Re: [PATCH v3] serial: samsung: Re-factors UART IRQ resource for various Samsung SoC
From: Krzysztof Kozlowski <krzk@kernel.org>
Date: 2020-07-06 08:13:14
Also in:
linux-samsung-soc, linux-serial, lkml
On Sat, Jul 04, 2020 at 07:36:46PM +0530, Tamseel Shams wrote:
quoted hunk ↗ jump to hunk
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 <redacted> --- 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;
Hi, I don't understand: Why do you assign here the same interrupt as RX? Best regards, Krzysztof
+ 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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