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-rw-r--r--Documentation/devicetree/bindings/spi/efm32-spi.txt13
-rw-r--r--Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt28
-rw-r--r--drivers/spi/spi-dw-mmio.c19
-rw-r--r--drivers/spi/spi-efm32.c8
-rw-r--r--drivers/spi/spi-fsl-lib.c2
-rw-r--r--drivers/spi/spi-omap-uwire.c11
6 files changed, 65 insertions, 16 deletions
diff --git a/Documentation/devicetree/bindings/spi/efm32-spi.txt b/Documentation/devicetree/bindings/spi/efm32-spi.txt
index 130cd17e3680..750e29aff9bc 100644
--- a/Documentation/devicetree/bindings/spi/efm32-spi.txt
+++ b/Documentation/devicetree/bindings/spi/efm32-spi.txt
@@ -10,11 +10,12 @@ Required properties:
- cs-gpios: see spi-bus.txt
Recommended properties :
-- efm32,location: Value to write to the ROUTE register's LOCATION bitfield to
- configure the pinmux for the device, see datasheet for values.
- If "efm32,location" property is not provided, keeping what is
- already configured in the hardware, so its either the reset
- default 0 or whatever the bootloader did.
+- energymicro,location: Value to write to the ROUTE register's LOCATION
+ bitfield to configure the pinmux for the device, see
+ datasheet for values.
+ If this property is not provided, keeping what is
+ already configured in the hardware, so its either the
+ reset default 0 or whatever the bootloader did.
Example:
@@ -26,7 +27,7 @@ spi1: spi@0x4000c400 { /* USART1 */
interrupts = <15 16>;
clocks = <&cmu 20>;
cs-gpios = <&gpio 51 1>; // D3
- efm32,location = <1>;
+ energymicro,location = <1>;
status = "ok";
ks8851@0 {
diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt
new file mode 100644
index 000000000000..bd99193e87b9
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt
@@ -0,0 +1,28 @@
+Synopsys DesignWare AMBA 2.0 Synchronous Serial Interface.
+
+Required properties:
+- compatible : "snps,dw-apb-ssi"
+- reg : The register base for the controller.
+- interrupts : One interrupt, used by the controller.
+- #address-cells : <1>, as required by generic SPI binding.
+- #size-cells : <0>, also as required by generic SPI binding.
+
+Optional properties:
+- cs-gpios : Specifies the gpio pis to be used for chipselects.
+- num-cs : The number of chipselects. If omitted, this will default to 4.
+
+Child nodes as per the generic SPI binding.
+
+Example:
+
+ spi@fff00000 {
+ compatible = "snps,dw-apb-ssi";
+ reg = <0xfff00000 0x1000>;
+ interrupts = <0 154 4>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ num-cs = <2>;
+ cs-gpios = <&gpio0 13 0>,
+ <&gpio0 14 0>;
+ };
+
diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c
index a5cba14ac3d2..21ce0e36fa00 100644
--- a/drivers/spi/spi-dw-mmio.c
+++ b/drivers/spi/spi-dw-mmio.c
@@ -16,7 +16,9 @@
#include <linux/spi/spi.h>
#include <linux/scatterlist.h>
#include <linux/module.h>
+#include <linux/of.h>
#include <linux/of_gpio.h>
+#include <linux/of_platform.h>
#include "spi-dw.h"
@@ -33,6 +35,7 @@ static int dw_spi_mmio_probe(struct platform_device *pdev)
struct dw_spi *dws;
struct resource *mem;
int ret;
+ int num_cs;
dwsmmio = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_mmio),
GFP_KERNEL);
@@ -68,9 +71,16 @@ static int dw_spi_mmio_probe(struct platform_device *pdev)
return ret;
dws->bus_num = pdev->id;
- dws->num_cs = 4;
+
dws->max_freq = clk_get_rate(dwsmmio->clk);
+ num_cs = 4;
+
+ if (pdev->dev.of_node)
+ of_property_read_u32(pdev->dev.of_node, "num-cs", &num_cs);
+
+ dws->num_cs = num_cs;
+
if (pdev->dev.of_node) {
int i;
@@ -114,12 +124,19 @@ static int dw_spi_mmio_remove(struct platform_device *pdev)
return 0;
}
+static const struct of_device_id dw_spi_mmio_of_match[] = {
+ { .compatible = "snps,dw-apb-ssi", },
+ { /* end of table */}
+};
+MODULE_DEVICE_TABLE(of, dw_spi_mmio_of_match);
+
static struct platform_driver dw_spi_mmio_driver = {
.probe = dw_spi_mmio_probe,
.remove = dw_spi_mmio_remove,
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
+ .of_match_table = dw_spi_mmio_of_match,
},
};
module_platform_driver(dw_spi_mmio_driver);
diff --git a/drivers/spi/spi-efm32.c b/drivers/spi/spi-efm32.c
index be44a3eeb5e8..6caeb1cac0f3 100644
--- a/drivers/spi/spi-efm32.c
+++ b/drivers/spi/spi-efm32.c
@@ -294,10 +294,16 @@ static void efm32_spi_probe_dt(struct platform_device *pdev,
u32 location;
int ret;
- ret = of_property_read_u32(np, "efm32,location", &location);
+ ret = of_property_read_u32(np, "energymicro,location", &location);
+
+ if (ret)
+ /* fall back to wrongly namespaced property */
+ ret = of_property_read_u32(np, "efm32,location", &location);
+
if (ret)
/* fall back to old and (wrongly) generic property "location" */
ret = of_property_read_u32(np, "location", &location);
+
if (!ret) {
dev_dbg(&pdev->dev, "using location %u\n", location);
} else {
diff --git a/drivers/spi/spi-fsl-lib.c b/drivers/spi/spi-fsl-lib.c
index 95212ea96c8d..e0b773fc29cb 100644
--- a/drivers/spi/spi-fsl-lib.c
+++ b/drivers/spi/spi-fsl-lib.c
@@ -196,7 +196,7 @@ int of_mpc8xxx_spi_probe(struct platform_device *ofdev)
pinfo = devm_kzalloc(&ofdev->dev, sizeof(*pinfo), GFP_KERNEL);
if (!pinfo)
- return -ENOMEM;
+ return ret;
pdata = &pinfo->pdata;
dev->platform_data = pdata;
diff --git a/drivers/spi/spi-omap-uwire.c b/drivers/spi/spi-omap-uwire.c
index 0f5a0aa3b871..8bca90a19dd1 100644
--- a/drivers/spi/spi-omap-uwire.c
+++ b/drivers/spi/spi-omap-uwire.c
@@ -41,14 +41,15 @@
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/slab.h>
+#include <linux/device.h>
#include <linux/spi/spi.h>
#include <linux/spi/spi_bitbang.h>
#include <linux/module.h>
+#include <linux/io.h>
#include <asm/irq.h>
#include <mach/hardware.h>
-#include <asm/io.h>
#include <asm/mach-types.h>
#include <mach/mux.h>
@@ -447,7 +448,6 @@ static void uwire_off(struct uwire_spi *uwire)
{
uwire_write_reg(UWIRE_SR3, 0);
clk_disable(uwire->ck);
- clk_put(uwire->ck);
spi_master_put(uwire->bitbang.master);
}
@@ -463,7 +463,7 @@ static int uwire_probe(struct platform_device *pdev)
uwire = spi_master_get_devdata(master);
- uwire_base = ioremap(UWIRE_BASE_PHYS, UWIRE_IO_SIZE);
+ uwire_base = devm_ioremap(&pdev->dev, UWIRE_BASE_PHYS, UWIRE_IO_SIZE);
if (!uwire_base) {
dev_dbg(&pdev->dev, "can't ioremap UWIRE\n");
spi_master_put(master);
@@ -472,12 +472,11 @@ static int uwire_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, uwire);
- uwire->ck = clk_get(&pdev->dev, "fck");
+ uwire->ck = devm_clk_get(&pdev->dev, "fck");
if (IS_ERR(uwire->ck)) {
status = PTR_ERR(uwire->ck);
dev_dbg(&pdev->dev, "no functional clock?\n");
spi_master_put(master);
- iounmap(uwire_base);
return status;
}
clk_enable(uwire->ck);
@@ -507,7 +506,6 @@ static int uwire_probe(struct platform_device *pdev)
status = spi_bitbang_start(&uwire->bitbang);
if (status < 0) {
uwire_off(uwire);
- iounmap(uwire_base);
}
return status;
}
@@ -520,7 +518,6 @@ static int uwire_remove(struct platform_device *pdev)
spi_bitbang_stop(&uwire->bitbang);
uwire_off(uwire);
- iounmap(uwire_base);
return 0;
}
generated by cgit v1.2.3 (git 2.0.4) at 2025-01-08 05:35:31 +0000