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authorRanjani Vaidyanathan <ra5478@freescale.com>2012-10-14 07:41:05 -0500
committerRanjani Vaidyanathan <ra5478@freescale.com>2012-10-14 16:26:06 -0500
commit464e5eb0311c9c9ae2efc1d11efa4f476b913513 (patch)
tree1a8c0145f0370fa4c61ea1793a6d8e03e75c2ef9 /drivers
parent0002d6f2cd3c5190a3d7c3c976a3abf1153ad9d1 (diff)
ENGR00229470-2 MX6SL-Add support for debug UART to be sourced from 24MHz.
If "debug_uart" is specified in the command line, uart will be sourced from 24MHz XTAL. This is required for getting the correct power measurements on MX6SL. Certain analog power optimizations are done only if ALL PLLs are bypassed on MX6SL. To verify this path, we need to ensure that UART is not sourced from PLL3. Signed-off-by: Ranjani Vaidyanathan <ra5478@freescale.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/tty/serial/imx.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 8a66f3eeb992..5e9594d744d9 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1742,6 +1742,8 @@ static int serial_imx_resume(struct platform_device *dev)
return 0;
}
+extern int uart_at_24;
+
static int serial_imx_probe(struct platform_device *pdev)
{
struct imx_port *sport;
@@ -1788,6 +1790,9 @@ static int serial_imx_probe(struct platform_device *pdev)
ret = PTR_ERR(sport->clk);
goto unmap;
}
+ if (uart_at_24)
+ clk_set_parent(sport->clk, clk_get(NULL, "osc"));
+
clk_enable(sport->clk);
sport->port.uartclk = clk_get_rate(sport->clk);