powerpc/82xx: Add CPM USB Gadget support for MPC8272ADS boards

- Add usb node;
- Configure pins and clocks;
- Enable USB function in BCSR.

The support was successfully tested using serial and ethernet gadget
drivers.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

2 files changed, 22 insertions, 0 deletions

diff --git a/arch/powerpc/boot/dts/mpc8272ads.dts b/arch/powerpc/boot/dts/mpc8272ads.dts
index 60f332778e41..e802ebd88cb1 100644
--- a/arch/powerpc/boot/dts/mpc8272ads.dts
+++ b/arch/powerpc/boot/dts/mpc8272ads.dts
@@ -173,6 +173,14 @@
                                 fsl,cpm-command = <0xce00000>;
                         };
 
+                        usb@11b60 {
+                                compatible = "fsl,mpc8272-cpm-usb";
+                                reg = <0x11b60 0x40 0x8b00 0x100>;
+                                interrupts = <11 8>;
+                                interrupt-parent = <&PIC>;
+                                mode = "peripheral";
+                        };
+
                         mdio@10d40 {
                                 device_type = "mdio";
                                 compatible = "fsl,mpc8272ads-mdio-bitbang",
diff --git a/arch/powerpc/platforms/82xx/mpc8272_ads.c b/arch/powerpc/platforms/82xx/mpc8272_ads.c
index 67e2184f4243..30394b409b3f 100644
--- a/arch/powerpc/platforms/82xx/mpc8272_ads.c
+++ b/arch/powerpc/platforms/82xx/mpc8272_ads.c
@@ -99,6 +99,15 @@ static struct cpm_pin mpc8272_ads_pins[] = {
         /* I2C */
         {3, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
         {3, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
+
+        /* USB */
+        {2, 10, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+        {2, 11, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+        {2, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
+        {2, 24, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
+        {3, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
+        {3, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
+        {3, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 };
 
 static void __init init_ioports(void)
@@ -112,6 +121,8 @@ static void __init init_ioports(void)
 
         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
+        cpm2_clk_setup(CPM_CLK_SCC3, CPM_CLK8, CPM_CLK_RX);
+        cpm2_clk_setup(CPM_CLK_SCC3, CPM_CLK8, CPM_CLK_TX);
         cpm2_clk_setup(CPM_CLK_SCC4, CPM_BRG4, CPM_CLK_RX);
         cpm2_clk_setup(CPM_CLK_SCC4, CPM_BRG4, CPM_CLK_TX);
         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK11, CPM_CLK_RX);
@@ -147,6 +158,7 @@ static void __init mpc8272_ads_setup_arch(void)
 #define BCSR1_FETH_RST          0x04000000
 #define BCSR1_RS232_EN1         0x02000000
 #define BCSR1_RS232_EN2         0x01000000
+#define BCSR3_USB_nEN           0x80000000
 #define BCSR3_FETHIEN2          0x10000000
 #define BCSR3_FETH2_RST         0x08000000
 
@@ -156,6 +168,8 @@ static void __init mpc8272_ads_setup_arch(void)
         clrbits32(&bcsr[3], BCSR3_FETHIEN2);
         setbits32(&bcsr[3], BCSR3_FETH2_RST);
 
+        clrbits32(&bcsr[3], BCSR3_USB_nEN);
+
         iounmap(bcsr);
 
         init_ioports();