[U-Boot] [PATCH 1/5] Add debug output to mx29 SPL source files
Graeme Russ
gruss at tss-engineering.com
Wed Jan 21 12:55:14 CET 2015
Signed-off-by: Graeme Russ <gruss at tss-engineering.com>
---
arch/arm/cpu/arm926ejs/mxs/spl_boot.c | 1 +
arch/arm/cpu/arm926ejs/mxs/spl_lradc_init.c | 13 +++-
arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c | 18 +++++
arch/arm/cpu/arm926ejs/mxs/spl_power_init.c | 100 +++++++++++++++++++++++++++-
4 files changed, 127 insertions(+), 5 deletions(-)
diff --git a/arch/arm/cpu/arm926ejs/mxs/spl_boot.c b/arch/arm/cpu/arm926ejs/mxs/spl_boot.c
index d29b9aa..2a5f817 100644
--- a/arch/arm/cpu/arm926ejs/mxs/spl_boot.c
+++ b/arch/arm/cpu/arm926ejs/mxs/spl_boot.c
@@ -147,6 +147,7 @@ void mxs_common_spl_init(const uint32_t arg, const uint32_t *resptr,
mxs_iomux_setup_multiple_pads(iomux_setup, iomux_size);
mxs_spl_console_init();
+ debug("SPL: Serial Console Initialised\n");
mxs_power_init();
diff --git a/arch/arm/cpu/arm926ejs/mxs/spl_lradc_init.c b/arch/arm/cpu/arm926ejs/mxs/spl_lradc_init.c
index cdfcddd..9e6f24a 100644
--- a/arch/arm/cpu/arm926ejs/mxs/spl_lradc_init.c
+++ b/arch/arm/cpu/arm926ejs/mxs/spl_lradc_init.c
@@ -18,6 +18,8 @@ void mxs_lradc_init(void)
{
struct mxs_lradc_regs *regs = (struct mxs_lradc_regs *)MXS_LRADC_BASE;
+ debug("SPL: Initialisating LRADC");
+
writel(LRADC_CTRL0_SFTRST, ®s->hw_lradc_ctrl0_clr);
writel(LRADC_CTRL0_CLKGATE, ®s->hw_lradc_ctrl0_clr);
writel(LRADC_CTRL0_ONCHIP_GROUNDREF, ®s->hw_lradc_ctrl0_clr);
@@ -37,9 +39,15 @@ void mxs_lradc_enable_batt_measurement(void)
{
struct mxs_lradc_regs *regs = (struct mxs_lradc_regs *)MXS_LRADC_BASE;
+ debug("SPL: Enabling LRADC battery measurement\n");
+
/* Check if the channel is present at all. */
- if (!(readl(®s->hw_lradc_status) & LRADC_STATUS_CHANNEL7_PRESENT))
+ if (!(readl(®s->hw_lradc_status) & LRADC_STATUS_CHANNEL7_PRESENT)) {
+ debug("SPL: LRADC channel 7 is not present - aborting\n");
return;
+ }
+
+ debug("SPL: LRADC channel 7 is present - configuring\n");
writel(LRADC_CTRL1_LRADC7_IRQ_EN, ®s->hw_lradc_ctrl1_clr);
writel(LRADC_CTRL1_LRADC7_IRQ, ®s->hw_lradc_ctrl1_clr);
@@ -65,6 +73,7 @@ void mxs_lradc_enable_batt_measurement(void)
100, ®s->hw_lradc_delay3);
writel(0xffffffff, ®s->hw_lradc_ch7_clr);
-
writel(LRADC_DELAY_KICK, ®s->hw_lradc_delay3_set);
+
+ debug("SPL: LRADC channel 7 configuration complete\n");
}
diff --git a/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c b/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c
index 97ef67d..a744e5d 100644
--- a/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c
+++ b/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c
@@ -92,6 +92,7 @@ static uint32_t dram_vals[] = {
__weak void mxs_adjust_memory_params(uint32_t *dram_vals)
{
+ debug("SPL: Using default SDRAM parameters\n");
}
#ifdef CONFIG_MX28
@@ -99,8 +100,10 @@ static void initialize_dram_values(void)
{
int i;
+ debug("SPL: Setting mx28 board specific SDRAM parameters\n");
mxs_adjust_memory_params(dram_vals);
+ debug("SPL: Applying SDRAM parameters\n");
for (i = 0; i < ARRAY_SIZE(dram_vals); i++)
writel(dram_vals[i], MXS_DRAM_BASE + (4 * i));
}
@@ -109,6 +112,7 @@ static void initialize_dram_values(void)
{
int i;
+ debug("SPL: Setting mx23 board specific SDRAM parameters\n");
mxs_adjust_memory_params(dram_vals);
/*
@@ -120,6 +124,7 @@ static void initialize_dram_values(void)
* HW_DRAM_CTL8 is setup as the last element.
* So skip the initialization of these HW_DRAM_CTL registers.
*/
+ debug("SPL: Applying SDRAM parameters\n");
for (i = 0; i < ARRAY_SIZE(dram_vals); i++) {
if (i == 8 || i == 27 || i == 28 || i == 35)
continue;
@@ -146,6 +151,8 @@ static void mxs_mem_init_clock(void)
const unsigned char divider = 21;
#endif
+ debug("SPL: Initialising FRAC0\n");
+
/* Gate EMI clock */
writeb(CLKCTRL_FRAC_CLKGATE,
&clkctrl_regs->hw_clkctrl_frac0_set[CLKCTRL_FRAC0_EMI]);
@@ -170,6 +177,7 @@ static void mxs_mem_init_clock(void)
&clkctrl_regs->hw_clkctrl_clkseq_clr);
early_delay(10000);
+ debug("SPL: FRAC0 Initialised\n");
}
static void mxs_mem_setup_cpu_and_hbus(void)
@@ -177,6 +185,8 @@ static void mxs_mem_setup_cpu_and_hbus(void)
struct mxs_clkctrl_regs *clkctrl_regs =
(struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
+ debug("SPL: Setting CPU and HBUS clock frequencies\n");
+
/* Set fractional divider for ref_cpu to 480 * 18 / 19 = 454MHz
* and ungate CPU clock */
writeb(19 & CLKCTRL_FRAC_FRAC_MASK,
@@ -209,6 +219,8 @@ static void mxs_mem_setup_vdda(void)
struct mxs_power_regs *power_regs =
(struct mxs_power_regs *)MXS_POWER_BASE;
+ debug("SPL: Configuring VDDA\n");
+
writel((0xc << POWER_VDDACTRL_TRG_OFFSET) |
(0x7 << POWER_VDDACTRL_BO_OFFSET_OFFSET) |
POWER_VDDACTRL_LINREG_OFFSET_1STEPS_BELOW,
@@ -240,6 +252,8 @@ static void mx23_mem_setup_vddmem(void)
struct mxs_power_regs *power_regs =
(struct mxs_power_regs *)MXS_POWER_BASE;
+ debug("SPL: Setting mx23 VDDMEM\n");
+
/* We must wait before and after disabling the current limiter! */
early_delay(10000);
@@ -252,6 +266,8 @@ static void mx23_mem_setup_vddmem(void)
static void mx23_mem_init(void)
{
+ debug("SPL: Initialising mx23 SDRAM Controller\n");
+
/*
* Reset/ungate the EMI block. This is essential, otherwise the system
* suffers from memory instability. This thing is mx23 specific and is
@@ -297,6 +313,8 @@ static void mx28_mem_init(void)
struct mxs_pinctrl_regs *pinctrl_regs =
(struct mxs_pinctrl_regs *)MXS_PINCTRL_BASE;
+ debug("SPL: Initialising mx28 SDRAM Controller\n");
+
/* Set DDR2 mode */
writel(PINCTRL_EMI_DS_CTRL_DDR_MODE_DDR2,
&pinctrl_regs->hw_pinctrl_emi_ds_ctrl_set);
diff --git a/arch/arm/cpu/arm926ejs/mxs/spl_power_init.c b/arch/arm/cpu/arm926ejs/mxs/spl_power_init.c
index 1c54ab7..7fb734e 100644
--- a/arch/arm/cpu/arm926ejs/mxs/spl_power_init.c
+++ b/arch/arm/cpu/arm926ejs/mxs/spl_power_init.c
@@ -26,6 +26,8 @@ static void mxs_power_clock2xtal(void)
struct mxs_clkctrl_regs *clkctrl_regs =
(struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
+ debug("SPL: Switching CPU clock to 24MHz XTAL\n");
+
/* Set XTAL as CPU reference clock */
writel(CLKCTRL_CLKSEQ_BYPASS_CPU,
&clkctrl_regs->hw_clkctrl_clkseq_set);
@@ -43,9 +45,23 @@ static void mxs_power_clock2pll(void)
struct mxs_clkctrl_regs *clkctrl_regs =
(struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
+ debug("SPL: Switching CPU core clock source to PLL\n");
+
+ /*
+ * TODO: Are we really? It looks like we turn on PLL0, but we then
+ * set the CLKCTRL_CLKSEQ_BYPASS_CPU bit of the (which was already
+ * set by mxs_power_clock2xtal()). Clearing this bit here seems to
+ * introduce some instability (causing the CPU core to hang). Maybe
+ * we aren't giving PLL0 enough time to stabilise?
+ */
setbits_le32(&clkctrl_regs->hw_clkctrl_pll0ctrl0,
CLKCTRL_PLL0CTRL0_POWER);
early_delay(100);
+
+ /*
+ * TODO: Should the PLL0 FORCE_LOCK bit be set here followed be a
+ * wait on the PLL0 LOCK bit?
+ */
setbits_le32(&clkctrl_regs->hw_clkctrl_clkseq,
CLKCTRL_CLKSEQ_BYPASS_CPU);
}
@@ -62,6 +78,8 @@ static void mxs_power_set_auto_restart(void)
struct mxs_rtc_regs *rtc_regs =
(struct mxs_rtc_regs *)MXS_RTC_BASE;
+ debug("SPL: Setting auto-restart bit\n");
+
writel(RTC_CTRL_SFTRST, &rtc_regs->hw_rtc_ctrl_clr);
while (readl(&rtc_regs->hw_rtc_ctrl) & RTC_CTRL_SFTRST)
;
@@ -101,14 +119,17 @@ static void mxs_power_set_linreg(void)
(struct mxs_power_regs *)MXS_POWER_BASE;
/* Set linear regulator 25mV below switching converter */
+ debug("SPL: Setting VDDD 25mV below DC-DC converters\n");
clrsetbits_le32(&power_regs->hw_power_vdddctrl,
POWER_VDDDCTRL_LINREG_OFFSET_MASK,
POWER_VDDDCTRL_LINREG_OFFSET_1STEPS_BELOW);
+ debug("SPL: Setting VDDA 25mV below DC-DC converters\n");
clrsetbits_le32(&power_regs->hw_power_vddactrl,
POWER_VDDACTRL_LINREG_OFFSET_MASK,
POWER_VDDACTRL_LINREG_OFFSET_1STEPS_BELOW);
+ debug("SPL: Setting VDDIO 25mV below DC-DC converters\n");
clrsetbits_le32(&power_regs->hw_power_vddioctrl,
POWER_VDDIOCTRL_LINREG_OFFSET_MASK,
POWER_VDDIOCTRL_LINREG_OFFSET_1STEPS_BELOW);
@@ -127,6 +148,8 @@ static int mxs_get_batt_volt(void)
volt &= POWER_BATTMONITOR_BATT_VAL_MASK;
volt >>= POWER_BATTMONITOR_BATT_VAL_OFFSET;
volt *= 8;
+
+ debug("SPL: Battery Voltage = %dmV\n", volt);
return volt;
}
@@ -154,8 +177,10 @@ static int mxs_is_batt_good(void)
(struct mxs_power_regs *)MXS_POWER_BASE;
uint32_t volt = mxs_get_batt_volt();
- if ((volt >= 2400) && (volt <= 4300))
+ if ((volt >= 2400) && (volt <= 4300)) {
+ debug("SPL: Battery is good\n");
return 1;
+ }
clrsetbits_le32(&power_regs->hw_power_5vctrl,
POWER_5VCTRL_CHARGE_4P2_ILIMIT_MASK,
@@ -175,16 +200,21 @@ static int mxs_is_batt_good(void)
volt = mxs_get_batt_volt();
- if (volt >= 3500)
+ if (volt >= 3500) {
+ debug("SPL: Battery Voltage too high\n");
return 0;
+ }
- if (volt >= 2400)
+ if (volt >= 2400) {
+ debug("SPL: Battery is good\n");
return 1;
+ }
writel(POWER_CHARGE_STOP_ILIMIT_MASK | POWER_CHARGE_BATTCHRG_I_MASK,
&power_regs->hw_power_charge_clr);
writel(POWER_CHARGE_PWD_BATTCHRG, &power_regs->hw_power_charge_set);
+ debug("SPL: Battery Voltage too low\n");
return 0;
}
@@ -203,6 +233,7 @@ static void mxs_power_setup_5v_detect(void)
(struct mxs_power_regs *)MXS_POWER_BASE;
/* Start 5V detection */
+ debug("SPL: Starting 5V input detection comparator\n");
clrsetbits_le32(&power_regs->hw_power_5vctrl,
POWER_5VCTRL_VBUSVALID_TRSH_MASK,
POWER_5VCTRL_VBUSVALID_TRSH_4V4 |
@@ -220,6 +251,8 @@ static void mxs_src_power_init(void)
struct mxs_power_regs *power_regs =
(struct mxs_power_regs *)MXS_POWER_BASE;
+ debug("SPL: Pre-Configuring power block\n");
+
/* Improve efficieny and reduce transient ripple */
writel(POWER_LOOPCTRL_TOGGLE_DIF | POWER_LOOPCTRL_EN_CM_HYST |
POWER_LOOPCTRL_EN_DF_HYST, &power_regs->hw_power_loopctrl_set);
@@ -257,6 +290,8 @@ static void mxs_power_init_4p2_params(void)
struct mxs_power_regs *power_regs =
(struct mxs_power_regs *)MXS_POWER_BASE;
+ debug("SPL: Configuring common 4P2 regulator params\n");
+
/* Setup 4P2 parameters */
clrsetbits_le32(&power_regs->hw_power_dcdc4p2,
POWER_DCDC4P2_CMPTRIP_MASK | POWER_DCDC4P2_TRG_MASK,
@@ -289,6 +324,8 @@ static void mxs_enable_4p2_dcdc_input(int xfer)
uint32_t tmp, vbus_thresh, vbus_5vdetect, pwd_bo;
uint32_t prev_5v_brnout, prev_5v_droop;
+ debug("SPL: %s 4P2 DC-DC Input\n", xfer ? "Enabling" : "Disabling");
+
prev_5v_brnout = readl(&power_regs->hw_power_5vctrl) &
POWER_5VCTRL_PWDN_5VBRNOUT;
prev_5v_droop = readl(&power_regs->hw_power_ctrl) &
@@ -390,6 +427,8 @@ static void mxs_power_init_4p2_regulator(void)
(struct mxs_power_regs *)MXS_POWER_BASE;
uint32_t tmp, tmp2;
+ debug("SPL: Enabling 4P2 regulator\n");
+
setbits_le32(&power_regs->hw_power_dcdc4p2, POWER_DCDC4P2_ENABLE_4P2);
writel(POWER_CHARGE_ENABLE_LOAD, &power_regs->hw_power_charge_set);
@@ -407,6 +446,7 @@ static void mxs_power_init_4p2_regulator(void)
* gradually to avoid large inrush current from the 5V cable which can
* cause transients/problems
*/
+ debug("SPL: Charging 4P2 capacitor\n");
mxs_enable_4p2_dcdc_input(0);
if (readl(&power_regs->hw_power_ctrl) & POWER_CTRL_VBUS_VALID_IRQ) {
@@ -420,6 +460,8 @@ static void mxs_power_init_4p2_regulator(void)
POWER_DCDC4P2_ENABLE_DCDC);
writel(POWER_5VCTRL_PWD_CHARGE_4P2_MASK,
&power_regs->hw_power_5vctrl_set);
+
+ debug("SPL: Unable to recover from mx23 errata 5837\n");
hang();
}
@@ -433,6 +475,7 @@ static void mxs_power_init_4p2_regulator(void)
* current limit until the brownout status is false or until we've
* reached our maximum defined 4p2 current limit.
*/
+ debug("SPL: Setting 4P2 brownout level\n");
clrsetbits_le32(&power_regs->hw_power_dcdc4p2,
POWER_DCDC4P2_BO_MASK,
22 << POWER_DCDC4P2_BO_OFFSET); /* 4.15V */
@@ -479,8 +522,11 @@ static void mxs_power_init_dcdc_4p2_source(void)
struct mxs_power_regs *power_regs =
(struct mxs_power_regs *)MXS_POWER_BASE;
+ debug("SPL: Switching DC-DC converters to 4P2\n");
+
if (!(readl(&power_regs->hw_power_dcdc4p2) &
POWER_DCDC4P2_ENABLE_DCDC)) {
+ debug("SPL: Already switched - aborting\n");
hang();
}
@@ -509,6 +555,8 @@ static void mxs_power_enable_4p2(void)
uint32_t vdddctrl, vddactrl, vddioctrl;
uint32_t tmp;
+ debug("SPL: Powering up 4P2 regulator\n");
+
vdddctrl = readl(&power_regs->hw_power_vdddctrl);
vddactrl = readl(&power_regs->hw_power_vddactrl);
vddioctrl = readl(&power_regs->hw_power_vddioctrl);
@@ -559,6 +607,8 @@ static void mxs_power_enable_4p2(void)
if (tmp)
writel(POWER_CHARGE_ENABLE_LOAD,
&power_regs->hw_power_charge_clr);
+
+ debug("SPL: 4P2 regulator powered-up\n");
}
/**
@@ -574,6 +624,8 @@ static void mxs_boot_valid_5v(void)
struct mxs_power_regs *power_regs =
(struct mxs_power_regs *)MXS_POWER_BASE;
+ debug("SPL: Booting from 5V supply\n");
+
/*
* Use VBUSVALID level instead of VDD5V_GT_VDDIO level to trigger a 5V
* disconnect event. FIXME
@@ -601,6 +653,9 @@ static void mxs_powerdown(void)
{
struct mxs_power_regs *power_regs =
(struct mxs_power_regs *)MXS_POWER_BASE;
+
+ debug("Powering Down\n");
+
writel(POWER_RESET_UNLOCK_KEY, &power_regs->hw_power_reset);
writel(POWER_RESET_UNLOCK_KEY | POWER_RESET_PWD_OFF,
&power_regs->hw_power_reset);
@@ -617,6 +672,8 @@ static void mxs_batt_boot(void)
struct mxs_power_regs *power_regs =
(struct mxs_power_regs *)MXS_POWER_BASE;
+ debug("SPL: Configuring power block to boot from battery\n");
+
clrbits_le32(&power_regs->hw_power_5vctrl, POWER_5VCTRL_PWDN_5VBRNOUT);
clrbits_le32(&power_regs->hw_power_5vctrl, POWER_5VCTRL_ENABLE_DCDC);
@@ -672,6 +729,8 @@ static void mxs_handle_5v_conflict(void)
(struct mxs_power_regs *)MXS_POWER_BASE;
uint32_t tmp;
+ debug("SPL: Resolving 5V conflict\n");
+
setbits_le32(&power_regs->hw_power_vddioctrl,
POWER_VDDIOCTRL_BO_OFFSET_MASK);
@@ -683,19 +742,27 @@ static void mxs_handle_5v_conflict(void)
* VDDIO has a brownout, then the VDD5V_GT_VDDIO becomes
* unreliable
*/
+ debug("SPL: VDDIO has a brownout\n");
mxs_powerdown();
break;
}
if (tmp & POWER_STS_VDD5V_GT_VDDIO) {
+ debug("SPL: POWER_STS_VDD5V_GT_VDDIO is set\n");
mxs_boot_valid_5v();
break;
} else {
+ debug("SPL: POWER_STS_VDD5V_GT_VDDIO is not set\n");
mxs_powerdown();
break;
}
+ /*
+ * TODO: I can't see this being reached. We'll either
+ * powerdown or boot from a stable 5V supply.
+ */
if (tmp & POWER_STS_PSWITCH_MASK) {
+ debug("SPL: POWER_STS_PSWITCH_MASK is set\n");
mxs_batt_boot();
break;
}
@@ -713,21 +780,26 @@ static void mxs_5v_boot(void)
struct mxs_power_regs *power_regs =
(struct mxs_power_regs *)MXS_POWER_BASE;
+ debug("SPL: Configuring power block to boot from 5V input\n");
+
/*
* NOTE: In original IMX-Bootlets, this also checks for VBUSVALID,
* but their implementation always returns 1 so we omit it here.
*/
if (readl(&power_regs->hw_power_sts) & POWER_STS_VDD5V_GT_VDDIO) {
+ debug("SPL: 5V VDD good\n");
mxs_boot_valid_5v();
return;
}
early_delay(1000);
if (readl(&power_regs->hw_power_sts) & POWER_STS_VDD5V_GT_VDDIO) {
+ debug("SPL: 5V VDD good (after delay)\n");
mxs_boot_valid_5v();
return;
}
+ debug("SPL: 5V VDD not good\n");
mxs_handle_5v_conflict();
}
@@ -742,6 +814,8 @@ static void mxs_init_batt_bo(void)
struct mxs_power_regs *power_regs =
(struct mxs_power_regs *)MXS_POWER_BASE;
+ debug("SPL: Initialising battery brown-out level to 3.0V\n");
+
/* Brownout at 3V */
clrsetbits_le32(&power_regs->hw_power_battmonitor,
POWER_BATTMONITOR_BRWNOUT_LVL_MASK,
@@ -762,6 +836,8 @@ static void mxs_switch_vddd_to_dcdc_source(void)
struct mxs_power_regs *power_regs =
(struct mxs_power_regs *)MXS_POWER_BASE;
+ debug("SPL: Switching VDDD to DC-DC converters\n");
+
clrsetbits_le32(&power_regs->hw_power_vdddctrl,
POWER_VDDDCTRL_LINREG_OFFSET_MASK,
POWER_VDDDCTRL_LINREG_OFFSET_1STEPS_BELOW);
@@ -788,6 +864,8 @@ static void mxs_power_configure_power_source(void)
struct mxs_lradc_regs *lradc_regs =
(struct mxs_lradc_regs *)MXS_LRADC_BASE;
+ debug("SPL: Configuring power source\n");
+
mxs_src_power_init();
if (readl(&power_regs->hw_power_sts) & POWER_STS_VDD5V_GT_VDDIO) {
@@ -811,6 +889,10 @@ static void mxs_power_configure_power_source(void)
mxs_batt_boot();
}
+ /*
+ * TODO: Do not switch CPU clock to PLL if we are VDD5V is sourced
+ * from USB VBUS
+ */
mxs_power_clock2pll();
mxs_init_batt_bo();
@@ -819,6 +901,7 @@ static void mxs_power_configure_power_source(void)
#ifdef CONFIG_MX23
/* Fire up the VDDMEM LinReg now that we're all set. */
+ debug("SPL: Enabling mx23 VDDMEM linear regulator\n");
writel(POWER_VDDMEMCTRL_ENABLE_LINREG | POWER_VDDMEMCTRL_ENABLE_ILIMIT,
&power_regs->hw_power_vddmemctrl);
#endif
@@ -838,6 +921,8 @@ static void mxs_enable_output_rail_protection(void)
struct mxs_power_regs *power_regs =
(struct mxs_power_regs *)MXS_POWER_BASE;
+ debug("SPL: Enabling output rail protection\n");
+
writel(POWER_CTRL_VDDD_BO_IRQ | POWER_CTRL_VDDA_BO_IRQ |
POWER_CTRL_VDDIO_BO_IRQ, &power_regs->hw_power_ctrl_clr);
@@ -1077,6 +1162,8 @@ static void mxs_power_set_vddx(const struct mxs_vddx_cfg *cfg,
*/
static void mxs_setup_batt_detect(void)
{
+ debug("SPL: Starting battery voltage measurement logic\n");
+
mxs_lradc_init();
mxs_lradc_enable_batt_measurement();
early_delay(10);
@@ -1111,6 +1198,8 @@ void mxs_power_init(void)
struct mxs_power_regs *power_regs =
(struct mxs_power_regs *)MXS_POWER_BASE;
+ debug("SPL: Initialising Power Block\n");
+
mxs_ungate_power();
mxs_power_clock2xtal();
@@ -1123,9 +1212,13 @@ void mxs_power_init(void)
mxs_power_configure_power_source();
mxs_enable_output_rail_protection();
+ debug("SPL: Setting VDDIO to 3V3 (brownout @ 3v15)\n");
mxs_power_set_vddx(&mxs_vddio_cfg, 3300, 3150);
+
+ debug("SPL: Setting VDDD to 1V5 (brownout @ 1v0)\n");
mxs_power_set_vddx(&mxs_vddd_cfg, 1500, 1000);
#ifdef CONFIG_MX23
+ debug("SPL: Setting mx23 VDDMEM to 2V5 (brownout @ 1v7)\n");
mxs_power_set_vddx(&mxs_vddmem_cfg, 2500, 1700);
#endif
writel(POWER_CTRL_VDDD_BO_IRQ | POWER_CTRL_VDDA_BO_IRQ |
@@ -1150,6 +1243,7 @@ void mxs_power_wait_pswitch(void)
struct mxs_power_regs *power_regs =
(struct mxs_power_regs *)MXS_POWER_BASE;
+ debug("SPL: Waiting for power switch input\n");
while (!(readl(&power_regs->hw_power_sts) & POWER_STS_PSWITCH_MASK))
;
}
--
1.9.3
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