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

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Message-ID: <51dde5250305623c420e78fa555800ef8fef0a09.1417056337.git.micky_ching@realsil.com.cn>
Date:	Thu, 27 Nov 2014 10:53:58 +0800
From:	<micky_ching@...lsil.com.cn>
To:	<sameo@...ux.intel.com>, <lee.jones@...aro.org>,
	<chris@...ntf.net>, <ulf.hansson@...aro.org>
CC:	<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>, Micky Ching <micky_ching@...lsil.com.cn>
Subject: [PATCH 1/2] mfd: rtsx: add func to split u32 into register

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(+)

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
-- 
1.9.1

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