SERIAL: 8250: Remove SERIAL_8250_AU1X00

Remove the SERIAL_8250_AU1X00 config symbol.  Instead, use the MIPS_ALCHEMY
one which is always defined when building an Au1x00-based platform.

Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
To: Linux-MIPS <linux-mips@linux-mips.org>
Cc: Linux-serial <linux-serial@vger.kernel.org>
Patchwork: https://patchwork.linux-mips.org/patch/1461/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

This one depends on a previous patch (which removes SOC_AU1X00 and changes
MACH_ALCHEMY) to apply cleanly (and then actually work), so I'd love for
this to go in via the mips tree.

3 files changed, 3 insertions, 20 deletions

diff --git a/arch/mips/alchemy/common/platform.c b/arch/mips/alchemy/common/platform.c
index f9e5622ebc9..c233d64a0d6 100644
--- a/arch/mips/alchemy/common/platform.c
+++ b/arch/mips/alchemy/common/platform.c
@@ -33,7 +33,6 @@
         }
 
 static struct plat_serial8250_port au1x00_uart_data[] = {
-#if defined(CONFIG_SERIAL_8250_AU1X00)
 #if defined(CONFIG_SOC_AU1000)
         PORT(UART0_PHYS_ADDR, AU1000_UART0_INT),
         PORT(UART1_PHYS_ADDR, AU1000_UART1_INT),
@@ -54,7 +53,6 @@ static struct plat_serial8250_port au1x00_uart_data[] = {
         PORT(UART0_PHYS_ADDR, AU1200_UART0_INT),
         PORT(UART1_PHYS_ADDR, AU1200_UART1_INT),
 #endif
-#endif  /* CONFIG_SERIAL_8250_AU1X00 */
         { },
 };
 
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index 891e1dd65f2..09ef57034c9 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -302,7 +302,7 @@ static const struct serial8250_config uart_config[] = {
         },
 };
 
-#if defined (CONFIG_SERIAL_8250_AU1X00)
+#if defined(CONFIG_MIPS_ALCHEMY)
 
 /* Au1x00 UART hardware has a weird register layout */
 static const u8 au_io_in_map[] = {
@@ -422,7 +422,6 @@ static unsigned int mem32_serial_in(struct uart_port *p, int offset)
         return readl(p->membase + offset);
 }
 
-#ifdef CONFIG_SERIAL_8250_AU1X00
 static unsigned int au_serial_in(struct uart_port *p, int offset)
 {
         offset = map_8250_in_reg(p, offset) << p->regshift;
@@ -434,7 +433,6 @@ static void au_serial_out(struct uart_port *p, int offset, int value)
         offset = map_8250_out_reg(p, offset) << p->regshift;
         __raw_writel(value, p->membase + offset);
 }
-#endif
 
 static unsigned int tsi_serial_in(struct uart_port *p, int offset)
 {
@@ -503,12 +501,11 @@ static void set_io_from_upio(struct uart_port *p)
                 p->serial_out = mem32_serial_out;
                 break;
 
-#ifdef CONFIG_SERIAL_8250_AU1X00
         case UPIO_AU:
                 p->serial_in = au_serial_in;
                 p->serial_out = au_serial_out;
                 break;
-#endif
+
         case UPIO_TSI:
                 p->serial_in = tsi_serial_in;
                 p->serial_out = tsi_serial_out;
@@ -535,9 +532,7 @@ serial_out_sync(struct uart_8250_port *up, int offset, int value)
         switch (p->iotype) {
         case UPIO_MEM:
         case UPIO_MEM32:
-#ifdef CONFIG_SERIAL_8250_AU1X00
         case UPIO_AU:
-#endif
         case UPIO_DWAPB:
                 p->serial_out(p, offset, value);
                 p->serial_in(p, UART_LCR);      /* safe, no side-effects */
@@ -573,7 +568,7 @@ static inline void _serial_dl_write(struct uart_8250_port *up, int value)
         serial_outp(up, UART_DLM, value >> 8 & 0xff);
 }
 
-#if defined(CONFIG_SERIAL_8250_AU1X00)
+#if defined(CONFIG_MIPS_ALCHEMY)
 /* Au1x00 haven't got a standard divisor latch */
 static int serial_dl_read(struct uart_8250_port *up)
 {
@@ -2596,11 +2591,9 @@ static void serial8250_config_port(struct uart_port *port, int flags)
         if (flags & UART_CONFIG_TYPE)
                 autoconfig(up, probeflags);
 
-#ifdef CONFIG_SERIAL_8250_AU1X00
         /* if access method is AU, it is a 16550 with a quirk */
         if (up->port.type == PORT_16550A && up->port.iotype == UPIO_AU)
                 up->bugs |= UART_BUG_NOMSR;
-#endif
 
         if (up->port.type != PORT_UNKNOWN && flags & UART_CONFIG_IRQ)
                 autoconfig_irq(up);
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 1acc7b3c437..e437ce8c174 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -258,14 +258,6 @@ config SERIAL_8250_ACORN
           system, say Y to this option.  The driver can handle 1, 2, or 3 port
           cards.  If unsure, say N.
 
-config SERIAL_8250_AU1X00
-        bool "Au1x00 serial port support"
-        depends on SERIAL_8250 != n && MIPS_ALCHEMY
-        help
-          If you have an Au1x00 SOC based board and want to use the serial port,
-          say Y to this option. The driver can handle up to 4 serial ports,
-          depending on the SOC. If unsure, say N.
-
 config SERIAL_8250_RM9K
         bool "Support for MIPS RM9xxx integrated serial port"
         depends on SERIAL_8250 != n && SERIAL_RM9000