* [PATCH 1/4] timer: remove u300 driver
2021-01-20 13:15 [PATCH 0/4] clocksource: remove obsolete drivers Arnd Bergmann
@ 2021-01-20 13:15 ` Arnd Bergmann
2021-01-21 8:37 ` Linus Walleij
2021-01-20 13:15 ` [PATCH 2/4] timer: remove tango driver Arnd Bergmann
` (3 subsequent siblings)
4 siblings, 1 reply; 12+ messages in thread
From: Arnd Bergmann @ 2021-01-20 13:15 UTC (permalink / raw)
To: linux-arm-kernel, linux-kernel, Daniel Lezcano, Thomas Gleixner
Cc: Linus Walleij, Arnd Bergmann
From: Arnd Bergmann <arnd@arndb.de>
The ST-Ericsson U300 platform is getting removed, so this driver is no
longer needed.
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
.../timer/stericsson-u300-apptimer.txt | 18 -
drivers/clocksource/Kconfig | 7 -
drivers/clocksource/Makefile | 1 -
drivers/clocksource/timer-u300.c | 457 ------------------
4 files changed, 483 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/timer/stericsson-u300-apptimer.txt
delete mode 100644 drivers/clocksource/timer-u300.c
diff --git a/Documentation/devicetree/bindings/timer/stericsson-u300-apptimer.txt b/Documentation/devicetree/bindings/timer/stericsson-u300-apptimer.txt
deleted file mode 100644
index 9499bc8ee9e3..000000000000
--- a/Documentation/devicetree/bindings/timer/stericsson-u300-apptimer.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-ST-Ericsson U300 apptimer
-
-Required properties:
-
-- compatible : should be "stericsson,u300-apptimer"
-- reg : Specifies base physical address and size of the registers.
-- interrupts : A list of 4 interrupts; one for each subtimer. These
- are, in order: OS (operating system), DD (device driver) both
- adopted for EPOC/Symbian with two specific IRQs for these tasks,
- then GP1 and GP2, which are general-purpose timers.
-
-Example:
-
-timer {
- compatible = "stericsson,u300-apptimer";
- reg = <0xc0014000 0x1000>;
- interrupts = <24 25 26 27>;
-};
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 14c7c4712478..824a0f6b77d4 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -216,13 +216,6 @@ config PRIMA2_TIMER
help
Enables support for the Prima2 timer.
-config U300_TIMER
- bool "U300 timer driver" if COMPILE_TEST
- depends on ARM
- select CLKSRC_MMIO
- help
- Enables support for the U300 timer.
-
config NSPIRE_TIMER
bool "NSpire timer driver" if COMPILE_TEST
select CLKSRC_MMIO
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 3c75cbbf8533..41c154478a1a 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -34,7 +34,6 @@ obj-$(CONFIG_ATLAS7_TIMER) += timer-atlas7.o
obj-$(CONFIG_MXS_TIMER) += mxs_timer.o
obj-$(CONFIG_CLKSRC_PXA) += timer-pxa.o
obj-$(CONFIG_PRIMA2_TIMER) += timer-prima2.o
-obj-$(CONFIG_U300_TIMER) += timer-u300.o
obj-$(CONFIG_SUN4I_TIMER) += timer-sun4i.o
obj-$(CONFIG_SUN5I_HSTIMER) += timer-sun5i.o
obj-$(CONFIG_MESON6_TIMER) += timer-meson6.o
diff --git a/drivers/clocksource/timer-u300.c b/drivers/clocksource/timer-u300.c
deleted file mode 100644
index 37cba8dfd45f..000000000000
--- a/drivers/clocksource/timer-u300.c
+++ /dev/null
@@ -1,457 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (C) 2007-2009 ST-Ericsson AB
- * Timer COH 901 328, runs the OS timer interrupt.
- * Author: Linus Walleij <linus.walleij@stericsson.com>
- */
-#include <linux/interrupt.h>
-#include <linux/time.h>
-#include <linux/timex.h>
-#include <linux/clockchips.h>
-#include <linux/clocksource.h>
-#include <linux/types.h>
-#include <linux/io.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/irq.h>
-#include <linux/delay.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/sched_clock.h>
-
-/* Generic stuff */
-#include <asm/mach/map.h>
-#include <asm/mach/time.h>
-
-/*
- * APP side special timer registers
- * This timer contains four timers which can fire an interrupt each.
- * OS (operating system) timer @ 32768 Hz
- * DD (device driver) timer @ 1 kHz
- * GP1 (general purpose 1) timer @ 1MHz
- * GP2 (general purpose 2) timer @ 1MHz
- */
-
-/* Reset OS Timer 32bit (-/W) */
-#define U300_TIMER_APP_ROST (0x0000)
-#define U300_TIMER_APP_ROST_TIMER_RESET (0x00000000)
-/* Enable OS Timer 32bit (-/W) */
-#define U300_TIMER_APP_EOST (0x0004)
-#define U300_TIMER_APP_EOST_TIMER_ENABLE (0x00000000)
-/* Disable OS Timer 32bit (-/W) */
-#define U300_TIMER_APP_DOST (0x0008)
-#define U300_TIMER_APP_DOST_TIMER_DISABLE (0x00000000)
-/* OS Timer Mode Register 32bit (-/W) */
-#define U300_TIMER_APP_SOSTM (0x000c)
-#define U300_TIMER_APP_SOSTM_MODE_CONTINUOUS (0x00000000)
-#define U300_TIMER_APP_SOSTM_MODE_ONE_SHOT (0x00000001)
-/* OS Timer Status Register 32bit (R/-) */
-#define U300_TIMER_APP_OSTS (0x0010)
-#define U300_TIMER_APP_OSTS_TIMER_STATE_MASK (0x0000000F)
-#define U300_TIMER_APP_OSTS_TIMER_STATE_IDLE (0x00000001)
-#define U300_TIMER_APP_OSTS_TIMER_STATE_ACTIVE (0x00000002)
-#define U300_TIMER_APP_OSTS_ENABLE_IND (0x00000010)
-#define U300_TIMER_APP_OSTS_MODE_MASK (0x00000020)
-#define U300_TIMER_APP_OSTS_MODE_CONTINUOUS (0x00000000)
-#define U300_TIMER_APP_OSTS_MODE_ONE_SHOT (0x00000020)
-#define U300_TIMER_APP_OSTS_IRQ_ENABLED_IND (0x00000040)
-#define U300_TIMER_APP_OSTS_IRQ_PENDING_IND (0x00000080)
-/* OS Timer Current Count Register 32bit (R/-) */
-#define U300_TIMER_APP_OSTCC (0x0014)
-/* OS Timer Terminal Count Register 32bit (R/W) */
-#define U300_TIMER_APP_OSTTC (0x0018)
-/* OS Timer Interrupt Enable Register 32bit (-/W) */
-#define U300_TIMER_APP_OSTIE (0x001c)
-#define U300_TIMER_APP_OSTIE_IRQ_DISABLE (0x00000000)
-#define U300_TIMER_APP_OSTIE_IRQ_ENABLE (0x00000001)
-/* OS Timer Interrupt Acknowledge Register 32bit (-/W) */
-#define U300_TIMER_APP_OSTIA (0x0020)
-#define U300_TIMER_APP_OSTIA_IRQ_ACK (0x00000080)
-
-/* Reset DD Timer 32bit (-/W) */
-#define U300_TIMER_APP_RDDT (0x0040)
-#define U300_TIMER_APP_RDDT_TIMER_RESET (0x00000000)
-/* Enable DD Timer 32bit (-/W) */
-#define U300_TIMER_APP_EDDT (0x0044)
-#define U300_TIMER_APP_EDDT_TIMER_ENABLE (0x00000000)
-/* Disable DD Timer 32bit (-/W) */
-#define U300_TIMER_APP_DDDT (0x0048)
-#define U300_TIMER_APP_DDDT_TIMER_DISABLE (0x00000000)
-/* DD Timer Mode Register 32bit (-/W) */
-#define U300_TIMER_APP_SDDTM (0x004c)
-#define U300_TIMER_APP_SDDTM_MODE_CONTINUOUS (0x00000000)
-#define U300_TIMER_APP_SDDTM_MODE_ONE_SHOT (0x00000001)
-/* DD Timer Status Register 32bit (R/-) */
-#define U300_TIMER_APP_DDTS (0x0050)
-#define U300_TIMER_APP_DDTS_TIMER_STATE_MASK (0x0000000F)
-#define U300_TIMER_APP_DDTS_TIMER_STATE_IDLE (0x00000001)
-#define U300_TIMER_APP_DDTS_TIMER_STATE_ACTIVE (0x00000002)
-#define U300_TIMER_APP_DDTS_ENABLE_IND (0x00000010)
-#define U300_TIMER_APP_DDTS_MODE_MASK (0x00000020)
-#define U300_TIMER_APP_DDTS_MODE_CONTINUOUS (0x00000000)
-#define U300_TIMER_APP_DDTS_MODE_ONE_SHOT (0x00000020)
-#define U300_TIMER_APP_DDTS_IRQ_ENABLED_IND (0x00000040)
-#define U300_TIMER_APP_DDTS_IRQ_PENDING_IND (0x00000080)
-/* DD Timer Current Count Register 32bit (R/-) */
-#define U300_TIMER_APP_DDTCC (0x0054)
-/* DD Timer Terminal Count Register 32bit (R/W) */
-#define U300_TIMER_APP_DDTTC (0x0058)
-/* DD Timer Interrupt Enable Register 32bit (-/W) */
-#define U300_TIMER_APP_DDTIE (0x005c)
-#define U300_TIMER_APP_DDTIE_IRQ_DISABLE (0x00000000)
-#define U300_TIMER_APP_DDTIE_IRQ_ENABLE (0x00000001)
-/* DD Timer Interrupt Acknowledge Register 32bit (-/W) */
-#define U300_TIMER_APP_DDTIA (0x0060)
-#define U300_TIMER_APP_DDTIA_IRQ_ACK (0x00000080)
-
-/* Reset GP1 Timer 32bit (-/W) */
-#define U300_TIMER_APP_RGPT1 (0x0080)
-#define U300_TIMER_APP_RGPT1_TIMER_RESET (0x00000000)
-/* Enable GP1 Timer 32bit (-/W) */
-#define U300_TIMER_APP_EGPT1 (0x0084)
-#define U300_TIMER_APP_EGPT1_TIMER_ENABLE (0x00000000)
-/* Disable GP1 Timer 32bit (-/W) */
-#define U300_TIMER_APP_DGPT1 (0x0088)
-#define U300_TIMER_APP_DGPT1_TIMER_DISABLE (0x00000000)
-/* GP1 Timer Mode Register 32bit (-/W) */
-#define U300_TIMER_APP_SGPT1M (0x008c)
-#define U300_TIMER_APP_SGPT1M_MODE_CONTINUOUS (0x00000000)
-#define U300_TIMER_APP_SGPT1M_MODE_ONE_SHOT (0x00000001)
-/* GP1 Timer Status Register 32bit (R/-) */
-#define U300_TIMER_APP_GPT1S (0x0090)
-#define U300_TIMER_APP_GPT1S_TIMER_STATE_MASK (0x0000000F)
-#define U300_TIMER_APP_GPT1S_TIMER_STATE_IDLE (0x00000001)
-#define U300_TIMER_APP_GPT1S_TIMER_STATE_ACTIVE (0x00000002)
-#define U300_TIMER_APP_GPT1S_ENABLE_IND (0x00000010)
-#define U300_TIMER_APP_GPT1S_MODE_MASK (0x00000020)
-#define U300_TIMER_APP_GPT1S_MODE_CONTINUOUS (0x00000000)
-#define U300_TIMER_APP_GPT1S_MODE_ONE_SHOT (0x00000020)
-#define U300_TIMER_APP_GPT1S_IRQ_ENABLED_IND (0x00000040)
-#define U300_TIMER_APP_GPT1S_IRQ_PENDING_IND (0x00000080)
-/* GP1 Timer Current Count Register 32bit (R/-) */
-#define U300_TIMER_APP_GPT1CC (0x0094)
-/* GP1 Timer Terminal Count Register 32bit (R/W) */
-#define U300_TIMER_APP_GPT1TC (0x0098)
-/* GP1 Timer Interrupt Enable Register 32bit (-/W) */
-#define U300_TIMER_APP_GPT1IE (0x009c)
-#define U300_TIMER_APP_GPT1IE_IRQ_DISABLE (0x00000000)
-#define U300_TIMER_APP_GPT1IE_IRQ_ENABLE (0x00000001)
-/* GP1 Timer Interrupt Acknowledge Register 32bit (-/W) */
-#define U300_TIMER_APP_GPT1IA (0x00a0)
-#define U300_TIMER_APP_GPT1IA_IRQ_ACK (0x00000080)
-
-/* Reset GP2 Timer 32bit (-/W) */
-#define U300_TIMER_APP_RGPT2 (0x00c0)
-#define U300_TIMER_APP_RGPT2_TIMER_RESET (0x00000000)
-/* Enable GP2 Timer 32bit (-/W) */
-#define U300_TIMER_APP_EGPT2 (0x00c4)
-#define U300_TIMER_APP_EGPT2_TIMER_ENABLE (0x00000000)
-/* Disable GP2 Timer 32bit (-/W) */
-#define U300_TIMER_APP_DGPT2 (0x00c8)
-#define U300_TIMER_APP_DGPT2_TIMER_DISABLE (0x00000000)
-/* GP2 Timer Mode Register 32bit (-/W) */
-#define U300_TIMER_APP_SGPT2M (0x00cc)
-#define U300_TIMER_APP_SGPT2M_MODE_CONTINUOUS (0x00000000)
-#define U300_TIMER_APP_SGPT2M_MODE_ONE_SHOT (0x00000001)
-/* GP2 Timer Status Register 32bit (R/-) */
-#define U300_TIMER_APP_GPT2S (0x00d0)
-#define U300_TIMER_APP_GPT2S_TIMER_STATE_MASK (0x0000000F)
-#define U300_TIMER_APP_GPT2S_TIMER_STATE_IDLE (0x00000001)
-#define U300_TIMER_APP_GPT2S_TIMER_STATE_ACTIVE (0x00000002)
-#define U300_TIMER_APP_GPT2S_ENABLE_IND (0x00000010)
-#define U300_TIMER_APP_GPT2S_MODE_MASK (0x00000020)
-#define U300_TIMER_APP_GPT2S_MODE_CONTINUOUS (0x00000000)
-#define U300_TIMER_APP_GPT2S_MODE_ONE_SHOT (0x00000020)
-#define U300_TIMER_APP_GPT2S_IRQ_ENABLED_IND (0x00000040)
-#define U300_TIMER_APP_GPT2S_IRQ_PENDING_IND (0x00000080)
-/* GP2 Timer Current Count Register 32bit (R/-) */
-#define U300_TIMER_APP_GPT2CC (0x00d4)
-/* GP2 Timer Terminal Count Register 32bit (R/W) */
-#define U300_TIMER_APP_GPT2TC (0x00d8)
-/* GP2 Timer Interrupt Enable Register 32bit (-/W) */
-#define U300_TIMER_APP_GPT2IE (0x00dc)
-#define U300_TIMER_APP_GPT2IE_IRQ_DISABLE (0x00000000)
-#define U300_TIMER_APP_GPT2IE_IRQ_ENABLE (0x00000001)
-/* GP2 Timer Interrupt Acknowledge Register 32bit (-/W) */
-#define U300_TIMER_APP_GPT2IA (0x00e0)
-#define U300_TIMER_APP_GPT2IA_IRQ_ACK (0x00000080)
-
-/* Clock request control register - all four timers */
-#define U300_TIMER_APP_CRC (0x100)
-#define U300_TIMER_APP_CRC_CLOCK_REQUEST_ENABLE (0x00000001)
-
-static void __iomem *u300_timer_base;
-
-struct u300_clockevent_data {
- struct clock_event_device cevd;
- unsigned ticks_per_jiffy;
-};
-
-static int u300_shutdown(struct clock_event_device *evt)
-{
- /* Disable interrupts on GP1 */
- writel(U300_TIMER_APP_GPT1IE_IRQ_DISABLE,
- u300_timer_base + U300_TIMER_APP_GPT1IE);
- /* Disable GP1 */
- writel(U300_TIMER_APP_DGPT1_TIMER_DISABLE,
- u300_timer_base + U300_TIMER_APP_DGPT1);
- return 0;
-}
-
-/*
- * If we have oneshot timer active, the oneshot scheduling function
- * u300_set_next_event() is called immediately after.
- */
-static int u300_set_oneshot(struct clock_event_device *evt)
-{
- /* Just return; here? */
- /*
- * The actual event will be programmed by the next event hook,
- * so we just set a dummy value somewhere at the end of the
- * universe here.
- */
- /* Disable interrupts on GPT1 */
- writel(U300_TIMER_APP_GPT1IE_IRQ_DISABLE,
- u300_timer_base + U300_TIMER_APP_GPT1IE);
- /* Disable GP1 while we're reprogramming it. */
- writel(U300_TIMER_APP_DGPT1_TIMER_DISABLE,
- u300_timer_base + U300_TIMER_APP_DGPT1);
- /*
- * Expire far in the future, u300_set_next_event() will be
- * called soon...
- */
- writel(0xFFFFFFFF, u300_timer_base + U300_TIMER_APP_GPT1TC);
- /* We run one shot per tick here! */
- writel(U300_TIMER_APP_SGPT1M_MODE_ONE_SHOT,
- u300_timer_base + U300_TIMER_APP_SGPT1M);
- /* Enable interrupts for this timer */
- writel(U300_TIMER_APP_GPT1IE_IRQ_ENABLE,
- u300_timer_base + U300_TIMER_APP_GPT1IE);
- /* Enable timer */
- writel(U300_TIMER_APP_EGPT1_TIMER_ENABLE,
- u300_timer_base + U300_TIMER_APP_EGPT1);
- return 0;
-}
-
-static int u300_set_periodic(struct clock_event_device *evt)
-{
- struct u300_clockevent_data *cevdata =
- container_of(evt, struct u300_clockevent_data, cevd);
-
- /* Disable interrupts on GPT1 */
- writel(U300_TIMER_APP_GPT1IE_IRQ_DISABLE,
- u300_timer_base + U300_TIMER_APP_GPT1IE);
- /* Disable GP1 while we're reprogramming it. */
- writel(U300_TIMER_APP_DGPT1_TIMER_DISABLE,
- u300_timer_base + U300_TIMER_APP_DGPT1);
- /*
- * Set the periodic mode to a certain number of ticks per
- * jiffy.
- */
- writel(cevdata->ticks_per_jiffy,
- u300_timer_base + U300_TIMER_APP_GPT1TC);
- /*
- * Set continuous mode, so the timer keeps triggering
- * interrupts.
- */
- writel(U300_TIMER_APP_SGPT1M_MODE_CONTINUOUS,
- u300_timer_base + U300_TIMER_APP_SGPT1M);
- /* Enable timer interrupts */
- writel(U300_TIMER_APP_GPT1IE_IRQ_ENABLE,
- u300_timer_base + U300_TIMER_APP_GPT1IE);
- /* Then enable the OS timer again */
- writel(U300_TIMER_APP_EGPT1_TIMER_ENABLE,
- u300_timer_base + U300_TIMER_APP_EGPT1);
- return 0;
-}
-
-/*
- * The app timer in one shot mode obviously has to be reprogrammed
- * in EXACTLY this sequence to work properly. Do NOT try to e.g. replace
- * the interrupt disable + timer disable commands with a reset command,
- * it will fail miserably. Apparently (and I found this the hard way)
- * the timer is very sensitive to the instruction order, though you don't
- * get that impression from the data sheet.
- */
-static int u300_set_next_event(unsigned long cycles,
- struct clock_event_device *evt)
-
-{
- /* Disable interrupts on GPT1 */
- writel(U300_TIMER_APP_GPT1IE_IRQ_DISABLE,
- u300_timer_base + U300_TIMER_APP_GPT1IE);
- /* Disable GP1 while we're reprogramming it. */
- writel(U300_TIMER_APP_DGPT1_TIMER_DISABLE,
- u300_timer_base + U300_TIMER_APP_DGPT1);
- /* Reset the General Purpose timer 1. */
- writel(U300_TIMER_APP_RGPT1_TIMER_RESET,
- u300_timer_base + U300_TIMER_APP_RGPT1);
- /* IRQ in n * cycles */
- writel(cycles, u300_timer_base + U300_TIMER_APP_GPT1TC);
- /*
- * We run one shot per tick here! (This is necessary to reconfigure,
- * the timer will tilt if you don't!)
- */
- writel(U300_TIMER_APP_SGPT1M_MODE_ONE_SHOT,
- u300_timer_base + U300_TIMER_APP_SGPT1M);
- /* Enable timer interrupts */
- writel(U300_TIMER_APP_GPT1IE_IRQ_ENABLE,
- u300_timer_base + U300_TIMER_APP_GPT1IE);
- /* Then enable the OS timer again */
- writel(U300_TIMER_APP_EGPT1_TIMER_ENABLE,
- u300_timer_base + U300_TIMER_APP_EGPT1);
- return 0;
-}
-
-static struct u300_clockevent_data u300_clockevent_data = {
- /* Use general purpose timer 1 as clock event */
- .cevd = {
- .name = "GPT1",
- /* Reasonably fast and accurate clock event */
- .rating = 300,
- .features = CLOCK_EVT_FEAT_PERIODIC |
- CLOCK_EVT_FEAT_ONESHOT,
- .set_next_event = u300_set_next_event,
- .set_state_shutdown = u300_shutdown,
- .set_state_periodic = u300_set_periodic,
- .set_state_oneshot = u300_set_oneshot,
- },
-};
-
-/* Clock event timer interrupt handler */
-static irqreturn_t u300_timer_interrupt(int irq, void *dev_id)
-{
- struct clock_event_device *evt = &u300_clockevent_data.cevd;
- /* ACK/Clear timer IRQ for the APP GPT1 Timer */
-
- writel(U300_TIMER_APP_GPT1IA_IRQ_ACK,
- u300_timer_base + U300_TIMER_APP_GPT1IA);
- evt->event_handler(evt);
- return IRQ_HANDLED;
-}
-
-/*
- * Override the global weak sched_clock symbol with this
- * local implementation which uses the clocksource to get some
- * better resolution when scheduling the kernel. We accept that
- * this wraps around for now, since it is just a relative time
- * stamp. (Inspired by OMAP implementation.)
- */
-
-static u64 notrace u300_read_sched_clock(void)
-{
- return readl(u300_timer_base + U300_TIMER_APP_GPT2CC);
-}
-
-static unsigned long u300_read_current_timer(void)
-{
- return readl(u300_timer_base + U300_TIMER_APP_GPT2CC);
-}
-
-static struct delay_timer u300_delay_timer;
-
-/*
- * This sets up the system timers, clock source and clock event.
- */
-static int __init u300_timer_init_of(struct device_node *np)
-{
- unsigned int irq;
- struct clk *clk;
- unsigned long rate;
- int ret;
-
- u300_timer_base = of_iomap(np, 0);
- if (!u300_timer_base) {
- pr_err("could not ioremap system timer\n");
- return -ENXIO;
- }
-
- /* Get the IRQ for the GP1 timer */
- irq = irq_of_parse_and_map(np, 2);
- if (!irq) {
- pr_err("no IRQ for system timer\n");
- return -EINVAL;
- }
-
- pr_info("U300 GP1 timer @ base: %p, IRQ: %u\n", u300_timer_base, irq);
-
- /* Clock the interrupt controller */
- clk = of_clk_get(np, 0);
- if (IS_ERR(clk))
- return PTR_ERR(clk);
-
- ret = clk_prepare_enable(clk);
- if (ret)
- return ret;
-
- rate = clk_get_rate(clk);
-
- u300_clockevent_data.ticks_per_jiffy = DIV_ROUND_CLOSEST(rate, HZ);
-
- sched_clock_register(u300_read_sched_clock, 32, rate);
-
- u300_delay_timer.read_current_timer = &u300_read_current_timer;
- u300_delay_timer.freq = rate;
- register_current_timer_delay(&u300_delay_timer);
-
- /*
- * Disable the "OS" and "DD" timers - these are designed for Symbian!
- * Example usage in cnh1601578 cpu subsystem pd_timer_app.c
- */
- writel(U300_TIMER_APP_CRC_CLOCK_REQUEST_ENABLE,
- u300_timer_base + U300_TIMER_APP_CRC);
- writel(U300_TIMER_APP_ROST_TIMER_RESET,
- u300_timer_base + U300_TIMER_APP_ROST);
- writel(U300_TIMER_APP_DOST_TIMER_DISABLE,
- u300_timer_base + U300_TIMER_APP_DOST);
- writel(U300_TIMER_APP_RDDT_TIMER_RESET,
- u300_timer_base + U300_TIMER_APP_RDDT);
- writel(U300_TIMER_APP_DDDT_TIMER_DISABLE,
- u300_timer_base + U300_TIMER_APP_DDDT);
-
- /* Reset the General Purpose timer 1. */
- writel(U300_TIMER_APP_RGPT1_TIMER_RESET,
- u300_timer_base + U300_TIMER_APP_RGPT1);
-
- /* Set up the IRQ handler */
- ret = request_irq(irq, u300_timer_interrupt,
- IRQF_TIMER | IRQF_IRQPOLL, "U300 Timer Tick", NULL);
- if (ret)
- return ret;
-
- /* Reset the General Purpose timer 2 */
- writel(U300_TIMER_APP_RGPT2_TIMER_RESET,
- u300_timer_base + U300_TIMER_APP_RGPT2);
- /* Set this timer to run around forever */
- writel(0xFFFFFFFFU, u300_timer_base + U300_TIMER_APP_GPT2TC);
- /* Set continuous mode so it wraps around */
- writel(U300_TIMER_APP_SGPT2M_MODE_CONTINUOUS,
- u300_timer_base + U300_TIMER_APP_SGPT2M);
- /* Disable timer interrupts */
- writel(U300_TIMER_APP_GPT2IE_IRQ_DISABLE,
- u300_timer_base + U300_TIMER_APP_GPT2IE);
- /* Then enable the GP2 timer to use as a free running us counter */
- writel(U300_TIMER_APP_EGPT2_TIMER_ENABLE,
- u300_timer_base + U300_TIMER_APP_EGPT2);
-
- /* Use general purpose timer 2 as clock source */
- ret = clocksource_mmio_init(u300_timer_base + U300_TIMER_APP_GPT2CC,
- "GPT2", rate, 300, 32, clocksource_mmio_readl_up);
- if (ret) {
- pr_err("timer: failed to initialize U300 clock source\n");
- return ret;
- }
-
- /* Configure and register the clockevent */
- clockevents_config_and_register(&u300_clockevent_data.cevd, rate,
- 1, 0xffffffff);
-
- /*
- * TODO: init and register the rest of the timers too, they can be
- * used by hrtimers!
- */
- return 0;
-}
-
-TIMER_OF_DECLARE(u300_timer, "stericsson,u300-apptimer",
- u300_timer_init_of);
--
2.29.2
_______________________________________________
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^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH 2/4] timer: remove tango driver
2021-01-20 13:15 [PATCH 0/4] clocksource: remove obsolete drivers Arnd Bergmann
2021-01-20 13:15 ` [PATCH 1/4] timer: remove u300 driver Arnd Bergmann
@ 2021-01-20 13:15 ` Arnd Bergmann
2021-01-21 13:48 ` Måns Rullgård
2021-01-20 13:15 ` [PATCH 3/4] timer: remove sirf atlas driver Arnd Bergmann
` (2 subsequent siblings)
4 siblings, 1 reply; 12+ messages in thread
From: Arnd Bergmann @ 2021-01-20 13:15 UTC (permalink / raw)
To: linux-arm-kernel, linux-kernel, Daniel Lezcano, Thomas Gleixner
Cc: Mans Rullgard, Arnd Bergmann, Marc Gonzalez
From: Arnd Bergmann <arnd@arndb.de>
The tango platform is getting removed, so the driver is no
longer needed.
Cc: Marc Gonzalez <marc.w.gonzalez@free.fr>
Cc: Mans Rullgard <mans@mansr.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/clocksource/Kconfig | 8 ----
drivers/clocksource/Makefile | 1 -
drivers/clocksource/timer-tango-xtal.c | 57 --------------------------
3 files changed, 66 deletions(-)
delete mode 100644 drivers/clocksource/timer-tango-xtal.c
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 824a0f6b77d4..1feadd067677 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -560,14 +560,6 @@ config CLKSRC_MIPS_GIC
select CLOCKSOURCE_WATCHDOG
select TIMER_OF
-config CLKSRC_TANGO_XTAL
- bool "Clocksource for Tango SoC" if COMPILE_TEST
- depends on ARM
- select TIMER_OF
- select CLKSRC_MMIO
- help
- This enables the clocksource for Tango SoC.
-
config CLKSRC_PXA
bool "Clocksource for PXA or SA-11x0 platform" if COMPILE_TEST
depends on HAS_IOMEM
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 41c154478a1a..1089f2ed8560 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -72,7 +72,6 @@ obj-$(CONFIG_KEYSTONE_TIMER) += timer-keystone.o
obj-$(CONFIG_INTEGRATOR_AP_TIMER) += timer-integrator-ap.o
obj-$(CONFIG_CLKSRC_VERSATILE) += timer-versatile.o
obj-$(CONFIG_CLKSRC_MIPS_GIC) += mips-gic-timer.o
-obj-$(CONFIG_CLKSRC_TANGO_XTAL) += timer-tango-xtal.o
obj-$(CONFIG_CLKSRC_IMX_GPT) += timer-imx-gpt.o
obj-$(CONFIG_CLKSRC_IMX_TPM) += timer-imx-tpm.o
obj-$(CONFIG_TIMER_IMX_SYS_CTR) += timer-imx-sysctr.o
diff --git a/drivers/clocksource/timer-tango-xtal.c b/drivers/clocksource/timer-tango-xtal.c
deleted file mode 100644
index 3f94e454ef99..000000000000
--- a/drivers/clocksource/timer-tango-xtal.c
+++ /dev/null
@@ -1,57 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/clocksource.h>
-#include <linux/sched_clock.h>
-#include <linux/of_address.h>
-#include <linux/printk.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/clk.h>
-
-static void __iomem *xtal_in_cnt;
-static struct delay_timer delay_timer;
-
-static unsigned long notrace read_xtal_counter(void)
-{
- return readl_relaxed(xtal_in_cnt);
-}
-
-static u64 notrace read_sched_clock(void)
-{
- return read_xtal_counter();
-}
-
-static int __init tango_clocksource_init(struct device_node *np)
-{
- struct clk *clk;
- int xtal_freq, ret;
-
- xtal_in_cnt = of_iomap(np, 0);
- if (xtal_in_cnt == NULL) {
- pr_err("%pOF: invalid address\n", np);
- return -ENXIO;
- }
-
- clk = of_clk_get(np, 0);
- if (IS_ERR(clk)) {
- pr_err("%pOF: invalid clock\n", np);
- return PTR_ERR(clk);
- }
-
- xtal_freq = clk_get_rate(clk);
- delay_timer.freq = xtal_freq;
- delay_timer.read_current_timer = read_xtal_counter;
-
- ret = clocksource_mmio_init(xtal_in_cnt, "tango-xtal", xtal_freq, 350,
- 32, clocksource_mmio_readl_up);
- if (ret) {
- pr_err("%pOF: registration failed\n", np);
- return ret;
- }
-
- sched_clock_register(read_sched_clock, 32, xtal_freq);
- register_current_timer_delay(&delay_timer);
-
- return 0;
-}
-
-TIMER_OF_DECLARE(tango, "sigma,tick-counter", tango_clocksource_init);
--
2.29.2
_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 12+ messages in thread* Re: [PATCH 2/4] timer: remove tango driver
2021-01-20 13:15 ` [PATCH 2/4] timer: remove tango driver Arnd Bergmann
@ 2021-01-21 13:48 ` Måns Rullgård
0 siblings, 0 replies; 12+ messages in thread
From: Måns Rullgård @ 2021-01-21 13:48 UTC (permalink / raw)
To: Arnd Bergmann
Cc: Arnd Bergmann, Marc Gonzalez, Daniel Lezcano, linux-kernel,
Thomas Gleixner, linux-arm-kernel
Arnd Bergmann <arnd@kernel.org> writes:
> From: Arnd Bergmann <arnd@arndb.de>
>
> The tango platform is getting removed, so the driver is no
> longer needed.
>
> Cc: Marc Gonzalez <marc.w.gonzalez@free.fr>
> Cc: Mans Rullgard <mans@mansr.com>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Mans Rullgard <mans@mansr.com>
> ---
> drivers/clocksource/Kconfig | 8 ----
> drivers/clocksource/Makefile | 1 -
> drivers/clocksource/timer-tango-xtal.c | 57 --------------------------
> 3 files changed, 66 deletions(-)
> delete mode 100644 drivers/clocksource/timer-tango-xtal.c
>
> diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
> index 824a0f6b77d4..1feadd067677 100644
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig
> @@ -560,14 +560,6 @@ config CLKSRC_MIPS_GIC
> select CLOCKSOURCE_WATCHDOG
> select TIMER_OF
>
> -config CLKSRC_TANGO_XTAL
> - bool "Clocksource for Tango SoC" if COMPILE_TEST
> - depends on ARM
> - select TIMER_OF
> - select CLKSRC_MMIO
> - help
> - This enables the clocksource for Tango SoC.
> -
> config CLKSRC_PXA
> bool "Clocksource for PXA or SA-11x0 platform" if COMPILE_TEST
> depends on HAS_IOMEM
> diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
> index 41c154478a1a..1089f2ed8560 100644
> --- a/drivers/clocksource/Makefile
> +++ b/drivers/clocksource/Makefile
> @@ -72,7 +72,6 @@ obj-$(CONFIG_KEYSTONE_TIMER) += timer-keystone.o
> obj-$(CONFIG_INTEGRATOR_AP_TIMER) += timer-integrator-ap.o
> obj-$(CONFIG_CLKSRC_VERSATILE) += timer-versatile.o
> obj-$(CONFIG_CLKSRC_MIPS_GIC) += mips-gic-timer.o
> -obj-$(CONFIG_CLKSRC_TANGO_XTAL) += timer-tango-xtal.o
> obj-$(CONFIG_CLKSRC_IMX_GPT) += timer-imx-gpt.o
> obj-$(CONFIG_CLKSRC_IMX_TPM) += timer-imx-tpm.o
> obj-$(CONFIG_TIMER_IMX_SYS_CTR) += timer-imx-sysctr.o
> diff --git a/drivers/clocksource/timer-tango-xtal.c b/drivers/clocksource/timer-tango-xtal.c
> deleted file mode 100644
> index 3f94e454ef99..000000000000
> --- a/drivers/clocksource/timer-tango-xtal.c
> +++ /dev/null
> @@ -1,57 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0
> -#include <linux/clocksource.h>
> -#include <linux/sched_clock.h>
> -#include <linux/of_address.h>
> -#include <linux/printk.h>
> -#include <linux/delay.h>
> -#include <linux/init.h>
> -#include <linux/clk.h>
> -
> -static void __iomem *xtal_in_cnt;
> -static struct delay_timer delay_timer;
> -
> -static unsigned long notrace read_xtal_counter(void)
> -{
> - return readl_relaxed(xtal_in_cnt);
> -}
> -
> -static u64 notrace read_sched_clock(void)
> -{
> - return read_xtal_counter();
> -}
> -
> -static int __init tango_clocksource_init(struct device_node *np)
> -{
> - struct clk *clk;
> - int xtal_freq, ret;
> -
> - xtal_in_cnt = of_iomap(np, 0);
> - if (xtal_in_cnt == NULL) {
> - pr_err("%pOF: invalid address\n", np);
> - return -ENXIO;
> - }
> -
> - clk = of_clk_get(np, 0);
> - if (IS_ERR(clk)) {
> - pr_err("%pOF: invalid clock\n", np);
> - return PTR_ERR(clk);
> - }
> -
> - xtal_freq = clk_get_rate(clk);
> - delay_timer.freq = xtal_freq;
> - delay_timer.read_current_timer = read_xtal_counter;
> -
> - ret = clocksource_mmio_init(xtal_in_cnt, "tango-xtal", xtal_freq, 350,
> - 32, clocksource_mmio_readl_up);
> - if (ret) {
> - pr_err("%pOF: registration failed\n", np);
> - return ret;
> - }
> -
> - sched_clock_register(read_sched_clock, 32, xtal_freq);
> - register_current_timer_delay(&delay_timer);
> -
> - return 0;
> -}
> -
> -TIMER_OF_DECLARE(tango, "sigma,tick-counter", tango_clocksource_init);
> --
>
> 2.29.2
>
--
Måns Rullgård
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH 3/4] timer: remove sirf atlas driver
2021-01-20 13:15 [PATCH 0/4] clocksource: remove obsolete drivers Arnd Bergmann
2021-01-20 13:15 ` [PATCH 1/4] timer: remove u300 driver Arnd Bergmann
2021-01-20 13:15 ` [PATCH 2/4] timer: remove tango driver Arnd Bergmann
@ 2021-01-20 13:15 ` Arnd Bergmann
2021-01-20 21:21 ` Barry Song
2021-01-20 13:15 ` [PATCH 4/4] timer: remove sirf prima driver Arnd Bergmann
2021-02-03 8:37 ` [PATCH 0/4] clocksource: remove obsolete drivers Daniel Lezcano
4 siblings, 1 reply; 12+ messages in thread
From: Arnd Bergmann @ 2021-01-20 13:15 UTC (permalink / raw)
To: linux-arm-kernel, linux-kernel, Daniel Lezcano, Thomas Gleixner
Cc: Barry Song, Arnd Bergmann
From: Arnd Bergmann <arnd@arndb.de>
The CSR SiRF prima2/atlas platforms are getting removed, so this driver
is no longer needed.
Cc: Barry Song <baohua@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/clocksource/Kconfig | 6 -
drivers/clocksource/Makefile | 1 -
drivers/clocksource/timer-atlas7.c | 281 -----------------------------
3 files changed, 288 deletions(-)
delete mode 100644 drivers/clocksource/timer-atlas7.c
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 1feadd067677..ac6de462591a 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -197,12 +197,6 @@ config CLPS711X_TIMER
help
Enables support for the Cirrus Logic PS711 timer.
-config ATLAS7_TIMER
- bool "Atlas7 timer driver" if COMPILE_TEST
- select CLKSRC_MMIO
- help
- Enables support for the Atlas7 timer.
-
config MXS_TIMER
bool "MXS timer driver" if COMPILE_TEST
select CLKSRC_MMIO
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 1089f2ed8560..49496637700f 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -30,7 +30,6 @@ obj-$(CONFIG_ARMADA_370_XP_TIMER) += timer-armada-370-xp.o
obj-$(CONFIG_ORION_TIMER) += timer-orion.o
obj-$(CONFIG_BCM2835_TIMER) += bcm2835_timer.o
obj-$(CONFIG_CLPS711X_TIMER) += clps711x-timer.o
-obj-$(CONFIG_ATLAS7_TIMER) += timer-atlas7.o
obj-$(CONFIG_MXS_TIMER) += mxs_timer.o
obj-$(CONFIG_CLKSRC_PXA) += timer-pxa.o
obj-$(CONFIG_PRIMA2_TIMER) += timer-prima2.o
diff --git a/drivers/clocksource/timer-atlas7.c b/drivers/clocksource/timer-atlas7.c
deleted file mode 100644
index c21c91c2bc56..000000000000
--- a/drivers/clocksource/timer-atlas7.c
+++ /dev/null
@@ -1,281 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * System timer for CSR SiRFprimaII
- *
- * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
- */
-
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/clockchips.h>
-#include <linux/clocksource.h>
-#include <linux/cpu.h>
-#include <linux/bitops.h>
-#include <linux/irq.h>
-#include <linux/clk.h>
-#include <linux/slab.h>
-#include <linux/of.h>
-#include <linux/of_irq.h>
-#include <linux/of_address.h>
-#include <linux/sched_clock.h>
-
-#define SIRFSOC_TIMER_32COUNTER_0_CTRL 0x0000
-#define SIRFSOC_TIMER_32COUNTER_1_CTRL 0x0004
-#define SIRFSOC_TIMER_MATCH_0 0x0018
-#define SIRFSOC_TIMER_MATCH_1 0x001c
-#define SIRFSOC_TIMER_COUNTER_0 0x0048
-#define SIRFSOC_TIMER_COUNTER_1 0x004c
-#define SIRFSOC_TIMER_INTR_STATUS 0x0060
-#define SIRFSOC_TIMER_WATCHDOG_EN 0x0064
-#define SIRFSOC_TIMER_64COUNTER_CTRL 0x0068
-#define SIRFSOC_TIMER_64COUNTER_LO 0x006c
-#define SIRFSOC_TIMER_64COUNTER_HI 0x0070
-#define SIRFSOC_TIMER_64COUNTER_LOAD_LO 0x0074
-#define SIRFSOC_TIMER_64COUNTER_LOAD_HI 0x0078
-#define SIRFSOC_TIMER_64COUNTER_RLATCHED_LO 0x007c
-#define SIRFSOC_TIMER_64COUNTER_RLATCHED_HI 0x0080
-
-#define SIRFSOC_TIMER_REG_CNT 6
-
-static unsigned long atlas7_timer_rate;
-
-static const u32 sirfsoc_timer_reg_list[SIRFSOC_TIMER_REG_CNT] = {
- SIRFSOC_TIMER_WATCHDOG_EN,
- SIRFSOC_TIMER_32COUNTER_0_CTRL,
- SIRFSOC_TIMER_32COUNTER_1_CTRL,
- SIRFSOC_TIMER_64COUNTER_CTRL,
- SIRFSOC_TIMER_64COUNTER_RLATCHED_LO,
- SIRFSOC_TIMER_64COUNTER_RLATCHED_HI,
-};
-
-static u32 sirfsoc_timer_reg_val[SIRFSOC_TIMER_REG_CNT];
-
-static void __iomem *sirfsoc_timer_base;
-
-/* disable count and interrupt */
-static inline void sirfsoc_timer_count_disable(int idx)
-{
- writel_relaxed(readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_32COUNTER_0_CTRL + 4 * idx) & ~0x7,
- sirfsoc_timer_base + SIRFSOC_TIMER_32COUNTER_0_CTRL + 4 * idx);
-}
-
-/* enable count and interrupt */
-static inline void sirfsoc_timer_count_enable(int idx)
-{
- writel_relaxed(readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_32COUNTER_0_CTRL + 4 * idx) | 0x3,
- sirfsoc_timer_base + SIRFSOC_TIMER_32COUNTER_0_CTRL + 4 * idx);
-}
-
-/* timer interrupt handler */
-static irqreturn_t sirfsoc_timer_interrupt(int irq, void *dev_id)
-{
- struct clock_event_device *ce = dev_id;
- int cpu = smp_processor_id();
-
- /* clear timer interrupt */
- writel_relaxed(BIT(cpu), sirfsoc_timer_base + SIRFSOC_TIMER_INTR_STATUS);
-
- if (clockevent_state_oneshot(ce))
- sirfsoc_timer_count_disable(cpu);
-
- ce->event_handler(ce);
-
- return IRQ_HANDLED;
-}
-
-/* read 64-bit timer counter */
-static u64 sirfsoc_timer_read(struct clocksource *cs)
-{
- u64 cycles;
-
- writel_relaxed((readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_CTRL) |
- BIT(0)) & ~BIT(1), sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_CTRL);
-
- cycles = readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_RLATCHED_HI);
- cycles = (cycles << 32) | readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_RLATCHED_LO);
-
- return cycles;
-}
-
-static int sirfsoc_timer_set_next_event(unsigned long delta,
- struct clock_event_device *ce)
-{
- int cpu = smp_processor_id();
-
- /* disable timer first, then modify the related registers */
- sirfsoc_timer_count_disable(cpu);
-
- writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_COUNTER_0 +
- 4 * cpu);
- writel_relaxed(delta, sirfsoc_timer_base + SIRFSOC_TIMER_MATCH_0 +
- 4 * cpu);
-
- /* enable the tick */
- sirfsoc_timer_count_enable(cpu);
-
- return 0;
-}
-
-/* Oneshot is enabled in set_next_event */
-static int sirfsoc_timer_shutdown(struct clock_event_device *evt)
-{
- sirfsoc_timer_count_disable(smp_processor_id());
- return 0;
-}
-
-static void sirfsoc_clocksource_suspend(struct clocksource *cs)
-{
- int i;
-
- for (i = 0; i < SIRFSOC_TIMER_REG_CNT; i++)
- sirfsoc_timer_reg_val[i] = readl_relaxed(sirfsoc_timer_base + sirfsoc_timer_reg_list[i]);
-}
-
-static void sirfsoc_clocksource_resume(struct clocksource *cs)
-{
- int i;
-
- for (i = 0; i < SIRFSOC_TIMER_REG_CNT - 2; i++)
- writel_relaxed(sirfsoc_timer_reg_val[i], sirfsoc_timer_base + sirfsoc_timer_reg_list[i]);
-
- writel_relaxed(sirfsoc_timer_reg_val[SIRFSOC_TIMER_REG_CNT - 2],
- sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_LOAD_LO);
- writel_relaxed(sirfsoc_timer_reg_val[SIRFSOC_TIMER_REG_CNT - 1],
- sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_LOAD_HI);
-
- writel_relaxed(readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_CTRL) |
- BIT(1) | BIT(0), sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_CTRL);
-}
-
-static struct clock_event_device __percpu *sirfsoc_clockevent;
-
-static struct clocksource sirfsoc_clocksource = {
- .name = "sirfsoc_clocksource",
- .rating = 200,
- .mask = CLOCKSOURCE_MASK(64),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
- .read = sirfsoc_timer_read,
- .suspend = sirfsoc_clocksource_suspend,
- .resume = sirfsoc_clocksource_resume,
-};
-
-static unsigned int sirfsoc_timer_irq, sirfsoc_timer1_irq;
-
-static int sirfsoc_local_timer_starting_cpu(unsigned int cpu)
-{
- struct clock_event_device *ce = per_cpu_ptr(sirfsoc_clockevent, cpu);
- unsigned int irq;
- const char *name;
-
- if (cpu == 0) {
- irq = sirfsoc_timer_irq;
- name = "sirfsoc_timer0";
- } else {
- irq = sirfsoc_timer1_irq;
- name = "sirfsoc_timer1";
- }
-
- ce->irq = irq;
- ce->name = "local_timer";
- ce->features = CLOCK_EVT_FEAT_ONESHOT;
- ce->rating = 200;
- ce->set_state_shutdown = sirfsoc_timer_shutdown;
- ce->set_state_oneshot = sirfsoc_timer_shutdown;
- ce->tick_resume = sirfsoc_timer_shutdown;
- ce->set_next_event = sirfsoc_timer_set_next_event;
- clockevents_calc_mult_shift(ce, atlas7_timer_rate, 60);
- ce->max_delta_ns = clockevent_delta2ns(-2, ce);
- ce->max_delta_ticks = (unsigned long)-2;
- ce->min_delta_ns = clockevent_delta2ns(2, ce);
- ce->min_delta_ticks = 2;
- ce->cpumask = cpumask_of(cpu);
-
- BUG_ON(request_irq(ce->irq, sirfsoc_timer_interrupt,
- IRQF_TIMER | IRQF_NOBALANCING, name, ce));
- irq_force_affinity(ce->irq, cpumask_of(cpu));
-
- clockevents_register_device(ce);
- return 0;
-}
-
-static int sirfsoc_local_timer_dying_cpu(unsigned int cpu)
-{
- struct clock_event_device *ce = per_cpu_ptr(sirfsoc_clockevent, cpu);
-
- sirfsoc_timer_count_disable(1);
-
- if (cpu == 0)
- free_irq(sirfsoc_timer_irq, ce);
- else
- free_irq(sirfsoc_timer1_irq, ce);
- return 0;
-}
-
-static int __init sirfsoc_clockevent_init(void)
-{
- sirfsoc_clockevent = alloc_percpu(struct clock_event_device);
- BUG_ON(!sirfsoc_clockevent);
-
- /* Install and invoke hotplug callbacks */
- return cpuhp_setup_state(CPUHP_AP_MARCO_TIMER_STARTING,
- "clockevents/marco:starting",
- sirfsoc_local_timer_starting_cpu,
- sirfsoc_local_timer_dying_cpu);
-}
-
-/* initialize the kernel jiffy timer source */
-static int __init sirfsoc_atlas7_timer_init(struct device_node *np)
-{
- struct clk *clk;
-
- clk = of_clk_get(np, 0);
- BUG_ON(IS_ERR(clk));
-
- BUG_ON(clk_prepare_enable(clk));
-
- atlas7_timer_rate = clk_get_rate(clk);
-
- /* timer dividers: 0, not divided */
- writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_CTRL);
- writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_32COUNTER_0_CTRL);
- writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_32COUNTER_1_CTRL);
-
- /* Initialize timer counters to 0 */
- writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_LOAD_LO);
- writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_LOAD_HI);
- writel_relaxed(readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_CTRL) |
- BIT(1) | BIT(0), sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_CTRL);
- writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_COUNTER_0);
- writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_COUNTER_1);
-
- /* Clear all interrupts */
- writel_relaxed(0xFFFF, sirfsoc_timer_base + SIRFSOC_TIMER_INTR_STATUS);
-
- BUG_ON(clocksource_register_hz(&sirfsoc_clocksource, atlas7_timer_rate));
-
- return sirfsoc_clockevent_init();
-}
-
-static int __init sirfsoc_of_timer_init(struct device_node *np)
-{
- sirfsoc_timer_base = of_iomap(np, 0);
- if (!sirfsoc_timer_base) {
- pr_err("unable to map timer cpu registers\n");
- return -ENXIO;
- }
-
- sirfsoc_timer_irq = irq_of_parse_and_map(np, 0);
- if (!sirfsoc_timer_irq) {
- pr_err("No irq passed for timer0 via DT\n");
- return -EINVAL;
- }
-
- sirfsoc_timer1_irq = irq_of_parse_and_map(np, 1);
- if (!sirfsoc_timer1_irq) {
- pr_err("No irq passed for timer1 via DT\n");
- return -EINVAL;
- }
-
- return sirfsoc_atlas7_timer_init(np);
-}
-TIMER_OF_DECLARE(sirfsoc_atlas7_timer, "sirf,atlas7-tick", sirfsoc_of_timer_init);
--
2.29.2
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^ permalink raw reply related [flat|nested] 12+ messages in thread* Re: [PATCH 3/4] timer: remove sirf atlas driver
2021-01-20 13:15 ` [PATCH 3/4] timer: remove sirf atlas driver Arnd Bergmann
@ 2021-01-20 21:21 ` Barry Song
0 siblings, 0 replies; 12+ messages in thread
From: Barry Song @ 2021-01-20 21:21 UTC (permalink / raw)
To: Arnd Bergmann
Cc: Thomas Gleixner, Daniel Lezcano, Arnd Bergmann, LKML,
linux-arm-kernel
Arnd Bergmann <arnd@kernel.org> 于2021年1月21日周四 上午2:16写道：
>
> From: Arnd Bergmann <arnd@arndb.de>
>
> The CSR SiRF prima2/atlas platforms are getting removed, so this driver
> is no longer needed.
>
> Cc: Barry Song <baohua@kernel.org>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Barry Song <baohua@kernel.org>
> ---
> drivers/clocksource/Kconfig | 6 -
> drivers/clocksource/Makefile | 1 -
> drivers/clocksource/timer-atlas7.c | 281 -----------------------------
> 3 files changed, 288 deletions(-)
> delete mode 100644 drivers/clocksource/timer-atlas7.c
>
> diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
> index 1feadd067677..ac6de462591a 100644
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig
> @@ -197,12 +197,6 @@ config CLPS711X_TIMER
> help
> Enables support for the Cirrus Logic PS711 timer.
>
> -config ATLAS7_TIMER
> - bool "Atlas7 timer driver" if COMPILE_TEST
> - select CLKSRC_MMIO
> - help
> - Enables support for the Atlas7 timer.
> -
> config MXS_TIMER
> bool "MXS timer driver" if COMPILE_TEST
> select CLKSRC_MMIO
> diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
> index 1089f2ed8560..49496637700f 100644
> --- a/drivers/clocksource/Makefile
> +++ b/drivers/clocksource/Makefile
> @@ -30,7 +30,6 @@ obj-$(CONFIG_ARMADA_370_XP_TIMER) += timer-armada-370-xp.o
> obj-$(CONFIG_ORION_TIMER) += timer-orion.o
> obj-$(CONFIG_BCM2835_TIMER) += bcm2835_timer.o
> obj-$(CONFIG_CLPS711X_TIMER) += clps711x-timer.o
> -obj-$(CONFIG_ATLAS7_TIMER) += timer-atlas7.o
> obj-$(CONFIG_MXS_TIMER) += mxs_timer.o
> obj-$(CONFIG_CLKSRC_PXA) += timer-pxa.o
> obj-$(CONFIG_PRIMA2_TIMER) += timer-prima2.o
> diff --git a/drivers/clocksource/timer-atlas7.c b/drivers/clocksource/timer-atlas7.c
> deleted file mode 100644
> index c21c91c2bc56..000000000000
> --- a/drivers/clocksource/timer-atlas7.c
> +++ /dev/null
> @@ -1,281 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0-or-later
> -/*
> - * System timer for CSR SiRFprimaII
> - *
> - * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
> - */
> -
> -#include <linux/kernel.h>
> -#include <linux/interrupt.h>
> -#include <linux/clockchips.h>
> -#include <linux/clocksource.h>
> -#include <linux/cpu.h>
> -#include <linux/bitops.h>
> -#include <linux/irq.h>
> -#include <linux/clk.h>
> -#include <linux/slab.h>
> -#include <linux/of.h>
> -#include <linux/of_irq.h>
> -#include <linux/of_address.h>
> -#include <linux/sched_clock.h>
> -
> -#define SIRFSOC_TIMER_32COUNTER_0_CTRL 0x0000
> -#define SIRFSOC_TIMER_32COUNTER_1_CTRL 0x0004
> -#define SIRFSOC_TIMER_MATCH_0 0x0018
> -#define SIRFSOC_TIMER_MATCH_1 0x001c
> -#define SIRFSOC_TIMER_COUNTER_0 0x0048
> -#define SIRFSOC_TIMER_COUNTER_1 0x004c
> -#define SIRFSOC_TIMER_INTR_STATUS 0x0060
> -#define SIRFSOC_TIMER_WATCHDOG_EN 0x0064
> -#define SIRFSOC_TIMER_64COUNTER_CTRL 0x0068
> -#define SIRFSOC_TIMER_64COUNTER_LO 0x006c
> -#define SIRFSOC_TIMER_64COUNTER_HI 0x0070
> -#define SIRFSOC_TIMER_64COUNTER_LOAD_LO 0x0074
> -#define SIRFSOC_TIMER_64COUNTER_LOAD_HI 0x0078
> -#define SIRFSOC_TIMER_64COUNTER_RLATCHED_LO 0x007c
> -#define SIRFSOC_TIMER_64COUNTER_RLATCHED_HI 0x0080
> -
> -#define SIRFSOC_TIMER_REG_CNT 6
> -
> -static unsigned long atlas7_timer_rate;
> -
> -static const u32 sirfsoc_timer_reg_list[SIRFSOC_TIMER_REG_CNT] = {
> - SIRFSOC_TIMER_WATCHDOG_EN,
> - SIRFSOC_TIMER_32COUNTER_0_CTRL,
> - SIRFSOC_TIMER_32COUNTER_1_CTRL,
> - SIRFSOC_TIMER_64COUNTER_CTRL,
> - SIRFSOC_TIMER_64COUNTER_RLATCHED_LO,
> - SIRFSOC_TIMER_64COUNTER_RLATCHED_HI,
> -};
> -
> -static u32 sirfsoc_timer_reg_val[SIRFSOC_TIMER_REG_CNT];
> -
> -static void __iomem *sirfsoc_timer_base;
> -
> -/* disable count and interrupt */
> -static inline void sirfsoc_timer_count_disable(int idx)
> -{
> - writel_relaxed(readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_32COUNTER_0_CTRL + 4 * idx) & ~0x7,
> - sirfsoc_timer_base + SIRFSOC_TIMER_32COUNTER_0_CTRL + 4 * idx);
> -}
> -
> -/* enable count and interrupt */
> -static inline void sirfsoc_timer_count_enable(int idx)
> -{
> - writel_relaxed(readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_32COUNTER_0_CTRL + 4 * idx) | 0x3,
> - sirfsoc_timer_base + SIRFSOC_TIMER_32COUNTER_0_CTRL + 4 * idx);
> -}
> -
> -/* timer interrupt handler */
> -static irqreturn_t sirfsoc_timer_interrupt(int irq, void *dev_id)
> -{
> - struct clock_event_device *ce = dev_id;
> - int cpu = smp_processor_id();
> -
> - /* clear timer interrupt */
> - writel_relaxed(BIT(cpu), sirfsoc_timer_base + SIRFSOC_TIMER_INTR_STATUS);
> -
> - if (clockevent_state_oneshot(ce))
> - sirfsoc_timer_count_disable(cpu);
> -
> - ce->event_handler(ce);
> -
> - return IRQ_HANDLED;
> -}
> -
> -/* read 64-bit timer counter */
> -static u64 sirfsoc_timer_read(struct clocksource *cs)
> -{
> - u64 cycles;
> -
> - writel_relaxed((readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_CTRL) |
> - BIT(0)) & ~BIT(1), sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_CTRL);
> -
> - cycles = readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_RLATCHED_HI);
> - cycles = (cycles << 32) | readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_RLATCHED_LO);
> -
> - return cycles;
> -}
> -
> -static int sirfsoc_timer_set_next_event(unsigned long delta,
> - struct clock_event_device *ce)
> -{
> - int cpu = smp_processor_id();
> -
> - /* disable timer first, then modify the related registers */
> - sirfsoc_timer_count_disable(cpu);
> -
> - writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_COUNTER_0 +
> - 4 * cpu);
> - writel_relaxed(delta, sirfsoc_timer_base + SIRFSOC_TIMER_MATCH_0 +
> - 4 * cpu);
> -
> - /* enable the tick */
> - sirfsoc_timer_count_enable(cpu);
> -
> - return 0;
> -}
> -
> -/* Oneshot is enabled in set_next_event */
> -static int sirfsoc_timer_shutdown(struct clock_event_device *evt)
> -{
> - sirfsoc_timer_count_disable(smp_processor_id());
> - return 0;
> -}
> -
> -static void sirfsoc_clocksource_suspend(struct clocksource *cs)
> -{
> - int i;
> -
> - for (i = 0; i < SIRFSOC_TIMER_REG_CNT; i++)
> - sirfsoc_timer_reg_val[i] = readl_relaxed(sirfsoc_timer_base + sirfsoc_timer_reg_list[i]);
> -}
> -
> -static void sirfsoc_clocksource_resume(struct clocksource *cs)
> -{
> - int i;
> -
> - for (i = 0; i < SIRFSOC_TIMER_REG_CNT - 2; i++)
> - writel_relaxed(sirfsoc_timer_reg_val[i], sirfsoc_timer_base + sirfsoc_timer_reg_list[i]);
> -
> - writel_relaxed(sirfsoc_timer_reg_val[SIRFSOC_TIMER_REG_CNT - 2],
> - sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_LOAD_LO);
> - writel_relaxed(sirfsoc_timer_reg_val[SIRFSOC_TIMER_REG_CNT - 1],
> - sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_LOAD_HI);
> -
> - writel_relaxed(readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_CTRL) |
> - BIT(1) | BIT(0), sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_CTRL);
> -}
> -
> -static struct clock_event_device __percpu *sirfsoc_clockevent;
> -
> -static struct clocksource sirfsoc_clocksource = {
> - .name = "sirfsoc_clocksource",
> - .rating = 200,
> - .mask = CLOCKSOURCE_MASK(64),
> - .flags = CLOCK_SOURCE_IS_CONTINUOUS,
> - .read = sirfsoc_timer_read,
> - .suspend = sirfsoc_clocksource_suspend,
> - .resume = sirfsoc_clocksource_resume,
> -};
> -
> -static unsigned int sirfsoc_timer_irq, sirfsoc_timer1_irq;
> -
> -static int sirfsoc_local_timer_starting_cpu(unsigned int cpu)
> -{
> - struct clock_event_device *ce = per_cpu_ptr(sirfsoc_clockevent, cpu);
> - unsigned int irq;
> - const char *name;
> -
> - if (cpu == 0) {
> - irq = sirfsoc_timer_irq;
> - name = "sirfsoc_timer0";
> - } else {
> - irq = sirfsoc_timer1_irq;
> - name = "sirfsoc_timer1";
> - }
> -
> - ce->irq = irq;
> - ce->name = "local_timer";
> - ce->features = CLOCK_EVT_FEAT_ONESHOT;
> - ce->rating = 200;
> - ce->set_state_shutdown = sirfsoc_timer_shutdown;
> - ce->set_state_oneshot = sirfsoc_timer_shutdown;
> - ce->tick_resume = sirfsoc_timer_shutdown;
> - ce->set_next_event = sirfsoc_timer_set_next_event;
> - clockevents_calc_mult_shift(ce, atlas7_timer_rate, 60);
> - ce->max_delta_ns = clockevent_delta2ns(-2, ce);
> - ce->max_delta_ticks = (unsigned long)-2;
> - ce->min_delta_ns = clockevent_delta2ns(2, ce);
> - ce->min_delta_ticks = 2;
> - ce->cpumask = cpumask_of(cpu);
> -
> - BUG_ON(request_irq(ce->irq, sirfsoc_timer_interrupt,
> - IRQF_TIMER | IRQF_NOBALANCING, name, ce));
> - irq_force_affinity(ce->irq, cpumask_of(cpu));
> -
> - clockevents_register_device(ce);
> - return 0;
> -}
> -
> -static int sirfsoc_local_timer_dying_cpu(unsigned int cpu)
> -{
> - struct clock_event_device *ce = per_cpu_ptr(sirfsoc_clockevent, cpu);
> -
> - sirfsoc_timer_count_disable(1);
> -
> - if (cpu == 0)
> - free_irq(sirfsoc_timer_irq, ce);
> - else
> - free_irq(sirfsoc_timer1_irq, ce);
> - return 0;
> -}
> -
> -static int __init sirfsoc_clockevent_init(void)
> -{
> - sirfsoc_clockevent = alloc_percpu(struct clock_event_device);
> - BUG_ON(!sirfsoc_clockevent);
> -
> - /* Install and invoke hotplug callbacks */
> - return cpuhp_setup_state(CPUHP_AP_MARCO_TIMER_STARTING,
> - "clockevents/marco:starting",
> - sirfsoc_local_timer_starting_cpu,
> - sirfsoc_local_timer_dying_cpu);
> -}
> -
> -/* initialize the kernel jiffy timer source */
> -static int __init sirfsoc_atlas7_timer_init(struct device_node *np)
> -{
> - struct clk *clk;
> -
> - clk = of_clk_get(np, 0);
> - BUG_ON(IS_ERR(clk));
> -
> - BUG_ON(clk_prepare_enable(clk));
> -
> - atlas7_timer_rate = clk_get_rate(clk);
> -
> - /* timer dividers: 0, not divided */
> - writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_CTRL);
> - writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_32COUNTER_0_CTRL);
> - writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_32COUNTER_1_CTRL);
> -
> - /* Initialize timer counters to 0 */
> - writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_LOAD_LO);
> - writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_LOAD_HI);
> - writel_relaxed(readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_CTRL) |
> - BIT(1) | BIT(0), sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_CTRL);
> - writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_COUNTER_0);
> - writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_COUNTER_1);
> -
> - /* Clear all interrupts */
> - writel_relaxed(0xFFFF, sirfsoc_timer_base + SIRFSOC_TIMER_INTR_STATUS);
> -
> - BUG_ON(clocksource_register_hz(&sirfsoc_clocksource, atlas7_timer_rate));
> -
> - return sirfsoc_clockevent_init();
> -}
> -
> -static int __init sirfsoc_of_timer_init(struct device_node *np)
> -{
> - sirfsoc_timer_base = of_iomap(np, 0);
> - if (!sirfsoc_timer_base) {
> - pr_err("unable to map timer cpu registers\n");
> - return -ENXIO;
> - }
> -
> - sirfsoc_timer_irq = irq_of_parse_and_map(np, 0);
> - if (!sirfsoc_timer_irq) {
> - pr_err("No irq passed for timer0 via DT\n");
> - return -EINVAL;
> - }
> -
> - sirfsoc_timer1_irq = irq_of_parse_and_map(np, 1);
> - if (!sirfsoc_timer1_irq) {
> - pr_err("No irq passed for timer1 via DT\n");
> - return -EINVAL;
> - }
> -
> - return sirfsoc_atlas7_timer_init(np);
> -}
> -TIMER_OF_DECLARE(sirfsoc_atlas7_timer, "sirf,atlas7-tick", sirfsoc_of_timer_init);
> --
> 2.29.2
>
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^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH 4/4] timer: remove sirf prima driver
2021-01-20 13:15 [PATCH 0/4] clocksource: remove obsolete drivers Arnd Bergmann
` (2 preceding siblings ...)
2021-01-20 13:15 ` [PATCH 3/4] timer: remove sirf atlas driver Arnd Bergmann
@ 2021-01-20 13:15 ` Arnd Bergmann
2021-01-20 17:50 ` Joe Perches
2021-01-20 21:11 ` Barry Song
2021-02-03 8:37 ` [PATCH 0/4] clocksource: remove obsolete drivers Daniel Lezcano
4 siblings, 2 replies; 12+ messages in thread
From: Arnd Bergmann @ 2021-01-20 13:15 UTC (permalink / raw)
To: linux-arm-kernel, linux-kernel, Daniel Lezcano, Thomas Gleixner
Cc: Barry Song, Arnd Bergmann
From: Arnd Bergmann <arnd@arndb.de>
The CSR SiRF prima2/atlas platforms are getting removed, so this driver
is no longer needed.
Cc: Barry Song <baohua@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/clocksource/Kconfig | 6 -
drivers/clocksource/Makefile | 1 -
drivers/clocksource/timer-prima2.c | 242 -----------------------------
3 files changed, 249 deletions(-)
delete mode 100644 drivers/clocksource/timer-prima2.c
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index ac6de462591a..a2d932825975 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -204,12 +204,6 @@ config MXS_TIMER
help
Enables support for the MXS timer.
-config PRIMA2_TIMER
- bool "Prima2 timer driver" if COMPILE_TEST
- select CLKSRC_MMIO
- help
- Enables support for the Prima2 timer.
-
config NSPIRE_TIMER
bool "NSpire timer driver" if COMPILE_TEST
select CLKSRC_MMIO
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 49496637700f..d6ffe3d77d7e 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -32,7 +32,6 @@ obj-$(CONFIG_BCM2835_TIMER) += bcm2835_timer.o
obj-$(CONFIG_CLPS711X_TIMER) += clps711x-timer.o
obj-$(CONFIG_MXS_TIMER) += mxs_timer.o
obj-$(CONFIG_CLKSRC_PXA) += timer-pxa.o
-obj-$(CONFIG_PRIMA2_TIMER) += timer-prima2.o
obj-$(CONFIG_SUN4I_TIMER) += timer-sun4i.o
obj-$(CONFIG_SUN5I_HSTIMER) += timer-sun5i.o
obj-$(CONFIG_MESON6_TIMER) += timer-meson6.o
diff --git a/drivers/clocksource/timer-prima2.c b/drivers/clocksource/timer-prima2.c
deleted file mode 100644
index c5d469342a9d..000000000000
--- a/drivers/clocksource/timer-prima2.c
+++ /dev/null
@@ -1,242 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * System timer for CSR SiRFprimaII
- *
- * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
- */
-
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/clockchips.h>
-#include <linux/clocksource.h>
-#include <linux/bitops.h>
-#include <linux/irq.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/slab.h>
-#include <linux/of.h>
-#include <linux/of_irq.h>
-#include <linux/of_address.h>
-#include <linux/sched_clock.h>
-
-#define PRIMA2_CLOCK_FREQ 1000000
-
-#define SIRFSOC_TIMER_COUNTER_LO 0x0000
-#define SIRFSOC_TIMER_COUNTER_HI 0x0004
-#define SIRFSOC_TIMER_MATCH_0 0x0008
-#define SIRFSOC_TIMER_MATCH_1 0x000C
-#define SIRFSOC_TIMER_MATCH_2 0x0010
-#define SIRFSOC_TIMER_MATCH_3 0x0014
-#define SIRFSOC_TIMER_MATCH_4 0x0018
-#define SIRFSOC_TIMER_MATCH_5 0x001C
-#define SIRFSOC_TIMER_STATUS 0x0020
-#define SIRFSOC_TIMER_INT_EN 0x0024
-#define SIRFSOC_TIMER_WATCHDOG_EN 0x0028
-#define SIRFSOC_TIMER_DIV 0x002C
-#define SIRFSOC_TIMER_LATCH 0x0030
-#define SIRFSOC_TIMER_LATCHED_LO 0x0034
-#define SIRFSOC_TIMER_LATCHED_HI 0x0038
-
-#define SIRFSOC_TIMER_WDT_INDEX 5
-
-#define SIRFSOC_TIMER_LATCH_BIT BIT(0)
-
-#define SIRFSOC_TIMER_REG_CNT 11
-
-static const u32 sirfsoc_timer_reg_list[SIRFSOC_TIMER_REG_CNT] = {
- SIRFSOC_TIMER_MATCH_0, SIRFSOC_TIMER_MATCH_1, SIRFSOC_TIMER_MATCH_2,
- SIRFSOC_TIMER_MATCH_3, SIRFSOC_TIMER_MATCH_4, SIRFSOC_TIMER_MATCH_5,
- SIRFSOC_TIMER_INT_EN, SIRFSOC_TIMER_WATCHDOG_EN, SIRFSOC_TIMER_DIV,
- SIRFSOC_TIMER_LATCHED_LO, SIRFSOC_TIMER_LATCHED_HI,
-};
-
-static u32 sirfsoc_timer_reg_val[SIRFSOC_TIMER_REG_CNT];
-
-static void __iomem *sirfsoc_timer_base;
-
-/* timer0 interrupt handler */
-static irqreturn_t sirfsoc_timer_interrupt(int irq, void *dev_id)
-{
- struct clock_event_device *ce = dev_id;
-
- WARN_ON(!(readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_STATUS) &
- BIT(0)));
-
- /* clear timer0 interrupt */
- writel_relaxed(BIT(0), sirfsoc_timer_base + SIRFSOC_TIMER_STATUS);
-
- ce->event_handler(ce);
-
- return IRQ_HANDLED;
-}
-
-/* read 64-bit timer counter */
-static u64 notrace sirfsoc_timer_read(struct clocksource *cs)
-{
- u64 cycles;
-
- /* latch the 64-bit timer counter */
- writel_relaxed(SIRFSOC_TIMER_LATCH_BIT,
- sirfsoc_timer_base + SIRFSOC_TIMER_LATCH);
- cycles = readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_LATCHED_HI);
- cycles = (cycles << 32) |
- readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_LATCHED_LO);
-
- return cycles;
-}
-
-static int sirfsoc_timer_set_next_event(unsigned long delta,
- struct clock_event_device *ce)
-{
- unsigned long now, next;
-
- writel_relaxed(SIRFSOC_TIMER_LATCH_BIT,
- sirfsoc_timer_base + SIRFSOC_TIMER_LATCH);
- now = readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_LATCHED_LO);
- next = now + delta;
- writel_relaxed(next, sirfsoc_timer_base + SIRFSOC_TIMER_MATCH_0);
- writel_relaxed(SIRFSOC_TIMER_LATCH_BIT,
- sirfsoc_timer_base + SIRFSOC_TIMER_LATCH);
- now = readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_LATCHED_LO);
-
- return next - now > delta ? -ETIME : 0;
-}
-
-static int sirfsoc_timer_shutdown(struct clock_event_device *evt)
-{
- u32 val = readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_INT_EN);
-
- writel_relaxed(val & ~BIT(0),
- sirfsoc_timer_base + SIRFSOC_TIMER_INT_EN);
- return 0;
-}
-
-static int sirfsoc_timer_set_oneshot(struct clock_event_device *evt)
-{
- u32 val = readl_relaxed(sirfsoc_timer_base + SIRFSOC_TIMER_INT_EN);
-
- writel_relaxed(val | BIT(0), sirfsoc_timer_base + SIRFSOC_TIMER_INT_EN);
- return 0;
-}
-
-static void sirfsoc_clocksource_suspend(struct clocksource *cs)
-{
- int i;
-
- writel_relaxed(SIRFSOC_TIMER_LATCH_BIT,
- sirfsoc_timer_base + SIRFSOC_TIMER_LATCH);
-
- for (i = 0; i < SIRFSOC_TIMER_REG_CNT; i++)
- sirfsoc_timer_reg_val[i] =
- readl_relaxed(sirfsoc_timer_base +
- sirfsoc_timer_reg_list[i]);
-}
-
-static void sirfsoc_clocksource_resume(struct clocksource *cs)
-{
- int i;
-
- for (i = 0; i < SIRFSOC_TIMER_REG_CNT - 2; i++)
- writel_relaxed(sirfsoc_timer_reg_val[i],
- sirfsoc_timer_base + sirfsoc_timer_reg_list[i]);
-
- writel_relaxed(sirfsoc_timer_reg_val[SIRFSOC_TIMER_REG_CNT - 2],
- sirfsoc_timer_base + SIRFSOC_TIMER_COUNTER_LO);
- writel_relaxed(sirfsoc_timer_reg_val[SIRFSOC_TIMER_REG_CNT - 1],
- sirfsoc_timer_base + SIRFSOC_TIMER_COUNTER_HI);
-}
-
-static struct clock_event_device sirfsoc_clockevent = {
- .name = "sirfsoc_clockevent",
- .rating = 200,
- .features = CLOCK_EVT_FEAT_ONESHOT,
- .set_state_shutdown = sirfsoc_timer_shutdown,
- .set_state_oneshot = sirfsoc_timer_set_oneshot,
- .set_next_event = sirfsoc_timer_set_next_event,
-};
-
-static struct clocksource sirfsoc_clocksource = {
- .name = "sirfsoc_clocksource",
- .rating = 200,
- .mask = CLOCKSOURCE_MASK(64),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
- .read = sirfsoc_timer_read,
- .suspend = sirfsoc_clocksource_suspend,
- .resume = sirfsoc_clocksource_resume,
-};
-
-/* Overwrite weak default sched_clock with more precise one */
-static u64 notrace sirfsoc_read_sched_clock(void)
-{
- return sirfsoc_timer_read(NULL);
-}
-
-static void __init sirfsoc_clockevent_init(void)
-{
- sirfsoc_clockevent.cpumask = cpumask_of(0);
- clockevents_config_and_register(&sirfsoc_clockevent, PRIMA2_CLOCK_FREQ,
- 2, -2);
-}
-
-/* initialize the kernel jiffy timer source */
-static int __init sirfsoc_prima2_timer_init(struct device_node *np)
-{
- unsigned long rate;
- unsigned int irq;
- struct clk *clk;
- int ret;
-
- clk = of_clk_get(np, 0);
- if (IS_ERR(clk)) {
- pr_err("Failed to get clock\n");
- return PTR_ERR(clk);
- }
-
- ret = clk_prepare_enable(clk);
- if (ret) {
- pr_err("Failed to enable clock\n");
- return ret;
- }
-
- rate = clk_get_rate(clk);
-
- if (rate < PRIMA2_CLOCK_FREQ || rate % PRIMA2_CLOCK_FREQ) {
- pr_err("Invalid clock rate\n");
- return -EINVAL;
- }
-
- sirfsoc_timer_base = of_iomap(np, 0);
- if (!sirfsoc_timer_base) {
- pr_err("unable to map timer cpu registers\n");
- return -ENXIO;
- }
-
- irq = irq_of_parse_and_map(np, 0);
-
- writel_relaxed(rate / PRIMA2_CLOCK_FREQ / 2 - 1,
- sirfsoc_timer_base + SIRFSOC_TIMER_DIV);
- writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_COUNTER_LO);
- writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_COUNTER_HI);
- writel_relaxed(BIT(0), sirfsoc_timer_base + SIRFSOC_TIMER_STATUS);
-
- ret = clocksource_register_hz(&sirfsoc_clocksource, PRIMA2_CLOCK_FREQ);
- if (ret) {
- pr_err("Failed to register clocksource\n");
- return ret;
- }
-
- sched_clock_register(sirfsoc_read_sched_clock, 64, PRIMA2_CLOCK_FREQ);
-
- ret = request_irq(irq, sirfsoc_timer_interrupt, IRQF_TIMER,
- "sirfsoc_timer0", &sirfsoc_clockevent);
- if (ret) {
- pr_err("Failed to setup irq\n");
- return ret;
- }
-
- sirfsoc_clockevent_init();
-
- return 0;
-}
-TIMER_OF_DECLARE(sirfsoc_prima2_timer,
- "sirf,prima2-tick", sirfsoc_prima2_timer_init);
--
2.29.2
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^ permalink raw reply related [flat|nested] 12+ messages in thread* Re: [PATCH 4/4] timer: remove sirf prima driver
2021-01-20 13:15 ` [PATCH 4/4] timer: remove sirf prima driver Arnd Bergmann
@ 2021-01-20 17:50 ` Joe Perches
2021-01-20 20:53 ` Arnd Bergmann
2021-01-20 21:11 ` Barry Song
1 sibling, 1 reply; 12+ messages in thread
From: Joe Perches @ 2021-01-20 17:50 UTC (permalink / raw)
To: Arnd Bergmann, linux-arm-kernel, linux-kernel, Daniel Lezcano,
Thomas Gleixner
Cc: Barry Song, Arnd Bergmann
On Wed, 2021-01-20 at 14:15 +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
>
> The CSR SiRF prima2/atlas platforms are getting removed, so this driver
> is no longer needed.
Should this platform really be removed?
While I followed the removal thread just a little,
isn't prima still in use in various GPS handhelds?
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^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 4/4] timer: remove sirf prima driver
2021-01-20 17:50 ` Joe Perches
@ 2021-01-20 20:53 ` Arnd Bergmann
0 siblings, 0 replies; 12+ messages in thread
From: Arnd Bergmann @ 2021-01-20 20:53 UTC (permalink / raw)
To: Joe Perches
Cc: Barry Song, Arnd Bergmann, Daniel Lezcano,
linux-kernel@vger.kernel.org, Thomas Gleixner, Linux ARM
On Wed, Jan 20, 2021 at 6:50 PM Joe Perches <joe@perches.com> wrote:
>
> On Wed, 2021-01-20 at 14:15 +0100, Arnd Bergmann wrote:
> > From: Arnd Bergmann <arnd@arndb.de>
> >
> > The CSR SiRF prima2/atlas platforms are getting removed, so this driver
> > is no longer needed.
>
> Should this platform really be removed?
>
> While I followed the removal thread just a little,
> isn't prima still in use in various GPS handhelds?
I'm not aware of anyone running mainline Linux on those, as I said
in the platform removal patch[1] description, there have not been any
contributions to third-party machine support, the only boards that
ever booted a mainline kernel were the evaluation boards.
If you have any information on hobbyist users of this platform, let
me know.
Arnd
[1] https://lore.kernel.org/linux-arm-kernel/20210120124812.2800027-3-arnd@kernel.org/T/#u
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^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 4/4] timer: remove sirf prima driver
2021-01-20 13:15 ` [PATCH 4/4] timer: remove sirf prima driver Arnd Bergmann
2021-01-20 17:50 ` Joe Perches
@ 2021-01-20 21:11 ` Barry Song
1 sibling, 0 replies; 12+ messages in thread
From: Barry Song @ 2021-01-20 21:11 UTC (permalink / raw)
To: Arnd Bergmann
Cc: Thomas Gleixner, Daniel Lezcano, Arnd Bergmann, LKML,
linux-arm-kernel
Arnd Bergmann <arnd@kernel.org> 于2021年1月21日周四 上午2:16写道：
>
> From: Arnd Bergmann <arnd@arndb.de>
>
> The CSR SiRF prima2/atlas platforms are getting removed, so this driver
> is no longer needed.
>
> Cc: Barry Song <baohua@kernel.org>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Barry Song <baohua@kernel.org>
> ---
> drivers/clocksource/Kconfig | 6 -
> drivers/clocksource/Makefile | 1 -
> drivers/clocksource/timer-prima2.c | 242 -----------------------------
> 3 files changed, 249 deletions(-)
> delete mode 100644 drivers/clocksource/timer-prima2.c
>
Thanks
Barry
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^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 0/4] clocksource: remove obsolete drivers
2021-01-20 13:15 [PATCH 0/4] clocksource: remove obsolete drivers Arnd Bergmann
` (3 preceding siblings ...)
2021-01-20 13:15 ` [PATCH 4/4] timer: remove sirf prima driver Arnd Bergmann
@ 2021-02-03 8:37 ` Daniel Lezcano
4 siblings, 0 replies; 12+ messages in thread
From: Daniel Lezcano @ 2021-02-03 8:37 UTC (permalink / raw)
To: Arnd Bergmann, linux-arm-kernel, linux-kernel, Thomas Gleixner
Cc: Arnd Bergmann
Applied, thanks
On 20/01/2021 14:15, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
>
> A few Arm platforms are getting removed in v5.12, this removes
> the corresponding clocksource drivers.
>
> Link: https://lore.kernel.org/linux-arm-kernel/20210120124812.2800027-1-arnd@kernel.org/T/
>
>
> Arnd Bergmann (4):
> timer: remove u300 driver
> timer: remove tango driver
> timer: remove sirf atlas driver
> timer: remove sirf prima driver
>
> .../timer/stericsson-u300-apptimer.txt | 18 -
> drivers/clocksource/Kconfig | 27 --
> drivers/clocksource/Makefile | 4 -
> drivers/clocksource/timer-atlas7.c | 281 -----------
> drivers/clocksource/timer-prima2.c | 242 ----------
> drivers/clocksource/timer-tango-xtal.c | 57 ---
> drivers/clocksource/timer-u300.c | 457 ------------------
> 7 files changed, 1086 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/timer/stericsson-u300-apptimer.txt
> delete mode 100644 drivers/clocksource/timer-atlas7.c
> delete mode 100644 drivers/clocksource/timer-prima2.c
> delete mode 100644 drivers/clocksource/timer-tango-xtal.c
> delete mode 100644 drivers/clocksource/timer-u300.c
>
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^ permalink raw reply [flat|nested] 12+ messages in thread