spi: Add Flag to Enable Slave Select with GPIO Chip Select.

Some SPI masters require slave selection before the transfer
can begin [1]. The SPI framework currently selects the chip using
either 1) the internal CS mechanism or 2) the GPIO CS, but not both.

This patch adds a new master->flags define to indicate both the GPIO
CS and the internal chip select mechanism should be used.

Tested On:
    Altera CycloneV development kit
    Compile tested for build errors on x86_64 (allyesconfigs)

[1] DesignWare dw_apb_ssi Databook, Version 3.20a (page 39)

Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

path: root/irq.h

#ifndef IRQ_H
#define IRQ_H

extern int device_irq_number(const char *ifname);
extern void device_restore_irq_affinity_list(void);
extern int device_set_irq_affinity_list(int irq, unsigned long from,
					unsigned long to);
extern int device_set_irq_affinity(int irq, unsigned long cpu);

#endif /* IRQ_H */