[POWERPC] Move CPM command handling into the cpm drivers
This patch moves the CPM command handling into commproc.c
for CPM1 and cpm2_common.c. This is yet another preparation
to get rid of drivers accessing the CPM via the global cpmp.
Signed-off-by: Jochen Friedrich <jochen@scram.de>
Acked-by: Scott Wood <scottwood@freescale.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vitaly Bordug <vitb@kernel.crashing.org>
diff --git a/arch/powerpc/sysdev/cpm2_common.c b/arch/powerpc/sysdev/cpm2_common.c
index 859362f..0a70545 100644
--- a/arch/powerpc/sysdev/cpm2_common.c
+++ b/arch/powerpc/sysdev/cpm2_common.c
@@ -83,6 +83,31 @@
cpmp = &cpm2_immr->im_cpm;
}
+static DEFINE_SPINLOCK(cmd_lock);
+
+#define MAX_CR_CMD_LOOPS 10000
+
+int cpm_command(u32 command, u8 opcode)
+{
+ int i, ret;
+ unsigned long flags;
+
+ spin_lock_irqsave(&cmd_lock, flags);
+
+ ret = 0;
+ out_be32(&cpmp->cp_cpcr, command | opcode | CPM_CR_FLG);
+ for (i = 0; i < MAX_CR_CMD_LOOPS; i++)
+ if ((in_be32(&cpmp->cp_cpcr) & CPM_CR_FLG) == 0)
+ goto out;
+
+ printk(KERN_ERR "%s(): Not able to issue CPM command\n", __FUNCTION__);
+ ret = -EIO;
+out:
+ spin_unlock_irqrestore(&cmd_lock, flags);
+ return ret;
+}
+EXPORT_SYMBOL(cpm_command);
+
/* Set a baud rate generator. This needs lots of work. There are
* eight BRGs, which can be connected to the CPM channels or output
* as clocks. The BRGs are in two different block of internal