diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/clk/clk-max77802.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/clk/clk-max77802.c')
-rw-r--r-- | kernel/drivers/clk/clk-max77802.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/kernel/drivers/clk/clk-max77802.c b/kernel/drivers/clk/clk-max77802.c new file mode 100644 index 000000000..0729dc723 --- /dev/null +++ b/kernel/drivers/clk/clk-max77802.c @@ -0,0 +1,97 @@ +/* + * clk-max77802.c - Clock driver for Maxim 77802 + * + * Copyright (C) 2014 Google, Inc + * + * Copyright (C) 2012 Samsung Electornics + * Jonghwa Lee <jonghwa3.lee@samsung.com> + * + * 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; either version 2 of the License, or (at your + * option) any later version. + * + * 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. + * + * This driver is based on clk-max77686.c + */ + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/mfd/max77686-private.h> +#include <linux/clk-provider.h> +#include <linux/mutex.h> +#include <linux/clkdev.h> + +#include <dt-bindings/clock/maxim,max77802.h> +#include "clk-max-gen.h" + +#define MAX77802_CLOCK_OPMODE_MASK 0x1 +#define MAX77802_CLOCK_LOW_JITTER_SHIFT 0x3 + +static struct clk_init_data max77802_clks_init[MAX77802_CLKS_NUM] = { + [MAX77802_CLK_32K_AP] = { + .name = "32khz_ap", + .ops = &max_gen_clk_ops, + .flags = CLK_IS_ROOT, + }, + [MAX77802_CLK_32K_CP] = { + .name = "32khz_cp", + .ops = &max_gen_clk_ops, + .flags = CLK_IS_ROOT, + }, +}; + +static int max77802_clk_probe(struct platform_device *pdev) +{ + struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); + int ret; + + ret = max_gen_clk_probe(pdev, iodev->regmap, MAX77802_REG_32KHZ, + max77802_clks_init, MAX77802_CLKS_NUM); + + if (ret) { + dev_err(&pdev->dev, "generic probe failed %d\n", ret); + return ret; + } + + /* Enable low-jitter mode on the 32khz clocks. */ + ret = regmap_update_bits(iodev->regmap, MAX77802_REG_32KHZ, + 1 << MAX77802_CLOCK_LOW_JITTER_SHIFT, + 1 << MAX77802_CLOCK_LOW_JITTER_SHIFT); + if (ret < 0) + dev_err(&pdev->dev, "failed to enable low-jitter mode\n"); + + return ret; +} + +static int max77802_clk_remove(struct platform_device *pdev) +{ + return max_gen_clk_remove(pdev, MAX77802_CLKS_NUM); +} + +static const struct platform_device_id max77802_clk_id[] = { + { "max77802-clk", 0}, + { }, +}; +MODULE_DEVICE_TABLE(platform, max77802_clk_id); + +static struct platform_driver max77802_clk_driver = { + .driver = { + .name = "max77802-clk", + }, + .probe = max77802_clk_probe, + .remove = max77802_clk_remove, + .id_table = max77802_clk_id, +}; + +module_platform_driver(max77802_clk_driver); + +MODULE_DESCRIPTION("MAXIM 77802 Clock Driver"); +MODULE_AUTHOR("Javier Martinez Canillas <javier.martinez@collabora.co.uk>"); +MODULE_LICENSE("GPL"); |