From: Kevin H. <ke...@ge...> - 2004-04-29 01:19:55
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Hi, I just want to say thanks for the work you've both done on Gumstix. Today I finally had time to work on my little project - building the HWUART port kernel went okay, and booting it from the MMC was surprisingly painless. Now I'm going to see about I2C to talk to my little speech synthesizer, if I end up with I2C related patches I'll send em out. Has anyone tried out using I2C on this ARM? Kevin |
From: Kevin H. <ke...@ge...> - 2004-04-29 06:23:19
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Hi, I won't bother with sending out patches until I have some device actually working, but I have noticed one small problem that might trip up others. In the latest kernel from Zach (presumably others as well). Change drivers/i2c/busses/Makefile from: obj-$(CONFIG_I2C_PXA) += pxa2xx_i2c.o to: obj-$(CONFIG_I2C_PXA2XX) += pxa2xx_i2c.o |
From: Zach W. <zw...@su...> - 2004-04-29 07:31:17
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Kevin Hester wrote: > Hi, > > I won't bother with sending out patches until I have some device > actually working, but I have noticed one small problem that might > trip up others. In the latest kernel from Zach (presumably others as > well). > > Change drivers/i2c/busses/Makefile from: > > obj-$(CONFIG_I2C_PXA) += pxa2xx_i2c.o > > to: > > obj-$(CONFIG_I2C_PXA2XX) += pxa2xx_i2c.o I fixed up the I2C stuff a bit from the older patches, and I apparently missed a couple of bits. Good catch. I will fold this into the next set of patches. I am also still writing up a response to your earlier inquiry, but I'm waiting to finish it until after I send a reply to a recent related lkml thread. Cheers, Zach Welch Superlucidity Services |
From: Zach W. <zw...@su...> - 2004-04-30 03:03:55
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Kevin Hester wrote: > Hi, > > I just want to say thanks for the work you've both done on Gumstix. > Today I finally had time to work on my little project - building the > HWUART port kernel went okay, and booting it from the MMC was > surprisingly painless. Now I'm going to see about I2C to talk to my > little speech synthesizer, if I end up with I2C related patches I'll > send em out. Has anyone tried out using I2C on this ARM? I have been exploring the Linux I2C subsystem as I design some boards to attach to it. From what I have seen, there isn't an existing driver for speech synthesizer chips, but neither are there for the class of devices that I am creating either. Fortunately, this class of drivers are fairly easy to write, and there is lots of code in the kernel to borrow. However, a recent thread on lkml shows that the I2C implementation has quite a ways to evolve into something as flexible as we might want for our purposes. I was going to put my two cents into the thread, as I considered my own emerging hardware designs. When it grew into two dollars, I decided to postpone my pontifications. Is your module a custom piece or something readily available? URL for its datasheet? As you discovered, the patches haven't been tested in every detail, but I appreciate your feedback. I look forward to seeing whatever patches you produce and the possibility of collaborating on the I2C infrastructure required for our devices (the stuff recently spared from being spewed to lkml). Cheers, Zach Welch Superlucidity Services |