[PATCH v4 04/11] ARM: davinci: da850: switch to using the clocksource driver

Bartosz Golaszewski brgl at bgdev.pl
Mon Mar 18 05:10:53 PDT 2019


From: Bartosz Golaszewski <bgolaszewski at baylibre.com>

We now have a proper clocksource driver for davinci. Switch the da850
platform to using it.

Signed-off-by: Bartosz Golaszewski <bgolaszewski at baylibre.com>
Reviewed-by: David Lechner <david at lechnology.com>
---
 arch/arm/mach-davinci/da850.c | 46 ++++++++++-------------------------
 1 file changed, 13 insertions(+), 33 deletions(-)

diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c
index 72d64d39d42a..4e18bdf05ac4 100644
--- a/arch/arm/mach-davinci/da850.c
+++ b/arch/arm/mach-davinci/da850.c
@@ -34,7 +34,8 @@
 #include <mach/cputype.h>
 #include <mach/da8xx.h>
 #include <mach/pm.h>
-#include <mach/time.h>
+
+#include <clocksource/timer-davinci.h>
 
 #include "irqs.h"
 #include "mux.h"
@@ -332,38 +333,16 @@ static struct davinci_id da850_ids[] = {
 	},
 };
 
-static struct davinci_timer_instance da850_timer_instance[4] = {
-	{
-		.base		= DA8XX_TIMER64P0_BASE,
-		.bottom_irq	= DAVINCI_INTC_IRQ(IRQ_DA8XX_TINT12_0),
-		.top_irq	= DAVINCI_INTC_IRQ(IRQ_DA8XX_TINT34_0),
-	},
-	{
-		.base		= DA8XX_TIMER64P1_BASE,
-		.bottom_irq	= DAVINCI_INTC_IRQ(IRQ_DA8XX_TINT12_1),
-		.top_irq	= DAVINCI_INTC_IRQ(IRQ_DA8XX_TINT34_1),
-	},
-	{
-		.base		= DA850_TIMER64P2_BASE,
-		.bottom_irq	= DAVINCI_INTC_IRQ(IRQ_DA850_TINT12_2),
-		.top_irq	= DAVINCI_INTC_IRQ(IRQ_DA850_TINT34_2),
-	},
-	{
-		.base		= DA850_TIMER64P3_BASE,
-		.bottom_irq	= DAVINCI_INTC_IRQ(IRQ_DA850_TINT12_3),
-		.top_irq	= DAVINCI_INTC_IRQ(IRQ_DA850_TINT34_3),
-	},
-};
-
 /*
- * T0_BOT: Timer 0, bottom		: Used for clock_event
- * T0_TOP: Timer 0, top			: Used for clocksource
- * T1_BOT, T1_TOP: Timer 1, bottom & top: Used for watchdog timer
+ * Bottom half of timer 0 is used for clock_event, top half for
+ * clocksource.
  */
-static struct davinci_timer_info da850_timer_info = {
-	.timers		= da850_timer_instance,
-	.clockevent_id	= T0_BOT,
-	.clocksource_id	= T0_TOP,
+static const struct davinci_timer_cfg da850_timer_cfg = {
+	.reg = DEFINE_RES_IO(DA8XX_TIMER64P0_BASE, SZ_4K),
+	.irq = {
+		DEFINE_RES_IRQ(DAVINCI_INTC_IRQ(IRQ_DA8XX_TINT12_0)),
+		DEFINE_RES_IRQ(DAVINCI_INTC_IRQ(IRQ_DA8XX_TINT34_0)),
+	},
 };
 
 #ifdef CONFIG_CPU_FREQ
@@ -634,7 +613,6 @@ static const struct davinci_soc_info davinci_soc_info_da850 = {
 	.pinmux_base		= DA8XX_SYSCFG0_BASE + 0x120,
 	.pinmux_pins		= da850_pins,
 	.pinmux_pins_num	= ARRAY_SIZE(da850_pins),
-	.timer_info		= &da850_timer_info,
 	.emac_pdata		= &da8xx_emac_pdata,
 	.sram_dma		= DA8XX_SHARED_RAM_BASE,
 	.sram_len		= SZ_128K,
@@ -671,6 +649,7 @@ void __init da850_init_time(void)
 	void __iomem *pll0;
 	struct regmap *cfgchip;
 	struct clk *clk;
+	int rv;
 
 	clk_register_fixed_rate(NULL, "ref_clk", NULL, 0, DA850_REF_FREQ);
 
@@ -685,7 +664,8 @@ void __init da850_init_time(void)
 		return;
 	}
 
-	davinci_timer_init(clk);
+	rv = davinci_timer_register(clk, &da850_timer_cfg);
+	WARN(rv, "Unable to register the timer: %d\n", rv);
 }
 
 static struct resource da850_pll1_resources[] = {
-- 
2.20.1




More information about the linux-arm-kernel mailing list