i.MX ProcessorsのトピックWhy MX6Q PMIC i2c access failed after entered linux kernel https://community.nxp.com/t5/i-MX-Processors/Why-MX6Q-PMIC-i2c-access-failed-after-entered-linux-kernel/m-p/243837#M20770 <HTML><HEAD></HEAD><BODY><P>My sabresd based new custom board, kernel report error:</P><P>mc_pfuze 1-0008: recv failed!:-5,0</P><P>mc_pfuze: probe of 1-0008 failed with error -5</P><P>Hardware reset to PMIC, boot loader can probe PMIC properly:</P><P>Found PFUZE100! deviceid=10,revid=11</P><P></P><P> Because our linux system software reset is WDOG based, it won't reset PMIC. </P><P>After reset ,boot loader will not report PFUZE100 found. Strange issue, Why?</P><P> With oscilloscope support, I found the PFUZE100 i2c access failed with no ACK in 9th i2c clk.</P><P>Anyone ever encounter issue like this?</P></BODY></HTML> Sat, 21 Sep 2013 11:55:44 GMT raymondwang 2013-09-21T11:55:44Z Why MX6Q PMIC i2c access failed after entered linux kernel https://community.nxp.com/t5/i-MX-Processors/Why-MX6Q-PMIC-i2c-access-failed-after-entered-linux-kernel/m-p/243837#M20770 <HTML><HEAD></HEAD><BODY><P>My sabresd based new custom board, kernel report error:</P><P>mc_pfuze 1-0008: recv failed!:-5,0</P><P>mc_pfuze: probe of 1-0008 failed with error -5</P><P>Hardware reset to PMIC, boot loader can probe PMIC properly:</P><P>Found PFUZE100! deviceid=10,revid=11</P><P></P><P> Because our linux system software reset is WDOG based, it won't reset PMIC. </P><P>After reset ,boot loader will not report PFUZE100 found. Strange issue, Why?</P><P> With oscilloscope support, I found the PFUZE100 i2c access failed with no ACK in 9th i2c clk.</P><P>Anyone ever encounter issue like this?</P></BODY></HTML> Sat, 21 Sep 2013 11:55:44 GMT https://community.nxp.com/t5/i-MX-Processors/Why-MX6Q-PMIC-i2c-access-failed-after-entered-linux-kernel/m-p/243837#M20770 raymondwang 2013-09-21T11:55:44Z Re: Why MX6Q PMIC i2c access failed after entered linux kernel https://community.nxp.com/t5/i-MX-Processors/Why-MX6Q-PMIC-i2c-access-failed-after-entered-linux-kernel/m-p/243838#M20771 <HTML><HEAD></HEAD><BODY><P>Touch panel and PMIC share the same i2c bus but has different pull up power voltage.</P></BODY></HTML> Thu, 26 Sep 2013 07:26:47 GMT https://community.nxp.com/t5/i-MX-Processors/Why-MX6Q-PMIC-i2c-access-failed-after-entered-linux-kernel/m-p/243838#M20771 raymondwang 2013-09-26T07:26:47Z