arm/mach-omap1/fpga.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * linux/arch/arm/mach-omap1/fpga.c
5  * Interrupt handler for OMAP-1510 Innovator FPGA
35 	unsigned int irq = d->irq - OMAP_FPGA_IRQ_BASE;  in fpga_mask_irq()
42 			      & ~(1 << (irq - 8))), OMAP1510_FPGA_IMR_HI);  in fpga_mask_irq()
45 			      & ~(1 << (irq - 16))), INNOVATOR_FPGA_IMR2);  in fpga_mask_irq()
68 	unsigned int irq = d->irq - OMAP_FPGA_IRQ_BASE;  in fpga_unmask_irq()
75 			      | (1 << (irq - 8))), OMAP1510_FPGA_IMR_HI);  in fpga_unmask_irq()
78 			      | (1 << (irq - 16))), INNOVATOR_FPGA_IMR2);  in fpga_unmask_irq()
107 	.name		= "FPGA-ack",
123  * edge-sensitive; the touchscreen is level-sensitive.  The edge-sensitive
124  * interrupts are acknowledged as a side-effect of reading the interrupt
125  * status register from the FPGA.  The edge-sensitive interrupt inputs
126  * cause a problem with level interrupt requests, such as Ethernet.  The
127  * problem occurs when a level interrupt request is asserted while its
155 			 * The touchscreen interrupt is level-sensitive, so  in omap1510_fpga_init_irq()
163 			 * edge-sensitive, so we won't mask them.  in omap1510_fpga_init_irq()