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authorLucas Stach <l.stach@pengutronix.de>2015-09-21 19:54:02 +0300
committerShawn Guo <shawnguo@kernel.org>2015-09-26 07:58:59 +0300
commit89981a6f7bbe5b98c3f9c8e01ca53c1f7b28030d (patch)
tree2ac09cd169c7f5d19baea3de8a0b723472489d96 /drivers/clk/imx
parent57d5a4c3ed001f813f1c8e1609db83c84d0e88cf (diff)
downloadlinux-89981a6f7bbe5b98c3f9c8e01ca53c1f7b28030d.tar.xz
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: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Diffstat (limited to 'drivers/clk/imx')
-rw-r--r--drivers/clk/imx/clk-imx51-imx53.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/clk/imx/clk-imx51-imx53.c b/drivers/clk/imx/clk-imx51-imx53.c
index a7e4f394be0d..c6770348d2ab 100644
--- a/drivers/clk/imx/clk-imx51-imx53.c
+++ b/drivers/clk/imx/clk-imx51-imx53.c
@@ -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)