[v3] pmdomain: imx: Fix i.MX8MP VC8000E power up sequence

[PATCH v3 0/2] pmdomain: imx: Fix i.MX8MP VC8000E power up sequence

Peng Fan (OSS) posted 2 patches 1 week, 2 days ago

Diff against v2
Download series mbox

drivers/pmdomain/imx/imx8m-blk-ctrl.c | 45 +++++++++++++++++++++++++++++++++--
1 file changed, 43 insertions(+), 2 deletions(-)

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[PATCH v3 0/2] pmdomain: imx: Fix i.MX8MP VC8000E power up sequence

Posted by Peng Fan (OSS) 1 week, 2 days ago

There is an errata for i.MX8MP VC8000E:
    ERR050531: VPU_NOC power down handshake may hang during VC8000E/VPUMIX
    power up/down cycling.
    Description: VC8000E reset de-assertion edge and AXI clock may have a
    timing issue.
    Workaround: Set bit2 (vc8000e_clk_en) of BLK_CLK_EN_CSR to 0 to gate off
    both AXI clock and VC8000E clock sent to VC8000E and AXI clock sent to
    VPU_NOC m_v_2 interface during VC8000E power up(VC8000E reset is
    de-asserted by HW)

This patchset is to fix the errata. More info could be found in each
patch commit.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
Changes in v3:
- Separate power up notifier fix into patch 1
- Link to v2: https://lore.kernel.org/r/20260228-imx8mp-vc8000e-pm-v2-1-fd255a0d5958@nxp.com

Changes in v2:
- Add errata link in commit message
- Add comment for is_errata_err050531
- Link to v1: https://lore.kernel.org/r/20260128-imx8mp-vc8000e-pm-v1-1-6c171451c732@nxp.com

---
Peng Fan (2):
      pmdomain: imx: Fix i.MX8MP power notifier
      pmdomain: imx: Fix i.MX8MP VC8000E power up sequence

 drivers/pmdomain/imx/imx8m-blk-ctrl.c | 45 +++++++++++++++++++++++++++++++++--
 1 file changed, 43 insertions(+), 2 deletions(-)
---
base-commit: b3ab9a7b9b32806b1b68c4fe7d5298702195eb3a
change-id: 20260128-imx8mp-vc8000e-pm-4278e6d48b54

Best regards,
-- 
Peng Fan <peng.fan@nxp.com>