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pinctrl: mvebu: add simple regmap based pinctrl implementation

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Add a simple regmap based pinctrl implementation for mvebu, for syscon
based regmap drivers.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Russell King 2017-01-13 11:03:35 +00:00 committed by Linus Walleij
parent ad9ec4ecee
commit d068b0988a
2 changed files with 75 additions and 1 deletions
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60
drivers/pinctrl/mvebu/pinctrl-mvebu.c
View File

@ -23,6 +23,8 @@
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include "pinctrl-mvebu.h"
@ -780,3 +782,61 @@ int mvebu_pinctrl_simple_mmio_probe(struct platform_device *pdev)
return mvebu_pinctrl_probe(pdev);
}
int mvebu_regmap_mpp_ctrl_get(struct mvebu_mpp_ctrl_data *data,
unsigned int pid, unsigned long *config)
{
unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
unsigned int val;
int err;
err = regmap_read(data->regmap.map, data->regmap.offset + off, &val);
if (err)
return err;
*config = (val >> shift) & MVEBU_MPP_MASK;
return 0;
}
int mvebu_regmap_mpp_ctrl_set(struct mvebu_mpp_ctrl_data *data,
unsigned int pid, unsigned long config)
{
unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
return regmap_update_bits(data->regmap.map, data->regmap.offset + off,
MVEBU_MPP_MASK << shift, config << shift);
}
int mvebu_pinctrl_simple_regmap_probe(struct platform_device *pdev,
struct device *syscon_dev)
{
struct mvebu_pinctrl_soc_info *soc = dev_get_platdata(&pdev->dev);
struct mvebu_mpp_ctrl_data *mpp_data;
struct regmap *regmap;
u32 offset;
int i;
regmap = syscon_node_to_regmap(syscon_dev->of_node);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
if (of_property_read_u32(pdev->dev.of_node, "offset", &offset))
return -EINVAL;
mpp_data = devm_kcalloc(&pdev->dev, soc->ncontrols, sizeof(*mpp_data),
GFP_KERNEL);
if (!mpp_data)
return -ENOMEM;
for (i = 0; i < soc->ncontrols; i++) {
mpp_data[i].regmap.map = regmap;
mpp_data[i].regmap.offset = offset;
}
soc->control_data = mpp_data;
return mvebu_pinctrl_probe(pdev);
}

16
drivers/pinctrl/mvebu/pinctrl-mvebu.h
View File

@ -16,9 +16,17 @@
/**
* struct mvebu_mpp_ctrl_data - private data for the mpp ctrl operations
* @base: base address of pinctrl hardware
* @regmap.map: regmap structure
* @regmap.offset: regmap offset
*/
struct mvebu_mpp_ctrl_data {
void __iomem *base;
union {
void __iomem *base;
struct {
struct regmap *map;
u32 offset;
} regmap;
};
};
/**
@ -194,8 +202,14 @@ int mvebu_mmio_mpp_ctrl_get(struct mvebu_mpp_ctrl_data *data, unsigned pid,
unsigned long *config);
int mvebu_mmio_mpp_ctrl_set(struct mvebu_mpp_ctrl_data *data, unsigned pid,
unsigned long config);
int mvebu_regmap_mpp_ctrl_get(struct mvebu_mpp_ctrl_data *data, unsigned pid,
unsigned long *config);
int mvebu_regmap_mpp_ctrl_set(struct mvebu_mpp_ctrl_data *data, unsigned pid,
unsigned long config);
int mvebu_pinctrl_probe(struct platform_device *pdev);
int mvebu_pinctrl_simple_mmio_probe(struct platform_device *pdev);
int mvebu_pinctrl_simple_regmap_probe(struct platform_device *pdev,
struct device *syscon_dev);
#endif