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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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             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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