[PATCH 1/3] ARM: clps711x: Switch CLPS711X subarch to use clk and clocksource driver
Alexander Shiyan
shc_work at mail.ru
Tue Aug 19 05:31:13 PDT 2014
This patch removes old support for clk and clocksource support and
switches platform to use new drivers.
Signed-off-by: Alexander Shiyan <shc_work at mail.ru>
---
arch/arm/mach-clps711x/common.c | 138 ++--------------------------------------
arch/arm/mach-clps711x/common.h | 5 ++
2 files changed, 9 insertions(+), 134 deletions(-)
diff --git a/arch/arm/mach-clps711x/common.c b/arch/arm/mach-clps711x/common.c
index 2a6323b..671acc5a 100644
--- a/arch/arm/mach-clps711x/common.c
+++ b/arch/arm/mach-clps711x/common.c
@@ -19,29 +19,17 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#include <linux/io.h>
+
#include <linux/init.h>
#include <linux/sizes.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/clk.h>
-#include <linux/clkdev.h>
-#include <linux/clockchips.h>
-#include <linux/clocksource.h>
-#include <linux/clk-provider.h>
-#include <linux/sched_clock.h>
#include <asm/mach/map.h>
-#include <asm/mach/time.h>
#include <asm/system_misc.h>
#include <mach/hardware.h>
#include "common.h"
-static struct clk *clk_pll, *clk_bus, *clk_uart, *clk_timerl, *clk_timerh,
- *clk_tint, *clk_spi;
-
/*
* This maps the generic CLPS711x registers
*/
@@ -64,129 +52,11 @@ void __init clps711x_init_irq(void)
clps711x_intc_init(CLPS711X_PHYS_BASE, SZ_16K);
}
-static u64 notrace clps711x_sched_clock_read(void)
-{
- return ~readw_relaxed(CLPS711X_VIRT_BASE + TC1D);
-}
-
-static void clps711x_clockevent_set_mode(enum clock_event_mode mode,
- struct clock_event_device *evt)
-{
- disable_irq(IRQ_TC2OI);
-
- switch (mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- enable_irq(IRQ_TC2OI);
- break;
- case CLOCK_EVT_MODE_ONESHOT:
- /* Not supported */
- case CLOCK_EVT_MODE_SHUTDOWN:
- case CLOCK_EVT_MODE_UNUSED:
- case CLOCK_EVT_MODE_RESUME:
- /* Left event sources disabled, no more interrupts appear */
- break;
- }
-}
-
-static struct clock_event_device clockevent_clps711x = {
- .name = "clps711x-clockevent",
- .rating = 300,
- .features = CLOCK_EVT_FEAT_PERIODIC,
- .set_mode = clps711x_clockevent_set_mode,
-};
-
-static irqreturn_t clps711x_timer_interrupt(int irq, void *dev_id)
-{
- clockevent_clps711x.event_handler(&clockevent_clps711x);
-
- return IRQ_HANDLED;
-}
-
-static struct irqaction clps711x_timer_irq = {
- .name = "clps711x-timer",
- .flags = IRQF_TIMER | IRQF_IRQPOLL,
- .handler = clps711x_timer_interrupt,
-};
-
-static void add_fixed_clk(struct clk *clk, const char *name, int rate)
-{
- clk = clk_register_fixed_rate(NULL, name, NULL, CLK_IS_ROOT, rate);
- clk_register_clkdev(clk, name, NULL);
-}
-
void __init clps711x_timer_init(void)
{
- int osc, ext, pll, cpu, bus, timl, timh, uart, spi;
- u32 tmp;
-
- osc = 3686400;
- ext = 13000000;
-
- tmp = clps_readl(PLLR) >> 24;
- if (tmp)
- pll = (osc * tmp) / 2;
- else
- pll = 73728000; /* Default value */
-
- tmp = clps_readl(SYSFLG2);
- if (tmp & SYSFLG2_CKMODE) {
- cpu = ext;
- bus = cpu;
- spi = 135400;
- pll = 0;
- } else {
- cpu = pll;
- if (cpu >= 36864000)
- bus = cpu / 2;
- else
- bus = 36864000 / 2;
- spi = cpu / 576;
- }
-
- uart = bus / 10;
-
- if (tmp & SYSFLG2_CKMODE) {
- tmp = clps_readl(SYSCON2);
- if (tmp & SYSCON2_OSTB)
- timh = ext / 26;
- else
- timh = 541440;
- } else
- timh = DIV_ROUND_CLOSEST(cpu, 144);
-
- timl = DIV_ROUND_CLOSEST(timh, 256);
-
- /* All clocks are fixed */
- add_fixed_clk(clk_pll, "pll", pll);
- add_fixed_clk(clk_bus, "bus", bus);
- add_fixed_clk(clk_uart, "uart", uart);
- add_fixed_clk(clk_timerl, "timer_lf", timl);
- add_fixed_clk(clk_timerh, "timer_hf", timh);
- add_fixed_clk(clk_tint, "tint", 64);
- add_fixed_clk(clk_spi, "spi", spi);
-
- pr_info("CPU frequency set at %i Hz.\n", cpu);
-
- /* Start Timer1 in free running mode (Low frequency) */
- tmp = clps_readl(SYSCON1) & ~(SYSCON1_TC1S | SYSCON1_TC1M);
- clps_writel(tmp, SYSCON1);
-
- sched_clock_register(clps711x_sched_clock_read, 16, timl);
-
- clocksource_mmio_init(CLPS711X_VIRT_BASE + TC1D,
- "clps711x_clocksource", timl, 300, 16,
- clocksource_mmio_readw_down);
-
- /* Set Timer2 prescaler */
- clps_writew(DIV_ROUND_CLOSEST(timh, HZ), TC2D);
-
- /* Start Timer2 in prescale mode (High frequency)*/
- tmp = clps_readl(SYSCON1) | SYSCON1_TC2M | SYSCON1_TC2S;
- clps_writel(tmp, SYSCON1);
-
- clockevents_config_and_register(&clockevent_clps711x, timh, 0, 0);
-
- setup_irq(IRQ_TC2OI, &clps711x_timer_irq);
+ clps711x_clk_init(CLPS711X_VIRT_BASE);
+ clps711x_clksrc_init(CLPS711X_VIRT_BASE + TC1D,
+ CLPS711X_VIRT_BASE + TC2D, IRQ_TC2OI);
}
void clps711x_restart(enum reboot_mode mode, const char *cmd)
diff --git a/arch/arm/mach-clps711x/common.h b/arch/arm/mach-clps711x/common.h
index f881899..370200b 100644
--- a/arch/arm/mach-clps711x/common.h
+++ b/arch/arm/mach-clps711x/common.h
@@ -16,3 +16,8 @@ extern void clps711x_restart(enum reboot_mode mode, const char *cmd);
/* drivers/irqchip/irq-clps711x.c */
void clps711x_intc_init(phys_addr_t, resource_size_t);
+/* drivers/clk/clk-clps711x.c */
+void clps711x_clk_init(void __iomem *base);
+/* drivers/clocksource/clps711x-timer.c */
+void clps711x_clksrc_init(void __iomem *tc1_base, void __iomem *tc2_base,
+ unsigned int irq);
--
1.8.5.5
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