Upstream linux also provide the additional optional bus clock.
Add support for it and also enable the baud and bus clock on probe.
Signed-off-by: Christian Marangi ansuelsmth@gmail.com --- drivers/serial/serial_mtk.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/serial/serial_mtk.c b/drivers/serial/serial_mtk.c index 3f569c68f22..78e8d9dc735 100644 --- a/drivers/serial/serial_mtk.c +++ b/drivers/serial/serial_mtk.c @@ -76,6 +76,7 @@ struct mtk_serial_regs { * driver * @regs: Register base of the serial port * @clk: The baud clock device + * @clk_bus: The bus clock device * @fixed_clk_rate: Fallback fixed baud clock rate if baud clock * device is not specified * @force_highspeed: Force using high-speed mode @@ -83,6 +84,7 @@ struct mtk_serial_regs { struct mtk_serial_priv { struct mtk_serial_regs __iomem *regs; struct clk clk; + struct clk clk_bus; u32 fixed_clk_rate; bool force_highspeed; }; @@ -220,6 +222,10 @@ static int mtk_serial_probe(struct udevice *dev) writel(UART_MCRVAL, &priv->regs->mcr); writel(UART_FCRVAL, &priv->regs->fcr);
+ clk_enable(&priv->clk); + if (priv->clk_bus.dev) + clk_enable(&priv->clk_bus); + return 0; }
@@ -250,6 +256,8 @@ static int mtk_serial_of_to_plat(struct udevice *dev) } }
+ clk_get_by_name(dev, "bus", &priv->clk_bus); + priv->force_highspeed = dev_read_bool(dev, "mediatek,force-highspeed");
return 0;