[ARM] S3C24XX: Default SPI pin configuration for SPI

Add a set of default pin configuration routines for
setting up the SPI gpio configuration when using the
hardware SPI driver.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

5 files changed, 105 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c2410/include/mach/spi.h b/arch/arm/mach-s3c2410/include/mach/spi.h
index 46d46f5b99f2..774f3adfe8ad 100644
--- a/arch/arm/mach-s3c2410/include/mach/spi.h
+++ b/arch/arm/mach-s3c2410/include/mach/spi.h
@@ -22,5 +22,12 @@ struct s3c2410_spi_info {
         void (*set_cs)(struct s3c2410_spi_info *spi, int cs, int pol);
 };
 
+/* Standard setup / suspend routines for SPI GPIO pins. */
+
+extern void s3c24xx_spi_gpiocfg_bus0_gpe11_12_13(struct s3c2410_spi_info *spi,
+                                                 int enable);
+
+extern void s3c24xx_spi_gpiocfg_bus1_gpg5_6_7(struct s3c2410_spi_info *spi,
+                                              int enable);
 
 #endif /* __ASM_ARCH_SPI_H */
diff --git a/arch/arm/plat-s3c24xx/Kconfig b/arch/arm/plat-s3c24xx/Kconfig
index 0af3872fb763..48ebf355a45c 100644
--- a/arch/arm/plat-s3c24xx/Kconfig
+++ b/arch/arm/plat-s3c24xx/Kconfig
@@ -49,6 +49,22 @@ config S3C2410_DMA_DEBUG
           Enable debugging output for the DMA code. This option sends info
           to the kernel log, at priority KERN_DEBUG.
 
+# SPI default pin configuration code
+
+config S3C24XX_SPI_BUS0_GPE11_GPE12_GPE13
+        bool
+        help
+          SPI GPIO configuration code for BUS0 when connected to
+          GPE11, GPE12 and GPE13.
+
+config S3C24XX_SPI_BUS1_GPG5_GPG6_GPG7
+        bool
+        help
+          SPI GPIO configuration code for BUS 1 when connected to
+          GPG5, GPG6 and GPG7.
+
+# common code for s3c24xx based machines, such as the SMDKs.
+
 config MACH_SMDK
         bool
         help
diff --git a/arch/arm/plat-s3c24xx/Makefile b/arch/arm/plat-s3c24xx/Makefile
index d82767b2b833..6b574016dc44 100644
--- a/arch/arm/plat-s3c24xx/Makefile
+++ b/arch/arm/plat-s3c24xx/Makefile
@@ -31,4 +31,12 @@ obj-$(CONFIG_PM)		+= pm.o
 obj-$(CONFIG_PM)                += sleep.o
 obj-$(CONFIG_HAVE_PWM)          += pwm.o
 obj-$(CONFIG_S3C2410_DMA)       += dma.o
+
+# SPI gpio central GPIO functions
+
+obj-$(CONFIG_S3C24XX_SPI_BUS0_GPE11_GPE12_GPE13) += spi-bus0-gpe11_12_13.o
+obj-$(CONFIG_S3C24XX_SPI_BUS1_GPG5_GPG6_GPG7)    += spi-bus1-gpg5_6_7.o
+
+# machine common support
+
 obj-$(CONFIG_MACH_SMDK)         += common-smdk.o
diff --git a/arch/arm/plat-s3c24xx/spi-bus0-gpe11_12_13.c b/arch/arm/plat-s3c24xx/spi-bus0-gpe11_12_13.c
new file mode 100644
index 000000000000..8b403cbb53d2
--- /dev/null
+++ b/arch/arm/plat-s3c24xx/spi-bus0-gpe11_12_13.c
@@ -0,0 +1,37 @@
+/* linux/arch/arm/plat-s3c24xx/spi-bus0-gpe11_12_13.c
+ *
+ * Copyright (c) 2008 Simtec Electronics
+ *      http://armlinux.simtec.co.uk/
+ *      Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C24XX SPI - gpio configuration for bus 0 on gpe11,12,13
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License.
+*/
+
+#include <linux/kernel.h>
+
+#include <mach/hardware.h>
+
+#include <mach/spi.h>
+#include <mach/regs-gpio.h>
+
+void s3c24xx_spi_gpiocfg_bus0_gpe11_12_13(struct s3c2410_spi_info *spi,
+                                          int enable)
+{
+        if (enable) {
+                s3c2410_gpio_cfgpin(S3C2410_GPE13, S3C2410_GPE13_SPICLK0);
+                s3c2410_gpio_cfgpin(S3C2410_GPE12, S3C2410_GPE12_SPIMOSI0);
+                s3c2410_gpio_cfgpin(S3C2410_GPE11, S3C2410_GPE11_SPIMISO0);
+                s3c2410_gpio_pullup(S3C2410_GPE11, 0);
+                s3c2410_gpio_pullup(S3C2410_GPE13, 0);
+        } else {
+                s3c2410_gpio_cfgpin(S3C2410_GPE13, S3C2410_GPIO_INPUT);
+                s3c2410_gpio_cfgpin(S3C2410_GPE11, S3C2410_GPIO_INPUT);
+                s3c2410_gpio_pullup(S3C2410_GPE11, 1);
+                s3c2410_gpio_pullup(S3C2410_GPE12, 1);
+                s3c2410_gpio_pullup(S3C2410_GPE13, 1);
+        }
+}
diff --git a/arch/arm/plat-s3c24xx/spi-bus1-gpg5_6_7.c b/arch/arm/plat-s3c24xx/spi-bus1-gpg5_6_7.c
new file mode 100644
index 000000000000..8fccd4e549f0
--- /dev/null
+++ b/arch/arm/plat-s3c24xx/spi-bus1-gpg5_6_7.c
@@ -0,0 +1,37 @@
+/* linux/arch/arm/plat-s3c24xx/spi-bus0-gpg5_6_7.c
+ *
+ * Copyright (c) 2008 Simtec Electronics
+ *      http://armlinux.simtec.co.uk/
+ *      Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C24XX SPI - gpio configuration for bus 1 on gpg5,6,7
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License.
+*/
+
+#include <linux/kernel.h>
+
+#include <mach/hardware.h>
+
+#include <mach/spi.h>
+#include <mach/regs-gpio.h>
+
+void s3c24xx_spi_gpiocfg_bus1_gpg5_6_7(struct s3c2410_spi_info *spi,
+                                       int enable)
+{
+        if (enable) {
+                s3c2410_gpio_cfgpin(S3C2410_GPG7, S3C2410_GPG7_SPICLK1);
+                s3c2410_gpio_cfgpin(S3C2410_GPG6, S3C2410_GPG6_SPIMOSI1);
+                s3c2410_gpio_cfgpin(S3C2410_GPG5, S3C2410_GPG5_SPIMISO1);
+                s3c2410_gpio_pullup(S3C2410_GPG5, 0);
+                s3c2410_gpio_pullup(S3C2410_GPG6, 0);
+        } else {
+                s3c2410_gpio_cfgpin(S3C2410_GPG7, S3C2410_GPIO_INPUT);
+                s3c2410_gpio_cfgpin(S3C2410_GPG5, S3C2410_GPIO_INPUT);
+                s3c2410_gpio_pullup(S3C2410_GPG5, 1);
+                s3c2410_gpio_pullup(S3C2410_GPG6, 1);
+                s3c2410_gpio_pullup(S3C2410_GPG7, 1);
+        }
+}