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authorLinus Torvalds <torvalds@linux-foundation.org>2023-02-21 02:28:57 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2023-02-21 02:28:57 +0300
commitff0c7e18629b8bd64681313a88ce55e182c9fee6 (patch)
tree70efa650f6458514e1d7e5e3f72cc8f87fc5cf2c /arch/arm/mach-omap1/fpga.c
parent5b0ed5964928b0aaf0d644c17c886c7f5ea4bb3f (diff)
parenta1f925bc4fa899b3c0f2dcbc432d572c36e74e71 (diff)
downloadlinux-ff0c7e18629b8bd64681313a88ce55e182c9fee6.tar.xz
Merge tag 'arm-boardfile-remove-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC boardfile updates from Arnd Bergmann "Unused boardfile removal for 6.3 This is a follow-up to the deprecation of most of the old-style board files that was merged in linux-6.0, removing them for good. This branch is almost exclusively dead code removal based on those annotations. Some device driver removals went through separate subsystem trees, but the majority is in the same branch, in order to better handle dependencies between the patches and avoid breaking bisection. Unfortunately that leads to merge conflicts against other changes in the subsystem trees, but they should all be trivial to resolve by removing the files. See commit 7d0d3fa7339e ("Merge tag 'arm-boardfiles-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc") for the description of which machines were marked unused and are now removed. The only removals that got postponed are Terastation WXL (mv78xx0) and Jornada720 (StrongARM1100), which turned out to still have potential users" * tag 'arm-boardfile-remove-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (91 commits) mmc: omap: drop TPS65010 dependency ARM: pxa: restore mfp-pxa320.h usb: ohci-omap: avoid unused-variable warning ARM: debug: remove references in DEBUG_UART_8250_SHIFT to removed configs ARM: s3c: remove obsolete s3c-cpu-freq header MAINTAINERS: adjust SAMSUNG SOC CLOCK DRIVERS after s3c24xx support removal MAINTAINERS: update file entries after arm multi-platform rework and mach-pxa removal ARM: remove CONFIG_UNUSED_BOARD_FILES mfd: remove htc-pasic3 driver w1: remove ds1wm driver usb: remove ohci-tmio driver fbdev: remove w100fb driver fbdev: remove tmiofb driver mmc: remove tmio_mmc driver mfd: remove ucb1400 support mfd: remove toshiba tmio drivers rtc: remove v3020 driver power: remove pda_power supply driver ASoC: pxa: remove unused board support pcmcia: remove unused pxa/sa1100 drivers ...
Diffstat (limited to 'arch/arm/mach-omap1/fpga.c')
-rw-r--r--arch/arm/mach-omap1/fpga.c186
1 files changed, 0 insertions, 186 deletions
diff --git a/arch/arm/mach-omap1/fpga.c b/arch/arm/mach-omap1/fpga.c
deleted file mode 100644
index 4c71a195969f..000000000000
--- a/arch/arm/mach-omap1/fpga.c
+++ /dev/null
@@ -1,186 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * linux/arch/arm/mach-omap1/fpga.c
- *
- * Interrupt handler for OMAP-1510 Innovator FPGA
- *
- * Copyright (C) 2001 RidgeRun, Inc.
- * Author: Greg Lonnon <glonnon@ridgerun.com>
- *
- * Copyright (C) 2002 MontaVista Software, Inc.
- *
- * Separated FPGA interrupts from innovator1510.c and cleaned up for 2.6
- * Copyright (C) 2004 Nokia Corporation by Tony Lindrgen <tony@atomide.com>
- */
-
-#include <linux/types.h>
-#include <linux/gpio.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/errno.h>
-#include <linux/io.h>
-
-#include <asm/irq.h>
-#include <asm/mach/irq.h>
-
-#include "hardware.h"
-#include "iomap.h"
-#include "common.h"
-#include "fpga.h"
-
-static void fpga_mask_irq(struct irq_data *d)
-{
- unsigned int irq = d->irq - OMAP_FPGA_IRQ_BASE;
-
- if (irq < 8)
- __raw_writeb((__raw_readb(OMAP1510_FPGA_IMR_LO)
- & ~(1 << irq)), OMAP1510_FPGA_IMR_LO);
- else if (irq < 16)
- __raw_writeb((__raw_readb(OMAP1510_FPGA_IMR_HI)
- & ~(1 << (irq - 8))), OMAP1510_FPGA_IMR_HI);
- else
- __raw_writeb((__raw_readb(INNOVATOR_FPGA_IMR2)
- & ~(1 << (irq - 16))), INNOVATOR_FPGA_IMR2);
-}
-
-
-static inline u32 get_fpga_unmasked_irqs(void)
-{
- return
- ((__raw_readb(OMAP1510_FPGA_ISR_LO) &
- __raw_readb(OMAP1510_FPGA_IMR_LO))) |
- ((__raw_readb(OMAP1510_FPGA_ISR_HI) &
- __raw_readb(OMAP1510_FPGA_IMR_HI)) << 8) |
- ((__raw_readb(INNOVATOR_FPGA_ISR2) &
- __raw_readb(INNOVATOR_FPGA_IMR2)) << 16);
-}
-
-
-static void fpga_ack_irq(struct irq_data *d)
-{
- /* Don't need to explicitly ACK FPGA interrupts */
-}
-
-static void fpga_unmask_irq(struct irq_data *d)
-{
- unsigned int irq = d->irq - OMAP_FPGA_IRQ_BASE;
-
- if (irq < 8)
- __raw_writeb((__raw_readb(OMAP1510_FPGA_IMR_LO) | (1 << irq)),
- OMAP1510_FPGA_IMR_LO);
- else if (irq < 16)
- __raw_writeb((__raw_readb(OMAP1510_FPGA_IMR_HI)
- | (1 << (irq - 8))), OMAP1510_FPGA_IMR_HI);
- else
- __raw_writeb((__raw_readb(INNOVATOR_FPGA_IMR2)
- | (1 << (irq - 16))), INNOVATOR_FPGA_IMR2);
-}
-
-static void fpga_mask_ack_irq(struct irq_data *d)
-{
- fpga_mask_irq(d);
- fpga_ack_irq(d);
-}
-
-static void innovator_fpga_IRQ_demux(struct irq_desc *desc)
-{
- u32 stat;
- int fpga_irq;
-
- stat = get_fpga_unmasked_irqs();
-
- if (!stat)
- return;
-
- for (fpga_irq = OMAP_FPGA_IRQ_BASE;
- (fpga_irq < OMAP_FPGA_IRQ_END) && stat;
- fpga_irq++, stat >>= 1) {
- if (stat & 1) {
- generic_handle_irq(fpga_irq);
- }
- }
-}
-
-static struct irq_chip omap_fpga_irq_ack = {
- .name = "FPGA-ack",
- .irq_ack = fpga_mask_ack_irq,
- .irq_mask = fpga_mask_irq,
- .irq_unmask = fpga_unmask_irq,
-};
-
-
-static struct irq_chip omap_fpga_irq = {
- .name = "FPGA",
- .irq_ack = fpga_ack_irq,
- .irq_mask = fpga_mask_irq,
- .irq_unmask = fpga_unmask_irq,
-};
-
-/*
- * All of the FPGA interrupt request inputs except for the touchscreen are
- * edge-sensitive; the touchscreen is level-sensitive. The edge-sensitive
- * interrupts are acknowledged as a side-effect of reading the interrupt
- * status register from the FPGA. The edge-sensitive interrupt inputs
- * cause a problem with level interrupt requests, such as Ethernet. The
- * problem occurs when a level interrupt request is asserted while its
- * interrupt input is masked in the FPGA, which results in a missed
- * interrupt.
- *
- * In an attempt to workaround the problem with missed interrupts, the
- * mask_ack routine for all of the FPGA interrupts has been changed from
- * fpga_mask_ack_irq() to fpga_ack_irq() so that the specific FPGA interrupt
- * being serviced is left unmasked. We can do this because the FPGA cascade
- * interrupt is run with all interrupts masked.
- *
- * Limited testing indicates that this workaround appears to be effective
- * for the smc9194 Ethernet driver used on the Innovator. It should work
- * on other FPGA interrupts as well, but any drivers that explicitly mask
- * interrupts at the interrupt controller via disable_irq/enable_irq
- * could pose a problem.
- */
-void omap1510_fpga_init_irq(void)
-{
- int i, res;
-
- __raw_writeb(0, OMAP1510_FPGA_IMR_LO);
- __raw_writeb(0, OMAP1510_FPGA_IMR_HI);
- __raw_writeb(0, INNOVATOR_FPGA_IMR2);
-
- for (i = OMAP_FPGA_IRQ_BASE; i < OMAP_FPGA_IRQ_END; i++) {
-
- if (i == OMAP1510_INT_FPGA_TS) {
- /*
- * The touchscreen interrupt is level-sensitive, so
- * we'll use the regular mask_ack routine for it.
- */
- irq_set_chip(i, &omap_fpga_irq_ack);
- }
- else {
- /*
- * All FPGA interrupts except the touchscreen are
- * edge-sensitive, so we won't mask them.
- */
- irq_set_chip(i, &omap_fpga_irq);
- }
-
- irq_set_handler(i, handle_edge_irq);
- irq_clear_status_flags(i, IRQ_NOREQUEST);
- }
-
- /*
- * The FPGA interrupt line is connected to GPIO13. Claim this pin for
- * the ARM.
- *
- * NOTE: For general GPIO/MPUIO access and interrupts, please see
- * gpio.[ch]
- */
- res = gpio_request(13, "FPGA irq");
- if (res) {
- pr_err("%s failed to get gpio\n", __func__);
- return;
- }
- gpio_direction_input(13);
- irq_set_irq_type(gpio_to_irq(13), IRQ_TYPE_EDGE_RISING);
- irq_set_chained_handler(OMAP1510_INT_FPGA, innovator_fpga_IRQ_demux);
-}