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spi/bcm63xx-hsspi: allow for probing through devicetree

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Add required binding support to probe through device tree.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jonas Gorski 2017-03-01 10:08:14 +01:00 committed by Mark Brown
parent 8c0951afd8
commit 7ab2463550
1 changed files with 20 additions and 3 deletions
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23
drivers/spi/spi-bcm63xx-hsspi.c
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@ -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 platform_device *pdev)
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 platform_device *pdev)
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 device *dev)
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,