linux-kernel - [PATCH 2/8] ARM: am33xx: clk: Add optional clock for EHRPWM

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Message-ID: <1352106749-9437-3-git-send-email-avinashphilip@ti.com>
Date:	Mon, 5 Nov 2012 14:42:23 +0530
From:	"Philip, Avinash" <avinashphilip@...com>
To:	<thierry.reding@...onic-design.de>, <paul@...an.com>,
	<tony@...mide.com>, <linux@....linux.org.uk>, <b-cousson@...com>
CC:	<hvaibhav@...com>, <anilkumar@...com>,
	<linux-kernel@...r.kernel.org>,
	<devicetree-discuss@...ts.ozlabs.org>, <linux-doc@...r.kernel.org>,
	<linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <nsekhar@...com>,
	<gururaja.hebbar@...com>, "Philip, Avinash" <avinashphilip@...com>
Subject: [PATCH 2/8] ARM: am33xx: clk: Add optional clock for EHRPWM

EHRPWM module requires explicit clock gating from control module.
Hence add clock node in clock tree for EHRPWM modules.

Signed-off-by: Philip, Avinash <avinashphilip@...com>
---
:100644 100644 17e3de5... 833260f... M	arch/arm/mach-omap2/clock33xx_data.c
:100644 100644 a89e825... c0e34e6... M	arch/arm/mach-omap2/control.h
 arch/arm/mach-omap2/clock33xx_data.c |   37 ++++++++++++++++++++++++++++++++++
 arch/arm/mach-omap2/control.h        |    8 +++++++
 2 files changed, 45 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/clock33xx_data.c b/arch/arm/mach-omap2/clock33xx_data.c
index 17e3de5..833260f 100644
--- a/arch/arm/mach-omap2/clock33xx_data.c
+++ b/arch/arm/mach-omap2/clock33xx_data.c
@@ -995,6 +995,40 @@ static struct clk wdt1_fck = {
 };
 
 /*
+ * PWMSS Time based module clock node. This node is
+ * requred to enable clock gating for EHRPWM TBCLK.
+ */
+static struct clk ehrpwm0_tbclk = {
+	.name		= "ehrpwm0_tbclk",
+	.clkdm_name	= "l4ls_clkdm",
+	.enable_reg	= AM33XX_CTRL_REGADDR(AM33XX_PWMSS_TBCLK_CLKCTRL),
+	.enable_bit	= AM33XX_PWMSS0_TBCLKEN_SHIFT,
+	.ops		= &clkops_omap2_dflt,
+	.parent		= &l4ls_gclk,
+	.recalc		= &followparent_recalc,
+};
+
+static struct clk ehrpwm1_tbclk = {
+	.name		= "ehrpwm1_tbclk",
+	.clkdm_name	= "l4ls_clkdm",
+	.enable_reg	= AM33XX_CTRL_REGADDR(AM33XX_PWMSS_TBCLK_CLKCTRL),
+	.enable_bit	= AM33XX_PWMSS1_TBCLKEN_SHIFT,
+	.ops		= &clkops_omap2_dflt,
+	.parent		= &l4ls_gclk,
+	.recalc		= &followparent_recalc,
+};
+
+static struct clk ehrpwm2_tbclk = {
+	.name		= "ehrpwm2_tbclk",
+	.clkdm_name	= "l4ls_clkdm",
+	.enable_reg	= AM33XX_CTRL_REGADDR(AM33XX_PWMSS_TBCLK_CLKCTRL),
+	.enable_bit	= AM33XX_PWMSS2_TBCLKEN_SHIFT,
+	.ops		= &clkops_omap2_dflt,
+	.parent		= &l4ls_gclk,
+	.recalc		= &followparent_recalc,
+};
+
+/*
  * clkdev
  */
 static struct omap_clk am33xx_clks[] = {
@@ -1074,6 +1108,9 @@ static struct omap_clk am33xx_clks[] = {
 	CLK(NULL,	"clkout2_ck",		&clkout2_ck,	CK_AM33XX),
 	CLK(NULL,	"timer_32k_ck",		&clkdiv32k_ick,	CK_AM33XX),
 	CLK(NULL,	"timer_sys_ck",		&sys_clkin_ck,	CK_AM33XX),
+	CLK(NULL,	"ehrpwm0_tbclk",	&ehrpwm0_tbclk,	CK_AM33XX),
+	CLK(NULL,	"ehrpwm1_tbclk",	&ehrpwm1_tbclk,	CK_AM33XX),
+	CLK(NULL,	"ehrpwm2_tbclk",	&ehrpwm2_tbclk,	CK_AM33XX),
 };
 
 int __init am33xx_clk_init(void)
diff --git a/arch/arm/mach-omap2/control.h b/arch/arm/mach-omap2/control.h
index a89e825..c0e34e6 100644
--- a/arch/arm/mach-omap2/control.h
+++ b/arch/arm/mach-omap2/control.h
@@ -357,6 +357,14 @@
 #define AM33XX_CONTROL_STATUS_SYSBOOT1_WIDTH		0x2
 #define AM33XX_CONTROL_STATUS_SYSBOOT1_MASK		(0x3 << 22)
 
+/* AM33XX PWMSS Control register */
+#define AM33XX_PWMSS_TBCLK_CLKCTRL			0x664
+
+/* AM33XX  PWMSS Control bitfields */
+#define AM33XX_PWMSS0_TBCLKEN_SHIFT			0
+#define AM33XX_PWMSS1_TBCLKEN_SHIFT			1
+#define AM33XX_PWMSS2_TBCLKEN_SHIFT			2
+
 /* CONTROL OMAP STATUS register to identify OMAP3 features */
 #define OMAP3_CONTROL_OMAP_STATUS	0x044c
 
-- 
1.7.0.4

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