omap4: support TPS programming
TPS62361 is the new power supply used in OMAP4460 that
supplies vdd_mpu.
VCORE1 from Phoenix supplies vdd_core and VCORE2 supplies
vdd_iva. VCORE3 is not used in OMAP4460.
Signed-off-by: Aneesh V <aneesh@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
diff --git a/arch/arm/cpu/armv7/omap4/board.c b/arch/arm/cpu/armv7/omap4/board.c
index 3c61b1c..5943d61 100644
--- a/arch/arm/cpu/armv7/omap4/board.c
+++ b/arch/arm/cpu/armv7/omap4/board.c
@@ -90,6 +90,10 @@
do_set_mux(CONTROL_PADCONF_WKUP, wkup_padconf_array_essential,
sizeof(wkup_padconf_array_essential) /
sizeof(struct pad_conf_entry));
+
+ /* gpio_wk7 is used for controlling TPS on 4460 */
+ if (omap_revision() >= OMAP4460_ES1_0)
+ writew(M3, CONTROL_WKUP_PAD1_FREF_CLK4_REQ);
}
static void set_mux_conf_regs(void)
diff --git a/arch/arm/cpu/armv7/omap4/clocks.c b/arch/arm/cpu/armv7/omap4/clocks.c
index 660b329..0db9d18 100644
--- a/arch/arm/cpu/armv7/omap4/clocks.c
+++ b/arch/arm/cpu/armv7/omap4/clocks.c
@@ -34,6 +34,7 @@
#include <asm/arch/clocks.h>
#include <asm/arch/sys_proto.h>
#include <asm/utils.h>
+#include <asm/omap_gpio.h>
#ifndef CONFIG_SPL_BUILD
/*
@@ -421,6 +422,34 @@
do_setup_dpll(&prcm->cm_clkmode_dpll_abe, params, DPLL_LOCK);
}
+static void do_scale_tps62361(u32 reg, u32 volt_mv)
+{
+ u32 temp, step;
+
+ step = volt_mv - TPS62361_BASE_VOLT_MV;
+ step /= 10;
+
+ /*
+ * Select SET1 in TPS62361:
+ * VSEL1 is grounded on board. So the following selects
+ * VSEL1 = 0 and VSEL0 = 1
+ */
+ omap_set_gpio_direction(TPS62361_VSEL0_GPIO, 0);
+ omap_set_gpio_dataout(TPS62361_VSEL0_GPIO, 1);
+
+ temp = TPS62361_I2C_SLAVE_ADDR |
+ (reg << PRM_VC_VAL_BYPASS_REGADDR_SHIFT) |
+ (step << PRM_VC_VAL_BYPASS_DATA_SHIFT) |
+ PRM_VC_VAL_BYPASS_VALID_BIT;
+ debug("do_scale_tps62361: volt - %d step - 0x%x\n", volt_mv, step);
+
+ writel(temp, &prcm->prm_vc_val_bypass);
+ if (!wait_on_value(PRM_VC_VAL_BYPASS_VALID_BIT, 0,
+ &prcm->prm_vc_val_bypass, LDELAY)) {
+ puts("Scaling voltage failed for vdd_mpu from TPS\n");
+ }
+}
+
static void do_scale_vcore(u32 vcore_reg, u32 volt_mv)
{
u32 temp, offset_code;
@@ -461,7 +490,7 @@
*/
static void scale_vcores(void)
{
- u32 volt, sys_clk_khz, cycles_hi, cycles_low, temp;
+ u32 volt, sys_clk_khz, cycles_hi, cycles_low, temp, omap4_rev;
sys_clk_khz = get_sys_clk_freq() / 1000;
@@ -481,23 +510,45 @@
/* Disable high speed mode and all advanced features */
writel(0x0, &prcm->prm_vc_cfg_i2c_mode);
+ omap4_rev = omap_revision();
+ /* TPS - supplies vdd_mpu on 4460 */
+ if (omap4_rev >= OMAP4460_ES1_0) {
+ volt = 1430;
+ do_scale_tps62361(TPS62361_REG_ADDR_SET1, volt);
+ }
+
/*
- * VCORE 1 - 4430 : supplies vdd_mpu
+ * VCORE 1
+ *
+ * 4430 : supplies vdd_mpu
* Setting a high voltage for Nitro mode as smart reflex is not enabled.
* We use the maximum possible value in the AVS range because the next
* higher voltage in the discrete range (code >= 0b111010) is way too
* high
+ *
+ * 4460 : supplies vdd_core
*/
- volt = 1417;
- do_scale_vcore(SMPS_REG_ADDR_VCORE1, volt);
+ if (omap4_rev < OMAP4460_ES1_0) {
+ volt = 1417;
+ do_scale_vcore(SMPS_REG_ADDR_VCORE1, volt);
+ } else {
+ volt = 1200;
+ do_scale_vcore(SMPS_REG_ADDR_VCORE1, volt);
+ }
/* VCORE 2 - supplies vdd_iva */
volt = 1200;
do_scale_vcore(SMPS_REG_ADDR_VCORE2, volt);
- /* VCORE 3 - supplies vdd_core */
- volt = 1200;
- do_scale_vcore(SMPS_REG_ADDR_VCORE3, volt);
+ /*
+ * VCORE 3
+ * 4430 : supplies vdd_core
+ * 4460 : not connected
+ */
+ if (omap4_rev < OMAP4460_ES1_0) {
+ volt = 1200;
+ do_scale_vcore(SMPS_REG_ADDR_VCORE3, volt);
+ }
}
static inline void enable_clock_domain(u32 *const clkctrl_reg, u32 enable_mode)