[PATCH] clk: imx: keep uart clock on during system boot

[PATCH] clk: imx: keep uart clock on during system boot

[Jacky Bai]

Keep uart clocks enabled when earlyprintk or
earlycon is active.

Signed-off-by: Jacky Bai <ping.bai@nxp.com>
---
 drivers/clk/imx/clk-imx6sll.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/clk/imx/clk-imx6sll.c b/drivers/clk/imx/clk-imx6sll.c
index 3bd2044cf25c..35217c2f9f62 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);
 
-- 
2.21.0

Re: [PATCH] clk: imx: keep uart clock on during system boot

[Stephen Boyd]

Quoting Jacky Bai (2019-04-25 01:10:08)
> Keep uart clocks enabled when earlyprintk or
> earlycon is active.
> 
> Signed-off-by: Jacky Bai <ping.bai@nxp.com>
> ---

Looks OK to me. Shawn, will you pick it up? Or should I apply directly?

Re: [PATCH] clk: imx: keep uart clock on during system boot

[Shawn Guo]

On Thu, Apr 25, 2019 at 04:56:38PM -0700, Stephen Boyd wrote:
> Quoting Jacky Bai (2019-04-25 01:10:08)
> > Keep uart clocks enabled when earlyprintk or
> > earlycon is active.
> > 
> > Signed-off-by: Jacky Bai <ping.bai@nxp.com>
> > ---
> 
> Looks OK to me. Shawn, will you pick it up? Or should I apply directly?

Stephen, please apply directly.

Shawn

Re: [PATCH] clk: imx: keep uart clock on during system boot

[Stephen Boyd]

Quoting Jacky Bai (2019-04-25 01:10:08)
> Keep uart clocks enabled when earlyprintk or
> earlycon is active.
> 
> Signed-off-by: Jacky Bai <ping.bai@nxp.com>
> ---

Applied to clk-next