4 files changed, 53 insertions, 117 deletions

diff --git a/arch/arm/plat-omap/cpu-omap.c b/arch/arm/plat-omap/cpu-omap.c
index c0d63b0c61c9..d719c15daa55 100644
--- a/arch/arm/plat-omap/cpu-omap.c
+++ b/arch/arm/plat-omap/cpu-omap.c
@@ -33,43 +33,33 @@
 #define MPU_CLK         "virt_prcm_set"
 #endif
 
+static struct clk *mpu_clk;
+
 /* TODO: Add support for SDRAM timing changes */
 
 int omap_verify_speed(struct cpufreq_policy *policy)
 {
-        struct clk * mpu_clk;
-
         if (policy->cpu)
                 return -EINVAL;
 
         cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
                                      policy->cpuinfo.max_freq);
-        mpu_clk = clk_get(NULL, MPU_CLK);
-        if (IS_ERR(mpu_clk))
-                return PTR_ERR(mpu_clk);
+
         policy->min = clk_round_rate(mpu_clk, policy->min * 1000) / 1000;
         policy->max = clk_round_rate(mpu_clk, policy->max * 1000) / 1000;
         cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
                                      policy->cpuinfo.max_freq);
-        clk_put(mpu_clk);
-
         return 0;
 }
 
 unsigned int omap_getspeed(unsigned int cpu)
 {
-        struct clk * mpu_clk;
         unsigned long rate;
 
         if (cpu)
                 return 0;
 
-        mpu_clk = clk_get(NULL, MPU_CLK);
-        if (IS_ERR(mpu_clk))
-                return 0;
         rate = clk_get_rate(mpu_clk) / 1000;
-        clk_put(mpu_clk);
-
         return rate;
 }
 
@@ -77,14 +67,9 @@ static int omap_target(struct cpufreq_policy *policy,
                        unsigned int target_freq,
                        unsigned int relation)
 {
-        struct clk * mpu_clk;
         struct cpufreq_freqs freqs;
         int ret = 0;
 
-        mpu_clk = clk_get(NULL, MPU_CLK);
-        if (IS_ERR(mpu_clk))
-                return PTR_ERR(mpu_clk);
-
         freqs.old = omap_getspeed(0);
         freqs.new = clk_round_rate(mpu_clk, target_freq * 1000) / 1000;
         freqs.cpu = 0;
@@ -92,15 +77,12 @@ static int omap_target(struct cpufreq_policy *policy,
         cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
         ret = clk_set_rate(mpu_clk, target_freq * 1000);
         cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
-        clk_put(mpu_clk);
 
         return ret;
 }
 
 static int __init omap_cpu_init(struct cpufreq_policy *policy)
 {
-        struct clk * mpu_clk;
-
         mpu_clk = clk_get(NULL, MPU_CLK);
         if (IS_ERR(mpu_clk))
                 return PTR_ERR(mpu_clk);
@@ -111,17 +93,23 @@ static int __init omap_cpu_init(struct cpufreq_policy *policy)
         policy->cpuinfo.min_freq = clk_round_rate(mpu_clk, 0) / 1000;
         policy->cpuinfo.max_freq = clk_round_rate(mpu_clk, VERY_HI_RATE) / 1000;
         policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
-        clk_put(mpu_clk);
 
         return 0;
 }
 
+static int omap_cpu_exit(struct cpufreq_policy *policy)
+{
+        clk_put(mpu_clk);
+        return 0;
+}
+
 static struct cpufreq_driver omap_driver = {
         .flags          = CPUFREQ_STICKY,
         .verify         = omap_verify_speed,
         .target         = omap_target,
         .get            = omap_getspeed,
         .init           = omap_cpu_init,
+        .exit           = omap_cpu_exit,
         .name           = "omap",
 };
 
diff --git a/arch/arm/plat-omap/devices.c b/arch/arm/plat-omap/devices.c
index c5dab1d6417e..4a53f9ba6c43 100644
--- a/arch/arm/plat-omap/devices.c
+++ b/arch/arm/plat-omap/devices.c
@@ -89,68 +89,6 @@ static inline void omap_init_dsp(void) { }
 #endif  /* CONFIG_OMAP_DSP */
 
 /*-------------------------------------------------------------------------*/
-#if     defined(CONFIG_I2C_OMAP) || defined(CONFIG_I2C_OMAP_MODULE)
-
-#define OMAP1_I2C_BASE          0xfffb3800
-#define OMAP2_I2C_BASE1         0x48070000
-#define OMAP_I2C_SIZE           0x3f
-#define OMAP1_I2C_INT           INT_I2C
-#define OMAP2_I2C_INT1          56
-
-static struct resource i2c_resources1[] = {
-        {
-                .start          = 0,
-                .end            = 0,
-                .flags          = IORESOURCE_MEM,
-        },
-        {
-                .start          = 0,
-                .flags          = IORESOURCE_IRQ,
-        },
-};
-
-/* DMA not used; works around erratum writing to non-empty i2c fifo */
-
-static struct platform_device omap_i2c_device1 = {
-        .name           = "i2c_omap",
-        .id             = 1,
-        .num_resources  = ARRAY_SIZE(i2c_resources1),
-        .resource       = i2c_resources1,
-};
-
-/* See also arch/arm/mach-omap2/devices.c for second I2C on 24xx */
-static void omap_init_i2c(void)
-{
-        if (cpu_is_omap24xx()) {
-                i2c_resources1[0].start = OMAP2_I2C_BASE1;
-                i2c_resources1[0].end = OMAP2_I2C_BASE1 + OMAP_I2C_SIZE;
-                i2c_resources1[1].start = OMAP2_I2C_INT1;
-        } else {
-                i2c_resources1[0].start = OMAP1_I2C_BASE;
-                i2c_resources1[0].end = OMAP1_I2C_BASE + OMAP_I2C_SIZE;
-                i2c_resources1[1].start = OMAP1_I2C_INT;
-        }
-
-        /* FIXME define and use a boot tag, in case of boards that
-         * either don't wire up I2C, or chips that mux it differently...
-         * it can include clocking and address info, maybe more.
-         */
-        if (cpu_is_omap24xx()) {
-                omap_cfg_reg(M19_24XX_I2C1_SCL);
-                omap_cfg_reg(L15_24XX_I2C1_SDA);
-        } else {
-                omap_cfg_reg(I2C_SCL);
-                omap_cfg_reg(I2C_SDA);
-        }
-
-        (void) platform_device_register(&omap_i2c_device1);
-}
-
-#else
-static inline void omap_init_i2c(void) {}
-#endif
-
-/*-------------------------------------------------------------------------*/
 #if     defined(CONFIG_KEYBOARD_OMAP) || defined(CONFIG_KEYBOARD_OMAP_MODULE)
 
 static void omap_init_kp(void)
@@ -501,7 +439,6 @@ static int __init omap_init_devices(void)
          * in alphabetical order so they're easier to sort through.
          */
         omap_init_dsp();
-        omap_init_i2c();
         omap_init_kp();
         omap_init_mmc();
         omap_init_uwire();
diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index 9255a4598c71..91004a3c4794 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -1705,14 +1705,8 @@ static int omap2_dma_handle_ch(int ch)
                 status = OMAP_DMA_CSR_REG(ch);
         }
 
-        if (likely(dma_chan[ch].callback != NULL)) {
-                if (dma_chan[ch].chain_id != -1)
-                        dma_chan[ch].callback(dma_chan[ch].chain_id, status,
-                                              dma_chan[ch].data);
-                else
-                        dma_chan[ch].callback(ch, status, dma_chan[ch].data);
-
-        }
+        if (likely(dma_chan[ch].callback != NULL))
+                dma_chan[ch].callback(ch, status, dma_chan[ch].data);
 
         OMAP_DMA_CSR_REG(ch) = status;
 
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index 56f4d1394d56..66a1455595f4 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -333,13 +333,14 @@ static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input)
 void omap_set_gpio_direction(int gpio, int is_input)
 {
         struct gpio_bank *bank;
+        unsigned long flags;
 
         if (check_gpio(gpio) < 0)
                 return;
         bank = get_gpio_bank(gpio);
-        spin_lock(&bank->lock);
+        spin_lock_irqsave(&bank->lock, flags);
         _set_gpio_direction(bank, get_gpio_index(gpio), is_input);
-        spin_unlock(&bank->lock);
+        spin_unlock_irqrestore(&bank->lock, flags);
 }
 
 static void _set_gpio_dataout(struct gpio_bank *bank, int gpio, int enable)
@@ -406,13 +407,14 @@ static void _set_gpio_dataout(struct gpio_bank *bank, int gpio, int enable)
 void omap_set_gpio_dataout(int gpio, int enable)
 {
         struct gpio_bank *bank;
+        unsigned long flags;
 
         if (check_gpio(gpio) < 0)
                 return;
         bank = get_gpio_bank(gpio);
-        spin_lock(&bank->lock);
+        spin_lock_irqsave(&bank->lock, flags);
         _set_gpio_dataout(bank, get_gpio_index(gpio), enable);
-        spin_unlock(&bank->lock);
+        spin_unlock_irqrestore(&bank->lock, flags);
 }
 
 int omap_get_gpio_datain(int gpio)
@@ -624,6 +626,7 @@ static int gpio_irq_type(unsigned irq, unsigned type)
         struct gpio_bank *bank;
         unsigned gpio;
         int retval;
+        unsigned long flags;
 
         if (!cpu_class_is_omap2() && irq > IH_MPUIO_BASE)
                 gpio = OMAP_MPUIO(irq - IH_MPUIO_BASE);
@@ -642,13 +645,13 @@ static int gpio_irq_type(unsigned irq, unsigned type)
                 return -EINVAL;
 
         bank = get_irq_chip_data(irq);
-        spin_lock(&bank->lock);
+        spin_lock_irqsave(&bank->lock, flags);
         retval = _set_gpio_triggering(bank, get_gpio_index(gpio), type);
         if (retval == 0) {
                 irq_desc[irq].status &= ~IRQ_TYPE_SENSE_MASK;
                 irq_desc[irq].status |= type;
         }
-        spin_unlock(&bank->lock);
+        spin_unlock_irqrestore(&bank->lock, flags);
         return retval;
 }
 
@@ -830,11 +833,13 @@ static inline void _set_gpio_irqenable(struct gpio_bank *bank, int gpio, int ena
  */
 static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
 {
+        unsigned long flags;
+
         switch (bank->method) {
 #ifdef CONFIG_ARCH_OMAP16XX
         case METHOD_MPUIO:
         case METHOD_GPIO_1610:
-                spin_lock(&bank->lock);
+                spin_lock_irqsave(&bank->lock, flags);
                 if (enable) {
                         bank->suspend_wakeup |= (1 << gpio);
                         enable_irq_wake(bank->irq);
@@ -842,7 +847,7 @@ static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
                         disable_irq_wake(bank->irq);
                         bank->suspend_wakeup &= ~(1 << gpio);
                 }
-                spin_unlock(&bank->lock);
+                spin_unlock_irqrestore(&bank->lock, flags);
                 return 0;
 #endif
 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
@@ -853,7 +858,7 @@ static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
                                         (bank - gpio_bank) * 32 + gpio);
                         return -EINVAL;
                 }
-                spin_lock(&bank->lock);
+                spin_lock_irqsave(&bank->lock, flags);
                 if (enable) {
                         bank->suspend_wakeup |= (1 << gpio);
                         enable_irq_wake(bank->irq);
@@ -861,7 +866,7 @@ static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
                         disable_irq_wake(bank->irq);
                         bank->suspend_wakeup &= ~(1 << gpio);
                 }
-                spin_unlock(&bank->lock);
+                spin_unlock_irqrestore(&bank->lock, flags);
                 return 0;
 #endif
         default:
@@ -897,16 +902,17 @@ static int gpio_wake_enable(unsigned int irq, unsigned int enable)
 int omap_request_gpio(int gpio)
 {
         struct gpio_bank *bank;
+        unsigned long flags;
 
         if (check_gpio(gpio) < 0)
                 return -EINVAL;
 
         bank = get_gpio_bank(gpio);
-        spin_lock(&bank->lock);
+        spin_lock_irqsave(&bank->lock, flags);
         if (unlikely(bank->reserved_map & (1 << get_gpio_index(gpio)))) {
                 printk(KERN_ERR "omap-gpio: GPIO %d is already reserved!\n", gpio);
                 dump_stack();
-                spin_unlock(&bank->lock);
+                spin_unlock_irqrestore(&bank->lock, flags);
                 return -1;
         }
         bank->reserved_map |= (1 << get_gpio_index(gpio));
@@ -925,7 +931,7 @@ int omap_request_gpio(int gpio)
                 __raw_writel(__raw_readl(reg) | (1 << get_gpio_index(gpio)), reg);
         }
 #endif
-        spin_unlock(&bank->lock);
+        spin_unlock_irqrestore(&bank->lock, flags);
 
         return 0;
 }
@@ -933,15 +939,16 @@ int omap_request_gpio(int gpio)
 void omap_free_gpio(int gpio)
 {
         struct gpio_bank *bank;
+        unsigned long flags;
 
         if (check_gpio(gpio) < 0)
                 return;
         bank = get_gpio_bank(gpio);
-        spin_lock(&bank->lock);
+        spin_lock_irqsave(&bank->lock, flags);
         if (unlikely(!(bank->reserved_map & (1 << get_gpio_index(gpio))))) {
                 printk(KERN_ERR "omap-gpio: GPIO %d wasn't reserved!\n", gpio);
                 dump_stack();
-                spin_unlock(&bank->lock);
+                spin_unlock_irqrestore(&bank->lock, flags);
                 return;
         }
 #ifdef CONFIG_ARCH_OMAP16XX
@@ -960,7 +967,7 @@ void omap_free_gpio(int gpio)
 #endif
         bank->reserved_map &= ~(1 << get_gpio_index(gpio));
         _reset_gpio(bank, gpio);
-        spin_unlock(&bank->lock);
+        spin_unlock_irqrestore(&bank->lock, flags);
 }
 
 /*
@@ -1194,11 +1201,12 @@ static int omap_mpuio_suspend_late(struct platform_device *pdev, pm_message_t me
 {
         struct gpio_bank        *bank = platform_get_drvdata(pdev);
         void __iomem            *mask_reg = bank->base + OMAP_MPUIO_GPIO_MASKIT;
+        unsigned long           flags;
 
-        spin_lock(&bank->lock);
+        spin_lock_irqsave(&bank->lock, flags);
         bank->saved_wakeup = __raw_readl(mask_reg);
         __raw_writel(0xffff & ~bank->suspend_wakeup, mask_reg);
-        spin_unlock(&bank->lock);
+        spin_unlock_irqrestore(&bank->lock, flags);
 
         return 0;
 }
@@ -1207,10 +1215,11 @@ static int omap_mpuio_resume_early(struct platform_device *pdev)
 {
         struct gpio_bank        *bank = platform_get_drvdata(pdev);
         void __iomem            *mask_reg = bank->base + OMAP_MPUIO_GPIO_MASKIT;
+        unsigned long           flags;
 
-        spin_lock(&bank->lock);
+        spin_lock_irqsave(&bank->lock, flags);
         __raw_writel(bank->saved_wakeup, mask_reg);
-        spin_unlock(&bank->lock);
+        spin_unlock_irqrestore(&bank->lock, flags);
 
         return 0;
 }
@@ -1277,6 +1286,11 @@ static struct clk *gpio_fclks[OMAP34XX_NR_GPIOS];
 static struct clk *gpio_iclks[OMAP34XX_NR_GPIOS];
 #endif
 
+/* This lock class tells lockdep that GPIO irqs are in a different
+ * category than their parents, so it won't report false recursion.
+ */
+static struct lock_class_key gpio_lock_class;
+
 static int __init _omap_gpio_init(void)
 {
         int i;
@@ -1450,6 +1464,7 @@ static int __init _omap_gpio_init(void)
 #endif
                 for (j = bank->virtual_irq_start;
                      j < bank->virtual_irq_start + gpio_count; j++) {
+                        lockdep_set_class(&irq_desc[j].lock, &gpio_lock_class);
                         set_irq_chip_data(j, bank);
                         if (bank_is_mpuio(bank))
                                 set_irq_chip(j, &mpuio_irq_chip);
@@ -1489,6 +1504,7 @@ static int omap_gpio_suspend(struct sys_device *dev, pm_message_t mesg)
                 void __iomem *wake_status;
                 void __iomem *wake_clear;
                 void __iomem *wake_set;
+                unsigned long flags;
 
                 switch (bank->method) {
 #ifdef CONFIG_ARCH_OMAP16XX
@@ -1509,11 +1525,11 @@ static int omap_gpio_suspend(struct sys_device *dev, pm_message_t mesg)
                         continue;
                 }
 
-                spin_lock(&bank->lock);
+                spin_lock_irqsave(&bank->lock, flags);
                 bank->saved_wakeup = __raw_readl(wake_status);
                 __raw_writel(0xffffffff, wake_clear);
                 __raw_writel(bank->suspend_wakeup, wake_set);
-                spin_unlock(&bank->lock);
+                spin_unlock_irqrestore(&bank->lock, flags);
         }
 
         return 0;
@@ -1530,6 +1546,7 @@ static int omap_gpio_resume(struct sys_device *dev)
                 struct gpio_bank *bank = &gpio_bank[i];
                 void __iomem *wake_clear;
                 void __iomem *wake_set;
+                unsigned long flags;
 
                 switch (bank->method) {
 #ifdef CONFIG_ARCH_OMAP16XX
@@ -1548,10 +1565,10 @@ static int omap_gpio_resume(struct sys_device *dev)
                         continue;
                 }
 
-                spin_lock(&bank->lock);
+                spin_lock_irqsave(&bank->lock, flags);
                 __raw_writel(0xffffffff, wake_clear);
                 __raw_writel(bank->saved_wakeup, wake_set);
-                spin_unlock(&bank->lock);
+                spin_unlock_irqrestore(&bank->lock, flags);
         }
 
         return 0;