From: Jonas Gorski <jonas.gorski-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
Florian Fainelli
<f.fainelli-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
bcm-kernel-feedback-list-dY08KVG/lbpWk0Htik3J/w@public.gmane.org
Subject: [PATCH 3/3] spi/bcm63xx-hsspi: allow for probing through devicetree
Date: Wed, 22 Feb 2017 14:19:40 +0100 [thread overview]
Message-ID: <20170222131940.31085-3-jonas.gorski@gmail.com> (raw)
In-Reply-To: <20170222131940.31085-1-jonas.gorski-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Add required binding support to probe through device tree.
Signed-off-by: Jonas Gorski <jonas.gorski-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
drivers/spi/spi-bcm63xx-hsspi.c | 26 +++++++++++++++++++++++---
1 file changed, 23 insertions(+), 3 deletions(-)
diff --git a/drivers/spi/spi-bcm63xx-hsspi.c b/drivers/spi/spi-bcm63xx-hsspi.c
index 79096d17ebde..77c249a22c9b 100644
--- 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 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 +384,20 @@ 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;
+ if (dev->of_node) {
+ master->dev.of_node = dev->of_node;
+
+ 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;
+ }
+ } else {
+ master->bus_num = HSSPI_BUS_NUM;
+ }
+
+ 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 +483,16 @@ 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,
--
2.11.0
--
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next prev parent reply other threads:[~2017-02-22 13:19 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-22 13:19 [PATCH 1/3] spi/bcm63xx-hsspi: allow providing clock rate through a second clock Jonas Gorski
[not found] ` <20170222131940.31085-1-jonas.gorski-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-02-22 13:19 ` [PATCH 2/3] dt-bindings: spi: document bcm63xx HS SPI devicetree bindings Jonas Gorski
[not found] ` <20170222131940.31085-2-jonas.gorski-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-02-27 22:41 ` Rob Herring
2017-02-27 22:49 ` Florian Fainelli
[not found] ` <c21aadc6-cbcf-4948-0e40-b8aae0304430-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-02-28 13:11 ` Jonas Gorski
2017-02-22 13:19 ` Jonas Gorski [this message]
[not found] ` <20170222131940.31085-3-jonas.gorski-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-02-27 22:54 ` [PATCH 3/3] spi/bcm63xx-hsspi: allow for probing through devicetree Florian Fainelli
[not found] ` <75499273-96ba-0270-9b06-5b1def1452ca-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-02-28 13:17 ` Jonas Gorski
2017-02-22 18:26 ` [PATCH 1/3] spi/bcm63xx-hsspi: allow providing clock rate through a second clock Mark Brown
[not found] ` <20170222182602.p4wlcjfkxx6ulj4x-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2017-02-22 20:00 ` Jonas Gorski
[not found] ` <CAOiHx=m_bnm+PXYVxtbxzKFqLtjKhi20TONX4UTUWrmMNpWcUg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-02-27 22:48 ` Florian Fainelli
2017-03-13 16:57 ` Applied "spi/bcm63xx-hsspi: allow providing clock rate through a second clock" to the spi tree Mark Brown
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