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authorFabio Estevam <fabio.estevam@freescale.com>2013-12-26 14:51:33 -0200
committerStefano Babic <sbabic@denx.de>2014-01-02 17:16:51 +0100
commit3d622b78bdd6832f6fa8599aaf31de541bf04ea8 (patch)
tree5c0284c0779c5dba0975ade6ab4f9fb67695f441 /arch/arm
parent7e5e8c94a9dd6654285aff96e0ff45a353ed79fa (diff)
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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')
-rw-r--r--arch/arm/cpu/armv7/mx6/soc.c33
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 3e095aa..d8ccf3a 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 */