Merge tag 'spi-v5.0' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi updates from Mark Brown:
 "One new core feature here, a small collection of new drivers and a
  bunch of small improvements in existing drivers:

   - A new CS_WORD flag for transfers where the chip select is toggled
     at every word, with both a generic implementation and the ability
     for controllers to do this automatically (including a DaVinci one).

   - New drivers for Mediatek MT2712, Qualcomm GENI and QSPI, Spreadtrum
     SPI and ST STM32 QSPI plus new IDs for several existing ones"

* tag 'spi-v5.0' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (86 commits)
  spi: lpspi: add imx8qxp compatible string
  spi: Allow building SPI_BCM63XX_HSSPI on ARM-based SoCs
  spi: omap2-mcspi: Add slave mode support
  spi: omap2-mcspi: Set FIFO DMA trigger level to word length
  spi: omap2-mcspi: Switch to readl_poll_timeout()
  spi: spi-mem: add stm32 qspi controller
  dt-bindings: spi: add stm32 qspi controller
  spi: sh-msiof: document R8A779{7|8}0 bindings
  spi: pic32-sqi: don't pass GFP_DMA32 to dma_alloc_coherent
  MAINTAINERS: Add entry for Broadcom SPI controller
  spi: sh-msiof: fix deferred probing
  spi: imx: use PIO mode if size is small
  spi: imx: correct wml as the last sg length
  spi: imx: move wml setting to later than setup_transfer
  PCI: Provide pci_match_id() with CONFIG_PCI=n
  spi: Make GPIO CSs honour the SPI_NO_CS flag
  spi/spi-pxa2xx: add PXA2xx SSP SPI Controller
  spi: pxa2xx: Add devicetree support
  spi: pxa2xx: Use an enum for type
  spi: spi-geni-qcom: Add SPI driver support for GENI based QUP
  ...

1 files changed, 23 insertions, 13 deletions

diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index a64235e05321..6be77fa5ab90 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -1,15 +1,6 @@
-/*
- * Copyright (C) 2005 David Brownell
+/* SPDX-License-Identifier: GPL-2.0-or-later
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * Copyright (C) 2005 David Brownell
  */
 
 #ifndef __LINUX_SPI_H
@@ -163,10 +154,12 @@ struct spi_device {
 #define	SPI_TX_QUAD	0x200			/* transmit with 4 wires */
 #define	SPI_RX_DUAL	0x400			/* receive with 2 wires */
 #define	SPI_RX_QUAD	0x800			/* receive with 4 wires */
+#define SPI_CS_WORD	0x1000			/* toggle cs after each word */
 	int			irq;
 	void			*controller_state;
 	void			*controller_data;
 	char			modalias[SPI_NAME_SIZE];
+	const char		*driver_override;
 	int			cs_gpio;	/* chip select gpio */
 
 	/* the statistics */
@@ -177,7 +170,6 @@ struct spi_device {
 	 * the controller talks to each chip, like:
 	 *  - memory packing (12 bit samples into low bits, others zeroed)
 	 *  - priority
-	 *  - drop chipselect after each word
 	 *  - chipselect delays
 	 *  - ...
 	 */
@@ -711,6 +703,8 @@ extern void spi_res_release(struct spi_controller *ctlr,
  * @delay_usecs: microseconds to delay after this transfer before
  *	(optionally) changing the chipselect status, then starting
  *	the next transfer or completing this @spi_message.
+ * @word_delay: clock cycles to inter word delay after each word size
+ *	(set by bits_per_word) transmission.
  * @transfer_list: transfers are sequenced through @spi_message.transfers
  * @tx_sg: Scatterlist for transmit, currently not for client use
  * @rx_sg: Scatterlist for receive, currently not for client use
@@ -793,6 +787,7 @@ struct spi_transfer {
 	u8		bits_per_word;
 	u16		delay_usecs;
 	u32		speed_hz;
+	u16		word_delay;
 
 	struct list_head transfer_list;
 };
@@ -1277,7 +1272,6 @@ spi_register_board_info(struct spi_board_info const *info, unsigned n)
 	{ return 0; }
 #endif
 
-
 /* If you're hotplugging an adapter with devices (parport, usb, etc)
  * use spi_new_device() to describe each device.  You can also call
  * spi_unregister_device() to start making that device vanish, but
@@ -1309,6 +1303,22 @@ spi_transfer_is_last(struct spi_controller *ctlr, struct spi_transfer *xfer)
 	return list_is_last(&xfer->transfer_list, &ctlr->cur_msg->transfers);
 }
 
+/* OF support code */
+#if IS_ENABLED(CONFIG_OF)
+
+/* must call put_device() when done with returned spi_device device */
+extern struct spi_device *
+of_find_spi_device_by_node(struct device_node *node);
+
+#else
+
+static inline struct spi_device *
+of_find_spi_device_by_node(struct device_node *node)
+{
+	return NULL;
+}
+
+#endif /* IS_ENABLED(CONFIG_OF) */
 
 /* Compatibility layer */
 #define spi_master			spi_controller