1 files changed, 41 insertions, 19 deletions

diff --git a/arch/arm/mach-pxa/cpufreq-pxa2xx.c b/arch/arm/mach-pxa/cpufreq-pxa2xx.c
index d82528e74bd..771dd4eac93 100644
--- a/arch/arm/mach-pxa/cpufreq-pxa2xx.c
+++ b/arch/arm/mach-pxa/cpufreq-pxa2xx.c
@@ -64,7 +64,7 @@ typedef struct {
 
 /* Define the refresh period in mSec for the SDRAM and the number of rows */
 #define SDRAM_TREF	64	/* standard 64ms SDRAM */
-#define SDRAM_ROWS	4096	/* 64MB=8192 32MB=4096 */
+static unsigned int sdram_rows;
 
 #define CCLKCFG_TURBO		0x1
 #define CCLKCFG_FCS		0x2
@@ -73,6 +73,9 @@ typedef struct {
 #define MDREFR_DB2_MASK		(MDREFR_K2DB2 | MDREFR_K1DB2)
 #define MDREFR_DRI_MASK		0xFFF
 
+#define MDCNFG_DRAC2(mdcnfg) (((mdcnfg) >> 21) & 0x3)
+#define MDCNFG_DRAC0(mdcnfg) (((mdcnfg) >> 5) & 0x3)
+
 /*
  * PXA255 definitions
  */
@@ -109,6 +112,10 @@ static struct cpufreq_frequency_table
 static struct cpufreq_frequency_table
 	pxa255_turbo_freq_table[NUM_PXA25x_TURBO_FREQS+1];
 
+static unsigned int pxa255_turbo_table;
+module_param(pxa255_turbo_table, uint, 0);
+MODULE_PARM_DESC(pxa255_turbo_table, "Selects the frequency table (0 = run table, !0 = turbo table)");
+
 /*
  * PXA270 definitions
  *
@@ -158,22 +165,16 @@ static struct cpufreq_frequency_table
 
 extern unsigned get_clk_frequency_khz(int info);
 
-static void find_freq_tables(struct cpufreq_policy *policy,
-			     struct cpufreq_frequency_table **freq_table,
+static void find_freq_tables(struct cpufreq_frequency_table **freq_table,
 			     pxa_freqs_t **pxa_freqs)
 {
 	if (cpu_is_pxa25x()) {
-		if (policy->policy == CPUFREQ_POLICY_PERFORMANCE) {
+		if (!pxa255_turbo_table) {
 			*pxa_freqs = pxa255_run_freqs;
 			*freq_table = pxa255_run_freq_table;
-		} else if (policy->policy == CPUFREQ_POLICY_POWERSAVE) {
+		} else {
 			*pxa_freqs = pxa255_turbo_freqs;
 			*freq_table = pxa255_turbo_freq_table;
-		} else {
-			printk("CPU PXA: Unknown policy found. "
-			       "Using CPUFREQ_POLICY_PERFORMANCE\n");
-			*pxa_freqs = pxa255_run_freqs;
-			*freq_table = pxa255_run_freq_table;
 		}
 	}
 	if (cpu_is_pxa27x()) {
@@ -194,14 +195,28 @@ static void pxa27x_guess_max_freq(void)
 	}
 }
 
+static void init_sdram_rows(void)
+{
+	uint32_t mdcnfg = MDCNFG;
+	unsigned int drac2 = 0, drac0 = 0;
+
+	if (mdcnfg & (MDCNFG_DE2 | MDCNFG_DE3))
+		drac2 = MDCNFG_DRAC2(mdcnfg);
+
+	if (mdcnfg & (MDCNFG_DE0 | MDCNFG_DE1))
+		drac0 = MDCNFG_DRAC0(mdcnfg);
+
+	sdram_rows = 1 << (11 + max(drac0, drac2));
+}
+
 static u32 mdrefr_dri(unsigned int freq)
 {
 	u32 dri = 0;
 
 	if (cpu_is_pxa25x())
-		dri = ((freq * SDRAM_TREF) / (SDRAM_ROWS * 32));
+		dri = ((freq * SDRAM_TREF) / (sdram_rows * 32));
 	if (cpu_is_pxa27x())
-		dri = ((freq * SDRAM_TREF) / (SDRAM_ROWS - 31)) / 32;
+		dri = ((freq * SDRAM_TREF) / (sdram_rows - 31)) / 32;
 	return dri;
 }
 
@@ -212,7 +227,7 @@ static int pxa_verify_policy(struct cpufreq_policy *policy)
 	pxa_freqs_t *pxa_freqs;
 	int ret;
 
-	find_freq_tables(policy, &pxa_freqs_table, &pxa_freqs);
+	find_freq_tables(&pxa_freqs_table, &pxa_freqs);
 	ret = cpufreq_frequency_table_verify(policy, pxa_freqs_table);
 
 	if (freq_debug)
@@ -240,7 +255,7 @@ static int pxa_set_target(struct cpufreq_policy *policy,
 	unsigned int unused, preset_mdrefr, postset_mdrefr, cclkcfg;
 
 	/* Get the current policy */
-	find_freq_tables(policy, &pxa_freqs_table, &pxa_freq_settings);
+	find_freq_tables(&pxa_freqs_table, &pxa_freq_settings);
 
 	/* Lookup the next frequency */
 	if (cpufreq_frequency_table_target(policy, pxa_freqs_table,
@@ -329,15 +344,16 @@ static __init int pxa_cpufreq_init(struct cpufreq_policy *policy)
 {
 	int i;
 	unsigned int freq;
+	struct cpufreq_frequency_table *pxa255_freq_table;
+	pxa_freqs_t *pxa255_freqs;
 
 	/* try to guess pxa27x cpu */
 	if (cpu_is_pxa27x())
 		pxa27x_guess_max_freq();
 
+	init_sdram_rows();
+
 	/* set default policy and cpuinfo */
-	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
-	if (cpu_is_pxa25x())
-		policy->policy = CPUFREQ_POLICY_PERFORMANCE;
 	policy->cpuinfo.transition_latency = 1000; /* FIXME: 1 ms, assumed */
 	policy->cur = get_clk_frequency_khz(0);	   /* current freq */
 	policy->min = policy->max = policy->cur;
@@ -357,6 +373,8 @@ static __init int pxa_cpufreq_init(struct cpufreq_policy *policy)
 	}
 	pxa255_turbo_freq_table[i].frequency = CPUFREQ_TABLE_END;
 
+	pxa255_turbo_table = !!pxa255_turbo_table;
+
 	/* Generate the pxa27x cpufreq_frequency_table struct */
 	for (i = 0; i < NUM_PXA27x_FREQS; i++) {
 		freq = pxa27x_freqs[i].khz;
@@ -371,8 +389,12 @@ static __init int pxa_cpufreq_init(struct cpufreq_policy *policy)
 	 * Set the policy's minimum and maximum frequencies from the tables
 	 * just constructed.  This sets cpuinfo.mxx_freq, min and max.
 	 */
-	if (cpu_is_pxa25x())
-		cpufreq_frequency_table_cpuinfo(policy, pxa255_run_freq_table);
+	if (cpu_is_pxa25x()) {
+		find_freq_tables(&pxa255_freq_table, &pxa255_freqs);
+		pr_info("PXA255 cpufreq using %s frequency table\n",
+			pxa255_turbo_table ? "turbo" : "run");
+		cpufreq_frequency_table_cpuinfo(policy, pxa255_freq_table);
+	}
 	else if (cpu_is_pxa27x())
 		cpufreq_frequency_table_cpuinfo(policy, pxa27x_freq_table);