Merge tag 'clk-for-linus' of git://git.linaro.org/people/mturquette/linux

Pull clock framework changes from Mike Turquette:
 "The common clock framework changes for 3.8 are comprised of lots of
  fixes for existing platforms as well as new ports for some ARM
  platforms.  In addition there are new clk drivers for audio devices
  and MFDs."

Fix up trivial conflict in <linux/clk-provider.h> (removal of 'inline'
clashing with return type fixes)

* tag 'clk-for-linus' of git://git.linaro.org/people/mturquette/linux: (51 commits)
  MAINTAINERS: bad email address for Mike Turquette
  clk: introduce optional disable_unused callback
  clk: ux500: fix bit error
  clk: clock multiplexers may register out of order
  clk: ux500: Initial support for abx500 clock driver
  CLK: SPEAr: Remove unused dummy apb_pclk
  CLK: SPEAr: Correct index scanning done for clock synths
  CLK: SPEAr: Update clock rate table
  CLK: SPEAr: Add missing clocks
  CLK: SPEAr: Set CLK_SET_RATE_PARENT for few clocks
  CLK: SPEAr13xx: fix parent names of multiple clocks
  CLK: SPEAr13xx: Fix mux clock names
  CLK: SPEAr: Fix dev_id & con_id for multiple clocks
  clk: move IM-PD1 clocks to drivers/clk
  clk: make ICST driver handle the VCO registers
  clk: add GPLv2 headers to the Versatile clock files
  clk: mxs: Use a better name for the USB PHY clock
  clk: spear: Add stub functions for spear3[0|1|2]0_clk_init()
  CLK: clk-twl6040: fix return value check in twl6040_clk_probe()
  clk: ux500: Register nomadik keypad clock lookups for u8500
  ...

1 files changed, 71 insertions, 15 deletions

diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
index 00b8b0f3dfb..b96661d453a 100644
--- a/drivers/mfd/db8500-prcmu.c
+++ b/drivers/mfd/db8500-prcmu.c
@@ -31,6 +31,7 @@
 #include <linux/mfd/abx500/ab8500.h>
 #include <linux/regulator/db8500-prcmu.h>
 #include <linux/regulator/machine.h>
+#include <linux/cpufreq.h>
 #include <asm/hardware/gic.h>
 #include <mach/hardware.h>
 #include <mach/irqs.h>
@@ -420,9 +421,6 @@ static struct {
 
 static atomic_t ac_wake_req_state = ATOMIC_INIT(0);
 
-/* Functions definition */
-static void compute_armss_rate(void);
-
 /* Spinlocks */
 static DEFINE_SPINLOCK(prcmu_lock);
 static DEFINE_SPINLOCK(clkout_lock);
@@ -1019,7 +1017,6 @@ int db8500_prcmu_set_arm_opp(u8 opp)
 		(mb1_transfer.ack.arm_opp != opp))
 		r = -EIO;
 
-	compute_armss_rate();
 	mutex_unlock(&mb1_transfer.lock);
 
 	return r;
@@ -1169,12 +1166,12 @@ int db8500_prcmu_get_ape_opp(void)
 }
 
 /**
- * prcmu_request_ape_opp_100_voltage - Request APE OPP 100% voltage
+ * db8500_prcmu_request_ape_opp_100_voltage - Request APE OPP 100% voltage
  * @enable: true to request the higher voltage, false to drop a request.
  *
  * Calls to this function to enable and disable requests must be balanced.
  */
-int prcmu_request_ape_opp_100_voltage(bool enable)
+int db8500_prcmu_request_ape_opp_100_voltage(bool enable)
 {
 	int r = 0;
 	u8 header;
@@ -1669,13 +1666,8 @@ static unsigned long clock_rate(u8 clock)
 	else
 		return 0;
 }
-static unsigned long latest_armss_rate;
-static unsigned long armss_rate(void)
-{
-	return latest_armss_rate;
-}
 
-static void compute_armss_rate(void)
+static unsigned long armss_rate(void)
 {
 	u32 r;
 	unsigned long rate;
@@ -1700,7 +1692,7 @@ static void compute_armss_rate(void)
 		rate = pll_rate(PRCM_PLLARM_FREQ, ROOT_CLOCK_RATE, PLL_DIV);
 	}
 
-	latest_armss_rate = rate;
+	return rate;
 }
 
 static unsigned long dsiclk_rate(u8 n)
@@ -1820,6 +1812,35 @@ static long round_clock_rate(u8 clock, unsigned long rate)
 	return rounded_rate;
 }
 
+/* CPU FREQ table, may be changed due to if MAX_OPP is supported. */
+static struct cpufreq_frequency_table db8500_cpufreq_table[] = {
+	{ .frequency = 200000, .index = ARM_EXTCLK,},
+	{ .frequency = 400000, .index = ARM_50_OPP,},
+	{ .frequency = 800000, .index = ARM_100_OPP,},
+	{ .frequency = CPUFREQ_TABLE_END,}, /* To be used for MAX_OPP. */
+	{ .frequency = CPUFREQ_TABLE_END,},
+};
+
+static long round_armss_rate(unsigned long rate)
+{
+	long freq = 0;
+	int i = 0;
+
+	/* cpufreq table frequencies is in KHz. */
+	rate = rate / 1000;
+
+	/* Find the corresponding arm opp from the cpufreq table. */
+	while (db8500_cpufreq_table[i].frequency != CPUFREQ_TABLE_END) {
+		freq = db8500_cpufreq_table[i].frequency;
+		if (freq == rate)
+			break;
+		i++;
+	}
+
+	/* Return the last valid value, even if a match was not found. */
+	return freq * 1000;
+}
+
 #define MIN_PLL_VCO_RATE 600000000ULL
 #define MAX_PLL_VCO_RATE 1680640000ULL
 
@@ -1891,6 +1912,8 @@ long prcmu_round_clock_rate(u8 clock, unsigned long rate)
 {
 	if (clock < PRCMU_NUM_REG_CLOCKS)
 		return round_clock_rate(clock, rate);
+	else if (clock == PRCMU_ARMSS)
+		return round_armss_rate(rate);
 	else if (clock == PRCMU_PLLDSI)
 		return round_plldsi_rate(rate);
 	else if ((clock == PRCMU_DSI0CLK) || (clock == PRCMU_DSI1CLK))
@@ -1950,6 +1973,27 @@ static void set_clock_rate(u8 clock, unsigned long rate)
 	spin_unlock_irqrestore(&clk_mgt_lock, flags);
 }
 
+static int set_armss_rate(unsigned long rate)
+{
+	int i = 0;
+
+	/* cpufreq table frequencies is in KHz. */
+	rate = rate / 1000;
+
+	/* Find the corresponding arm opp from the cpufreq table. */
+	while (db8500_cpufreq_table[i].frequency != CPUFREQ_TABLE_END) {
+		if (db8500_cpufreq_table[i].frequency == rate)
+			break;
+		i++;
+	}
+
+	if (db8500_cpufreq_table[i].frequency != rate)
+		return -EINVAL;
+
+	/* Set the new arm opp. */
+	return db8500_prcmu_set_arm_opp(db8500_cpufreq_table[i].index);
+}
+
 static int set_plldsi_rate(unsigned long rate)
 {
 	unsigned long src_rate;
@@ -2030,6 +2074,8 @@ int prcmu_set_clock_rate(u8 clock, unsigned long rate)
 {
 	if (clock < PRCMU_NUM_REG_CLOCKS)
 		set_clock_rate(clock, rate);
+	else if (clock == PRCMU_ARMSS)
+		return set_armss_rate(rate);
 	else if (clock == PRCMU_PLLDSI)
 		return set_plldsi_rate(rate);
 	else if ((clock == PRCMU_DSI0CLK) || (clock == PRCMU_DSI1CLK))
@@ -2754,8 +2800,6 @@ void __init db8500_prcmu_early_init(void)
 	init_completion(&mb5_transfer.work);
 
 	INIT_WORK(&mb0_transfer.mask_work, prcmu_mask_work);
-
-	compute_armss_rate();
 }
 
 static void __init init_prcm_registers(void)
@@ -3020,6 +3064,8 @@ static struct mfd_cell db8500_prcmu_devs[] = {
 	{
 		.name = "cpufreq-u8500",
 		.of_compatible = "stericsson,cpufreq-u8500",
+		.platform_data = &db8500_cpufreq_table,
+		.pdata_size = sizeof(db8500_cpufreq_table),
 	},
 	{
 		.name = "ab8500-core",
@@ -3030,6 +3076,14 @@ static struct mfd_cell db8500_prcmu_devs[] = {
 	},
 };
 
+static void db8500_prcmu_update_cpufreq(void)
+{
+	if (prcmu_has_arm_maxopp()) {
+		db8500_cpufreq_table[3].frequency = 1000000;
+		db8500_cpufreq_table[3].index = ARM_MAX_OPP;
+	}
+}
+
 /**
  * prcmu_fw_init - arch init call for the Linux PRCMU fw init logic
  *
@@ -3074,6 +3128,8 @@ static int __devinit db8500_prcmu_probe(struct platform_device *pdev)
 	if (cpu_is_u8500v20_or_later())
 		prcmu_config_esram0_deep_sleep(ESRAM0_DEEP_SLEEP_STATE_RET);
 
+	db8500_prcmu_update_cpufreq();
+
 	err = mfd_add_devices(&pdev->dev, 0, db8500_prcmu_devs,
 			      ARRAY_SIZE(db8500_prcmu_devs), NULL, 0, NULL);
 	if (err) {