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author | Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com> | 2008-01-31 13:20:21 (GMT) |
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committer | Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com> | 2008-03-31 06:17:00 (GMT) |
commit | 210b94e864de9d50ed08603a1ff0834603f309e0 (patch) | |
tree | 7743310b311efadfdfc257b64aecd90da3a9f253 /arch/arm/mach-ns9xxx/plat-serial8250.c | |
parent | 05dda977f2574c3341abef9b74c27d2b362e1e3a (diff) | |
download | linux-210b94e864de9d50ed08603a1ff0834603f309e0.tar.xz |
ns9xxx: move registration of serial8250 to a dedicated file
Now the needed structs are allocated dynamically from __init code reducing
memory usage if the kernel runs on a board different from a9m9750dev.
Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
Diffstat (limited to 'arch/arm/mach-ns9xxx/plat-serial8250.c')
-rw-r--r-- | arch/arm/mach-ns9xxx/plat-serial8250.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/arch/arm/mach-ns9xxx/plat-serial8250.c b/arch/arm/mach-ns9xxx/plat-serial8250.c new file mode 100644 index 0000000..5aa5d9b --- /dev/null +++ b/arch/arm/mach-ns9xxx/plat-serial8250.c @@ -0,0 +1,69 @@ +/* + * arch/arm/mach-ns9xxx/plat-serial8250.c + * + * Copyright (C) 2008 by Digi International Inc. + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + */ +#include <linux/platform_device.h> +#include <linux/serial_8250.h> + +#include <asm/arch-ns9xxx/regs-board-a9m9750dev.h> +#include <asm/arch-ns9xxx/board.h> + +#define DRIVER_NAME "serial8250" + +static int __init ns9xxx_plat_serial8250_init(void) +{ + struct plat_serial8250_port *pdata; + struct platform_device *pdev; + int ret = -ENOMEM; + int i; + + if (!board_is_a9m9750dev()) + return -ENODEV; + + pdev = platform_device_alloc(DRIVER_NAME, 0); + if (!pdev) + goto err; + + pdata = kzalloc(5 * sizeof(*pdata), GFP_KERNEL); + if (!pdata) + goto err; + + pdev->dev.platform_data = pdata; + + pdata[0].iobase = FPGA_UARTA_BASE; + pdata[1].iobase = FPGA_UARTB_BASE; + pdata[2].iobase = FPGA_UARTC_BASE; + pdata[3].iobase = FPGA_UARTD_BASE; + + for (i = 0; i < 4; ++i) { + pdata[i].membase = (void __iomem *)pdata[i].iobase; + pdata[i].mapbase = pdata[i].iobase; + pdata[i].iotype = UPIO_MEM; + pdata[i].uartclk = 18432000; + pdata[i].flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ; + } + + pdata[0].irq = IRQ_FPGA_UARTA; + pdata[1].irq = IRQ_FPGA_UARTB; + pdata[2].irq = IRQ_FPGA_UARTC; + pdata[3].irq = IRQ_FPGA_UARTD; + + ret = platform_device_add(pdev); + if (ret) { +err: + platform_device_put(pdev); + + printk(KERN_WARNING "Could not add %s (errno=%d)\n", + DRIVER_NAME, ret); + } + + return 0; +} + +arch_initcall(ns9xxx_plat_serial8250_init); |