summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-imx
diff options
context:
space:
mode:
authorRichard Zhao <richard.zhao@freescale.com>2012-07-12 04:25:24 +0200
committerShawn Guo <shawn.guo@linaro.org>2012-07-12 07:45:00 +0200
commit396bf1c24e13f45686118acd550dd63b23035b23 (patch)
tree12710a21887965fa3e71979867b2a514ac7791cc /arch/arm/mach-imx
parentARM: imx6q: add usbphy clocks (diff)
downloadlinux-396bf1c24e13f45686118acd550dd63b23035b23.tar.xz
linux-396bf1c24e13f45686118acd550dd63b23035b23.zip
ARM: imx6q: disable usb charger detector
The external charger detector needs to be disabled, or the signal at DP will be poor Signed-off-by: Richard Zhao <richard.zhao@freescale.com> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Diffstat (limited to 'arch/arm/mach-imx')
-rw-r--r--arch/arm/mach-imx/mach-imx6q.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
index b47e98b7d539..140f55010630 100644
--- a/arch/arm/mach-imx/mach-imx6q.c
+++ b/arch/arm/mach-imx/mach-imx6q.c
@@ -24,6 +24,7 @@
#include <linux/pinctrl/machine.h>
#include <linux/phy.h>
#include <linux/micrel_phy.h>
+#include <linux/mfd/anatop.h>
#include <asm/smp_twd.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/hardware/gic.h>
@@ -113,6 +114,45 @@ static void __init imx6q_sabrelite_init(void)
imx6q_sabrelite_cko1_setup();
}
+static void __init imx6q_usb_init(void)
+{
+ struct device_node *np;
+ struct platform_device *pdev = NULL;
+ struct anatop *adata = NULL;
+
+ 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);
+
+ of_node_put(np);
+}
+
static void __init imx6q_init_machine(void)
{
/*
@@ -127,6 +167,7 @@ static void __init imx6q_init_machine(void)
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
imx6q_pm_init();
+ imx6q_usb_init();
}
static void __init imx6q_map_io(void)