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authorAndrew Lunn <andrew@lunn.ch>2011-12-15 08:15:07 +0100
committerMike Turquette <mturquette@linaro.org>2012-05-08 16:33:39 -0700
commit2f129bf4aab684bef1e82e747b709a5025ecb698 (patch)
tree4be6e04fc306cfad25b3b86f831cd4d462c10f44
parentf0948f59dbc8e725a96ba16da666e8f5cdd43ba8 (diff)
downloadlinux-linaro-stable-2f129bf4aab684bef1e82e747b709a5025ecb698.tar.gz
ARM: Orion: Add clocks using the generic clk infrastructure.
Add tclk as a fixed rate clock for all platforms. In addition, on kirkwood, add a gated clock for most of the clocks which can be gated. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Tested-by: Jamie Lentin <jm@lentin.co.uk> [mturquette@linaro.org: removed redundant CLKDEV_LOOKUP from Kconfig] [mturquette@linaro.org: removed redundant clk.h from mach-dove/common.c] Signed-off-by: Mike Turquette <mturquette@linaro.org>
-rw-r--r--arch/arm/Kconfig1
-rw-r--r--arch/arm/mach-dove/common.c22
-rw-r--r--arch/arm/mach-kirkwood/board-dt.c3
-rw-r--r--arch/arm/mach-kirkwood/common.c41
-rw-r--r--arch/arm/mach-kirkwood/common.h1
-rw-r--r--arch/arm/mach-kirkwood/include/mach/bridge-regs.h16
-rw-r--r--arch/arm/mach-mv78xx0/common.c27
-rw-r--r--arch/arm/mach-orion5x/common.c15
-rw-r--r--arch/arm/plat-orion/common.c2
9 files changed, 115 insertions, 13 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index cf006d40342c..9be624af131f 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1139,6 +1139,7 @@ config PLAT_ORION
bool
select CLKSRC_MMIO
select GENERIC_IRQ_CHIP
+ select COMMON_CLK
config PLAT_PXA
bool
diff --git a/arch/arm/mach-dove/common.c b/arch/arm/mach-dove/common.c
index bda7aca04ca0..63fe6e612e98 100644
--- a/arch/arm/mach-dove/common.c
+++ b/arch/arm/mach-dove/common.c
@@ -13,7 +13,7 @@
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/pci.h>
-#include <linux/clk.h>
+#include <linux/clk-provider.h>
#include <linux/ata_platform.h>
#include <linux/gpio.h>
#include <asm/page.h>
@@ -68,6 +68,17 @@ void __init dove_map_io(void)
}
/*****************************************************************************
+ * CLK tree
+ ****************************************************************************/
+static struct clk *tclk;
+
+static void __init clk_init(void)
+{
+ tclk = clk_register_fixed_rate(NULL, "tclk", NULL, CLK_IS_ROOT,
+ get_tclk());
+}
+
+/*****************************************************************************
* EHCI0
****************************************************************************/
void __init dove_ehci0_init(void)
@@ -272,18 +283,17 @@ void __init dove_sdio1_init(void)
void __init dove_init(void)
{
- int tclk;
-
- tclk = get_tclk();
-
printk(KERN_INFO "Dove 88AP510 SoC, ");
- printk(KERN_INFO "TCLK = %dMHz\n", (tclk + 499999) / 1000000);
+ printk(KERN_INFO "TCLK = %dMHz\n", (get_tclk() + 499999) / 1000000);
#ifdef CONFIG_CACHE_TAUROS2
tauros2_init();
#endif
dove_setup_cpu_mbus();
+ /* Setup root of clk tree */
+ clk_init();
+
/* internal devices that every board has */
dove_rtc_init();
dove_xor0_init();
diff --git a/arch/arm/mach-kirkwood/board-dt.c b/arch/arm/mach-kirkwood/board-dt.c
index 1c672d9e6656..87856b5a397d 100644
--- a/arch/arm/mach-kirkwood/board-dt.c
+++ b/arch/arm/mach-kirkwood/board-dt.c
@@ -42,6 +42,9 @@ static void __init kirkwood_dt_init(void)
kirkwood_l2_init();
#endif
+ /* Setup root of clk tree */
+ kirkwood_clk_init();
+
/* internal devices that every board has */
kirkwood_wdt_init();
kirkwood_xor0_init();
diff --git a/arch/arm/mach-kirkwood/common.c b/arch/arm/mach-kirkwood/common.c
index a02cae881f2f..57b8d1ef3093 100644
--- a/arch/arm/mach-kirkwood/common.c
+++ b/arch/arm/mach-kirkwood/common.c
@@ -15,6 +15,8 @@
#include <linux/ata_platform.h>
#include <linux/mtd/nand.h>
#include <linux/dma-mapping.h>
+#include <linux/clk-provider.h>
+#include <linux/spinlock.h>
#include <net/dsa.h>
#include <asm/page.h>
#include <asm/timex.h>
@@ -31,6 +33,7 @@
#include <plat/common.h>
#include <plat/time.h>
#include <plat/addr-map.h>
+#include <plat/mv_xor.h>
#include "common.h"
/*****************************************************************************
@@ -69,6 +72,41 @@ unsigned int kirkwood_clk_ctrl = CGC_DUNIT | CGC_RESERVED;
/*****************************************************************************
+ * CLK tree
+ ****************************************************************************/
+static DEFINE_SPINLOCK(gating_lock);
+static struct clk *tclk;
+
+static struct clk __init *kirkwood_register_gate(const char *name, u8 bit_idx)
+{
+ return clk_register_gate(NULL, name, "tclk", CLK_IGNORE_UNUSED,
+ (void __iomem *)CLOCK_GATING_CTRL,
+ bit_idx, 0, &gating_lock);
+}
+
+void __init kirkwood_clk_init(void)
+{
+ tclk = clk_register_fixed_rate(NULL, "tclk", NULL,
+ CLK_IS_ROOT, kirkwood_tclk);
+
+ kirkwood_register_gate("runit", CGC_BIT_RUNIT);
+ kirkwood_register_gate("ge0", CGC_BIT_GE0);
+ kirkwood_register_gate("ge1", CGC_BIT_GE1);
+ kirkwood_register_gate("sata0", CGC_BIT_SATA0);
+ kirkwood_register_gate("sata1", CGC_BIT_SATA1);
+ kirkwood_register_gate("usb0", CGC_BIT_USB0);
+ kirkwood_register_gate("sdio", CGC_BIT_SDIO);
+ kirkwood_register_gate("crypto", CGC_BIT_CRYPTO);
+ kirkwood_register_gate("xor0", CGC_BIT_XOR0);
+ kirkwood_register_gate("xor1", CGC_BIT_XOR1);
+ kirkwood_register_gate("pex0", CGC_BIT_PEX0);
+ kirkwood_register_gate("pex1", CGC_BIT_PEX1);
+ kirkwood_register_gate("audio", CGC_BIT_AUDIO);
+ kirkwood_register_gate("tdm", CGC_BIT_TDM);
+ kirkwood_register_gate("tsu", CGC_BIT_TSU);
+}
+
+/*****************************************************************************
* EHCI0
****************************************************************************/
void __init kirkwood_ehci_init(void)
@@ -465,6 +503,9 @@ void __init kirkwood_init(void)
kirkwood_l2_init();
#endif
+ /* Setup root of clk tree */
+ kirkwood_clk_init();
+
/* internal devices that every board has */
kirkwood_rtc_init();
kirkwood_wdt_init();
diff --git a/arch/arm/mach-kirkwood/common.h b/arch/arm/mach-kirkwood/common.h
index fa8e7689c436..0729b11a3e2a 100644
--- a/arch/arm/mach-kirkwood/common.h
+++ b/arch/arm/mach-kirkwood/common.h
@@ -50,6 +50,7 @@ void kirkwood_nand_init(struct mtd_partition *parts, int nr_parts, int delay);
void kirkwood_nand_init_rnb(struct mtd_partition *parts, int nr_parts, int (*dev_ready)(struct mtd_info *));
void kirkwood_audio_init(void);
void kirkwood_restart(char, const char *);
+void kirkwood_clk_init(void);
/* board init functions for boards not fully converted to fdt */
#ifdef CONFIG_MACH_DREAMPLUG_DT
diff --git a/arch/arm/mach-kirkwood/include/mach/bridge-regs.h b/arch/arm/mach-kirkwood/include/mach/bridge-regs.h
index 957bd7997d7e..3eee37a3b501 100644
--- a/arch/arm/mach-kirkwood/include/mach/bridge-regs.h
+++ b/arch/arm/mach-kirkwood/include/mach/bridge-regs.h
@@ -43,6 +43,22 @@
#define L2_WRITETHROUGH 0x00000010
#define CLOCK_GATING_CTRL (BRIDGE_VIRT_BASE | 0x11c)
+#define CGC_BIT_GE0 (0)
+#define CGC_BIT_PEX0 (2)
+#define CGC_BIT_USB0 (3)
+#define CGC_BIT_SDIO (4)
+#define CGC_BIT_TSU (5)
+#define CGC_BIT_DUNIT (6)
+#define CGC_BIT_RUNIT (7)
+#define CGC_BIT_XOR0 (8)
+#define CGC_BIT_AUDIO (9)
+#define CGC_BIT_SATA0 (14)
+#define CGC_BIT_SATA1 (15)
+#define CGC_BIT_XOR1 (16)
+#define CGC_BIT_CRYPTO (17)
+#define CGC_BIT_PEX1 (18)
+#define CGC_BIT_GE1 (19)
+#define CGC_BIT_TDM (20)
#define CGC_GE0 (1 << 0)
#define CGC_PEX0 (1 << 2)
#define CGC_USB0 (1 << 3)
diff --git a/arch/arm/mach-mv78xx0/common.c b/arch/arm/mach-mv78xx0/common.c
index a5dcf766a3f9..73733207f5a9 100644
--- a/arch/arm/mach-mv78xx0/common.c
+++ b/arch/arm/mach-mv78xx0/common.c
@@ -13,6 +13,7 @@
#include <linux/platform_device.h>
#include <linux/serial_8250.h>
#include <linux/ata_platform.h>
+#include <linux/clk-provider.h>
#include <linux/ethtool.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
@@ -103,24 +104,24 @@ static void get_pclk_l2clk(int hclk, int core_index, int *pclk, int *l2clk)
static int get_tclk(void)
{
- int tclk;
+ int tclk_freq;
/*
* TCLK tick rate is configured by DEV_A[2:0] strap pins.
*/
switch ((readl(SAMPLE_AT_RESET_HIGH) >> 6) & 7) {
case 1:
- tclk = 166666667;
+ tclk_freq = 166666667;
break;
case 3:
- tclk = 200000000;
+ tclk_freq = 200000000;
break;
default:
panic("unknown TCLK PLL setting: %.8x\n",
readl(SAMPLE_AT_RESET_HIGH));
}
- return tclk;
+ return tclk_freq;
}
@@ -166,6 +167,17 @@ void __init mv78xx0_map_io(void)
/*****************************************************************************
+ * CLK tree
+ ****************************************************************************/
+static struct clk *tclk;
+
+static void __init clk_init(void)
+{
+ tclk = clk_register_fixed_rate(NULL, "tclk", NULL, CLK_IS_ROOT,
+ get_tclk());
+}
+
+/*****************************************************************************
* EHCI
****************************************************************************/
void __init mv78xx0_ehci0_init(void)
@@ -378,25 +390,26 @@ void __init mv78xx0_init(void)
int hclk;
int pclk;
int l2clk;
- int tclk;
core_index = mv78xx0_core_index();
hclk = get_hclk();
get_pclk_l2clk(hclk, core_index, &pclk, &l2clk);
- tclk = get_tclk();
printk(KERN_INFO "%s ", mv78xx0_id());
printk("core #%d, ", core_index);
printk("PCLK = %dMHz, ", (pclk + 499999) / 1000000);
printk("L2 = %dMHz, ", (l2clk + 499999) / 1000000);
printk("HCLK = %dMHz, ", (hclk + 499999) / 1000000);
- printk("TCLK = %dMHz\n", (tclk + 499999) / 1000000);
+ printk("TCLK = %dMHz\n", (get_tclk() + 499999) / 1000000);
mv78xx0_setup_cpu_mbus();
#ifdef CONFIG_CACHE_FEROCEON_L2
feroceon_l2_init(is_l2_writethrough());
#endif
+
+ /* Setup root of clk tree */
+ clk_init();
}
void mv78xx0_restart(char mode, const char *cmd)
diff --git a/arch/arm/mach-orion5x/common.c b/arch/arm/mach-orion5x/common.c
index 24481666d2cd..81660522c6b4 100644
--- a/arch/arm/mach-orion5x/common.c
+++ b/arch/arm/mach-orion5x/common.c
@@ -18,6 +18,7 @@
#include <linux/mv643xx_i2c.h>
#include <linux/ata_platform.h>
#include <linux/delay.h>
+#include <linux/clk-provider.h>
#include <net/dsa.h>
#include <asm/page.h>
#include <asm/setup.h>
@@ -70,6 +71,17 @@ void __init orion5x_map_io(void)
/*****************************************************************************
+ * CLK tree
+ ****************************************************************************/
+static struct clk *tclk;
+
+static void __init clk_init(void)
+{
+ tclk = clk_register_fixed_rate(NULL, "tclk", NULL, CLK_IS_ROOT,
+ orion5x_tclk);
+}
+
+/*****************************************************************************
* EHCI0
****************************************************************************/
void __init orion5x_ehci0_init(void)
@@ -276,6 +288,9 @@ void __init orion5x_init(void)
*/
orion5x_setup_cpu_mbus_bridge();
+ /* Setup root of clk tree */
+ clk_init();
+
/*
* Don't issue "Wait for Interrupt" instruction if we are
* running on D0 5281 silicon.
diff --git a/arch/arm/plat-orion/common.c b/arch/arm/plat-orion/common.c
index 74daf5ed1432..4fdd2e7e74a1 100644
--- a/arch/arm/plat-orion/common.c
+++ b/arch/arm/plat-orion/common.c
@@ -14,6 +14,8 @@
#include <linux/dma-mapping.h>
#include <linux/serial_8250.h>
#include <linux/ata_platform.h>
+#include <linux/clk.h>
+#include <linux/clkdev.h>
#include <linux/mv643xx_eth.h>
#include <linux/mv643xx_i2c.h>
#include <net/dsa.h>