On Sat, Sep 08, 2012 at 06:38:21AM +0000, AnilKumar, Chimata wrote: > On Wed, Sep 05, 2012 at 19:59:54, Koen Kooi wrote: > > > > Op 5 sep. 2012, om 16:24 heeft Matt Porter <mporter@xxxxxx> het volgende geschreven: > > > > > On Wed, Sep 05, 2012 at 03:29:30PM +0200, Koen Kooi wrote: > > >> > > >> Op 28 aug. 2012, om 07:34 heeft "AnilKumar, Chimata" <anilkumar@xxxxxx> het volgende geschreven: > > >> > > >>> Hi Koen, > > >>> > > >>> On Fri, Aug 24, 2012 at 13:32:17, Koen Kooi wrote: > > >>>> > > >>>> Op 24 aug. 2012, om 09:56 heeft Koen Kooi <koen@xxxxxxxxxxxxxxxxxxxxx> het volgende geschreven: > > >>>> > > >>>>> > > >>>>> Op 24 aug. 2012, om 09:26 heeft "AnilKumar, Chimata" <anilkumar@xxxxxx> het volgende geschreven: > > >>>>> > > >>>>>> Hi Koen, > > >>>>>> > > >>>>>> On Fri, Aug 24, 2012 at 11:58:34, Koen Kooi wrote: > > >>>>>>> > > >>>>>>> Op 24 aug. 2012, om 07:50 heeft "AnilKumar, Chimata" <anilkumar@xxxxxx> het volgende geschreven: > > >>>>>>> > > >>>>>>>> Hi Koen, > > >>>>>>>> > > >>>>>>>> On Thu, Aug 23, 2012 at 19:43:48, Koen Kooi wrote: > > >>>>>>>>> > > >>>>>>>>> Op 21 aug. 2012, om 13:17 heeft AnilKumar Ch <anilkumar@xxxxxx> het volgende geschreven: > > >>>>>>>>> > > >>>>>>>>>> Add tps65217 regulator device tree data to AM335x-Bone by adding > > >>>>>>>>>> regulator consumers with tightened constraints and regulator-name. > > >>>>>>>>>> TPS65217 regulator handle can be obtained by using this regulator > > >>>>>>>>>> name. > > >>>>>>>>>> > > >>>>>>>>>> This patch also add I2C node with I2C frequency and tps65217 PMIC > > >>>>>>>>>> I2C slave address. > > >>>>>>>>>> > > >>>>>>>>>> Signed-off-by: AnilKumar Ch <anilkumar@xxxxxx> > > >>>>>>>>> > > >>>>>>>>> I tried this and the kernel immediately crashes on my beaglebone. Could you upload the complete git tree and .config you used to test this to somewhere public please? > > >>>>>>>> > > >>>>>>>> Use this repo to test on beaglebone > > >>>>>>>> https://github.com/hvaibhav/am335x-linux/commits/am335x-upstream-staging-pinctrl > > >>>>>>>> > > >>>>>>>> This wiki talks about how to build and use? > > >>>>>>>> https://github.com/hvaibhav/am335x-linux/wiki/How-To-Use-Upstream-Tree > > >>>>>>>> > > >>>>>>>> Note: Enable tps65217 regulator in kernel config. > > >>>>>>> > > >>>>>>> I used that repo and as a seperate test I rebased that to latest mainline, same thing: as soon as I turn on the TPS in the .config it crashes on boot. Is the pinctrl repo the *exact* repo you used to test the patches on beaglebone? > > >>>>>> > > >>>>>> I tested on latest mainline after merging to > > >>>>>> am335x-upstream-staging-pinctrl (voltage also changing) > > >>>>>> > > >>>>>> Can you share your .config and uImage? > > >>>>> > > >>>>> Config: https://github.com/beagleboard/kernel/blob/beaglebone-3.6/patches/configs/beaglebone > > >>>>> > > >>>>>> My config details:- (After merge) > > >>>>>> 1. omap2plus_defconfig > > >>>>>> 2. Enable tps65217 MFD driver > > >>>>>> 3. Enable tps65217 regulator driver > > >>>>> > > >>>>> > > >>>>> I rebased onto latest mainline and refreshed the base patches from Vaibhav and I now get: > > >>>>> > > >>>>> [ 0.246796] tps65217 0-0024: TPS65217 ID 0xf version 1.1 > > >>>>> > > >>>>> So it boots! I don't know what made it break before, but it's working now :) > > >>>> > > >>>> *sigh* I'm an idiot: > > >>>> > > >>>> root@beaglebone:~# uname -a > > >>>> Linux beaglebone 3.6.0-rc3-00103-gfd02083 #86 SMP Fri Aug 24 09:45:54 CEST 2012 armv7l GNU/Linux > > >>>> root@beaglebone:~# zcat /proc/config.gz | grep 217 > > >>>> CONFIG_MFD_TPS65217=y > > >>>> # CONFIG_REGULATOR_TPS65217 is not set > > >>>> > > >>>> Will retry with regulator driver actually turned on in a bit. > > >>> > > >>> Is it working after enabling the regulator? > > >> > > >> It took me a while to get back to this problem, but it still isn't working for me. I did manage to get more info on the error: > > >> > > >> root@bone-mainline:~# insmod tps65217-regulator.ko > > >> [ 32.754419] Unable to handle kernel NULL pointer dereference at virtual address 000000c8 > > >> [ 32.763087] pgd = cea60000 > > >> [ 32.765969] [000000c8] *pgd=8fbed831, *pte=00000000, *ppte=00000000 > > >> [ 32.772617] Internal error: Oops: 17 [#1] SMP THUMB2 > > >> [ 32.777827] Modules linked in: tps65217_regulator(+) ip_tables x_tables snd_soc_omap snd_soc_core regmap_spi snd_pcm snd_timer snd soundcore snd_page_alloc ipv6 > > >> [ 32.792976] CPU: 0 Not tainted (3.6.0-rc4 #109) > > >> [ 32.798106] PC is at regmap_read+0x8/0x38 > > >> [ 32.802315] LR is at regulator_get_voltage_sel_regmap+0x15/0x38 > > > > > > I just got to this same point last night as I needed this working to > > > test omap_hsmmc with edma dmaengine... > > > > > > The problem is that the tps65217-regulator driver is handing the wrong > > > device to regulator_register() and it contains a null regmap. This patch > > > passes in the the parent dev to fix it. Maybe I missed another patch > > > that addresses this in a different way, such as the regulator devices > > > being stuffed with the regmap devres? > > > > > > -Matt > > > > > > From 40d118bebc5eaf2a8df4f8b5e113b892a3210f96 Mon Sep 17 00:00:00 2001 > > > From: Matt Porter <mporter@xxxxxx> > > > Date: Wed, 5 Sep 2012 10:09:50 -0400 > > > Subject: [PATCH] regulator: tps65217: fix crash during registration > > > > > > The struct device for each platform device bound to this > > > driver is a child to the parent mfd device. The parent device > > > is the one that actually contains the regmap devres so fix the > > > null pointer dereference during the first regmap access in > > > registration by passing in the parent device. > > > > > > Signed-off-by: Matt Porter <mporter@xxxxxx> > > > --- > > > drivers/regulator/tps65217-regulator.c | 2 +- > > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > > > diff --git a/drivers/regulator/tps65217-regulator.c b/drivers/regulator/tps65217-regulator.c > > > index 6caa222..af4916c 100644 > > > --- a/drivers/regulator/tps65217-regulator.c > > > +++ b/drivers/regulator/tps65217-regulator.c > > > @@ -292,7 +292,7 @@ static int __devinit tps65217_regulator_probe(struct platform_device *pdev) > > > tps = dev_to_tps65217(pdev->dev.parent); > > > tps->info[pdev->id] = info; > > > > > > - config.dev = &pdev->dev; > > > + config.dev = pdev->dev.parent; > > > config.of_node = pdev->dev.of_node; > > > config.init_data = pdev->dev.platform_data; > > > config.driver_data = tps; > > > -- > > > 1.7.9.5 > > > > That patch fixes it for me: > > This patch is not required, added a new feature to core.c file to address > this. https://lkml.org/lkml/2012/9/7/390 Looks good, thanks for addressing it in the core. -Matt -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
