Commit 89981a6f authored by Lucas Stach's avatar Lucas Stach Committed by Shawn Guo
Browse files

clk: imx5: 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 57d5a4c3

drivers/clk/imx/clk-imx51-imx53.c

+16 −0
Original line number Diff line number Diff line
@@ -130,6 +130,20 @@ static const char *cpu_podf_sels[] = { "pll1_sw", "step_sel" }; 
static struct clk *clk[IMX5_CLK_END];

static struct clk_onecell_data clk_data;



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

	&clk[IMX5_CLK_UART1_IPG_GATE],

	&clk[IMX5_CLK_UART1_PER_GATE],

	&clk[IMX5_CLK_UART2_IPG_GATE],

	&clk[IMX5_CLK_UART2_PER_GATE],

	&clk[IMX5_CLK_UART3_IPG_GATE],

	&clk[IMX5_CLK_UART3_PER_GATE],

	&clk[IMX5_CLK_UART4_IPG_GATE],

	&clk[IMX5_CLK_UART4_PER_GATE],

	&clk[IMX5_CLK_UART5_IPG_GATE],

	&clk[IMX5_CLK_UART5_PER_GATE],

	NULL

};



static void __init mx5_clocks_common_init(void __iomem *ccm_base)

{

	clk[IMX5_CLK_DUMMY]		= imx_clk_fixed("dummy", 0);
@@ -310,6 +324,8 @@ static void __init mx5_clocks_common_init(void __iomem *ccm_base) 
	clk_prepare_enable(clk[IMX5_CLK_TMAX1]);

	clk_prepare_enable(clk[IMX5_CLK_TMAX2]); /* esdhc2, fec */

	clk_prepare_enable(clk[IMX5_CLK_TMAX3]); /* esdhc1, esdhc4 */



	imx_register_uart_clocks(uart_clks);

}



static void __init mx50_clocks_init(struct device_node *np)

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