ARM: keystone2: Fix dev and arm speed detection
Use common devspeed and armspeed definitions.
Also fix reading efuse bootrom register.
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
diff --git a/arch/arm/mach-keystone/clock.c b/arch/arm/mach-keystone/clock.c
index b5b66e4..aaeef79 100644
--- a/arch/arm/mach-keystone/clock.c
+++ b/arch/arm/mach-keystone/clock.c
@@ -11,7 +11,19 @@
#include <asm/arch/clock.h>
#include <asm/arch/clock_defs.h>
-#define MAX_SPEEDS 13
+/* DEV and ARM speed definitions as specified in DEVSPEED register */
+int __weak speeds[DEVSPEED_NUMSPDS] = {
+ SPD1000,
+ SPD1200,
+ SPD1350,
+ SPD1400,
+ SPD1500,
+ SPD1400,
+ SPD1350,
+ SPD1200,
+ SPD1000,
+ SPD800,
+};
static void wait_for_completion(const struct pll_init_data *data)
{
@@ -199,43 +211,44 @@
init_pll(&config[i]);
}
-static int get_max_speed(u32 val, int *speeds)
+static int get_max_speed(u32 val, u32 speed_supported)
{
- int j;
+ int speed;
- if (!val)
- return speeds[0];
-
- for (j = 1; j < MAX_SPEEDS; j++) {
- if (val == 1)
- return speeds[j];
- val >>= 1;
+ /* Left most setbit gives the speed */
+ for (speed = DEVSPEED_NUMSPDS; speed >= 0; speed--) {
+ if ((val & BIT(speed)) & speed_supported)
+ return speeds[speed];
}
+ /* If no bit is set, use SPD800 */
return SPD800;
}
-#ifdef CONFIG_SOC_K2HK
-static u32 read_efuse_bootrom(void)
-{
- return (cpu_revision() > 1) ? __raw_readl(KS2_EFUSE_BOOTROM) :
- __raw_readl(KS2_REV1_DEVSPEED);
-}
-#else
static inline u32 read_efuse_bootrom(void)
{
- return __raw_readl(KS2_EFUSE_BOOTROM);
+ if (cpu_is_k2hk() && (cpu_revision() <= 1))
+ return __raw_readl(KS2_REV1_DEVSPEED);
+ else
+ return __raw_readl(KS2_EFUSE_BOOTROM);
}
-#endif
-#ifndef CONFIG_SOC_K2E
-inline int get_max_arm_speed(void)
+int get_max_arm_speed(void)
{
- return get_max_speed(read_efuse_bootrom() & 0xffff, arm_speeds);
+ u32 armspeed = read_efuse_bootrom();
+
+ armspeed = (armspeed & DEVSPEED_ARMSPEED_MASK) >>
+ DEVSPEED_ARMSPEED_SHIFT;
+
+ return get_max_speed(armspeed, ARM_SUPPORTED_SPEEDS);
}
-#endif
-inline int get_max_dev_speed(void)
+int get_max_dev_speed(void)
{
- return get_max_speed((read_efuse_bootrom() >> 16) & 0xffff, dev_speeds);
+ u32 devspeed = read_efuse_bootrom();
+
+ devspeed = (devspeed & DEVSPEED_DEVSPEED_MASK) >>
+ DEVSPEED_DEVSPEED_SHIFT;
+
+ return get_max_speed(devspeed, DEV_SUPPORTED_SPEEDS);
}