On Tue, Jul 28, 2015 at 01:27:07PM -0600, Stephen Warren wrote: > On 07/24/2015 04:01 PM, Tom Warren wrote: > >Based on Venice2, incorporates Stephen Warren's > >latest P2571 pinmux table. > > > >With Thierry Reding's 64-bit build fixes, this > >will build and and boot in 64-bit on my P2571 > >(when used with a 32-bit AVP loader). > > >diff --git a/board/nvidia/p2571/max77620_init.c > >b/board/nvidia/p2571/max77620_init.c > > >+void pmic_enable_cpu_vdd(void) > > This function is never called, or even linked into the binary. For previous > Tegra SoCs, it was called from the SPL before booting the CCPLEX. Since > there is no SPL for Tegra210, nothing calls this. > > >+ debug("%s: Set LDO2 for VDDIO_SDMMC_AP power to 3.3V\n", __func__); > >+ /* 0xF2 for 3.3v, enabled: bit7:6 = 11 = enable, bit5:0 = voltage */ > >+ reg = 0xF200 | MAX77620_CNFG1_L2_REG; > >+ tegra_i2c_ll_write_addr(MAX77620_I2C_ADDR, 2); > >+ tegra_i2c_ll_write_data(reg, I2C_SEND_2_BYTES); > >+ udelay(10 * 1000); > > This explains why the SD card isn't working for me on p2371-2180; I guess > the PMIC OTP on that board has this regulator disabled, and since this code > never runs, it never gets turned on. If I manually turn it on using the i2c > command, then "mmc dev 1" works. > > For p2571, I think we should either delete this file entirely. Or, at least > strip it down so that it's not touching global PMIC configuration but rather > just enabling any non-CCPLEX rails that U-Boot might need such as SD card > and USB, then rename the function and arrange for it to be called from > somewhere. I'm not sure what a good name and call-site would be yet.
Have you looked at my P2371 support patches? Specifically commit "ARM: tegra: Add NVIDIA P2371 support" has the board-level code that I've used to boot upstream on the device. There's a board_mmc_power_init() implementation which overrides the weak dummy provided in drivers/mmc/mmc.c. Thierry
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