linux-kernel - [PATCH v2 5/7] ARM: imx6q: convert to use syscon to access anatop registers

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Message-ID: <1346052285-4344-6-git-send-email-b29396@freescale.com>
Date:	Mon, 27 Aug 2012 15:24:43 +0800
From:	Dong Aisheng <b29396@...escale.com>
To:	<linux-kernel@...r.kernel.org>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<linus.walleij@...ricsson.com>, <s.hauer@...gutronix.de>,
	<shawn.guo@...aro.org>, <kernel@...gutronix.de>,
	<grant.likely@...retlab.ca>, <rob.herring@...xeda.com>,
	<sameo@...ux.intel.com>, <lrg@...com>,
	<broonie@...nsource.wolfsonmicro.com>,
	<richard.zhao@...escale.com>,
	<devicetree-discuss@...ts.ozlabs.org>, <swarren@...dotorg.org>
Subject: [PATCH v2 5/7] ARM: imx6q: convert to use syscon to access anatop registers

From: Dong Aisheng <dong.aisheng@...aro.org>

Using syscon to access anatop registers.

Signed-off-by: Dong Aisheng <dong.aisheng@...aro.org>
---
ChangeLog v1->v2:
 * update to use generic regmap api
---
 arch/arm/mach-imx/Kconfig      |    2 +-
 arch/arm/mach-imx/mach-imx6q.c |   43 ++++++++++++++++-----------------------
 2 files changed, 19 insertions(+), 26 deletions(-)

diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index afd542a..7bba253 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -839,7 +839,7 @@ config SOC_IMX6Q
 	select HAVE_IMX_MMDC
 	select HAVE_IMX_SRC
 	select HAVE_SMP
-	select MFD_ANATOP
+	select MFD_SYSCON
 	select PINCTRL
 	select PINCTRL_IMX6Q
 
diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
index 045b3f6..5de869a 100644
--- a/arch/arm/mach-imx/mach-imx6q.c
+++ b/arch/arm/mach-imx/mach-imx6q.c
@@ -24,8 +24,9 @@
 #include <linux/of_platform.h>
 #include <linux/pinctrl/machine.h>
 #include <linux/phy.h>
+#include <linux/regmap.h>
 #include <linux/micrel_phy.h>
-#include <linux/mfd/anatop.h>
+#include <linux/mfd/syscon.h>
 #include <asm/cpuidle.h>
 #include <asm/smp_twd.h>
 #include <asm/hardware/cache-l2x0.h>
@@ -121,38 +122,30 @@ static void __init imx6q_sabrelite_init(void)
 static void __init imx6q_usb_init(void)
 {
 	struct device_node *np;
-	struct platform_device *pdev = NULL;
-	struct anatop *adata = NULL;
+	struct regmap *anatop;
 
 	np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-anatop");
-	if (np)
-		pdev = of_find_device_by_node(np);
-	if (pdev)
-		adata = platform_get_drvdata(pdev);
-	if (!adata) {
-		if (np)
-			of_node_put(np);
-		return;
-	}
-
 #define HW_ANADIG_USB1_CHRG_DETECT		0x000001b0
 #define HW_ANADIG_USB2_CHRG_DETECT		0x00000210
 
 #define BM_ANADIG_USB_CHRG_DETECT_EN_B		0x00100000
 #define BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B	0x00080000
 
-	/*
-	 * The external charger detector needs to be disabled,
-	 * or the signal at DP will be poor
-	 */
-	anatop_write_reg(adata, HW_ANADIG_USB1_CHRG_DETECT,
-			BM_ANADIG_USB_CHRG_DETECT_EN_B
-			| BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B,
-			~0);
-	anatop_write_reg(adata, HW_ANADIG_USB2_CHRG_DETECT,
-			BM_ANADIG_USB_CHRG_DETECT_EN_B |
-			BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B,
-			~0);
+	anatop = syscon_regmap_lookup_by_compatible("fsl,imx6q-anatop");
+	if (!IS_ERR(anatop)) {
+		/*
+		 * The external charger detector needs to be disabled,
+		 * or the signal at DP will be poor
+		 */
+		regmap_write(anatop, HW_ANADIG_USB1_CHRG_DETECT,
+				BM_ANADIG_USB_CHRG_DETECT_EN_B
+				| BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B);
+		regmap_write(anatop, HW_ANADIG_USB2_CHRG_DETECT,
+				BM_ANADIG_USB_CHRG_DETECT_EN_B |
+				BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B);
+	} else {
+		pr_warn("failed to find fsl,imx6q-anatop regmap\n");
+	}
 
 	of_node_put(np);
 }
-- 
1.7.0.4


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