mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 22:26:50 +07:00
f32fb9a593
Use devm_mfd_add_devices() for MFD devices registration and get rid of .remove callback to remove MFD child-devices. This is done by managed device framework. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
159 lines
4.1 KiB
C
159 lines
4.1 KiB
C
/*
|
|
* Copyright (C) 2014 Free Electrons
|
|
* Copyright (C) 2014 Atmel
|
|
*
|
|
* Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published by
|
|
* the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/clk.h>
|
|
#include <linux/iopoll.h>
|
|
#include <linux/mfd/atmel-hlcdc.h>
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regmap.h>
|
|
|
|
#define ATMEL_HLCDC_REG_MAX (0x4000 - 0x4)
|
|
|
|
struct atmel_hlcdc_regmap {
|
|
void __iomem *regs;
|
|
};
|
|
|
|
static const struct mfd_cell atmel_hlcdc_cells[] = {
|
|
{
|
|
.name = "atmel-hlcdc-pwm",
|
|
.of_compatible = "atmel,hlcdc-pwm",
|
|
},
|
|
{
|
|
.name = "atmel-hlcdc-dc",
|
|
.of_compatible = "atmel,hlcdc-display-controller",
|
|
},
|
|
};
|
|
|
|
static int regmap_atmel_hlcdc_reg_write(void *context, unsigned int reg,
|
|
unsigned int val)
|
|
{
|
|
struct atmel_hlcdc_regmap *hregmap = context;
|
|
|
|
if (reg <= ATMEL_HLCDC_DIS) {
|
|
u32 status;
|
|
|
|
readl_poll_timeout(hregmap->regs + ATMEL_HLCDC_SR, status,
|
|
!(status & ATMEL_HLCDC_SIP), 1, 100);
|
|
}
|
|
|
|
writel(val, hregmap->regs + reg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int regmap_atmel_hlcdc_reg_read(void *context, unsigned int reg,
|
|
unsigned int *val)
|
|
{
|
|
struct atmel_hlcdc_regmap *hregmap = context;
|
|
|
|
*val = readl(hregmap->regs + reg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct regmap_config atmel_hlcdc_regmap_config = {
|
|
.reg_bits = 32,
|
|
.val_bits = 32,
|
|
.reg_stride = 4,
|
|
.max_register = ATMEL_HLCDC_REG_MAX,
|
|
.reg_write = regmap_atmel_hlcdc_reg_write,
|
|
.reg_read = regmap_atmel_hlcdc_reg_read,
|
|
.fast_io = true,
|
|
};
|
|
|
|
static int atmel_hlcdc_probe(struct platform_device *pdev)
|
|
{
|
|
struct atmel_hlcdc_regmap *hregmap;
|
|
struct device *dev = &pdev->dev;
|
|
struct atmel_hlcdc *hlcdc;
|
|
struct resource *res;
|
|
|
|
hregmap = devm_kzalloc(dev, sizeof(*hregmap), GFP_KERNEL);
|
|
if (!hregmap)
|
|
return -ENOMEM;
|
|
|
|
hlcdc = devm_kzalloc(dev, sizeof(*hlcdc), GFP_KERNEL);
|
|
if (!hlcdc)
|
|
return -ENOMEM;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
hregmap->regs = devm_ioremap_resource(dev, res);
|
|
if (IS_ERR(hregmap->regs))
|
|
return PTR_ERR(hregmap->regs);
|
|
|
|
hlcdc->irq = platform_get_irq(pdev, 0);
|
|
if (hlcdc->irq < 0)
|
|
return hlcdc->irq;
|
|
|
|
hlcdc->periph_clk = devm_clk_get(dev, "periph_clk");
|
|
if (IS_ERR(hlcdc->periph_clk)) {
|
|
dev_err(dev, "failed to get peripheral clock\n");
|
|
return PTR_ERR(hlcdc->periph_clk);
|
|
}
|
|
|
|
hlcdc->sys_clk = devm_clk_get(dev, "sys_clk");
|
|
if (IS_ERR(hlcdc->sys_clk)) {
|
|
dev_err(dev, "failed to get system clock\n");
|
|
return PTR_ERR(hlcdc->sys_clk);
|
|
}
|
|
|
|
hlcdc->slow_clk = devm_clk_get(dev, "slow_clk");
|
|
if (IS_ERR(hlcdc->slow_clk)) {
|
|
dev_err(dev, "failed to get slow clock\n");
|
|
return PTR_ERR(hlcdc->slow_clk);
|
|
}
|
|
|
|
hlcdc->regmap = devm_regmap_init(dev, NULL, hregmap,
|
|
&atmel_hlcdc_regmap_config);
|
|
if (IS_ERR(hlcdc->regmap))
|
|
return PTR_ERR(hlcdc->regmap);
|
|
|
|
dev_set_drvdata(dev, hlcdc);
|
|
|
|
return devm_mfd_add_devices(dev, -1, atmel_hlcdc_cells,
|
|
ARRAY_SIZE(atmel_hlcdc_cells),
|
|
NULL, 0, NULL);
|
|
}
|
|
|
|
static const struct of_device_id atmel_hlcdc_match[] = {
|
|
{ .compatible = "atmel,at91sam9n12-hlcdc" },
|
|
{ .compatible = "atmel,at91sam9x5-hlcdc" },
|
|
{ .compatible = "atmel,sama5d2-hlcdc" },
|
|
{ .compatible = "atmel,sama5d3-hlcdc" },
|
|
{ .compatible = "atmel,sama5d4-hlcdc" },
|
|
{ /* sentinel */ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, atmel_hlcdc_match);
|
|
|
|
static struct platform_driver atmel_hlcdc_driver = {
|
|
.probe = atmel_hlcdc_probe,
|
|
.driver = {
|
|
.name = "atmel-hlcdc",
|
|
.of_match_table = atmel_hlcdc_match,
|
|
},
|
|
};
|
|
module_platform_driver(atmel_hlcdc_driver);
|
|
|
|
MODULE_ALIAS("platform:atmel-hlcdc");
|
|
MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
|
|
MODULE_DESCRIPTION("Atmel HLCDC driver");
|
|
MODULE_LICENSE("GPL v2");
|