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 id = 3 instead of "PLAT8250_DEV_FOURPORT" as suggested by Kevin. Signed-off-by: Syed Rafiuddin <rafiuddin.s...@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilim...@ti.com> Acked-by: Tony Lindgren <t...@atomide.com> Acked-by: Kevin Hilman <khil...@deeprootsystems.com> --- arch/arm/mach-omap2/board-4430sdp.c | 2 +- arch/arm/mach-omap2/serial.c | 27 ++++++++++++++++++++++++++- 2 files changed, 27 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c index b0c7402..1b22307 100644 --- a/arch/arm/mach-omap2/board-4430sdp.c +++ b/arch/arm/mach-omap2/board-4430sdp.c @@ -39,7 +39,7 @@ static struct platform_device *sdp4430_devices[] __initdata = { }; static struct omap_uart_config sdp4430_uart_config __initdata = { - .enabled_uarts = (1 << 0) | (1 << 1) | (1 << 2), + .enabled_uarts = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3), }; static struct omap_lcd_config sdp4430_lcd_config __initdata = { diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c index a7421a5..e1be77b 100644 --- a/arch/arm/mach-omap2/serial.c +++ b/arch/arm/mach-omap2/serial.c @@ -112,7 +112,21 @@ static struct plat_serial8250_port serial_platform_data2[] = { .flags = 0 } }; - +#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 +564,17 @@ 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) -- 1.5.4.7 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
