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authorLubomir Popov <lpopov@mm-sol.com>2013-06-06 04:16:40 +0000
committerTom Rini <trini@ti.com>2013-06-10 08:43:10 -0400
commite9090fa45a3d537edac0a7eecae75c9a4e75ec86 (patch)
treebbbba373e28549e8ee67987083eeec3e3c2e7b4d /drivers/power
parent92b0482c17acf92f94ac74fd8536fd95d5b64b5e (diff)
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ARM: OMAP5: Power: Add more functionality to Palmas driver
Add some useful functions, and the corresponding definitions. Add support for powering on the dra7xx_evm SD/MMC LDO (courtesy Lokesh Vutla <lokeshvutla@ti.com>). Signed-off-by: Lubomir Popov <lpopov@mm-sol.com> Reviewed-by: Tom Rini <trini@ti.com>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/palmas.c133
1 files changed, 121 insertions, 12 deletions
diff --git a/drivers/power/palmas.c b/drivers/power/palmas.c
index 09c832d..2d275a7 100644
--- a/drivers/power/palmas.c
+++ b/drivers/power/palmas.c
@@ -25,28 +25,137 @@
void palmas_init_settings(void)
{
- return;
+#ifdef CONFIG_PALMAS_SMPS7_FPWM
+ int err;
+ /*
+ * Set SMPS7 (1.8 V I/O supply on platforms with TWL6035/37) to
+ * forced PWM mode. This reduces noise (but affects efficiency).
+ */
+ u8 val = SMPS_MODE_SLP_FPWM | SMPS_MODE_ACT_FPWM;
+ err = palmas_i2c_write_u8(TWL603X_CHIP_P1, SMPS7_CTRL, val);
+ if (err)
+ printf("palmas: could not force PWM for SMPS7: err = %d\n",
+ err);
+#endif
}
int palmas_mmc1_poweron_ldo(void)
{
u8 val = 0;
- /* set LDO9 TWL6035 to 3V */
- val = 0x2b; /* (3 -.9)*28 +1 */
-
- if (palmas_i2c_write_u8(0x48, LDO9_VOLTAGE, val)) {
- printf("twl6035: could not set LDO9 voltage.\n");
+#if defined(CONFIG_DRA7XX)
+ /*
+ * Currently valid for the dra7xx_evm board:
+ * Set TPS659038 LDO1 to 3.0 V
+ */
+ val = LDO_VOLT_3V0;
+ if (palmas_i2c_write_u8(TPS65903X_CHIP_P1, LDO1_VOLTAGE, val)) {
+ printf("tps65903x: could not set LDO1 voltage.\n");
+ return 1;
+ }
+ /* TURN ON LDO1 */
+ val = RSC_MODE_SLEEP | RSC_MODE_ACTIVE;
+ if (palmas_i2c_write_u8(TPS65903X_CHIP_P1, LDO1_CTRL, val)) {
+ printf("tps65903x: could not turn on LDO1.\n");
return 1;
}
+ return 0;
+#else
+ /*
+ * We assume that this is a OMAP543X + TWL603X board:
+ * Set TWL6035/37 LDO9 to 3.0 V
+ */
+ val = LDO_VOLT_3V0;
+ return twl603x_mmc1_set_ldo9(val);
+#endif
+}
- /* TURN ON LDO9 */
- val = LDO_ON | LDO_MODE_SLEEP | LDO_MODE_ACTIVE;
+/*
+ * On some OMAP5 + TWL603X hardware the SD card socket and LDO9_IN are
+ * powered by an external 3.3 V regulator, while the output of LDO9
+ * supplies VDDS_SDCARD for the OMAP5 interface only. This implies that
+ * LDO9 could be set to 'bypass' mode when required (e.g. for 3.3 V cards).
+ */
+int twl603x_mmc1_set_ldo9(u8 vsel)
+{
+ u8 cval = 0, vval = 0; /* Off by default */
+ int err;
- if (palmas_i2c_write_u8(0x48, LDO9_CTRL, val)) {
- printf("twl6035: could not turn on LDO9.\n");
- return 1;
+ if (vsel) {
+ /* Turn on */
+ if (vsel > LDO_VOLT_3V3) {
+ /* Put LDO9 in bypass */
+ cval = LDO9_BYP_EN | RSC_MODE_SLEEP | RSC_MODE_ACTIVE;
+ vval = LDO_VOLT_3V3;
+ } else {
+ cval = RSC_MODE_SLEEP | RSC_MODE_ACTIVE;
+ vval = vsel & 0x3f;
+ }
+ }
+ err = palmas_i2c_write_u8(TWL603X_CHIP_P1, LDO9_VOLTAGE, vval);
+ if (err) {
+ printf("twl603x: could not set LDO9 %s: err = %d\n",
+ vsel > LDO_VOLT_3V3 ? "bypass" : "voltage", err);
+ return err;
}
+ err = palmas_i2c_write_u8(TWL603X_CHIP_P1, LDO9_CTRL, cval);
+ if (err)
+ printf("twl603x: could not turn %s LDO9: err = %d\n",
+ cval ? "on" : "off", err);
+ return err;
+}
- return 0;
+#ifdef CONFIG_PALMAS_AUDPWR
+/*
+ * Turn audio codec power and 32 kHz clock on/off. Use for
+ * testing OMAP543X + TWL603X + TWL604X boards only.
+ */
+int twl603x_audio_power(u8 on)
+{
+ u8 cval = 0, vval = 0, c32k = 0;
+ int err;
+
+ if (on) {
+ vval = SMPS_VOLT_2V1;
+ cval = SMPS_MODE_SLP_AUTO | SMPS_MODE_ACT_AUTO;
+ c32k = RSC_MODE_SLEEP | RSC_MODE_ACTIVE;
+ }
+ /* Set SMPS9 to 2.1 V (for TWL604x), or to 0 (off) */
+ err = palmas_i2c_write_u8(TWL603X_CHIP_P1, SMPS9_VOLTAGE, vval);
+ if (err) {
+ printf("twl603x: could not set SMPS9 voltage: err = %d\n",
+ err);
+ return err;
+ }
+ /* Turn on or off SMPS9 */
+ err = palmas_i2c_write_u8(TWL603X_CHIP_P1, SMPS9_CTRL, cval);
+ if (err) {
+ printf("twl603x: could not turn SMPS9 %s: err = %d\n",
+ cval ? "on" : "off", err);
+ return err;
+ }
+ /* Output 32 kHz clock on or off */
+ err = palmas_i2c_write_u8(TWL603X_CHIP_P1, CLK32KGAUDIO_CTRL, c32k);
+ if (err)
+ printf("twl603x: could not turn CLK32KGAUDIO %s: err = %d\n",
+ c32k ? "on" : "off", err);
+ return err;
+}
+#endif
+
+/*
+ * Enable/disable back-up battery (or super cap) charging on TWL6035/37.
+ * Please use defined BB_xxx values.
+ */
+int twl603x_enable_bb_charge(u8 bb_fields)
+{
+ u8 val = bb_fields & 0x0f;
+ int err;
+
+ val |= (VRTC_EN_SLP | VRTC_EN_OFF | VRTC_PWEN);
+ err = palmas_i2c_write_u8(TWL603X_CHIP_P1, BB_VRTC_CTRL, val);
+ if (err)
+ printf("twl603x: could not set BB_VRTC_CTRL to 0x%02x: err = %d\n",
+ val, err);
+ return err;
}