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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>
This commit is contained in:
Lucas Stach 2015-09-21 18:53:58 +02:00 committed by Shawn Guo
parent 55adc61c56
commit 517c7f9302
1 changed files with 12 additions and 0 deletions
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12
drivers/clk/imx/clk-imx25.c
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@ -86,6 +86,16 @@ enum mx25_clks {
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 @@ static int __init __mx25_clocks_init(unsigned long osc_rate,
*/
clk_set_parent(clk[cko_sel], clk[ipg]);
imx_register_uart_clocks(uart_clks);
return 0;
}