Merge tag 'spi-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi updates from Mark Brown:
 "There's quite a lot of small driver specific fixes and enhancements in
  this release but the main activity has been around the loopback and
  spidev test drivers which is good to see as it should hopefully help
  improve the quality of all the drivers as people start to make use of
  the new code:

   - Additional tests in the loopback test driver for vmalloc()
     compatibility and around delays together with fixes for existing
     tests.

   - Support for testing continuous data transfer for use in soak
     testing.

   - Device property support for board info platforms.

   - Support for registering empty sets of devices via board info
     (useful when writing code to enumerate hardware automatically)"

* tag 'spi-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (52 commits)
  spi: cadence: Allow for GPIO pins to be used as chipselects
  spi-imx: Implements handling of the SPI_READY mode flag.
  spi: tegra: fix spelling mistake: "trasfer" -> "transfer"
  spi: spi-ti-qspi: Use bounce buffer if read buffer is not DMA'ble
  spi: Add can_dma like interface for spi_flash_read
  spi: dw: Disable clock after unregistering the host
  spi: double time out tolerance
  spi: atmel: add deepest PM support to SAMA5D2
  spi: atmel: factorize reusable code for SPI controller init
  spi: orion: add LSB support
  spi: pl022: don't use uninitialized variable
  spi: loopback-test: fix spelling mistake: "minimam" -> "minimum"
  spi: dynamycally allocated message initialization
  spi: spi-ti-qspi: Remove unused dma_dev variable
  spi: omap2-mcspi: poll OMAP2_MCSPI_CHSTAT_RXS for PIO transfer
  spi: spi-ti-qspi: Use dma_engine wrapper for dma memcpy call
  spi: spidev_test: add option to continuously transfer data
  spi: loopback-test: fix potential integer overflow on multiple
  spi: sun6i: update max transfer size reported
  spi: pl022: Document property values
  ...

1 files changed, 31 insertions, 7 deletions

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 90b5b2efafbf..89254a55eb2e 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -31,6 +31,7 @@
 #include <linux/of_gpio.h>
 #include <linux/pm_runtime.h>
 #include <linux/pm_domain.h>
+#include <linux/property.h>
 #include <linux/export.h>
 #include <linux/sched/rt.h>
 #include <uapi/linux/sched/types.h>
@@ -600,13 +601,28 @@ struct spi_device *spi_new_device(struct spi_master *master,
 	proxy->controller_data = chip->controller_data;
 	proxy->controller_state = NULL;
 
-	status = spi_add_device(proxy);
-	if (status < 0) {
-		spi_dev_put(proxy);
-		return NULL;
+	if (chip->properties) {
+		status = device_add_properties(&proxy->dev, chip->properties);
+		if (status) {
+			dev_err(&master->dev,
+				"failed to add properties to '%s': %d\n",
+				chip->modalias, status);
+			goto err_dev_put;
+		}
 	}
 
+	status = spi_add_device(proxy);
+	if (status < 0)
+		goto err_remove_props;
+
 	return proxy;
+
+err_remove_props:
+	if (chip->properties)
+		device_remove_properties(&proxy->dev);
+err_dev_put:
+	spi_dev_put(proxy);
+	return NULL;
 }
 EXPORT_SYMBOL_GPL(spi_new_device);
 
@@ -664,6 +680,7 @@ static void spi_match_master_to_boardinfo(struct spi_master *master,
  *
  * The board info passed can safely be __initdata ... but be careful of
  * any embedded pointers (platform_data, etc), they're copied as-is.
+ * Device properties are deep-copied though.
  *
  * Return: zero on success, else a negative error code.
  */
@@ -673,7 +690,7 @@ int spi_register_board_info(struct spi_board_info const *info, unsigned n)
 	int i;
 
 	if (!n)
-		return -EINVAL;
+		return 0;
 
 	bi = kcalloc(n, sizeof(*bi), GFP_KERNEL);
 	if (!bi)
@@ -683,6 +700,13 @@ int spi_register_board_info(struct spi_board_info const *info, unsigned n)
 		struct spi_master *master;
 
 		memcpy(&bi->board_info, info, sizeof(*info));
+		if (info->properties) {
+			bi->board_info.properties =
+					property_entries_dup(info->properties);
+			if (IS_ERR(bi->board_info.properties))
+				return PTR_ERR(bi->board_info.properties);
+		}
+
 		mutex_lock(&board_lock);
 		list_add_tail(&bi->list, &board_list);
 		list_for_each_entry(master, &spi_master_list, list)
@@ -1015,7 +1039,7 @@ static int spi_transfer_one_message(struct spi_master *master,
 				ret = 0;
 				ms = 8LL * 1000LL * xfer->len;
 				do_div(ms, xfer->speed_hz);
-				ms += ms + 100; /* some tolerance */
+				ms += ms + 200; /* some tolerance */
 
 				if (ms > UINT_MAX)
 					ms = UINT_MAX;
@@ -2830,7 +2854,7 @@ int spi_flash_read(struct spi_device *spi,
 
 	mutex_lock(&master->bus_lock_mutex);
 	mutex_lock(&master->io_mutex);
-	if (master->dma_rx) {
+	if (master->dma_rx && master->spi_flash_can_dma(spi, msg)) {
 		rx_dev = master->dma_rx->device->dev;
 		ret = spi_map_buf(master, rx_dev, &msg->rx_sg,
 				  msg->buf, msg->len,