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From: "Manjunathappa, Prakash" <prakash.pm-l0cyMroinI0@public.gmane.org>
To: davinci-linux-open-source-VycZQUHpC/PFrsHnngEfi1aTQe2KTcn/@public.gmane.org,
	linux-serial-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org,
	devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org,
	rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org,
	grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org,
	hs-ynQEQJNshbs@public.gmane.org,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: [PATCH v3 3/5] ARM: davinci: da850: do not specify clock_frequency for UART DT node
Date: Wed, 19 Jun 2013 14:45:40 +0530	[thread overview]
Message-ID: <1371633342-1210-4-git-send-email-prakash.pm@ti.com> (raw)
In-Reply-To: <1371633342-1210-1-git-send-email-prakash.pm-l0cyMroinI0@public.gmane.org>

DT kernel on da850-evm comes up with garbled UART logs. This is because
of mismatch in actual module clock rate and rate specified(clock-frequency)
in DT blob. kernel should not assume or depend on bootloaders clock
configuration, instead let it find the clock rate at runtime.

Issue discussed here before arriving on this implementation:
"ARM: davinci: da850 evm: update clock rate for UART 1/2 DT nodes"
https://patchwork.kernel.org/patch/2162271/

Signed-off-by: Manjunathappa, Prakash <prakash.pm-l0cyMroinI0@public.gmane.org>
---
 arch/arm/boot/dts/da850.dtsi |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)

diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
index 2c88313..4d43046 100644
--- a/arch/arm/boot/dts/da850.dtsi
+++ b/arch/arm/boot/dts/da850.dtsi
@@ -129,7 +129,6 @@
 		serial0: serial@1c42000 {
 			compatible = "ns16550a";
 			reg = <0x42000 0x100>;
-			clock-frequency = <150000000>;
 			reg-shift = <2>;
 			interrupts = <25>;
 			status = "disabled";
@@ -137,7 +136,6 @@
 		serial1: serial@1d0c000 {
 			compatible = "ns16550a";
 			reg = <0x10c000 0x100>;
-			clock-frequency = <150000000>;
 			reg-shift = <2>;
 			interrupts = <53>;
 			status = "disabled";
@@ -145,7 +143,6 @@
 		serial2: serial@1d0d000 {
 			compatible = "ns16550a";
 			reg = <0x10d000 0x100>;
-			clock-frequency = <150000000>;
 			reg-shift = <2>;
 			interrupts = <61>;
 			status = "disabled";
-- 
1.7.4.1

  parent reply	other threads:[~2013-06-19  9:15 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-06-19  9:15 [PATCH v3 0/5] ARM: davinci: fix UART clock enabling Manjunathappa, Prakash
     [not found] ` <1371633342-1210-1-git-send-email-prakash.pm-l0cyMroinI0@public.gmane.org>
2013-06-19  9:15   ` [PATCH v3 1/5] ARM: davinci: uart: move to devid based clk_get Manjunathappa, Prakash
     [not found]     ` <1371633342-1210-2-git-send-email-prakash.pm-l0cyMroinI0@public.gmane.org>
2013-07-19 13:06       ` Sekhar Nori
2013-06-19  9:15   ` [PATCH v3 2/5] ARM: davinci: da850: override device name of UART in DT kernel Manjunathappa, Prakash
     [not found]     ` <1371633342-1210-3-git-send-email-prakash.pm-l0cyMroinI0@public.gmane.org>
2013-07-19 14:50       ` Sekhar Nori
2013-06-19  9:15   ` Manjunathappa, Prakash [this message]
     [not found]     ` <1371633342-1210-4-git-send-email-prakash.pm-l0cyMroinI0@public.gmane.org>
2013-07-22 10:03       ` [PATCH v3 3/5] ARM: davinci: da850: do not specify clock_frequency for UART DT node Sekhar Nori
2013-06-19  9:15 ` [PATCH v3 4/5] ARM: davinci: da8xx: remove da8xx_uart_clk_enable Manjunathappa, Prakash
     [not found]   ` <1371633342-1210-5-git-send-email-prakash.pm-l0cyMroinI0@public.gmane.org>
2013-07-22 10:03     ` Sekhar Nori
2013-06-19  9:15 ` [PATCH v3 5/5] ARM: davinci: serial: platform code cleanup Manjunathappa, Prakash
     [not found]   ` <1371633342-1210-6-git-send-email-prakash.pm-l0cyMroinI0@public.gmane.org>
2013-07-22 10:11     ` Sekhar Nori
     [not found]       ` <51ED0534.2080408-l0cyMroinI0@public.gmane.org>
2013-08-14 11:27         ` Sekhar Nori

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