[PATCH 0/6] tty cleanup for 6.19 or later

[PATCH 0/6] tty cleanup for 6.19 or later

[Jiri Slaby (SUSE)]

Hi,

this is another couple of random cleanup patches over the tty drivers.

Jiri Slaby (SUSE) (6):
  tty: vt: do not open code DIV_ROUND_UP()
  serial: xilinx_uartps: drop cdns_uart::cdns_uart_driver
  serial: drop SERIAL_8250_DEPRECATED_OPTIONS
  serial: 8250: move skip_txen_test to core
  serial: 8250: make share_irqs local to 8250_platform
  serial: 8250_platform: simplify IRQF_SHARED handling

 arch/arm/configs/aspeed_g4_defconfig        |  1 -
 arch/arm/configs/aspeed_g5_defconfig        |  1 -
 arch/arm/configs/hisi_defconfig             |  1 -
 arch/arm/configs/lpc18xx_defconfig          |  1 -
 arch/arm/configs/shmobile_defconfig         |  1 -
 arch/mips/configs/bcm47xx_defconfig         |  1 -
 arch/mips/configs/bmips_stb_defconfig       |  1 -
 arch/mips/configs/gcw0_defconfig            |  1 -
 arch/nios2/configs/10m50_defconfig          |  1 -
 arch/parisc/configs/generic-32bit_defconfig |  1 -
 arch/parisc/configs/generic-64bit_defconfig |  1 -
 arch/powerpc/configs/44x/akebono_defconfig  |  1 -
 arch/powerpc/configs/microwatt_defconfig    |  1 -
 arch/riscv/configs/nommu_virt_defconfig     |  1 -
 arch/xtensa/configs/audio_kc705_defconfig   |  1 -
 arch/xtensa/configs/generic_kc705_defconfig |  1 -
 arch/xtensa/configs/nommu_kc705_defconfig   |  1 -
 arch/xtensa/configs/smp_lx200_defconfig     |  1 -
 arch/xtensa/configs/xip_kc705_defconfig     |  1 -
 drivers/tty/serial/8250/8250.h              |  9 ----
 drivers/tty/serial/8250/8250_core.c         |  4 ++
 drivers/tty/serial/8250/8250_platform.c     | 55 +++++----------------
 drivers/tty/serial/8250/8250_rsa.c          | 24 ---------
 drivers/tty/serial/8250/Kconfig             | 17 -------
 drivers/tty/serial/xilinx_uartps.c          | 15 ++----
 drivers/tty/vt/vt.c                         |  4 +-
 26 files changed, 22 insertions(+), 125 deletions(-)

-- 
2.51.1

[PATCH 1/6] tty: vt: do not open code DIV_ROUND_UP()

[Jiri Slaby (SUSE)]

Use the designated DIV_ROUND_UP() macro instead of explicit addition
with division.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
---
 drivers/tty/vt/vt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 6e0089b85c27..59b4b5e126ba 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -4862,7 +4862,7 @@ static int con_font_get(struct vc_data *vc, struct console_font_op *op)
 			return ret;
 	}
 
-	c = (font.width+7)/8 * vpitch * font.charcount;
+	c = DIV_ROUND_UP(font.width, 8) * vpitch * font.charcount;
 
 	if (op->data && font.charcount > op->charcount)
 		return -ENOSPC;
@@ -4894,7 +4894,7 @@ static int con_font_set(struct vc_data *vc, const struct console_font_op *op)
 		return -EINVAL;
 	if (vpitch < op->height)
 		return -EINVAL;
-	size = (op->width+7)/8 * vpitch * op->charcount;
+	size = DIV_ROUND_UP(op->width, 8) * vpitch * op->charcount;
 	if (size > max_font_size)
 		return -ENOSPC;
 
-- 
2.51.1

[PATCH 2/6] serial: xilinx_uartps: drop cdns_uart::cdns_uart_driver

[Jiri Slaby (SUSE)]

Provided the uart driver is available globally, there is no need to
store a pointer to it in struct cdns_uart. Instead, use the global
cdns_uart_uart_driver in the code directly.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
---
Cc: Michal Simek <michal.simek@amd.com>
Cc: linux-arm-kernel@lists.infradead.org
---
 drivers/tty/serial/xilinx_uartps.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index a66b44d21fba..c793fc74c26b 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -190,7 +190,6 @@ MODULE_PARM_DESC(rx_timeout, "Rx timeout, 1-255");
  * @port:		Pointer to the UART port
  * @uartclk:		Reference clock
  * @pclk:		APB clock
- * @cdns_uart_driver:	Pointer to UART driver
  * @baud:		Current baud rate
  * @clk_rate_change_nb:	Notifier block for clock changes
  * @quirks:		Flags for RXBS support.
@@ -204,7 +203,6 @@ struct cdns_uart {
 	struct uart_port	*port;
 	struct clk		*uartclk;
 	struct clk		*pclk;
-	struct uart_driver	*cdns_uart_driver;
 	unsigned int		baud;
 	struct notifier_block	clk_rate_change_nb;
 	u32			quirks;
@@ -1465,7 +1463,6 @@ static struct console cdns_uart_console = {
 static int cdns_uart_suspend(struct device *device)
 {
 	struct uart_port *port = dev_get_drvdata(device);
-	struct cdns_uart *cdns_uart = port->private_data;
 	int may_wake;
 
 	may_wake = device_may_wakeup(device);
@@ -1489,7 +1486,7 @@ static int cdns_uart_suspend(struct device *device)
 	 * Call the API provided in serial_core.c file which handles
 	 * the suspend.
 	 */
-	return uart_suspend_port(cdns_uart->cdns_uart_driver, port);
+	return uart_suspend_port(&cdns_uart_uart_driver, port);
 }
 
 /**
@@ -1550,7 +1547,7 @@ static int cdns_uart_resume(struct device *device)
 		uart_port_unlock_irqrestore(port, flags);
 	}
 
-	return uart_resume_port(cdns_uart->cdns_uart_driver, port);
+	return uart_resume_port(&cdns_uart_uart_driver, port);
 }
 #endif /* ! CONFIG_PM_SLEEP */
 static int __maybe_unused cdns_runtime_suspend(struct device *dev)
@@ -1686,8 +1683,6 @@ static int cdns_uart_probe(struct platform_device *pdev)
 		}
 	}
 
-	cdns_uart_data->cdns_uart_driver = &cdns_uart_uart_driver;
-
 	match = of_match_node(cdns_uart_of_match, pdev->dev.of_node);
 	if (match && match->data) {
 		const struct cdns_platform_data *data = match->data;
@@ -1862,7 +1857,7 @@ static int cdns_uart_probe(struct platform_device *pdev)
 	clk_disable_unprepare(cdns_uart_data->pclk);
 err_out_unregister_driver:
 	if (!instances)
-		uart_unregister_driver(cdns_uart_data->cdns_uart_driver);
+		uart_unregister_driver(&cdns_uart_uart_driver);
 	return rc;
 }
 
@@ -1880,7 +1875,7 @@ static void cdns_uart_remove(struct platform_device *pdev)
 	clk_notifier_unregister(cdns_uart_data->uartclk,
 			&cdns_uart_data->clk_rate_change_nb);
 #endif
-	uart_remove_one_port(cdns_uart_data->cdns_uart_driver, port);
+	uart_remove_one_port(&cdns_uart_uart_driver, port);
 	port->mapbase = 0;
 	clk_disable_unprepare(cdns_uart_data->uartclk);
 	clk_disable_unprepare(cdns_uart_data->pclk);
@@ -1896,7 +1891,7 @@ static void cdns_uart_remove(struct platform_device *pdev)
 	reset_control_assert(cdns_uart_data->rstc);
 
 	if (!--instances)
-		uart_unregister_driver(cdns_uart_data->cdns_uart_driver);
+		uart_unregister_driver(&cdns_uart_uart_driver);
 }
 
 static struct platform_driver cdns_uart_platform_driver = {
-- 
2.51.1

[PATCH 3/6] serial: drop SERIAL_8250_DEPRECATED_OPTIONS

[Jiri Slaby (SUSE)]

In 3.7, 8250 was unintentionally renamed to 8250_core. This happened in
the commit 835d844d1a28 (8250_pnp: do pnp probe before legacy probe).
This made 8250.<xxxx> module options effectively defunct. Instead,
8250_core.<xxxx> worked.

In 3.9, the commit f2b8dfd9e480 (serial: 8250: Keep 8250.<xxxx> module
options functional after driver rename) made the original options work
again by introducing a hack.

Later in 3.9, the commit 9196d8acd7f9 (TTY: 8250, revert module name
change) changed the module name back to 8250 (from 8250_core). Since
then, the hack was there to support the transient 8250_core.<xxxx>
options. Those were present only in the 3.7..3.9 range.

These transient options were deprecated by 9326b047e4fd (TTY: 8250,
deprecated 8250_core.* options) in v3.9 too.

Now, after those 12 years, it is time to get rid of this hack
completely.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
---
 arch/arm/configs/aspeed_g4_defconfig        |  1 -
 arch/arm/configs/aspeed_g5_defconfig        |  1 -
 arch/arm/configs/hisi_defconfig             |  1 -
 arch/arm/configs/lpc18xx_defconfig          |  1 -
 arch/arm/configs/shmobile_defconfig         |  1 -
 arch/mips/configs/bcm47xx_defconfig         |  1 -
 arch/mips/configs/bmips_stb_defconfig       |  1 -
 arch/mips/configs/gcw0_defconfig            |  1 -
 arch/nios2/configs/10m50_defconfig          |  1 -
 arch/parisc/configs/generic-32bit_defconfig |  1 -
 arch/parisc/configs/generic-64bit_defconfig |  1 -
 arch/powerpc/configs/44x/akebono_defconfig  |  1 -
 arch/powerpc/configs/microwatt_defconfig    |  1 -
 arch/riscv/configs/nommu_virt_defconfig     |  1 -
 arch/xtensa/configs/audio_kc705_defconfig   |  1 -
 arch/xtensa/configs/generic_kc705_defconfig |  1 -
 arch/xtensa/configs/nommu_kc705_defconfig   |  1 -
 arch/xtensa/configs/smp_lx200_defconfig     |  1 -
 arch/xtensa/configs/xip_kc705_defconfig     |  1 -
 drivers/tty/serial/8250/8250_platform.c     | 27 ---------------------
 drivers/tty/serial/8250/8250_rsa.c          | 24 ------------------
 drivers/tty/serial/8250/Kconfig             | 17 -------------
 22 files changed, 87 deletions(-)

diff --git a/arch/arm/configs/aspeed_g4_defconfig b/arch/arm/configs/aspeed_g4_defconfig
index 28b724d59e7e..45d8738abb75 100644
--- a/arch/arm/configs/aspeed_g4_defconfig
+++ b/arch/arm/configs/aspeed_g4_defconfig
@@ -117,7 +117,6 @@ CONFIG_KEYBOARD_GPIO_POLLED=y
 # CONFIG_VT is not set
 # CONFIG_LEGACY_PTYS is not set
 CONFIG_SERIAL_8250=y
-# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_NR_UARTS=6
 CONFIG_SERIAL_8250_RUNTIME_UARTS=6
diff --git a/arch/arm/configs/aspeed_g5_defconfig b/arch/arm/configs/aspeed_g5_defconfig
index c3b0d5f06889..2e6ea13c1e9b 100644
--- a/arch/arm/configs/aspeed_g5_defconfig
+++ b/arch/arm/configs/aspeed_g5_defconfig
@@ -138,7 +138,6 @@ CONFIG_SERIO_RAW=y
 # CONFIG_VT is not set
 # CONFIG_LEGACY_PTYS is not set
 CONFIG_SERIAL_8250=y
-# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_NR_UARTS=6
 CONFIG_SERIAL_8250_RUNTIME_UARTS=6
diff --git a/arch/arm/configs/hisi_defconfig b/arch/arm/configs/hisi_defconfig
index e19c1039fb93..384aade1a48b 100644
--- a/arch/arm/configs/hisi_defconfig
+++ b/arch/arm/configs/hisi_defconfig
@@ -35,7 +35,6 @@ CONFIG_NETDEVICES=y
 CONFIG_HIX5HD2_GMAC=y
 CONFIG_HIP04_ETH=y
 CONFIG_SERIAL_8250=y
-CONFIG_SERIAL_8250_DEPRECATED_OPTIONS=y
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_NR_UARTS=2
 CONFIG_SERIAL_8250_RUNTIME_UARTS=2
diff --git a/arch/arm/configs/lpc18xx_defconfig b/arch/arm/configs/lpc18xx_defconfig
index 2d489186e945..f142a6637ede 100644
--- a/arch/arm/configs/lpc18xx_defconfig
+++ b/arch/arm/configs/lpc18xx_defconfig
@@ -90,7 +90,6 @@ CONFIG_KEYBOARD_GPIO_POLLED=y
 # CONFIG_UNIX98_PTYS is not set
 # CONFIG_LEGACY_PTYS is not set
 CONFIG_SERIAL_8250=y
-# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_OF_PLATFORM=y
 CONFIG_SERIAL_NONSTANDARD=y
diff --git a/arch/arm/configs/shmobile_defconfig b/arch/arm/configs/shmobile_defconfig
index c1fd469e2071..0085921833c3 100644
--- a/arch/arm/configs/shmobile_defconfig
+++ b/arch/arm/configs/shmobile_defconfig
@@ -75,7 +75,6 @@ CONFIG_INPUT_DA9063_ONKEY=y
 CONFIG_INPUT_ADXL34X=y
 # CONFIG_LEGACY_PTYS is not set
 CONFIG_SERIAL_8250=y
-# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 # CONFIG_SERIAL_8250_16550A_VARIANTS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 # CONFIG_SERIAL_8250_PCI is not set
diff --git a/arch/mips/configs/bcm47xx_defconfig b/arch/mips/configs/bcm47xx_defconfig
index f56e8db5da95..d10b3d4adbd1 100644
--- a/arch/mips/configs/bcm47xx_defconfig
+++ b/arch/mips/configs/bcm47xx_defconfig
@@ -51,7 +51,6 @@ CONFIG_B43LEGACY=y
 CONFIG_BRCMSMAC=y
 CONFIG_ISDN=y
 CONFIG_SERIAL_8250=y
-# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 # CONFIG_SERIAL_8250_PCI is not set
 CONFIG_SERIAL_8250_NR_UARTS=2
diff --git a/arch/mips/configs/bmips_stb_defconfig b/arch/mips/configs/bmips_stb_defconfig
index cd0dc37c3d84..ecfa7f777efa 100644
--- a/arch/mips/configs/bmips_stb_defconfig
+++ b/arch/mips/configs/bmips_stb_defconfig
@@ -119,7 +119,6 @@ CONFIG_INPUT_UINPUT=y
 CONFIG_VT=y
 CONFIG_VT_HW_CONSOLE_BINDING=y
 CONFIG_SERIAL_8250=y
-# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_OF_PLATFORM=y
 # CONFIG_HW_RANDOM is not set
diff --git a/arch/mips/configs/gcw0_defconfig b/arch/mips/configs/gcw0_defconfig
index 8b7ad877e07a..fda9971bdd8d 100644
--- a/arch/mips/configs/gcw0_defconfig
+++ b/arch/mips/configs/gcw0_defconfig
@@ -52,7 +52,6 @@ CONFIG_INPUT_UINPUT=y
 CONFIG_INPUT_PWM_VIBRA=y
 # CONFIG_SERIO is not set
 CONFIG_SERIAL_8250=y
-# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_INGENIC=y
 CONFIG_HW_RANDOM=y
diff --git a/arch/nios2/configs/10m50_defconfig b/arch/nios2/configs/10m50_defconfig
index 048f74e0dc6d..b7224f44d327 100644
--- a/arch/nios2/configs/10m50_defconfig
+++ b/arch/nios2/configs/10m50_defconfig
@@ -51,7 +51,6 @@ CONFIG_MARVELL_PHY=y
 # CONFIG_SERIO_SERPORT is not set
 # CONFIG_VT is not set
 CONFIG_SERIAL_8250=y
-# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_OF_PLATFORM=y
 CONFIG_SERIAL_ALTERA_JTAGUART=y
diff --git a/arch/parisc/configs/generic-32bit_defconfig b/arch/parisc/configs/generic-32bit_defconfig
index 52031bde9f17..5444ce6405f3 100644
--- a/arch/parisc/configs/generic-32bit_defconfig
+++ b/arch/parisc/configs/generic-32bit_defconfig
@@ -119,7 +119,6 @@ CONFIG_INPUT_MISC=y
 CONFIG_INPUT_UINPUT=m
 CONFIG_LEGACY_PTY_COUNT=64
 CONFIG_SERIAL_8250=y
-# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_NR_UARTS=8
 CONFIG_SERIAL_8250_EXTENDED=y
diff --git a/arch/parisc/configs/generic-64bit_defconfig b/arch/parisc/configs/generic-64bit_defconfig
index 1aec04c09d0b..ce91f9d1fdbf 100644
--- a/arch/parisc/configs/generic-64bit_defconfig
+++ b/arch/parisc/configs/generic-64bit_defconfig
@@ -158,7 +158,6 @@ CONFIG_SERIO_SERPORT=m
 CONFIG_SERIO_RAW=m
 # CONFIG_LEGACY_PTYS is not set
 CONFIG_SERIAL_8250=y
-# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_NR_UARTS=8
 CONFIG_SERIAL_8250_RUNTIME_UARTS=8
diff --git a/arch/powerpc/configs/44x/akebono_defconfig b/arch/powerpc/configs/44x/akebono_defconfig
index 1882eb2da354..02e88648a2e6 100644
--- a/arch/powerpc/configs/44x/akebono_defconfig
+++ b/arch/powerpc/configs/44x/akebono_defconfig
@@ -85,7 +85,6 @@ CONFIG_IBM_EMAC=y
 # CONFIG_SERIO is not set
 # CONFIG_VT is not set
 CONFIG_SERIAL_8250=y
-# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_EXTENDED=y
 CONFIG_SERIAL_8250_SHARE_IRQ=y
diff --git a/arch/powerpc/configs/microwatt_defconfig b/arch/powerpc/configs/microwatt_defconfig
index a64fb1ef8c75..d81989a6f59b 100644
--- a/arch/powerpc/configs/microwatt_defconfig
+++ b/arch/powerpc/configs/microwatt_defconfig
@@ -62,7 +62,6 @@ CONFIG_LITEX_LITEETH=y
 # CONFIG_VT is not set
 # CONFIG_LEGACY_PTYS is not set
 CONFIG_SERIAL_8250=y
-# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_OF_PLATFORM=y
 CONFIG_SERIAL_NONSTANDARD=y
diff --git a/arch/riscv/configs/nommu_virt_defconfig b/arch/riscv/configs/nommu_virt_defconfig
index d4b03dc3c2c0..0da5069bfbef 100644
--- a/arch/riscv/configs/nommu_virt_defconfig
+++ b/arch/riscv/configs/nommu_virt_defconfig
@@ -48,7 +48,6 @@ CONFIG_VIRTIO_BLK=y
 # CONFIG_LEGACY_PTYS is not set
 # CONFIG_LDISC_AUTOLOAD is not set
 CONFIG_SERIAL_8250=y
-# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_NR_UARTS=1
 CONFIG_SERIAL_8250_RUNTIME_UARTS=1
diff --git a/arch/xtensa/configs/audio_kc705_defconfig b/arch/xtensa/configs/audio_kc705_defconfig
index dc942bbac69f..7b3f234b337c 100644
--- a/arch/xtensa/configs/audio_kc705_defconfig
+++ b/arch/xtensa/configs/audio_kc705_defconfig
@@ -81,7 +81,6 @@ CONFIG_MARVELL_PHY=y
 # CONFIG_INPUT_MOUSE is not set
 # CONFIG_SERIO is not set
 CONFIG_SERIAL_8250=y
-# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_OF_PLATFORM=y
 CONFIG_HW_RANDOM=y
diff --git a/arch/xtensa/configs/generic_kc705_defconfig b/arch/xtensa/configs/generic_kc705_defconfig
index 3ee7e1c56556..c1b766a77a1e 100644
--- a/arch/xtensa/configs/generic_kc705_defconfig
+++ b/arch/xtensa/configs/generic_kc705_defconfig
@@ -79,7 +79,6 @@ CONFIG_MARVELL_PHY=y
 # CONFIG_INPUT_MOUSE is not set
 # CONFIG_SERIO is not set
 CONFIG_SERIAL_8250=y
-# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_OF_PLATFORM=y
 CONFIG_HW_RANDOM=y
diff --git a/arch/xtensa/configs/nommu_kc705_defconfig b/arch/xtensa/configs/nommu_kc705_defconfig
index c6e96f0aa700..27b126d4e7bf 100644
--- a/arch/xtensa/configs/nommu_kc705_defconfig
+++ b/arch/xtensa/configs/nommu_kc705_defconfig
@@ -81,7 +81,6 @@ CONFIG_MARVELL_PHY=y
 # CONFIG_INPUT_MOUSE is not set
 # CONFIG_SERIO is not set
 CONFIG_SERIAL_8250=y
-# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_OF_PLATFORM=y
 CONFIG_HW_RANDOM=y
diff --git a/arch/xtensa/configs/smp_lx200_defconfig b/arch/xtensa/configs/smp_lx200_defconfig
index 373d42b9e510..dfb3d921b850 100644
--- a/arch/xtensa/configs/smp_lx200_defconfig
+++ b/arch/xtensa/configs/smp_lx200_defconfig
@@ -83,7 +83,6 @@ CONFIG_MARVELL_PHY=y
 # CONFIG_INPUT_MOUSE is not set
 # CONFIG_SERIO is not set
 CONFIG_SERIAL_8250=y
-# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_OF_PLATFORM=y
 CONFIG_HW_RANDOM=y
diff --git a/arch/xtensa/configs/xip_kc705_defconfig b/arch/xtensa/configs/xip_kc705_defconfig
index 5d6013ea70fc..472568b85fb9 100644
--- a/arch/xtensa/configs/xip_kc705_defconfig
+++ b/arch/xtensa/configs/xip_kc705_defconfig
@@ -72,7 +72,6 @@ CONFIG_MARVELL_PHY=y
 # CONFIG_INPUT_MOUSE is not set
 # CONFIG_SERIO is not set
 CONFIG_SERIAL_8250=y
-# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_OF_PLATFORM=y
 # CONFIG_HWMON is not set
diff --git a/drivers/tty/serial/8250/8250_platform.c b/drivers/tty/serial/8250/8250_platform.c
index b27981340e76..38b158ec4725 100644
--- a/drivers/tty/serial/8250/8250_platform.c
+++ b/drivers/tty/serial/8250/8250_platform.c
@@ -390,30 +390,3 @@ module_param(skip_txen_test, uint, 0644);
 MODULE_PARM_DESC(skip_txen_test, "Skip checking for the TXEN bug at init time");
 
 MODULE_ALIAS_CHARDEV_MAJOR(TTY_MAJOR);
-
-#ifdef CONFIG_SERIAL_8250_DEPRECATED_OPTIONS
-#ifndef MODULE
-/*
- * This module was renamed to 8250_core in 3.7. Keep the old "8250" name
- * working as well for the module options so we don't break people. We
- * need to keep the names identical and the convenient macros will happily
- * refuse to let us do that by failing the build with redefinition errors
- * of global variables. So we stick them inside a dummy function to avoid
- * those conflicts. The options still get parsed, and the redefined
- * MODULE_PARAM_PREFIX lets us keep the "8250." syntax alive.
- *
- * This is hacky.  I'm sorry.
- */
-static void __used s8250_options(void)
-{
-#undef MODULE_PARAM_PREFIX
-#define MODULE_PARAM_PREFIX "8250_core."
-
-	module_param_cb(share_irqs, &param_ops_uint, &share_irqs, 0644);
-	module_param_cb(nr_uarts, &param_ops_uint, &nr_uarts, 0644);
-	module_param_cb(skip_txen_test, &param_ops_uint, &skip_txen_test, 0644);
-}
-#else
-MODULE_ALIAS("8250_core");
-#endif
-#endif
diff --git a/drivers/tty/serial/8250/8250_rsa.c b/drivers/tty/serial/8250/8250_rsa.c
index 40a3dbd9e452..3b9c00515407 100644
--- a/drivers/tty/serial/8250/8250_rsa.c
+++ b/drivers/tty/serial/8250/8250_rsa.c
@@ -201,27 +201,3 @@ void rsa_reset(struct uart_8250_port *up)
 	serial_out(up, UART_RSA_FRR, 0);
 }
 EXPORT_SYMBOL_FOR_MODULES(rsa_reset, "8250_base");
-
-#ifdef CONFIG_SERIAL_8250_DEPRECATED_OPTIONS
-#ifndef MODULE
-/*
- * Keep the old "8250" name working as well for the module options so we don't
- * break people. We need to keep the names identical and the convenient macros
- * will happily refuse to let us do that by failing the build with redefinition
- * errors of global variables.  So we stick them inside a dummy function to
- * avoid those conflicts.  The options still get parsed, and the redefined
- * MODULE_PARAM_PREFIX lets us keep the "8250." syntax alive.
- *
- * This is hacky. I'm sorry.
- */
-static void __used rsa8250_options(void)
-{
-#undef MODULE_PARAM_PREFIX
-#define MODULE_PARAM_PREFIX "8250_core."
-
-	__module_param_call(MODULE_PARAM_PREFIX, probe_rsa,
-		&param_array_ops, .arr = &__param_arr_probe_rsa,
-		0444, -1, 0);
-}
-#endif
-#endif
diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index f64ef0819cd4..58f0142a59ff 100644
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -34,23 +34,6 @@ config SERIAL_8250
 	  Most people will say Y or M here, so that they can use serial mice,
 	  modems and similar devices connecting to the standard serial ports.
 
-config SERIAL_8250_DEPRECATED_OPTIONS
-	bool "Support 8250_core.* kernel options (DEPRECATED)"
-	depends on SERIAL_8250
-	default y
-	help
-	  In 3.7 we renamed 8250 to 8250_core by mistake, so now we have to
-	  accept kernel parameters in both forms like 8250_core.nr_uarts=4 and
-	  8250.nr_uarts=4. We now renamed the module back to 8250, but if
-	  anybody noticed in 3.7 and changed their userspace we still have to
-	  keep the 8250_core.* options around until they revert the changes
-	  they already did.
-
-	  If 8250 is built as a module, this adds 8250_core alias instead. 
-
-	  If you did not notice yet and/or you have userspace from pre-3.7, it
-	  is safe (and recommended) to say N here.
-
 config SERIAL_8250_PNP
 	bool "8250/16550 PNP device support" if EXPERT
 	depends on SERIAL_8250 && PNP
-- 
2.51.1

[PATCH 4/6] serial: 8250: move skip_txen_test to core

[Jiri Slaby (SUSE)]

8250_core is the only place where skip_txen_test is used. And platform
and core end up in 8250.ko, so there is no change in module name (param
prefix). Therefore, move skip_txen_test there and make it local.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
---
 drivers/tty/serial/8250/8250.h          | 1 -
 drivers/tty/serial/8250/8250_core.c     | 4 ++++
 drivers/tty/serial/8250/8250_platform.c | 5 -----
 3 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h
index 58e64c4e1e3a..d8a726b355d5 100644
--- a/drivers/tty/serial/8250/8250.h
+++ b/drivers/tty/serial/8250/8250.h
@@ -105,7 +105,6 @@ extern unsigned int nr_uarts;
 #endif
 
 extern unsigned int share_irqs;
-extern unsigned int skip_txen_test;
 
 #define SERIAL8250_PORT_FLAGS(_base, _irq, _flags)		\
 	{							\
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index bfa421ab3253..0e81f78c6063 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -52,6 +52,10 @@ struct irq_info {
 static DEFINE_HASHTABLE(irq_lists, IRQ_HASH_BITS);
 static DEFINE_MUTEX(hash_mutex);	/* Used to walk the hash */
 
+static bool skip_txen_test;
+module_param(skip_txen_test, bool, 0644);
+MODULE_PARM_DESC(skip_txen_test, "Skip checking for the TXEN bug at init time");
+
 /*
  * This is the serial driver's interrupt routine.
  *
diff --git a/drivers/tty/serial/8250/8250_platform.c b/drivers/tty/serial/8250/8250_platform.c
index 38b158ec4725..6f09416d4107 100644
--- a/drivers/tty/serial/8250/8250_platform.c
+++ b/drivers/tty/serial/8250/8250_platform.c
@@ -29,10 +29,8 @@
  * Configuration:
  * share_irqs:     Whether we pass IRQF_SHARED to request_irq().
  *                 This option is unsafe when used on edge-triggered interrupts.
- * skip_txen_test: Force skip of txen test at init time.
  */
 unsigned int share_irqs = SERIAL8250_SHARE_IRQS;
-unsigned int skip_txen_test;
 
 unsigned int nr_uarts = CONFIG_SERIAL_8250_RUNTIME_UARTS;
 
@@ -386,7 +384,4 @@ MODULE_PARM_DESC(share_irqs, "Share IRQs with other non-8250/16x50 devices (unsa
 module_param(nr_uarts, uint, 0644);
 MODULE_PARM_DESC(nr_uarts, "Maximum number of UARTs supported. (1-" __MODULE_STRING(CONFIG_SERIAL_8250_NR_UARTS) ")");
 
-module_param(skip_txen_test, uint, 0644);
-MODULE_PARM_DESC(skip_txen_test, "Skip checking for the TXEN bug at init time");
-
 MODULE_ALIAS_CHARDEV_MAJOR(TTY_MAJOR);
-- 
2.51.1

[PATCH 5/6] serial: 8250: make share_irqs local to 8250_platform

[Jiri Slaby (SUSE)]

share_irqs is used solely in 8250_platform. Make it local to that file.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
---
 drivers/tty/serial/8250/8250.h          | 8 --------
 drivers/tty/serial/8250/8250_platform.c | 4 ++--
 2 files changed, 2 insertions(+), 10 deletions(-)

diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h
index d8a726b355d5..3cd8614e6339 100644
--- a/drivers/tty/serial/8250/8250.h
+++ b/drivers/tty/serial/8250/8250.h
@@ -98,14 +98,6 @@ struct serial8250_config {
 
 extern unsigned int nr_uarts;
 
-#ifdef CONFIG_SERIAL_8250_SHARE_IRQ
-#define SERIAL8250_SHARE_IRQS 1
-#else
-#define SERIAL8250_SHARE_IRQS 0
-#endif
-
-extern unsigned int share_irqs;
-
 #define SERIAL8250_PORT_FLAGS(_base, _irq, _flags)		\
 	{							\
 		.iobase		= _base,			\
diff --git a/drivers/tty/serial/8250/8250_platform.c b/drivers/tty/serial/8250/8250_platform.c
index 6f09416d4107..4c1166a46a1f 100644
--- a/drivers/tty/serial/8250/8250_platform.c
+++ b/drivers/tty/serial/8250/8250_platform.c
@@ -30,7 +30,7 @@
  * share_irqs:     Whether we pass IRQF_SHARED to request_irq().
  *                 This option is unsafe when used on edge-triggered interrupts.
  */
-unsigned int share_irqs = SERIAL8250_SHARE_IRQS;
+static bool share_irqs = IS_ENABLED(CONFIG_SERIAL_8250_SHARE_IRQ);
 
 unsigned int nr_uarts = CONFIG_SERIAL_8250_RUNTIME_UARTS;
 
@@ -378,7 +378,7 @@ module_exit(serial8250_exit);
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Generic 8250/16x50 serial platform driver");
 
-module_param_hw(share_irqs, uint, other, 0644);
+module_param_hw(share_irqs, bool, other, 0644);
 MODULE_PARM_DESC(share_irqs, "Share IRQs with other non-8250/16x50 devices (unsafe)");
 
 module_param(nr_uarts, uint, 0644);
-- 
2.51.1

[PATCH 6/6] serial: 8250_platform: simplify IRQF_SHARED handling

[Jiri Slaby (SUSE)]

IRQF_SHARED is the only flag handled in __serial8250_isa_init_ports()
and serial8250_probe_platform(). There is no need to precompute the
flags. Instead, initialize port->irqflags directly in the for loop.

Note the "if (bool)" is cheap and these are not hot paths anyway.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
---
 drivers/tty/serial/8250/8250_platform.c | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_platform.c b/drivers/tty/serial/8250/8250_platform.c
index 4c1166a46a1f..af16a36193bf 100644
--- a/drivers/tty/serial/8250/8250_platform.c
+++ b/drivers/tty/serial/8250/8250_platform.c
@@ -58,7 +58,7 @@ EXPORT_SYMBOL(serial8250_set_isa_configurator);
 
 static void __init __serial8250_isa_init_ports(void)
 {
-	int i, irqflag = 0;
+	int i;
 
 	if (nr_uarts > UART_NR)
 		nr_uarts = UART_NR;
@@ -75,9 +75,6 @@ static void __init __serial8250_isa_init_ports(void)
 	univ8250_port_ops = *univ8250_port_base_ops;
 	univ8250_rsa_support(&univ8250_port_ops);
 
-	if (share_irqs)
-		irqflag = IRQF_SHARED;
-
 	for (i = 0; i < ARRAY_SIZE(old_serial_port) && i < nr_uarts; i++) {
 		struct uart_8250_port *up = serial8250_get_port(i);
 		struct uart_port *port = &up->port;
@@ -92,7 +89,9 @@ static void __init __serial8250_isa_init_ports(void)
 		port->iotype   = old_serial_port[i].io_type;
 		port->regshift = old_serial_port[i].iomem_reg_shift;
 
-		port->irqflags |= irqflag;
+		if (share_irqs)
+			port->irqflags |= IRQF_SHARED;
+
 		if (serial8250_isa_config != NULL)
 			serial8250_isa_config(i, &up->port, &up->capabilities);
 	}
@@ -155,15 +154,12 @@ static int serial8250_probe_acpi(struct platform_device *pdev)
 
 static int serial8250_probe_platform(struct platform_device *dev, struct plat_serial8250_port *p)
 {
-	int ret, i, irqflag = 0;
+	int ret, i;
 
 	struct uart_8250_port *uart __free(kfree) = kzalloc(sizeof(*uart), GFP_KERNEL);
 	if (!uart)
 		return -ENOMEM;
 
-	if (share_irqs)
-		irqflag = IRQF_SHARED;
-
 	for (i = 0; p && p->flags != 0; p++, i++) {
 		uart->port.iobase	= p->iobase;
 		uart->port.membase	= p->membase;
@@ -191,7 +187,10 @@ static int serial8250_probe_platform(struct platform_device *dev, struct plat_se
 		uart->port.get_mctrl	= p->get_mctrl;
 		uart->port.pm		= p->pm;
 		uart->port.dev		= &dev->dev;
-		uart->port.irqflags	|= irqflag;
+
+		if (share_irqs)
+			uart->port.irqflags |= IRQF_SHARED;
+
 		ret = serial8250_register_8250_port(uart);
 		if (ret < 0) {
 			dev_err(&dev->dev, "unable to register port at index %d "
-- 
2.51.1

Re: [PATCH 2/6] serial: xilinx_uartps: drop cdns_uart::cdns_uart_driver

[Michal Simek]

On 11/19/25 10:24, Jiri Slaby (SUSE) wrote:
> Provided the uart driver is available globally, there is no need to
> store a pointer to it in struct cdns_uart. Instead, use the global
> cdns_uart_uart_driver in the code directly.
> 
> Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
> ---
> Cc: Michal Simek <michal.simek@amd.com>
> Cc: linux-arm-kernel@lists.infradead.org
> ---
>   drivers/tty/serial/xilinx_uartps.c | 15 +++++----------
>   1 file changed, 5 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
> index a66b44d21fba..c793fc74c26b 100644
> --- a/drivers/tty/serial/xilinx_uartps.c
> +++ b/drivers/tty/serial/xilinx_uartps.c
> @@ -190,7 +190,6 @@ MODULE_PARM_DESC(rx_timeout, "Rx timeout, 1-255");
>    * @port:		Pointer to the UART port
>    * @uartclk:		Reference clock
>    * @pclk:		APB clock
> - * @cdns_uart_driver:	Pointer to UART driver
>    * @baud:		Current baud rate
>    * @clk_rate_change_nb:	Notifier block for clock changes
>    * @quirks:		Flags for RXBS support.
> @@ -204,7 +203,6 @@ struct cdns_uart {
>   	struct uart_port	*port;
>   	struct clk		*uartclk;
>   	struct clk		*pclk;
> -	struct uart_driver	*cdns_uart_driver;
>   	unsigned int		baud;
>   	struct notifier_block	clk_rate_change_nb;
>   	u32			quirks;
> @@ -1465,7 +1463,6 @@ static struct console cdns_uart_console = {
>   static int cdns_uart_suspend(struct device *device)
>   {
>   	struct uart_port *port = dev_get_drvdata(device);
> -	struct cdns_uart *cdns_uart = port->private_data;
>   	int may_wake;
>   
>   	may_wake = device_may_wakeup(device);
> @@ -1489,7 +1486,7 @@ static int cdns_uart_suspend(struct device *device)
>   	 * Call the API provided in serial_core.c file which handles
>   	 * the suspend.
>   	 */
> -	return uart_suspend_port(cdns_uart->cdns_uart_driver, port);
> +	return uart_suspend_port(&cdns_uart_uart_driver, port);
>   }
>   
>   /**
> @@ -1550,7 +1547,7 @@ static int cdns_uart_resume(struct device *device)
>   		uart_port_unlock_irqrestore(port, flags);
>   	}
>   
> -	return uart_resume_port(cdns_uart->cdns_uart_driver, port);
> +	return uart_resume_port(&cdns_uart_uart_driver, port);
>   }
>   #endif /* ! CONFIG_PM_SLEEP */
>   static int __maybe_unused cdns_runtime_suspend(struct device *dev)
> @@ -1686,8 +1683,6 @@ static int cdns_uart_probe(struct platform_device *pdev)
>   		}
>   	}
>   
> -	cdns_uart_data->cdns_uart_driver = &cdns_uart_uart_driver;
> -
>   	match = of_match_node(cdns_uart_of_match, pdev->dev.of_node);
>   	if (match && match->data) {
>   		const struct cdns_platform_data *data = match->data;
> @@ -1862,7 +1857,7 @@ static int cdns_uart_probe(struct platform_device *pdev)
>   	clk_disable_unprepare(cdns_uart_data->pclk);
>   err_out_unregister_driver:
>   	if (!instances)
> -		uart_unregister_driver(cdns_uart_data->cdns_uart_driver);
> +		uart_unregister_driver(&cdns_uart_uart_driver);
>   	return rc;
>   }
>   
> @@ -1880,7 +1875,7 @@ static void cdns_uart_remove(struct platform_device *pdev)
>   	clk_notifier_unregister(cdns_uart_data->uartclk,
>   			&cdns_uart_data->clk_rate_change_nb);
>   #endif
> -	uart_remove_one_port(cdns_uart_data->cdns_uart_driver, port);
> +	uart_remove_one_port(&cdns_uart_uart_driver, port);
>   	port->mapbase = 0;
>   	clk_disable_unprepare(cdns_uart_data->uartclk);
>   	clk_disable_unprepare(cdns_uart_data->pclk);
> @@ -1896,7 +1891,7 @@ static void cdns_uart_remove(struct platform_device *pdev)
>   	reset_control_assert(cdns_uart_data->rstc);
>   
>   	if (!--instances)
> -		uart_unregister_driver(cdns_uart_data->cdns_uart_driver);
> +		uart_unregister_driver(&cdns_uart_uart_driver);
>   }
>   
>   static struct platform_driver cdns_uart_platform_driver = {

Acked-by: Michal Simek <michal.simek@amd.com>

Thanks,
Michal