Santosh Shilimkar <santosh.shilim...@ti.com> writes:
> 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.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>
One other problem, after looking at the Zoom2 UART stuff...
> ---
> 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 = PLAT8250_DEV_FOURPORT,
This should not be FOURPORT, it should just be a number. In this case,
it should be 3 (the others start from zero.)
The Zoom2 one should then be changed to something >= 4.
Kevin
> + .dev = {
> + .platform_data = serial_platform_data3,
> + },
> + },
> + },
> +#endif
> };
>
> void __init omap_serial_init(void)
> --
> 1.5.4.7
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