[PATCH v3 3/4] tty/serial: meson_uart: add the core clock handling to the driver
From: Helmut Klein <hidden>
Date: 2017-03-31 16:55:09
Also in:
linux-amlogic, linux-serial, lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
This patch gets the core clock as provided by the DT and enables it. The code was taken from Amlogic's serial driver, and was tested on my board. Signed-off-by: Helmut Klein <redacted> --- drivers/tty/serial/meson_uart.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
index 60f16795d16b..cb99112288eb 100644
--- a/drivers/tty/serial/meson_uart.c
+++ b/drivers/tty/serial/meson_uart.c@@ -600,6 +600,7 @@ static int meson_uart_probe(struct platform_device *pdev) struct resource *res_mem, *res_irq; struct uart_port *port; struct clk *clk; + struct clk *core_clk; int ret = 0; if (pdev->dev.of_node)
@@ -625,6 +626,15 @@ static int meson_uart_probe(struct platform_device *pdev) if (!port) return -ENOMEM; + core_clk = devm_clk_get(&pdev->dev, "core"); + if (!IS_ERR(core_clk)) { + ret = clk_prepare_enable(core_clk); + if (ret) { + dev_err(&pdev->dev, "couldn't enable clkc\n"); + return ret; + } + } + clk = clk_get(&pdev->dev, NULL); if (IS_ERR(clk)) return PTR_ERR(clk); --
2.11.0