clk: imx25: retain early UART clocks during kernel init
Make sure to keep UART clocks enabled during kernel init if
earlyprintk or earlycon are active.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
diff --git a/drivers/clk/imx/clk-imx25.c b/drivers/clk/imx/clk-imx25.c
index ec1a4c1..c4c141c 100644
--- a/drivers/clk/imx/clk-imx25.c
+++ b/drivers/clk/imx/clk-imx25.c
@@ -86,6 +86,16 @@
static struct clk *clk[clk_max];
+static struct clk ** const uart_clks[] __initconst = {
+ &clk[uart_ipg_per],
+ &clk[uart1_ipg],
+ &clk[uart2_ipg],
+ &clk[uart3_ipg],
+ &clk[uart4_ipg],
+ &clk[uart5_ipg],
+ NULL
+};
+
static int __init __mx25_clocks_init(unsigned long osc_rate,
void __iomem *ccm_base)
{
@@ -233,6 +243,8 @@
*/
clk_set_parent(clk[cko_sel], clk[ipg]);
+ imx_register_uart_clocks(uart_clks);
+
return 0;
}