From: Bryan O'Donoghue <pure.logic@nexus-software.ie>
To: l.stach@pengutronix.de, peng.fan@nxp.com, shawnguo@kernel.org,
srinivas.kandagatla@linaro.org, leonard.crestez@nxp.com
Cc: aisheng.dong@nxp.com, abel.vesa@nxp.com, anson.huang@nxp.com,
linux-imx@nxp.com, kernel@pengutronix.de, fabio.estevam@nxp.com,
Bryan O'Donoghue <pure.logic@nexus-software.ie>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH 0/6] Add i.MX8MM support
Date: Fri, 19 Apr 2019 11:03:21 +0100 [thread overview]
Message-ID: <20190419100327.31483-1-pure.logic@nexus-software.ie> (raw)
This set adds support for the i.MX8MM.
When adding support for this processor there are two interesting gotchas to
watch for.
#1 We current do not preserve the WAIT field for i.MX6 and since we are
reusing the i.MX6 set_timing() values, this would also affect i.MX8.
On the face of it, it appears to be an inocuous error with no real side
effects.
#2 Secondly the i.MX8MM will calculate a zero value for the RELAX bit-field
when programming up OTP fuses.
This is fine for programming the fuses but, it introduces a strange
failure state with reloading the shadow registers subsequent to blowing
an OTP fuse.
The second important patch here then is ensuring the RELAX field is
non-zero to avoid the failure state.
Bryan O'Donoghue (6):
nvmem: imx-ocotp: Allow selection of OCOTP for imx8 processors
nvmem: imx-ocotp: Fix i.MX OC-OTP naming prompt
nvmem: imx-ocotp: Add i.MX8MM support
nvmem: imx-ocotp: Ensure WAIT bits are preserved when setting timing
nvmem: imx-ocotp: Ensure the RELAX field is non-zero
dt-bindings: imx-ocotp: Add i.MX8MM support
.../devicetree/bindings/nvmem/imx-ocotp.txt | 1 +
drivers/nvmem/Kconfig | 4 ++--
drivers/nvmem/imx-ocotp.c | 17 ++++++++++++++++-
3 files changed, 19 insertions(+), 3 deletions(-)
--
2.20.1
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next reply other threads:[~2019-04-19 10:03 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-19 10:03 Bryan O'Donoghue [this message]
2019-04-19 10:03 ` [PATCH 1/6] nvmem: imx-ocotp: Allow selection of OCOTP for imx8 processors Bryan O'Donoghue
2019-04-19 10:03 ` [PATCH 2/6] nvmem: imx-ocotp: Fix i.MX OC-OTP naming prompt Bryan O'Donoghue
2019-04-19 10:03 ` [PATCH 3/6] nvmem: imx-ocotp: Add i.MX8MM support Bryan O'Donoghue
2019-04-19 10:32 ` Leonard Crestez
2019-04-19 11:48 ` Bryan O'Donoghue
2019-04-19 16:45 ` Bryan O'Donoghue
2019-04-19 10:03 ` [PATCH 4/6] nvmem: imx-ocotp: Ensure WAIT bits are preserved when setting timing Bryan O'Donoghue
2019-04-19 10:03 ` [PATCH 5/6] nvmem: imx-ocotp: Ensure the RELAX field is non-zero Bryan O'Donoghue
2019-04-19 10:03 ` [PATCH 6/6] dt-bindings: imx-ocotp: Add i.MX8MM support Bryan O'Donoghue
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