linux-kernel - [PATCH v4 0/4] Add support for Microchip QSPI controller

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Date:   Mon, 8 Aug 2022 12:15:59 +0530
From:   Naga Sureshkumar Relli <nagasuresh.relli@...rochip.com>
To:     <broonie@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor.dooley@...rochip.com>
CC:     <linux-spi@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <Valentina.FernandezAlanis@...rochip.com>,
        Naga Sureshkumar Relli <nagasuresh.relli@...rochip.com>
Subject: [PATCH v4 0/4] Add support for Microchip QSPI controller

This patch enables the Microchip's FPGA QSPI and Polarfire SoC QSPI
controller support.

Tested spi-nand (W25N01GV) and spi-nor (MT25QL256A) on Microchip's
ICICLE kit. tested using both FPGA QSPI and Polarfie SoC QSPI.

changes in v4
-------------
1. Removed microchip,mpfs-qspi compatible from the driver
2. Changed platform_get_irq() return value check from <=0 to <0
3. Fixed dt_binding_check warning by installing latest yamllint

changes in v3
------------
1. Added dev_err_probe() at places like probe failures
2. Split the dt-bindings one for adding coreqspi compatible
   and other one to add coreqspi as fallback to mpfs-qspi.

changes in v2
------------
1. Replaced spi_alloc_master() with devm_spi_alloc_master()
2. Used dev_err_probe() when devm_spi_alloc_master() fails.
3. Added shared IRQ flag in the interrupt registration.
4. Updated the dt_bindings so that there is a differentiation
   between FPGA QSPI IP core and hard QSPI IP core.

Naga Sureshkumar Relli (4):
  spi: dt-binding: document microchip coreQSPI
  spi: dt-binding: add coreqspi as a fallback for mpfs-qspi
  spi: microchip-core-qspi: Add support for microchip fpga qspi
    controllers
  MAINTAINERS: add qspi to Polarfire SoC entry

 .../bindings/spi/microchip,mpfs-spi.yaml      |  15 +-
 MAINTAINERS                                   |   1 +
 drivers/spi/Kconfig                           |   9 +
 drivers/spi/Makefile                          |   1 +
 drivers/spi/spi-microchip-core-qspi.c         | 600 ++++++++++++++++++
 5 files changed, 622 insertions(+), 4 deletions(-)
 create mode 100644 drivers/spi/spi-microchip-core-qspi.c

-- 
2.25.1