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path: root/drivers/mfd/twl4030-power.c
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Diffstat (limited to 'drivers/mfd/twl4030-power.c')
-rw-r--r--drivers/mfd/twl4030-power.c286
1 files changed, 261 insertions, 25 deletions
diff --git a/drivers/mfd/twl4030-power.c b/drivers/mfd/twl4030-power.c
index 96162b62f3c0..3bc969a5916b 100644
--- a/drivers/mfd/twl4030-power.c
+++ b/drivers/mfd/twl4030-power.c
@@ -29,13 +29,21 @@
#include <linux/i2c/twl.h>
#include <linux/platform_device.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <asm/mach-types.h>
static u8 twl4030_start_script_address = 0x2b;
-#define PWR_P1_SW_EVENTS 0x10
-#define PWR_DEVOFF (1 << 0)
+/* Register bits for P1, P2 and P3_SW_EVENTS */
+#define PWR_STOPON_PRWON BIT(6)
+#define PWR_STOPON_SYSEN BIT(5)
+#define PWR_ENABLE_WARMRESET BIT(4)
+#define PWR_LVL_WAKEUP BIT(3)
+#define PWR_DEVACT BIT(2)
+#define PWR_DEVSLP BIT(1)
+#define PWR_DEVOFF BIT(0)
+
#define SEQ_OFFSYNC (1 << 0)
#define PHY_TO_OFF_PM_MASTER(p) (p - 0x36)
@@ -52,10 +60,6 @@ static u8 twl4030_start_script_address = 0x2b;
#define R_CFG_P2_TRANSITION PHY_TO_OFF_PM_MASTER(0x37)
#define R_CFG_P3_TRANSITION PHY_TO_OFF_PM_MASTER(0x38)
-#define LVL_WAKEUP 0x08
-
-#define ENABLE_WARMRESET (1<<4)
-
#define END_OF_SCRIPT 0x3f
#define R_SEQ_ADD_A2S PHY_TO_OFF_PM_MASTER(0x55)
@@ -125,6 +129,53 @@ static u8 res_config_addrs[] = {
[RES_MAIN_REF] = 0x94,
};
+/*
+ * Usable values for .remap_sleep and .remap_off
+ * Based on table "5.3.3 Resource Operating modes"
+ */
+enum {
+ TWL_REMAP_OFF = 0,
+ TWL_REMAP_SLEEP = 8,
+ TWL_REMAP_ACTIVE = 9,
+};
+
+/*
+ * Macros to configure the PM register states for various resources.
+ * Note that we can make MSG_SINGULAR etc private to this driver once
+ * omap3 has been made DT only.
+ */
+#define TWL_DFLT_DELAY 2 /* typically 2 32 KiHz cycles */
+#define TWL_DEV_GRP_P123 (DEV_GRP_P1 | DEV_GRP_P2 | DEV_GRP_P3)
+#define TWL_RESOURCE_SET(res, state) \
+ { MSG_SINGULAR(DEV_GRP_NULL, (res), (state)), TWL_DFLT_DELAY }
+#define TWL_RESOURCE_ON(res) TWL_RESOURCE_SET(res, RES_STATE_ACTIVE)
+#define TWL_RESOURCE_OFF(res) TWL_RESOURCE_SET(res, RES_STATE_OFF)
+#define TWL_RESOURCE_RESET(res) TWL_RESOURCE_SET(res, RES_STATE_WRST)
+/*
+ * It seems that type1 and type2 is just the resource init order
+ * number for the type1 and type2 group.
+ */
+#define TWL_RESOURCE_SET_ACTIVE(res, state) \
+ { MSG_SINGULAR(DEV_GRP_NULL, (res), RES_STATE_ACTIVE), (state) }
+#define TWL_RESOURCE_GROUP_RESET(group, type1, type2) \
+ { MSG_BROADCAST(DEV_GRP_NULL, (group), (type1), (type2), \
+ RES_STATE_WRST), TWL_DFLT_DELAY }
+#define TWL_RESOURCE_GROUP_SLEEP(group, type, type2) \
+ { MSG_BROADCAST(DEV_GRP_NULL, (group), (type), (type2), \
+ RES_STATE_SLEEP), TWL_DFLT_DELAY }
+#define TWL_RESOURCE_GROUP_ACTIVE(group, type, type2) \
+ { MSG_BROADCAST(DEV_GRP_NULL, (group), (type), (type2), \
+ RES_STATE_ACTIVE), TWL_DFLT_DELAY }
+#define TWL_REMAP_SLEEP(res, devgrp, typ, typ2) \
+ { .resource = (res), .devgroup = (devgrp), \
+ .type = (typ), .type2 = (typ2), \
+ .remap_off = TWL_REMAP_OFF, \
+ .remap_sleep = TWL_REMAP_SLEEP, }
+#define TWL_REMAP_OFF(res, devgrp, typ, typ2) \
+ { .resource = (res), .devgroup = (devgrp), \
+ .type = (typ), .type2 = (typ2), \
+ .remap_off = TWL_REMAP_OFF, .remap_sleep = TWL_REMAP_OFF, }
+
static int twl4030_write_script_byte(u8 address, u8 byte)
{
int err;
@@ -196,7 +247,7 @@ static int twl4030_config_wakeup3_sequence(u8 address)
err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data, R_P3_SW_EVENTS);
if (err)
goto out;
- data |= LVL_WAKEUP;
+ data |= PWR_LVL_WAKEUP;
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data, R_P3_SW_EVENTS);
out:
if (err)
@@ -219,7 +270,7 @@ static int twl4030_config_wakeup12_sequence(u8 address)
if (err)
goto out;
- data |= LVL_WAKEUP;
+ data |= PWR_LVL_WAKEUP;
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data, R_P1_SW_EVENTS);
if (err)
goto out;
@@ -228,7 +279,7 @@ static int twl4030_config_wakeup12_sequence(u8 address)
if (err)
goto out;
- data |= LVL_WAKEUP;
+ data |= PWR_LVL_WAKEUP;
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data, R_P2_SW_EVENTS);
if (err)
goto out;
@@ -281,7 +332,7 @@ static int twl4030_config_warmreset_sequence(u8 address)
if (err)
goto out;
- rd_data |= ENABLE_WARMRESET;
+ rd_data |= PWR_ENABLE_WARMRESET;
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, rd_data, R_P1_SW_EVENTS);
if (err)
goto out;
@@ -290,7 +341,7 @@ static int twl4030_config_warmreset_sequence(u8 address)
if (err)
goto out;
- rd_data |= ENABLE_WARMRESET;
+ rd_data |= PWR_ENABLE_WARMRESET;
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, rd_data, R_P2_SW_EVENTS);
if (err)
goto out;
@@ -299,7 +350,7 @@ static int twl4030_config_warmreset_sequence(u8 address)
if (err)
goto out;
- rd_data |= ENABLE_WARMRESET;
+ rd_data |= PWR_ENABLE_WARMRESET;
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, rd_data, R_P3_SW_EVENTS);
out:
if (err)
@@ -421,6 +472,12 @@ static int load_twl4030_script(struct twl4030_script *tscript,
goto out;
}
if (tscript->flags & TWL4030_WAKEUP12_SCRIPT) {
+ /* Reset any existing sleep script to avoid hangs on reboot */
+ err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
+ R_SEQ_ADD_A2S);
+ if (err)
+ goto out;
+
err = twl4030_config_wakeup12_sequence(address);
if (err)
goto out;
@@ -493,7 +550,8 @@ int twl4030_remove_script(u8 flags)
return err;
}
-static int twl4030_power_configure_scripts(struct twl4030_power_data *pdata)
+static int
+twl4030_power_configure_scripts(const struct twl4030_power_data *pdata)
{
int err;
int i;
@@ -509,12 +567,34 @@ static int twl4030_power_configure_scripts(struct twl4030_power_data *pdata)
return 0;
}
-static int twl4030_power_configure_resources(struct twl4030_power_data *pdata)
+static void twl4030_patch_rconfig(struct twl4030_resconfig *common,
+ struct twl4030_resconfig *board)
+{
+ while (common->resource) {
+ struct twl4030_resconfig *b = board;
+
+ while (b->resource) {
+ if (b->resource == common->resource) {
+ *common = *b;
+ break;
+ }
+ b++;
+ }
+ common++;
+ }
+}
+
+static int
+twl4030_power_configure_resources(const struct twl4030_power_data *pdata)
{
struct twl4030_resconfig *resconfig = pdata->resource_config;
+ struct twl4030_resconfig *boardconf = pdata->board_config;
int err;
if (resconfig) {
+ if (boardconf)
+ twl4030_patch_rconfig(resconfig, boardconf);
+
while (resconfig->resource) {
err = twl4030_configure_resource(resconfig);
if (err)
@@ -541,7 +621,7 @@ void twl4030_power_off(void)
pr_err("TWL4030 Unable to power off\n");
}
-static bool twl4030_power_use_poweroff(struct twl4030_power_data *pdata,
+static bool twl4030_power_use_poweroff(const struct twl4030_power_data *pdata,
struct device_node *node)
{
if (pdata && pdata->use_poweroff)
@@ -553,10 +633,170 @@ static bool twl4030_power_use_poweroff(struct twl4030_power_data *pdata,
return false;
}
+#ifdef CONFIG_OF
+
+/* Generic warm reset configuration for omap3 */
+
+static struct twl4030_ins omap3_wrst_seq[] = {
+ TWL_RESOURCE_OFF(RES_NRES_PWRON),
+ TWL_RESOURCE_OFF(RES_RESET),
+ TWL_RESOURCE_RESET(RES_MAIN_REF),
+ TWL_RESOURCE_GROUP_RESET(RES_GRP_ALL, RES_TYPE_R0, RES_TYPE2_R2),
+ TWL_RESOURCE_RESET(RES_VUSB_3V1),
+ TWL_RESOURCE_GROUP_RESET(RES_GRP_ALL, RES_TYPE_R0, RES_TYPE2_R1),
+ TWL_RESOURCE_GROUP_RESET(RES_GRP_RC, RES_TYPE_ALL, RES_TYPE2_R0),
+ TWL_RESOURCE_ON(RES_RESET),
+ TWL_RESOURCE_ON(RES_NRES_PWRON),
+};
+
+static struct twl4030_script omap3_wrst_script = {
+ .script = omap3_wrst_seq,
+ .size = ARRAY_SIZE(omap3_wrst_seq),
+ .flags = TWL4030_WRST_SCRIPT,
+};
+
+static struct twl4030_script *omap3_reset_scripts[] = {
+ &omap3_wrst_script,
+};
+
+static struct twl4030_resconfig omap3_rconfig[] = {
+ TWL_REMAP_SLEEP(RES_HFCLKOUT, DEV_GRP_P3, -1, -1),
+ TWL_REMAP_SLEEP(RES_VDD1, DEV_GRP_P1, -1, -1),
+ TWL_REMAP_SLEEP(RES_VDD2, DEV_GRP_P1, -1, -1),
+ { 0, 0 },
+};
+
+static struct twl4030_power_data omap3_reset = {
+ .scripts = omap3_reset_scripts,
+ .num = ARRAY_SIZE(omap3_reset_scripts),
+ .resource_config = omap3_rconfig,
+};
+
+/* Recommended generic default idle configuration for off-idle */
+
+/* Broadcast message to put res to sleep */
+static struct twl4030_ins omap3_idle_sleep_on_seq[] = {
+ TWL_RESOURCE_GROUP_SLEEP(RES_GRP_ALL, RES_TYPE_ALL, 0),
+};
+
+static struct twl4030_script omap3_idle_sleep_on_script = {
+ .script = omap3_idle_sleep_on_seq,
+ .size = ARRAY_SIZE(omap3_idle_sleep_on_seq),
+ .flags = TWL4030_SLEEP_SCRIPT,
+};
+
+/* Broadcast message to put res to active */
+static struct twl4030_ins omap3_idle_wakeup_p12_seq[] = {
+ TWL_RESOURCE_GROUP_ACTIVE(RES_GRP_ALL, RES_TYPE_ALL, 0),
+};
+
+static struct twl4030_script omap3_idle_wakeup_p12_script = {
+ .script = omap3_idle_wakeup_p12_seq,
+ .size = ARRAY_SIZE(omap3_idle_wakeup_p12_seq),
+ .flags = TWL4030_WAKEUP12_SCRIPT,
+};
+
+/* Broadcast message to put res to active */
+static struct twl4030_ins omap3_idle_wakeup_p3_seq[] = {
+ TWL_RESOURCE_SET_ACTIVE(RES_CLKEN, 0x37),
+ TWL_RESOURCE_GROUP_ACTIVE(RES_GRP_ALL, RES_TYPE_ALL, 0),
+};
+
+static struct twl4030_script omap3_idle_wakeup_p3_script = {
+ .script = omap3_idle_wakeup_p3_seq,
+ .size = ARRAY_SIZE(omap3_idle_wakeup_p3_seq),
+ .flags = TWL4030_WAKEUP3_SCRIPT,
+};
+
+static struct twl4030_script *omap3_idle_scripts[] = {
+ &omap3_idle_wakeup_p12_script,
+ &omap3_idle_wakeup_p3_script,
+ &omap3_wrst_script,
+ &omap3_idle_sleep_on_script,
+};
+
+/*
+ * Recommended configuration based on "Recommended Sleep
+ * Sequences for the Zoom Platform":
+ * http://omappedia.com/wiki/File:Recommended_Sleep_Sequences_Zoom.pdf
+ * Note that the type1 and type2 seem to be just the init order number
+ * for type1 and type2 groups as specified in the document mentioned
+ * above.
+ */
+static struct twl4030_resconfig omap3_idle_rconfig[] = {
+ TWL_REMAP_SLEEP(RES_VAUX1, DEV_GRP_NULL, 0, 0),
+ TWL_REMAP_SLEEP(RES_VAUX2, DEV_GRP_NULL, 0, 0),
+ TWL_REMAP_SLEEP(RES_VAUX3, DEV_GRP_NULL, 0, 0),
+ TWL_REMAP_SLEEP(RES_VAUX4, DEV_GRP_NULL, 0, 0),
+ TWL_REMAP_SLEEP(RES_VMMC1, DEV_GRP_NULL, 0, 0),
+ TWL_REMAP_SLEEP(RES_VMMC2, DEV_GRP_NULL, 0, 0),
+ TWL_REMAP_OFF(RES_VPLL1, DEV_GRP_P1, 3, 1),
+ TWL_REMAP_SLEEP(RES_VPLL2, DEV_GRP_P1, 0, 0),
+ TWL_REMAP_SLEEP(RES_VSIM, DEV_GRP_NULL, 0, 0),
+ TWL_REMAP_SLEEP(RES_VDAC, DEV_GRP_NULL, 0, 0),
+ TWL_REMAP_SLEEP(RES_VINTANA1, TWL_DEV_GRP_P123, 1, 2),
+ TWL_REMAP_SLEEP(RES_VINTANA2, TWL_DEV_GRP_P123, 0, 2),
+ TWL_REMAP_SLEEP(RES_VINTDIG, TWL_DEV_GRP_P123, 1, 2),
+ TWL_REMAP_SLEEP(RES_VIO, TWL_DEV_GRP_P123, 2, 2),
+ TWL_REMAP_OFF(RES_VDD1, DEV_GRP_P1, 4, 1),
+ TWL_REMAP_OFF(RES_VDD2, DEV_GRP_P1, 3, 1),
+ TWL_REMAP_SLEEP(RES_VUSB_1V5, DEV_GRP_NULL, 0, 0),
+ TWL_REMAP_SLEEP(RES_VUSB_1V8, DEV_GRP_NULL, 0, 0),
+ TWL_REMAP_SLEEP(RES_VUSB_3V1, TWL_DEV_GRP_P123, 0, 0),
+ /* Resource #20 USB charge pump skipped */
+ TWL_REMAP_SLEEP(RES_REGEN, TWL_DEV_GRP_P123, 2, 1),
+ TWL_REMAP_SLEEP(RES_NRES_PWRON, TWL_DEV_GRP_P123, 0, 1),
+ TWL_REMAP_SLEEP(RES_CLKEN, TWL_DEV_GRP_P123, 3, 2),
+ TWL_REMAP_SLEEP(RES_SYSEN, TWL_DEV_GRP_P123, 6, 1),
+ TWL_REMAP_SLEEP(RES_HFCLKOUT, DEV_GRP_P3, 0, 2),
+ TWL_REMAP_SLEEP(RES_32KCLKOUT, TWL_DEV_GRP_P123, 0, 0),
+ TWL_REMAP_SLEEP(RES_RESET, TWL_DEV_GRP_P123, 6, 0),
+ TWL_REMAP_SLEEP(RES_MAIN_REF, TWL_DEV_GRP_P123, 0, 0),
+ { /* Terminator */ },
+};
+
+static struct twl4030_power_data omap3_idle = {
+ .scripts = omap3_idle_scripts,
+ .num = ARRAY_SIZE(omap3_idle_scripts),
+ .resource_config = omap3_idle_rconfig,
+};
+
+/* Disable 32 KiHz oscillator during idle */
+static struct twl4030_resconfig osc_off_rconfig[] = {
+ TWL_REMAP_OFF(RES_CLKEN, DEV_GRP_P1 | DEV_GRP_P3, 3, 2),
+ { /* Terminator */ },
+};
+
+static struct twl4030_power_data osc_off_idle = {
+ .scripts = omap3_idle_scripts,
+ .num = ARRAY_SIZE(omap3_idle_scripts),
+ .resource_config = omap3_idle_rconfig,
+ .board_config = osc_off_rconfig,
+};
+
+static struct of_device_id twl4030_power_of_match[] = {
+ {
+ .compatible = "ti,twl4030-power-reset",
+ .data = &omap3_reset,
+ },
+ {
+ .compatible = "ti,twl4030-power-idle",
+ .data = &omap3_idle,
+ },
+ {
+ .compatible = "ti,twl4030-power-idle-osc-off",
+ .data = &osc_off_idle,
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, twl4030_power_of_match);
+#endif /* CONFIG_OF */
+
static int twl4030_power_probe(struct platform_device *pdev)
{
- struct twl4030_power_data *pdata = dev_get_platdata(&pdev->dev);
+ const struct twl4030_power_data *pdata = dev_get_platdata(&pdev->dev);
struct device_node *node = pdev->dev.of_node;
+ const struct of_device_id *match;
int err = 0;
int err2 = 0;
u8 val;
@@ -577,8 +817,12 @@ static int twl4030_power_probe(struct platform_device *pdev)
return err;
}
+ match = of_match_device(of_match_ptr(twl4030_power_of_match),
+ &pdev->dev);
+ if (match && match->data)
+ pdata = match->data;
+
if (pdata) {
- /* TODO: convert to device tree */
err = twl4030_power_configure_scripts(pdata);
if (err) {
pr_err("TWL4030 failed to load scripts\n");
@@ -628,14 +872,6 @@ static int twl4030_power_remove(struct platform_device *pdev)
return 0;
}
-#ifdef CONFIG_OF
-static const struct of_device_id twl4030_power_of_match[] = {
- {.compatible = "ti,twl4030-power", },
- { },
-};
-MODULE_DEVICE_TABLE(of, twl4030_power_of_match);
-#endif
-
static struct platform_driver twl4030_power_driver = {
.driver = {
.name = "twl4030_power",
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-27 05:43:12 +0000