cregit-Linux how code gets into the kernel

Release 4.14 drivers/clk/clk-rk808.c

Directory: drivers/clk
/*
 * Clkout driver for Rockchip RK808
 *
 * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
 *
 * Author:Chris Zhong <zyw@rock-chips.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 */

#include <linux/clk-provider.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/mfd/rk808.h>
#include <linux/i2c.h>


struct rk808_clkout {
	
struct rk808 *rk808;
	
struct clk_hw		clkout1_hw;
	
struct clk_hw		clkout2_hw;
};


static unsigned long rk808_clkout_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { return 32768; }

Contributors

PersonTokensPropCommitsCommitProp
Chris Zhong19100.00%1100.00%
Total19100.00%1100.00%


static int rk808_clkout2_enable(struct clk_hw *hw, bool enable) { struct rk808_clkout *rk808_clkout = container_of(hw, struct rk808_clkout, clkout2_hw); struct rk808 *rk808 = rk808_clkout->rk808; return regmap_update_bits(rk808->regmap, RK808_CLK32OUT_REG, CLK32KOUT2_EN, enable ? CLK32KOUT2_EN : 0); }

Contributors

PersonTokensPropCommitsCommitProp
Chris Zhong56100.00%1100.00%
Total56100.00%1100.00%


static int rk808_clkout2_prepare(struct clk_hw *hw) { return rk808_clkout2_enable(hw, true); }

Contributors

PersonTokensPropCommitsCommitProp
Chris Zhong19100.00%1100.00%
Total19100.00%1100.00%


static void rk808_clkout2_unprepare(struct clk_hw *hw) { rk808_clkout2_enable(hw, false); }

Contributors

PersonTokensPropCommitsCommitProp
Chris Zhong18100.00%1100.00%
Total18100.00%1100.00%


static int rk808_clkout2_is_prepared(struct clk_hw *hw) { struct rk808_clkout *rk808_clkout = container_of(hw, struct rk808_clkout, clkout2_hw); struct rk808 *rk808 = rk808_clkout->rk808; uint32_t val; int ret = regmap_read(rk808->regmap, RK808_CLK32OUT_REG, &val); if (ret < 0) return ret; return (val & CLK32KOUT2_EN) ? 1 : 0; }

Contributors

PersonTokensPropCommitsCommitProp
Chris Zhong73100.00%1100.00%
Total73100.00%1100.00%

static const struct clk_ops rk808_clkout1_ops = { .recalc_rate = rk808_clkout_recalc_rate, }; static const struct clk_ops rk808_clkout2_ops = { .prepare = rk808_clkout2_prepare, .unprepare = rk808_clkout2_unprepare, .is_prepared = rk808_clkout2_is_prepared, .recalc_rate = rk808_clkout_recalc_rate, };
static struct clk_hw * of_clk_rk808_get(struct of_phandle_args *clkspec, void *data) { struct rk808_clkout *rk808_clkout = data; unsigned int idx = clkspec->args[0]; if (idx >= 2) { pr_err("%s: invalid index %u\n", __func__, idx); return ERR_PTR(-EINVAL); } return idx ? &rk808_clkout->clkout2_hw : &rk808_clkout->clkout1_hw; }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Boyd72100.00%1100.00%
Total72100.00%1100.00%


static int rk808_clkout_probe(struct platform_device *pdev) { struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent); struct i2c_client *client = rk808->i2c; struct device_node *node = client->dev.of_node; struct clk_init_data init = {}; struct rk808_clkout *rk808_clkout; int ret; rk808_clkout = devm_kzalloc(&client->dev, sizeof(*rk808_clkout), GFP_KERNEL); if (!rk808_clkout) return -ENOMEM; rk808_clkout->rk808 = rk808; init.parent_names = NULL; init.num_parents = 0; init.name = "rk808-clkout1"; init.ops = &rk808_clkout1_ops; rk808_clkout->clkout1_hw.init = &init; /* optional override of the clockname */ of_property_read_string_index(node, "clock-output-names", 0, &init.name); ret = devm_clk_hw_register(&client->dev, &rk808_clkout->clkout1_hw); if (ret) return ret; init.name = "rk808-clkout2"; init.ops = &rk808_clkout2_ops; rk808_clkout->clkout2_hw.init = &init; /* optional override of the clockname */ of_property_read_string_index(node, "clock-output-names", 1, &init.name); ret = devm_clk_hw_register(&client->dev, &rk808_clkout->clkout2_hw); if (ret) return ret; return of_clk_add_hw_provider(node, of_clk_rk808_get, rk808_clkout); }

Contributors

PersonTokensPropCommitsCommitProp
Chris Zhong21994.40%150.00%
Stephen Boyd135.60%150.00%
Total232100.00%2100.00%


static int rk808_clkout_remove(struct platform_device *pdev) { struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent); struct i2c_client *client = rk808->i2c; struct device_node *node = client->dev.of_node; of_clk_del_provider(node); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Chris Zhong53100.00%1100.00%
Total53100.00%1100.00%

static struct platform_driver rk808_clkout_driver = { .probe = rk808_clkout_probe, .remove = rk808_clkout_remove, .driver = { .name = "rk808-clkout", }, }; module_platform_driver(rk808_clkout_driver); MODULE_DESCRIPTION("Clkout driver for the rk808 series PMICs"); MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:rk808-clkout");

Overall Contributors

PersonTokensPropCommitsCommitProp
Chris Zhong58787.35%150.00%
Stephen Boyd8512.65%150.00%
Total672100.00%2100.00%
Directory: drivers/clk
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.