[PATCH 1/4] spi: sh-msiof: Remove unneeded clock name

[PATCH 1/4] spi: sh-msiof: Remove unneeded clock name

[Bastian Hecht]

clk_get() no longer needs a character string for associating the right
clock as this is done via the device struct now.

Signed-off-by: Bastian Hecht <hechtb-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 drivers/spi/spi-sh-msiof.c |    6 ++----
 1 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index 1f466bc..96358d0 100644
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c
@@ -597,7 +597,6 @@ static int sh_msiof_spi_probe(struct platform_device *pdev)
 	struct resource	*r;
 	struct spi_master *master;
 	struct sh_msiof_spi_priv *p;
-	char clk_name[16];
 	int i;
 	int ret;
 
@@ -614,10 +613,9 @@ static int sh_msiof_spi_probe(struct platform_device *pdev)
 	p->info = pdev->dev.platform_data;
 	init_completion(&p->done);
 
-	snprintf(clk_name, sizeof(clk_name), "msiof%d", pdev->id);
-	p->clk = clk_get(&pdev->dev, clk_name);
+	p->clk = clk_get(&pdev->dev, NULL);
 	if (IS_ERR(p->clk)) {
-		dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
+		dev_err(&pdev->dev, "cannot get clock\n");
 		ret = PTR_ERR(p->clk);
 		goto err1;
 	}
-- 
1.7.5.4


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[PATCH 2/4] spi: Add SH Mobile series as dependency to MSIOF controller

[Bastian Hecht]

The MSIOF hardware block is used in the SH Mobile series as well, so we
add it here.

Signed-off-by: Bastian Hecht <hechtb-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 drivers/spi/Kconfig |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index cd2fe35..cf77a4b 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -318,10 +318,10 @@ config SPI_S3C64XX
 
 config SPI_SH_MSIOF
 	tristate "SuperH MSIOF SPI controller"
-	depends on SUPERH && HAVE_CLK
+	depends on (SUPERH || ARCH_SHMOBILE) && HAVE_CLK
 	select SPI_BITBANG
 	help
-	  SPI driver for SuperH MSIOF blocks.
+	  SPI driver for SuperH and SH Mobile MSIOF blocks.
 
 config SPI_SH
 	tristate "SuperH SPI controller"
-- 
1.7.5.4


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[PATCH 3/4] spi: sh-msiof: Add device tree parsing to driver

[Bastian Hecht]

This adds the capability to retrieve setup data from the device tree
node. The usage of platform data is still available.

The type of chip_select has been changed from u16 to int so that
of_property_read_u32 does not overwrite other data.

Signed-off-by: Bastian Hecht <hechtb-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 drivers/spi/spi-sh-msiof.c   |   51 +++++++++++++++++++++++++++++++++++++++++-
 include/linux/spi/sh_msiof.h |    2 +-
 2 files changed, 51 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index 96358d0..467d645 100644
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c
@@ -20,6 +20,7 @@
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 
@@ -592,6 +593,32 @@ static u32 sh_msiof_spi_txrx_word(struct spi_device *spi, unsigned nsecs,
 	return 0;
 }
 
+#ifdef CONFIG_OF
+static struct sh_msiof_spi_info *sh_msiof_spi_parse_dt(struct device *dev)
+{
+	struct sh_msiof_spi_info *info;
+	struct device_node *np = dev->of_node;
+
+	info = devm_kzalloc(dev, sizeof(struct sh_msiof_spi_info), GFP_KERNEL);
+	if (!info) {
+		dev_err(dev, "failed to allocate setup data\n");
+		return NULL;
+	}
+
+	/* Parse the MSIOF properties */
+	of_property_read_u32(np, "chip-select", &info->num_chipselect);
+	of_property_read_u32(np, "tx_fifo_size", &info->tx_fifo_override);
+	of_property_read_u32(np, "rx_fifo_size", &info->rx_fifo_override);
+
+	return info;
+}
+#else
+static struct sh_msiof_spi_info *sh_msiof_spi_parse_dt(struct device *dev)
+{
+	return NULL;
+}
+#endif
+
 static int sh_msiof_spi_probe(struct platform_device *pdev)
 {
 	struct resource	*r;
@@ -610,7 +637,17 @@ static int sh_msiof_spi_probe(struct platform_device *pdev)
 	p = spi_master_get_devdata(master);
 
 	platform_set_drvdata(pdev, p);
-	p->info = pdev->dev.platform_data;
+	if (pdev->dev.of_node)
+		p->info = sh_msiof_spi_parse_dt(&pdev->dev);
+	else
+		p->info = pdev->dev.platform_data;
+
+	if (!p->info) {
+		dev_err(&pdev->dev, "failed to obtain device info\n");
+		ret = -ENXIO;
+		goto err1;
+	}
+
 	init_completion(&p->done);
 
 	p->clk = clk_get(&pdev->dev, NULL);
@@ -715,6 +752,17 @@ static int sh_msiof_spi_runtime_nop(struct device *dev)
 	return 0;
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id sh_msiof_match[] = {
+	{ .compatible = "renesas,sh-msiof", },
+	{ .compatible = "renesas,sh-mobile-msiof", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, sh_msiof_match);
+#else
+#define sh_msiof_match NULL
+#endif
+
 static struct dev_pm_ops sh_msiof_spi_dev_pm_ops = {
 	.runtime_suspend = sh_msiof_spi_runtime_nop,
 	.runtime_resume = sh_msiof_spi_runtime_nop,
@@ -727,6 +775,7 @@ static struct platform_driver sh_msiof_spi_drv = {
 		.name		= "spi_sh_msiof",
 		.owner		= THIS_MODULE,
 		.pm		= &sh_msiof_spi_dev_pm_ops,
+		.of_match_table = sh_msiof_match,
 	},
 };
 module_platform_driver(sh_msiof_spi_drv);
diff --git a/include/linux/spi/sh_msiof.h b/include/linux/spi/sh_msiof.h
index 2e8db3d..58bc0e1 100644
--- a/include/linux/spi/sh_msiof.h
+++ b/include/linux/spi/sh_msiof.h
@@ -4,7 +4,7 @@
 struct sh_msiof_spi_info {
 	int tx_fifo_override;
 	int rx_fifo_override;
-	u16 num_chipselect;
+	int num_chipselect;
 };
 
 #endif /* __SPI_SH_MSIOF_H__ */
-- 
1.7.5.4


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[PATCH 4/4] devicetree: Add Renesas SH Mobile MSIOF spi controller binding doc

[Bastian Hecht]

Add binding documentation for Renesas' MSIOF SPI controller.

Signed-off-by: Bastian Hecht <hechtb-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 Documentation/devicetree/bindings/spi/sh-msiof.txt |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/spi/sh-msiof.txt

diff --git a/Documentation/devicetree/bindings/spi/sh-msiof.txt b/Documentation/devicetree/bindings/spi/sh-msiof.txt
new file mode 100644
index 0000000..0d60e04
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/sh-msiof.txt
@@ -0,0 +1,12 @@
+Renesas MSIOF spi controller
+
+Required properties:
+- compatible : 	"renesas,sh-msiof" for SuperH or
+		"renesas,sh-mobile-msiof" for SH Mobile series
+- reg : Offset and length of the register set for the device
+- interrupts : interrupt line used by MSIOF
+
+Optional properties:
+- chip_select  : Chip select, needed if not 0
+- tx_fifo_size : Overrides the default tx fifo size given in words
+- rx_fifo_size : Overrides the default rx fifo size given in words
-- 
1.7.5.4


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[PATCH RESEND 0/4] spi: sh-msiof: Add DT support

[Bastian Hecht]

Patch resend from 21st september, this time cover letter included. Added ARM-ML
and SH-ML as recipients too.

The first patch contains a minor cleanup that becomes possible due to older
changes in the SuperH code.

In the 2nd patch we add the SH-Mobile chips as possible architecture requirement
for the MSIOF driver.

Then we come to the core of the patchset: DeviceTree support for sh-msiof in
patch 3 and patch 4.

There are minimal changes to the first publication to the patchset like changing
a comment string, so I just resend it as v1 again as there are no comments to the
original patchset.

Bastian Hecht (4):
  spi: sh-msiof: Remove unneeded clock name
  spi: Add SH Mobile series as dependency to MSIOF controller
  spi: sh-msiof: Add device tree parsing to driver
  devicetree: Add Renesas SH Mobile MSIOF spi controller binding doc

 Documentation/devicetree/bindings/spi/sh-msiof.txt |   12 ++++
 drivers/spi/Kconfig                                |    4 +-
 drivers/spi/spi-sh-msiof.c                         |   60 ++++++++++++++++++--
 3 files changed, 69 insertions(+), 7 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/spi/sh-msiof.txt

-- 
1.7.5.4

[PATCH 2/4] spi: Add SH Mobile series as dependency to MSIOF controller

[Bastian Hecht]

The MSIOF hardware block is used in the SH Mobile series as well, so we
add it here.

Signed-off-by: Bastian Hecht <hechtb@gmail.com>
---
 drivers/spi/Kconfig |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 1acae35..d0c0ae6 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -341,10 +341,10 @@ config SPI_SC18IS602
 
 config SPI_SH_MSIOF
 	tristate "SuperH MSIOF SPI controller"
-	depends on SUPERH && HAVE_CLK
+	depends on (SUPERH || ARCH_SHMOBILE) && HAVE_CLK
 	select SPI_BITBANG
 	help
-	  SPI driver for SuperH MSIOF blocks.
+	  SPI driver for SuperH and SH Mobile MSIOF blocks.
 
 config SPI_SH
 	tristate "SuperH SPI controller"
-- 
1.7.5.4