linux-kernel - Re: [PATCH v2 4/9] ARM: STi: DT: STiH407: Add Device Tree node for the LPC

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Date:	Fri, 23 Jan 2015 09:43:54 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	David Paris <david.paris@...com>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	kernel@...inux.com, rtc-linux@...glegroups.com, wim@...ana.be,
	linux-watchdog@...r.kernel.org, devicetree@...r.kernel.org,
	linux@...ck-us.net
Subject: Re: [PATCH v2 4/9] ARM: STi: DT: STiH407: Add Device Tree node for
 the LPC

On Fri, 23 Jan 2015, David Paris wrote:

> Hi Lee,
> 
>     Just a minor remark/question,
> 
>     David
> 
> On 01/22/2015 12:56 PM, Lee Jones wrote:
> >On current ST platforms the LPC controls a number of functions.  This
> >patch enables support for the LPC Watchdog and LPC RTC devices on LPC1
> >and LPC2 respectively.
> >
> >Signed-off-by: David Paris <david.paris@...com>
> >Signed-off-by: Lee Jones <lee.jones@...aro.org>
> >---
> >  arch/arm/boot/dts/stih407-family.dtsi | 20 ++++++++++++++++++++
> >  1 file changed, 20 insertions(+)
> >
> >diff --git a/arch/arm/boot/dts/stih407-family.dtsi b/arch/arm/boot/dts/stih407-family.dtsi
> >index 3e31d32..04448a7 100644
> >--- a/arch/arm/boot/dts/stih407-family.dtsi
> >+++ b/arch/arm/boot/dts/stih407-family.dtsi
> >@@ -7,6 +7,7 @@
> >   * publishhed by the Free Software Foundation.
> >   */
> >  #include "stih407-pinctrl.dtsi"
> >+#include <dt-bindings/mfd/st-lpc.h>
> >  #include <dt-bindings/reset-controller/stih407-resets.h>
> >  / {
> >  	#address-cells = <1>;
> >@@ -274,5 +275,24 @@
> >  			status = "disabled";
> >  		};
> >+
> >+		/* Watchdog and Real-Time Clock */
> >+		lpc@...7000 {
> >+			compatible = "st,stih407-lpc";
> >+			reg = <0x8787000 0x1000>;
> >+			interrupts = <GIC_SPI 129 IRQ_TYPE_EDGE_RISING>;
> In case of Watchdog, "interrupt" property is not used. So I think we
> can remove it ?

Sure thing.

> >+			clocks = <&clk_s_d3_flexgen CLK_LPC_0>;
> >+			timeout-sec = <120>;
> >+			st,syscfg = <&syscfg_core>;
> >+			st,lpc-mode = <ST_LPC_MODE_WDT>;
> >+		};
> >+
> >+		lpc@...8000 {
> >+			compatible = "st,stih407-lpc";
> >+			reg = <0x8788000 0x1000>;
> >+			interrupts = <GIC_SPI 130 IRQ_TYPE_EDGE_RISING>;
> >+			clocks = <&clk_s_d3_flexgen CLK_LPC_1>;
> >+			st,lpc-mode = <ST_LPC_MODE_RTC>;
> >+		};
> >  	};
> >  };
> 

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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