Merge branch 'mxs/clk' of git://git.linaro.org/people/shawnguo/linux-2.6 into next/soc

* 'mxs/clk' of git://git.linaro.org/people/shawnguo/linux-2.6:
  ARM: mxs: Use a proper timeout mechanism
  ARM: mx28: check for gated clocks when setting saif divider
  arm/mxs: Add support for SSP/MMC ports 2 & 3

arch/arm/mach-mxs/clock-mx23.c

@@ -223,7 +223,6 @@ static int cpu_clk_set_rate(struct clk *clk, unsigned long rate)
 {
 	u32 reg, bm_busy, div_max, d, f, div, frac;
 	unsigned long diff, parent_rate, calc_rate;
-	int i;
 
 	parent_rate = clk_get_rate(clk->parent);
 
@@ -275,14 +274,7 @@ static int cpu_clk_set_rate(struct clk *clk, unsigned long rate)
 	reg |= div << BP_CLKCTRL_CPU_DIV_CPU;
 	__raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_CPU);
 
-	for (i = 10000; i; i--)
+	mxs_clkctrl_timeout(HW_CLKCTRL_CPU, bm_busy);
-		if (!(__raw_readl(CLKCTRL_BASE_ADDR +
-					HW_CLKCTRL_CPU) & bm_busy))
-			break;
-	if (!i)	{
-		pr_err("%s: divider writing timeout\n", __func__);
-		return -ETIMEDOUT;
-	}
 
 	return 0;
 }
@@ -292,7 +284,6 @@ static int name##_set_rate(struct clk *clk, unsigned long rate)		\
 {									\
 	u32 reg, div_max, div;						\
 	unsigned long parent_rate;					\
-	int i;								\
 									\
 	parent_rate = clk_get_rate(clk->parent);			\
 	div_max = BM_CLKCTRL_##dr##_DIV >> BP_CLKCTRL_##dr##_DIV;	\
@@ -310,15 +301,7 @@ static int name##_set_rate(struct clk *clk, unsigned long rate)		\
 	}								\
 	__raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_##dr);		\
 									\
-	for (i = 10000; i; i--)						\
+	mxs_clkctrl_timeout(HW_CLKCTRL_##dr, BM_CLKCTRL_##dr##_BUSY);	\
-		if (!(__raw_readl(CLKCTRL_BASE_ADDR +			\
-			HW_CLKCTRL_##dr) & BM_CLKCTRL_##dr##_BUSY))	\
-			break;						\
-	if (!i)	{							\
-		pr_err("%s: divider writing timeout\n", __func__);	\
-		return -ETIMEDOUT;					\
-	}								\
-									\
 	return 0;							\
 }
 
@@ -461,7 +444,7 @@ static struct clk_lookup lookups[] = {
 static int clk_misc_init(void)
 {
 	u32 reg;
-	int i;
+	int ret;
 
 	/* Fix up parent per register setting */
 	reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_CLKSEQ);
@@ -510,14 +493,7 @@ static int clk_misc_init(void)
 	reg |= 3 << BP_CLKCTRL_HBUS_DIV;
 	__raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_HBUS);
 
-	for (i = 10000; i; i--)
+	ret = mxs_clkctrl_timeout(HW_CLKCTRL_HBUS, BM_CLKCTRL_HBUS_BUSY);
-		if (!(__raw_readl(CLKCTRL_BASE_ADDR +
-			HW_CLKCTRL_HBUS) & BM_CLKCTRL_HBUS_BUSY))
-			break;
-	if (!i) {
-		pr_err("%s: divider writing timeout\n", __func__);
-		return -ETIMEDOUT;
-	}
 
 	/* Gate off cpu clock in WFI for power saving */
 	__raw_writel(BM_CLKCTRL_CPU_INTERRUPT_WAIT,
@@ -532,7 +508,7 @@ static int clk_misc_init(void)
 	reg |= 30 << BP_CLKCTRL_FRAC_IOFRAC;
 	__raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_FRAC);
 
-	return 0;
+	return ret;
 }
 
 int __init mx23_clocks_init(void)

arch/arm/mach-mxs/clock-mx28.c

@@ -322,7 +322,6 @@ static int name##_set_rate(struct clk *clk, unsigned long rate)		\
 {									\
 	u32 reg, bm_busy, div_max, d, f, div, frac;			\
 	unsigned long diff, parent_rate, calc_rate;			\
-	int i;								\
 									\
 	div_max = BM_CLKCTRL_##dr##_DIV >> BP_CLKCTRL_##dr##_DIV;	\
 	bm_busy = BM_CLKCTRL_##dr##_BUSY;				\
@@ -396,16 +395,7 @@ static int name##_set_rate(struct clk *clk, unsigned long rate)		\
 	}								\
 	__raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_##dr);		\
 									\
-	for (i = 10000; i; i--)						\
+	return mxs_clkctrl_timeout(HW_CLKCTRL_##dr, bm_busy);		\
-		if (!(__raw_readl(CLKCTRL_BASE_ADDR +			\
-			HW_CLKCTRL_##dr) & bm_busy))			\
-			break;						\
-	if (!i)	{							\
-		pr_err("%s: divider writing timeout\n", __func__);	\
-		return -ETIMEDOUT;					\
-	}								\
-									\
-	return 0;							\
 }
 
 _CLK_SET_RATE(cpu_clk, CPU, FRAC0, CPU)
@@ -421,7 +411,6 @@ static int name##_set_rate(struct clk *clk, unsigned long rate)		\
 {									\
 	u32 reg, div_max, div;						\
 	unsigned long parent_rate;					\
-	int i;								\
 									\
 	parent_rate = clk_get_rate(clk->parent);			\
 	div_max = BM_CLKCTRL_##dr##_DIV >> BP_CLKCTRL_##dr##_DIV;	\
@@ -439,16 +428,7 @@ static int name##_set_rate(struct clk *clk, unsigned long rate)		\
 	}								\
 	__raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_##dr);		\
 									\
-	for (i = 10000; i; i--)						\
+	return mxs_clkctrl_timeout(HW_CLKCTRL_##dr, BM_CLKCTRL_##dr##_BUSY);\
-		if (!(__raw_readl(CLKCTRL_BASE_ADDR +			\
-			HW_CLKCTRL_##dr) & BM_CLKCTRL_##dr##_BUSY))	\
-			break;						\
-	if (!i)	{							\
-		pr_err("%s: divider writing timeout\n", __func__);	\
-		return -ETIMEDOUT;					\
-	}								\
-									\
-	return 0;							\
 }
 
 _CLK_SET_RATE1(xbus_clk, XBUS)
@@ -461,7 +441,6 @@ static int name##_set_rate(struct clk *clk, unsigned long rate)		\
 	u32 reg;							\
 	u64 lrate;							\
 	unsigned long parent_rate;					\
-	int i;								\
 									\
 	parent_rate = clk_get_rate(clk->parent);			\
 	if (rate > parent_rate)						\
@@ -477,18 +456,13 @@ static int name##_set_rate(struct clk *clk, unsigned long rate)		\
 	reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_##rs);		\
 	reg &= ~BM_CLKCTRL_##rs##_DIV;					\
 	reg |= div << BP_CLKCTRL_##rs##_DIV;				\
+	if (reg & (1 << clk->enable_shift)) {				\
+		pr_err("%s: clock is gated\n", __func__);		\
+		return -EINVAL;						\
+	}								\
 	__raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_##rs);		\
 									\
-	for (i = 10000; i; i--)						\
+	return mxs_clkctrl_timeout(HW_CLKCTRL_##rs, BM_CLKCTRL_##rs##_BUSY);\
-		if (!(__raw_readl(CLKCTRL_BASE_ADDR +			\
-			HW_CLKCTRL_##rs) & BM_CLKCTRL_##rs##_BUSY))	\
-			break;						\
-	if (!i) {							\
-		pr_err("%s: divider writing timeout\n", __func__);	\
-		return -ETIMEDOUT;					\
-	}								\
-									\
-	return 0;							\
 }
 
 _CLK_SET_RATE_SAIF(saif0_clk, SAIF0)
@@ -654,6 +628,8 @@ static struct clk_lookup lookups[] = {
 	_REGISTER_CLOCK("mxs-dma-apbx", NULL, xbus_clk)
 	_REGISTER_CLOCK("mxs-mmc.0", NULL, ssp0_clk)
 	_REGISTER_CLOCK("mxs-mmc.1", NULL, ssp1_clk)
+	_REGISTER_CLOCK("mxs-mmc.2", NULL, ssp2_clk)
+	_REGISTER_CLOCK("mxs-mmc.3", NULL, ssp3_clk)
 	_REGISTER_CLOCK("flexcan.0", NULL, can0_clk)
 	_REGISTER_CLOCK("flexcan.1", NULL, can1_clk)
 	_REGISTER_CLOCK(NULL, "usb0", usb0_clk)
@@ -676,7 +652,7 @@ static struct clk_lookup lookups[] = {
 static int clk_misc_init(void)
 {
 	u32 reg;
-	int i;
+	int ret;
 
 	/* Fix up parent per register setting */
 	reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_CLKSEQ);
@@ -756,14 +732,7 @@ static int clk_misc_init(void)
 	reg |= 3 << BP_CLKCTRL_HBUS_DIV;
 	__raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_HBUS);
 
-	for (i = 10000; i; i--)
+	ret = mxs_clkctrl_timeout(HW_CLKCTRL_HBUS, BM_CLKCTRL_HBUS_ASM_BUSY);
-		if (!(__raw_readl(CLKCTRL_BASE_ADDR +
-			HW_CLKCTRL_HBUS) & BM_CLKCTRL_HBUS_ASM_BUSY))
-			break;
-	if (!i) {
-		pr_err("%s: divider writing timeout\n", __func__);
-		return -ETIMEDOUT;
-	}
 
 	/* Gate off cpu clock in WFI for power saving */
 	__raw_writel(BM_CLKCTRL_CPU_INTERRUPT_WAIT,
@@ -790,7 +759,7 @@ static int clk_misc_init(void)
 	reg |= 30 << BP_CLKCTRL_FRAC0_IO0FRAC;
 	__raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_FRAC0);
 
-	return 0;
+	return ret;
 }
 
 int __init mx28_clocks_init(void)
@@ -803,6 +772,8 @@ int __init mx28_clocks_init(void)
 	 */
 	clk_set_parent(&ssp0_clk, &ref_io0_clk);
 	clk_set_parent(&ssp1_clk, &ref_io0_clk);
+	clk_set_parent(&ssp2_clk, &ref_io1_clk);
+	clk_set_parent(&ssp3_clk, &ref_io1_clk);
 
 	clk_prepare_enable(&cpu_clk);
 	clk_prepare_enable(&hbus_clk);

arch/arm/mach-mxs/devices/platform-mxs-mmc.c

@@ -41,6 +41,8 @@ const struct mxs_mxs_mmc_data mx23_mxs_mmc_data[] __initconst = {
 const struct mxs_mxs_mmc_data mx28_mxs_mmc_data[] __initconst = {
 	mxs_mxs_mmc_data_entry(MX28, 0, 0),
 	mxs_mxs_mmc_data_entry(MX28, 1, 1),
+	mxs_mxs_mmc_data_entry(MX28, 2, 2),
+	mxs_mxs_mmc_data_entry(MX28, 3, 3),
 };
 #endif
 

arch/arm/mach-mxs/include/mach/common.h

@@ -31,4 +31,6 @@ extern void mx28_init_irq(void);
 
 extern void icoll_init_irq(void);
 
+extern int mxs_clkctrl_timeout(unsigned int reg_offset, unsigned int mask);
+
 #endif /* __MACH_MXS_COMMON_H__ */

arch/arm/mach-mxs/system.c

@@ -37,6 +37,8 @@
 #define MXS_MODULE_CLKGATE		(1 << 30)
 #define MXS_MODULE_SFTRST		(1 << 31)
 
+#define CLKCTRL_TIMEOUT		10	/* 10 ms */
+
 static void __iomem *mxs_clkctrl_reset_addr;
 
 /*
@@ -137,3 +139,17 @@ error:
 	return -ETIMEDOUT;
 }
 EXPORT_SYMBOL(mxs_reset_block);
+
+int mxs_clkctrl_timeout(unsigned int reg_offset, unsigned int mask)
+{
+	unsigned long timeout = jiffies + msecs_to_jiffies(CLKCTRL_TIMEOUT);
+	while (readl_relaxed(MXS_IO_ADDRESS(MXS_CLKCTRL_BASE_ADDR)
+						+ reg_offset) & mask) {
+		if (time_after(jiffies, timeout)) {
+			pr_err("Timeout at CLKCTRL + 0x%x\n", reg_offset);
+			return -ETIMEDOUT;
+		}
+	}
+
+	return 0;
+}