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From: Tamseel Shams <m.shams@samsung.com>
To: kgene@kernel.org, krzk@kernel.org, gregkh@linuxfoundation.org,
	jslaby@suse.com
Cc: linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org, linux-serial@vger.kernel.org,
	linux-kernel@vger.kernel.org, alim.akhtar@samsung.com,
	Tamseel Shams <m.shams@samsung.com>
Subject: [PATCH v3] serial: samsung: Re-factors UART IRQ resource for various Samsung SoC
Date: Sat,  4 Jul 2020 19:36:46 +0530	[thread overview]
Message-ID: <20200704140646.66528-1-m.shams@samsung.com> (raw)
In-Reply-To: CGME20200704142658epcas5p254ae909fedb07dda58cece5d6d5252b4@epcas5p2.samsung.com

In few older Samsung SoCs like s3c2410, s3c2412
and s3c2440, UART IP is having 2 interrupt lines.
However, in other SoCs like s3c6400, s5pv210,
exynos5433, and exynos4210 UART is having only 1
interrupt line. Due to this, "platform_get_irq(platdev, 1)"
call in the driver gives the following warning:
"IRQ index 1 not found" on recent platforms.

This patch re-factors the IRQ resources handling for
each platform and hence fixing the above warnings seen
on some platforms.

Signed-off-by: Tamseel Shams <m.shams@samsung.com>
---
Removed the logic of irq_cnt and directly using
s3c24xx_serial_has_interrupt_mask() to check for
number of interrupt lines.

 drivers/tty/serial/samsung_tty.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index 6ef614d8648c..8a955f3d8975 100644
--- a/drivers/tty/serial/samsung_tty.c
+++ b/drivers/tty/serial/samsung_tty.c
@@ -1908,10 +1908,13 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
 	else {
 		port->irq = ret;
 		ourport->rx_irq = ret;
-		ourport->tx_irq = ret + 1;
+		if (s3c24xx_serial_has_interrupt_mask(port))
+			ourport->tx_irq = ret;
+		else
+			ourport->tx_irq = ret + 1;
 	}
 
-	ret = platform_get_irq(platdev, 1);
+	ret = platform_get_irq_optional(platdev, 1);
 	if (ret > 0)
 		ourport->tx_irq = ret;
 	/*
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
From: Tamseel Shams <m.shams@samsung.com>
To: kgene@kernel.org, krzk@kernel.org, gregkh@linuxfoundation.org,
	jslaby@suse.com
Cc: linux-samsung-soc@vger.kernel.org, linux-serial@vger.kernel.org,
	linux-kernel@vger.kernel.org, alim.akhtar@samsung.com,
	Tamseel Shams <m.shams@samsung.com>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3] serial: samsung: Re-factors UART IRQ resource for various Samsung SoC
Date: Sat,  4 Jul 2020 19:36:46 +0530	[thread overview]
Message-ID: <20200704140646.66528-1-m.shams@samsung.com> (raw)
In-Reply-To: CGME20200704142658epcas5p254ae909fedb07dda58cece5d6d5252b4@epcas5p2.samsung.com

In few older Samsung SoCs like s3c2410, s3c2412
and s3c2440, UART IP is having 2 interrupt lines.
However, in other SoCs like s3c6400, s5pv210,
exynos5433, and exynos4210 UART is having only 1
interrupt line. Due to this, "platform_get_irq(platdev, 1)"
call in the driver gives the following warning:
"IRQ index 1 not found" on recent platforms.

This patch re-factors the IRQ resources handling for
each platform and hence fixing the above warnings seen
on some platforms.

Signed-off-by: Tamseel Shams <m.shams@samsung.com>
---
Removed the logic of irq_cnt and directly using
s3c24xx_serial_has_interrupt_mask() to check for
number of interrupt lines.

 drivers/tty/serial/samsung_tty.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index 6ef614d8648c..8a955f3d8975 100644
--- a/drivers/tty/serial/samsung_tty.c
+++ b/drivers/tty/serial/samsung_tty.c
@@ -1908,10 +1908,13 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
 	else {
 		port->irq = ret;
 		ourport->rx_irq = ret;
-		ourport->tx_irq = ret + 1;
+		if (s3c24xx_serial_has_interrupt_mask(port))
+			ourport->tx_irq = ret;
+		else
+			ourport->tx_irq = ret + 1;
 	}
 
-	ret = platform_get_irq(platdev, 1);
+	ret = platform_get_irq_optional(platdev, 1);
 	if (ret > 0)
 		ourport->tx_irq = ret;
 	/*
-- 
2.17.1


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       reply	other threads:[~2020-07-04 14:27 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20200704142658epcas5p254ae909fedb07dda58cece5d6d5252b4@epcas5p2.samsung.com>
2020-07-04 14:06 ` Tamseel Shams [this message]
2020-07-04 14:06   ` [PATCH v3] serial: samsung: Re-factors UART IRQ resource for various Samsung SoC Tamseel Shams
2020-07-06  8:13   ` Krzysztof Kozlowski
2020-07-06  8:13     ` Krzysztof Kozlowski
2020-07-13 14:03     ` M Tamseel Shams
2020-07-13 14:03       ` M Tamseel Shams

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