3 files changed, 21 insertions, 7 deletions

diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig
index 18a71839dc9e..4c900efa164e 100644
--- a/arch/powerpc/platforms/Kconfig
+++ b/arch/powerpc/platforms/Kconfig
@@ -283,6 +283,7 @@ config FSL_ULI1575
 
 config CPM
         bool
+        select PPC_CLOCK
 
 config OF_RTC
         bool
diff --git a/drivers/serial/cpm_uart/cpm_uart.h b/drivers/serial/cpm_uart/cpm_uart.h
index 5999ef5ac78e..7274b527a3c1 100644
--- a/drivers/serial/cpm_uart/cpm_uart.h
+++ b/drivers/serial/cpm_uart/cpm_uart.h
@@ -77,6 +77,7 @@ struct uart_cpm_port {
         unsigned char           *rx_buf;
         u32                     flags;
         void                    (*set_lineif)(struct uart_cpm_port *);
+        struct clk              *clk;
         u8                      brg;
         uint                     dp_addr;
         void                    *mem_addr;
diff --git a/drivers/serial/cpm_uart/cpm_uart_core.c b/drivers/serial/cpm_uart/cpm_uart_core.c
index 5e0c17f71653..25efca5a7a1f 100644
--- a/drivers/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/serial/cpm_uart/cpm_uart_core.c
@@ -45,6 +45,7 @@
 #include <linux/of_platform.h>
 #include <linux/gpio.h>
 #include <linux/of_gpio.h>
+#include <linux/clk.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
@@ -596,7 +597,10 @@ static void cpm_uart_set_termios(struct uart_port *port,
                 out_be16(&sccp->scc_psmr, (sbits << 12) | scval);
         }
 
-        cpm_set_brg(pinfo->brg - 1, baud);
+        if (pinfo->clk)
+                clk_set_rate(pinfo->clk, baud);
+        else
+                cpm_set_brg(pinfo->brg - 1, baud);
         spin_unlock_irqrestore(&port->lock, flags);
 }
 
@@ -1023,13 +1027,21 @@ static int cpm_uart_init_port(struct device_node *np,
         int ret;
         int i;
 
-        data = of_get_property(np, "fsl,cpm-brg", &len);
-        if (!data || len != 4) {
-                printk(KERN_ERR "CPM UART %s has no/invalid "
-                                "fsl,cpm-brg property.\n", np->name);
-                return -EINVAL;
+        data = of_get_property(np, "clock", NULL);
+        if (data) {
+                struct clk *clk = clk_get(NULL, (const char*)data);
+                if (!IS_ERR(clk))
+                        pinfo->clk = clk;
+        }
+        if (!pinfo->clk) {
+                data = of_get_property(np, "fsl,cpm-brg", &len);
+                if (!data || len != 4) {
+                        printk(KERN_ERR "CPM UART %s has no/invalid "
+                                        "fsl,cpm-brg property.\n", np->name);
+                        return -EINVAL;
+                }
+                pinfo->brg = *data;
         }
-        pinfo->brg = *data;
 
         data = of_get_property(np, "fsl,cpm-command", &len);
         if (!data || len != 4) {