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: [RFC PATCH] serial: samsung: Re-factors UART IRQ resource for various Samsung SoC Date: Mon, 15 Jun 2020 17:56:09 +0530 [thread overview] Message-ID: <20200615122609.71884-1-m.shams@samsung.com> (raw) In-Reply-To: CGME20200615124355epcas5p446ae2f1b63331ef87334cd7d696c3c43@epcas5p4.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> --- drivers/tty/serial/samsung_tty.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c index 6ef614d8648c..078dcb3e316f 100644 --- a/drivers/tty/serial/samsung_tty.c +++ b/drivers/tty/serial/samsung_tty.c @@ -60,6 +60,7 @@ struct s3c24xx_uart_info { char *name; unsigned int type; unsigned int fifosize; + unsigned int irq_cnt; unsigned long rx_fifomask; unsigned long rx_fifoshift; unsigned long rx_fifofull; @@ -1908,12 +1909,17 @@ 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 (ourport->info->irq_cnt == 1) + ourport->tx_irq = ret; + else + ourport->tx_irq = ret + 1; } - ret = platform_get_irq(platdev, 1); - if (ret > 0) - ourport->tx_irq = ret; + if (ourport->info->irq_cnt != 1) { + ret = platform_get_irq(platdev, 1); + if (ret > 0) + ourport->tx_irq = ret; + } /* * DMA is currently supported only on DT platforms, if DMA properties * are specified. @@ -2387,6 +2393,7 @@ static struct s3c24xx_serial_drv_data s3c2410_serial_drv_data = { .name = "Samsung S3C2410 UART", .type = PORT_S3C2410, .fifosize = 16, + .irq_cnt = 2, .rx_fifomask = S3C2410_UFSTAT_RXMASK, .rx_fifoshift = S3C2410_UFSTAT_RXSHIFT, .rx_fifofull = S3C2410_UFSTAT_RXFULL, @@ -2414,6 +2421,7 @@ static struct s3c24xx_serial_drv_data s3c2412_serial_drv_data = { .name = "Samsung S3C2412 UART", .type = PORT_S3C2412, .fifosize = 64, + .irq_cnt = 2, .has_divslot = 1, .rx_fifomask = S3C2440_UFSTAT_RXMASK, .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT, @@ -2443,6 +2451,7 @@ static struct s3c24xx_serial_drv_data s3c2440_serial_drv_data = { .name = "Samsung S3C2440 UART", .type = PORT_S3C2440, .fifosize = 64, + .irq_cnt = 2, .has_divslot = 1, .rx_fifomask = S3C2440_UFSTAT_RXMASK, .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT, @@ -2471,6 +2480,7 @@ static struct s3c24xx_serial_drv_data s3c6400_serial_drv_data = { .name = "Samsung S3C6400 UART", .type = PORT_S3C6400, .fifosize = 64, + .irq_cnt = 1, .has_divslot = 1, .rx_fifomask = S3C2440_UFSTAT_RXMASK, .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT, @@ -2498,6 +2508,7 @@ static struct s3c24xx_serial_drv_data s5pv210_serial_drv_data = { .info = &(struct s3c24xx_uart_info) { .name = "Samsung S5PV210 UART", .type = PORT_S3C6400, + .irq_cnt = 1, .has_divslot = 1, .rx_fifomask = S5PV210_UFSTAT_RXMASK, .rx_fifoshift = S5PV210_UFSTAT_RXSHIFT, @@ -2526,6 +2537,7 @@ static struct s3c24xx_serial_drv_data s5pv210_serial_drv_data = { .info = &(struct s3c24xx_uart_info) { \ .name = "Samsung Exynos UART", \ .type = PORT_S3C6400, \ + .irq_cnt = 1, \ .has_divslot = 1, \ .rx_fifomask = S5PV210_UFSTAT_RXMASK, \ .rx_fifoshift = S5PV210_UFSTAT_RXSHIFT, \ -- 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: [RFC PATCH] serial: samsung: Re-factors UART IRQ resource for various Samsung SoC Date: Mon, 15 Jun 2020 17:56:09 +0530 [thread overview] Message-ID: <20200615122609.71884-1-m.shams@samsung.com> (raw) In-Reply-To: CGME20200615124355epcas5p446ae2f1b63331ef87334cd7d696c3c43@epcas5p4.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> --- drivers/tty/serial/samsung_tty.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c index 6ef614d8648c..078dcb3e316f 100644 --- a/drivers/tty/serial/samsung_tty.c +++ b/drivers/tty/serial/samsung_tty.c @@ -60,6 +60,7 @@ struct s3c24xx_uart_info { char *name; unsigned int type; unsigned int fifosize; + unsigned int irq_cnt; unsigned long rx_fifomask; unsigned long rx_fifoshift; unsigned long rx_fifofull; @@ -1908,12 +1909,17 @@ 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 (ourport->info->irq_cnt == 1) + ourport->tx_irq = ret; + else + ourport->tx_irq = ret + 1; } - ret = platform_get_irq(platdev, 1); - if (ret > 0) - ourport->tx_irq = ret; + if (ourport->info->irq_cnt != 1) { + ret = platform_get_irq(platdev, 1); + if (ret > 0) + ourport->tx_irq = ret; + } /* * DMA is currently supported only on DT platforms, if DMA properties * are specified. @@ -2387,6 +2393,7 @@ static struct s3c24xx_serial_drv_data s3c2410_serial_drv_data = { .name = "Samsung S3C2410 UART", .type = PORT_S3C2410, .fifosize = 16, + .irq_cnt = 2, .rx_fifomask = S3C2410_UFSTAT_RXMASK, .rx_fifoshift = S3C2410_UFSTAT_RXSHIFT, .rx_fifofull = S3C2410_UFSTAT_RXFULL, @@ -2414,6 +2421,7 @@ static struct s3c24xx_serial_drv_data s3c2412_serial_drv_data = { .name = "Samsung S3C2412 UART", .type = PORT_S3C2412, .fifosize = 64, + .irq_cnt = 2, .has_divslot = 1, .rx_fifomask = S3C2440_UFSTAT_RXMASK, .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT, @@ -2443,6 +2451,7 @@ static struct s3c24xx_serial_drv_data s3c2440_serial_drv_data = { .name = "Samsung S3C2440 UART", .type = PORT_S3C2440, .fifosize = 64, + .irq_cnt = 2, .has_divslot = 1, .rx_fifomask = S3C2440_UFSTAT_RXMASK, .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT, @@ -2471,6 +2480,7 @@ static struct s3c24xx_serial_drv_data s3c6400_serial_drv_data = { .name = "Samsung S3C6400 UART", .type = PORT_S3C6400, .fifosize = 64, + .irq_cnt = 1, .has_divslot = 1, .rx_fifomask = S3C2440_UFSTAT_RXMASK, .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT, @@ -2498,6 +2508,7 @@ static struct s3c24xx_serial_drv_data s5pv210_serial_drv_data = { .info = &(struct s3c24xx_uart_info) { .name = "Samsung S5PV210 UART", .type = PORT_S3C6400, + .irq_cnt = 1, .has_divslot = 1, .rx_fifomask = S5PV210_UFSTAT_RXMASK, .rx_fifoshift = S5PV210_UFSTAT_RXSHIFT, @@ -2526,6 +2537,7 @@ static struct s3c24xx_serial_drv_data s5pv210_serial_drv_data = { .info = &(struct s3c24xx_uart_info) { \ .name = "Samsung Exynos UART", \ .type = PORT_S3C6400, \ + .irq_cnt = 1, \ .has_divslot = 1, \ .rx_fifomask = S5PV210_UFSTAT_RXMASK, \ .rx_fifoshift = S5PV210_UFSTAT_RXSHIFT, \ -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next parent reply other threads:[~2020-06-15 12:44 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <CGME20200615124355epcas5p446ae2f1b63331ef87334cd7d696c3c43@epcas5p4.samsung.com> 2020-06-15 12:26 ` Tamseel Shams [this message] 2020-06-15 12:26 ` [RFC PATCH] serial: samsung: Re-factors UART IRQ resource for various Samsung SoC Tamseel Shams 2020-06-15 12:50 ` Greg KH 2020-06-15 12:50 ` Greg KH 2020-06-17 16:28 ` M Tamseel Shams 2020-06-17 16:28 ` M Tamseel Shams 2020-06-15 13:13 ` Robin Murphy 2020-06-15 13:13 ` Robin Murphy 2020-06-17 17:08 ` M Tamseel Shams 2020-06-17 17:08 ` M Tamseel Shams
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