You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
76 lines
2.3 KiB
76 lines
2.3 KiB
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,
|
|
|