ARM: dove: add clock gating control

This patch adds clock gates from the clock gating control register
available on dove. All clock gates are hooked up to tclk, except for
gigabit ethernet controller (ge) which is a child of gephy to allow
both enabled/disabled at the same time.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

2 files changed, 92 insertions, 19 deletions

diff --git a/arch/arm/mach-dove/common.c b/arch/arm/mach-dove/common.c
index 8629e3043acd..38e2cc3b206b 100644
--- a/arch/arm/mach-dove/common.c
+++ b/arch/arm/mach-dove/common.c
@@ -24,6 +24,7 @@
 #include <asm/mach/time.h>
 #include <asm/mach/pci.h>
 #include <mach/dove.h>
+#include <mach/pm.h>
 #include <mach/bridge-regs.h>
 #include <asm/mach/arch.h>
 #include <linux/irq.h>
@@ -69,14 +70,68 @@ void __init dove_map_io(void)
  * CLK tree
  ****************************************************************************/
 static int dove_tclk;
+
+static DEFINE_SPINLOCK(gating_lock);
 static struct clk *tclk;
 
+static struct clk __init *dove_register_gate(const char *name,
+					     const char *parent, u8 bit_idx)
+{
+	return clk_register_gate(NULL, name, parent, 0,
+				 (void __iomem *)CLOCK_GATING_CONTROL,
+				 bit_idx, 0, &gating_lock);
+}
+
 static void __init dove_clk_init(void)
 {
+	struct clk *usb0, *usb1, *sata, *pex0, *pex1, *sdio0, *sdio1;
+	struct clk *nand, *camera, *i2s0, *i2s1, *crypto, *ac97, *pdma;
+	struct clk *xor0, *xor1, *ge, *gephy;
+
 	tclk = clk_register_fixed_rate(NULL, "tclk", NULL, CLK_IS_ROOT,
 				       dove_tclk);
 
-	orion_clkdev_init(tclk);
+	usb0 = dove_register_gate("usb0", "tclk", CLOCK_GATING_BIT_USB0);
+	usb1 = dove_register_gate("usb1", "tclk", CLOCK_GATING_BIT_USB1);
+	sata = dove_register_gate("sata", "tclk", CLOCK_GATING_BIT_SATA);
+	pex0 = dove_register_gate("pex0", "tclk", CLOCK_GATING_BIT_PCIE0);
+	pex1 = dove_register_gate("pex1", "tclk", CLOCK_GATING_BIT_PCIE1);
+	sdio0 = dove_register_gate("sdio0", "tclk", CLOCK_GATING_BIT_SDIO0);
+	sdio1 = dove_register_gate("sdio1", "tclk", CLOCK_GATING_BIT_SDIO1);
+	nand = dove_register_gate("nand", "tclk", CLOCK_GATING_BIT_NAND);
+	camera = dove_register_gate("camera", "tclk", CLOCK_GATING_BIT_CAMERA);
+	i2s0 = dove_register_gate("i2s0", "tclk", CLOCK_GATING_BIT_I2S0);
+	i2s1 = dove_register_gate("i2s1", "tclk", CLOCK_GATING_BIT_I2S1);
+	crypto = dove_register_gate("crypto", "tclk", CLOCK_GATING_BIT_CRYPTO);
+	ac97 = dove_register_gate("ac97", "tclk", CLOCK_GATING_BIT_AC97);
+	pdma = dove_register_gate("pdma", "tclk", CLOCK_GATING_BIT_PDMA);
+	xor0 = dove_register_gate("xor0", "tclk", CLOCK_GATING_BIT_XOR0);
+	xor1 = dove_register_gate("xor1", "tclk", CLOCK_GATING_BIT_XOR1);
+	gephy = dove_register_gate("gephy", "tclk", CLOCK_GATING_BIT_GIGA_PHY);
+	ge = dove_register_gate("ge", "gephy", CLOCK_GATING_BIT_GBE);
+
+	orion_clkdev_add(NULL, "orion_spi.0", tclk);
+	orion_clkdev_add(NULL, "orion_spi.1", tclk);
+	orion_clkdev_add(NULL, "orion_wdt", tclk);
+	orion_clkdev_add(NULL, "mv64xxx_i2c.0", tclk);
+
+	orion_clkdev_add(NULL, "orion-ehci.0", usb0);
+	orion_clkdev_add(NULL, "orion-ehci.1", usb1);
+	orion_clkdev_add(NULL, "mv643xx_eth.0", ge);
+	orion_clkdev_add("0", "sata_mv.0", sata);
+	orion_clkdev_add("0", "pcie", pex0);
+	orion_clkdev_add("1", "pcie", pex1);
+	orion_clkdev_add(NULL, "sdhci-dove.0", sdio0);
+	orion_clkdev_add(NULL, "sdhci-dove.1", sdio1);
+	orion_clkdev_add(NULL, "orion_nand", nand);
+	orion_clkdev_add(NULL, "cafe1000-ccic.0", camera);
+	orion_clkdev_add(NULL, "kirkwood-i2s.0", i2s0);
+	orion_clkdev_add(NULL, "kirkwood-i2s.1", i2s1);
+	orion_clkdev_add(NULL, "mv_crypto", crypto);
+	orion_clkdev_add(NULL, "dove-ac97", ac97);
+	orion_clkdev_add(NULL, "dove-pdma", pdma);
+	orion_clkdev_add(NULL, "mv_xor_shared.0", xor0);
+	orion_clkdev_add(NULL, "mv_xor_shared.1", xor1);
 }
 
 /*****************************************************************************
diff --git a/arch/arm/mach-dove/include/mach/pm.h b/arch/arm/mach-dove/include/mach/pm.h
index 3ad9f946a9e8..7bcd0dfce4b1 100644
--- a/arch/arm/mach-dove/include/mach/pm.h
+++ b/arch/arm/mach-dove/include/mach/pm.h
@@ -13,24 +13,42 @@
 #include <mach/irqs.h>
 
 #define CLOCK_GATING_CONTROL	(DOVE_PMU_VIRT_BASE + 0x38)
-#define  CLOCK_GATING_USB0_MASK		(1 << 0)
-#define  CLOCK_GATING_USB1_MASK		(1 << 1)
-#define  CLOCK_GATING_GBE_MASK		(1 << 2)
-#define  CLOCK_GATING_SATA_MASK		(1 << 3)
-#define  CLOCK_GATING_PCIE0_MASK	(1 << 4)
-#define  CLOCK_GATING_PCIE1_MASK	(1 << 5)
-#define  CLOCK_GATING_SDIO0_MASK	(1 << 8)
-#define  CLOCK_GATING_SDIO1_MASK	(1 << 9)
-#define  CLOCK_GATING_NAND_MASK		(1 << 10)
-#define  CLOCK_GATING_CAMERA_MASK	(1 << 11)
-#define  CLOCK_GATING_I2S0_MASK		(1 << 12)
-#define  CLOCK_GATING_I2S1_MASK		(1 << 13)
-#define  CLOCK_GATING_CRYPTO_MASK	(1 << 15)
-#define  CLOCK_GATING_AC97_MASK		(1 << 21)
-#define  CLOCK_GATING_PDMA_MASK		(1 << 22)
-#define  CLOCK_GATING_XOR0_MASK		(1 << 23)
-#define  CLOCK_GATING_XOR1_MASK		(1 << 24)
-#define  CLOCK_GATING_GIGA_PHY_MASK	(1 << 30)
+#define  CLOCK_GATING_BIT_USB0		0
+#define  CLOCK_GATING_BIT_USB1		1
+#define  CLOCK_GATING_BIT_GBE		2
+#define  CLOCK_GATING_BIT_SATA		3
+#define  CLOCK_GATING_BIT_PCIE0		4
+#define  CLOCK_GATING_BIT_PCIE1		5
+#define  CLOCK_GATING_BIT_SDIO0		8
+#define  CLOCK_GATING_BIT_SDIO1		9
+#define  CLOCK_GATING_BIT_NAND		10
+#define  CLOCK_GATING_BIT_CAMERA	11
+#define  CLOCK_GATING_BIT_I2S0		12
+#define  CLOCK_GATING_BIT_I2S1		13
+#define  CLOCK_GATING_BIT_CRYPTO	15
+#define  CLOCK_GATING_BIT_AC97		21
+#define  CLOCK_GATING_BIT_PDMA		22
+#define  CLOCK_GATING_BIT_XOR0		23
+#define  CLOCK_GATING_BIT_XOR1		24
+#define  CLOCK_GATING_BIT_GIGA_PHY	30
+#define  CLOCK_GATING_USB0_MASK		(1 << CLOCK_GATING_BIT_USB0)
+#define  CLOCK_GATING_USB1_MASK		(1 << CLOCK_GATING_BIT_USB1)
+#define  CLOCK_GATING_GBE_MASK		(1 << CLOCK_GATING_BIT_GBE)
+#define  CLOCK_GATING_SATA_MASK		(1 << CLOCK_GATING_BIT_SATA)
+#define  CLOCK_GATING_PCIE0_MASK	(1 << CLOCK_GATING_BIT_PCIE0)
+#define  CLOCK_GATING_PCIE1_MASK	(1 << CLOCK_GATING_BIT_PCIE1)
+#define  CLOCK_GATING_SDIO0_MASK	(1 << CLOCK_GATING_BIT_SDIO0)
+#define  CLOCK_GATING_SDIO1_MASK	(1 << CLOCK_GATING_BIT_SDIO1)
+#define  CLOCK_GATING_NAND_MASK		(1 << CLOCK_GATING_BIT_NAND)
+#define  CLOCK_GATING_CAMERA_MASK	(1 << CLOCK_GATING_BIT_CAMERA)
+#define  CLOCK_GATING_I2S0_MASK		(1 << CLOCK_GATING_BIT_I2S0)
+#define  CLOCK_GATING_I2S1_MASK		(1 << CLOCK_GATING_BIT_I2S1)
+#define  CLOCK_GATING_CRYPTO_MASK	(1 << CLOCK_GATING_BIT_CRYPTO)
+#define  CLOCK_GATING_AC97_MASK		(1 << CLOCK_GATING_BIT_AC97)
+#define  CLOCK_GATING_PDMA_MASK		(1 << CLOCK_GATING_BIT_PDMA)
+#define  CLOCK_GATING_XOR0_MASK		(1 << CLOCK_GATING_BIT_XOR0)
+#define  CLOCK_GATING_XOR1_MASK		(1 << CLOCK_GATING_BIT_XOR1)
+#define  CLOCK_GATING_GIGA_PHY_MASK	(1 << CLOCK_GATING_BIT_GIGA_PHY)
 
 #define PMU_INTERRUPT_CAUSE	(DOVE_PMU_VIRT_BASE + 0x50)
 #define PMU_INTERRUPT_MASK	(DOVE_PMU_VIRT_BASE + 0x54)