From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tom Warren Date: Thu, 28 Jan 2016 17:30:11 +0000 Subject: [U-Boot] [PATCH] ARM: tegra: rm Jetson TK1 PMIC GPIO programming In-Reply-To: <56AA4BA6.4040406@wwwdotorg.org> References: <1453141396-18350-1-git-send-email-swarren@wwwdotorg.org> <3a053560b0874c70867c39bb95d66bfe@HQMAIL103.nvidia.com> <56AA4BA6.4040406@wwwdotorg.org> Message-ID: <5936d18a16ed440484771300eb7d6dc4@HQMAIL104.nvidia.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de OK. I was waiting to see if Simon's dm display driver changes would go in via the Tegra repo (they apply / build OK now, but I've had no time for testing). With the merge window closing, I'll send a PR with just this fix. Thanks. Tom > -----Original Message----- > From: Stephen Warren [mailto:swarren at wwwdotorg.org] > Sent: Thursday, January 28, 2016 10:11 AM > To: Tom Warren > Cc: u-boot at lists.denx.de; Simon Glass ; Stephen Warren > ; Thierry Reding > Subject: Re: [PATCH] ARM: tegra: rm Jetson TK1 PMIC GPIO programming > > On 01/18/2016 12:16 PM, Tom Warren wrote: > > Stephen Warren wrotea tMonday, January 18, 2016 11:23 AM: > >> The PMIC is configured such that its GPIOs have the correct > >> configuration at power-up, so no programming is required. > >> > >> In fact, the current programming is actively wrong, since: > >> > >> (a) the AS3722 driver configures the GPIO to be an output before > >> setting its output value, which causes a 0v glitch on the output. > >> > >> (b) the AS3722 driver configures the GPIO to drive a high voltage > >> from its VSUP_GPIO power source rather than its VDD_GPIO_LV power > >> source, so the pin drives 5V not 1.8V as desired. > >> > >> Solve these problems by removing the code which configures the PMIC > GPIOs. > >> > >> Note that this patch was tested directly on top of v2016.01; since > >> then, commit > >> 96350f729c42 "dm: tegra: net: Convert tegra boards to driver model > >> for Ethernet" prevents PCIe from being initialized. Alternatively, > >> simply revert that commit to get PCIe Ethernet working again, then apply > this patch to test. > >> > > Acked-by: Tom Warren I'll apply this to > > u-boot-tegra/next ASAP. > > I don't see this patch there yet. It'd be good to get it pulled upstream ASAP > since the merge window for v2016.03 closes this weekend. ----------------------------------------------------------------------------------- This email message is for the sole use of the intended recipient(s) and may contain confidential information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message. -----------------------------------------------------------------------------------