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![Sebastian Reichel](/assets/img/avatar_default.png)
Reduce usage of 'struct rk808' (driver data of the parent MFD), so that only the chip variant field is still being accessed directly. This allows restructuring the MFD driver to support SPI based PMICs. Acked-by: Stephen Boyd <sboyd@kernel.org> Tested-by: Diederik de Haas <didi.debian@cknow.org> # Rock64, Quartz64 Model A + B Tested-by: Vincent Legoll <vincent.legoll@gmail.com> # Pine64 QuartzPro64 Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com> Link: https://lore.kernel.org/r/20230504173618.142075-2-sebastian.reichel@collabora.com Signed-off-by: Lee Jones <lee@kernel.org>
209 lines
4.9 KiB
C
209 lines
4.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Clkout driver for Rockchip RK808
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*
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* Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
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*
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* Author:Chris Zhong <zyw@rock-chips.com>
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*/
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#include <linux/clk-provider.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/mfd/rk808.h>
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struct rk808_clkout {
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struct regmap *regmap;
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struct clk_hw clkout1_hw;
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struct clk_hw clkout2_hw;
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};
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static unsigned long rk808_clkout_recalc_rate(struct clk_hw *hw,
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unsigned long parent_rate)
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{
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return 32768;
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}
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static int rk808_clkout2_enable(struct clk_hw *hw, bool enable)
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{
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struct rk808_clkout *rk808_clkout = container_of(hw,
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struct rk808_clkout,
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clkout2_hw);
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return regmap_update_bits(rk808_clkout->regmap, RK808_CLK32OUT_REG,
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CLK32KOUT2_EN, enable ? CLK32KOUT2_EN : 0);
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}
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static int rk808_clkout2_prepare(struct clk_hw *hw)
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{
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return rk808_clkout2_enable(hw, true);
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}
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static void rk808_clkout2_unprepare(struct clk_hw *hw)
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{
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rk808_clkout2_enable(hw, false);
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}
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static int rk808_clkout2_is_prepared(struct clk_hw *hw)
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{
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struct rk808_clkout *rk808_clkout = container_of(hw,
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struct rk808_clkout,
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clkout2_hw);
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uint32_t val;
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int ret = regmap_read(rk808_clkout->regmap, RK808_CLK32OUT_REG, &val);
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if (ret < 0)
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return ret;
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return (val & CLK32KOUT2_EN) ? 1 : 0;
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}
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static const struct clk_ops rk808_clkout1_ops = {
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.recalc_rate = rk808_clkout_recalc_rate,
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};
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static const struct clk_ops rk808_clkout2_ops = {
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.prepare = rk808_clkout2_prepare,
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.unprepare = rk808_clkout2_unprepare,
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.is_prepared = rk808_clkout2_is_prepared,
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.recalc_rate = rk808_clkout_recalc_rate,
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};
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static struct clk_hw *
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of_clk_rk808_get(struct of_phandle_args *clkspec, void *data)
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{
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struct rk808_clkout *rk808_clkout = data;
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unsigned int idx = clkspec->args[0];
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if (idx >= 2) {
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pr_err("%s: invalid index %u\n", __func__, idx);
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return ERR_PTR(-EINVAL);
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}
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return idx ? &rk808_clkout->clkout2_hw : &rk808_clkout->clkout1_hw;
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}
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static int rk817_clkout2_enable(struct clk_hw *hw, bool enable)
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{
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struct rk808_clkout *rk808_clkout = container_of(hw,
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struct rk808_clkout,
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clkout2_hw);
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return regmap_update_bits(rk808_clkout->regmap, RK817_SYS_CFG(1),
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RK817_CLK32KOUT2_EN,
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enable ? RK817_CLK32KOUT2_EN : 0);
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}
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static int rk817_clkout2_prepare(struct clk_hw *hw)
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{
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return rk817_clkout2_enable(hw, true);
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}
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static void rk817_clkout2_unprepare(struct clk_hw *hw)
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{
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rk817_clkout2_enable(hw, false);
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}
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static int rk817_clkout2_is_prepared(struct clk_hw *hw)
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{
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struct rk808_clkout *rk808_clkout = container_of(hw,
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struct rk808_clkout,
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clkout2_hw);
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unsigned int val;
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int ret = regmap_read(rk808_clkout->regmap, RK817_SYS_CFG(1), &val);
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if (ret < 0)
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return 0;
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return (val & RK817_CLK32KOUT2_EN) ? 1 : 0;
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}
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static const struct clk_ops rk817_clkout2_ops = {
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.prepare = rk817_clkout2_prepare,
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.unprepare = rk817_clkout2_unprepare,
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.is_prepared = rk817_clkout2_is_prepared,
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.recalc_rate = rk808_clkout_recalc_rate,
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};
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static const struct clk_ops *rkpmic_get_ops(long variant)
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{
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switch (variant) {
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case RK809_ID:
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case RK817_ID:
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return &rk817_clkout2_ops;
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/*
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* For the default case, it match the following PMIC type.
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* RK805_ID
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* RK808_ID
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* RK818_ID
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*/
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default:
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return &rk808_clkout2_ops;
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}
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}
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static int rk808_clkout_probe(struct platform_device *pdev)
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{
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struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
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struct device *dev = &pdev->dev;
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struct clk_init_data init = {};
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struct rk808_clkout *rk808_clkout;
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int ret;
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dev->of_node = pdev->dev.parent->of_node;
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rk808_clkout = devm_kzalloc(dev,
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sizeof(*rk808_clkout), GFP_KERNEL);
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if (!rk808_clkout)
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return -ENOMEM;
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rk808_clkout->regmap = dev_get_regmap(pdev->dev.parent, NULL);
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if (!rk808_clkout->regmap)
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return -ENODEV;
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init.parent_names = NULL;
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init.num_parents = 0;
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init.name = "rk808-clkout1";
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init.ops = &rk808_clkout1_ops;
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rk808_clkout->clkout1_hw.init = &init;
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/* optional override of the clockname */
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of_property_read_string_index(dev->of_node, "clock-output-names",
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0, &init.name);
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ret = devm_clk_hw_register(dev, &rk808_clkout->clkout1_hw);
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if (ret)
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return ret;
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init.name = "rk808-clkout2";
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init.ops = rkpmic_get_ops(rk808->variant);
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rk808_clkout->clkout2_hw.init = &init;
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/* optional override of the clockname */
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of_property_read_string_index(dev->of_node, "clock-output-names",
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1, &init.name);
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ret = devm_clk_hw_register(dev, &rk808_clkout->clkout2_hw);
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if (ret)
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return ret;
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return devm_of_clk_add_hw_provider(&pdev->dev, of_clk_rk808_get,
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rk808_clkout);
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}
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static struct platform_driver rk808_clkout_driver = {
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.probe = rk808_clkout_probe,
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.driver = {
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.name = "rk808-clkout",
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},
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};
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module_platform_driver(rk808_clkout_driver);
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MODULE_DESCRIPTION("Clkout driver for the rk808 series PMICs");
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MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:rk808-clkout");
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