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author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-22 17:52:44 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-22 17:52:44 -0400 |
commit | 7235dd74a4733d4b3651349b5261d2e06996427d (patch) | |
tree | 737d4141e77fdd6bfd8c9878ed4f7fe293e7b629 /Documentation | |
parent | c7c8518498e82591d7784452f5674c3aeb4d079c (diff) | |
parent | 22a85e4cd51b49ec99703ddfdff8686d5442a093 (diff) |
Merge branch 'spi/next' of git://git.secretlab.ca/git/linux-2.6
* 'spi/next' of git://git.secretlab.ca/git/linux-2.6: (34 commits)
spi/imx: add device tree probe support
spi/imx: copy gpio number passed by platform data into driver private data
spi/imx: use soc name in spi device type naming scheme
spi/imx: merge type SPI_IMX_VER_0_7 into SPI_IMX_VER_0_4
spi/imx: do not use spi_imx2_3 to name SPI_IMX_VER_2_3 function and macro
spi/imx: use mx21 to name SPI_IMX_VER_0_0 function and macro
spi/imx: do not make copy of spi_imx_devtype_data
spi/dw: Add spi number into spi irq desc
spi/tegra: Use engineering names in DT compatible property
spi/fsl_spi: fix CPM spi driver
mach-s3c2410: remove unused spi-gpio.h file
spi: remove obsolete spi-s3c24xx-gpio driver
mach-gta2: remove unused spi-gpio.h include
mach-qt2410: convert to spi_gpio
mach-jive: convert to spi_gpio
spi/pxa2xx: Remove unavailable ssp_type from documentation
spi/bfin_spi: uninline fat queue funcs
spi/bfin_spi: constify pin array
spi/bfin_spi: use structs for accessing hardware regs
spi/topcliff-pch: Support new device ML7223 IOH
...
Fix up trivial conflict in arch/arm/mach-ep93xx/Makefile
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt | 22 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/spi/spi_nvidia.txt | 5 | ||||
-rw-r--r-- | Documentation/spi/ep93xx_spi | 10 | ||||
-rw-r--r-- | Documentation/spi/pxa2xx | 5 |
4 files changed, 37 insertions, 5 deletions
diff --git a/Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt b/Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt new file mode 100644 index 00000000000..9841057d112 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt | |||
@@ -0,0 +1,22 @@ | |||
1 | * Freescale (Enhanced) Configurable Serial Peripheral Interface | ||
2 | (CSPI/eCSPI) for i.MX | ||
3 | |||
4 | Required properties: | ||
5 | - compatible : Should be "fsl,<soc>-cspi" or "fsl,<soc>-ecspi" | ||
6 | - reg : Offset and length of the register set for the device | ||
7 | - interrupts : Should contain CSPI/eCSPI interrupt | ||
8 | - fsl,spi-num-chipselects : Contains the number of the chipselect | ||
9 | - cs-gpios : Specifies the gpio pins to be used for chipselects. | ||
10 | |||
11 | Example: | ||
12 | |||
13 | ecspi@70010000 { | ||
14 | #address-cells = <1>; | ||
15 | #size-cells = <0>; | ||
16 | compatible = "fsl,imx51-ecspi"; | ||
17 | reg = <0x70010000 0x4000>; | ||
18 | interrupts = <36>; | ||
19 | fsl,spi-num-chipselects = <2>; | ||
20 | cs-gpios = <&gpio3 24 0>, /* GPIO4_24 */ | ||
21 | <&gpio3 25 0>; /* GPIO4_25 */ | ||
22 | }; | ||
diff --git a/Documentation/devicetree/bindings/spi/spi_nvidia.txt b/Documentation/devicetree/bindings/spi/spi_nvidia.txt new file mode 100644 index 00000000000..6b9e5189669 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/spi_nvidia.txt | |||
@@ -0,0 +1,5 @@ | |||
1 | NVIDIA Tegra 2 SPI device | ||
2 | |||
3 | Required properties: | ||
4 | - compatible : should be "nvidia,tegra20-spi". | ||
5 | - gpios : should specify GPIOs used for chipselect. | ||
diff --git a/Documentation/spi/ep93xx_spi b/Documentation/spi/ep93xx_spi index 6325f5b4863..d8eb01c15db 100644 --- a/Documentation/spi/ep93xx_spi +++ b/Documentation/spi/ep93xx_spi | |||
@@ -88,6 +88,16 @@ static void __init ts72xx_init_machine(void) | |||
88 | ARRAY_SIZE(ts72xx_spi_devices)); | 88 | ARRAY_SIZE(ts72xx_spi_devices)); |
89 | } | 89 | } |
90 | 90 | ||
91 | The driver can use DMA for the transfers also. In this case ts72xx_spi_info | ||
92 | becomes: | ||
93 | |||
94 | static struct ep93xx_spi_info ts72xx_spi_info = { | ||
95 | .num_chipselect = ARRAY_SIZE(ts72xx_spi_devices), | ||
96 | .use_dma = true; | ||
97 | }; | ||
98 | |||
99 | Note that CONFIG_EP93XX_DMA should be enabled as well. | ||
100 | |||
91 | Thanks to | 101 | Thanks to |
92 | ========= | 102 | ========= |
93 | Martin Guy, H. Hartley Sweeten and others who helped me during development of | 103 | Martin Guy, H. Hartley Sweeten and others who helped me during development of |
diff --git a/Documentation/spi/pxa2xx b/Documentation/spi/pxa2xx index 493dada5737..00511e08db7 100644 --- a/Documentation/spi/pxa2xx +++ b/Documentation/spi/pxa2xx | |||
@@ -22,15 +22,11 @@ Typically a SPI master is defined in the arch/.../mach-*/board-*.c as a | |||
22 | found in include/linux/spi/pxa2xx_spi.h: | 22 | found in include/linux/spi/pxa2xx_spi.h: |
23 | 23 | ||
24 | struct pxa2xx_spi_master { | 24 | struct pxa2xx_spi_master { |
25 | enum pxa_ssp_type ssp_type; | ||
26 | u32 clock_enable; | 25 | u32 clock_enable; |
27 | u16 num_chipselect; | 26 | u16 num_chipselect; |
28 | u8 enable_dma; | 27 | u8 enable_dma; |
29 | }; | 28 | }; |
30 | 29 | ||
31 | The "pxa2xx_spi_master.ssp_type" field must have a value between 1 and 3 and | ||
32 | informs the driver which features a particular SSP supports. | ||
33 | |||
34 | The "pxa2xx_spi_master.clock_enable" field is used to enable/disable the | 30 | The "pxa2xx_spi_master.clock_enable" field is used to enable/disable the |
35 | corresponding SSP peripheral block in the "Clock Enable Register (CKEN"). See | 31 | corresponding SSP peripheral block in the "Clock Enable Register (CKEN"). See |
36 | the "PXA2xx Developer Manual" section "Clocks and Power Management". | 32 | the "PXA2xx Developer Manual" section "Clocks and Power Management". |
@@ -61,7 +57,6 @@ static struct resource pxa_spi_nssp_resources[] = { | |||
61 | }; | 57 | }; |
62 | 58 | ||
63 | static struct pxa2xx_spi_master pxa_nssp_master_info = { | 59 | static struct pxa2xx_spi_master pxa_nssp_master_info = { |
64 | .ssp_type = PXA25x_NSSP, /* Type of SSP */ | ||
65 | .clock_enable = CKEN_NSSP, /* NSSP Peripheral clock */ | 60 | .clock_enable = CKEN_NSSP, /* NSSP Peripheral clock */ |
66 | .num_chipselect = 1, /* Matches the number of chips attached to NSSP */ | 61 | .num_chipselect = 1, /* Matches the number of chips attached to NSSP */ |
67 | .enable_dma = 1, /* Enables NSSP DMA */ | 62 | .enable_dma = 1, /* Enables NSSP DMA */ |