Commit 6f187131 authored by Lucas Stach's avatar Lucas Stach Committed by Shawn Guo
Browse files

clk: imx27: 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: default avatarLucas Stach <l.stach@pengutronix.de>
Signed-off-by: default avatarShawn Guo <shawnguo@kernel.org>
parent 517c7f93

drivers/clk/imx/clk-imx27.c

+13 −0
Original line number Diff line number Diff line
@@ -47,6 +47,17 @@ static const char *ssi_sel_clks[] = { "spll_gate", "mpll", }; 
static struct clk *clk[IMX27_CLK_MAX];

static struct clk_onecell_data clk_data;



static struct clk ** const uart_clks[] __initconst = {

	&clk[IMX27_CLK_PER1_GATE],

	&clk[IMX27_CLK_UART1_IPG_GATE],

	&clk[IMX27_CLK_UART2_IPG_GATE],

	&clk[IMX27_CLK_UART3_IPG_GATE],

	&clk[IMX27_CLK_UART4_IPG_GATE],

	&clk[IMX27_CLK_UART5_IPG_GATE],

	&clk[IMX27_CLK_UART6_IPG_GATE],

	NULL

};



static void __init _mx27_clocks_init(unsigned long fref)

{

	BUG_ON(!ccm);
@@ -163,6 +174,8 @@ static void __init _mx27_clocks_init(unsigned long fref) 


	clk_prepare_enable(clk[IMX27_CLK_EMI_AHB_GATE]);



	imx_register_uart_clocks(uart_clks);



	imx_print_silicon_rev("i.MX27", mx27_revision());

}