diff options
| author | Fabio Estevam <fabio.estevam@freescale.com> | 2013-12-26 14:51:33 -0200 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2014-01-02 17:16:51 +0100 |
| commit | 3d622b78bdd6832f6fa8599aaf31de541bf04ea8 (patch) | |
| tree | 5c0284c0779c5dba0975ade6ab4f9fb67695f441 /arch/arm/cpu | |
| parent | 7e5e8c94a9dd6654285aff96e0ff45a353ed79fa (diff) | |
mx6: soc: Introduce set_ldo_voltage()
Introduce set_ldo_voltage() so that all three LDO regulators can be configured.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Diffstat (limited to 'arch/arm/cpu')
| -rw-r--r-- | arch/arm/cpu/armv7/mx6/soc.c | 33 |
1 files changed, 26 insertions, 7 deletions
diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c index 3e095aab84..d8ccf3a18a 100644 --- a/arch/arm/cpu/armv7/mx6/soc.c +++ b/arch/arm/cpu/armv7/mx6/soc.c @@ -19,6 +19,12 @@ #include <asm/arch/mxc_hdmi.h> #include <asm/arch/crm_regs.h> +enum ldo_reg { + LDO_ARM, + LDO_SOC, + LDO_PU, +}; + struct scu_regs { u32 ctrl; u32 config; @@ -115,10 +121,11 @@ static void clear_ldo_ramp(void) * Possible values are from 0.725V to 1.450V in steps of * 0.025V (25mV). */ -static void set_vddsoc(u32 mv) +static int set_ldo_voltage(enum ldo_reg ldo, u32 mv) { struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR; u32 val, reg = readl(&anatop->reg_core); + u8 shift; if (mv < 725) val = 0x00; /* Power gated off */ @@ -129,12 +136,24 @@ static void set_vddsoc(u32 mv) clear_ldo_ramp(); - /* - * Mask out the REG_CORE[22:18] bits (REG2_TRIG) - * and set them to the calculated value (0.7V + val * 0.25V) - */ - reg = (reg & ~(0x1F << 18)) | (val << 18); + switch (ldo) { + case LDO_SOC: + shift = 18; + break; + case LDO_PU: + shift = 9; + break; + case LDO_ARM: + shift = 0; + break; + default: + return -EINVAL; + } + + reg = (reg & ~(0x1F << shift)) | (val << shift); writel(reg, &anatop->reg_core); + + return 0; } static void imx_set_wdog_powerdown(bool enable) @@ -151,7 +170,7 @@ int arch_cpu_init(void) { init_aips(); - set_vddsoc(1175); /* Set VDDSOC to 1.175V */ + set_ldo_voltage(LDO_SOC, 1175); /* Set VDDSOC to 1.175V */ imx_set_wdog_powerdown(false); /* Disable PDE bit of WMCR register */ |