oxnas: reboot target

Reboot the oxnas target based on Linux 4.14 by rebasing our support on
top of the now-existing upstream kernel support.
This commit brings oxnas support to the level of v4.17 having upstream
drivers for Ethernet, Serial and NAND flash.
Botch up OpenWrt's local drivers for EHCI, SATA and PCIe based on the
new platform code and device-tree.
Re-introduce base-files from old oxnas target which works for now but
needs further clean-up towards generic board support.

Functional issues:
 * PCIe won't come up (hence no USB3 on Shuttle KD20)
 * I2C bus of Akitio myCloud device is likely not to work (missing
   debounce support in new pinctrl driver)

Code-style issues:
 * plla/pllb needs further cleanup -- currently their users are writing
   into the syscon regmap after acquireling the clk instead of using
   defined clk_*_*() functions to setup multipliers and dividors.
 * PCIe phy needs its own little driver.
 * SATA driver is a monster and should be split into an mfd having
   a raidctrl regmap, sata controller, sata ports and sata phy.

Tested on MitraStar STG-212 aka. Medion Akoya MD86xxx and Shuttle KD20.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(squash-picked commit 17511a7ea8 and commit dcc34574ef from master)

1 files changed, 0 insertions, 96 deletions

diff --git a/target/linux/oxnas/files/drivers/clocksource/oxnas_rps_timer.c b/target/linux/oxnas/files/drivers/clocksource/oxnas_rps_timer.c
deleted file mode 100644
index 7c8c4cf435..0000000000
--- a/target/linux/oxnas/files/drivers/clocksource/oxnas_rps_timer.c
+++ /dev/null
@@ -1,96 +0,0 @@
-/*
- * arch/arm/mach-ox820/rps-time.c
- *
- * Copyright (C) 2009 Oxford Semiconductor Ltd
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-#include <linux/clockchips.h>
-#include <linux/clk.h>
-#include <linux/of_irq.h>
-#include <linux/of_address.h>
-#include <linux/sched_clock.h>
-#include <mach/hardware.h>
-
-enum {
-	TIMER_LOAD = 0,
-	TIMER_CURR = 4,
-	TIMER_CTRL = 8,
-	TIMER_CLRINT = 0xC,
-
-	TIMER_BITS = 24,
-
-	TIMER_MAX_VAL = (1 << TIMER_BITS) - 1,
-
-	TIMER_PERIODIC = (1 << 6),
-	TIMER_ENABLE = (1 << 7),
-
-	TIMER_DIV1  = (0 << 2),
-	TIMER_DIV16  = (1 << 2),
-	TIMER_DIV256  = (2 << 2),
-
-	TIMER1_OFFSET = 0,
-	TIMER2_OFFSET = 0x20,
-
-};
-
-static u64 notrace rps_read_sched_clock(void)
-{
-	return ~readl_relaxed(RPSA_TIMER2_VAL);
-}
-
-static void __init rps_clocksource_init(void __iomem *base, ulong ref_rate)
-{
-	int ret;
-	ulong clock_rate;
-	/* use prescale 16 */
-	clock_rate = ref_rate / 16;
-
-	iowrite32(TIMER_MAX_VAL, base + TIMER_LOAD);
-	iowrite32(TIMER_PERIODIC | TIMER_ENABLE | TIMER_DIV16,
-			base + TIMER_CTRL);
-
-	ret = clocksource_mmio_init(base + TIMER_CURR, "rps_clocksource_timer",
-					clock_rate, 250, TIMER_BITS,
-					clocksource_mmio_readl_down);
-	if (ret)
-		panic("can't register clocksource\n");
-
-	sched_clock_register(rps_read_sched_clock, TIMER_BITS, clock_rate);
-}
-
-static void __init rps_timer_init(struct device_node *np)
-{
-	struct clk *refclk;
-	unsigned long ref_rate;
-	void __iomem *base;
-
-	refclk = of_clk_get(np, 0);
-
-	if (IS_ERR(refclk) || clk_prepare_enable(refclk))
-		panic("rps_timer_init: failed to get refclk\n");
-	ref_rate = clk_get_rate(refclk);
-
-	base = of_iomap(np, 0);
-	if (!base)
-		panic("rps_timer_init: failed to map io\n");
-
-	rps_clocksource_init(base + TIMER2_OFFSET, ref_rate);
-}
-
-CLOCKSOURCE_OF_DECLARE(nas782x, "plxtech,nas782x-rps-timer", rps_timer_init);