diff options
Diffstat (limited to 'drivers/clk')
| -rw-r--r-- | drivers/clk/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/clk/Makefile | 1 | ||||
| -rw-r--r-- | drivers/clk/at91/Makefile | 1 | ||||
| -rw-r--r-- | drivers/clk/at91/clk-h32mx.c | 123 | ||||
| -rw-r--r-- | drivers/clk/at91/clk-system.c | 8 | ||||
| -rw-r--r-- | drivers/clk/at91/pmc.c | 6 | ||||
| -rw-r--r-- | drivers/clk/at91/pmc.h | 5 | ||||
| -rw-r--r-- | drivers/clk/clk-rk808.c | 170 | ||||
| -rw-r--r-- | drivers/clk/shmobile/Makefile | 3 |
9 files changed, 317 insertions, 9 deletions
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index 1d4d3fc182dd..455fd17d938e 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -49,6 +49,15 @@ config COMMON_CLK_MAX77802 ---help--- This driver supports Maxim 77802 crystal oscillator clock. +config COMMON_CLK_RK808 + tristate "Clock driver for RK808" + depends on MFD_RK808 + ---help--- + This driver supports RK808 crystal oscillator clock. These + multi-function devices have two fixed-rate oscillators, + clocked at 32KHz each. Clkout1 is always on, Clkout2 can off + by control register. + config COMMON_CLK_SI5351 tristate "Clock driver for SiLabs 5351A/B/C" depends on I2C diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 5eaf1b547f19..d5fba5bc6e1b 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -31,6 +31,7 @@ obj-$(CONFIG_ARCH_NOMADIK) += clk-nomadik.o obj-$(CONFIG_ARCH_NSPIRE) += clk-nspire.o obj-$(CONFIG_COMMON_CLK_PALMAS) += clk-palmas.o obj-$(CONFIG_CLK_PPC_CORENET) += clk-ppc-corenet.o +obj-$(CONFIG_COMMON_CLK_RK808) += clk-rk808.o obj-$(CONFIG_COMMON_CLK_S2MPS11) += clk-s2mps11.o obj-$(CONFIG_COMMON_CLK_SI5351) += clk-si5351.o obj-$(CONFIG_COMMON_CLK_SI570) += clk-si570.o diff --git a/drivers/clk/at91/Makefile b/drivers/clk/at91/Makefile index 4998aee59267..89a48a7bd5df 100644 --- a/drivers/clk/at91/Makefile +++ b/drivers/clk/at91/Makefile @@ -9,3 +9,4 @@ obj-y += clk-system.o clk-peripheral.o clk-programmable.o obj-$(CONFIG_HAVE_AT91_UTMI) += clk-utmi.o obj-$(CONFIG_HAVE_AT91_USB_CLK) += clk-usb.o obj-$(CONFIG_HAVE_AT91_SMD) += clk-smd.o +obj-$(CONFIG_HAVE_AT91_H32MX) += clk-h32mx.o diff --git a/drivers/clk/at91/clk-h32mx.c b/drivers/clk/at91/clk-h32mx.c new file mode 100644 index 000000000000..152dcb3f7b5f --- /dev/null +++ b/drivers/clk/at91/clk-h32mx.c @@ -0,0 +1,123 @@ +/* + * clk-h32mx.c + * + * Copyright (C) 2014 Atmel + * + * Alexandre Belloni <alexandre.belloni@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 as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk/at91_pmc.h> +#include <linux/delay.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/io.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/sched.h> +#include <linux/wait.h> + +#include "pmc.h" + +#define H32MX_MAX_FREQ 90000000 + +struct clk_sama5d4_h32mx { + struct clk_hw hw; + struct at91_pmc *pmc; +}; + +#define to_clk_sama5d4_h32mx(hw) container_of(hw, struct clk_sama5d4_h32mx, hw) + +static unsigned long clk_sama5d4_h32mx_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_sama5d4_h32mx *h32mxclk = to_clk_sama5d4_h32mx(hw); + + if (pmc_read(h32mxclk->pmc, AT91_PMC_MCKR) & AT91_PMC_H32MXDIV) + return parent_rate / 2; + + if (parent_rate > H32MX_MAX_FREQ) + pr_warn("H32MX clock is too fast\n"); + return parent_rate; +} + +static long clk_sama5d4_h32mx_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + unsigned long div; + + if (rate > *parent_rate) + return *parent_rate; + div = *parent_rate / 2; + if (rate < div) + return div; + + if (rate - div < *parent_rate - rate) + return div; + + return *parent_rate; +} + +static int clk_sama5d4_h32mx_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_sama5d4_h32mx *h32mxclk = to_clk_sama5d4_h32mx(hw); + struct at91_pmc *pmc = h32mxclk->pmc; + u32 tmp; + + if (parent_rate != rate && (parent_rate / 2) != rate) + return -EINVAL; + + pmc_lock(pmc); + tmp = pmc_read(pmc, AT91_PMC_MCKR) & ~AT91_PMC_H32MXDIV; + if ((parent_rate / 2) == rate) + tmp |= AT91_PMC_H32MXDIV; + pmc_write(pmc, AT91_PMC_MCKR, tmp); + pmc_unlock(pmc); + + return 0; +} + +static const struct clk_ops h32mx_ops = { + .recalc_rate = clk_sama5d4_h32mx_recalc_rate, + .round_rate = clk_sama5d4_h32mx_round_rate, + .set_rate = clk_sama5d4_h32mx_set_rate, +}; + +void __init of_sama5d4_clk_h32mx_setup(struct device_node *np, + struct at91_pmc *pmc) +{ + struct clk_sama5d4_h32mx *h32mxclk; + struct clk_init_data init; + const char *parent_name; + struct clk *clk; + + h32mxclk = kzalloc(sizeof(*h32mxclk), GFP_KERNEL); + if (!h32mxclk) + return; + + parent_name = of_clk_get_parent_name(np, 0); + + init.name = np->name; + init.ops = &h32mx_ops; + init.parent_names = parent_name ? &parent_name : NULL; + init.num_parents = parent_name ? 1 : 0; + init.flags = CLK_SET_RATE_GATE; + + h32mxclk->hw.init = &init; + h32mxclk->pmc = pmc; + + clk = clk_register(NULL, &h32mxclk->hw); + if (!clk) + return; + + of_clk_add_provider(np, of_clk_src_simple_get, clk); +} diff --git a/drivers/clk/at91/clk-system.c b/drivers/clk/at91/clk-system.c index 8c96307d7363..a76d03fd577b 100644 --- a/drivers/clk/at91/clk-system.c +++ b/drivers/clk/at91/clk-system.c @@ -119,13 +119,7 @@ at91_clk_register_system(struct at91_pmc *pmc, const char *name, init.ops = &system_ops; init.parent_names = &parent_name; init.num_parents = 1; - /* - * CLK_IGNORE_UNUSED is used to avoid ddrck switch off. - * TODO : we should implement a driver supporting at91 ddr controller - * (see drivers/memory) which would request and enable the ddrck clock. - * When this is done we will be able to remove CLK_IGNORE_UNUSED flag. - */ - init.flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED; + init.flags = CLK_SET_RATE_PARENT; sys->id = id; sys->hw.init = &init; diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c index 524196bb35a5..386999b4f8eb 100644 --- a/drivers/clk/at91/pmc.c +++ b/drivers/clk/at91/pmc.c @@ -337,6 +337,12 @@ static const struct of_device_id pmc_clk_ids[] __initconst = { .data = of_at91sam9x5_clk_smd_setup, }, #endif +#if defined(CONFIG_HAVE_AT91_H32MX) + { + .compatible = "atmel,sama5d4-clk-h32mx", + .data = of_sama5d4_clk_h32mx_setup, + }, +#endif { /*sentinel*/ } }; diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h index 6c7625976113..52d2041fa3f6 100644 --- a/drivers/clk/at91/pmc.h +++ b/drivers/clk/at91/pmc.h @@ -120,4 +120,9 @@ extern void __init of_at91sam9x5_clk_smd_setup(struct device_node *np, struct at91_pmc *pmc); #endif +#if defined(CONFIG_HAVE_AT91_SMD) +extern void __init of_sama5d4_clk_h32mx_setup(struct device_node *np, + struct at91_pmc *pmc); +#endif + #endif /* __PMC_H_ */ diff --git a/drivers/clk/clk-rk808.c b/drivers/clk/clk-rk808.c new file mode 100644 index 000000000000..83902b9cd49e --- /dev/null +++ b/drivers/clk/clk-rk808.c @@ -0,0 +1,170 @@ +/* + * 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.h> +#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> + +#define RK808_NR_OUTPUT 2 + +struct rk808_clkout { + struct rk808 *rk808; + struct clk_onecell_data clk_data; + 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; +} + +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); +} + +static int rk808_clkout2_prepare(struct clk_hw *hw) +{ + return rk808_clkout2_enable(hw, true); +} + +static void rk808_clkout2_unprepare(struct clk_hw *hw) +{ + rk808_clkout2_enable(hw, false); +} + +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; +} + +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 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 clk **clk_table; + struct rk808_clkout *rk808_clkout; + + rk808_clkout = devm_kzalloc(&client->dev, + sizeof(*rk808_clkout), GFP_KERNEL); + if (!rk808_clkout) + return -ENOMEM; + + rk808_clkout->rk808 = rk808; + + clk_table = devm_kcalloc(&client->dev, RK808_NR_OUTPUT, + sizeof(struct clk *), GFP_KERNEL); + if (!clk_table) + return -ENOMEM; + + init.flags = CLK_IS_ROOT; + 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); + + clk_table[0] = devm_clk_register(&client->dev, + &rk808_clkout->clkout1_hw); + if (IS_ERR(clk_table[0])) + return PTR_ERR(clk_table[0]); + + 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); + + clk_table[1] = devm_clk_register(&client->dev, + &rk808_clkout->clkout2_hw); + if (IS_ERR(clk_table[1])) + return PTR_ERR(clk_table[1]); + + rk808_clkout->clk_data.clks = clk_table; + rk808_clkout->clk_data.clk_num = RK808_NR_OUTPUT; + + return of_clk_add_provider(node, of_clk_src_onecell_get, + &rk808_clkout->clk_data); +} + +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; +} + +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"); diff --git a/drivers/clk/shmobile/Makefile b/drivers/clk/shmobile/Makefile index e0029237827a..960bf22d42ae 100644 --- a/drivers/clk/shmobile/Makefile +++ b/drivers/clk/shmobile/Makefile @@ -4,7 +4,6 @@ obj-$(CONFIG_ARCH_R8A7740) += clk-r8a7740.o obj-$(CONFIG_ARCH_R8A7779) += clk-r8a7779.o obj-$(CONFIG_ARCH_R8A7790) += clk-rcar-gen2.o obj-$(CONFIG_ARCH_R8A7791) += clk-rcar-gen2.o +obj-$(CONFIG_ARCH_R8A7794) += clk-rcar-gen2.o obj-$(CONFIG_ARCH_SHMOBILE_MULTI) += clk-div6.o obj-$(CONFIG_ARCH_SHMOBILE_MULTI) += clk-mstp.o -# for emply built-in.o -obj-n := dummy |