Initial

2 files changed, 62 insertions, 0 deletions

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..5e23f84
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,15 @@
+obj-m := simple-mfd-spi.o
+obj-m += cds9k-gpio.o
+
+SRC := $(shell pwd)
+
+all:
+	$(MAKE) -C $(KERNEL_SRC) M=$(SRC)
+
+clean:
+	rm -f *.o core .depend .*.cmd *.ko *.mod.c
+	rm -f Module.markers Module.symvers modules.order
+	rm -rf .tmp_versions Modules.symvers
+
+modules_install:
+	$(MAKE) -C $(KERNEL_SRC) M=$(SRC) modules_install
diff --git a/simple-mfd-spi.c b/simple-mfd-spi.c
new file mode 100644
index 0000000..e63dc24
--- /dev/null
+++ b/simple-mfd-spi.c
@@ -0,0 +1,47 @@
+#include <linux/spi/spi.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/regmap.h>
+
+static const struct regmap_config simple_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static int david_cds9k_probe(struct spi_device *spi)
+{
+	const struct regmap_config *config;
+	struct regmap *regmap;
+
+	printk("Bing bong\n");
+
+	config = device_get_match_data(&spi->dev);
+	if (!config)
+		config = &simple_regmap_config;
+
+	regmap = devm_regmap_init_spi(spi, config);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	return devm_of_platform_populate(&spi->dev);
+}
+
+
+static const struct of_device_id david_cds9k_of_match[] = {
+	{ .compatible = "david,cds9k" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, david_cds9k_of_match);
+
+static struct spi_driver david_cds9k_spi_driver = {
+	.probe = david_cds9k_probe,
+	.driver = {
+		.name = "david_cds9k",
+		.of_match_table = david_cds9k_of_match,
+	},
+};
+module_spi_driver(david_cds9k_spi_driver);
+
+MODULE_AUTHOR("David Phillips <david@yeah.nah.nz>");
+MODULE_DESCRIPTION("MFD driver for the CDS9K board controller");
+MODULE_LICENSE("GPL v2");