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received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: zo6jg5m2VXYMFO8hBPPS+pSbwHfrMItMj/kAf9SSHyaDfAqqL0MzrRoz4N5BqkmvtkjF6+ycqr7EukAK0N7tsTI0fmYac4k1MCmN967x7mMxIjm+YiXchpclRbIeuhlti2TyxhBMUV0NiCst/Kvx48+jvu48KIHglWM+SvFc9Bl3EleCnrmNY3gZhL0R1J04fPr1X5kqk5Sg9w4MiW/5TiKOcsKXdrEN3pDBHP9PPFH7sznkL1/+yph6lBAjjS7s3yckWA9bHNUoHlibZOZhSsIOpc78o7SLOMgFccUM9C/CtscltmWnrrURABP4qZMkB4s97MoevoopAsyWyDEZ4rp2REEpG6Ta+H84zHxBLR6tqKAQuTt8CbwidEmRvmZqCzBAI3UAXqovwn3KHi8yH6CK7FwCN72Y8kmMYkOE6Nk= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 7d5fd395-65f2-4f41-77d4-08d6a1fd3bff X-MS-Exchange-CrossTenant-originalarrivaltime: 06 Mar 2019 06:30:32.8372 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM6PR04MB4373 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Mark, Sorry for replying so late. This patchset contains changes based on your an= d other reviewers' comments. As subject, these fucntions support, including: - Support i.MX8 series boards; - Support cs-gpio fucntion; - Support DMA mode for both master and salve mode. These are some notes about cs-gpio and DMA: - cs-gpio: Because LPSPI driver don't use default implementation of transfer_one_message(), I do the cs-gpio control way as same as the way used in spi core; - DMA: Any frame length longer than half txfifosize will be sent by DMA mode. For now, there are some limits: 1. The maximum transfer speed in master mode depends on the slave dev= ice, at least 40MHz on i.MX8 series (tested by spi-nor on 8qm-lpddr4-ar= m2 base board); 2. The maximum transfer speed I test in slave mode is 15MHz(i.MX7ULP)= , 20MHz(i.MX8 series). In order to reach the maximum speed which is mentioned in datasheet, the load of connect wires between master a= nd slave should be less than 15pF. Each patch in this patchset should base on the previous one when applied. Thank you! Clark Wang (7): spi: lpspi: Add i.MX8 boards support for lpspi doc: lpspi: Document DT bindings for LPSPI clocks spi: lpspi: add the error info of transfer speed setting spi: lpspi: use the core way to implement cs-gpio function spi: lpspi: add dma mode support spi: lpspi: Add the missing NULL check spi: lpspi: Code cleanup Han Xu (1): spi: lpspi: enable runtime pm for lpspi .../devicetree/bindings/spi/spi-fsl-lpspi.txt | 10 +- drivers/spi/spi-fsl-lpspi.c | 543 ++++++++++++++++-- 2 files changed, 495 insertions(+), 58 deletions(-) --=20 2.17.1