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path: root/drivers/regulator/ti-abb-regulator.c
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Diffstat (limited to 'drivers/regulator/ti-abb-regulator.c')
-rw-r--r--drivers/regulator/ti-abb-regulator.c140
1 files changed, 80 insertions, 60 deletions
diff --git a/drivers/regulator/ti-abb-regulator.c b/drivers/regulator/ti-abb-regulator.c
index b187b6bba7ad..a2dabb575b97 100644
--- a/drivers/regulator/ti-abb-regulator.c
+++ b/drivers/regulator/ti-abb-regulator.c
@@ -54,8 +54,8 @@ struct ti_abb_info {
/**
* struct ti_abb_reg - Register description for ABB block
- * @setup_reg: setup register offset from base
- * @control_reg: control register offset from base
+ * @setup_off: setup register offset from base
+ * @control_off: control register offset from base
* @sr2_wtcnt_value_mask: setup register- sr2_wtcnt_value mask
* @fbb_sel_mask: setup register- FBB sel mask
* @rbb_sel_mask: setup register- RBB sel mask
@@ -64,8 +64,8 @@ struct ti_abb_info {
* @opp_sel_mask: control register - mask for mode to operate
*/
struct ti_abb_reg {
- u32 setup_reg;
- u32 control_reg;
+ u32 setup_off;
+ u32 control_off;
/* Setup register fields */
u32 sr2_wtcnt_value_mask;
@@ -83,6 +83,8 @@ struct ti_abb_reg {
* @rdesc: regulator descriptor
* @clk: clock(usually sysclk) supplying ABB block
* @base: base address of ABB block
+ * @setup_reg: setup register of ABB block
+ * @control_reg: control register of ABB block
* @int_base: interrupt register base address
* @efuse_base: (optional) efuse base address for ABB modes
* @ldo_base: (optional) LDOVBB vset override base address
@@ -99,6 +101,8 @@ struct ti_abb {
struct regulator_desc rdesc;
struct clk *clk;
void __iomem *base;
+ void __iomem *setup_reg;
+ void __iomem *control_reg;
void __iomem *int_base;
void __iomem *efuse_base;
void __iomem *ldo_base;
@@ -118,20 +122,18 @@ struct ti_abb {
* ti_abb_rmw() - handy wrapper to set specific register bits
* @mask: mask for register field
* @value: value shifted to mask location and written
- * @offset: offset of register
- * @base: base address
+ * @reg: register address
*
* Return: final register value (may be unused)
*/
-static inline u32 ti_abb_rmw(u32 mask, u32 value, u32 offset,
- void __iomem *base)
+static inline u32 ti_abb_rmw(u32 mask, u32 value, void __iomem *reg)
{
u32 val;
- val = readl(base + offset);
+ val = readl(reg);
val &= ~mask;
val |= (value << __ffs(mask)) & mask;
- writel(val, base + offset);
+ writel(val, reg);
return val;
}
@@ -263,21 +265,19 @@ static int ti_abb_set_opp(struct regulator_dev *rdev, struct ti_abb *abb,
if (ret)
goto out;
- ti_abb_rmw(regs->fbb_sel_mask | regs->rbb_sel_mask, 0, regs->setup_reg,
- abb->base);
+ ti_abb_rmw(regs->fbb_sel_mask | regs->rbb_sel_mask, 0, abb->setup_reg);
switch (info->opp_sel) {
case TI_ABB_SLOW_OPP:
- ti_abb_rmw(regs->rbb_sel_mask, 1, regs->setup_reg, abb->base);
+ ti_abb_rmw(regs->rbb_sel_mask, 1, abb->setup_reg);
break;
case TI_ABB_FAST_OPP:
- ti_abb_rmw(regs->fbb_sel_mask, 1, regs->setup_reg, abb->base);
+ ti_abb_rmw(regs->fbb_sel_mask, 1, abb->setup_reg);
break;
}
/* program next state of ABB ldo */
- ti_abb_rmw(regs->opp_sel_mask, info->opp_sel, regs->control_reg,
- abb->base);
+ ti_abb_rmw(regs->opp_sel_mask, info->opp_sel, abb->control_reg);
/*
* program LDO VBB vset override if needed for !bypass mode
@@ -288,7 +288,7 @@ static int ti_abb_set_opp(struct regulator_dev *rdev, struct ti_abb *abb,
ti_abb_program_ldovbb(dev, abb, info);
/* Initiate ABB ldo change */
- ti_abb_rmw(regs->opp_change_mask, 1, regs->control_reg, abb->base);
+ ti_abb_rmw(regs->opp_change_mask, 1, abb->control_reg);
/* Wait for ABB LDO to complete transition to new Bias setting */
ret = ti_abb_wait_txdone(dev, abb);
@@ -490,8 +490,7 @@ static int ti_abb_init_timings(struct device *dev, struct ti_abb *abb)
dev_dbg(dev, "%s: Clk_rate=%ld, sr2_cnt=0x%08x\n", __func__,
clk_get_rate(abb->clk), sr2_wt_cnt_val);
- ti_abb_rmw(regs->sr2_wtcnt_value_mask, sr2_wt_cnt_val, regs->setup_reg,
- abb->base);
+ ti_abb_rmw(regs->sr2_wtcnt_value_mask, sr2_wt_cnt_val, abb->setup_reg);
return 0;
}
@@ -508,32 +507,24 @@ static int ti_abb_init_table(struct device *dev, struct ti_abb *abb,
struct regulator_init_data *rinit_data)
{
struct ti_abb_info *info;
- const struct property *prop;
- const __be32 *abb_info;
const u32 num_values = 6;
char *pname = "ti,abb_info";
- u32 num_entries, i;
+ u32 i;
unsigned int *volt_table;
- int min_uV = INT_MAX, max_uV = 0;
+ int num_entries, min_uV = INT_MAX, max_uV = 0;
struct regulation_constraints *c = &rinit_data->constraints;
- prop = of_find_property(dev->of_node, pname, NULL);
- if (!prop) {
- dev_err(dev, "No '%s' property?\n", pname);
- return -ENODEV;
- }
-
- if (!prop->value) {
- dev_err(dev, "Empty '%s' property?\n", pname);
- return -ENODATA;
- }
-
/*
* Each abb_info is a set of n-tuple, where n is num_values, consisting
* of voltage and a set of detection logic for ABB information for that
* voltage to apply.
*/
- num_entries = prop->length / sizeof(u32);
+ num_entries = of_property_count_u32_elems(dev->of_node, pname);
+ if (num_entries < 0) {
+ dev_err(dev, "No '%s' property?\n", pname);
+ return num_entries;
+ }
+
if (!num_entries || (num_entries % num_values)) {
dev_err(dev, "All '%s' list entries need %d vals\n", pname,
num_values);
@@ -542,38 +533,38 @@ static int ti_abb_init_table(struct device *dev, struct ti_abb *abb,
num_entries /= num_values;
info = devm_kzalloc(dev, sizeof(*info) * num_entries, GFP_KERNEL);
- if (!info) {
- dev_err(dev, "Can't allocate info table for '%s' property\n",
- pname);
+ if (!info)
return -ENOMEM;
- }
+
abb->info = info;
volt_table = devm_kzalloc(dev, sizeof(unsigned int) * num_entries,
GFP_KERNEL);
- if (!volt_table) {
- dev_err(dev, "Can't allocate voltage table for '%s' property\n",
- pname);
+ if (!volt_table)
return -ENOMEM;
- }
abb->rdesc.n_voltages = num_entries;
abb->rdesc.volt_table = volt_table;
/* We do not know where the OPP voltage is at the moment */
abb->current_info_idx = -EINVAL;
- abb_info = prop->value;
for (i = 0; i < num_entries; i++, info++, volt_table++) {
u32 efuse_offset, rbb_mask, fbb_mask, vset_mask;
u32 efuse_val;
/* NOTE: num_values should equal to entries picked up here */
- *volt_table = be32_to_cpup(abb_info++);
- info->opp_sel = be32_to_cpup(abb_info++);
- efuse_offset = be32_to_cpup(abb_info++);
- rbb_mask = be32_to_cpup(abb_info++);
- fbb_mask = be32_to_cpup(abb_info++);
- vset_mask = be32_to_cpup(abb_info++);
+ of_property_read_u32_index(dev->of_node, pname, i * num_values,
+ volt_table);
+ of_property_read_u32_index(dev->of_node, pname,
+ i * num_values + 1, &info->opp_sel);
+ of_property_read_u32_index(dev->of_node, pname,
+ i * num_values + 2, &efuse_offset);
+ of_property_read_u32_index(dev->of_node, pname,
+ i * num_values + 3, &rbb_mask);
+ of_property_read_u32_index(dev->of_node, pname,
+ i * num_values + 4, &fbb_mask);
+ of_property_read_u32_index(dev->of_node, pname,
+ i * num_values + 5, &vset_mask);
dev_dbg(dev,
"[%d]v=%d ABB=%d ef=0x%x rbb=0x%x fbb=0x%x vset=0x%x\n",
@@ -648,8 +639,8 @@ static struct regulator_ops ti_abb_reg_ops = {
/* Default ABB block offsets, IF this changes in future, create new one */
static const struct ti_abb_reg abb_regs_v1 = {
/* WARNING: registers are wrongly documented in TRM */
- .setup_reg = 0x04,
- .control_reg = 0x00,
+ .setup_off = 0x04,
+ .control_off = 0x00,
.sr2_wtcnt_value_mask = (0xff << 8),
.fbb_sel_mask = (0x01 << 2),
@@ -661,8 +652,8 @@ static const struct ti_abb_reg abb_regs_v1 = {
};
static const struct ti_abb_reg abb_regs_v2 = {
- .setup_reg = 0x00,
- .control_reg = 0x04,
+ .setup_off = 0x00,
+ .control_off = 0x04,
.sr2_wtcnt_value_mask = (0xff << 8),
.fbb_sel_mask = (0x01 << 2),
@@ -673,9 +664,20 @@ static const struct ti_abb_reg abb_regs_v2 = {
.opp_sel_mask = (0x03 << 0),
};
+static const struct ti_abb_reg abb_regs_generic = {
+ .sr2_wtcnt_value_mask = (0xff << 8),
+ .fbb_sel_mask = (0x01 << 2),
+ .rbb_sel_mask = (0x01 << 1),
+ .sr2_en_mask = (0x01 << 0),
+
+ .opp_change_mask = (0x01 << 2),
+ .opp_sel_mask = (0x03 << 0),
+};
+
static const struct of_device_id ti_abb_of_match[] = {
{.compatible = "ti,abb-v1", .data = &abb_regs_v1},
{.compatible = "ti,abb-v2", .data = &abb_regs_v2},
+ {.compatible = "ti,abb-v3", .data = &abb_regs_generic},
{ },
};
@@ -722,11 +724,29 @@ static int ti_abb_probe(struct platform_device *pdev)
abb->regs = match->data;
/* Map ABB resources */
- pname = "base-address";
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname);
- abb->base = devm_ioremap_resource(dev, res);
- if (IS_ERR(abb->base))
- return PTR_ERR(abb->base);
+ if (abb->regs->setup_off || abb->regs->control_off) {
+ pname = "base-address";
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname);
+ abb->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(abb->base))
+ return PTR_ERR(abb->base);
+
+ abb->setup_reg = abb->base + abb->regs->setup_off;
+ abb->control_reg = abb->base + abb->regs->control_off;
+
+ } else {
+ pname = "control-address";
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname);
+ abb->control_reg = devm_ioremap_resource(dev, res);
+ if (IS_ERR(abb->control_reg))
+ return PTR_ERR(abb->control_reg);
+
+ pname = "setup-address";
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname);
+ abb->setup_reg = devm_ioremap_resource(dev, res);
+ if (IS_ERR(abb->setup_reg))
+ return PTR_ERR(abb->setup_reg);
+ }
pname = "int-address";
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname);
@@ -860,7 +880,7 @@ skip_opt:
platform_set_drvdata(pdev, rdev);
/* Enable the ldo if not already done by bootloader */
- ti_abb_rmw(abb->regs->sr2_en_mask, 1, abb->regs->setup_reg, abb->base);
+ ti_abb_rmw(abb->regs->sr2_en_mask, 1, abb->setup_reg);
return 0;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.