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, swboyd@chromium.org,
msavaliy@codeaurora.org, Akash Asthana <akashast@codeaurora.org>
Subject: [PATCH v5 1/3] tty: serial: qcom_geni_serial: IRQ cleanup
Date: Wed, 13 Nov 2019 16:18:31 +0530 [thread overview]
Message-ID: <1573642111-17479-1-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>
---
Changes in v5:
- No change.
Changes in v4:
- As per Stephen's comment, move ISR registration(later in probe) after
registering uart port with serial core.
- As per Greg's comment, corrected returning of PTR value from integer type
function(probe).
Changes in v3:
- As per Stephen's comment, using devm_kasprintf instead of scnprintf API.
drivers/tty/serial/qcom_geni_serial.c | 38 ++++++++++++++++++++++++-----------
1 file changed, 26 insertions(+), 12 deletions(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 14c6306..634054a 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>
@@ -101,7 +102,7 @@
struct qcom_geni_serial_port {
struct uart_port uport;
struct geni_se se;
- char name[20];
+ const char *name;
u32 tx_fifo_depth;
u32 tx_fifo_width;
u32 rx_fifo_depth;
@@ -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)
@@ -1297,6 +1291,12 @@ 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;
+ port->name = devm_kasprintf(uport->dev, GFP_KERNEL,
+ "qcom_geni_serial_%s%d",
+ uart_console(uport) ? "console" : "uart", uport->line);
+ if (!port->name)
+ return -ENOMEM;
+
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
@@ -1307,7 +1307,21 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
port->handle_rx = console ? handle_rx_console : handle_rx_uart;
if (!console)
device_create_file(uport->dev, &dev_attr_loopback);
- return uart_add_one_port(drv, uport);
+
+ ret = uart_add_one_port(drv, uport);
+ if (ret)
+ return ret;
+
+ 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);
+ uart_remove_one_port(drv, uport);
+ return ret;
+ }
+
+ return ret;
}
static int qcom_geni_serial_remove(struct platform_device *pdev)
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,\na Linux Foundation Collaborative Project
next reply other threads:[~2019-11-13 10:48 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-13 10:48 Akash Asthana [this message]
2019-11-13 10:56 ` [PATCH v5 1/3] tty: serial: qcom_geni_serial: IRQ cleanup Greg KH
2019-11-15 4:41 ` Akash Asthana
2019-11-15 4:52 ` Greg KH
2019-11-15 4:59 ` Akash Asthana
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