From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Nazzareno Trimarchi Date: Fri, 4 Dec 2020 22:44:15 +0100 Subject: About the commit imx: mx6ull: update the REFTOP_VBGADJ setting Message-ID: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi Peng I have a design with imx6ull that is running properly according to the manufacturer with the old REFTOP_VBGA set BM_ANADIG_ANA_MISC0_REFTOP_VBGADJ,. With this commit, the TJunction of the CPU is around 8 degree more than without. The commit message does not provide any info According to the design team, we need to set REFTOP_VBGADJ in PMU MISC0 according to the REFTOP_TRIM[2:0] fuse. the actually table is as below: '000" - set REFTOP_VBGADJ[2:0] to 3'b000 '001" - set REFTOP_VBGADJ[2:0] to 3'b001 '010" - set REFTOP_VBGADJ[2:0] to 3'b010 '011" - set REFTOP_VBGADJ[2:0] to 3'b011 '100" - set REFTOP_VBGADJ[2:0] to 3'b100 '101" - set REFTOP_VBGADJ[2:0] to 3'b101 '110" - set REFTOP_VBGADJ[2:0] to 3'b110 '111" - set REFTOP_VBGADJ[2:0] to 3'b111 Can someone describe to me better? The device needs to run in a very hot environment and 10 to 8 degrees on the junction are really important. In the same environment: temp without this patch 34 temp with is 43 Register value is 0x240080E8 and 0x24008088 Michael -- Michael Nazzareno Trimarchi Amarula Solutions BV COO Co-Founder Cruquiuskade 47 Amsterdam 1018 AM NL T. +31(0)851119172 M. +39(0)3479132170 [`as] https://www.amarulasolutions.com