forked from mirrors/linux
f3d5e4f18d
In some cases, the system bus can be configured for 16-bit mode, in this case using read/write functions for 32-bit values results in two cycles of 16 bits each, which is wrong. This patch adds the devicetree flag to switch the driver to use 16-bit mode for I/O transfers. Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Jens Axboe <axboe@kernel.dk>
32 lines
749 B
C
32 lines
749 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LINUX_ATA_PLATFORM_H
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#define __LINUX_ATA_PLATFORM_H
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struct pata_platform_info {
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/*
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* I/O port shift, for platforms with ports that are
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* constantly spaced and need larger than the 1-byte
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* spacing used by ata_std_ports().
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*/
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unsigned int ioport_shift;
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};
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struct scsi_host_template;
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extern int __pata_platform_probe(struct device *dev,
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struct resource *io_res,
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struct resource *ctl_res,
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struct resource *irq_res,
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unsigned int ioport_shift,
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int __pio_mask,
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struct scsi_host_template *sht,
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bool use16bit);
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/*
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* Marvell SATA private data
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*/
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struct mv_sata_platform_data {
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int n_ports; /* number of sata ports */
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};
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#endif /* __LINUX_ATA_PLATFORM_H */
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