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clk: imx31: retain early UART clocks during kernel init

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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 18:54:00 +02:00 committed by Shawn Guo
parent 6f18713163
commit 5c678cdd02
1 changed files with 12 additions and 0 deletions
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12
drivers/clk/imx/clk-imx31.c
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@ -62,6 +62,16 @@ enum mx31_clks {
static struct clk *clk[clk_max];
static struct clk_onecell_data clk_data;
static struct clk ** const uart_clks[] __initconst = {
&clk[ipg],
&clk[uart1_gate],
&clk[uart2_gate],
&clk[uart3_gate],
&clk[uart4_gate],
&clk[uart5_gate],
NULL
};
int __init mx31_clocks_init(unsigned long fref)
{
void __iomem *base;
@ -200,6 +210,8 @@ int __init mx31_clocks_init(unsigned long fref)
mx31_revision();
clk_disable_unprepare(clk[iim_gate]);
imx_register_uart_clocks(uart_clks);
mxc_timer_init(MX31_GPT1_BASE_ADDR, MX31_INT_GPT, GPT_TYPE_IMX31);
return 0;