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-rw-r--r--arch/powerpc/platforms/Kconfig1
-rw-r--r--drivers/serial/cpm_uart/cpm_uart.h1
-rw-r--r--drivers/serial/cpm_uart/cpm_uart_core.c26
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) {