arch: remove blackfin port

The Analog Devices Blackfin port was added in 2007 and was rather
active for a while, but all work on it has come to a standstill
over time, as Analog have changed their product line-up.

Aaron Wu confirmed that the architecture port is no longer relevant,
and multiple people suggested removing blackfin independently because
of some of its oddities like a non-working SMP port, and the amount of
duplication between the chip variants, which cause extra work when
doing cross-architecture changes.

Link: https://docs.blackfin.uclinux.org/
Acked-by: Aaron Wu <Aaron.Wu@analog.com>
Acked-by: Bryan Wu <cooloney@gmail.com>
Cc: Steven Miao <realmz6@gmail.com>
Cc: Mike Frysinger <vapier@chromium.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 164 deletions

diff --git a/arch/blackfin/mach-common/dpmc.c b/arch/blackfin/mach-common/dpmc.c
deleted file mode 100644
index 724a8c5f5578..000000000000
--- a/arch/blackfin/mach-common/dpmc.c
+++ /dev/null
@@ -1,164 +0,0 @@
-/*
- * Copyright 2008 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/cdev.h>
-#include <linux/device.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/types.h>
-#include <linux/cpufreq.h>
-
-#include <asm/delay.h>
-#include <asm/dpmc.h>
-
-#define DRIVER_NAME "bfin dpmc"
-
-struct bfin_dpmc_platform_data *pdata;
-
-/**
- *	bfin_set_vlev - Update VLEV field in VR_CTL Reg.
- *			Avoid BYPASS sequence
- */
-static void bfin_set_vlev(unsigned int vlev)
-{
-	unsigned pll_lcnt;
-
-	pll_lcnt = bfin_read_PLL_LOCKCNT();
-
-	bfin_write_PLL_LOCKCNT(1);
-	bfin_write_VR_CTL((bfin_read_VR_CTL() & ~VLEV) | vlev);
-	bfin_write_PLL_LOCKCNT(pll_lcnt);
-}
-
-/**
- *	bfin_get_vlev - Get CPU specific VLEV from platform device data
- */
-static unsigned int bfin_get_vlev(unsigned int freq)
-{
-	int i;
-
-	if (!pdata)
-		goto err_out;
-
-	freq >>= 16;
-
-	for (i = 0; i < pdata->tabsize; i++)
-		if (freq <= (pdata->tuple_tab[i] & 0xFFFF))
-			return pdata->tuple_tab[i] >> 16;
-
-err_out:
-	printk(KERN_WARNING "DPMC: No suitable CCLK VDDINT voltage pair found\n");
-	return VLEV_120;
-}
-
-#ifdef CONFIG_CPU_FREQ
-# ifdef CONFIG_SMP
-static void bfin_idle_this_cpu(void *info)
-{
-	unsigned long flags = 0;
-	unsigned long iwr0, iwr1, iwr2;
-	unsigned int cpu = smp_processor_id();
-
-	local_irq_save_hw(flags);
-	bfin_iwr_set_sup0(&iwr0, &iwr1, &iwr2);
-
-	platform_clear_ipi(cpu, IRQ_SUPPLE_0);
-	SSYNC();
-	asm("IDLE;");
-	bfin_iwr_restore(iwr0, iwr1, iwr2);
-
-	local_irq_restore_hw(flags);
-}
-
-static void bfin_idle_cpu(void)
-{
-	smp_call_function(bfin_idle_this_cpu, NULL, 0);
-}
-
-static void bfin_wakeup_cpu(void)
-{
-	unsigned int cpu;
-	unsigned int this_cpu = smp_processor_id();
-	cpumask_t mask;
-
-	cpumask_copy(&mask, cpu_online_mask);
-	cpumask_clear_cpu(this_cpu, &mask);
-	for_each_cpu(cpu, &mask)
-		platform_send_ipi_cpu(cpu, IRQ_SUPPLE_0);
-}
-
-# else
-static void bfin_idle_cpu(void) {}
-static void bfin_wakeup_cpu(void) {}
-# endif
-
-static int
-vreg_cpufreq_notifier(struct notifier_block *nb, unsigned long val, void *data)
-{
-	struct cpufreq_freqs *freq = data;
-
-	if (freq->cpu != CPUFREQ_CPU)
-		return 0;
-
-	if (val == CPUFREQ_PRECHANGE && freq->old < freq->new) {
-		bfin_idle_cpu();
-		bfin_set_vlev(bfin_get_vlev(freq->new));
-		udelay(pdata->vr_settling_time); /* Wait until Volatge settled */
-		bfin_wakeup_cpu();
-	} else if (val == CPUFREQ_POSTCHANGE && freq->old > freq->new) {
-		bfin_idle_cpu();
-		bfin_set_vlev(bfin_get_vlev(freq->new));
-		bfin_wakeup_cpu();
-	}
-
-	return 0;
-}
-
-static struct notifier_block vreg_cpufreq_notifier_block = {
-	.notifier_call	= vreg_cpufreq_notifier
-};
-#endif /* CONFIG_CPU_FREQ */
-
-/**
- *	bfin_dpmc_probe -
- *
- */
-static int bfin_dpmc_probe(struct platform_device *pdev)
-{
-	if (pdev->dev.platform_data)
-		pdata = pdev->dev.platform_data;
-	else
-		return -EINVAL;
-
-	return cpufreq_register_notifier(&vreg_cpufreq_notifier_block,
-					 CPUFREQ_TRANSITION_NOTIFIER);
-}
-
-/**
- *	bfin_dpmc_remove -
- */
-static int bfin_dpmc_remove(struct platform_device *pdev)
-{
-	pdata = NULL;
-	return cpufreq_unregister_notifier(&vreg_cpufreq_notifier_block,
-					 CPUFREQ_TRANSITION_NOTIFIER);
-}
-
-struct platform_driver bfin_dpmc_device_driver = {
-	.probe   = bfin_dpmc_probe,
-	.remove  = bfin_dpmc_remove,
-	.driver  = {
-		.name = DRIVER_NAME,
-	}
-};
-module_platform_driver(bfin_dpmc_device_driver);
-
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
-MODULE_DESCRIPTION("cpu power management driver for Blackfin");
-MODULE_LICENSE("GPL");