From: Akash Asthana <akashast@codeaurora.org>
To: gregkh@linuxfoundation.org
Cc: linux-arm-msm@vger.kernel.org, linux-serial@vger.kernel.org,
mgautam@codeaurora.org, bjorn.andersson@linaro.org,
swboyd@chromium.org, Akash Asthana <akashast@codeaurora.org>
Subject: [PATCH V2 1/2] tty: serial: qcom_geni_serial: IRQ cleanup
Date: Thu, 10 Oct 2019 15:16:03 +0530 [thread overview]
Message-ID: <1570700763-17319-1-git-send-email-akashast@codeaurora.org> (raw)
Move ISR registration from startup to probe function to avoid registering
it everytime when the port open is called for driver.
Signed-off-by: Akash Asthana <akashast@codeaurora.org>
---
drivers/tty/serial/qcom_geni_serial.c | 24 ++++++++++++++----------
1 file changed, 14 insertions(+), 10 deletions(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 14c6306..5180cd8 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -9,6 +9,7 @@
#include <linux/console.h>
#include <linux/io.h>
#include <linux/iopoll.h>
+#include <linux/irq.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
@@ -830,7 +831,7 @@ static void qcom_geni_serial_shutdown(struct uart_port *uport)
if (uart_console(uport))
console_stop(uport->cons);
- free_irq(uport->irq, uport);
+ disable_irq(uport->irq);
spin_lock_irqsave(&uport->lock, flags);
qcom_geni_serial_stop_tx(uport);
qcom_geni_serial_stop_rx(uport);
@@ -890,21 +891,14 @@ static int qcom_geni_serial_startup(struct uart_port *uport)
int ret;
struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
- scnprintf(port->name, sizeof(port->name),
- "qcom_serial_%s%d",
- (uart_console(uport) ? "console" : "uart"), uport->line);
-
if (!port->setup) {
ret = qcom_geni_serial_port_setup(uport);
if (ret)
return ret;
}
+ enable_irq(uport->irq);
- ret = request_irq(uport->irq, qcom_geni_serial_isr, IRQF_TRIGGER_HIGH,
- port->name, uport);
- if (ret)
- dev_err(uport->dev, "Failed to get IRQ ret %d\n", ret);
- return ret;
+ return 0;
}
static unsigned long get_clk_cfg(unsigned long clk_freq)
@@ -1297,11 +1291,21 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
port->rx_fifo_depth = DEF_FIFO_DEPTH_WORDS;
port->tx_fifo_width = DEF_FIFO_WIDTH_BITS;
+ scnprintf(port->name, sizeof(port->name), "qcom_geni_serial_%s%d",
+ (uart_console(uport) ? "console" : "uart"), uport->line);
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
uport->irq = irq;
+ irq_set_status_flags(uport->irq, IRQ_NOAUTOEN);
+ ret = devm_request_irq(uport->dev, uport->irq, qcom_geni_serial_isr,
+ IRQF_TRIGGER_HIGH, port->name, uport);
+ if (ret) {
+ dev_err(uport->dev, "Failed to get IRQ ret %d\n", ret);
+ return ret;
+ }
+
uport->private_data = drv;
platform_set_drvdata(pdev, port);
port->handle_rx = console ? handle_rx_console : handle_rx_uart;
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,\na Linux Foundation Collaborative Project
next reply other threads:[~2019-10-10 9:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-10 9:46 Akash Asthana [this message]
2019-10-10 14:19 ` [PATCH V2 1/2] tty: serial: qcom_geni_serial: IRQ cleanup Stephen Boyd
2019-10-11 7:39 ` Akash Asthana
2019-10-15 20:11 ` Stephen Boyd
2019-10-17 11:10 ` Akash Asthana
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