From: Helmut Klein <hgkr.klein@gmail.com>
To: gregkh@linuxfoundation.org, carlo@caione.org, khilman@baylibre.com
Cc: Helmut Klein <hgkr.klein@gmail.com>,
linux-serial@vger.kernel.org, linux-amlogic@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v2,3/3] tty/serial: meson_uart: add the core clock handling to the driver
Date: Tue, 28 Mar 2017 11:25:45 +0200 [thread overview]
Message-ID: <20170328092545.4644-4-hgkr.klein@gmail.com> (raw)
In-Reply-To: <20170328092545.4644-1-hgkr.klein@gmail.com>
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.klein@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
next prev parent reply other threads:[~2017-03-28 9:26 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-28 9:25 [PATCH v2,0/3] tty/serial: meson_uart: add support for core clock handling Helmut Klein
2017-03-28 9:25 ` [PATCH v2,1/3] meson_uart: expose CLKID_UARTx Helmut Klein
2017-03-28 15:51 ` Jerome Brunet
2017-03-28 18:18 ` Helmut Klein
2017-03-28 19:14 ` Jerome Brunet
2017-03-28 21:24 ` Martin Blumenstingl
2017-03-29 6:21 ` Jerome Brunet
2017-03-29 20:21 ` Kevin Hilman
2017-03-31 15:37 ` Jerome Brunet
2017-03-31 17:03 ` Helmut Klein
2017-03-28 9:25 ` [PATCH v2,2/3] tty/serial: meson_uart: add documentation for the dt-bindings Helmut Klein
2017-03-28 10:05 ` Mark Rutland
2017-03-28 18:20 ` Helmut Klein
2017-03-28 9:25 ` Helmut Klein [this message]
2017-03-28 19:16 ` [PATCH v2, 3/3] tty/serial: meson_uart: add the core clock handling to the driver Jerome Brunet
2017-03-29 9:47 ` Helmut Klein
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