usb: udc: lpc32xx: remove direct access to clock controller registers

Direct access to clock control registers can be safely removed, the
task of clock management is done by platform clock driver based on
common clock framework.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>

drivers/usb/gadget/udc/lpc32xx_udc.c

@@ -49,7 +49,6 @@
 #endif
 
 #include <mach/hardware.h>
-#include <mach/platform.h>
 
 /*
  * USB device configuration structure
@@ -210,16 +209,6 @@ static inline struct lpc32xx_udc *to_udc(struct usb_gadget *g)
 
 #define UDCA_BUFF_SIZE (128)
 
-/* TODO: When the clock framework is introduced in LPC32xx, IO_ADDRESS will
- * be replaced with an inremap()ed pointer
- * */
-#define USB_CTRL		IO_ADDRESS(LPC32XX_CLK_PM_BASE + 0x64)
-
-/* USB_CTRL bit defines */
-#define USB_SLAVE_HCLK_EN	(1 << 24)
-#define USB_HOST_NEED_CLK_EN	(1 << 21)
-#define USB_DEV_NEED_CLK_EN	(1 << 22)
-
 /**********************************************************************
  * USB device controller register offsets
  **********************************************************************/
@@ -639,9 +628,6 @@ static void isp1301_udc_configure(struct lpc32xx_udc *udc)
 	i2c_smbus_write_byte_data(udc->isp1301_i2c_client,
 		ISP1301_I2C_INTERRUPT_RISING, INT_VBUS_VLD);
 
-	/* Enable usb_need_clk clock after transceiver is initialized */
-	writel((readl(USB_CTRL) | USB_DEV_NEED_CLK_EN), USB_CTRL);
-
 	dev_info(udc->dev, "ISP1301 Vendor ID  : 0x%04x\n",
 		 i2c_smbus_read_word_data(udc->isp1301_i2c_client, 0x00));
 	dev_info(udc->dev, "ISP1301 Product ID : 0x%04x\n",
@@ -983,11 +969,6 @@ static void udc_clk_set(struct lpc32xx_udc *udc, int enable)
 
 		/* 48MHz PLL up */
 		clk_prepare_enable(udc->usb_pll_clk);
-
-		/* Enable the USB device clock */
-		writel(readl(USB_CTRL) | USB_DEV_NEED_CLK_EN,
-			     USB_CTRL);
-
 		clk_prepare_enable(udc->usb_otg_clk);
 	} else {
 		if (!udc->clocked)
@@ -999,11 +980,6 @@ static void udc_clk_set(struct lpc32xx_udc *udc, int enable)
 
 		/* 48MHz PLL dpwn */
 		clk_disable_unprepare(udc->usb_pll_clk);
-
-		/* Disable the USB device clock */
-		writel(readl(USB_CTRL) & ~USB_DEV_NEED_CLK_EN,
-			     USB_CTRL);
-
 		clk_disable_unprepare(udc->usb_otg_clk);
 	}
 }
@@ -3125,9 +3101,6 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
 		goto io_map_fail;
 	}
 
-	/* Enable AHB slave USB clock, needed for further USB clock control */
-	writel(USB_SLAVE_HCLK_EN | (1 << 19), USB_CTRL);
-
 	/* Get required clocks */
 	udc->usb_pll_clk = clk_get(&pdev->dev, "ck_pll5");
 	if (IS_ERR(udc->usb_pll_clk)) {
@@ -3161,8 +3134,6 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
 		goto pll_set_fail;
 	}
 
-	writel(readl(USB_CTRL) | USB_DEV_NEED_CLK_EN, USB_CTRL);
-
 	/* Enable USB device clock */
 	retval = clk_prepare_enable(udc->usb_slv_clk);
 	if (retval < 0) {