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i.MX28: Add battery boot components to SPL

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Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Detlev Zundel <dzu@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
This commit is contained in:
Marek Vasut 2012-05-01 11:09:51 +00:00 committed by Albert ARIBAUD
parent 399d9dab3d
commit 7dec1bd11f
1 changed files with 92 additions and 8 deletions
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100
arch/arm/cpu/arm926ejs/mx28/spl_power_init.c
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@ -45,11 +45,11 @@ void mx28_power_clock2pll(void)
struct mx28_clkctrl_regs *clkctrl_regs =
(struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE;
writel(CLKCTRL_PLL0CTRL0_POWER,
&clkctrl_regs->hw_clkctrl_pll0ctrl0_set);
setbits_le32(&clkctrl_regs->hw_clkctrl_pll0ctrl0,
CLKCTRL_PLL0CTRL0_POWER);
early_delay(100);
writel(CLKCTRL_CLKSEQ_BYPASS_CPU,
&clkctrl_regs->hw_clkctrl_clkseq_clr);
setbits_le32(&clkctrl_regs->hw_clkctrl_clkseq,
CLKCTRL_CLKSEQ_BYPASS_CPU);
}
void mx28_power_clear_auto_restart(void)
@ -455,9 +455,14 @@ void mx28_power_enable_4p2(void)
mx28_power_init_4p2_regulator();
/* Shutdown battery (none present) */
clrbits_le32(&power_regs->hw_power_dcdc4p2, POWER_DCDC4P2_BO_MASK);
writel(POWER_CTRL_DCDC4P2_BO_IRQ, &power_regs->hw_power_ctrl_clr);
writel(POWER_CTRL_ENIRQ_DCDC4P2_BO, &power_regs->hw_power_ctrl_clr);
if (!mx28_is_batt_ready()) {
clrbits_le32(&power_regs->hw_power_dcdc4p2,
POWER_DCDC4P2_BO_MASK);
writel(POWER_CTRL_DCDC4P2_BO_IRQ,
&power_regs->hw_power_ctrl_clr);
writel(POWER_CTRL_ENIRQ_DCDC4P2_BO,
&power_regs->hw_power_ctrl_clr);
}
mx28_power_init_dcdc_4p2_source();
@ -515,6 +520,50 @@ void mx28_powerdown(void)
&power_regs->hw_power_reset);
}
void mx28_batt_boot(void)
{
struct mx28_power_regs *power_regs =
(struct mx28_power_regs *)MXS_POWER_BASE;
clrbits_le32(&power_regs->hw_power_5vctrl, POWER_5VCTRL_PWDN_5VBRNOUT);
clrbits_le32(&power_regs->hw_power_5vctrl, POWER_5VCTRL_ENABLE_DCDC);
clrbits_le32(&power_regs->hw_power_dcdc4p2,
POWER_DCDC4P2_ENABLE_DCDC | POWER_DCDC4P2_ENABLE_4P2);
writel(POWER_CHARGE_ENABLE_LOAD, &power_regs->hw_power_charge_clr);
/* 5V to battery handoff. */
setbits_le32(&power_regs->hw_power_5vctrl, POWER_5VCTRL_DCDC_XFER);
early_delay(30);
clrbits_le32(&power_regs->hw_power_5vctrl, POWER_5VCTRL_DCDC_XFER);
writel(POWER_CTRL_ENIRQ_DCDC4P2_BO, &power_regs->hw_power_ctrl_clr);
clrsetbits_le32(&power_regs->hw_power_minpwr,
POWER_MINPWR_HALFFETS, POWER_MINPWR_DOUBLE_FETS);
mx28_power_set_linreg();
clrbits_le32(&power_regs->hw_power_vdddctrl,
POWER_VDDDCTRL_DISABLE_FET | POWER_VDDDCTRL_ENABLE_LINREG);
clrbits_le32(&power_regs->hw_power_vddactrl,
POWER_VDDACTRL_DISABLE_FET | POWER_VDDACTRL_ENABLE_LINREG);
clrbits_le32(&power_regs->hw_power_vddioctrl,
POWER_VDDIOCTRL_DISABLE_FET);
setbits_le32(&power_regs->hw_power_5vctrl,
POWER_5VCTRL_PWD_CHARGE_4P2_MASK);
setbits_le32(&power_regs->hw_power_5vctrl,
POWER_5VCTRL_ENABLE_DCDC);
clrsetbits_le32(&power_regs->hw_power_5vctrl,
POWER_5VCTRL_CHARGE_4P2_ILIMIT_MASK,
0x8 << POWER_5VCTRL_CHARGE_4P2_ILIMIT_OFFSET);
}
void mx28_handle_5v_conflict(void)
{
struct mx28_power_regs *power_regs =
@ -539,6 +588,11 @@ void mx28_handle_5v_conflict(void)
mx28_powerdown();
break;
}
if (tmp & POWER_STS_PSWITCH_MASK) {
mx28_batt_boot();
break;
}
}
}
@ -595,12 +649,42 @@ void mx28_switch_vddd_to_dcdc_source(void)
void mx28_power_configure_power_source(void)
{
int batt_ready, batt_good;
struct mx28_power_regs *power_regs =
(struct mx28_power_regs *)MXS_POWER_BASE;
struct mx28_lradc_regs *lradc_regs =
(struct mx28_lradc_regs *)MXS_LRADC_BASE;
mx28_src_power_init();
mx28_5v_boot();
batt_ready = mx28_is_batt_ready();
if (readl(&power_regs->hw_power_sts) & POWER_STS_VDD5V_GT_VDDIO) {
batt_good = mx28_is_batt_good();
if (batt_ready) {
/* 5V source detected, good battery detected. */
mx28_batt_boot();
} else {
if (batt_good) {
/* 5V source detected, low battery detceted. */
} else {
/* 5V source detected, bad battery detected. */
writel(LRADC_CONVERSION_AUTOMATIC,
&lradc_regs->hw_lradc_conversion_clr);
clrbits_le32(&power_regs->hw_power_battmonitor,
POWER_BATTMONITOR_BATT_VAL_MASK);
}
mx28_5v_boot();
}
} else {
/* 5V not detected, booting from battery. */
mx28_batt_boot();
}
mx28_power_clock2pll();
mx28_init_batt_bo();
mx28_switch_vddd_to_dcdc_source();
}