From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fabio Estevam Date: Fri, 17 Jan 2020 14:18:55 -0300 Subject: question: mx7ulp - LDO_ENABLED_MODE In-Reply-To: <20200117165104.GC3054@trex> References: <20200116203000.GA21781@trex> <20200117165104.GC3054@trex> Message-ID: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: quoted-printable To: u-boot@lists.denx.de On Fri, Jan 17, 2020 at 1:51 PM Jorge Ramirez-Ortiz, Gmail wrote: > btw was checking the TRM manual (Chapter 28, PMC - page 1172) > > [..] > PMC1 power mode[LDOVL] fields don=E2=80=99t necessarily satisfy the opera= tion voltage levels > required by the system. Such operation voltage requirements can be found = on i.MX 7ULP > Data Sheet. In this sense, no power transition should be performed before= ensuring the > mentioned register fields are matching the required operation voltage lev= els expressed on > the data sheet. > > =3D> 0.95V in the ldt_init function, is it in the data sheet? > I just cant find that particular document Yes, please take a look at https://www.nxp.com/docs/en/data-sheet/IMX7ULPCE= C.pdf (Table 5 - Search for PMC1_STOP[LDOVL] where it shows 0.95V as the typical value)