[PATCHv3 1/4] ARM: OMAP: AM33xx: Add muxing function for spi0

[PATCHv3 1/4] ARM: OMAP: AM33xx: Add muxing function for spi0

[Teresa Gámez]

Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
---
 arch/arm/mach-omap/am33xx_mux.c              |    5 +++++
 arch/arm/mach-omap/include/mach/am33xx-mux.h |    1 +
 2 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap/am33xx_mux.c b/arch/arm/mach-omap/am33xx_mux.c
index 424d120..abc8586 100644
--- a/arch/arm/mach-omap/am33xx_mux.c
+++ b/arch/arm/mach-omap/am33xx_mux.c
@@ -314,3 +314,8 @@ void am33xx_enable_mmc0_pin_mux(void)
 {
 	configure_module_pin_mux(mmc0_pin_mux);
 }
+
+void am33xx_enable_spi0_pin_mux(void)
+{
+	configure_module_pin_mux(spi0_pin_mux);
+}
diff --git a/arch/arm/mach-omap/include/mach/am33xx-mux.h b/arch/arm/mach-omap/include/mach/am33xx-mux.h
index 44b93bd..d6b19dd 100644
--- a/arch/arm/mach-omap/include/mach/am33xx-mux.h
+++ b/arch/arm/mach-omap/include/mach/am33xx-mux.h
@@ -256,5 +256,6 @@ extern void am33xx_enable_i2c2_pin_mux(void);
 extern void am33xx_enable_uart0_pin_mux(void);
 extern void am33xx_enable_uart2_pin_mux(void);
 extern void am33xx_enable_mmc0_pin_mux(void);
+extern void am33xx_enable_spi0_pin_mux(void);
 
 #endif /*__AM33XX_MUX_H__ */
-- 
1.7.0.4


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[PATCHv3 2/4] omap3_spi: Remove CS check in driver

[Teresa Gámez]

Board file or DT has to take care that the correct
chip select and bus values are used.

Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
---
changes since v3:
	- splitted the former "omap3_spi: Add CS check for AM335x"
	  patch into two
	- removed the SPI check here

 drivers/spi/omap3_spi.c |    9 ---------
 1 files changed, 0 insertions(+), 9 deletions(-)

diff --git a/drivers/spi/omap3_spi.c b/drivers/spi/omap3_spi.c
index e6581df..508e2d9 100644
--- a/drivers/spi/omap3_spi.c
+++ b/drivers/spi/omap3_spi.c
@@ -327,15 +327,6 @@ static int omap3_spi_setup(struct spi_device *spi)
 {
 	struct spi_master *master = spi->master;
 
-	if (((master->bus_num == 1) && (spi->chip_select > 3)) ||
-			((master->bus_num == 2) && (spi->chip_select > 1)) ||
-			((master->bus_num == 3) && (spi->chip_select > 1)) ||
-			((master->bus_num == 4) && (spi->chip_select > 0))) {
-		printf("SPI error: unsupported chip select %i \
-			on bus %i\n", spi->chip_select, master->bus_num);
-		return -EINVAL;
-	}
-
 	if (spi->max_speed_hz > OMAP3_MCSPI_MAX_FREQ) {
 		printf("SPI error: unsupported frequency %i Hz. \
 			Max frequency is 48 Mhz\n", spi->max_speed_hz);
-- 
1.7.0.4


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[PATCHv3 3/4] omap3_spi: Set the correct CS number for AM33xx

[Teresa Gámez]

Changed the number of CS for AM33xx boards to 2.

Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
---
changes since v3:
        - splitted the former "omap3_spi: Add CS check for AM335x"
          patch into two
	- Set correct number of CS here

 drivers/spi/omap3_spi.c |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/omap3_spi.c b/drivers/spi/omap3_spi.c
index 508e2d9..1a92565 100644
--- a/drivers/spi/omap3_spi.c
+++ b/drivers/spi/omap3_spi.c
@@ -359,16 +359,24 @@ static int omap3_spi_probe(struct device_d *dev)
 	 * McSPI3 has 2 CS (bus 3, cs 0 - 1)
 	 * McSPI4 has 1 CS (bus 4, cs 0)
 	 *
+	 * AM335x McSPI has 2 busses with 2 chip selects:
+	 * McSPI0 has 2 CS (bus 0, cs 0 - 1)
+	 * McSPI1 has 2 CS (bus 1, cs 0 - 1)
+	 *
 	 * The board code has to make sure that it does not use
 	 * invalid buses or chip selects.
 	 */
 
 	master->bus_num = dev->id;
-	master->num_chipselect = 4;
+
+	if (IS_ENABLED(CONFIG_ARCH_OMAP3))
+		master->num_chipselect = 4;
+	else
+		master->num_chipselect = 2;
 	master->setup = omap3_spi_setup;
 	master->transfer = omap3_spi_transfer;
 
-	omap3_master->regs = dev_request_mem_region(dev, 0);;
+	omap3_master->regs = dev_request_mem_region(dev, 0);
 
 	spi_reset(master);
 
-- 
1.7.0.4


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[PATCHv3 4/4] ARM: OMAP: pcm051: Add spi flash support

[Teresa Gámez]

Add support for w25q64 SPI NOR flash.

Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
---
changes since v2: 
	- changed partition size to 512kb
	- added spi-nor boot option

 arch/arm/boards/pcm051/board.c               |   41 ++++++++++++++++++++++++++
 arch/arm/boards/pcm051/env/boot/spi-nor      |   12 +++++++
 arch/arm/boards/pcm051/env/init/mtdparts-nor |   12 +++++++
 arch/arm/configs/pcm051_defconfig            |    3 +-
 4 files changed, 67 insertions(+), 1 deletions(-)
 create mode 100644 arch/arm/boards/pcm051/env/boot/spi-nor
 create mode 100644 arch/arm/boards/pcm051/env/init/mtdparts-nor

diff --git a/arch/arm/boards/pcm051/board.c b/arch/arm/boards/pcm051/board.c
index 8754ba5..f0eaa01 100644
--- a/arch/arm/boards/pcm051/board.c
+++ b/arch/arm/boards/pcm051/board.c
@@ -26,6 +26,8 @@
 #include <mach/am33xx-devices.h>
 #include <mach/am33xx-mux.h>
 #include <mach/am33xx-silicon.h>
+#include <spi/spi.h>
+#include <spi/flash.h>
 
 #include "mux.h"
 
@@ -52,12 +54,51 @@ static int pcm051_mem_init(void)
 }
 mem_initcall(pcm051_mem_init);
 
+static struct flash_platform_data pcm051_spi_flash = {
+	.name	= "nor",
+	.type	= "w25q64",
+};
+
+/*
+* SPI Flash works at 80Mhz however the SPI controller runs with 48MHz.
+* So setup Max speed to be less than the controller speed.
+*/
+static struct spi_board_info pcm051_spi_board_info[] = {
+	{
+		.name		= "m25p80",
+		.platform_data	= &pcm051_spi_flash,
+		.max_speed_hz	= 24000000,
+		.bus_num	= 0,
+		.chip_select	= 0,
+	},
+};
+
+static void pcm051_spi_init(void)
+{
+	int ret;
+
+	am33xx_enable_spi0_pin_mux();
+
+	ret = spi_register_board_info(pcm051_spi_board_info,
+					ARRAY_SIZE(pcm051_spi_board_info));
+	am33xx_add_spi0();
+}
+
 static int pcm051_devices_init(void)
 {
 	pcm051_enable_mmc0_pin_mux();
 
 	am33xx_add_mmc0(NULL);
 
+	pcm051_spi_init();
+
+	devfs_add_partition("nor0", 0x00000, SZ_128K,
+					DEVFS_PARTITION_FIXED, "xload");
+	devfs_add_partition("nor0", SZ_128K, SZ_512K,
+					DEVFS_PARTITION_FIXED, "self0");
+	devfs_add_partition("nor0", SZ_128K + SZ_512K, SZ_128K,
+					DEVFS_PARTITION_FIXED, "env0");
+
 	armlinux_set_bootparams((void *)(AM33XX_DRAM_ADDR_SPACE_START + 0x100));
 	armlinux_set_architecture(MACH_TYPE_PCM051);
 
diff --git a/arch/arm/boards/pcm051/env/boot/spi-nor b/arch/arm/boards/pcm051/env/boot/spi-nor
new file mode 100644
index 0000000..d5f77c8
--- /dev/null
+++ b/arch/arm/boards/pcm051/env/boot/spi-nor
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+if [ "$1" = menu ]; then
+        boot-menu-add-entry "$0" "SPI NOR Flash"
+        exit
+fi
+
+global.bootm.image="/dev/nor0.kernel"
+
+# Use rootfs form SD-Card for now as rootfs partition < 4MB
+global.linux.bootargs.dyn.root="root=/dev/mmcblk0p2 rootfstype=ext3 rootwait"
+
diff --git a/arch/arm/boards/pcm051/env/init/mtdparts-nor b/arch/arm/boards/pcm051/env/init/mtdparts-nor
new file mode 100644
index 0000000..91aa847
--- /dev/null
+++ b/arch/arm/boards/pcm051/env/init/mtdparts-nor
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+if [ "$1" = menu ]; then
+	init-menu-add-entry "$0" "NOR partitions"
+	exit
+fi
+
+mtdparts="128k(nor0.xload),512k(nor0.barebox),128k(nor0.bareboxenv),4M(nor0.kernel),-(nor0.root)"
+kernelname="spi_flash"
+
+mtdparts-add -d nor0 -k ${kernelname} -p ${mtdparts}
+
diff --git a/arch/arm/configs/pcm051_defconfig b/arch/arm/configs/pcm051_defconfig
index 4da0ed4..90c2b50 100644
--- a/arch/arm/configs/pcm051_defconfig
+++ b/arch/arm/configs/pcm051_defconfig
@@ -44,8 +44,9 @@ CONFIG_CMD_GPIO=y
 CONFIG_CMD_UNCOMPRESS=y
 CONFIG_DRIVER_SERIAL_NS16550=y
 CONFIG_DRIVER_SERIAL_NS16550_OMAP_EXTENSIONS=y
-# CONFIG_SPI is not set
+CONFIG_DRIVER_SPI_OMAP3=y
 CONFIG_MTD=y
+CONFIG_MTD_M25P80=y
 CONFIG_NAND=y
 CONFIG_USB=y
 CONFIG_MCI=y
-- 
1.7.0.4


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Re: [PATCHv3 1/4] ARM: OMAP: AM33xx: Add muxing function for spi0

[Sascha Hauer]

On Wed, Jun 19, 2013 at 09:09:42AM +0200, Teresa Gámez wrote:
> Signed-off-by: Teresa Gámez <t.gamez@phytec.de>

Applied all, 

Thanks
 Sascha

> ---
>  arch/arm/mach-omap/am33xx_mux.c              |    5 +++++
>  arch/arm/mach-omap/include/mach/am33xx-mux.h |    1 +
>  2 files changed, 6 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/mach-omap/am33xx_mux.c b/arch/arm/mach-omap/am33xx_mux.c
> index 424d120..abc8586 100644
> --- a/arch/arm/mach-omap/am33xx_mux.c
> +++ b/arch/arm/mach-omap/am33xx_mux.c
> @@ -314,3 +314,8 @@ void am33xx_enable_mmc0_pin_mux(void)
>  {
>  	configure_module_pin_mux(mmc0_pin_mux);
>  }
> +
> +void am33xx_enable_spi0_pin_mux(void)
> +{
> +	configure_module_pin_mux(spi0_pin_mux);
> +}
> diff --git a/arch/arm/mach-omap/include/mach/am33xx-mux.h b/arch/arm/mach-omap/include/mach/am33xx-mux.h
> index 44b93bd..d6b19dd 100644
> --- a/arch/arm/mach-omap/include/mach/am33xx-mux.h
> +++ b/arch/arm/mach-omap/include/mach/am33xx-mux.h
> @@ -256,5 +256,6 @@ extern void am33xx_enable_i2c2_pin_mux(void);
>  extern void am33xx_enable_uart0_pin_mux(void);
>  extern void am33xx_enable_uart2_pin_mux(void);
>  extern void am33xx_enable_mmc0_pin_mux(void);
> +extern void am33xx_enable_spi0_pin_mux(void);
>  
>  #endif /*__AM33XX_MUX_H__ */
> -- 
> 1.7.0.4
> 
> 
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