From 103ccee4ef1595468cf79c93068d253c7f2d85a8 Mon Sep 17 00:00:00 2001
From: Stephen Warren <swarren@nvidia.com>
Date: Wed, 10 Jul 2013 10:38:18 -0600
Subject: [PATCH] spi: revert master->setup function removal for altera and
nuc900
Commit 24778be "spi: convert drivers to use bits_per_word_mask" removed
what appeared to be redundant code from many drivers. However, it
appears that in the spi-bitbang case, these functions are required by
the spi-bitbang core, even if they don't do anything. Restore them.
For 3.12, the spi-bitbang core should be adjusted not to require these
callbacks to exist if they don't need to do anything.
This is the equivalent of Michal Simek's patch "spi/xilinx: Revert
master->setup function removal", applied to other affected drivers.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
---
drivers/spi/spi-altera.c | 12 ++++++++++++
drivers/spi/spi-nuc900.c | 13 +++++++++++++
2 files changed, 25 insertions(+)
diff --git a/drivers/spi/spi-altera.c b/drivers/spi/spi-altera.c
index 8a6bb37910da..81b9adb6e766 100644
--- a/drivers/spi/spi-altera.c
+++ b/drivers/spi/spi-altera.c
@@ -103,6 +103,16 @@ static void altera_spi_chipsel(struct spi_device *spi, int value)
}
}
+static int altera_spi_setupxfer(struct spi_device *spi, struct spi_transfer *t)
+{
+ return 0;
+}
+
+static int altera_spi_setup(struct spi_device *spi)
+{
+ return 0;
+}
+
static inline unsigned int hw_txbyte(struct altera_spi *hw, int count)
{
if (hw->tx) {
@@ -221,6 +231,7 @@ static int altera_spi_probe(struct platform_device *pdev)
master->bus_num = pdev->id;
master->num_chipselect = 16;
master->mode_bits = SPI_CS_HIGH;
+ master->setup = altera_spi_setup;
hw = spi_master_get_devdata(master);
platform_set_drvdata(pdev, hw);
@@ -229,6 +240,7 @@ static int altera_spi_probe(struct platform_device *pdev)
hw->bitbang.master = spi_master_get(master);
if (!hw->bitbang.master)
return err;
+ hw->bitbang.setup_transfer = altera_spi_setupxfer;
hw->bitbang.chipselect = altera_spi_chipsel;
hw->bitbang.txrx_bufs = altera_spi_txrx;
diff --git a/drivers/spi/spi-nuc900.c b/drivers/spi/spi-nuc900.c
index 2ad3d74ac021..150d85453c27 100644
--- a/drivers/spi/spi-nuc900.c
+++ b/drivers/spi/spi-nuc900.c
@@ -174,6 +174,17 @@ static void nuc900_spi_gobusy(struct nuc900_spi *hw)
spin_unlock_irqrestore(&hw->lock, flags);
}
+static int nuc900_spi_setupxfer(struct spi_device *spi,
+ struct spi_transfer *t)
+{
+ return 0;
+}
+
+static int nuc900_spi_setup(struct spi_device *spi)
+{
+ return 0;
+}
+
static inline unsigned int hw_txbyte(struct nuc900_spi *hw, int count)
{
return hw->tx ? hw->tx[count] : 0;
@@ -366,8 +377,10 @@ static int nuc900_spi_probe(struct platform_device *pdev)
master->num_chipselect = hw->pdata->num_cs;
master->bus_num = hw->pdata->bus_num;
hw->bitbang.master = hw->master;
+ hw->bitbang.setup_transfer = nuc900_spi_setupxfer;
hw->bitbang.chipselect = nuc900_spi_chipsel;
hw->bitbang.txrx_bufs = nuc900_spi_txrx;
+ hw->bitbang.master->setup = nuc900_spi_setup;
hw->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (hw->res == NULL) {