Merge tag 'spi-v3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi updates from Mark Brown:
 "As well as the usual driver updates and cleanups there's a few
  improvements to the core here:

   - The start of some improvements to factor out more of the SPI
     message loop into the core.  Right now this is just simplifying the
     code a bit but hopefully next time around we'll also have managed
     to roll out some noticable performance improvements which drivers
     can take advantage of.
   - Support for loading modules for ACPI enumerated SPI devices.
   - Managed registration for SPI controllers.
   - Helper for another common I/O pattern"

* tag 'spi-v3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (116 commits)
  spi/hspi: add device tree support
  spi: atmel: fix return value check in atmel_spi_probe()
  spi: spi-imx: only enable the clocks when we start to transfer a message
  spi/s3c64xx: Fix doubled clock disable on suspend
  spi/s3c64xx: Do not ignore return value of spi_master_resume/suspend
  spi: spi-mxs: Use u32 instead of uint32_t
  spi: spi-mxs: Don't set clock for each xfer
  spi: spi-mxs: Clean up setup_transfer function
  spi: spi-mxs: Remove check of spi mode bits
  spi: spi-mxs: Fix race in setup method
  spi: spi-mxs: Remove bogus setting of ssp clk rate field
  spi: spi-mxs: Remove full duplex check, spi core already does it
  spi: spi-mxs: Fix chip select control bits in DMA mode
  spi: spi-mxs: Fix extra CS pulses and read mode in multi-transfer messages
  spi: spi-mxs: Change flag arguments in txrx functions to bit flags
  spi: spi-mxs: Always clear INGORE_CRC, to keep CS asserted
  spi: spi-mxs: Remove mxs_spi_enable and mxs_spi_disable
  spi: spi-mxs: Always set LOCK_CS
  spi/s3c64xx: Add missing pm_runtime_put on setup fail
  spi/s3c64xx: Add missing pm_runtime_set_active() call in probe()
  ...

1 files changed, 34 insertions, 1 deletions

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 15323d8bd9cf..b80f2f70fef7 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -749,6 +749,35 @@ static void spi_imx_cleanup(struct spi_device *spi)
 {
 }
 
+static int
+spi_imx_prepare_message(struct spi_master *master, struct spi_message *msg)
+{
+	struct spi_imx_data *spi_imx = spi_master_get_devdata(master);
+	int ret;
+
+	ret = clk_enable(spi_imx->clk_per);
+	if (ret)
+		return ret;
+
+	ret = clk_enable(spi_imx->clk_ipg);
+	if (ret) {
+		clk_disable(spi_imx->clk_per);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int
+spi_imx_unprepare_message(struct spi_master *master, struct spi_message *msg)
+{
+	struct spi_imx_data *spi_imx = spi_master_get_devdata(master);
+
+	clk_disable(spi_imx->clk_ipg);
+	clk_disable(spi_imx->clk_per);
+	return 0;
+}
+
 static int spi_imx_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
@@ -786,7 +815,7 @@ static int spi_imx_probe(struct platform_device *pdev)
 	master->num_chipselect = num_cs;
 
 	spi_imx = spi_master_get_devdata(master);
-	spi_imx->bitbang.master = spi_master_get(master);
+	spi_imx->bitbang.master = master;
 
 	for (i = 0; i < master->num_chipselect; i++) {
 		int cs_gpio = of_get_named_gpio(np, "cs-gpios", i);
@@ -810,6 +839,8 @@ static int spi_imx_probe(struct platform_device *pdev)
 	spi_imx->bitbang.txrx_bufs = spi_imx_transfer;
 	spi_imx->bitbang.master->setup = spi_imx_setup;
 	spi_imx->bitbang.master->cleanup = spi_imx_cleanup;
+	spi_imx->bitbang.master->prepare_message = spi_imx_prepare_message;
+	spi_imx->bitbang.master->unprepare_message = spi_imx_unprepare_message;
 	spi_imx->bitbang.master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
 
 	init_completion(&spi_imx->xfer_done);
@@ -872,6 +903,8 @@ static int spi_imx_probe(struct platform_device *pdev)
 
 	dev_info(&pdev->dev, "probed\n");
 
+	clk_disable(spi_imx->clk_ipg);
+	clk_disable(spi_imx->clk_per);
 	return ret;
 
 out_clk_put: