[PATCH v2,3/3] tty/serial: meson_uart: add the core clock handling to the driver

[Helmut Klein]

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 <hgkr.kl...@gmail.com>
---
 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