 ` [PATCH v2 2/3] ARM: DRA7x: dts: Update the OSC_32K_CLK frequency Tero Kristo
2016-05-03 13:31 ` J.D. Schroeder
2016-05-03 16:43 ` Tony Lindgren
2016-05-03 17:32 ` Tero Kristo
2016-05-03 17:49 ` J.D. Schroeder
2016-05-03 18:08 ` Tony Lindgren
2016-05-03 18:08 ` Tero Kristo
2016-05-03 23:17 ` Nishanth Menon
2016-05-04 14:09 ` Matthijs van Duin
2016-05-02 17:12 ` [PATCH v2 3/3] ARM: dts: dra7: fix clock node definition to avoid build warning J.D. Schroeder
2016-05-03 4:20 ` [PATCH v2 0/3] AM57/DRA7 Clock Tree DTSI Fix-ups Lokesh Vutla
2016-04-26 17:54 ` [PATCH 2/3] ARM: DRA7x: dts: Fix the 32kHz clock calculation J.D. Schroeder
2016-04-27 11:40 ` Tero Kristo
2016-04-27 14:06 ` J.D. Schroeder
2016-04-27 19:47 ` Tero Kristo
2016-04-27 20:13 ` J.D. Schroeder
2016-04-26 17:54 ` [PATCH 3/3] ARM: DRA7x: dts: Update the OSC_32K_CLK frequency J.D. Schroeder
2016-04-27 11:49 ` Tero Kristo
2016-04-27 14:20 ` J.D. Schroeder
2016-04-26 18:13 ` [PATCH 0/3] AM57/DRA7 Clock Tree DTSI Fix-ups Tony Lindgren
2016-04-26 19:18 ` J.D. Schroeder
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