linux-kernel - Re: [PATCH 1/2] mfd: rtsx: add func to split u32 into register

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Date:	Mon, 1 Dec 2014 12:16:54 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	micky_ching@...lsil.com.cn
Cc:	sameo@...ux.intel.com, chris@...ntf.net, ulf.hansson@...aro.org,
	devel@...uxdriverproject.org, linux-kernel@...r.kernel.org,
	linux-mmc@...r.kernel.org, gregkh@...uxfoundation.org,
	dan.carpenter@...cle.com, rogerable@...ltek.com,
	wei_wang@...lsil.com.cn
Subject: Re: [PATCH 1/2] mfd: rtsx: add func to split u32 into register

On Thu, 27 Nov 2014, micky_ching@...lsil.com.cn wrote:

> From: Micky Ching <micky_ching@...lsil.com.cn>
> 
> Add helper function to write u32 to registers, if we want to put u32
> value to 4 continuous register, this can help us reduce tedious work.
> 
> Signed-off-by: Micky Ching <micky_ching@...lsil.com.cn>
> ---
>  include/linux/mfd/rtsx_pci.h | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)

Okay, I'm happy that Dan is now satisfied.

Can I take this patch, or does patch 2 depend on it?

> diff --git a/include/linux/mfd/rtsx_pci.h b/include/linux/mfd/rtsx_pci.h
> index 74346d5..bf45ea2 100644
> --- a/include/linux/mfd/rtsx_pci.h
> +++ b/include/linux/mfd/rtsx_pci.h
> @@ -967,4 +967,19 @@ static inline u8 *rtsx_pci_get_cmd_data(struct rtsx_pcr *pcr)
>  	return (u8 *)(pcr->host_cmds_ptr);
>  }
>  
> +static inline void rtsx_pci_write_be32(struct rtsx_pcr *pcr, u16 reg, u32 val)
> +{
> +	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, reg,     0xFF, val >> 24);
> +	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, reg + 1, 0xFF, val >> 16);
> +	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, reg + 2, 0xFF, val >> 8);
> +	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, reg + 3, 0xFF, val);
> +}
> +
> +static inline void rtsx_pci_write_le32(struct rtsx_pcr *pcr, u16 reg, u32 val)
> +{
> +	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, reg,     0xFF, val);
> +	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, reg + 1, 0xFF, val >> 8);
> +	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, reg + 2, 0xFF, val >> 16);
> +	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, reg + 3, 0xFF, val >> 24);
> +}
>  #endif

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