brcm63xx: register SPI controllers through DT

Register SPI controllers through device tree. We will wire up the clocks
at a later stage.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/target/linux/brcm63xx/patches-4.4/001-4.12-06-spi-bcm63xx-hsspi-add-support-for-probing-through-de.patch b/target/linux/brcm63xx/patches-4.4/001-4.12-06-spi-bcm63xx-hsspi-add-support-for-probing-through-de.patch
new file mode 100644
index 0000000..aaf4a59
--- /dev/null
+++ b/target/linux/brcm63xx/patches-4.4/001-4.12-06-spi-bcm63xx-hsspi-add-support-for-probing-through-de.patch
@@ -0,0 +1,76 @@
+From 776041498c2b285a7f745c924e10fc11ef720eae Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jonas.gorski@gmail.com>
+Date: Thu, 10 Sep 2015 14:53:53 +0200
+Subject: [PATCH 3/3] spi/bcm63xx-hsspi: allow for probing through devicetree
+
+Add required binding support to probe through device tree.
+
+Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
+---
+ drivers/spi/spi-bcm63xx-hsspi.c | 23 ++++++++++++++++++++---
+ 1 file changed, 20 insertions(+), 3 deletions(-)
+
+--- a/drivers/spi/spi-bcm63xx-hsspi.c
++++ b/drivers/spi/spi-bcm63xx-hsspi.c
+@@ -19,6 +19,7 @@
+ #include <linux/interrupt.h>
+ #include <linux/spi/spi.h>
+ #include <linux/mutex.h>
++#include <linux/of.h>
+ 
+ #define HSSPI_GLOBAL_CTRL_REG			0x0
+ #define GLOBAL_CTRL_CS_POLARITY_SHIFT		0
+@@ -91,6 +92,7 @@
+ 
+ #define HSSPI_MAX_SYNC_CLOCK			30000000
+ 
++#define HSSPI_SPI_MAX_CS			8
+ #define HSSPI_BUS_NUM				1 /* 0 is legacy SPI */
+ 
+ struct bcm63xx_hsspi {
+@@ -332,7 +334,7 @@ static int bcm63xx_hsspi_probe(struct pl
+ 	struct device *dev = &pdev->dev;
+ 	struct clk *clk;
+ 	int irq, ret;
+-	u32 reg, rate;
++	u32 reg, rate, num_cs = HSSPI_SPI_MAX_CS;
+ 
+ 	irq = platform_get_irq(pdev, 0);
+ 	if (irq < 0) {
+@@ -382,8 +384,17 @@ static int bcm63xx_hsspi_probe(struct pl
+ 	mutex_init(&bs->bus_mutex);
+ 	init_completion(&bs->done);
+ 
+-	master->bus_num = HSSPI_BUS_NUM;
+-	master->num_chipselect = 8;
++	master->dev.of_node = dev->of_node;
++	if (!dev->of_node)
++		master->bus_num = HSSPI_BUS_NUM;
++
++	of_property_read_u32(dev->of_node, "num-cs", &num_cs);
++	if (num_cs > 8) {
++		dev_warn(dev, "unsupported number of cs (%i), reducing to 8\n",
++			 num_cs);
++		num_cs = HSSPI_SPI_MAX_CS;
++	}
++	master->num_chipselect = num_cs;
+ 	master->setup = bcm63xx_hsspi_setup;
+ 	master->transfer_one_message = bcm63xx_hsspi_transfer_one;
+ 	master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH |
+@@ -469,10 +480,16 @@ static int bcm63xx_hsspi_resume(struct d
+ static SIMPLE_DEV_PM_OPS(bcm63xx_hsspi_pm_ops, bcm63xx_hsspi_suspend,
+ 			 bcm63xx_hsspi_resume);
+ 
++static const struct of_device_id bcm63xx_hsspi_of_match[] = {
++	{ .compatible = "brcm,bcm6328-hsspi", },
++	{ },
++};
++
+ static struct platform_driver bcm63xx_hsspi_driver = {
+ 	.driver = {
+ 		.name	= "bcm63xx-hsspi",
+ 		.pm	= &bcm63xx_hsspi_pm_ops,
++		.of_match_table = bcm63xx_hsspi_of_match,
+ 	},
+ 	.probe		= bcm63xx_hsspi_probe,
+ 	.remove		= bcm63xx_hsspi_remove,