[POWERPC] cpm2: Add cpm2_set_pin().

This provides a generic way for board code to set up CPM pins, rather
than directly poking magic values into registers.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

2 files changed, 42 insertions, 0 deletions

diff --git a/arch/powerpc/sysdev/cpm2_common.c b/arch/powerpc/sysdev/cpm2_common.c
index c6dc0bf614b3..fc4c99565381 100644
--- a/arch/powerpc/sysdev/cpm2_common.c
+++ b/arch/powerpc/sysdev/cpm2_common.c
@@ -422,3 +422,36 @@ void *cpm_dpram_addr(unsigned long offset)
         return (void *)(im_dprambase + offset);
 }
 EXPORT_SYMBOL(cpm_dpram_addr);
+
+struct cpm2_ioports {
+        u32 dir, par, sor, odr, dat;
+        u32 res[3];
+};
+
+void cpm2_set_pin(int port, int pin, int flags)
+{
+        struct cpm2_ioports __iomem *iop =
+                (struct cpm2_ioports __iomem *)&cpm2_immr->im_ioport;
+
+        pin = 1 << (31 - pin);
+
+        if (flags & CPM_PIN_OUTPUT)
+                setbits32(&iop[port].dir, pin);
+        else
+                clrbits32(&iop[port].dir, pin);
+
+        if (!(flags & CPM_PIN_GPIO))
+                setbits32(&iop[port].par, pin);
+        else
+                clrbits32(&iop[port].par, pin);
+
+        if (flags & CPM_PIN_SECONDARY)
+                setbits32(&iop[port].sor, pin);
+        else
+                clrbits32(&iop[port].sor, pin);
+
+        if (flags & CPM_PIN_OPENDRAIN)
+                setbits32(&iop[port].odr, pin);
+        else
+                clrbits32(&iop[port].odr, pin);
+}
diff --git a/include/asm-powerpc/cpm2.h b/include/asm-powerpc/cpm2.h
index 41a45db0c8b1..d7b57ac55892 100644
--- a/include/asm-powerpc/cpm2.h
+++ b/include/asm-powerpc/cpm2.h
@@ -1247,5 +1247,14 @@ enum cpm_clk {
 extern int cpm2_clk_setup(enum cpm_clk_target target, int clock, int mode);
 extern int cpm2_smc_clk_setup(enum cpm_clk_target target, int clock);
 
+#define CPM_PIN_INPUT     0
+#define CPM_PIN_OUTPUT    1
+#define CPM_PIN_PRIMARY   0
+#define CPM_PIN_SECONDARY 2
+#define CPM_PIN_GPIO      4
+#define CPM_PIN_OPENDRAIN 8
+
+void cpm2_set_pin(int port, int pin, int flags);
+
 #endif /* __CPM2__ */
 #endif /* __KERNEL__ */