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spi: altera: add platform data for slave information.

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This patch introduces platform data for slave information, it allows
spi-altera to add new spi devices once master registration is done.

Signed-off-by: Wu Hao <hao.wu@intel.com>
Signed-off-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Matthew Gerlach <matthew.gerlach@linux.intel.com>
Signed-off-by: Russ Weight <russell.h.weight@intel.com>
Reviewed-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/1591845911-10197-4-git-send-email-yilun.xu@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Xu Yilun 2020-06-11 11:25:08 +08:00 committed by Mark Brown
parent 8e04187c1b
commit 1fccd182a4
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 16 additions and 0 deletions
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11
drivers/spi/spi-altera.c
View File

@ -189,6 +189,7 @@ static int altera_spi_probe(struct platform_device *pdev)
struct altera_spi *hw;
struct spi_master *master;
int err = -ENODEV;
u16 i;
master = spi_alloc_master(&pdev->dev, sizeof(struct altera_spi));
if (!master)
@ -244,6 +245,16 @@ static int altera_spi_probe(struct platform_device *pdev)
err = devm_spi_register_master(&pdev->dev, master);
if (err)
goto exit;
if (pdata) {
for (i = 0; i < pdata->num_devices; i++) {
if (!spi_new_device(master, pdata->devices + i))
dev_warn(&pdev->dev,
"unable to create SPI device: %s\n",
pdata->devices[i].modalias);
}
}
dev_info(&pdev->dev, "base %p, irq %d\n", hw->base, hw->irq);
return 0;

5
include/linux/spi/altera.h
View File

@ -14,11 +14,16 @@
* @mode_bits: Mode bits of SPI master.
* @num_chipselect: Number of chipselects.
* @bits_per_word_mask: bitmask of supported bits_per_word for transfers.
* @num_devices: Number of devices that shall be added when the driver
* is probed.
* @devices: The devices to add.
*/
struct altera_spi_platform_data {
u16 mode_bits;
u16 num_chipselect;
u32 bits_per_word_mask;
u16 num_devices;
struct spi_board_info *devices;
};
#endif /* __LINUX_SPI_ALTERA_H */