[PATCH v7 1/6] soc: qcom: cpr: Move common functions to new file

From: AngeloGioacchino Del Regno
Date: Wed Sep 01 2021 - 11:57:45 EST

In preparation for implementing a new driver that will be handling
CPRv3, CPRv4 and CPR-Hardened, format out common functions to a new
file.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxxx>
---
drivers/soc/qcom/Makefile | 2 +-
drivers/soc/qcom/cpr-common.c | 362 ++++++++++++++++++++++++++++++
drivers/soc/qcom/cpr-common.h | 111 ++++++++++
drivers/soc/qcom/cpr.c | 399 ++--------------------------------
4 files changed, 497 insertions(+), 377 deletions(-)
create mode 100644 drivers/soc/qcom/cpr-common.c
create mode 100644 drivers/soc/qcom/cpr-common.h

diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile
index ad675a6593d0..8d1262a2e23c 100644
--- a/drivers/soc/qcom/Makefile
+++ b/drivers/soc/qcom/Makefile
@@ -3,7 +3,7 @@ CFLAGS_rpmh-rsc.o := -I$(src)
obj-$(CONFIG_QCOM_AOSS_QMP) += qcom_aoss.o
obj-$(CONFIG_QCOM_GENI_SE) += qcom-geni-se.o
obj-$(CONFIG_QCOM_COMMAND_DB) += cmd-db.o
-obj-$(CONFIG_QCOM_CPR) += cpr.o
+obj-$(CONFIG_QCOM_CPR) += cpr-common.o cpr.o
obj-$(CONFIG_QCOM_GSBI) += qcom_gsbi.o
obj-$(CONFIG_QCOM_MDT_LOADER) += mdt_loader.o
obj-$(CONFIG_QCOM_OCMEM) += ocmem.o
diff --git a/drivers/soc/qcom/cpr-common.c b/drivers/soc/qcom/cpr-common.c
new file mode 100644
index 000000000000..41fcc5863e72
--- /dev/null
+++ b/drivers/soc/qcom/cpr-common.c
@@ -0,0 +1,362 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2019, Linaro Limited
+ */
+
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/debugfs.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/bitops.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_opp.h>
+#include <linux/interrupt.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regulator/consumer.h>
+#include <linux/clk.h>
+#include <linux/nvmem-consumer.h>
+#include "cpr-common.h"
+
+int cpr_populate_ring_osc_idx(struct device *dev,
+ struct fuse_corner *fuse_corner,
+ const struct cpr_fuse *cpr_fuse,
+ int num_fuse_corners)
+{
+ struct fuse_corner *end = fuse_corner + num_fuse_corners;
+ u32 data;
+ int ret;
+
+ for (; fuse_corner < end; fuse_corner++, cpr_fuse++) {
+ ret = nvmem_cell_read_variable_le_u32(dev, cpr_fuse->ring_osc, &data);
+ if (ret)
+ return ret;
+ fuse_corner->ring_osc_idx = data;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cpr_populate_ring_osc_idx);
+
+int cpr_read_fuse_uV(int init_v_width, int step_size_uV, int ref_uV,
+ int adj, int step_volt, const char *init_v_efuse,
+ struct device *dev)
+{
+ int steps, uV;
+ u32 bits = 0;
+ int ret;
+
+ ret = nvmem_cell_read_variable_le_u32(dev, init_v_efuse, &bits);
+ if (ret)
+ return ret;
+
+ steps = bits & (BIT(init_v_width - 1) - 1);
+ /* Not two's complement.. instead highest bit is sign bit */
+ if (bits & BIT(init_v_width - 1))
+ steps = -steps;
+
+ uV = ref_uV + steps * step_size_uV;
+
+ /* Apply open-loop fixed adjustments to fused values */
+ uV += adj;
+
+ return DIV_ROUND_UP(uV, step_volt) * step_volt;
+}
+EXPORT_SYMBOL_GPL(cpr_read_fuse_uV);
+
+const struct cpr_fuse *cpr_get_fuses(struct device *dev, int tid,
+ int num_fuse_corners)
+{
+ struct cpr_fuse *fuses;
+ int i;
+
+ fuses = devm_kcalloc(dev, num_fuse_corners,
+ sizeof(struct cpr_fuse),
+ GFP_KERNEL);
+ if (!fuses)
+ return ERR_PTR(-ENOMEM);
+
+ for (i = 0; i < num_fuse_corners; i++) {
+ char tbuf[50];
+
+ snprintf(tbuf, sizeof(tbuf), "cpr%d_ring_osc%d", tid, i + 1);
+ fuses[i].ring_osc = devm_kstrdup(dev, tbuf, GFP_KERNEL);
+ if (!fuses[i].ring_osc)
+ return ERR_PTR(-ENOMEM);
+
+ snprintf(tbuf, sizeof(tbuf),
+ "cpr%d_init_voltage%d", tid, i + 1);
+ fuses[i].init_voltage = devm_kstrdup(dev, tbuf,
+ GFP_KERNEL);
+ if (!fuses[i].init_voltage)
+ return ERR_PTR(-ENOMEM);
+
+ snprintf(tbuf, sizeof(tbuf), "cpr%d_quotient%d", tid, i + 1);
+ fuses[i].quotient = devm_kstrdup(dev, tbuf, GFP_KERNEL);
+ if (!fuses[i].quotient)
+ return ERR_PTR(-ENOMEM);
+
+ snprintf(tbuf, sizeof(tbuf),
+ "cpr%d_quotient_offset%d", tid, i + 1);
+ fuses[i].quotient_offset = devm_kstrdup(dev, tbuf,
+ GFP_KERNEL);
+ if (!fuses[i].quotient_offset)
+ return ERR_PTR(-ENOMEM);
+ }
+
+ return fuses;
+}
+EXPORT_SYMBOL_GPL(cpr_get_fuses);
+
+int cpr_populate_fuse_common(struct device *dev,
+ struct fuse_corner_data *fdata,
+ const struct cpr_fuse *cpr_fuse,
+ struct fuse_corner *fuse_corner,
+ int step_volt, int init_v_width,
+ int init_v_step)
+{
+ int uV, ret;
+
+ /* Populate uV */
+ uV = cpr_read_fuse_uV(init_v_width, init_v_step,
+ fdata->ref_uV, fdata->volt_oloop_adjust,
+ step_volt, cpr_fuse->init_voltage, dev);
+ if (uV < 0)
+ return uV;
+
+ /*
+ * Update SoC voltages: platforms might choose a different
+ * regulators than the one used to characterize the algorithms
+ * (ie, init_voltage_step).
+ */
+ fdata->min_uV = roundup(fdata->min_uV, step_volt);
+ fdata->max_uV = roundup(fdata->max_uV, step_volt);
+
+ fuse_corner->min_uV = fdata->min_uV;
+ fuse_corner->max_uV = fdata->max_uV;
+ fuse_corner->uV = clamp(uV, fuse_corner->min_uV, fuse_corner->max_uV);
+
+ /* Populate target quotient by scaling */
+ ret = nvmem_cell_read_variable_le_u32(dev, cpr_fuse->quotient, &fuse_corner->quot);
+ if (ret)
+ return ret;
+
+ fuse_corner->quot *= fdata->quot_scale;
+ fuse_corner->quot += fdata->quot_offset;
+ fuse_corner->quot += fdata->quot_adjust;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cpr_populate_fuse_common);
+
+/*
+ * Returns: Index of the initial corner or negative number for error.
+ */
+int cpr_find_initial_corner(struct device *dev, struct clk *cpu_clk,
+ struct corner *corners, int num_corners)
+{
+ unsigned long rate;
+ struct corner *iter, *corner;
+ const struct corner *end;
+ unsigned int ret = 0;
+
+ if (!cpu_clk)
+ return -EINVAL;
+
+ end = &corners[num_corners - 1];
+ rate = clk_get_rate(cpu_clk);
+
+ /*
+ * Some bootloaders set a CPU clock frequency that is not defined
+ * in the OPP table. When running at an unlisted frequency,
+ * cpufreq_online() will change to the OPP which has the lowest
+ * frequency, at or above the unlisted frequency.
+ * Since cpufreq_online() always "rounds up" in the case of an
+ * unlisted frequency, this function always "rounds down" in case
+ * of an unlisted frequency. That way, when cpufreq_online()
+ * triggers the first ever call to cpr_set_performance_state(),
+ * it will correctly determine the direction as UP.
+ */
+ for (iter = corners; iter <= end; iter++) {
+ if (iter->freq > rate)
+ break;
+ ret++;
+ if (iter->freq == rate) {
+ corner = iter;
+ break;
+ }
+ if (iter->freq < rate)
+ corner = iter;
+ }
+
+ if (!corner) {
+ dev_err(dev, "boot up corner not found\n");
+ return -EINVAL;
+ }
+
+ dev_dbg(dev, "boot up perf state: %u\n", ret);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(cpr_find_initial_corner);
+
+u32 cpr_get_fuse_corner(struct dev_pm_opp *opp, u32 tid)
+{
+ struct device_node *np;
+ u32 fc;
+
+ np = dev_pm_opp_get_of_node(opp);
+ if (of_property_read_u32_index(np, "qcom,opp-fuse-level", tid, &fc)) {
+ pr_debug("%s: missing 'qcom,opp-fuse-level' property\n",
+ __func__);
+ fc = 0;
+ }
+
+ of_node_put(np);
+
+ return fc;
+}
+EXPORT_SYMBOL_GPL(cpr_get_fuse_corner);
+
+unsigned long cpr_get_opp_hz_for_req(struct dev_pm_opp *ref,
+ struct device *cpu_dev)
+{
+ u64 rate = 0;
+ struct device_node *ref_np;
+ struct device_node *desc_np;
+ struct device_node *child_np = NULL;
+ struct device_node *child_req_np = NULL;
+
+ desc_np = dev_pm_opp_of_get_opp_desc_node(cpu_dev);
+ if (!desc_np)
+ return 0;
+
+ ref_np = dev_pm_opp_get_of_node(ref);
+ if (!ref_np)
+ goto out_ref;
+
+ do {
+ of_node_put(child_req_np);
+ child_np = of_get_next_available_child(desc_np, child_np);
+ child_req_np = of_parse_phandle(child_np, "required-opps", 0);
+ } while (child_np && child_req_np != ref_np);
+
+ if (child_np && child_req_np == ref_np)
+ of_property_read_u64(child_np, "opp-hz", &rate);
+
+ of_node_put(child_req_np);
+ of_node_put(child_np);
+ of_node_put(ref_np);
+out_ref:
+ of_node_put(desc_np);
+
+ return (unsigned long) rate;
+}
+EXPORT_SYMBOL_GPL(cpr_get_opp_hz_for_req);
+
+int cpr_calculate_scaling(const char *quot_offset,
+ struct device *dev,
+ const struct fuse_corner_data *fdata,
+ const struct corner *corner)
+{
+ u32 quot_diff = 0;
+ unsigned long freq_diff;
+ int scaling;
+ const struct fuse_corner *fuse, *prev_fuse;
+ int ret;
+
+ fuse = corner->fuse_corner;
+ prev_fuse = fuse - 1;
+
+ if (quot_offset) {
+ ret = nvmem_cell_read_variable_le_u32(dev, quot_offset, &quot_diff);
+ if (ret)
+ return ret;
+
+ quot_diff *= fdata->quot_offset_scale;
+ quot_diff += fdata->quot_offset_adjust;
+ } else {
+ quot_diff = fuse->quot - prev_fuse->quot;
+ }
+
+ freq_diff = fuse->max_freq - prev_fuse->max_freq;
+ freq_diff /= 1000000; /* Convert to MHz */
+ scaling = 1000 * quot_diff / freq_diff;
+ return min(scaling, fdata->max_quot_scale);
+}
+EXPORT_SYMBOL_GPL(cpr_calculate_scaling);
+
+int cpr_interpolate(const struct corner *corner, int step_volt,
+ const struct fuse_corner_data *fdata)
+{
+ unsigned long f_high, f_low, f_diff;
+ int uV_high, uV_low, uV;
+ u64 temp, temp_limit;
+ const struct fuse_corner *fuse, *prev_fuse;
+
+ fuse = corner->fuse_corner;
+ prev_fuse = fuse - 1;
+
+ f_high = fuse->max_freq;
+ f_low = prev_fuse->max_freq;
+ uV_high = fuse->uV;
+ uV_low = prev_fuse->uV;
+ f_diff = fuse->max_freq - corner->freq;
+
+ /*
+ * Don't interpolate in the wrong direction. This could happen
+ * if the adjusted fuse voltage overlaps with the previous fuse's
+ * adjusted voltage.
+ */
+ if (f_high <= f_low || uV_high <= uV_low || f_high <= corner->freq)
+ return corner->uV;
+
+ temp = f_diff * (uV_high - uV_low);
+ do_div(temp, f_high - f_low);
+
+ /*
+ * max_volt_scale has units of uV/MHz while freq values
+ * have units of Hz. Divide by 1000000 to convert to.
+ */
+ temp_limit = f_diff * fdata->max_volt_scale;
+ do_div(temp_limit, 1000000);
+
+ uV = uV_high - min(temp, temp_limit);
+ return roundup(uV, step_volt);
+}
+EXPORT_SYMBOL_GPL(cpr_interpolate);
+
+int cpr_check_vreg_constraints(struct device *dev, struct regulator *vreg,
+ struct fuse_corner *f)
+{
+ int ret;
+
+ ret = regulator_is_supported_voltage(vreg, f->min_uV, f->min_uV);
+ if (!ret) {
+ dev_err(dev, "min uV: %d not supported by regulator\n",
+ f->min_uV);
+ return -EINVAL;
+ }
+
+ ret = regulator_is_supported_voltage(vreg, f->max_uV, f->max_uV);
+ if (!ret) {
+ dev_err(dev, "max uV: %d not supported by regulator\n",
+ f->max_uV);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cpr_check_vreg_constraints);
+
+MODULE_DESCRIPTION("Core Power Reduction (CPR) common");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/soc/qcom/cpr-common.h b/drivers/soc/qcom/cpr-common.h
new file mode 100644
index 000000000000..54013b8a8e87
--- /dev/null
+++ b/drivers/soc/qcom/cpr-common.h
@@ -0,0 +1,111 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+#include <linux/pm_opp.h>
+#include <linux/regulator/consumer.h>
+
+enum voltage_change_dir {
+ NO_CHANGE,
+ DOWN,
+ UP,
+};
+
+struct fuse_corner_data {
+ int ref_uV;
+ int max_uV;
+ int min_uV;
+ int range_uV;
+ /* fuse volt: closed/open loop */
+ int volt_cloop_adjust;
+ int volt_oloop_adjust;
+ int max_volt_scale;
+ int max_quot_scale;
+ /* fuse quot */
+ int quot_offset;
+ int quot_scale;
+ int quot_adjust;
+ /* fuse quot_offset */
+ int quot_offset_scale;
+ int quot_offset_adjust;
+};
+
+struct cpr_fuse {
+ char *ring_osc;
+ char *init_voltage;
+ char *quotient;
+ char *quotient_offset;
+};
+
+struct fuse_corner {
+ int min_uV;
+ int max_uV;
+ int uV;
+ int quot;
+ int step_quot;
+ const struct reg_sequence *accs;
+ int num_accs;
+ unsigned long max_freq;
+ u8 ring_osc_idx;
+};
+
+struct corner {
+ int min_uV;
+ int max_uV;
+ int uV;
+ int last_uV;
+ int quot_adjust;
+ u32 save_ctl;
+ u32 save_irq;
+ unsigned long freq;
+ bool is_open_loop;
+ struct fuse_corner *fuse_corner;
+};
+
+struct corner_data {
+ unsigned int fuse_corner;
+ unsigned long freq;
+};
+
+struct acc_desc {
+ unsigned int enable_reg;
+ u32 enable_mask;
+
+ struct reg_sequence *config;
+ struct reg_sequence *settings;
+ int num_regs_per_fuse;
+};
+
+struct cpr_acc_desc {
+ const struct cpr_desc *cpr_desc;
+ const struct acc_desc *acc_desc;
+};
+
+int cpr_populate_ring_osc_idx(struct device *dev,
+ struct fuse_corner *fuse_corner,
+ const struct cpr_fuse *cpr_fuse,
+ int num_fuse_corners);
+int cpr_read_fuse_uV(int init_v_width, int step_size_uV, int ref_uV,
+ int adj, int step_volt, const char *init_v_efuse,
+ struct device *dev);
+const struct cpr_fuse *cpr_get_fuses(struct device *dev, int tid,
+ int num_fuse_corners);
+int cpr_populate_fuse_common(struct device *dev,
+ struct fuse_corner_data *fdata,
+ const struct cpr_fuse *cpr_fuse,
+ struct fuse_corner *fuse_corner,
+ int step_volt, int init_v_width,
+ int init_v_step);
+int cpr_find_initial_corner(struct device *dev, struct clk *cpu_clk,
+ struct corner *corners, int num_corners);
+u32 cpr_get_fuse_corner(struct dev_pm_opp *opp, u32 tid);
+unsigned long cpr_get_opp_hz_for_req(struct dev_pm_opp *ref,
+ struct device *cpu_dev);
+int cpr_calculate_scaling(const char *quot_offset,
+ struct device *dev,
+ const struct fuse_corner_data *fdata,
+ const struct corner *corner);
+int cpr_interpolate(const struct corner *corner, int step_volt,
+ const struct fuse_corner_data *fdata);
+int cpr_check_vreg_constraints(struct device *dev, struct regulator *vreg,
+ struct fuse_corner *f);
diff --git a/drivers/soc/qcom/cpr.c b/drivers/soc/qcom/cpr.c
index 4ce8e816154f..57206650bc6a 100644
--- a/drivers/soc/qcom/cpr.c
+++ b/drivers/soc/qcom/cpr.c
@@ -25,6 +25,7 @@
#include <linux/regulator/consumer.h>
#include <linux/clk.h>
#include <linux/nvmem-consumer.h>
+#include "cpr-common.h"

/* Register Offsets for RB-CPR and Bit Definitions */

@@ -124,45 +125,12 @@

#define FUSE_REVISION_UNKNOWN (-1)

-enum voltage_change_dir {
- NO_CHANGE,
- DOWN,
- UP,
-};
-
-struct cpr_fuse {
- char *ring_osc;
- char *init_voltage;
- char *quotient;
- char *quotient_offset;
-};
-
-struct fuse_corner_data {
- int ref_uV;
- int max_uV;
- int min_uV;
- int max_volt_scale;
- int max_quot_scale;
- /* fuse quot */
- int quot_offset;
- int quot_scale;
- int quot_adjust;
- /* fuse quot_offset */
- int quot_offset_scale;
- int quot_offset_adjust;
-};
-
struct cpr_fuses {
int init_voltage_step;
int init_voltage_width;
struct fuse_corner_data *fuse_corner_data;
};

-struct corner_data {
- unsigned int fuse_corner;
- unsigned long freq;
-};
-
struct cpr_desc {
unsigned int num_fuse_corners;
int min_diff_quot;
@@ -184,44 +152,6 @@ struct cpr_desc {
bool reduce_to_corner_uV;
};

-struct acc_desc {
- unsigned int enable_reg;
- u32 enable_mask;
-
- struct reg_sequence *config;
- struct reg_sequence *settings;
- int num_regs_per_fuse;
-};
-
-struct cpr_acc_desc {
- const struct cpr_desc *cpr_desc;
- const struct acc_desc *acc_desc;
-};
-
-struct fuse_corner {
- int min_uV;
- int max_uV;
- int uV;
- int quot;
- int step_quot;
- const struct reg_sequence *accs;
- int num_accs;
- unsigned long max_freq;
- u8 ring_osc_idx;
-};
-
-struct corner {
- int min_uV;
- int max_uV;
- int uV;
- int last_uV;
- int quot_adjust;
- u32 save_ctl;
- u32 save_irq;
- unsigned long freq;
- struct fuse_corner *fuse_corner;
-};
-
struct cpr_drv {
unsigned int num_corners;
unsigned int ref_clk_khz;
@@ -801,50 +731,6 @@ static int cpr_set_performance_state(struct generic_pm_domain *domain,
return ret;
}

-static int
-cpr_populate_ring_osc_idx(struct cpr_drv *drv)
-{
- struct fuse_corner *fuse = drv->fuse_corners;
- struct fuse_corner *end = fuse + drv->desc->num_fuse_corners;
- const struct cpr_fuse *fuses = drv->cpr_fuses;
- u32 data;
- int ret;
-
- for (; fuse < end; fuse++, fuses++) {
- ret = nvmem_cell_read_variable_le_u32(drv->dev, fuses->ring_osc, &data);
- if (ret)
- return ret;
- fuse->ring_osc_idx = data;
- }
-
- return 0;
-}
-
-static int cpr_read_fuse_uV(const struct cpr_desc *desc,
- const struct fuse_corner_data *fdata,
- const char *init_v_efuse,
- int step_volt,
- struct cpr_drv *drv)
-{
- int step_size_uV, steps, uV;
- u32 bits = 0;
- int ret;
-
- ret = nvmem_cell_read_variable_le_u32(drv->dev, init_v_efuse, &bits);
- if (ret)
- return ret;
-
- steps = bits & ~BIT(desc->cpr_fuses.init_voltage_width - 1);
- /* Not two's complement.. instead highest bit is sign bit */
- if (bits & BIT(desc->cpr_fuses.init_voltage_width - 1))
- steps = -steps;
-
- step_size_uV = desc->cpr_fuses.init_voltage_step;
-
- uV = fdata->ref_uV + steps * step_size_uV;
- return DIV_ROUND_UP(uV, step_volt) * step_volt;
-}
-
static int cpr_fuse_corner_init(struct cpr_drv *drv)
{
const struct cpr_desc *desc = drv->desc;
@@ -854,7 +740,6 @@ static int cpr_fuse_corner_init(struct cpr_drv *drv)
unsigned int step_volt;
struct fuse_corner_data *fdata;
struct fuse_corner *fuse, *end;
- int uV;
const struct reg_sequence *accs;
int ret;

@@ -870,23 +755,15 @@ static int cpr_fuse_corner_init(struct cpr_drv *drv)
fdata = desc->cpr_fuses.fuse_corner_data;

for (i = 0; fuse <= end; fuse++, fuses++, i++, fdata++) {
- /*
- * Update SoC voltages: platforms might choose a different
- * regulators than the one used to characterize the algorithms
- * (ie, init_voltage_step).
- */
- fdata->min_uV = roundup(fdata->min_uV, step_volt);
- fdata->max_uV = roundup(fdata->max_uV, step_volt);
-
- /* Populate uV */
- uV = cpr_read_fuse_uV(desc, fdata, fuses->init_voltage,
- step_volt, drv);
- if (uV < 0)
- return uV;
+ ret = cpr_populate_fuse_common(
+ drv->dev, fdata, fuses,
+ fuse, step_volt,
+ desc->cpr_fuses.init_voltage_width,
+ desc->cpr_fuses.init_voltage_step);
+ if (ret)
+ return ret;

- fuse->min_uV = fdata->min_uV;
- fuse->max_uV = fdata->max_uV;
- fuse->uV = clamp(uV, fuse->min_uV, fuse->max_uV);
+ fuse->step_quot = desc->step_quot[fuse->ring_osc_idx];

if (fuse == end) {
/*
@@ -898,16 +775,6 @@ static int cpr_fuse_corner_init(struct cpr_drv *drv)
end->max_uV = max(end->max_uV, end->uV);
}

- /* Populate target quotient by scaling */
- ret = nvmem_cell_read_variable_le_u32(drv->dev, fuses->quotient, &fuse->quot);
- if (ret)
- return ret;
-
- fuse->quot *= fdata->quot_scale;
- fuse->quot += fdata->quot_offset;
- fuse->quot += fdata->quot_adjust;
- fuse->step_quot = desc->step_quot[fuse->ring_osc_idx];
-
/* Populate acc settings */
fuse->accs = accs;
fuse->num_accs = acc_desc->num_regs_per_fuse;
@@ -924,25 +791,9 @@ static int cpr_fuse_corner_init(struct cpr_drv *drv)
else if (fuse->uV < fuse->min_uV)
fuse->uV = fuse->min_uV;

- ret = regulator_is_supported_voltage(drv->vdd_apc,
- fuse->min_uV,
- fuse->min_uV);
- if (!ret) {
- dev_err(drv->dev,
- "min uV: %d (fuse corner: %d) not supported by regulator\n",
- fuse->min_uV, i);
- return -EINVAL;
- }
-
- ret = regulator_is_supported_voltage(drv->vdd_apc,
- fuse->max_uV,
- fuse->max_uV);
- if (!ret) {
- dev_err(drv->dev,
- "max uV: %d (fuse corner: %d) not supported by regulator\n",
- fuse->max_uV, i);
- return -EINVAL;
- }
+ ret = cpr_check_vreg_constraints(drv->dev, drv->vdd_apc, fuse);
+ if (ret)
+ return ret;

dev_dbg(drv->dev,
"fuse corner %d: [%d %d %d] RO%hhu quot %d squot %d\n",
@@ -953,126 +804,6 @@ static int cpr_fuse_corner_init(struct cpr_drv *drv)
return 0;
}

-static int cpr_calculate_scaling(const char *quot_offset,
- struct cpr_drv *drv,
- const struct fuse_corner_data *fdata,
- const struct corner *corner)
-{
- u32 quot_diff = 0;
- unsigned long freq_diff;
- int scaling;
- const struct fuse_corner *fuse, *prev_fuse;
- int ret;
-
- fuse = corner->fuse_corner;
- prev_fuse = fuse - 1;
-
- if (quot_offset) {
- ret = nvmem_cell_read_variable_le_u32(drv->dev, quot_offset, &quot_diff);
- if (ret)
- return ret;
-
- quot_diff *= fdata->quot_offset_scale;
- quot_diff += fdata->quot_offset_adjust;
- } else {
- quot_diff = fuse->quot - prev_fuse->quot;
- }
-
- freq_diff = fuse->max_freq - prev_fuse->max_freq;
- freq_diff /= 1000000; /* Convert to MHz */
- scaling = 1000 * quot_diff / freq_diff;
- return min(scaling, fdata->max_quot_scale);
-}
-
-static int cpr_interpolate(const struct corner *corner, int step_volt,
- const struct fuse_corner_data *fdata)
-{
- unsigned long f_high, f_low, f_diff;
- int uV_high, uV_low, uV;
- u64 temp, temp_limit;
- const struct fuse_corner *fuse, *prev_fuse;
-
- fuse = corner->fuse_corner;
- prev_fuse = fuse - 1;
-
- f_high = fuse->max_freq;
- f_low = prev_fuse->max_freq;
- uV_high = fuse->uV;
- uV_low = prev_fuse->uV;
- f_diff = fuse->max_freq - corner->freq;
-
- /*
- * Don't interpolate in the wrong direction. This could happen
- * if the adjusted fuse voltage overlaps with the previous fuse's
- * adjusted voltage.
- */
- if (f_high <= f_low || uV_high <= uV_low || f_high <= corner->freq)
- return corner->uV;
-
- temp = f_diff * (uV_high - uV_low);
- do_div(temp, f_high - f_low);
-
- /*
- * max_volt_scale has units of uV/MHz while freq values
- * have units of Hz. Divide by 1000000 to convert to.
- */
- temp_limit = f_diff * fdata->max_volt_scale;
- do_div(temp_limit, 1000000);
-
- uV = uV_high - min(temp, temp_limit);
- return roundup(uV, step_volt);
-}
-
-static unsigned int cpr_get_fuse_corner(struct dev_pm_opp *opp)
-{
- struct device_node *np;
- unsigned int fuse_corner = 0;
-
- np = dev_pm_opp_get_of_node(opp);
- if (of_property_read_u32(np, "qcom,opp-fuse-level", &fuse_corner))
- pr_err("%s: missing 'qcom,opp-fuse-level' property\n",
- __func__);
-
- of_node_put(np);
-
- return fuse_corner;
-}
-
-static unsigned long cpr_get_opp_hz_for_req(struct dev_pm_opp *ref,
- struct device *cpu_dev)
-{
- u64 rate = 0;
- struct device_node *ref_np;
- struct device_node *desc_np;
- struct device_node *child_np = NULL;
- struct device_node *child_req_np = NULL;
-
- desc_np = dev_pm_opp_of_get_opp_desc_node(cpu_dev);
- if (!desc_np)
- return 0;
-
- ref_np = dev_pm_opp_get_of_node(ref);
- if (!ref_np)
- goto out_ref;
-
- do {
- of_node_put(child_req_np);
- child_np = of_get_next_available_child(desc_np, child_np);
- child_req_np = of_parse_phandle(child_np, "required-opps", 0);
- } while (child_np && child_req_np != ref_np);
-
- if (child_np && child_req_np == ref_np)
- of_property_read_u64(child_np, "opp-hz", &rate);
-
- of_node_put(child_req_np);
- of_node_put(child_np);
- of_node_put(ref_np);
-out_ref:
- of_node_put(desc_np);
-
- return (unsigned long) rate;
-}
-
static int cpr_corner_init(struct cpr_drv *drv)
{
const struct cpr_desc *desc = drv->desc;
@@ -1110,7 +841,7 @@ static int cpr_corner_init(struct cpr_drv *drv)
opp = dev_pm_opp_find_level_exact(&drv->pd.dev, level);
if (IS_ERR(opp))
return -EINVAL;
- fc = cpr_get_fuse_corner(opp);
+ fc = cpr_get_fuse_corner(opp, 0);
if (!fc) {
dev_pm_opp_put(opp);
return -EINVAL;
@@ -1186,7 +917,7 @@ static int cpr_corner_init(struct cpr_drv *drv)
corner->uV = fuse->uV;

if (prev_fuse && cdata[i - 1].freq == prev_fuse->max_freq) {
- scaling = cpr_calculate_scaling(quot_offset, drv,
+ scaling = cpr_calculate_scaling(quot_offset, drv->dev,
fdata, corner);
if (scaling < 0)
return scaling;
@@ -1224,47 +955,6 @@ static int cpr_corner_init(struct cpr_drv *drv)
return 0;
}

-static const struct cpr_fuse *cpr_get_fuses(struct cpr_drv *drv)
-{
- const struct cpr_desc *desc = drv->desc;
- struct cpr_fuse *fuses;
- int i;
-
- fuses = devm_kcalloc(drv->dev, desc->num_fuse_corners,
- sizeof(struct cpr_fuse),
- GFP_KERNEL);
- if (!fuses)
- return ERR_PTR(-ENOMEM);
-
- for (i = 0; i < desc->num_fuse_corners; i++) {
- char tbuf[32];
-
- snprintf(tbuf, 32, "cpr_ring_osc%d", i + 1);
- fuses[i].ring_osc = devm_kstrdup(drv->dev, tbuf, GFP_KERNEL);
- if (!fuses[i].ring_osc)
- return ERR_PTR(-ENOMEM);
-
- snprintf(tbuf, 32, "cpr_init_voltage%d", i + 1);
- fuses[i].init_voltage = devm_kstrdup(drv->dev, tbuf,
- GFP_KERNEL);
- if (!fuses[i].init_voltage)
- return ERR_PTR(-ENOMEM);
-
- snprintf(tbuf, 32, "cpr_quotient%d", i + 1);
- fuses[i].quotient = devm_kstrdup(drv->dev, tbuf, GFP_KERNEL);
- if (!fuses[i].quotient)
- return ERR_PTR(-ENOMEM);
-
- snprintf(tbuf, 32, "cpr_quotient_offset%d", i + 1);
- fuses[i].quotient_offset = devm_kstrdup(drv->dev, tbuf,
- GFP_KERNEL);
- if (!fuses[i].quotient_offset)
- return ERR_PTR(-ENOMEM);
- }
-
- return fuses;
-}
-
static void cpr_set_loop_allowed(struct cpr_drv *drv)
{
drv->loop_disabled = false;
@@ -1296,54 +986,6 @@ static int cpr_init_parameters(struct cpr_drv *drv)
return 0;
}

-static int cpr_find_initial_corner(struct cpr_drv *drv)
-{
- unsigned long rate;
- const struct corner *end;
- struct corner *iter;
- unsigned int i = 0;
-
- if (!drv->cpu_clk) {
- dev_err(drv->dev, "cannot get rate from NULL clk\n");
- return -EINVAL;
- }
-
- end = &drv->corners[drv->num_corners - 1];
- rate = clk_get_rate(drv->cpu_clk);
-
- /*
- * Some bootloaders set a CPU clock frequency that is not defined
- * in the OPP table. When running at an unlisted frequency,
- * cpufreq_online() will change to the OPP which has the lowest
- * frequency, at or above the unlisted frequency.
- * Since cpufreq_online() always "rounds up" in the case of an
- * unlisted frequency, this function always "rounds down" in case
- * of an unlisted frequency. That way, when cpufreq_online()
- * triggers the first ever call to cpr_set_performance_state(),
- * it will correctly determine the direction as UP.
- */
- for (iter = drv->corners; iter <= end; iter++) {
- if (iter->freq > rate)
- break;
- i++;
- if (iter->freq == rate) {
- drv->corner = iter;
- break;
- }
- if (iter->freq < rate)
- drv->corner = iter;
- }
-
- if (!drv->corner) {
- dev_err(drv->dev, "boot up corner not found\n");
- return -EINVAL;
- }
-
- dev_dbg(drv->dev, "boot up perf state: %u\n", i);
-
- return 0;
-}
-
static const struct cpr_desc qcs404_cpr_desc = {
.num_fuse_corners = 3,
.min_diff_quot = CPR_FUSE_MIN_QUOT_DIFF,
@@ -1531,8 +1173,9 @@ static int cpr_pd_attach_dev(struct generic_pm_domain *domain,
if (ret)
goto unlock;

- ret = cpr_find_initial_corner(drv);
- if (ret)
+ ret = cpr_find_initial_corner(drv->dev, drv->cpu_clk, drv->corners,
+ drv->num_corners);
+ if (ret < 0)
goto unlock;

if (acc_desc->config)
@@ -1617,6 +1260,7 @@ static int cpr_probe(struct platform_device *pdev)
struct resource *res;
struct device *dev = &pdev->dev;
struct cpr_drv *drv;
+ const struct cpr_desc *desc;
int irq, ret;
const struct cpr_acc_desc *data;
struct device_node *np;
@@ -1632,6 +1276,7 @@ static int cpr_probe(struct platform_device *pdev)
drv->dev = dev;
drv->desc = data->cpr_desc;
drv->acc_desc = data->acc_desc;
+ desc = drv->desc;

drv->fuse_corners = devm_kcalloc(dev, drv->desc->num_fuse_corners,
sizeof(*drv->fuse_corners),
@@ -1672,11 +1317,13 @@ static int cpr_probe(struct platform_device *pdev)
if (ret)
return ret;

- drv->cpr_fuses = cpr_get_fuses(drv);
+ drv->cpr_fuses = cpr_get_fuses(drv->dev, 0, desc->num_fuse_corners);
if (IS_ERR(drv->cpr_fuses))
return PTR_ERR(drv->cpr_fuses);

- ret = cpr_populate_ring_osc_idx(drv);
+ ret = cpr_populate_ring_osc_idx(drv->dev, drv->fuse_corners,
+ drv->cpr_fuses,
+ desc->num_fuse_corners);
if (ret)
return ret;

--
2.32.0