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pxa2xx: replace spi_master with spi_controller

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It's also a slave controller driver now, calling it "master" is slightly
misleading.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Lubomir Rintel
2019-01-16 16:13:31 +01:00
committed by Mark Brown
parent bfc7af6d6d
commit 51eea52d26
23 changed files with 139 additions and 139 deletions
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10
Documentation/spi/pxa2xx
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@@ -21,15 +21,15 @@ Typically a SPI master is defined in the arch/.../mach-*/board-*.c as a
"platform device". The master configuration is passed to the driver via a table
found in include/linux/spi/pxa2xx_spi.h:
struct pxa2xx_spi_master {
struct pxa2xx_spi_controller {
u16 num_chipselect;
u8 enable_dma;
};
The "pxa2xx_spi_master.num_chipselect" field is used to determine the number of
The "pxa2xx_spi_controller.num_chipselect" field is used to determine the number of
slave device (chips) attached to this SPI master.
The "pxa2xx_spi_master.enable_dma" field informs the driver that SSP DMA should
The "pxa2xx_spi_controller.enable_dma" field informs the driver that SSP DMA should
be used. This caused the driver to acquire two DMA channels: rx_channel and
tx_channel. The rx_channel has a higher DMA service priority the tx_channel.
See the "PXA2xx Developer Manual" section "DMA Controller".
@@ -51,7 +51,7 @@ static struct resource pxa_spi_nssp_resources[] = {
},
};
static struct pxa2xx_spi_master pxa_nssp_master_info = {
static struct pxa2xx_spi_controller pxa_nssp_master_info = {
.num_chipselect = 1, /* Matches the number of chips attached to NSSP */
.enable_dma = 1, /* Enables NSSP DMA */
};
@@ -206,7 +206,7 @@ DMA and PIO I/O Support
-----------------------
The pxa2xx_spi driver supports both DMA and interrupt driven PIO message
transfers. The driver defaults to PIO mode and DMA transfers must be enabled
by setting the "enable_dma" flag in the "pxa2xx_spi_master" structure. The DMA
by setting the "enable_dma" flag in the "pxa2xx_spi_controller" structure. The DMA
mode supports both coherent and stream based DMA mappings.
The following logic is used to determine the type of I/O to be used on