mfd: db8500: Provide cpufreq table as platform data
authorUlf Hansson <ulf.hansson@linaro.org>
Wed, 10 Oct 2012 11:42:23 +0000 (13:42 +0200)
committerMike Turquette <mturquette@ti.com>
Sat, 10 Nov 2012 00:43:34 +0000 (16:43 -0800)
The cpufreq table needs dynamically update due to what the PRCMU
firmware is supporting. The table is then provided through to the
mfd child device as platform data.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
drivers/mfd/db8500-prcmu.c

index 3167bfdd13fa04011ffa231fde753c5cd4098d3a..ea15650188991489f50f11eb1f550039d4fdb10c 100644 (file)
@@ -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>
@@ -3002,6 +3003,15 @@ static struct regulator_init_data db8500_regulators[DB8500_NUM_REGULATORS] = {
        },
 };
 
+/* 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 struct resource ab8500_resources[] = {
        [0] = {
                .start  = IRQ_DB8500_AB8500,
@@ -3020,6 +3030,8 @@ 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 +3042,14 @@ 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 +3094,8 @@ 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) {