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56 lines
1.7 KiB
Diff
56 lines
1.7 KiB
Diff
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From 317f8659bba01b307cbe4e9902d4e3d333fd7164 Mon Sep 17 00:00:00 2001
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From: Jonas Gorski <jonas.gorski@gmail.com>
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Date: Sun, 16 Jul 2017 12:39:17 +0200
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Subject: [PATCH V2 4/8] tty/bcm63xx_uart: allow naming clock in device tree
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Codify using a named clock for the refclk of the uart. This makes it
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easier if we might need to add a gating clock (like present on the
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BCM6345).
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Acked-by: Rob Herring <robh@kernel.org>
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Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
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Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
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---
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Documentation/devicetree/bindings/serial/brcm,bcm6345-uart.txt | 6 ++++++
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drivers/tty/serial/bcm63xx_uart.c | 6 ++++--
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2 files changed, 10 insertions(+), 2 deletions(-)
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--- a/Documentation/devicetree/bindings/serial/brcm,bcm6345-uart.txt
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+++ b/Documentation/devicetree/bindings/serial/brcm,bcm6345-uart.txt
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@@ -11,6 +11,11 @@ Required properties:
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- clocks: Clock driving the hardware; used to figure out the baud rate
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divisor.
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+
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+Optional properties:
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+
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+- clock-names: Should be "refclk".
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+
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Example:
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uart0: serial@14e00520 {
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@@ -19,6 +24,7 @@ Example:
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interrupt-parent = <&periph_intc>;
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interrupts = <2>;
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clocks = <&periph_clk>;
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+ clock-names = "refclk";
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};
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clocks {
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--- a/drivers/tty/serial/bcm63xx_uart.c
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+++ b/drivers/tty/serial/bcm63xx_uart.c
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@@ -837,8 +837,10 @@ static int bcm_uart_probe(struct platfor
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if (!res_irq)
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return -ENODEV;
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- clk = pdev->dev.of_node ? of_clk_get(pdev->dev.of_node, 0) :
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- clk_get(&pdev->dev, "refclk");
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+ clk = clk_get(&pdev->dev, "refclk");
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+ if (IS_ERR(clk) && pdev->dev.of_node)
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+ clk = of_clk_get(pdev->dev.of_node, 0);
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+
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if (IS_ERR(clk))
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return -ENODEV;
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