linux-kernel - Re: [PATCH v1 04/16] mfd: mt6397: add MT6323 RTC support into MT6397 driver

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Date:   Wed, 28 Mar 2018 12:15:37 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     sean.wang@...iatek.com
Cc:     robh+dt@...nel.org, mark.rutland@....com, sre@...nel.org,
        a.zummo@...ertech.it, alexandre.belloni@...e-electrons.com,
        eddie.huang@...iatek.com, devicetree@...r.kernel.org,
        linux-rtc@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 04/16] mfd: mt6397: add MT6323 RTC support into MT6397
 driver

On Fri, 23 Mar 2018, sean.wang@...iatek.com wrote:

> From: Sean Wang <sean.wang@...iatek.com>
> 
> Add compatible string as "mt6323-rtc" that will make the OF core spawn
> child devices for the RTC subnode of that MT6323 MFD node.
> 
> Signed-off-by: Sean Wang <sean.wang@...iatek.com>
> ---
>  drivers/mfd/mt6397-core.c | 23 ++++++++++++++++++++++-
>  1 file changed, 22 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mfd/mt6397-core.c b/drivers/mfd/mt6397-core.c
> index 77b64bd..f71874a 100644
> --- a/drivers/mfd/mt6397-core.c
> +++ b/drivers/mfd/mt6397-core.c
> @@ -1,5 +1,5 @@
>  /*
> - * Copyright (c) 2014 MediaTek Inc.
> + * Copyright (c) 2014-2018 MediaTek Inc.
>   * Author: Flora Fu, MediaTek
>   *
>   * This program is free software; you can redistribute it and/or modify
> @@ -23,6 +23,9 @@
>  #include <linux/mfd/mt6397/registers.h>
>  #include <linux/mfd/mt6323/registers.h>
>  
> +#define MT6323_RTC_BASE		0x8000
> +#define MT6323_RTC_SIZE		0x3e
> +
>  #define MT6397_RTC_BASE		0xe000
>  #define MT6397_RTC_SIZE		0x3e
>  
> @@ -30,6 +33,19 @@
>  #define MT6391_CID_CODE		0x91
>  #define MT6397_CID_CODE		0x97
>  
> +static const struct resource mt6323_rtc_resources[] = {
> +	{
> +		.start = MT6323_RTC_BASE,
> +		.end   = MT6323_RTC_BASE + MT6323_RTC_SIZE,
> +		.flags = IORESOURCE_MEM,
> +	},
> +	{
> +		.start = MT6323_IRQ_STATUS_RTC,
> +		.end   = MT6323_IRQ_STATUS_RTC,
> +		.flags = IORESOURCE_IRQ,
> +	},
> +};

Please use the DEFINE_RES_* helpers instead.

Defined in: include/linux/ioport.h

>  static const struct resource mt6397_rtc_resources[] = {
>  	{
>  		.start = MT6397_RTC_BASE,
> @@ -55,6 +71,11 @@ static const struct resource mt6397_keys_resources[] = {
>  
>  static const struct mfd_cell mt6323_devs[] = {
>  	{
> +		.name = "mt6323-rtc",
> +		.num_resources = ARRAY_SIZE(mt6323_rtc_resources),
> +		.resources = mt6323_rtc_resources,
> +		.of_compatible = "mediatek,mt6323-rtc",
> +	}, {
>  		.name = "mt6323-regulator",
>  		.of_compatible = "mediatek,mt6323-regulator"
>  	}, {

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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