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linux/drivers/clk/tegra/clk-tegra124-dfll-fcpu.c
Uwe Kleine-König 3fd43a2c3a clk: tegra: Convert to platform remove callback returning void 
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230312161512.2715500-27-u.kleine-koenig@pengutronix.de
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2023-03-28 19:31:45 -07:00

646 lines
16 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-only
/*
* Tegra124 DFLL FCPU clock source driver
*
* Copyright (C) 2012-2019 NVIDIA Corporation. All rights reserved.
*
* Aleksandr Frid <afrid@nvidia.com>
* Paul Walmsley <pwalmsley@nvidia.com>
*/
#include <linux/cpu.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <soc/tegra/fuse.h>
#include "clk.h"
#include "clk-dfll.h"
#include "cvb.h"
struct dfll_fcpu_data {
const unsigned long *cpu_max_freq_table;
unsigned int cpu_max_freq_table_size;
const struct cvb_table *cpu_cvb_tables;
unsigned int cpu_cvb_tables_size;
};
/* Maximum CPU frequency, indexed by CPU speedo id */
static const unsigned long tegra124_cpu_max_freq_table[] = {
[0] = 2014500000UL,
[1] = 2320500000UL,
[2] = 2116500000UL,
[3] = 2524500000UL,
};
static const struct cvb_table tegra124_cpu_cvb_tables[] = {
{
.speedo_id = -1,
.process_id = -1,
.min_millivolts = 900,
.max_millivolts = 1260,
.speedo_scale = 100,
.voltage_scale = 1000,
.entries = {
{ 204000000UL, { 1112619, -29295, 402 } },
{ 306000000UL, { 1150460, -30585, 402 } },
{ 408000000UL, { 1190122, -31865, 402 } },
{ 510000000UL, { 1231606, -33155, 402 } },
{ 612000000UL, { 1274912, -34435, 402 } },
{ 714000000UL, { 1320040, -35725, 402 } },
{ 816000000UL, { 1366990, -37005, 402 } },
{ 918000000UL, { 1415762, -38295, 402 } },
{ 1020000000UL, { 1466355, -39575, 402 } },
{ 1122000000UL, { 1518771, -40865, 402 } },
{ 1224000000UL, { 1573009, -42145, 402 } },
{ 1326000000UL, { 1629068, -43435, 402 } },
{ 1428000000UL, { 1686950, -44715, 402 } },
{ 1530000000UL, { 1746653, -46005, 402 } },
{ 1632000000UL, { 1808179, -47285, 402 } },
{ 1734000000UL, { 1871526, -48575, 402 } },
{ 1836000000UL, { 1936696, -49855, 402 } },
{ 1938000000UL, { 2003687, -51145, 402 } },
{ 2014500000UL, { 2054787, -52095, 402 } },
{ 2116500000UL, { 2124957, -53385, 402 } },
{ 2218500000UL, { 2196950, -54665, 402 } },
{ 2320500000UL, { 2270765, -55955, 402 } },
{ 2422500000UL, { 2346401, -57235, 402 } },
{ 2524500000UL, { 2437299, -58535, 402 } },
{ 0UL, { 0, 0, 0 } },
},
.cpu_dfll_data = {
.tune0_low = 0x005020ff,
.tune0_high = 0x005040ff,
.tune1 = 0x00000060,
}
},
};
static const unsigned long tegra210_cpu_max_freq_table[] = {
[0] = 1912500000UL,
[1] = 1912500000UL,
[2] = 2218500000UL,
[3] = 1785000000UL,
[4] = 1632000000UL,
[5] = 1912500000UL,
[6] = 2014500000UL,
[7] = 1734000000UL,
[8] = 1683000000UL,
[9] = 1555500000UL,
[10] = 1504500000UL,
};
#define CPU_CVB_TABLE \
.speedo_scale = 100, \
.voltage_scale = 1000, \
.entries = { \
{ 204000000UL, { 1007452, -23865, 370 } }, \
{ 306000000UL, { 1052709, -24875, 370 } }, \
{ 408000000UL, { 1099069, -25895, 370 } }, \
{ 510000000UL, { 1146534, -26905, 370 } }, \
{ 612000000UL, { 1195102, -27915, 370 } }, \
{ 714000000UL, { 1244773, -28925, 370 } }, \
{ 816000000UL, { 1295549, -29935, 370 } }, \
{ 918000000UL, { 1347428, -30955, 370 } }, \
{ 1020000000UL, { 1400411, -31965, 370 } }, \
{ 1122000000UL, { 1454497, -32975, 370 } }, \
{ 1224000000UL, { 1509687, -33985, 370 } }, \
{ 1326000000UL, { 1565981, -35005, 370 } }, \
{ 1428000000UL, { 1623379, -36015, 370 } }, \
{ 1530000000UL, { 1681880, -37025, 370 } }, \
{ 1632000000UL, { 1741485, -38035, 370 } }, \
{ 1734000000UL, { 1802194, -39055, 370 } }, \
{ 1836000000UL, { 1864006, -40065, 370 } }, \
{ 1912500000UL, { 1910780, -40815, 370 } }, \
{ 2014500000UL, { 1227000, 0, 0 } }, \
{ 2218500000UL, { 1227000, 0, 0 } }, \
{ 0UL, { 0, 0, 0 } }, \
}
#define CPU_CVB_TABLE_XA \
.speedo_scale = 100, \
.voltage_scale = 1000, \
.entries = { \
{ 204000000UL, { 1250024, -39785, 565 } }, \
{ 306000000UL, { 1297556, -41145, 565 } }, \
{ 408000000UL, { 1346718, -42505, 565 } }, \
{ 510000000UL, { 1397511, -43855, 565 } }, \
{ 612000000UL, { 1449933, -45215, 565 } }, \
{ 714000000UL, { 1503986, -46575, 565 } }, \
{ 816000000UL, { 1559669, -47935, 565 } }, \
{ 918000000UL, { 1616982, -49295, 565 } }, \
{ 1020000000UL, { 1675926, -50645, 565 } }, \
{ 1122000000UL, { 1736500, -52005, 565 } }, \
{ 1224000000UL, { 1798704, -53365, 565 } }, \
{ 1326000000UL, { 1862538, -54725, 565 } }, \
{ 1428000000UL, { 1928003, -56085, 565 } }, \
{ 1530000000UL, { 1995097, -57435, 565 } }, \
{ 1606500000UL, { 2046149, -58445, 565 } }, \
{ 1632000000UL, { 2063822, -58795, 565 } }, \
{ 0UL, { 0, 0, 0 } }, \
}
#define CPU_CVB_TABLE_EUCM1 \
.speedo_scale = 100, \
.voltage_scale = 1000, \
.entries = { \
{ 204000000UL, { 734429, 0, 0 } }, \
{ 306000000UL, { 768191, 0, 0 } }, \
{ 408000000UL, { 801953, 0, 0 } }, \
{ 510000000UL, { 835715, 0, 0 } }, \
{ 612000000UL, { 869477, 0, 0 } }, \
{ 714000000UL, { 903239, 0, 0 } }, \
{ 816000000UL, { 937001, 0, 0 } }, \
{ 918000000UL, { 970763, 0, 0 } }, \
{ 1020000000UL, { 1004525, 0, 0 } }, \
{ 1122000000UL, { 1038287, 0, 0 } }, \
{ 1224000000UL, { 1072049, 0, 0 } }, \
{ 1326000000UL, { 1105811, 0, 0 } }, \
{ 1428000000UL, { 1130000, 0, 0 } }, \
{ 1555500000UL, { 1130000, 0, 0 } }, \
{ 1632000000UL, { 1170000, 0, 0 } }, \
{ 1734000000UL, { 1227500, 0, 0 } }, \
{ 0UL, { 0, 0, 0 } }, \
}
#define CPU_CVB_TABLE_EUCM2 \
.speedo_scale = 100, \
.voltage_scale = 1000, \
.entries = { \
{ 204000000UL, { 742283, 0, 0 } }, \
{ 306000000UL, { 776249, 0, 0 } }, \
{ 408000000UL, { 810215, 0, 0 } }, \
{ 510000000UL, { 844181, 0, 0 } }, \
{ 612000000UL, { 878147, 0, 0 } }, \
{ 714000000UL, { 912113, 0, 0 } }, \
{ 816000000UL, { 946079, 0, 0 } }, \
{ 918000000UL, { 980045, 0, 0 } }, \
{ 1020000000UL, { 1014011, 0, 0 } }, \
{ 1122000000UL, { 1047977, 0, 0 } }, \
{ 1224000000UL, { 1081943, 0, 0 } }, \
{ 1326000000UL, { 1090000, 0, 0 } }, \
{ 1479000000UL, { 1090000, 0, 0 } }, \
{ 1555500000UL, { 1162000, 0, 0 } }, \
{ 1683000000UL, { 1195000, 0, 0 } }, \
{ 0UL, { 0, 0, 0 } }, \
}
#define CPU_CVB_TABLE_EUCM2_JOINT_RAIL \
.speedo_scale = 100, \
.voltage_scale = 1000, \
.entries = { \
{ 204000000UL, { 742283, 0, 0 } }, \
{ 306000000UL, { 776249, 0, 0 } }, \
{ 408000000UL, { 810215, 0, 0 } }, \
{ 510000000UL, { 844181, 0, 0 } }, \
{ 612000000UL, { 878147, 0, 0 } }, \
{ 714000000UL, { 912113, 0, 0 } }, \
{ 816000000UL, { 946079, 0, 0 } }, \
{ 918000000UL, { 980045, 0, 0 } }, \
{ 1020000000UL, { 1014011, 0, 0 } }, \
{ 1122000000UL, { 1047977, 0, 0 } }, \
{ 1224000000UL, { 1081943, 0, 0 } }, \
{ 1326000000UL, { 1090000, 0, 0 } }, \
{ 1479000000UL, { 1090000, 0, 0 } }, \
{ 1504500000UL, { 1120000, 0, 0 } }, \
{ 0UL, { 0, 0, 0 } }, \
}
#define CPU_CVB_TABLE_ODN \
.speedo_scale = 100, \
.voltage_scale = 1000, \
.entries = { \
{ 204000000UL, { 721094, 0, 0 } }, \
{ 306000000UL, { 754040, 0, 0 } }, \
{ 408000000UL, { 786986, 0, 0 } }, \
{ 510000000UL, { 819932, 0, 0 } }, \
{ 612000000UL, { 852878, 0, 0 } }, \
{ 714000000UL, { 885824, 0, 0 } }, \
{ 816000000UL, { 918770, 0, 0 } }, \
{ 918000000UL, { 915716, 0, 0 } }, \
{ 1020000000UL, { 984662, 0, 0 } }, \
{ 1122000000UL, { 1017608, 0, 0 } }, \
{ 1224000000UL, { 1050554, 0, 0 } }, \
{ 1326000000UL, { 1083500, 0, 0 } }, \
{ 1428000000UL, { 1116446, 0, 0 } }, \
{ 1581000000UL, { 1130000, 0, 0 } }, \
{ 1683000000UL, { 1168000, 0, 0 } }, \
{ 1785000000UL, { 1227500, 0, 0 } }, \
{ 0UL, { 0, 0, 0 } }, \
}
static struct cvb_table tegra210_cpu_cvb_tables[] = {
{
.speedo_id = 10,
.process_id = 0,
.min_millivolts = 840,
.max_millivolts = 1120,
CPU_CVB_TABLE_EUCM2_JOINT_RAIL,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune0_high = 0xffead0ff,
.tune1 = 0x20091d9,
.tune_high_min_millivolts = 864,
}
},
{
.speedo_id = 10,
.process_id = 1,
.min_millivolts = 840,
.max_millivolts = 1120,
CPU_CVB_TABLE_EUCM2_JOINT_RAIL,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune0_high = 0xffead0ff,
.tune1 = 0x20091d9,
.tune_high_min_millivolts = 864,
}
},
{
.speedo_id = 9,
.process_id = 0,
.min_millivolts = 900,
.max_millivolts = 1162,
CPU_CVB_TABLE_EUCM2,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune0_high = 0xffead0ff,
.tune1 = 0x20091d9,
}
},
{
.speedo_id = 9,
.process_id = 1,
.min_millivolts = 900,
.max_millivolts = 1162,
CPU_CVB_TABLE_EUCM2,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune0_high = 0xffead0ff,
.tune1 = 0x20091d9,
}
},
{
.speedo_id = 8,
.process_id = 0,
.min_millivolts = 900,
.max_millivolts = 1195,
CPU_CVB_TABLE_EUCM2,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune0_high = 0xffead0ff,
.tune1 = 0x20091d9,
}
},
{
.speedo_id = 8,
.process_id = 1,
.min_millivolts = 900,
.max_millivolts = 1195,
CPU_CVB_TABLE_EUCM2,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune0_high = 0xffead0ff,
.tune1 = 0x20091d9,
}
},
{
.speedo_id = 7,
.process_id = 0,
.min_millivolts = 841,
.max_millivolts = 1227,
CPU_CVB_TABLE_EUCM1,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune0_high = 0xffead0ff,
.tune1 = 0x20091d9,
.tune_high_min_millivolts = 864,
}
},
{
.speedo_id = 7,
.process_id = 1,
.min_millivolts = 841,
.max_millivolts = 1227,
CPU_CVB_TABLE_EUCM1,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune0_high = 0xffead0ff,
.tune1 = 0x20091d9,
.tune_high_min_millivolts = 864,
}
},
{
.speedo_id = 6,
.process_id = 0,
.min_millivolts = 870,
.max_millivolts = 1150,
CPU_CVB_TABLE,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune1 = 0x20091d9,
}
},
{
.speedo_id = 6,
.process_id = 1,
.min_millivolts = 870,
.max_millivolts = 1150,
CPU_CVB_TABLE,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune1 = 0x25501d0,
}
},
{
.speedo_id = 5,
.process_id = 0,
.min_millivolts = 818,
.max_millivolts = 1227,
CPU_CVB_TABLE,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune0_high = 0xffead0ff,
.tune1 = 0x20091d9,
.tune_high_min_millivolts = 864,
}
},
{
.speedo_id = 5,
.process_id = 1,
.min_millivolts = 818,
.max_millivolts = 1227,
CPU_CVB_TABLE,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune0_high = 0xffead0ff,
.tune1 = 0x25501d0,
.tune_high_min_millivolts = 864,
}
},
{
.speedo_id = 4,
.process_id = -1,
.min_millivolts = 918,
.max_millivolts = 1113,
CPU_CVB_TABLE_XA,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune1 = 0x17711BD,
}
},
{
.speedo_id = 3,
.process_id = 0,
.min_millivolts = 825,
.max_millivolts = 1227,
CPU_CVB_TABLE_ODN,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune0_high = 0xffead0ff,
.tune1 = 0x20091d9,
.tune_high_min_millivolts = 864,
}
},
{
.speedo_id = 3,
.process_id = 1,
.min_millivolts = 825,
.max_millivolts = 1227,
CPU_CVB_TABLE_ODN,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune0_high = 0xffead0ff,
.tune1 = 0x25501d0,
.tune_high_min_millivolts = 864,
}
},
{
.speedo_id = 2,
.process_id = 0,
.min_millivolts = 870,
.max_millivolts = 1227,
CPU_CVB_TABLE,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune1 = 0x20091d9,
}
},
{
.speedo_id = 2,
.process_id = 1,
.min_millivolts = 870,
.max_millivolts = 1227,
CPU_CVB_TABLE,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune1 = 0x25501d0,
}
},
{
.speedo_id = 1,
.process_id = 0,
.min_millivolts = 837,
.max_millivolts = 1227,
CPU_CVB_TABLE,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune0_high = 0xffead0ff,
.tune1 = 0x20091d9,
.tune_high_min_millivolts = 864,
}
},
{
.speedo_id = 1,
.process_id = 1,
.min_millivolts = 837,
.max_millivolts = 1227,
CPU_CVB_TABLE,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune0_high = 0xffead0ff,
.tune1 = 0x25501d0,
.tune_high_min_millivolts = 864,
}
},
{
.speedo_id = 0,
.process_id = 0,
.min_millivolts = 850,
.max_millivolts = 1170,
CPU_CVB_TABLE,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune0_high = 0xffead0ff,
.tune1 = 0x20091d9,
.tune_high_min_millivolts = 864,
}
},
{
.speedo_id = 0,
.process_id = 1,
.min_millivolts = 850,
.max_millivolts = 1170,
CPU_CVB_TABLE,
.cpu_dfll_data = {
.tune0_low = 0xffead0ff,
.tune0_high = 0xffead0ff,
.tune1 = 0x25501d0,
.tune_high_min_millivolts = 864,
}
},
};
static const struct dfll_fcpu_data tegra124_dfll_fcpu_data = {
.cpu_max_freq_table = tegra124_cpu_max_freq_table,
.cpu_max_freq_table_size = ARRAY_SIZE(tegra124_cpu_max_freq_table),
.cpu_cvb_tables = tegra124_cpu_cvb_tables,
.cpu_cvb_tables_size = ARRAY_SIZE(tegra124_cpu_cvb_tables)
};
static const struct dfll_fcpu_data tegra210_dfll_fcpu_data = {
.cpu_max_freq_table = tegra210_cpu_max_freq_table,
.cpu_max_freq_table_size = ARRAY_SIZE(tegra210_cpu_max_freq_table),
.cpu_cvb_tables = tegra210_cpu_cvb_tables,
.cpu_cvb_tables_size = ARRAY_SIZE(tegra210_cpu_cvb_tables),
};
static const struct of_device_id tegra124_dfll_fcpu_of_match[] = {
{
.compatible = "nvidia,tegra124-dfll",
.data = &tegra124_dfll_fcpu_data,
},
{
.compatible = "nvidia,tegra210-dfll",
.data = &tegra210_dfll_fcpu_data
},
{ },
};
static void get_alignment_from_dt(struct device *dev,
struct rail_alignment *align)
{
if (of_property_read_u32(dev->of_node,
"nvidia,pwm-voltage-step-microvolts",
&align->step_uv))
align->step_uv = 0;
if (of_property_read_u32(dev->of_node,
"nvidia,pwm-min-microvolts",
&align->offset_uv))
align->offset_uv = 0;
}
static int get_alignment_from_regulator(struct device *dev,
struct rail_alignment *align)
{
struct regulator *reg = regulator_get(dev, "vdd-cpu");
if (IS_ERR(reg))
return PTR_ERR(reg);
align->offset_uv = regulator_list_voltage(reg, 0);
align->step_uv = regulator_get_linear_step(reg);
regulator_put(reg);
return 0;
}
static int tegra124_dfll_fcpu_probe(struct platform_device *pdev)
{
int process_id, speedo_id, speedo_value, err;
struct tegra_dfll_soc_data *soc;
const struct dfll_fcpu_data *fcpu_data;
struct rail_alignment align;
fcpu_data = of_device_get_match_data(&pdev->dev);
if (!fcpu_data)
return -ENODEV;
process_id = tegra_sku_info.cpu_process_id;
speedo_id = tegra_sku_info.cpu_speedo_id;
speedo_value = tegra_sku_info.cpu_speedo_value;
if (speedo_id >= fcpu_data->cpu_max_freq_table_size) {
dev_err(&pdev->dev, "unknown max CPU freq for speedo_id=%d\n",
speedo_id);
return -ENODEV;
}
soc = devm_kzalloc(&pdev->dev, sizeof(*soc), GFP_KERNEL);
if (!soc)
return -ENOMEM;
soc->dev = get_cpu_device(0);
if (!soc->dev) {
dev_err(&pdev->dev, "no CPU0 device\n");
return -ENODEV;
}
if (of_property_read_bool(pdev->dev.of_node, "nvidia,pwm-to-pmic")) {
get_alignment_from_dt(&pdev->dev, &align);
} else {
err = get_alignment_from_regulator(&pdev->dev, &align);
if (err)
return err;
}
soc->max_freq = fcpu_data->cpu_max_freq_table[speedo_id];
soc->cvb = tegra_cvb_add_opp_table(soc->dev, fcpu_data->cpu_cvb_tables,
fcpu_data->cpu_cvb_tables_size,
&align, process_id, speedo_id,
speedo_value, soc->max_freq);
soc->alignment = align;
if (IS_ERR(soc->cvb)) {
dev_err(&pdev->dev, "couldn't add OPP table: %ld\n",
PTR_ERR(soc->cvb));
return PTR_ERR(soc->cvb);
}
err = tegra_dfll_register(pdev, soc);
if (err < 0) {
tegra_cvb_remove_opp_table(soc->dev, soc->cvb, soc->max_freq);
return err;
}
return 0;
}
static void tegra124_dfll_fcpu_remove(struct platform_device *pdev)
{
struct tegra_dfll_soc_data *soc;
/*
* Note that exiting early here is dangerous as after this function
* returns *soc is freed.
*/
soc = tegra_dfll_unregister(pdev);
if (IS_ERR(soc))
return;
tegra_cvb_remove_opp_table(soc->dev, soc->cvb, soc->max_freq);
}
static const struct dev_pm_ops tegra124_dfll_pm_ops = {
SET_RUNTIME_PM_OPS(tegra_dfll_runtime_suspend,
tegra_dfll_runtime_resume, NULL)
SET_SYSTEM_SLEEP_PM_OPS(tegra_dfll_suspend, tegra_dfll_resume)
};
static struct platform_driver tegra124_dfll_fcpu_driver = {
.probe = tegra124_dfll_fcpu_probe,
.remove_new = tegra124_dfll_fcpu_remove,
.driver = {
.name = "tegra124-dfll",
.of_match_table = tegra124_dfll_fcpu_of_match,
.pm = &tegra124_dfll_pm_ops,
},
};
builtin_platform_driver(tegra124_dfll_fcpu_driver);
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