Release 4.7 drivers/pinctrl/sh-pfc/core.c
/*
* Pin Control and GPIO driver for SuperH Pin Function Controller.
*
* Authors: Magnus Damm, Paul Mundt, Laurent Pinchart
*
* Copyright (C) 2008 Magnus Damm
* Copyright (C) 2009 - 2012 Paul Mundt
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#define DRV_NAME "sh-pfc"
#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/pinctrl/machine.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include "core.h"
static int sh_pfc_map_resources(struct sh_pfc *pfc,
struct platform_device *pdev)
{
unsigned int num_windows, num_irqs;
struct sh_pfc_window *windows;
unsigned int *irqs = NULL;
struct resource *res;
unsigned int i;
int irq;
/* Count the MEM and IRQ resources. */
for (num_windows = 0;; num_windows++) {
res = platform_get_resource(pdev, IORESOURCE_MEM, num_windows);
if (!res)
break;
}
for (num_irqs = 0;; num_irqs++) {
irq = platform_get_irq(pdev, num_irqs);
if (irq == -EPROBE_DEFER)
return irq;
if (irq < 0)
break;
}
if (num_windows == 0)
return -EINVAL;
/* Allocate memory windows and IRQs arrays. */
windows = devm_kzalloc(pfc->dev, num_windows * sizeof(*windows),
GFP_KERNEL);
if (windows == NULL)
return -ENOMEM;
pfc->num_windows = num_windows;
pfc->windows = windows;
if (num_irqs) {
irqs = devm_kzalloc(pfc->dev, num_irqs * sizeof(*irqs),
GFP_KERNEL);
if (irqs == NULL)
return -ENOMEM;
pfc->num_irqs = num_irqs;
pfc->irqs = irqs;
}
/* Fill them. */
for (i = 0; i < num_windows; i++) {
res = platform_get_resource(pdev, IORESOURCE_MEM, i);
windows->phys = res->start;
windows->size = resource_size(res);
windows->virt = devm_ioremap_resource(pfc->dev, res);
if (IS_ERR(windows->virt))
return -ENOMEM;
windows++;
}
for (i = 0; i < num_irqs; i++)
*irqs++ = platform_get_irq(pdev, i);
return 0;
}
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| paul mundt | paul mundt | 4 | 1.28% | 1 | 9.09% |
| Total | 313 | 100.00% | 11 | 100.00% |
static void __iomem *sh_pfc_phys_to_virt(struct sh_pfc *pfc, u32 reg)
{
struct sh_pfc_window *window;
phys_addr_t address = reg;
unsigned int i;
/* scan through physical windows and convert address */
for (i = 0; i < pfc->num_windows; i++) {
window = pfc->windows + i;
if (address < window->phys)
continue;
if (address >= (window->phys + window->size))
continue;
return window->virt + (address - window->phys);
}
BUG();
return NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| magnus damm | magnus damm | 71 | 71.72% | 1 | 11.11% |
| laurent pinchart | laurent pinchart | 17 | 17.17% | 6 | 66.67% |
| geert uytterhoeven | geert uytterhoeven | 7 | 7.07% | 1 | 11.11% |
| paul mundt | paul mundt | 4 | 4.04% | 1 | 11.11% |
| Total | 99 | 100.00% | 9 | 100.00% |
int sh_pfc_get_pin_index(struct sh_pfc *pfc, unsigned int pin)
{
unsigned int offset;
unsigned int i;
for (i = 0, offset = 0; i < pfc->nr_ranges; ++i) {
const struct sh_pfc_pin_range *range = &pfc->ranges[i];
if (pin <= range->end)
return pin >= range->start
? offset + pin - range->start : -1;
offset += range->end - range->start + 1;
}
return -EINVAL;
}
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| Total | 99 | 100.00% | 5 | 100.00% |
static int sh_pfc_enum_in_range(u16 enum_id, const struct pinmux_range *r)
{
if (enum_id < r->begin)
return 0;
if (enum_id > r->end)
return 0;
return 1;
}
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| Total | 40 | 100.00% | 4 | 100.00% |
u32 sh_pfc_read_raw_reg(void __iomem *mapped_reg, unsigned int reg_width)
{
switch (reg_width) {
case 8:
return ioread8(mapped_reg);
case 16:
return ioread16(mapped_reg);
case 32:
return ioread32(mapped_reg);
}
BUG();
return 0;
}
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| magnus damm | magnus damm | 50 | 94.34% | 2 | 40.00% |
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| laurent pinchart | laurent pinchart | 1 | 1.89% | 1 | 20.00% |
| Total | 53 | 100.00% | 5 | 100.00% |
void sh_pfc_write_raw_reg(void __iomem *mapped_reg, unsigned int reg_width,
u32 data)
{
switch (reg_width) {
case 8:
iowrite8(data, mapped_reg);
return;
case 16:
iowrite16(data, mapped_reg);
return;
case 32:
iowrite32(data, mapped_reg);
return;
}
BUG();
}
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| magnus damm | magnus damm | 56 | 94.92% | 2 | 40.00% |
| geert uytterhoeven | geert uytterhoeven | 2 | 3.39% | 2 | 40.00% |
| laurent pinchart | laurent pinchart | 1 | 1.69% | 1 | 20.00% |
| Total | 59 | 100.00% | 5 | 100.00% |
u32 sh_pfc_read_reg(struct sh_pfc *pfc, u32 reg, unsigned int width)
{
return sh_pfc_read_raw_reg(sh_pfc_phys_to_virt(pfc, reg), width);
}
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| Total | 30 | 100.00% | 1 | 100.00% |
void sh_pfc_write_reg(struct sh_pfc *pfc, u32 reg, unsigned int width, u32 data)
{
if (pfc->info->unlock_reg)
sh_pfc_write_raw_reg(
sh_pfc_phys_to_virt(pfc, pfc->info->unlock_reg), 32,
~data);
sh_pfc_write_raw_reg(sh_pfc_phys_to_virt(pfc, reg), width, data);
}
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| laurent pinchart | laurent pinchart | 61 | 100.00% | 1 | 100.00% |
| Total | 61 | 100.00% | 1 | 100.00% |
static void sh_pfc_config_reg_helper(struct sh_pfc *pfc,
const struct pinmux_cfg_reg *crp,
unsigned int in_pos,
void __iomem **mapped_regp, u32 *maskp,
unsigned int *posp)
{
unsigned int k;
*mapped_regp = sh_pfc_phys_to_virt(pfc, crp->reg);
if (crp->field_width) {
*maskp = (1 << crp->field_width) - 1;
*posp = crp->reg_width - ((in_pos + 1) * crp->field_width);
} else {
*maskp = (1 << crp->var_field_width[in_pos]) - 1;
*posp = crp->reg_width;
for (k = 0; k <= in_pos; k++)
*posp -= crp->var_field_width[k];
}
}
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| Person | Tokens | Prop | Commits | CommitProp |
| magnus damm | magnus damm | 131 | 92.91% | 4 | 40.00% |
| laurent pinchart | laurent pinchart | 4 | 2.84% | 3 | 30.00% |
| paul mundt | paul mundt | 3 | 2.13% | 1 | 10.00% |
| geert uytterhoeven | geert uytterhoeven | 3 | 2.13% | 2 | 20.00% |
| Total | 141 | 100.00% | 10 | 100.00% |
static void sh_pfc_write_config_reg(struct sh_pfc *pfc,
const struct pinmux_cfg_reg *crp,
unsigned int field, u32 value)
{
void __iomem *mapped_reg;
unsigned int pos;
u32 mask, data;
sh_pfc_config_reg_helper(pfc, crp, field, &mapped_reg, &mask, &pos);
dev_dbg(pfc->dev, "write_reg addr = %x, value = 0x%x, field = %u, "
"r_width = %u, f_width = %u\n",
crp->reg, value, field, crp->reg_width, crp->field_width);
mask = ~(mask << pos);
value = value << pos;
data = sh_pfc_read_raw_reg(mapped_reg, crp->reg_width);
data &= mask;
data |= value;
if (pfc->info->unlock_reg)
sh_pfc_write_raw_reg(
sh_pfc_phys_to_virt(pfc, pfc->info->unlock_reg), 32,
~data);
sh_pfc_write_raw_reg(mapped_reg, crp->reg_width, data);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| magnus damm | magnus damm | 124 | 80.52% | 5 | 33.33% |
| laurent pinchart | laurent pinchart | 16 | 10.39% | 5 | 33.33% |
| geert uytterhoeven | geert uytterhoeven | 8 | 5.19% | 4 | 26.67% |
| paul mundt | paul mundt | 6 | 3.90% | 1 | 6.67% |
| Total | 154 | 100.00% | 15 | 100.00% |
static int sh_pfc_get_config_reg(struct sh_pfc *pfc, u16 enum_id,
const struct pinmux_cfg_reg **crp,
unsigned int *fieldp, u32 *valuep)
{
unsigned int k = 0;
while (1) {
const struct pinmux_cfg_reg *config_reg =
pfc->info->cfg_regs + k;
unsigned int r_width = config_reg->reg_width;
unsigned int f_width = config_reg->field_width;
unsigned int curr_width;
unsigned int bit_pos;
unsigned int pos = 0;
unsigned int m = 0;
if (!r_width)
break;
for (bit_pos = 0; bit_pos < r_width; bit_pos += curr_width) {
u32 ncomb;
u32 n;
if (f_width)
curr_width = f_width;
else
curr_width = config_reg->var_field_width[m];
ncomb = 1 << curr_width;
for (n = 0; n < ncomb; n++) {
if (config_reg->enum_ids[pos + n] == enum_id) {
*crp = config_reg;
*fieldp = m;
*valuep = n;
return 0;
}
}
pos += ncomb;
m++;
}
k++;
}
return -EINVAL;
}
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| paul mundt | paul mundt | 3 | 1.46% | 1 | 7.69% |
| Total | 206 | 100.00% | 13 | 100.00% |
static int sh_pfc_mark_to_enum(struct sh_pfc *pfc, u16 mark, int pos,
u16 *enum_idp)
{
const u16 *data = pfc->info->pinmux_data;
unsigned int k;
if (pos) {
*enum_idp = data[pos + 1];
return pos + 1;
}
for (k = 0; k < pfc->info->pinmux_data_size; k++) {
if (data[k] == mark) {
*enum_idp = data[k + 1];
return k + 1;
}
}
dev_err(pfc->dev, "cannot locate data/mark enum_id for mark %d\n",
mark);
return -EINVAL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| magnus damm | magnus damm | 90 | 76.92% | 1 | 8.33% |
| laurent pinchart | laurent pinchart | 21 | 17.95% | 9 | 75.00% |
| paul mundt | paul mundt | 4 | 3.42% | 1 | 8.33% |
| geert uytterhoeven | geert uytterhoeven | 2 | 1.71% | 1 | 8.33% |
| Total | 117 | 100.00% | 12 | 100.00% |
int sh_pfc_config_mux(struct sh_pfc *pfc, unsigned mark, int pinmux_type)
{
const struct pinmux_range *range;
int pos = 0;
switch (pinmux_type) {
case PINMUX_TYPE_GPIO:
case PINMUX_TYPE_FUNCTION:
range = NULL;
break;
case PINMUX_TYPE_OUTPUT:
range = &pfc->info->output;
break;
case PINMUX_TYPE_INPUT:
range = &pfc->info->input;
break;
default:
return -EINVAL;
}
/* Iterate over all the configuration fields we need to update. */
while (1) {
const struct pinmux_cfg_reg *cr;
unsigned int field;
u16 enum_id;
u32 value;
int in_range;
int ret;
pos = sh_pfc_mark_to_enum(pfc, mark, pos, &enum_id);
if (pos < 0)
return pos;
if (!enum_id)
break;
/* Check if the configuration field selects a function. If it
* doesn't, skip the field if it's not applicable to the
* requested pinmux type.
*/
in_range = sh_pfc_enum_in_range(enum_id, &pfc->info->function);
if (!in_range) {
if (pinmux_type == PINMUX_TYPE_FUNCTION) {
/* Functions are allowed to modify all
* fields.
*/
in_range = 1;
} else if (pinmux_type != PINMUX_TYPE_GPIO) {
/* Input/output types can only modify fields
* that correspond to their respective ranges.
*/
in_range = sh_pfc_enum_in_range(enum_id, range);
/*
* special case pass through for fixed
* input-only or output-only pins without
* function enum register association.
*/
if (in_range && enum_id == range->force)
continue;
}
/* GPIOs are only allowed to modify function fields. */
}
if (!in_range)
continue;
ret = sh_pfc_get_config_reg(pfc, enum_id, &cr, &field, &value);
if (ret < 0)
return ret;
sh_pfc_write_config_reg(pfc, cr, field, value);
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| magnus damm | magnus damm | 157 | 63.56% | 5 | 33.33% |
| laurent pinchart | laurent pinchart | 58 | 23.48% | 8 | 53.33% |
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| paul mundt | paul mundt | 8 | 3.24% | 1 | 6.67% |
| Total | 247 | 100.00% | 15 | 100.00% |
static int sh_pfc_init_ranges(struct sh_pfc *pfc)
{
struct sh_pfc_pin_range *range;
unsigned int nr_ranges;
unsigned int i;
if (pfc->info->pins[0].pin == (u16)-1) {
/* Pin number -1 denotes that the SoC doesn't report pin numbers
* in its pin arrays yet. Consider the pin numbers range as
* continuous and allocate a single range.
*/
pfc->nr_ranges = 1;
pfc->ranges = devm_kzalloc(pfc->dev, sizeof(*pfc->ranges),
GFP_KERNEL);
if (pfc->ranges == NULL)
return -ENOMEM;
pfc->ranges->start = 0;
pfc->ranges->end = pfc->info->nr_pins - 1;
pfc->nr_gpio_pins = pfc->info->nr_pins;
return 0;
}
/* Count, allocate and fill the ranges. The PFC SoC data pins array must
* be sorted by pin numbers, and pins without a GPIO port must come
* last.
*/
for (i = 1, nr_ranges = 1; i < pfc->info->nr_pins; ++i) {
if (pfc->info->pins[i-1].pin != pfc->info->pins[i].pin - 1)
nr_ranges++;
}
pfc->nr_ranges = nr_ranges;
pfc->ranges = devm_kzalloc(pfc->dev, sizeof(*pfc->ranges) * nr_ranges,
GFP_KERNEL);
if (pfc->ranges == NULL)
return -ENOMEM;
range = pfc->ranges;
range->start = pfc->info->pins[0].pin;
for (i = 1; i < pfc->info->nr_pins; ++i) {
if (pfc->info->pins[i-1].pin == pfc->info->pins[i].pin - 1)
continue;
range->end = pfc->info->pins[i-1].pin;
if (!(pfc->info->pins[i-1].configs & SH_PFC_PIN_CFG_NO_GPIO))
pfc->nr_gpio_pins = range->end + 1;
range++;
range->start = pfc->info->pins[i].pin;
}
range->end = pfc->info->pins[i-1].pin;
if (!(pfc->info->pins[i-1].configs & SH_PFC_PIN_CFG_NO_GPIO))
pfc->nr_gpio_pins = range->end + 1;
return 0;
}
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| Total | 400 | 100.00% | 2 | 100.00% |
#ifdef CONFIG_OF
static const struct of_device_id sh_pfc_of_table[] = {
#ifdef CONFIG_PINCTRL_PFC_EMEV2
{
.compatible = "renesas,pfc-emev2",
.data = &emev2_pinmux_info,
},
#endif
#ifdef CONFIG_PINCTRL_PFC_R8A73A4
{
.compatible = "renesas,pfc-r8a73a4",
.data = &r8a73a4_pinmux_info,
},
#endif
#ifdef CONFIG_PINCTRL_PFC_R8A7740
{
.compatible = "renesas,pfc-r8a7740",
.data = &r8a7740_pinmux_info,
},
#endif
#ifdef CONFIG_PINCTRL_PFC_R8A7778
{
.compatible = "renesas,pfc-r8a7778",
.data = &r8a7778_pinmux_info,
},
#endif
#ifdef CONFIG_PINCTRL_PFC_R8A7779
{
.compatible = "renesas,pfc-r8a7779",
.data = &r8a7779_pinmux_info,
},
#endif
#ifdef CONFIG_PINCTRL_PFC_R8A7790
{
.compatible = "renesas,pfc-r8a7790",
.data = &r8a7790_pinmux_info,
},
#endif
#ifdef CONFIG_PINCTRL_PFC_R8A7791
{
.compatible = "renesas,pfc-r8a7791",
.data = &r8a7791_pinmux_info,
},
#endif
#ifdef CONFIG_PINCTRL_PFC_R8A7793
{
.compatible = "renesas,pfc-r8a7793",
.data = &r8a7793_pinmux_info,
},
#endif
#ifdef CONFIG_PINCTRL_PFC_R8A7794
{
.compatible = "renesas,pfc-r8a7794",
.data = &r8a7794_pinmux_info,
},
#endif
#ifdef CONFIG_PINCTRL_PFC_R8A7795
{
.compatible = "renesas,pfc-r8a7795",
.data = &r8a7795_pinmux_info,
},
#endif
#ifdef CONFIG_PINCTRL_PFC_SH73A0
{
.compatible = "renesas,pfc-sh73a0",
.data = &sh73a0_pinmux_info,
},
#endif
{ },
};
#endif
static int sh_pfc_probe(struct platform_device *pdev)
{
const struct platform_device_id *platid = platform_get_device_id(pdev);
#ifdef CONFIG_OF
struct device_node *np = pdev->dev.of_node;
#endif
const struct sh_pfc_soc_info *info;
struct sh_pfc *pfc;
int ret;
#ifdef CONFIG_OF
if (np)
info = of_device_get_match_data(&pdev->dev);
else
#endif
info = platid ? (const void *)platid->driver_data : NULL;
if (info == NULL)
return -ENODEV;
pfc = devm_kzalloc(&pdev->dev, sizeof(*pfc), GFP_KERNEL);
if (pfc == NULL)
return -ENOMEM;
pfc->info = info;
pfc->dev = &pdev->dev;
ret = sh_pfc_map_resources(pfc, pdev);
if (unlikely(ret < 0))
return ret;
spin_lock_init(&pfc->lock);
if (info->ops && info->ops->init) {
ret = info->ops->init(pfc);
if (ret < 0)
return ret;
}
/* Enable dummy states for those platforms without pinctrl support */
if (!of_have_populated_dt())
pinctrl_provide_dummies();
ret = sh_pfc_init_ranges(pfc);
if (ret < 0)
return ret;
/*
* Initialize pinctrl bindings first
*/
ret = sh_pfc_register_pinctrl(pfc);
if (unlikely(ret != 0))
return ret;
#ifdef CONFIG_PINCTRL_SH_PFC_GPIO
/*
* Then the GPIO chip
*/
ret = sh_pfc_register_gpiochip(pfc);
if (unlikely(ret != 0)) {
/*
* If the GPIO chip fails to come up we still leave the
* PFC state as it is, given that there are already
* extant users of it that have succeeded by this point.
*/
dev_notice(pfc->dev, "failed to init GPIO chip, ignoring...\n");
}
#endif
platform_set_drvdata(pdev, pfc);
dev_info(pfc->dev, "%s support registered\n", info->name);
return 0;
}
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| laurent pinchart | laurent pinchart | 209 | 68.30% | 13 | 59.09% |
| paul mundt | paul mundt | 70 | 22.88% | 3 | 13.64% |
| magnus damm | magnus damm | 19 | 6.21% | 4 | 18.18% |
| wolfram sang | wolfram sang | 8 | 2.61% | 2 | 9.09% |
| Total | 306 | 100.00% | 22 | 100.00% |
static int sh_pfc_remove(struct platform_device *pdev)
{
#ifdef CONFIG_PINCTRL_SH_PFC_GPIO
sh_pfc_unregister_gpiochip(platform_get_drvdata(pdev));
#endif
return 0;
}
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| laurent pinchart | laurent pinchart | 22 | 81.48% | 1 | 33.33% |
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| magnus damm | magnus damm | 1 | 3.70% | 1 | 33.33% |
| Total | 27 | 100.00% | 3 | 100.00% |
static const struct platform_device_id sh_pfc_id_table[] = {
#ifdef CONFIG_PINCTRL_PFC_SH7203
{ "pfc-sh7203", (kernel_ulong_t)&sh7203_pinmux_info },
#endif
#ifdef CONFIG_PINCTRL_PFC_SH7264
{ "pfc-sh7264", (kernel_ulong_t)&sh7264_pinmux_info },
#endif
#ifdef CONFIG_PINCTRL_PFC_SH7269
{ "pfc-sh7269", (kernel_ulong_t)&sh7269_pinmux_info },
#endif
#ifdef CONFIG_PINCTRL_PFC_SH7720
{ "pfc-sh7720", (kernel_ulong_t)&sh7720_pinmux_info },
#endif
#ifdef CONFIG_PINCTRL_PFC_SH7722
{ "pfc-sh7722", (kernel_ulong_t)&sh7722_pinmux_info },
#endif
#ifdef CONFIG_PINCTRL_PFC_SH7723
{ "pfc-sh7723", (kernel_ulong_t)&sh7723_pinmux_info },
#endif
#ifdef CONFIG_PINCTRL_PFC_SH7724
{ "pfc-sh7724", (kernel_ulong_t)&sh7724_pinmux_info },
#endif
#ifdef CONFIG_PINCTRL_PFC_SH7734
{ "pfc-sh7734", (kernel_ulong_t)&sh7734_pinmux_info },
#endif
#ifdef CONFIG_PINCTRL_PFC_SH7757
{ "pfc-sh7757", (kernel_ulong_t)&sh7757_pinmux_info },
#endif
#ifdef CONFIG_PINCTRL_PFC_SH7785
{ "pfc-sh7785", (kernel_ulong_t)&sh7785_pinmux_info },
#endif
#ifdef CONFIG_PINCTRL_PFC_SH7786
{ "pfc-sh7786", (kernel_ulong_t)&sh7786_pinmux_info },
#endif
#ifdef CONFIG_PINCTRL_PFC_SHX3
{ "pfc-shx3", (kernel_ulong_t)&shx3_pinmux_info },
#endif
{ "sh-pfc", 0 },
{ },
};
static struct platform_driver sh_pfc_driver = {
.probe = sh_pfc_probe,
.remove = sh_pfc_remove,
.id_table = sh_pfc_id_table,
.driver = {
.name = DRV_NAME,
.of_match_table = of_match_ptr(sh_pfc_of_table),
},
};
static int __init sh_pfc_init(void)
{
return platform_driver_register(&sh_pfc_driver);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| laurent pinchart | laurent pinchart | 14 | 87.50% | 2 | 50.00% |
| paul mundt | paul mundt | 2 | 12.50% | 2 | 50.00% |
| Total | 16 | 100.00% | 4 | 100.00% |
postcore_initcall(sh_pfc_init);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| laurent pinchart | laurent pinchart | 1508 | 52.58% | 49 | 61.25% |
| magnus damm | magnus damm | 977 | 34.07% | 13 | 16.25% |
| geert uytterhoeven | geert uytterhoeven | 177 | 6.17% | 7 | 8.75% |
| paul mundt | paul mundt | 106 | 3.70% | 3 | 3.75% |
| hisashi nakamura | hisashi nakamura | 36 | 1.26% | 2 | 2.50% |
| ulrich hecht | ulrich hecht | 18 | 0.63% | 1 | 1.25% |
| niklas soderlund | niklas soderlund | 18 | 0.63% | 1 | 1.25% |
| takeshi kihara | takeshi kihara | 18 | 0.63% | 1 | 1.25% |
| wolfram sang | wolfram sang | 8 | 0.28% | 2 | 2.50% |
| paul gortmaker | paul gortmaker | 2 | 0.07% | 1 | 1.25% |
| Total | 2868 | 100.00% | 80 | 100.00% |
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