linux-kernel - [PATCH_V2 13/34] MIPS: jz4740: replace use of jz4740_clock

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Date:	Wed, 4 Feb 2015 15:21:42 +0000
From:	Zubair Lutfullah Kakakhel <Zubair.Kakakhel@...tec.com>
To:	<linux-mips@...ux-mips.org>
CC:	<devicetree@...r.kernel.org>, <linux-serial@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <Zubair.Kakakhel@...tec.com>,
	<gregkh@...uxfoundation.org>, <mturquette@...aro.org>,
	<sboyd@...eaurora.org>, <ralf@...ux-mips.org>, <jslaby@...e.cz>,
	<tglx@...utronix.de>, <jason@...edaemon.net>, <lars@...afoo.de>,
	<paul.burton@...tec.com>
Subject: [PATCH_V2 13/34] MIPS: jz4740: replace use of jz4740_clock_bdata

From: Paul Burton <paul.burton@...tec.com>

Replace uses of the jz4740_clock_bdata struct with calls to clk_get_rate
for the appropriate clock. This is in preparation for migrating the
clocks towards common clock framework & devicetree.

Signed-off-by: Paul Burton <paul.burton@...tec.com>
Cc: Lars-Peter Clausen <lars@...afoo.de>
---
 arch/mips/jz4740/platform.c | 11 ++++++++++-
 arch/mips/jz4740/reset.c    | 13 +++++++++++--
 arch/mips/jz4740/time.c     |  9 ++++++++-
 3 files changed, 29 insertions(+), 4 deletions(-)

diff --git a/arch/mips/jz4740/platform.c b/arch/mips/jz4740/platform.c
index 0b12f27..2a5c7c7 100644
--- a/arch/mips/jz4740/platform.c
+++ b/arch/mips/jz4740/platform.c
@@ -13,6 +13,7 @@
  *
  */
 
+#include <linux/clk.h>
 #include <linux/device.h>
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
@@ -308,9 +309,17 @@ static struct platform_device jz4740_uart_device = {
 void jz4740_serial_device_register(void)
 {
 	struct plat_serial8250_port *p;
+	struct clk *ext_clk;
+	unsigned long ext_rate;
+
+	ext_clk = clk_get(NULL, "ext");
+	if (IS_ERR(ext_clk))
+		panic("unable to get ext clock");
+	ext_rate = clk_get_rate(ext_clk);
+	clk_put(ext_clk);
 
 	for (p = jz4740_uart_data; p->flags != 0; ++p)
-		p->uartclk = jz4740_clock_bdata.ext_rate;
+		p->uartclk = ext_rate;
 
 	platform_device_register(&jz4740_uart_device);
 }
diff --git a/arch/mips/jz4740/reset.c b/arch/mips/jz4740/reset.c
index b6c6343..954e669 100644
--- a/arch/mips/jz4740/reset.c
+++ b/arch/mips/jz4740/reset.c
@@ -12,6 +12,7 @@
  *
  */
 
+#include <linux/clk.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/pm.h>
@@ -79,12 +80,20 @@ static void jz4740_power_off(void)
 	void __iomem *rtc_base = ioremap(JZ4740_RTC_BASE_ADDR, 0x38);
 	unsigned long wakeup_filter_ticks;
 	unsigned long reset_counter_ticks;
+	struct clk *rtc_clk;
+	unsigned long rtc_rate;
+
+	rtc_clk = clk_get(NULL, "rtc");
+	if (IS_ERR(rtc_clk))
+		panic("unable to get RTC clock");
+	rtc_rate = clk_get_rate(rtc_clk);
+	clk_put(rtc_clk);
 
 	/*
 	 * Set minimum wakeup pin assertion time: 100 ms.
 	 * Range is 0 to 2 sec if RTC is clocked at 32 kHz.
 	 */
-	wakeup_filter_ticks = (100 * jz4740_clock_bdata.rtc_rate) / 1000;
+	wakeup_filter_ticks = (100 * rtc_rate) / 1000;
 	if (wakeup_filter_ticks < JZ_RTC_WAKEUP_FILTER_MASK)
 		wakeup_filter_ticks &= JZ_RTC_WAKEUP_FILTER_MASK;
 	else
@@ -96,7 +105,7 @@ static void jz4740_power_off(void)
 	 * Set reset pin low-level assertion time after wakeup: 60 ms.
 	 * Range is 0 to 125 ms if RTC is clocked at 32 kHz.
 	 */
-	reset_counter_ticks = (60 * jz4740_clock_bdata.rtc_rate) / 1000;
+	reset_counter_ticks = (60 * rtc_rate) / 1000;
 	if (reset_counter_ticks < JZ_RTC_RESET_COUNTER_MASK)
 		reset_counter_ticks &= JZ_RTC_RESET_COUNTER_MASK;
 	else
diff --git a/arch/mips/jz4740/time.c b/arch/mips/jz4740/time.c
index 9424344..bff2ac9 100644
--- a/arch/mips/jz4740/time.c
+++ b/arch/mips/jz4740/time.c
@@ -13,6 +13,7 @@
  *
  */
 
+#include <linux/clk.h>
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/time.h>
@@ -109,11 +110,17 @@ void __init plat_time_init(void)
 	int ret;
 	uint32_t clk_rate;
 	uint16_t ctrl;
+	struct clk *ext_clk;
 
 	jz4740_clock_init();
 	jz4740_timer_init();
 
-	clk_rate = jz4740_clock_bdata.ext_rate >> 4;
+	ext_clk = clk_get(NULL, "ext");
+	if (IS_ERR(ext_clk))
+		panic("unable to get ext clock");
+	clk_rate = clk_get_rate(ext_clk) >> 4;
+	clk_put(ext_clk);
+
 	jz4740_jiffies_per_tick = DIV_ROUND_CLOSEST(clk_rate, HZ);
 
 	clockevent_set_clock(&jz4740_clockevent, clk_rate);
-- 
1.9.1

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