mirror of
https://github.com/torvalds/linux.git
synced 2024-12-06 02:52:22 +00:00
2b72c9e36c
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation version 2 of the license 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 15 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190530000437.052642892@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Atmel (Multi-port DDR-)SDRAM Controller driver
|
|
*
|
|
* Author: Alexandre Belloni <alexandre.belloni@free-electrons.com>
|
|
*
|
|
* Copyright (C) 2014 Atmel
|
|
*/
|
|
|
|
#include <linux/clk.h>
|
|
#include <linux/err.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
struct at91_ramc_caps {
|
|
bool has_ddrck;
|
|
bool has_mpddr_clk;
|
|
};
|
|
|
|
static const struct at91_ramc_caps at91rm9200_caps = { };
|
|
|
|
static const struct at91_ramc_caps at91sam9g45_caps = {
|
|
.has_ddrck = 1,
|
|
.has_mpddr_clk = 0,
|
|
};
|
|
|
|
static const struct at91_ramc_caps sama5d3_caps = {
|
|
.has_ddrck = 1,
|
|
.has_mpddr_clk = 1,
|
|
};
|
|
|
|
static const struct of_device_id atmel_ramc_of_match[] = {
|
|
{ .compatible = "atmel,at91rm9200-sdramc", .data = &at91rm9200_caps, },
|
|
{ .compatible = "atmel,at91sam9260-sdramc", .data = &at91rm9200_caps, },
|
|
{ .compatible = "atmel,at91sam9g45-ddramc", .data = &at91sam9g45_caps, },
|
|
{ .compatible = "atmel,sama5d3-ddramc", .data = &sama5d3_caps, },
|
|
{},
|
|
};
|
|
|
|
static int atmel_ramc_probe(struct platform_device *pdev)
|
|
{
|
|
const struct at91_ramc_caps *caps;
|
|
struct clk *clk;
|
|
|
|
caps = of_device_get_match_data(&pdev->dev);
|
|
|
|
if (caps->has_ddrck) {
|
|
clk = devm_clk_get(&pdev->dev, "ddrck");
|
|
if (IS_ERR(clk))
|
|
return PTR_ERR(clk);
|
|
clk_prepare_enable(clk);
|
|
}
|
|
|
|
if (caps->has_mpddr_clk) {
|
|
clk = devm_clk_get(&pdev->dev, "mpddr");
|
|
if (IS_ERR(clk)) {
|
|
pr_err("AT91 RAMC: couldn't get mpddr clock\n");
|
|
return PTR_ERR(clk);
|
|
}
|
|
clk_prepare_enable(clk);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver atmel_ramc_driver = {
|
|
.probe = atmel_ramc_probe,
|
|
.driver = {
|
|
.name = "atmel-ramc",
|
|
.of_match_table = atmel_ramc_of_match,
|
|
},
|
|
};
|
|
|
|
builtin_platform_driver(atmel_ramc_driver);
|