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Message-Id: <1273508519-23033-1-git-send-email-Dinh.Nguyen@freescale.com>
Date: Mon, 10 May 2010 11:21:57 -0500
From: Dinh Nguyen <Dinh.Nguyen@...escale.com>
To: linux-kernel@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org, linux-usb@...r.kernel.org,
s.hauer@...gutronix.de, valentin.longchamp@...l.ch,
daniel@...aq.de, grant.likely@...retlab.ca, bryan.wu@...onical.com,
amit.kucheria@...onical.com, Jun.Li@...escale.com,
xiao-lizhang@...escale.com, Dinh Nguyen <Dinh.Nguyen@...escale.com>
Subject: [PATCHv2 2.6.34-rc7 1/3] mxc: gadget: remove 60mhz clock requirement for freescale mx51 usb core
renamed fsl_mx3_udc.c -> fsl_mxc_udc.c
for mx51, usb core is clocked from sources that are not 60mhz.
This patch applies to 2.6.34-rc7.
Signed-off-by: Dinh Nguyen <Dinh.Nguyen@...escale.com>
---
drivers/usb/gadget/Makefile | 2 +-
drivers/usb/gadget/fsl_mx3_udc.c | 104 -------------------------------------
drivers/usb/gadget/fsl_mxc_udc.c | 106 ++++++++++++++++++++++++++++++++++++++
3 files changed, 107 insertions(+), 105 deletions(-)
delete mode 100644 drivers/usb/gadget/fsl_mx3_udc.c
create mode 100644 drivers/usb/gadget/fsl_mxc_udc.c
diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index 43b51da..c922eef 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -20,7 +20,7 @@ obj-$(CONFIG_USB_ATMEL_USBA) += atmel_usba_udc.o
obj-$(CONFIG_USB_FSL_USB2) += fsl_usb2_udc.o
fsl_usb2_udc-objs := fsl_udc_core.o
ifeq ($(CONFIG_ARCH_MXC),y)
-fsl_usb2_udc-objs += fsl_mx3_udc.o
+fsl_usb2_udc-objs += fsl_mxc_udc.o
endif
obj-$(CONFIG_USB_M66592) += m66592-udc.o
obj-$(CONFIG_USB_R8A66597) += r8a66597-udc.o
diff --git a/drivers/usb/gadget/fsl_mx3_udc.c b/drivers/usb/gadget/fsl_mx3_udc.c
deleted file mode 100644
index 20a802e..0000000
--- a/drivers/usb/gadget/fsl_mx3_udc.c
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
- * Copyright (C) 2009
- * Guennadi Liakhovetski, DENX Software Engineering, <lg@...x.de>
- *
- * Description:
- * Helper routines for i.MX3x SoCs from Freescale, needed by the fsl_usb2_udc.c
- * driver to function correctly on these systems.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/fsl_devices.h>
-#include <linux/platform_device.h>
-
-#include <mach/hardware.h>
-
-static struct clk *mxc_ahb_clk;
-static struct clk *mxc_usb_clk;
-
-int fsl_udc_clk_init(struct platform_device *pdev)
-{
- struct fsl_usb2_platform_data *pdata;
- unsigned long freq;
- int ret;
-
- pdata = pdev->dev.platform_data;
-
- if (!cpu_is_mx35()) {
- mxc_ahb_clk = clk_get(&pdev->dev, "usb_ahb");
- if (IS_ERR(mxc_ahb_clk))
- return PTR_ERR(mxc_ahb_clk);
-
- ret = clk_enable(mxc_ahb_clk);
- if (ret < 0) {
- dev_err(&pdev->dev, "clk_enable(\"usb_ahb\") failed\n");
- goto eenahb;
- }
- }
-
- /* make sure USB_CLK is running at 60 MHz +/- 1000 Hz */
- mxc_usb_clk = clk_get(&pdev->dev, "usb");
- if (IS_ERR(mxc_usb_clk)) {
- dev_err(&pdev->dev, "clk_get(\"usb\") failed\n");
- ret = PTR_ERR(mxc_usb_clk);
- goto egusb;
- }
-
- freq = clk_get_rate(mxc_usb_clk);
- if (pdata->phy_mode != FSL_USB2_PHY_ULPI &&
- (freq < 59999000 || freq > 60001000)) {
- dev_err(&pdev->dev, "USB_CLK=%lu, should be 60MHz\n", freq);
- ret = -EINVAL;
- goto eclkrate;
- }
-
- ret = clk_enable(mxc_usb_clk);
- if (ret < 0) {
- dev_err(&pdev->dev, "clk_enable(\"usb_clk\") failed\n");
- goto eenusb;
- }
-
- return 0;
-
-eenusb:
-eclkrate:
- clk_put(mxc_usb_clk);
- mxc_usb_clk = NULL;
-egusb:
- if (!cpu_is_mx35())
- clk_disable(mxc_ahb_clk);
-eenahb:
- if (!cpu_is_mx35())
- clk_put(mxc_ahb_clk);
- return ret;
-}
-
-void fsl_udc_clk_finalize(struct platform_device *pdev)
-{
- struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
-
- /* ULPI transceivers don't need usbpll */
- if (pdata->phy_mode == FSL_USB2_PHY_ULPI) {
- clk_disable(mxc_usb_clk);
- clk_put(mxc_usb_clk);
- mxc_usb_clk = NULL;
- }
-}
-
-void fsl_udc_clk_release(void)
-{
- if (mxc_usb_clk) {
- clk_disable(mxc_usb_clk);
- clk_put(mxc_usb_clk);
- }
- if (!cpu_is_mx35()) {
- clk_disable(mxc_ahb_clk);
- clk_put(mxc_ahb_clk);
- }
-}
diff --git a/drivers/usb/gadget/fsl_mxc_udc.c b/drivers/usb/gadget/fsl_mxc_udc.c
new file mode 100644
index 0000000..d0b8bde
--- /dev/null
+++ b/drivers/usb/gadget/fsl_mxc_udc.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2009
+ * Guennadi Liakhovetski, DENX Software Engineering, <lg@...x.de>
+ *
+ * Description:
+ * Helper routines for i.MX3x SoCs from Freescale, needed by the fsl_usb2_udc.c
+ * driver to function correctly on these systems.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/fsl_devices.h>
+#include <linux/platform_device.h>
+
+#include <mach/hardware.h>
+
+static struct clk *mxc_ahb_clk;
+static struct clk *mxc_usb_clk;
+
+int fsl_udc_clk_init(struct platform_device *pdev)
+{
+ struct fsl_usb2_platform_data *pdata;
+ unsigned long freq;
+ int ret;
+
+ pdata = pdev->dev.platform_data;
+
+ if (!cpu_is_mx35()) {
+ mxc_ahb_clk = clk_get(&pdev->dev, "usb_ahb");
+ if (IS_ERR(mxc_ahb_clk))
+ return PTR_ERR(mxc_ahb_clk);
+
+ ret = clk_enable(mxc_ahb_clk);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "clk_enable(\"usb_ahb\") failed\n");
+ goto eenahb;
+ }
+ }
+
+ /* make sure USB_CLK is running at 60 MHz +/- 1000 Hz */
+ mxc_usb_clk = clk_get(&pdev->dev, "usb");
+ if (IS_ERR(mxc_usb_clk)) {
+ dev_err(&pdev->dev, "clk_get(\"usb\") failed\n");
+ ret = PTR_ERR(mxc_usb_clk);
+ goto egusb;
+ }
+
+ if (!cpu_is_mx51()) {
+ freq = clk_get_rate(mxc_usb_clk);
+ if (pdata->phy_mode != FSL_USB2_PHY_ULPI &&
+ (freq < 59999000 || freq > 60001000)) {
+ dev_err(&pdev->dev, "USB_CLK=%lu, should be 60MHz\n", freq);
+ ret = -EINVAL;
+ goto eclkrate;
+ }
+ }
+
+ ret = clk_enable(mxc_usb_clk);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "clk_enable(\"usb_clk\") failed\n");
+ goto eenusb;
+ }
+
+ return 0;
+
+eenusb:
+eclkrate:
+ clk_put(mxc_usb_clk);
+ mxc_usb_clk = NULL;
+egusb:
+ if (!cpu_is_mx35())
+ clk_disable(mxc_ahb_clk);
+eenahb:
+ if (!cpu_is_mx35())
+ clk_put(mxc_ahb_clk);
+ return ret;
+}
+
+void fsl_udc_clk_finalize(struct platform_device *pdev)
+{
+ struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
+
+ /* ULPI transceivers don't need usbpll */
+ if (pdata->phy_mode == FSL_USB2_PHY_ULPI) {
+ clk_disable(mxc_usb_clk);
+ clk_put(mxc_usb_clk);
+ mxc_usb_clk = NULL;
+ }
+}
+
+void fsl_udc_clk_release(void)
+{
+ if (mxc_usb_clk) {
+ clk_disable(mxc_usb_clk);
+ clk_put(mxc_usb_clk);
+ }
+ if (!cpu_is_mx35()) {
+ clk_disable(mxc_ahb_clk);
+ clk_put(mxc_ahb_clk);
+ }
+}
--
1.6.0.4
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