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| author |   Santosh Shilimkar <santosh.shilimkar@ti.com> | 2009-08-22 13:30:11 +0530 |
|---|---|---|
| committer |   Kevin Hilman <khilman@deeprootsystems.com> | 2009-09-02 15:07:53 -0700 |
| commit | 0e3eaadfe3da84f98250ad8a2c36e87fe00e42ee (patch) | |
| tree | 1404b0951aa4489b0992c04ca212d2002b503a95 /arch/arm/mach-omap2/serial.c | |
| parent | OMAP3: update OMAP3 Beagle defconfig (diff) | |
| download | linux-dev-0e3eaadfe3da84f98250ad8a2c36e87fe00e42ee.tar.xz linux-dev-0e3eaadfe3da84f98250ad8a2c36e87fe00e42ee.zip | |
ARM: OMAP4: Fix NULL pointer dereference crash.
After the patch series "[PATCH 00/14] OMAP PM fixes for .31-rc"
merge in 2.6.31-rc5, the kernel crashed during boot on OMAP4430.
This patch fixes it by adding UART4 support and related code.
Without this patch omap_serial_init() would produce " NULL pointer
dereference" and kernel crashes in the bootup on OMAP4430 platform.
Some more info on the merge issue can be found here.
More info- http://lkml.org/lkml/2009/8/20/192
Note: While merging this patch,"IO_ADDRESS" needs to be changed
to "OMAP2_IO_ADDRESS" if the Tony's below series is already merged in.
http://www.mail-archive.com/linux-omap@vger.kernel.org/msg15072.html
Signed-off-by: Syed Rafiuddin <rafiuddin.syed@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-omap2/serial.c')
| -rw-r--r-- | arch/arm/mach-omap2/serial.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c index dd3c735b5588..645546cbd265 100644 --- a/arch/arm/mach-omap2/serial.c +++ b/arch/arm/mach-omap2/serial.c @@ -113,6 +113,21 @@ static struct plat_serial8250_port serial_platform_data2[] = { } }; +#ifdef CONFIG_ARCH_OMAP4 +static struct plat_serial8250_port serial_platform_data3[] = { + { + .membase = IO_ADDRESS(OMAP_UART4_BASE), + .mapbase = OMAP_UART4_BASE, + .irq = 70, + .flags = UPF_BOOT_AUTOCONF, + .iotype = UPIO_MEM, + .regshift = 2, + .uartclk = OMAP24XX_BASE_BAUD * 16, + }, { + .flags = 0 + } +}; +#endif static inline unsigned int serial_read_reg(struct plat_serial8250_port *up, int offset) { @@ -550,6 +565,17 @@ static struct omap_uart_state omap_uart[OMAP_MAX_NR_PORTS] = { }, }, }, +#ifdef CONFIG_ARCH_OMAP4 + { + .pdev = { + .name = "serial8250", + .id = 3 + .dev = { + .platform_data = serial_platform_data3, + }, + }, + }, +#endif }; void __init omap_serial_init(void) |