diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index 96969b9e30..9c2b284d02 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -46,6 +46,20 @@ config CLK_BOSTON help Enable this to support the clocks +config SPL_CLK_CCF + bool "SPL Common Clock Framework [CCF] support " + depends on SPL_CLK_IMX6Q + help + Enable this option if you want to (re-)use the Linux kernel's Common + Clock Framework [CCF] code in U-Boot's SPL. + +config CLK_CCF + bool "Common Clock Framework [CCF] support " + depends on CLK_IMX6Q + help + Enable this option if you want to (re-)use the Linux kernel's Common + Clock Framework [CCF] code in U-Boot's clock driver. + config CLK_STM32F bool "Enable clock driver support for STM32F family" depends on CLK && (STM32F7 || STM32F4) diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 719b9b8e02..1a45bf3505 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -7,6 +7,8 @@ obj-$(CONFIG_$(SPL_TPL_)CLK) += clk-uclass.o obj-$(CONFIG_$(SPL_TPL_)CLK) += clk_fixed_rate.o obj-$(CONFIG_$(SPL_TPL_)CLK) += clk_fixed_factor.o +obj-$(CONFIG_$(SPL_TPL_)CLK_CCF) += clk.o clk-divider.o clk-mux.o +obj-$(CONFIG_$(SPL_TPL_)CLK_CCF) += clk-fixed-factor.o obj-y += imx/ obj-y += tegra/ diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c new file mode 100644 index 0000000000..3348d97829 --- /dev/null +++ b/drivers/clk/clk-divider.c @@ -0,0 +1,147 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 DENX Software Engineering + * Lukasz Majewski, DENX Software Engineering, lukma@denx.de + * + * Copyright (C) 2011 Sascha Hauer, Pengutronix + * Copyright (C) 2011 Richard Zhao, Linaro + * Copyright (C) 2011-2012 Mike Turquette, Linaro Ltd + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "clk.h" + +#define UBOOT_DM_CLK_CCF_DIVIDER "ccf_clk_divider" + +static unsigned int _get_table_div(const struct clk_div_table *table, + unsigned int val) +{ + const struct clk_div_table *clkt; + + for (clkt = table; clkt->div; clkt++) + if (clkt->val == val) + return clkt->div; + return 0; +} + +static unsigned int _get_div(const struct clk_div_table *table, + unsigned int val, unsigned long flags, u8 width) +{ + if (flags & CLK_DIVIDER_ONE_BASED) + return val; + if (flags & CLK_DIVIDER_POWER_OF_TWO) + return 1 << val; + if (flags & CLK_DIVIDER_MAX_AT_ZERO) + return val ? val : clk_div_mask(width) + 1; + if (table) + return _get_table_div(table, val); + return val + 1; +} + +unsigned long divider_recalc_rate(struct clk *hw, unsigned long parent_rate, + unsigned int val, + const struct clk_div_table *table, + unsigned long flags, unsigned long width) +{ + unsigned int div; + + div = _get_div(table, val, flags, width); + if (!div) { + WARN(!(flags & CLK_DIVIDER_ALLOW_ZERO), + "%s: Zero divisor and CLK_DIVIDER_ALLOW_ZERO not set\n", + clk_hw_get_name(hw)); + return parent_rate; + } + + return DIV_ROUND_UP_ULL((u64)parent_rate, div); +} + +static ulong clk_divider_recalc_rate(struct clk *clk) +{ + struct clk_divider *divider = + to_clk_divider(dev_get_clk_ptr(clk->dev)); + unsigned long parent_rate = clk_get_parent_rate(clk); + unsigned int val; + + val = readl(divider->reg) >> divider->shift; + val &= clk_div_mask(divider->width); + + return divider_recalc_rate(clk, parent_rate, val, divider->table, + divider->flags, divider->width); +} + +const struct clk_ops clk_divider_ops = { + .get_rate = clk_divider_recalc_rate, +}; + +static struct clk *_register_divider(struct device *dev, const char *name, + const char *parent_name, unsigned long flags, + void __iomem *reg, u8 shift, u8 width, + u8 clk_divider_flags, const struct clk_div_table *table) +{ + struct clk_divider *div; + struct clk *clk; + int ret; + + if (clk_divider_flags & CLK_DIVIDER_HIWORD_MASK) { + if (width + shift > 16) { + pr_warn("divider value exceeds LOWORD field\n"); + return ERR_PTR(-EINVAL); + } + } + + /* allocate the divider */ + div = kzalloc(sizeof(*div), GFP_KERNEL); + if (!div) + return ERR_PTR(-ENOMEM); + + /* struct clk_divider assignments */ + div->reg = reg; + div->shift = shift; + div->width = width; + div->flags = clk_divider_flags; + div->table = table; + + /* register the clock */ + clk = &div->clk; + + ret = clk_register(clk, UBOOT_DM_CLK_CCF_DIVIDER, name, parent_name); + if (ret) { + kfree(div); + return ERR_PTR(ret); + } + + return clk; +} + +struct clk *clk_register_divider(struct device *dev, const char *name, + const char *parent_name, unsigned long flags, + void __iomem *reg, u8 shift, u8 width, + u8 clk_divider_flags) +{ + struct clk *clk; + + clk = _register_divider(dev, name, parent_name, flags, reg, shift, + width, clk_divider_flags, NULL); + if (IS_ERR(clk)) + return ERR_CAST(clk); + return clk; +} + +U_BOOT_DRIVER(ccf_clk_divider) = { + .name = UBOOT_DM_CLK_CCF_DIVIDER, + .id = UCLASS_CLK, + .ops = &clk_divider_ops, + .flags = DM_FLAG_PRE_RELOC, +}; diff --git a/drivers/clk/clk-fixed-factor.c b/drivers/clk/clk-fixed-factor.c new file mode 100644 index 0000000000..711b0588bc --- /dev/null +++ b/drivers/clk/clk-fixed-factor.c @@ -0,0 +1,80 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 DENX Software Engineering + * Lukasz Majewski, DENX Software Engineering, lukma@denx.de + * + * Copyright (C) 2011 Sascha Hauer, Pengutronix + */ +#include +#include +#include +#include +#include +#include +#include +#include "clk.h" + +#define UBOOT_DM_CLK_IMX_FIXED_FACTOR "ccf_clk_fixed_factor" + +static ulong clk_factor_recalc_rate(struct clk *clk) +{ + struct clk_fixed_factor *fix = + to_clk_fixed_factor(dev_get_clk_ptr(clk->dev)); + unsigned long parent_rate = clk_get_parent_rate(clk); + unsigned long long int rate; + + rate = (unsigned long long int)parent_rate * fix->mult; + do_div(rate, fix->div); + return (ulong)rate; +} + +const struct clk_ops ccf_clk_fixed_factor_ops = { + .get_rate = clk_factor_recalc_rate, +}; + +struct clk *clk_hw_register_fixed_factor(struct device *dev, + const char *name, const char *parent_name, unsigned long flags, + unsigned int mult, unsigned int div) +{ + struct clk_fixed_factor *fix; + struct clk *clk; + int ret; + + fix = kzalloc(sizeof(*fix), GFP_KERNEL); + if (!fix) + return ERR_PTR(-ENOMEM); + + /* struct clk_fixed_factor assignments */ + fix->mult = mult; + fix->div = div; + clk = &fix->clk; + + ret = clk_register(clk, UBOOT_DM_CLK_IMX_FIXED_FACTOR, name, + parent_name); + if (ret) { + kfree(fix); + return ERR_PTR(ret); + } + + return clk; +} + +struct clk *clk_register_fixed_factor(struct device *dev, const char *name, + const char *parent_name, unsigned long flags, + unsigned int mult, unsigned int div) +{ + struct clk *clk; + + clk = clk_hw_register_fixed_factor(dev, name, parent_name, flags, mult, + div); + if (IS_ERR(clk)) + return ERR_CAST(clk); + return clk; +} + +U_BOOT_DRIVER(imx_clk_fixed_factor) = { + .name = UBOOT_DM_CLK_IMX_FIXED_FACTOR, + .id = UCLASS_CLK, + .ops = &ccf_clk_fixed_factor_ops, + .flags = DM_FLAG_PRE_RELOC, +}; diff --git a/drivers/clk/clk-mux.c b/drivers/clk/clk-mux.c new file mode 100644 index 0000000000..14b9f2b1d9 --- /dev/null +++ b/drivers/clk/clk-mux.c @@ -0,0 +1,164 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 DENX Software Engineering + * Lukasz Majewski, DENX Software Engineering, lukma@denx.de + * + * Copyright (C) 2011 Sascha Hauer, Pengutronix + * Copyright (C) 2011 Richard Zhao, Linaro + * Copyright (C) 2011-2012 Mike Turquette, Linaro Ltd + * + * Simple multiplexer clock implementation + */ + +/* + * U-Boot CCF porting node: + * + * The Linux kernel - as of tag: 5.0-rc3 is using also the imx_clk_fixup_mux() + * version of CCF mux. It is used on e.g. imx6q to provide fixes (like + * imx_cscmr1_fixup) for broken HW. + * + * At least for IMX6Q (but NOT IMX6QP) it is important when we set the parent + * clock. + */ + +#include +#include +#include +#include +#include +#include +#include +#include "clk.h" + +#define UBOOT_DM_CLK_CCF_MUX "ccf_clk_mux" + +int clk_mux_val_to_index(struct clk *clk, u32 *table, unsigned int flags, + unsigned int val) +{ + struct clk_mux *mux = to_clk_mux(clk); + int num_parents = mux->num_parents; + + if (table) { + int i; + + for (i = 0; i < num_parents; i++) + if (table[i] == val) + return i; + return -EINVAL; + } + + if (val && (flags & CLK_MUX_INDEX_BIT)) + val = ffs(val) - 1; + + if (val && (flags & CLK_MUX_INDEX_ONE)) + val--; + + if (val >= num_parents) + return -EINVAL; + + return val; +} + +static u8 clk_mux_get_parent(struct clk *clk) +{ + struct clk_mux *mux = to_clk_mux(clk); + u32 val; + + val = readl(mux->reg) >> mux->shift; + val &= mux->mask; + + return clk_mux_val_to_index(clk, mux->table, mux->flags, val); +} + +const struct clk_ops clk_mux_ops = { + .get_rate = clk_generic_get_rate, +}; + +struct clk *clk_hw_register_mux_table(struct device *dev, const char *name, + const char * const *parent_names, u8 num_parents, + unsigned long flags, + void __iomem *reg, u8 shift, u32 mask, + u8 clk_mux_flags, u32 *table) +{ + struct clk_mux *mux; + struct clk *clk; + u8 width = 0; + int ret; + + if (clk_mux_flags & CLK_MUX_HIWORD_MASK) { + width = fls(mask) - ffs(mask) + 1; + if (width + shift > 16) { + pr_err("mux value exceeds LOWORD field\n"); + return ERR_PTR(-EINVAL); + } + } + + /* allocate the mux */ + mux = kzalloc(sizeof(*mux), GFP_KERNEL); + if (!mux) + return ERR_PTR(-ENOMEM); + + /* U-boot specific assignments */ + mux->parent_names = parent_names; + mux->num_parents = num_parents; + + /* struct clk_mux assignments */ + mux->reg = reg; + mux->shift = shift; + mux->mask = mask; + mux->flags = clk_mux_flags; + mux->table = table; + + clk = &mux->clk; + + /* + * Read the current mux setup - so we assign correct parent. + * + * Changing parent would require changing internals of udevice struct + * for the corresponding clock (to do that define .set_parent() method. + */ + ret = clk_register(clk, UBOOT_DM_CLK_CCF_MUX, name, + parent_names[clk_mux_get_parent(clk)]); + if (ret) { + kfree(mux); + return ERR_PTR(ret); + } + + return clk; +} + +struct clk *clk_register_mux_table(struct device *dev, const char *name, + const char * const *parent_names, u8 num_parents, + unsigned long flags, + void __iomem *reg, u8 shift, u32 mask, + u8 clk_mux_flags, u32 *table) +{ + struct clk *clk; + + clk = clk_hw_register_mux_table(dev, name, parent_names, num_parents, + flags, reg, shift, mask, clk_mux_flags, + table); + if (IS_ERR(clk)) + return ERR_CAST(clk); + return clk; +} + +struct clk *clk_register_mux(struct device *dev, const char *name, + const char * const *parent_names, u8 num_parents, + unsigned long flags, + void __iomem *reg, u8 shift, u8 width, + u8 clk_mux_flags) +{ + u32 mask = BIT(width) - 1; + + return clk_register_mux_table(dev, name, parent_names, num_parents, + flags, reg, shift, mask, clk_mux_flags, + NULL); +} + +U_BOOT_DRIVER(ccf_clk_mux) = { + .name = UBOOT_DM_CLK_CCF_MUX, + .id = UCLASS_CLK, + .ops = &clk_mux_ops, + .flags = DM_FLAG_PRE_RELOC, +}; diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c new file mode 100644 index 0000000000..7d748c9fc7 --- /dev/null +++ b/drivers/clk/clk.c @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2019 DENX Software Engineering + * Lukasz Majewski, DENX Software Engineering, lukma@denx.de + */ + +#include +#include +#include +#include +#include +#include +#include + +int clk_register(struct clk *clk, const char *drv_name, + const char *name, const char *parent_name) +{ + struct udevice *parent; + struct driver *drv; + int ret; + + ret = uclass_get_device_by_name(UCLASS_CLK, parent_name, &parent); + if (ret) + printf("%s: UCLASS parent: 0x%p\n", __func__, parent); + + debug("%s: name: %s parent: %s [0x%p]\n", __func__, name, parent->name, + parent); + + drv = lists_driver_lookup_name(drv_name); + if (!drv) { + printf("%s: %s is not a valid driver name\n", + __func__, drv_name); + return -ENOENT; + } + + ret = device_bind(parent, drv, name, NULL, -1, &clk->dev); + if (ret) { + printf("%s: CLK: %s driver bind error [%d]!\n", __func__, name, + ret); + return ret; + } + + /* Store back pointer to clk from udevice */ + clk->dev->uclass_priv = clk; + + return 0; +} + +ulong clk_generic_get_rate(struct clk *clk) +{ + return clk_get_parent_rate(clk); +} + +const char *clk_hw_get_name(const struct clk *hw) +{ + return hw->dev->name; +} diff --git a/drivers/clk/imx/Kconfig b/drivers/clk/imx/Kconfig index a6fb58d6cf..3e6a980c8c 100644 --- a/drivers/clk/imx/Kconfig +++ b/drivers/clk/imx/Kconfig @@ -1,3 +1,19 @@ +config SPL_CLK_IMX6Q + bool "SPL clock support for i.MX6Q" + depends on ARCH_MX6 && SPL + select SPL_CLK + select SPL_CLK_CCF + help + This enables SPL DM/DTS support for clock driver in i.MX6Q platforms. + +config CLK_IMX6Q + bool "Clock support for i.MX6Q" + depends on ARCH_MX6 + select CLK + select CLK_CCF + help + This enables DM/DTS support for clock driver in i.MX6Q platforms. + config CLK_IMX8 bool "Clock support for i.MX8" depends on ARCH_IMX8 diff --git a/drivers/clk/imx/Makefile b/drivers/clk/imx/Makefile index eb379c188a..105a58ca90 100644 --- a/drivers/clk/imx/Makefile +++ b/drivers/clk/imx/Makefile @@ -2,6 +2,8 @@ # # SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_$(SPL_TPL_)CLK_CCF) += clk-gate2.o clk-pllv3.o clk-pfd.o +obj-$(CONFIG_$(SPL_TPL_)CLK_IMX6Q) += clk-imx6q.o obj-$(CONFIG_CLK_IMX8) += clk-imx8.o ifdef CONFIG_CLK_IMX8 diff --git a/drivers/clk/imx/clk-gate2.c b/drivers/clk/imx/clk-gate2.c new file mode 100644 index 0000000000..571be32088 --- /dev/null +++ b/drivers/clk/imx/clk-gate2.c @@ -0,0 +1,103 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2019 DENX Software Engineering + * Lukasz Majewski, DENX Software Engineering, lukma@denx.de + * + * Copyright (C) 2010-2011 Canonical Ltd + * Copyright (C) 2011-2012 Mike Turquette, Linaro Ltd + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Gated clock implementation + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include "clk.h" + +#define UBOOT_DM_CLK_IMX_GATE2 "imx_clk_gate2" + +struct clk_gate2 { + struct clk clk; + void __iomem *reg; + u8 bit_idx; + u8 cgr_val; + u8 flags; +}; + +#define to_clk_gate2(_clk) container_of(_clk, struct clk_gate2, clk) + +static int clk_gate2_enable(struct clk *clk) +{ + struct clk_gate2 *gate = to_clk_gate2(dev_get_clk_ptr(clk->dev)); + u32 reg; + + reg = readl(gate->reg); + reg &= ~(3 << gate->bit_idx); + reg |= gate->cgr_val << gate->bit_idx; + writel(reg, gate->reg); + + return 0; +} + +static int clk_gate2_disable(struct clk *clk) +{ + struct clk_gate2 *gate = to_clk_gate2(dev_get_clk_ptr(clk->dev)); + u32 reg; + + reg = readl(gate->reg); + reg &= ~(3 << gate->bit_idx); + writel(reg, gate->reg); + + return 0; +} + +static const struct clk_ops clk_gate2_ops = { + .enable = clk_gate2_enable, + .disable = clk_gate2_disable, + .get_rate = clk_generic_get_rate, +}; + +struct clk *clk_register_gate2(struct device *dev, const char *name, + const char *parent_name, unsigned long flags, + void __iomem *reg, u8 bit_idx, u8 cgr_val, + u8 clk_gate2_flags) +{ + struct clk_gate2 *gate; + struct clk *clk; + int ret; + + gate = kzalloc(sizeof(*gate), GFP_KERNEL); + if (!gate) + return ERR_PTR(-ENOMEM); + + gate->reg = reg; + gate->bit_idx = bit_idx; + gate->cgr_val = cgr_val; + gate->flags = clk_gate2_flags; + + clk = &gate->clk; + + ret = clk_register(clk, UBOOT_DM_CLK_IMX_GATE2, name, parent_name); + if (ret) { + kfree(gate); + return ERR_PTR(ret); + } + + return clk; +} + +U_BOOT_DRIVER(clk_gate2) = { + .name = UBOOT_DM_CLK_IMX_GATE2, + .id = UCLASS_CLK, + .ops = &clk_gate2_ops, + .flags = DM_FLAG_PRE_RELOC, +}; diff --git a/drivers/clk/imx/clk-imx6q.c b/drivers/clk/imx/clk-imx6q.c new file mode 100644 index 0000000000..92e9337d44 --- /dev/null +++ b/drivers/clk/imx/clk-imx6q.c @@ -0,0 +1,179 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 DENX Software Engineering + * Lukasz Majewski, DENX Software Engineering, lukma@denx.de + */ + +#include +#include +#include +#include +#include +#include + +#include "clk.h" + +static int imx6q_check_id(ulong id) +{ + if (id < IMX6QDL_CLK_DUMMY || id >= IMX6QDL_CLK_END) { + printf("%s: Invalid clk ID #%lu\n", __func__, id); + return -EINVAL; + } + + return 0; +} + +static ulong imx6q_clk_get_rate(struct clk *clk) +{ + struct clk *c; + int ret; + + debug("%s(#%lu)\n", __func__, clk->id); + + ret = imx6q_check_id(clk->id); + if (ret) + return ret; + + ret = clk_get_by_id(clk->id, &c); + if (ret) + return ret; + + return clk_get_rate(c); +} + +static ulong imx6q_clk_set_rate(struct clk *clk, unsigned long rate) +{ + debug("%s(#%lu), rate: %lu\n", __func__, clk->id, rate); + + return rate; +} + +static int __imx6q_clk_enable(struct clk *clk, bool enable) +{ + struct clk *c; + int ret = 0; + + debug("%s(#%lu) en: %d\n", __func__, clk->id, enable); + + ret = imx6q_check_id(clk->id); + if (ret) + return ret; + + ret = clk_get_by_id(clk->id, &c); + if (ret) + return ret; + + if (enable) + ret = clk_enable(c); + else + ret = clk_disable(c); + + return ret; +} + +static int imx6q_clk_disable(struct clk *clk) +{ + return __imx6q_clk_enable(clk, 0); +} + +static int imx6q_clk_enable(struct clk *clk) +{ + return __imx6q_clk_enable(clk, 1); +} + +static struct clk_ops imx6q_clk_ops = { + .set_rate = imx6q_clk_set_rate, + .get_rate = imx6q_clk_get_rate, + .enable = imx6q_clk_enable, + .disable = imx6q_clk_disable, +}; + +static const char *const usdhc_sels[] = { "pll2_pfd2_396m", "pll2_pfd0_352m", }; + +static int imx6q_clk_probe(struct udevice *dev) +{ + void *base; + + /* Anatop clocks */ + base = (void *)ANATOP_BASE_ADDR; + + clk_dm(IMX6QDL_CLK_PLL2, + imx_clk_pllv3(IMX_PLLV3_GENERIC, "pll2_bus", "osc", + base + 0x30, 0x1)); + clk_dm(IMX6QDL_CLK_PLL3_USB_OTG, + imx_clk_pllv3(IMX_PLLV3_USB, "pll3_usb_otg", "osc", + base + 0x10, 0x3)); + clk_dm(IMX6QDL_CLK_PLL3_60M, + imx_clk_fixed_factor("pll3_60m", "pll3_usb_otg", 1, 8)); + clk_dm(IMX6QDL_CLK_PLL2_PFD0_352M, + imx_clk_pfd("pll2_pfd0_352m", "pll2_bus", base + 0x100, 0)); + clk_dm(IMX6QDL_CLK_PLL2_PFD2_396M, + imx_clk_pfd("pll2_pfd2_396m", "pll2_bus", base + 0x100, 2)); + + /* CCM clocks */ + base = dev_read_addr_ptr(dev); + if (base == (void *)FDT_ADDR_T_NONE) + return -EINVAL; + + clk_dm(IMX6QDL_CLK_USDHC1_SEL, + imx_clk_mux("usdhc1_sel", base + 0x1c, 16, 1, + usdhc_sels, ARRAY_SIZE(usdhc_sels))); + clk_dm(IMX6QDL_CLK_USDHC2_SEL, + imx_clk_mux("usdhc2_sel", base + 0x1c, 17, 1, + usdhc_sels, ARRAY_SIZE(usdhc_sels))); + clk_dm(IMX6QDL_CLK_USDHC3_SEL, + imx_clk_mux("usdhc3_sel", base + 0x1c, 18, 1, + usdhc_sels, ARRAY_SIZE(usdhc_sels))); + clk_dm(IMX6QDL_CLK_USDHC4_SEL, + imx_clk_mux("usdhc4_sel", base + 0x1c, 19, 1, + usdhc_sels, ARRAY_SIZE(usdhc_sels))); + + clk_dm(IMX6QDL_CLK_USDHC1_PODF, + imx_clk_divider("usdhc1_podf", "usdhc1_sel", + base + 0x24, 11, 3)); + clk_dm(IMX6QDL_CLK_USDHC2_PODF, + imx_clk_divider("usdhc2_podf", "usdhc2_sel", + base + 0x24, 16, 3)); + clk_dm(IMX6QDL_CLK_USDHC3_PODF, + imx_clk_divider("usdhc3_podf", "usdhc3_sel", + base + 0x24, 19, 3)); + clk_dm(IMX6QDL_CLK_USDHC4_PODF, + imx_clk_divider("usdhc4_podf", "usdhc4_sel", + base + 0x24, 22, 3)); + + clk_dm(IMX6QDL_CLK_ECSPI_ROOT, + imx_clk_divider("ecspi_root", "pll3_60m", base + 0x38, 19, 6)); + + clk_dm(IMX6QDL_CLK_ECSPI1, + imx_clk_gate2("ecspi1", "ecspi_root", base + 0x6c, 0)); + clk_dm(IMX6QDL_CLK_ECSPI2, + imx_clk_gate2("ecspi2", "ecspi_root", base + 0x6c, 2)); + clk_dm(IMX6QDL_CLK_ECSPI3, + imx_clk_gate2("ecspi3", "ecspi_root", base + 0x6c, 4)); + clk_dm(IMX6QDL_CLK_ECSPI4, + imx_clk_gate2("ecspi4", "ecspi_root", base + 0x6c, 6)); + clk_dm(IMX6QDL_CLK_USDHC1, + imx_clk_gate2("usdhc1", "usdhc1_podf", base + 0x80, 2)); + clk_dm(IMX6QDL_CLK_USDHC2, + imx_clk_gate2("usdhc2", "usdhc2_podf", base + 0x80, 4)); + clk_dm(IMX6QDL_CLK_USDHC3, + imx_clk_gate2("usdhc3", "usdhc3_podf", base + 0x80, 6)); + clk_dm(IMX6QDL_CLK_USDHC4, + imx_clk_gate2("usdhc4", "usdhc4_podf", base + 0x80, 8)); + + return 0; +} + +static const struct udevice_id imx6q_clk_ids[] = { + { .compatible = "fsl,imx6q-ccm" }, + { }, +}; + +U_BOOT_DRIVER(imx6q_clk) = { + .name = "clk_imx6q", + .id = UCLASS_CLK, + .of_match = imx6q_clk_ids, + .ops = &imx6q_clk_ops, + .probe = imx6q_clk_probe, + .flags = DM_FLAG_PRE_RELOC, +}; diff --git a/drivers/clk/imx/clk-pfd.c b/drivers/clk/imx/clk-pfd.c new file mode 100644 index 0000000000..188b2b3b90 --- /dev/null +++ b/drivers/clk/imx/clk-pfd.c @@ -0,0 +1,90 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2019 DENX Software Engineering + * Lukasz Majewski, DENX Software Engineering, lukma@denx.de + * + * Copyright 2012 Freescale Semiconductor, Inc. + * Copyright 2012 Linaro Ltd. + * + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include "clk.h" + +#define UBOOT_DM_CLK_IMX_PFD "imx_clk_pfd" + +struct clk_pfd { + struct clk clk; + void __iomem *reg; + u8 idx; +}; + +#define to_clk_pfd(_clk) container_of(_clk, struct clk_pfd, clk) + +#define SET 0x4 +#define CLR 0x8 +#define OTG 0xc + +static unsigned long clk_pfd_recalc_rate(struct clk *clk) +{ + struct clk_pfd *pfd = + to_clk_pfd(dev_get_clk_ptr(clk->dev)); + unsigned long parent_rate = clk_get_parent_rate(clk); + u64 tmp = parent_rate; + u8 frac = (readl(pfd->reg) >> (pfd->idx * 8)) & 0x3f; + + tmp *= 18; + do_div(tmp, frac); + + return tmp; +} + +static const struct clk_ops clk_pfd_ops = { + .get_rate = clk_pfd_recalc_rate, +}; + +struct clk *imx_clk_pfd(const char *name, const char *parent_name, + void __iomem *reg, u8 idx) +{ + struct clk_pfd *pfd; + struct clk *clk; + int ret; + + pfd = kzalloc(sizeof(*pfd), GFP_KERNEL); + if (!pfd) + return ERR_PTR(-ENOMEM); + + pfd->reg = reg; + pfd->idx = idx; + + /* register the clock */ + clk = &pfd->clk; + + ret = clk_register(clk, UBOOT_DM_CLK_IMX_PFD, name, parent_name); + if (ret) { + kfree(pfd); + return ERR_PTR(ret); + } + + return clk; +} + +U_BOOT_DRIVER(clk_pfd) = { + .name = UBOOT_DM_CLK_IMX_PFD, + .id = UCLASS_CLK, + .ops = &clk_pfd_ops, + .flags = DM_FLAG_PRE_RELOC, +}; diff --git a/drivers/clk/imx/clk-pllv3.c b/drivers/clk/imx/clk-pllv3.c new file mode 100644 index 0000000000..fbb7b24d5e --- /dev/null +++ b/drivers/clk/imx/clk-pllv3.c @@ -0,0 +1,82 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2019 DENX Software Engineering + * Lukasz Majewski, DENX Software Engineering, lukma@denx.de + */ + +#include +#include +#include +#include +#include +#include +#include +#include "clk.h" + +#define UBOOT_DM_CLK_IMX_PLLV3 "imx_clk_pllv3" + +struct clk_pllv3 { + struct clk clk; + void __iomem *base; + u32 div_mask; + u32 div_shift; +}; + +#define to_clk_pllv3(_clk) container_of(_clk, struct clk_pllv3, clk) + +static ulong clk_pllv3_get_rate(struct clk *clk) +{ + struct clk_pllv3 *pll = to_clk_pllv3(dev_get_clk_ptr(clk->dev)); + unsigned long parent_rate = clk_get_parent_rate(clk); + + u32 div = (readl(pll->base) >> pll->div_shift) & pll->div_mask; + + return (div == 1) ? parent_rate * 22 : parent_rate * 20; +} + +static const struct clk_ops clk_pllv3_generic_ops = { + .get_rate = clk_pllv3_get_rate, +}; + +struct clk *imx_clk_pllv3(enum imx_pllv3_type type, const char *name, + const char *parent_name, void __iomem *base, + u32 div_mask) +{ + struct clk_pllv3 *pll; + struct clk *clk; + char *drv_name; + int ret; + + pll = kzalloc(sizeof(*pll), GFP_KERNEL); + if (!pll) + return ERR_PTR(-ENOMEM); + + switch (type) { + case IMX_PLLV3_GENERIC: + case IMX_PLLV3_USB: + drv_name = UBOOT_DM_CLK_IMX_PLLV3; + break; + default: + kfree(pll); + return ERR_PTR(-ENOTSUPP); + } + + pll->base = base; + pll->div_mask = div_mask; + clk = &pll->clk; + + ret = clk_register(clk, drv_name, name, parent_name); + if (ret) { + kfree(pll); + return ERR_PTR(ret); + } + + return clk; +} + +U_BOOT_DRIVER(clk_pllv3_generic) = { + .name = UBOOT_DM_CLK_IMX_PLLV3, + .id = UCLASS_CLK, + .ops = &clk_pllv3_generic_ops, + .flags = DM_FLAG_PRE_RELOC, +}; diff --git a/drivers/clk/imx/clk.h b/drivers/clk/imx/clk.h new file mode 100644 index 0000000000..e6d51830e8 --- /dev/null +++ b/drivers/clk/imx/clk.h @@ -0,0 +1,69 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2019 DENX Software Engineering + * Lukasz Majewski, DENX Software Engineering, lukma@denx.de + */ +#ifndef __MACH_IMX_CLK_H +#define __MACH_IMX_CLK_H + +#include + +enum imx_pllv3_type { + IMX_PLLV3_GENERIC, + IMX_PLLV3_SYS, + IMX_PLLV3_USB, + IMX_PLLV3_USB_VF610, + IMX_PLLV3_AV, + IMX_PLLV3_ENET, + IMX_PLLV3_ENET_IMX7, + IMX_PLLV3_SYS_VF610, + IMX_PLLV3_DDR_IMX7, +}; + +struct clk *clk_register_gate2(struct device *dev, const char *name, + const char *parent_name, unsigned long flags, + void __iomem *reg, u8 bit_idx, u8 cgr_val, + u8 clk_gate_flags); + +struct clk *imx_clk_pllv3(enum imx_pllv3_type type, const char *name, + const char *parent_name, void __iomem *base, + u32 div_mask); + +static inline struct clk *imx_clk_gate2(const char *name, const char *parent, + void __iomem *reg, u8 shift) +{ + return clk_register_gate2(NULL, name, parent, CLK_SET_RATE_PARENT, reg, + shift, 0x3, 0); +} + +static inline struct clk *imx_clk_fixed_factor(const char *name, + const char *parent, unsigned int mult, unsigned int div) +{ + return clk_register_fixed_factor(NULL, name, parent, + CLK_SET_RATE_PARENT, mult, div); +} + +static inline struct clk *imx_clk_divider(const char *name, const char *parent, + void __iomem *reg, u8 shift, u8 width) +{ + return clk_register_divider(NULL, name, parent, CLK_SET_RATE_PARENT, + reg, shift, width, 0); +} + +struct clk *imx_clk_pfd(const char *name, const char *parent_name, + void __iomem *reg, u8 idx); + +struct clk *imx_clk_fixup_mux(const char *name, void __iomem *reg, + u8 shift, u8 width, const char * const *parents, + int num_parents, void (*fixup)(u32 *val)); + +static inline struct clk *imx_clk_mux(const char *name, void __iomem *reg, + u8 shift, u8 width, const char * const *parents, + int num_parents) +{ + return clk_register_mux(NULL, name, parents, num_parents, + CLK_SET_RATE_NO_REPARENT, reg, shift, + width, 0); +} + +#endif /* __MACH_IMX_CLK_H */ diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index 6adf0a5791..e06487f07b 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -9,6 +9,115 @@ #ifndef __LINUX_CLK_PROVIDER_H #define __LINUX_CLK_PROVIDER_H +static inline void clk_dm(ulong id, struct clk *clk) +{ + if (!IS_ERR(clk)) + clk->id = id; +} + +/* + * flags used across common struct clk. these flags should only affect the + * top-level framework. custom flags for dealing with hardware specifics + * belong in struct clk_foo + * + * Please update clk_flags[] in drivers/clk/clk.c when making changes here! + */ +#define CLK_SET_RATE_GATE BIT(0) /* must be gated across rate change */ +#define CLK_SET_PARENT_GATE BIT(1) /* must be gated across re-parent */ +#define CLK_SET_RATE_PARENT BIT(2) /* propagate rate change up one level */ +#define CLK_IGNORE_UNUSED BIT(3) /* do not gate even if unused */ + /* unused */ +#define CLK_IS_BASIC BIT(5) /* Basic clk, can't do a to_clk_foo() */ +#define CLK_GET_RATE_NOCACHE BIT(6) /* do not use the cached clk rate */ +#define CLK_SET_RATE_NO_REPARENT BIT(7) /* don't re-parent on rate change */ +#define CLK_GET_ACCURACY_NOCACHE BIT(8) /* do not use the cached clk accuracy */ +#define CLK_RECALC_NEW_RATES BIT(9) /* recalc rates after notifications */ +#define CLK_SET_RATE_UNGATE BIT(10) /* clock needs to run to set rate */ +#define CLK_IS_CRITICAL BIT(11) /* do not gate, ever */ +/* parents need enable during gate/ungate, set rate and re-parent */ +#define CLK_OPS_PARENT_ENABLE BIT(12) +/* duty cycle call may be forwarded to the parent clock */ +#define CLK_DUTY_CYCLE_PARENT BIT(13) + +#define CLK_MUX_INDEX_ONE BIT(0) +#define CLK_MUX_INDEX_BIT BIT(1) +#define CLK_MUX_HIWORD_MASK BIT(2) +#define CLK_MUX_READ_ONLY BIT(3) /* mux can't be changed */ +#define CLK_MUX_ROUND_CLOSEST BIT(4) + +struct clk_mux { + struct clk clk; + void __iomem *reg; + u32 *table; + u32 mask; + u8 shift; + u8 flags; + + /* + * Fields from struct clk_init_data - this struct has been + * omitted to avoid too deep level of CCF for bootloader + */ + const char * const *parent_names; + u8 num_parents; +}; + +#define to_clk_mux(_clk) container_of(_clk, struct clk_mux, clk) + +struct clk_div_table { + unsigned int val; + unsigned int div; +}; + +struct clk_divider { + struct clk clk; + void __iomem *reg; + u8 shift; + u8 width; + u8 flags; + const struct clk_div_table *table; +}; + +#define clk_div_mask(width) ((1 << (width)) - 1) +#define to_clk_divider(_clk) container_of(_clk, struct clk_divider, clk) + +#define CLK_DIVIDER_ONE_BASED BIT(0) +#define CLK_DIVIDER_POWER_OF_TWO BIT(1) +#define CLK_DIVIDER_ALLOW_ZERO BIT(2) +#define CLK_DIVIDER_HIWORD_MASK BIT(3) +#define CLK_DIVIDER_ROUND_CLOSEST BIT(4) +#define CLK_DIVIDER_READ_ONLY BIT(5) +#define CLK_DIVIDER_MAX_AT_ZERO BIT(6) + +struct clk_fixed_factor { + struct clk clk; + unsigned int mult; + unsigned int div; +}; + +#define to_clk_fixed_factor(_clk) container_of(_clk, struct clk_fixed_factor,\ + clk) + +int clk_register(struct clk *clk, const char *drv_name, const char *name, + const char *parent_name); + +struct clk *clk_register_fixed_factor(struct device *dev, const char *name, + const char *parent_name, unsigned long flags, + unsigned int mult, unsigned int div); + +struct clk *clk_register_divider(struct device *dev, const char *name, + const char *parent_name, unsigned long flags, + void __iomem *reg, u8 shift, u8 width, + u8 clk_divider_flags); + +struct clk *clk_register_mux(struct device *dev, const char *name, + const char * const *parent_names, u8 num_parents, + unsigned long flags, + void __iomem *reg, u8 shift, u8 width, + u8 clk_mux_flags); + +const char *clk_hw_get_name(const struct clk *hw); +ulong clk_generic_get_rate(struct clk *clk); + static inline struct clk *dev_get_clk_ptr(struct udevice *dev) { return (struct clk *)dev_get_uclass_priv(dev);