mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-27 09:12:39 +00:00
200 lines
5.1 KiB
Diff
200 lines
5.1 KiB
Diff
From 5de6baef9b5d9e3a84e0c3752cfb7eaef2eb1a0f Mon Sep 17 00:00:00 2001
|
|
From: notro <notro@tronnes.org>
|
|
Date: Sun, 27 Jul 2014 20:12:58 +0200
|
|
Subject: [PATCH 052/114] spi: bcm2708: add device tree support
|
|
|
|
Add DT support to driver and add to .dtsi file.
|
|
Setup pins and spidev in .dts file.
|
|
SPI is disabled by default.
|
|
|
|
Signed-off-by: Noralf Tronnes <notro@tronnes.org>
|
|
|
|
BCM2708: don't register SPI controller when using DT
|
|
|
|
The device for the SPI controller is in the Device Tree.
|
|
Only register the device when not using DT.
|
|
|
|
Signed-off-by: Noralf Tronnes <notro@tronnes.org>
|
|
|
|
spi: bcm2835: make driver available on ARCH_BCM2708
|
|
|
|
Make this driver available on ARCH_BCM2708
|
|
|
|
Signed-off-by: Noralf Tronnes <notro@tronnes.org>
|
|
|
|
bcm2708: Remove the prohibition on mixing SPIDEV and DT
|
|
---
|
|
arch/arm/boot/dts/bcm2708-rpi-b.dts | 32 ++++++++++++++++++++++++++++++++
|
|
arch/arm/boot/dts/bcm2708.dtsi | 18 ++++++++++++++++++
|
|
arch/arm/mach-bcm2708/bcm2708.c | 19 ++++++++++++++++---
|
|
drivers/spi/Kconfig | 2 +-
|
|
drivers/spi/spi-bcm2708.c | 8 ++++++++
|
|
5 files changed, 75 insertions(+), 4 deletions(-)
|
|
|
|
--- a/arch/arm/boot/dts/bcm2708-rpi-b.dts
|
|
+++ b/arch/arm/boot/dts/bcm2708-rpi-b.dts
|
|
@@ -5,4 +5,36 @@
|
|
/ {
|
|
compatible = "brcm,bcm2708";
|
|
model = "Raspberry Pi";
|
|
+
|
|
+ aliases {
|
|
+ spi0 = &spi0;
|
|
+ };
|
|
+};
|
|
+
|
|
+&gpio {
|
|
+ spi0_pins: spi0_pins {
|
|
+ brcm,pins = <7 8 9 10 11>;
|
|
+ brcm,function = <4>; /* alt0 */
|
|
+ };
|
|
+};
|
|
+
|
|
+&spi0 {
|
|
+ pinctrl-names = "default";
|
|
+ pinctrl-0 = <&spi0_pins>;
|
|
+
|
|
+ spidev@0{
|
|
+ compatible = "spidev";
|
|
+ reg = <0>; /* CE0 */
|
|
+ #address-cells = <1>;
|
|
+ #size-cells = <0>;
|
|
+ spi-max-frequency = <500000>;
|
|
+ };
|
|
+
|
|
+ spidev@1{
|
|
+ compatible = "spidev";
|
|
+ reg = <1>; /* CE1 */
|
|
+ #address-cells = <1>;
|
|
+ #size-cells = <0>;
|
|
+ spi-max-frequency = <500000>;
|
|
+ };
|
|
};
|
|
--- a/arch/arm/boot/dts/bcm2708.dtsi
|
|
+++ b/arch/arm/boot/dts/bcm2708.dtsi
|
|
@@ -38,11 +38,29 @@
|
|
interrupt-controller;
|
|
#interrupt-cells = <2>;
|
|
};
|
|
+
|
|
+ spi0: spi@7e204000 {
|
|
+ compatible = "brcm,bcm2708-spi";
|
|
+ reg = <0x7e204000 0x1000>;
|
|
+ interrupts = <2 22>;
|
|
+ clocks = <&clk_spi>;
|
|
+ #address-cells = <1>;
|
|
+ #size-cells = <0>;
|
|
+ status = "disabled";
|
|
+ };
|
|
};
|
|
|
|
clocks {
|
|
compatible = "simple-bus";
|
|
#address-cells = <1>;
|
|
#size-cells = <0>;
|
|
+
|
|
+ clk_spi: clock@2 {
|
|
+ compatible = "fixed-clock";
|
|
+ reg = <2>;
|
|
+ #clock-cells = <0>;
|
|
+ clock-output-names = "spi";
|
|
+ clock-frequency = <250000000>;
|
|
+ };
|
|
};
|
|
};
|
|
--- a/arch/arm/mach-bcm2708/bcm2708.c
|
|
+++ b/arch/arm/mach-bcm2708/bcm2708.c
|
|
@@ -486,6 +486,7 @@ static struct platform_device bcm2708_al
|
|
},
|
|
};
|
|
|
|
+#ifndef CONFIG_OF
|
|
static struct resource bcm2708_spi_resources[] = {
|
|
{
|
|
.start = SPI0_BASE,
|
|
@@ -509,6 +510,7 @@ static struct platform_device bcm2708_sp
|
|
.dma_mask = &bcm2708_spi_dmamask,
|
|
.coherent_dma_mask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON)},
|
|
};
|
|
+#endif
|
|
|
|
#ifdef CONFIG_BCM2708_SPIDEV
|
|
static struct spi_board_info bcm2708_spi_devices[] = {
|
|
@@ -670,6 +672,16 @@ int __init bcm_register_device(struct pl
|
|
return ret;
|
|
}
|
|
|
|
+/*
|
|
+ * Use this macro for platform devices that are present in the Device Tree.
|
|
+ * This way the device is only added on non-DT builds.
|
|
+ */
|
|
+#ifdef CONFIG_OF
|
|
+#define bcm_register_device_dt(pdev)
|
|
+#else
|
|
+#define bcm_register_device_dt(pdev) bcm_register_device(pdev)
|
|
+#endif
|
|
+
|
|
int calc_rsts(int partition)
|
|
{
|
|
return PM_PASSWORD |
|
|
@@ -784,7 +796,7 @@ void __init bcm2708_init(void)
|
|
for (i = 0; i < ARRAY_SIZE(bcm2708_alsa_devices); i++)
|
|
bcm_register_device(&bcm2708_alsa_devices[i]);
|
|
|
|
- bcm_register_device(&bcm2708_spi_device);
|
|
+ bcm_register_device_dt(&bcm2708_spi_device);
|
|
bcm_register_device(&bcm2708_bsc0_device);
|
|
bcm_register_device(&bcm2708_bsc1_device);
|
|
|
|
@@ -824,8 +836,9 @@ void __init bcm2708_init(void)
|
|
system_serial_low = serial;
|
|
|
|
#ifdef CONFIG_BCM2708_SPIDEV
|
|
- spi_register_board_info(bcm2708_spi_devices,
|
|
- ARRAY_SIZE(bcm2708_spi_devices));
|
|
+ if (!use_dt)
|
|
+ spi_register_board_info(bcm2708_spi_devices,
|
|
+ ARRAY_SIZE(bcm2708_spi_devices));
|
|
#endif
|
|
}
|
|
|
|
--- a/drivers/spi/Kconfig
|
|
+++ b/drivers/spi/Kconfig
|
|
@@ -77,7 +77,7 @@ config SPI_ATMEL
|
|
|
|
config SPI_BCM2835
|
|
tristate "BCM2835 SPI controller"
|
|
- depends on ARCH_BCM2835 || COMPILE_TEST
|
|
+ depends on ARCH_BCM2835 || ARCH_BCM2708 || COMPILE_TEST
|
|
help
|
|
This selects a driver for the Broadcom BCM2835 SPI master.
|
|
|
|
--- a/drivers/spi/spi-bcm2708.c
|
|
+++ b/drivers/spi/spi-bcm2708.c
|
|
@@ -512,6 +512,7 @@ static int bcm2708_spi_probe(struct plat
|
|
master->setup = bcm2708_spi_setup;
|
|
master->transfer = bcm2708_spi_transfer;
|
|
master->cleanup = bcm2708_spi_cleanup;
|
|
+ master->dev.of_node = pdev->dev.of_node;
|
|
platform_set_drvdata(pdev, master);
|
|
|
|
bs = spi_master_get_devdata(master);
|
|
@@ -596,10 +597,17 @@ static int bcm2708_spi_remove(struct pla
|
|
return 0;
|
|
}
|
|
|
|
+static const struct of_device_id bcm2708_spi_match[] = {
|
|
+ { .compatible = "brcm,bcm2708-spi", },
|
|
+ {}
|
|
+};
|
|
+MODULE_DEVICE_TABLE(of, bcm2708_spi_match);
|
|
+
|
|
static struct platform_driver bcm2708_spi_driver = {
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
.owner = THIS_MODULE,
|
|
+ .of_match_table = bcm2708_spi_match,
|
|
},
|
|
.probe = bcm2708_spi_probe,
|
|
.remove = bcm2708_spi_remove,
|