Leave the OCOTP turned on, so that we subsequent access do not fail.
After enabling the thermal driver on a mx6sxsabresd board:
U-Boot 2015.01-rc1-18267-g99d4189-dirty (Nov 24 2014 - 12:59:01)
CPU: Freescale i.MX6SX rev1.0 at 792 MHz CPU: Temperature 48 C Reset cause: POR Board: MX6SX SABRE SDB I2C: ready DRAM: 1 GiB PMIC: PFUZE100 ID=0x10 MMC: FSL_SDHC: 0, FSL_SDHC: 1, FSL_SDHC: 2 00:01.0 - 16c3:abcd - Bridge device 01:00.0 - 8086:08b1 - Network controller In: serial Out: serial Err: serial Net: (hang)
As the thermal driver accesses the ocotp registers, its clock will be disabled afterwards.
Then when the MAC address is read (also from ocotp registers) it will cause a hang.
Do not disable the ocotp clock to prevent this problem.
Signed-off-by: Fabio Estevam fabio.estevam@freescale.com --- drivers/misc/mxc_ocotp.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/drivers/misc/mxc_ocotp.c b/drivers/misc/mxc_ocotp.c index 3de1245..67f9429 100644 --- a/drivers/misc/mxc_ocotp.c +++ b/drivers/misc/mxc_ocotp.c @@ -81,8 +81,6 @@ static int finish_access(struct ocotp_regs *regs, const char *caller) err = !!(readl(®s->ctrl) & BM_CTRL_ERROR); clear_error(regs);
- enable_ocotp_clk(0); - if (err) { printf("mxc_ocotp %s(): Access protect error\n", caller); return -EIO;