8 files changed, 461 insertions, 92 deletions

diff --git a/arch/arm/mach-omap1/io.c b/arch/arm/mach-omap1/io.c
index f1258c1f3a9..207df0fe934 100644
--- a/arch/arm/mach-omap1/io.c
+++ b/arch/arm/mach-omap1/io.c
@@ -17,6 +17,7 @@
 #include <asm/io.h>
 #include <asm/arch/tc.h>
 
+extern int clk_init(void);
 extern void omap_check_revision(void);
 
 /*
diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig
index a72fe55b513..345365852f8 100644
--- a/arch/arm/plat-omap/Kconfig
+++ b/arch/arm/plat-omap/Kconfig
@@ -19,6 +19,19 @@ endchoice
 
 comment "OMAP Feature Selections"
 
+config OMAP_RESET_CLOCKS
+        bool "Reset unused clocks during boot"
+        depends on ARCH_OMAP
+        default n
+        help
+          Say Y if you want to reset unused clocks during boot.
+          This option saves power, but assumes all drivers are
+          using the clock framework. Broken drivers that do not
+          yet use clock framework may not work with this option.
+          If you are booting from another operating system, you
+          probably do not want this option enabled until your
+          device drivers work properly.
+
 config OMAP_MUX
         bool "OMAP multiplexing support"
         depends on ARCH_OMAP
diff --git a/arch/arm/plat-omap/clock.c b/arch/arm/plat-omap/clock.c
index 155157f309e..59d91b3262b 100644
--- a/arch/arm/plat-omap/clock.c
+++ b/arch/arm/plat-omap/clock.c
@@ -14,6 +14,7 @@
 #include <linux/errno.h>
 #include <linux/err.h>
 
+#include <asm/io.h>
 #include <asm/semaphore.h>
 #include <asm/hardware/clock.h>
 #include <asm/arch/board.h>
@@ -25,6 +26,8 @@ static LIST_HEAD(clocks);
 static DECLARE_MUTEX(clocks_sem);
 static DEFINE_SPINLOCK(clockfw_lock);
 static void propagate_rate(struct clk *  clk);
+/* UART clock function */
+static int set_uart_rate(struct clk * clk, unsigned long rate);
 /* External clock (MCLK & BCLK) functions */
 static int set_ext_clk_rate(struct clk *  clk, unsigned long rate);
 static long round_ext_clk_rate(struct clk *  clk, unsigned long rate);
@@ -34,7 +37,7 @@ static int select_table_rate(struct clk *  clk, unsigned long rate);
 static long round_to_table_rate(struct clk *  clk, unsigned long rate);
 void clk_setdpll(__u16, __u16);
 
-struct mpu_rate rate_table[] = {
+static struct mpu_rate rate_table[] = {
         /* MPU MHz, xtal MHz, dpll1 MHz, CKCTL, DPLL_CTL
          * armdiv, dspdiv, dspmmu, tcdiv, perdiv, lcddiv
          */
@@ -48,7 +51,7 @@ struct mpu_rate rate_table[] = {
         { 192000000, 19200000, 192000000, 0x050f, 0x2510 }, /* 1/1/2/2/8/8 */
         { 192000000, 12000000, 192000000, 0x050f, 0x2810 }, /* 1/1/2/2/8/8 */
         {  96000000, 12000000, 192000000, 0x055f, 0x2810 }, /* 2/2/2/2/8/8 */
-        {  48000000, 12000000, 192000000, 0x0ccf, 0x2810 }, /* 4/4/4/4/8/8 */
+        {  48000000, 12000000, 192000000, 0x0baf, 0x2810 }, /* 4/8/4/4/8/8 */
         {  24000000, 12000000, 192000000, 0x0fff, 0x2810 }, /* 8/8/8/8/8/8 */
 #endif
 #if defined(CONFIG_OMAP_ARM_182MHZ)
@@ -58,7 +61,7 @@ struct mpu_rate rate_table[] = {
         { 168000000, 12000000, 168000000, 0x010f, 0x2710 }, /* 1/1/1/2/8/8 */
 #endif
 #if defined(CONFIG_OMAP_ARM_150MHZ)
-        { 150000000, 12000000, 150000000, 0x150a, 0x2cb0 }, /* 0/0/1/1/2/2 */
+        { 150000000, 12000000, 150000000, 0x010a, 0x2cb0 }, /* 1/1/1/2/4/4 */
 #endif
 #if defined(CONFIG_OMAP_ARM_120MHZ)
         { 120000000, 12000000, 120000000, 0x010a, 0x2510 }, /* 1/1/1/2/4/4 */
@@ -76,19 +79,11 @@ struct mpu_rate rate_table[] = {
 };
 
 
-static void ckctl_recalc(struct clk *  clk)
-{
-        int dsor;
-
-        /* Calculate divisor encoded as 2-bit exponent */
-        dsor = 1 << (3 & (omap_readw(ARM_CKCTL) >> clk->rate_offset));
-        if (unlikely(clk->rate == clk->parent->rate / dsor))
-                return; /* No change, quick exit */
-        clk->rate = clk->parent->rate / dsor;
-
-        if (unlikely(clk->flags & RATE_PROPAGATES))
-                propagate_rate(clk);
-}
+static void ckctl_recalc(struct clk *  clk);
+int __clk_enable(struct clk *clk);
+void __clk_disable(struct clk *clk);
+void __clk_unuse(struct clk *clk);
+int __clk_use(struct clk *clk);
 
 
 static void followparent_recalc(struct clk *  clk)
@@ -102,6 +97,14 @@ static void watchdog_recalc(struct clk *  clk)
         clk->rate = clk->parent->rate / 14;
 }
 
+static void uart_recalc(struct clk * clk)
+{
+        unsigned int val = omap_readl(clk->enable_reg);
+        if (val & clk->enable_bit)
+                clk->rate = 48000000;
+        else
+                clk->rate = 12000000;
+}
 
 static struct clk ck_ref = {
         .name           = "ck_ref",
@@ -138,7 +141,7 @@ static struct clk arm_ck = {
 static struct clk armper_ck = {
         .name           = "armper_ck",
         .parent         = &ck_dpll1,
-        .flags          = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
+        .flags          = CLOCK_IN_OMAP730 | CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
                           RATE_CKCTL,
         .enable_reg     = ARM_IDLECT2,
         .enable_bit     = EN_PERCK,
@@ -185,7 +188,7 @@ static struct clk armwdt_ck = {
 static struct clk arminth_ck16xx = {
         .name           = "arminth_ck",
         .parent         = &arm_ck,
-        .flags          = CLOCK_IN_OMAP16XX,
+        .flags          = CLOCK_IN_OMAP16XX | ALWAYS_ENABLED,
         .recalc         = &followparent_recalc,
         /* Note: On 16xx the frequency can be divided by 2 by programming
          * ARM_CKCTL:ARM_INTHCK_SEL(14) to 1
@@ -214,6 +217,38 @@ static struct clk dspmmu_ck = {
         .recalc         = &ckctl_recalc,
 };
 
+static struct clk dspper_ck = {
+        .name           = "dspper_ck",
+        .parent         = &ck_dpll1,
+        .flags          = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
+                          RATE_CKCTL | DSP_DOMAIN_CLOCK | VIRTUAL_IO_ADDRESS,
+        .enable_reg     = DSP_IDLECT2,
+        .enable_bit     = EN_PERCK,
+        .rate_offset    = CKCTL_PERDIV_OFFSET,
+        .recalc         = &followparent_recalc,
+        //.recalc               = &ckctl_recalc,
+};
+
+static struct clk dspxor_ck = {
+        .name           = "dspxor_ck",
+        .parent         = &ck_ref,
+        .flags          = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
+                          DSP_DOMAIN_CLOCK | VIRTUAL_IO_ADDRESS,
+        .enable_reg     = DSP_IDLECT2,
+        .enable_bit     = EN_XORPCK,
+        .recalc         = &followparent_recalc,
+};
+
+static struct clk dsptim_ck = {
+        .name           = "dsptim_ck",
+        .parent         = &ck_ref,
+        .flags          = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
+                          DSP_DOMAIN_CLOCK | VIRTUAL_IO_ADDRESS,
+        .enable_reg     = DSP_IDLECT2,
+        .enable_bit     = EN_DSPTIMCK,
+        .recalc         = &followparent_recalc,
+};
+
 static struct clk tc_ck = {
         .name           = "tc_ck",
         .parent         = &ck_dpll1,
@@ -226,7 +261,7 @@ static struct clk tc_ck = {
 static struct clk arminth_ck1510 = {
         .name           = "arminth_ck",
         .parent         = &tc_ck,
-        .flags          = CLOCK_IN_OMAP1510,
+        .flags          = CLOCK_IN_OMAP1510 | ALWAYS_ENABLED,
         .recalc         = &followparent_recalc,
         /* Note: On 1510 the frequency follows TC_CK
          *
@@ -237,7 +272,7 @@ static struct clk arminth_ck1510 = {
 static struct clk tipb_ck = {
         .name           = "tibp_ck",
         .parent         = &tc_ck,
-        .flags          = CLOCK_IN_OMAP1510,
+        .flags          = CLOCK_IN_OMAP1510 | ALWAYS_ENABLED,
         .recalc         = &followparent_recalc,
 };
 
@@ -271,14 +306,15 @@ static struct clk tc2_ck = {
 static struct clk dma_ck = {
         .name           = "dma_ck",
         .parent         = &tc_ck,
-        .flags          = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX,
+        .flags          = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
+                          ALWAYS_ENABLED,
         .recalc         = &followparent_recalc,
 };
 
 static struct clk dma_lcdfree_ck = {
         .name           = "dma_lcdfree_ck",
         .parent         = &tc_ck,
-        .flags          = CLOCK_IN_OMAP16XX,
+        .flags          = CLOCK_IN_OMAP16XX | ALWAYS_ENABLED,
         .recalc         = &followparent_recalc,
 };
 
@@ -303,14 +339,14 @@ static struct clk lb_ck = {
 static struct clk rhea1_ck = {
         .name           = "rhea1_ck",
         .parent         = &tc_ck,
-        .flags          = CLOCK_IN_OMAP16XX,
+        .flags          = CLOCK_IN_OMAP16XX | ALWAYS_ENABLED,
         .recalc         = &followparent_recalc,
 };
 
 static struct clk rhea2_ck = {
         .name           = "rhea2_ck",
         .parent         = &tc_ck,
-        .flags          = CLOCK_IN_OMAP16XX,
+        .flags          = CLOCK_IN_OMAP16XX | ALWAYS_ENABLED,
         .recalc         = &followparent_recalc,
 };
 
@@ -325,43 +361,55 @@ static struct clk lcd_ck = {
         .recalc         = &ckctl_recalc,
 };
 
-static struct clk uart1_ck = {
+static struct clk uart1_1510 = {
+        .name           = "uart1_ck",
+        /* Direct from ULPD, no parent */
+        .rate           = 12000000,
+        .flags          = CLOCK_IN_OMAP1510 | ENABLE_REG_32BIT | ALWAYS_ENABLED,
+        .enable_reg     = MOD_CONF_CTRL_0,
+        .enable_bit     = 29,   /* Chooses between 12MHz and 48MHz */
+        .set_rate       = &set_uart_rate,
+        .recalc         = &uart_recalc,
+};
+
+static struct clk uart1_16xx = {
         .name           = "uart1_ck",
         /* Direct from ULPD, no parent */
         .rate           = 48000000,
-        .flags          = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
-                          RATE_FIXED | ENABLE_REG_32BIT,
+        .flags          = CLOCK_IN_OMAP16XX | RATE_FIXED | ENABLE_REG_32BIT,
         .enable_reg     = MOD_CONF_CTRL_0,
         .enable_bit     = 29,
-        /* (Only on 1510)
-         * The "enable bit" actually chooses between 48MHz and 12MHz.
-         */
 };
 
 static struct clk uart2_ck = {
         .name           = "uart2_ck",
         /* Direct from ULPD, no parent */
-        .rate           = 48000000,
-        .flags          = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
-                          RATE_FIXED | ENABLE_REG_32BIT,
+        .rate           = 12000000,
+        .flags          = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | ENABLE_REG_32BIT,
         .enable_reg     = MOD_CONF_CTRL_0,
-        .enable_bit     = 30,
-        /* (for both 1510 and 16xx)
-         * The "enable bit" actually chooses between 48MHz and 12MHz/32kHz.
-         */
+        .enable_bit     = 30,   /* Chooses between 12MHz and 48MHz */
+        .set_rate       = &set_uart_rate,
+        .recalc         = &uart_recalc,
 };
 
-static struct clk uart3_ck = {
+static struct clk uart3_1510 = {
+        .name           = "uart3_ck",
+        /* Direct from ULPD, no parent */
+        .rate           = 12000000,
+        .flags          = CLOCK_IN_OMAP1510 | ENABLE_REG_32BIT | ALWAYS_ENABLED,
+        .enable_reg     = MOD_CONF_CTRL_0,
+        .enable_bit     = 31,   /* Chooses between 12MHz and 48MHz */
+        .set_rate       = &set_uart_rate,
+        .recalc         = &uart_recalc,
+};
+
+static struct clk uart3_16xx = {
         .name           = "uart3_ck",
         /* Direct from ULPD, no parent */
         .rate           = 48000000,
-        .flags          = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
-                          RATE_FIXED | ENABLE_REG_32BIT,
+        .flags          = CLOCK_IN_OMAP16XX | RATE_FIXED | ENABLE_REG_32BIT,
         .enable_reg     = MOD_CONF_CTRL_0,
         .enable_bit     = 31,
-        /* (Only on 1510)
-         * The "enable bit" actually chooses between 48MHz and 12MHz.
-         */
 };
 
 static struct clk usb_clko = {  /* 6 MHz output on W4_USB_CLKO */
@@ -480,6 +528,9 @@ static struct clk *  onchip_clks[] = {
         /* CK_GEN2 clocks */
         &dsp_ck,
         &dspmmu_ck,
+        &dspper_ck,
+        &dspxor_ck,
+        &dsptim_ck,
         /* CK_GEN3 clocks */
         &tc_ck,
         &tipb_ck,
@@ -494,9 +545,11 @@ static struct clk *  onchip_clks[] = {
         &rhea2_ck,
         &lcd_ck,
         /* ULPD clocks */
-        &uart1_ck,
+        &uart1_1510,
+        &uart1_16xx,
         &uart2_ck,
-        &uart3_ck,
+        &uart3_1510,
+        &uart3_16xx,
         &usb_clko,
         &usb_hhc_ck1510, &usb_hhc_ck16xx,
         &mclk_1510,  &mclk_16xx,
@@ -547,14 +600,34 @@ int __clk_enable(struct clk *clk)
                 return 0;
         }
 
+        if (clk->flags & DSP_DOMAIN_CLOCK) {
+                __clk_use(&api_ck);
+        }
+
         if (clk->flags & ENABLE_REG_32BIT) {
-                regval32 = omap_readl(clk->enable_reg);
-                regval32 |= (1 << clk->enable_bit);
-                omap_writel(regval32, clk->enable_reg);
+                if (clk->flags & VIRTUAL_IO_ADDRESS) {
+                        regval32 = __raw_readl(clk->enable_reg);
+                        regval32 |= (1 << clk->enable_bit);
+                        __raw_writel(regval32, clk->enable_reg);
+                } else {
+                        regval32 = omap_readl(clk->enable_reg);
+                        regval32 |= (1 << clk->enable_bit);
+                        omap_writel(regval32, clk->enable_reg);
+                }
         } else {
-                regval16 = omap_readw(clk->enable_reg);
-                regval16 |= (1 << clk->enable_bit);
-                omap_writew(regval16, clk->enable_reg);
+                if (clk->flags & VIRTUAL_IO_ADDRESS) {
+                        regval16 = __raw_readw(clk->enable_reg);
+                        regval16 |= (1 << clk->enable_bit);
+                        __raw_writew(regval16, clk->enable_reg);
+                } else {
+                        regval16 = omap_readw(clk->enable_reg);
+                        regval16 |= (1 << clk->enable_bit);
+                        omap_writew(regval16, clk->enable_reg);
+                }
+        }
+
+        if (clk->flags & DSP_DOMAIN_CLOCK) {
+                __clk_unuse(&api_ck);
         }
 
         return 0;
@@ -569,14 +642,34 @@ void __clk_disable(struct clk *clk)
         if (clk->enable_reg == 0)
                 return;
 
+        if (clk->flags & DSP_DOMAIN_CLOCK) {
+                __clk_use(&api_ck);
+        }
+
         if (clk->flags & ENABLE_REG_32BIT) {
-                regval32 = omap_readl(clk->enable_reg);
-                regval32 &= ~(1 << clk->enable_bit);
-                omap_writel(regval32, clk->enable_reg);
+                if (clk->flags & VIRTUAL_IO_ADDRESS) {
+                        regval32 = __raw_readl(clk->enable_reg);
+                        regval32 &= ~(1 << clk->enable_bit);
+                        __raw_writel(regval32, clk->enable_reg);
+                } else {
+                        regval32 = omap_readl(clk->enable_reg);
+                        regval32 &= ~(1 << clk->enable_bit);
+                        omap_writel(regval32, clk->enable_reg);
+                }
         } else {
-                regval16 = omap_readw(clk->enable_reg);
-                regval16 &= ~(1 << clk->enable_bit);
-                omap_writew(regval16, clk->enable_reg);
+                if (clk->flags & VIRTUAL_IO_ADDRESS) {
+                        regval16 = __raw_readw(clk->enable_reg);
+                        regval16 &= ~(1 << clk->enable_bit);
+                        __raw_writew(regval16, clk->enable_reg);
+                } else {
+                        regval16 = omap_readw(clk->enable_reg);
+                        regval16 &= ~(1 << clk->enable_bit);
+                        omap_writew(regval16, clk->enable_reg);
+                }
+        }
+
+        if (clk->flags & DSP_DOMAIN_CLOCK) {
+                __clk_unuse(&api_ck);
         }
 }
 
@@ -766,6 +859,33 @@ static int calc_dsor_exp(struct clk *clk, unsigned long rate)
         return dsor_exp;
 }
 
+
+static void ckctl_recalc(struct clk *  clk)
+{
+        int dsor;
+
+        /* Calculate divisor encoded as 2-bit exponent */
+        if (clk->flags & DSP_DOMAIN_CLOCK) {
+                /* The clock control bits are in DSP domain,
+                 * so api_ck is needed for access.
+                 * Note that DSP_CKCTL virt addr = phys addr, so
+                 * we must use __raw_readw() instead of omap_readw().
+                 */
+                __clk_use(&api_ck);
+                dsor = 1 << (3 & (__raw_readw(DSP_CKCTL) >> clk->rate_offset));
+                __clk_unuse(&api_ck);
+        } else {
+                dsor = 1 << (3 & (omap_readw(ARM_CKCTL) >> clk->rate_offset));
+        }
+        if (unlikely(clk->rate == clk->parent->rate / dsor))
+                return; /* No change, quick exit */
+        clk->rate = clk->parent->rate / dsor;
+
+        if (unlikely(clk->flags & RATE_PROPAGATES))
+                propagate_rate(clk);
+}
+
+
 long clk_round_rate(struct clk *clk, unsigned long rate)
 {
         int dsor_exp;
@@ -826,6 +946,9 @@ static int select_table_rate(struct clk *  clk, unsigned long rate)
         if (!ptr->rate)
                 return -EINVAL;
 
+        if (!ptr->rate)
+                return -EINVAL;
+
         if (unlikely(ck_dpll1.rate == 0)) {
                 omap_writew(ptr->dpllctl_val, DPLL_CTL);
                 ck_dpll1.rate = ptr->pll_rate;
@@ -921,6 +1044,23 @@ static unsigned calc_ext_dsor(unsigned long rate)
         return dsor;
 }
 
+/* Only needed on 1510 */
+static int set_uart_rate(struct clk * clk, unsigned long rate)
+{
+        unsigned int val;
+
+        val = omap_readl(clk->enable_reg);
+        if (rate == 12000000)
+                val &= ~(1 << clk->enable_bit);
+        else if (rate == 48000000)
+                val |= (1 << clk->enable_bit);
+        else
+                return -EINVAL;
+        omap_writel(val, clk->enable_reg);
+        clk->rate = rate;
+
+        return 0;
+}
 
 static int set_ext_clk_rate(struct clk *  clk, unsigned long rate)
 {
@@ -985,7 +1125,18 @@ void clk_unregister(struct clk *clk)
 }
 EXPORT_SYMBOL(clk_unregister);
 
-
+#ifdef CONFIG_OMAP_RESET_CLOCKS
+/*
+ * Resets some clocks that may be left on from bootloader,
+ * but leaves serial clocks on. See also omap_late_clk_reset().
+ */
+static inline void omap_early_clk_reset(void)
+{
+        //omap_writel(0x3 << 29, MOD_CONF_CTRL_0);
+}
+#else
+#define omap_early_clk_reset()  {}
+#endif
 
 int __init clk_init(void)
 {
@@ -993,6 +1144,8 @@ int __init clk_init(void)
         const struct omap_clock_config *info;
         int crystal_type = 0; /* Default 12 MHz */
 
+        omap_early_clk_reset();
+
         for (clkp = onchip_clks; clkp < onchip_clks+ARRAY_SIZE(onchip_clks); clkp++) {
                 if (((*clkp)->flags &CLOCK_IN_OMAP1510) && cpu_is_omap1510()) {
                         clk_register(*clkp);
@@ -1023,9 +1176,42 @@ int __init clk_init(void)
                 ck_ref.rate = 19200000;
 #endif
 
+        printk("Clocks: ARM_SYSST: 0x%04x DPLL_CTL: 0x%04x ARM_CKCTL: 0x%04x\n",
+               omap_readw(ARM_SYSST), omap_readw(DPLL_CTL),
+               omap_readw(ARM_CKCTL));
+
         /* We want to be in syncronous scalable mode */
         omap_writew(0x1000, ARM_SYSST);
 
+#ifdef CONFIG_OMAP_CLOCKS_SET_BY_BOOTLOADER
+        /* Use values set by bootloader. Determine PLL rate and recalculate
+         * dependent clocks as if kernel had changed PLL or divisors.
+         */
+        {
+                unsigned pll_ctl_val = omap_readw(DPLL_CTL);
+
+                ck_dpll1.rate = ck_ref.rate; /* Base xtal rate */
+                if (pll_ctl_val & 0x10) {
+                        /* PLL enabled, apply multiplier and divisor */
+                        if (pll_ctl_val & 0xf80)
+                                ck_dpll1.rate *= (pll_ctl_val & 0xf80) >> 7;
+                        ck_dpll1.rate /= ((pll_ctl_val & 0x60) >> 5) + 1;
+                } else {
+                        /* PLL disabled, apply bypass divisor */
+                        switch (pll_ctl_val & 0xc) {
+                        case 0:
+                                break;
+                        case 0x4:
+                                ck_dpll1.rate /= 2;
+                                break;
+                        default:
+                                ck_dpll1.rate /= 4;
+                                break;
+                        }
+                }
+        }
+        propagate_rate(&ck_dpll1);
+#else
         /* Find the highest supported frequency and enable it */
         if (select_table_rate(&virtual_ck_mpu, ~0)) {
                 printk(KERN_ERR "System frequencies not set. Check your config.\n");
@@ -1034,12 +1220,13 @@ int __init clk_init(void)
                 omap_writew(0x1005, ARM_CKCTL);
                 ck_dpll1.rate = 60000000;
                 propagate_rate(&ck_dpll1);
-                printk(KERN_INFO "Clocking rate (xtal/DPLL1/MPU): %ld/%ld/%ld\n",
-                       ck_ref.rate, ck_dpll1.rate, arm_ck.rate);
         }
-
+#endif
         /* Cache rates for clocks connected to ck_ref (not dpll1) */
         propagate_rate(&ck_ref);
+        printk(KERN_INFO "Clocking rate (xtal/DPLL1/MPU): %ld.%01ld/%ld/%ld MHz\n",
+               ck_ref.rate / 1000000, (ck_ref.rate / 100000) % 10,
+               ck_dpll1.rate, arm_ck.rate);
 
 #ifdef CONFIG_MACH_OMAP_PERSEUS2
         /* Select slicer output as OMAP input clock */
@@ -1074,3 +1261,63 @@ int __init clk_init(void)
 
         return 0;
 }
+
+
+#ifdef CONFIG_OMAP_RESET_CLOCKS
+
+static int __init omap_late_clk_reset(void)
+{
+        /* Turn off all unused clocks */
+        struct clk *p;
+        __u32 regval32;
+
+        omap_writew(0, SOFT_REQ_REG);
+        omap_writew(0, SOFT_REQ_REG2);
+
+        list_for_each_entry(p, &clocks, node) {
+                if (p->usecount > 0 || (p->flags & ALWAYS_ENABLED) ||
+                        p->enable_reg == 0)
+                        continue;
+
+                /* Assume no DSP clocks have been activated by bootloader */
+                if (p->flags & DSP_DOMAIN_CLOCK)
+                        continue;
+
+                /* Is the clock already disabled? */
+                if (p->flags & ENABLE_REG_32BIT) {
+                        if (p->flags & VIRTUAL_IO_ADDRESS)
+                                regval32 = __raw_readl(p->enable_reg);
+                        else
+                                regval32 = omap_readl(p->enable_reg);
+                } else {
+                        if (p->flags & VIRTUAL_IO_ADDRESS)
+                                regval32 = __raw_readw(p->enable_reg);
+                        else
+                                regval32 = omap_readw(p->enable_reg);
+                }
+
+                if ((regval32 & (1 << p->enable_bit)) == 0)
+                        continue;
+
+                /* FIXME: This clock seems to be necessary but no-one
+                 * has asked for its activation. */
+                if (p == &tc2_ck         // FIX: pm.c (SRAM), CCP, Camera
+                    || p == &ck_dpll1out // FIX: SoSSI, SSR
+                    || p == &arm_gpio_ck // FIX: GPIO code for 1510
+                    ) {
+                        printk(KERN_INFO "FIXME: Clock \"%s\" seems unused\n",
+                               p->name);
+                        continue;
+                }
+
+                printk(KERN_INFO "Disabling unused clock \"%s\"... ", p->name);
+                __clk_disable(p);
+                printk(" done\n");
+        }
+
+        return 0;
+}
+
+late_initcall(omap_late_clk_reset);
+
+#endif
diff --git a/arch/arm/plat-omap/clock.h b/arch/arm/plat-omap/clock.h
index 08b504deb1a..a89e1e8c251 100644
--- a/arch/arm/plat-omap/clock.h
+++ b/arch/arm/plat-omap/clock.h
@@ -52,6 +52,8 @@ struct mpu_rate {
 #define CLOCK_IN_OMAP16XX       64
 #define CLOCK_IN_OMAP1510       128
 #define CLOCK_IN_OMAP730        256
+#define DSP_DOMAIN_CLOCK        512
+#define VIRTUAL_IO_ADDRESS      1024
 
 /* ARM_CKCTL bit shifts */
 #define CKCTL_PERDIV_OFFSET     0
@@ -63,6 +65,8 @@ struct mpu_rate {
 /*#define ARM_TIMXO             12*/
 #define EN_DSPCK                13
 /*#define ARM_INTHCK_SEL        14*/ /* Divide-by-2 for mpu inth_ck */
+/* DSP_CKCTL bit shifts */
+#define CKCTL_DSPPERDIV_OFFSET  0
 
 /* ARM_IDLECT1 bit shifts */
 /*#define IDLWDT_ARM    0*/
@@ -96,6 +100,9 @@ struct mpu_rate {
 #define EN_TC1_CK       2
 #define EN_TC2_CK       4
 
+/* DSP_IDLECT2 bit shifts (0,1,2 are same as for ARM_IDLECT2) */
+#define EN_DSPTIMCK     5
+
 /* Various register defines for clock controls scattered around OMAP chip */
 #define USB_MCLK_EN_BIT         4       /* In ULPD_CLKC_CTRL */
 #define USB_HOST_HHC_UHOST_EN   9       /* In MOD_CONF_CTRL_0 */
@@ -103,7 +110,8 @@ struct mpu_rate {
 #define COM_ULPD_PLL_CLK_REQ    1       /* In COM_CLK_DIV_CTRL_SEL */
 #define SWD_CLK_DIV_CTRL_SEL    0xfffe0874
 #define COM_CLK_DIV_CTRL_SEL    0xfffe0878
-
+#define SOFT_REQ_REG            0xfffe0834
+#define SOFT_REQ_REG2           0xfffe0880
 
 int clk_register(struct clk *clk);
 void clk_unregister(struct clk *clk);
diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index 015bd2cf869..c0a5c2fa42b 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -794,10 +794,6 @@ static void set_b1_regs(void)
         w = omap_readw(OMAP1610_DMA_LCD_CTRL);
         /* Always set the source port as SDRAM for now*/
         w &= ~(0x03 << 6);
-        if (lcd_dma.ext_ctrl)
-                w |= 1 << 8;
-        else
-                w &= ~(1 << 8);
         if (lcd_dma.callback != NULL)
                 w |= 1 << 1;            /* Block interrupt enable */
         else
@@ -889,9 +885,15 @@ void omap_enable_lcd_dma(void)
          */
         if (enable_1510_mode || !lcd_dma.ext_ctrl)
                 return;
+
+        w = omap_readw(OMAP1610_DMA_LCD_CTRL);
+        w |= 1 << 8;
+        omap_writew(w, OMAP1610_DMA_LCD_CTRL);
+
         w = omap_readw(OMAP1610_DMA_LCD_CCR);
         w |= 1 << 7;
         omap_writew(w, OMAP1610_DMA_LCD_CCR);
+
         lcd_dma.active = 1;
 }
 
@@ -922,10 +924,19 @@ void omap_setup_lcd_dma(void)
 
 void omap_stop_lcd_dma(void)
 {
+        u16 w;
+
         lcd_dma.active = 0;
-        if (!enable_1510_mode && lcd_dma.ext_ctrl)
-                omap_writew(omap_readw(OMAP1610_DMA_LCD_CCR) & ~(1 << 7),
-                            OMAP1610_DMA_LCD_CCR);
+        if (enable_1510_mode || !lcd_dma.ext_ctrl)
+                return;
+
+        w = omap_readw(OMAP1610_DMA_LCD_CCR);
+        w &= ~(1 << 7);
+        omap_writew(w, OMAP1610_DMA_LCD_CCR);
+
+        w = omap_readw(OMAP1610_DMA_LCD_CTRL);
+        w &= ~(1 << 8);
+        omap_writew(w, OMAP1610_DMA_LCD_CTRL);
 }
 
 /*
@@ -972,6 +983,25 @@ dma_addr_t omap_get_dma_dst_pos(int lch)
                              (OMAP_DMA_CDSA_U(lch) << 16));
 }
 
+int omap_dma_running(void)
+{
+        int lch;
+
+        /* Check if LCD DMA is running */
+        if (cpu_is_omap16xx())
+                if (omap_readw(OMAP1610_DMA_LCD_CCR) & OMAP_DMA_CCR_EN)
+                        return 1;
+
+        for (lch = 0; lch < dma_chan_count; lch++) {
+                u16 w;
+
+                w = omap_readw(OMAP_DMA_CCR(lch));
+                if (w & OMAP_DMA_CCR_EN)
+                        return 1;
+        }
+        return 0;
+}
+
 static int __init omap_init_dma(void)
 {
         int ch, r;
diff --git a/arch/arm/plat-omap/mcbsp.c b/arch/arm/plat-omap/mcbsp.c
index 10c3f22f9c6..43567d5eddd 100644
--- a/arch/arm/plat-omap/mcbsp.c
+++ b/arch/arm/plat-omap/mcbsp.c
@@ -66,6 +66,7 @@ struct omap_mcbsp {
 static struct omap_mcbsp mcbsp[OMAP_MAX_MCBSP_COUNT];
 static struct clk *mcbsp_dsp_ck = 0;
 static struct clk *mcbsp_api_ck = 0;
+static struct clk *mcbsp_dspxor_ck = 0;
 
 
 static void omap_mcbsp_dump_reg(u8 id)
@@ -175,7 +176,7 @@ static int omap_mcbsp_check(unsigned int id)
                 return 0;
         }
 
-        if (cpu_is_omap1510() || cpu_is_omap1610() || cpu_is_omap1710()) {
+        if (cpu_is_omap1510() || cpu_is_omap16xx()) {
                 if (id > OMAP_MAX_MCBSP_COUNT) {
                         printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n", id + 1);
                         return -1;
@@ -191,15 +192,12 @@ static int omap_mcbsp_check(unsigned int id)
 
 static void omap_mcbsp_dsp_request(void)
 {
-        if (cpu_is_omap1510() || cpu_is_omap1610() || cpu_is_omap1710()) {
-                omap_writew((omap_readw(ARM_RSTCT1) | (1 << 1) | (1 << 2)),
-                            ARM_RSTCT1);
-                clk_enable(mcbsp_dsp_ck);
-                clk_enable(mcbsp_api_ck);
+        if (cpu_is_omap1510() || cpu_is_omap16xx()) {
+                clk_use(mcbsp_dsp_ck);
+                clk_use(mcbsp_api_ck);
 
                 /* enable 12MHz clock to mcbsp 1 & 3 */
-                __raw_writew(__raw_readw(DSP_IDLECT2) | (1 << EN_XORPCK),
-                             DSP_IDLECT2);
+                clk_use(mcbsp_dspxor_ck);
                 __raw_writew(__raw_readw(DSP_RSTCT2) | 1 | 1 << 1,
                              DSP_RSTCT2);
         }
@@ -207,10 +205,13 @@ static void omap_mcbsp_dsp_request(void)
 
 static void omap_mcbsp_dsp_free(void)
 {
-        /* Useless for now */
+        if (cpu_is_omap1510() || cpu_is_omap16xx()) {
+                clk_unuse(mcbsp_dspxor_ck);
+                clk_unuse(mcbsp_dsp_ck);
+                clk_unuse(mcbsp_api_ck);
+        }
 }
 
-
 int omap_mcbsp_request(unsigned int id)
 {
         int err;
@@ -350,6 +351,73 @@ void omap_mcbsp_stop(unsigned int id)
 }
 
 
+/* polled mcbsp i/o operations */
+int omap_mcbsp_pollwrite(unsigned int id, u16 buf)
+{
+        u32 base = mcbsp[id].io_base;
+        writew(buf, base + OMAP_MCBSP_REG_DXR1);
+        /* if frame sync error - clear the error */
+        if (readw(base + OMAP_MCBSP_REG_SPCR2) & XSYNC_ERR) {
+                /* clear error */
+                writew(readw(base + OMAP_MCBSP_REG_SPCR2) & (~XSYNC_ERR),
+                       base + OMAP_MCBSP_REG_SPCR2);
+                /* resend */
+                return -1;
+        } else {
+                /* wait for transmit confirmation */
+                int attemps = 0;
+                while (!(readw(base + OMAP_MCBSP_REG_SPCR2) & XRDY)) {
+                        if (attemps++ > 1000) {
+                                writew(readw(base + OMAP_MCBSP_REG_SPCR2) &
+                                       (~XRST),
+                                       base + OMAP_MCBSP_REG_SPCR2);
+                                udelay(10);
+                                writew(readw(base + OMAP_MCBSP_REG_SPCR2) |
+                                       (XRST),
+                                       base + OMAP_MCBSP_REG_SPCR2);
+                                udelay(10);
+                                printk(KERN_ERR
+                                       " Could not write to McBSP Register\n");
+                                return -2;
+                        }
+                }
+        }
+        return 0;
+}
+
+int omap_mcbsp_pollread(unsigned int id, u16 * buf)
+{
+        u32 base = mcbsp[id].io_base;
+        /* if frame sync error - clear the error */
+        if (readw(base + OMAP_MCBSP_REG_SPCR1) & RSYNC_ERR) {
+                /* clear error */
+                writew(readw(base + OMAP_MCBSP_REG_SPCR1) & (~RSYNC_ERR),
+                       base + OMAP_MCBSP_REG_SPCR1);
+                /* resend */
+                return -1;
+        } else {
+                /* wait for recieve confirmation */
+                int attemps = 0;
+                while (!(readw(base + OMAP_MCBSP_REG_SPCR1) & RRDY)) {
+                        if (attemps++ > 1000) {
+                                writew(readw(base + OMAP_MCBSP_REG_SPCR1) &
+                                       (~RRST),
+                                       base + OMAP_MCBSP_REG_SPCR1);
+                                udelay(10);
+                                writew(readw(base + OMAP_MCBSP_REG_SPCR1) |
+                                       (RRST),
+                                       base + OMAP_MCBSP_REG_SPCR1);
+                                udelay(10);
+                                printk(KERN_ERR
+                                       " Could not read from McBSP Register\n");
+                                return -2;
+                        }
+                }
+        }
+        *buf = readw(base + OMAP_MCBSP_REG_DRR1);
+        return 0;
+}
+
 /*
  * IRQ based word transmission.
  */
@@ -625,10 +693,15 @@ static int __init omap_mcbsp_init(void)
                 return PTR_ERR(mcbsp_dsp_ck);
         }
         mcbsp_api_ck = clk_get(0, "api_ck");
-        if (IS_ERR(mcbsp_dsp_ck)) {
+        if (IS_ERR(mcbsp_api_ck)) {
                 printk(KERN_ERR "mcbsp: could not acquire api_ck handle.\n");
                 return PTR_ERR(mcbsp_api_ck);
         }
+        mcbsp_dspxor_ck = clk_get(0, "dspxor_ck");
+        if (IS_ERR(mcbsp_dspxor_ck)) {
+                printk(KERN_ERR "mcbsp: could not acquire dspxor_ck handle.\n");
+                return PTR_ERR(mcbsp_dspxor_ck);
+        }
 
 #ifdef CONFIG_ARCH_OMAP730
         if (cpu_is_omap730()) {
@@ -643,7 +716,7 @@ static int __init omap_mcbsp_init(void)
         }
 #endif
 #if defined(CONFIG_ARCH_OMAP16XX)
-        if (cpu_is_omap1610() || cpu_is_omap1710()) {
+        if (cpu_is_omap16xx()) {
                 mcbsp_info = mcbsp_1610;
                 mcbsp_count = ARRAY_SIZE(mcbsp_1610);
         }
diff --git a/arch/arm/plat-omap/mux.c b/arch/arm/plat-omap/mux.c
index cbecd10d0b6..ea7b955b9c8 100644
--- a/arch/arm/plat-omap/mux.c
+++ b/arch/arm/plat-omap/mux.c
@@ -53,19 +53,13 @@ omap_cfg_reg(const reg_cfg_t reg_cfg)
                 return -EINVAL;
         }
 
-        cfg = &reg_cfg_table[reg_cfg];
-
-        /*
-         * We do a pretty long section here with lock on, but pin muxing
-         * should only happen on driver init for each driver, so it's not time
-         * critical.
-         */
-        spin_lock_irqsave(&mux_spin_lock, flags);
+        cfg = (reg_cfg_set *)&reg_cfg_table[reg_cfg];
 
         /* Check the mux register in question */
         if (cfg->mux_reg) {
                 unsigned        tmp1, tmp2;
 
+                spin_lock_irqsave(&mux_spin_lock, flags);
                 reg_orig = omap_readl(cfg->mux_reg);
 
                 /* The mux registers always seem to be 3 bits long */
@@ -80,11 +74,13 @@ omap_cfg_reg(const reg_cfg_t reg_cfg)
                         warn = 1;
 
                 omap_writel(reg, cfg->mux_reg);
+                spin_unlock_irqrestore(&mux_spin_lock, flags);
         }
 
         /* Check for pull up or pull down selection on 1610 */
         if (!cpu_is_omap1510()) {
                 if (cfg->pu_pd_reg && cfg->pull_val) {
+                        spin_lock_irqsave(&mux_spin_lock, flags);
                         pu_pd_orig = omap_readl(cfg->pu_pd_reg);
                         mask = 1 << cfg->pull_bit;
 
@@ -100,11 +96,13 @@ omap_cfg_reg(const reg_cfg_t reg_cfg)
                                 pu_pd = pu_pd_orig & ~mask;
                         }
                         omap_writel(pu_pd, cfg->pu_pd_reg);
+                        spin_unlock_irqrestore(&mux_spin_lock, flags);
                 }
         }
 
         /* Check for an associated pull down register */
         if (cfg->pull_reg) {
+                spin_lock_irqsave(&mux_spin_lock, flags);
                 pull_orig = omap_readl(cfg->pull_reg);
                 mask = 1 << cfg->pull_bit;
 
@@ -121,6 +119,7 @@ omap_cfg_reg(const reg_cfg_t reg_cfg)
                 }
 
                 omap_writel(pull, cfg->pull_reg);
+                spin_unlock_irqrestore(&mux_spin_lock, flags);
         }
 
         if (warn) {
@@ -149,8 +148,6 @@ omap_cfg_reg(const reg_cfg_t reg_cfg)
         }
 #endif
 
-        spin_unlock_irqrestore(&mux_spin_lock, flags);
-
 #ifdef CONFIG_OMAP_MUX_ERRORS
         return warn ? -ETXTBSY : 0;
 #else
diff --git a/arch/arm/plat-omap/usb.c b/arch/arm/plat-omap/usb.c
index ab38e4eb313..25bc4a8dd76 100644
--- a/arch/arm/plat-omap/usb.c
+++ b/arch/arm/plat-omap/usb.c
@@ -326,7 +326,7 @@ static u64 ohci_dmamask = ~(u32)0;
 static struct resource ohci_resources[] = {
         {
                 .start  = OMAP_OHCI_BASE,
-                .end    = OMAP_OHCI_BASE + 4096,
+                .end    = OMAP_OHCI_BASE + 4096 - 1,
                 .flags  = IORESOURCE_MEM,
         },
         {