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Initial multi-omap support for omap4

Tony Lindgren linux-arm-kernel linux-omap 1 version New

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  1. v1 Latest0 of 9 patches 0 repliesNew

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Cover letter [PATCH 0/9] Initial multi-omap support for omap4
Quoted 31 lines · Shilimkar, Santosh
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Hi all,

These patches allow compiling in also omap4 into the multi-omap configuration. As I don't yet have omap4, I've only boot tested these on omap2 and omap3.

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Somebody with an omap4 board please boot test these with the omap3_defconfig and see what happens.. You might want to enable DEBUG_LL and EARLY_PRINTK with earlyprintk on the cmdline too.

Looks like this series have some dependent series because it doesn't apply on mainline.

So I tested this directly on linux-omap "multi-omap4" branch. It boots sufficiently but doesn't proceed after "brd_init". Didn't get much time to debug so attached log

Stand alone omap_4430sdp_defconfig also didn't fully boot on the linux-omap "multi-omap4". The log below shows that the serial platform data isn't configured correctly.

<6>io scheduler deadline registered
<6>io scheduler cfq registered (default)
<6>Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled <6>serial8250.0: ttyS0 at MMIO 0x4806a000 (irq = 104) is a ST16654 <6>serial8250.1: ttyS0 at MMIO 0x4806a000 (irq = 105) is a ST16654

Below patch to fix the boot for omap_4430sdp_defconfig. Small typo really.

arch/arm/plat-omap/include/plat/serial.h +0 -0
index 67ffa08..83dce4c 100644

arch/arm/plat-omap/include/plat/serial.h line 38

Quoted 7 lines
arch/arm/plat-omap/include/plat/serial.h +1 -1
@@ -33,7 +33,7 @@
 
 /* OMAP4 serial ports */
 #define OMAP4_UART1_BASE       OMAP2_UART1_BASE
-#define OMAP4_UART2_BASE       OMAP2_UART1_BASE
+#define OMAP4_UART2_BASE       OMAP2_UART2_BASE
 #define OMAP4_UART3_BASE       0x48020000
 #define OMAP4_UART4_BASE       0x4806e000

Heh OK :) Sounds like at this point it makes sense to merge that into the original patch redo omap-for-linus partially.

Can I also add your Acked-by for these patches then?

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For multi-omap build, for now I need to disable
[*] Reset unused clocks during boot

Sounds like omap4 has some clocks left on from the bootloader that it should clk_get and clk_enable during init. That should be easy to track if you boot with "debug" in your cmdline and take a look at the list of unused clocks that are shut down with late_initcall.

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With this OMAP4430 boots with omap3_defconfig :)

Cool, thanks, good to hear!

Now the only omap2/3/4 that's not booting with omap3_defconfig is 2430 because of the different clock offsets compare dot 2420. That should get fixed eventually though.

Regards,

Tony

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