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authorJacky Bai <ping.bai@nxp.com>2019-04-25 08:10:08 +0000
committerStephen Boyd <sboyd@kernel.org>2019-04-29 16:02:01 -0700
commit8cd117e712e17bc9af07638d73261603ef8f4e8d (patch)
tree657487d5fece702df93cf2b7d4c89f70ba09d9cd /drivers/clk
parentb4a4cb5a0454cf48559d92cd1e8fb04d57194514 (diff)
clk: imx: keep uart clock on during system boot
Keep uart clocks enabled when earlyprintk or earlycon is active. Signed-off-by: Jacky Bai <ping.bai@nxp.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Diffstat (limited to 'drivers/clk')
-rw-r--r--drivers/clk/imx/clk-imx6sll.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/clk/imx/clk-imx6sll.c b/drivers/clk/imx/clk-imx6sll.c
index 9def76df0879..7eea448cb9a9 100644
--- a/drivers/clk/imx/clk-imx6sll.c
+++ b/drivers/clk/imx/clk-imx6sll.c
@@ -76,6 +76,20 @@ static u32 share_count_ssi1;
static u32 share_count_ssi2;
static u32 share_count_ssi3;
+static struct clk ** const uart_clks[] __initconst = {
+ &clks[IMX6SLL_CLK_UART1_IPG],
+ &clks[IMX6SLL_CLK_UART1_SERIAL],
+ &clks[IMX6SLL_CLK_UART2_IPG],
+ &clks[IMX6SLL_CLK_UART2_SERIAL],
+ &clks[IMX6SLL_CLK_UART3_IPG],
+ &clks[IMX6SLL_CLK_UART3_SERIAL],
+ &clks[IMX6SLL_CLK_UART4_IPG],
+ &clks[IMX6SLL_CLK_UART4_SERIAL],
+ &clks[IMX6SLL_CLK_UART5_IPG],
+ &clks[IMX6SLL_CLK_UART5_SERIAL],
+ NULL
+};
+
static void __init imx6sll_clocks_init(struct device_node *ccm_node)
{
struct device_node *np;
@@ -334,6 +348,8 @@ static void __init imx6sll_clocks_init(struct device_node *ccm_node)
clk_data.clk_num = ARRAY_SIZE(clks);
of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
+ imx_register_uart_clocks(uart_clks);
+
/* Lower the AHB clock rate before changing the clock source. */
clk_set_rate(clks[IMX6SLL_CLK_AHB], 99000000);