[PATCH v5 4/7] clk: Add Microchip PolarFire SoC clock driver
Bin Meng
bmeng.cn at gmail.com
Thu Dec 10 11:55:18 CET 2020
On Thu, Dec 10, 2020 at 6:04 PM Bin Meng <bmeng.cn at gmail.com> wrote:
>
> On Thu, Dec 3, 2020 at 4:44 AM Padmarao Begari
> <padmarao.begari at microchip.com> wrote:
> >
> > Add clock driver code for the Microchip PolarFire SoC. This driver
> > handles reset and clock control of the Microchip PolarFire SoC device.
> >
> > Signed-off-by: Padmarao Begari <padmarao.begari at microchip.com>
> > Reviewed-by: Anup Patel <anup.patel at wdc.com>
> > ---
> > drivers/clk/Kconfig | 1 +
> > drivers/clk/Makefile | 1 +
> > drivers/clk/microchip/Kconfig | 5 +
> > drivers/clk/microchip/Makefile | 1 +
> > drivers/clk/microchip/mpfs_clk.c | 127 +++++++++++++
> > drivers/clk/microchip/mpfs_clk.h | 19 ++
> > drivers/clk/microchip/mpfs_clk_cfg.c | 134 ++++++++++++++
> > drivers/clk/microchip/mpfs_clk_periph.c | 173 ++++++++++++++++++
> > .../dt-bindings/clock/microchip,mpfs-clock.h | 45 +++++
> > 9 files changed, 506 insertions(+)
> > create mode 100644 drivers/clk/microchip/Kconfig
> > create mode 100644 drivers/clk/microchip/Makefile
> > create mode 100644 drivers/clk/microchip/mpfs_clk.c
> > create mode 100644 drivers/clk/microchip/mpfs_clk.h
> > create mode 100644 drivers/clk/microchip/mpfs_clk_cfg.c
> > create mode 100644 drivers/clk/microchip/mpfs_clk_periph.c
> > create mode 100644 include/dt-bindings/clock/microchip,mpfs-clock.h
> >
> > diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
> > index 4dfbad7986..1161fe7b5a 100644
> > --- a/drivers/clk/Kconfig
> > +++ b/drivers/clk/Kconfig
> > @@ -173,6 +173,7 @@ source "drivers/clk/exynos/Kconfig"
> > source "drivers/clk/imx/Kconfig"
> > source "drivers/clk/kendryte/Kconfig"
> > source "drivers/clk/meson/Kconfig"
> > +source "drivers/clk/microchip/Kconfig"
> > source "drivers/clk/mvebu/Kconfig"
> > source "drivers/clk/owl/Kconfig"
> > source "drivers/clk/renesas/Kconfig"
> > diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
> > index d1e295ac7c..bd8a6eed88 100644
> > --- a/drivers/clk/Makefile
> > +++ b/drivers/clk/Makefile
> > @@ -28,6 +28,7 @@ obj-$(CONFIG_CLK_EXYNOS) += exynos/
> > obj-$(CONFIG_$(SPL_TPL_)CLK_INTEL) += intel/
> > obj-$(CONFIG_CLK_HSDK) += clk-hsdk-cgu.o
> > obj-$(CONFIG_CLK_K210) += kendryte/
> > +obj-$(CONFIG_CLK_MPFS) += microchip/
> > obj-$(CONFIG_CLK_MPC83XX) += mpc83xx_clk.o
> > obj-$(CONFIG_CLK_OCTEON) += clk_octeon.o
> > obj-$(CONFIG_CLK_OWL) += owl/
> > diff --git a/drivers/clk/microchip/Kconfig b/drivers/clk/microchip/Kconfig
> > new file mode 100644
> > index 0000000000..b70241559d
> > --- /dev/null
> > +++ b/drivers/clk/microchip/Kconfig
> > @@ -0,0 +1,5 @@
> > +config CLK_MPFS
> > + bool "Clock support for Microchip PolarFire SoC"
> > + depends on CLK && CLK_CCF
> > + help
> > + This enables support clock driver for Microchip PolarFire SoC platform.
> > diff --git a/drivers/clk/microchip/Makefile b/drivers/clk/microchip/Makefile
> > new file mode 100644
> > index 0000000000..904b345d75
> > --- /dev/null
> > +++ b/drivers/clk/microchip/Makefile
> > @@ -0,0 +1 @@
> > +obj-y += mpfs_clk.o mpfs_clk_cfg.o mpfs_clk_periph.o
> > diff --git a/drivers/clk/microchip/mpfs_clk.c b/drivers/clk/microchip/mpfs_clk.c
> > new file mode 100644
> > index 0000000000..1b1b66ef64
> > --- /dev/null
> > +++ b/drivers/clk/microchip/mpfs_clk.c
> > @@ -0,0 +1,127 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> > +/*
> > + * Copyright (C) 2020 Microchip Technology Inc.
> > + * Padmarao Begari <padmarao.begari at microchip.com>
> > + */
> > +#include <common.h>
> > +#include <clk.h>
> > +#include <clk-uclass.h>
> > +#include <dm.h>
> > +#include <log.h>
> > +#include <dm/device.h>
> > +#include <dm/devres.h>
> > +#include <dm/uclass.h>
> > +#include <malloc.h>
> > +#include <linux/err.h>
> > +
> > +#include "mpfs_clk.h"
> > +
> > +/* All methods are delegated to CCF clocks */
> > +
> > +static ulong mpfs_clk_get_rate(struct clk *clk)
> > +{
> > + struct clk *c;
> > + int err = clk_get_by_id(clk->id, &c);
> > +
> > + if (err)
> > + return err;
> > + return clk_get_rate(c);
> > +}
> > +
> > +static ulong mpfs_clk_set_rate(struct clk *clk, unsigned long rate)
> > +{
> > + struct clk *c;
> > + int err = clk_get_by_id(clk->id, &c);
> > +
> > + if (err)
> > + return err;
> > + return clk_set_rate(c, rate);
> > +}
> > +
> > +static int mpfs_clk_set_parent(struct clk *clk, struct clk *parent)
> > +{
> > + struct clk *c, *p;
> > + int err = clk_get_by_id(clk->id, &c);
> > +
> > + if (err)
> > + return err;
> > +
> > + err = clk_get_by_id(parent->id, &p);
> > + if (err)
> > + return err;
> > +
> > + return clk_set_parent(c, p);
> > +}
> > +
> > +static int mpfs_clk_endisable(struct clk *clk, bool enable)
> > +{
> > + struct clk *c;
> > + int err = clk_get_by_id(clk->id, &c);
> > +
> > + if (err)
> > + return err;
> > + return enable ? clk_enable(c) : clk_disable(c);
> > +}
> > +
> > +static int mpfs_clk_enable(struct clk *clk)
> > +{
> > + return mpfs_clk_endisable(clk, true);
> > +}
> > +
> > +static int mpfs_clk_disable(struct clk *clk)
> > +{
> > + return mpfs_clk_endisable(clk, false);
> > +}
> > +
> > +static int mpfs_clk_probe(struct udevice *dev)
> > +{
> > + int ret;
> > + void __iomem *base;
> > + u32 clk_rate;
> > + struct clk *clk;
> > + const char *parent_clk_name;
> > +
> > + base = dev_read_addr_ptr(dev);
> > + if (!base)
> > + return -ENODEV;
> > +
> > + clk = kzalloc(sizeof(*clk), GFP_KERNEL);
> > + if (!clk)
> > + return -ENOMEM;
> > +
> > + ret = clk_get_by_index(dev, 0, clk);
> > + if (ret)
> > + return ret;
> > +
> > + dev_read_u32(clk->dev, "clock-frequency", &clk_rate);
> > + parent_clk_name = clk->dev->name;
> > +
> > + ret = mpfs_clk_register_cfgs(base, clk_rate, parent_clk_name);
> > + if (ret)
> > + return ret;
> > +
> > + ret = mpfs_clk_register_periphs(base, clk_rate, "clk_ahb");
> > +
> > + return ret;
> > +}
> > +
> > +static const struct clk_ops mpfs_clk_ops = {
> > + .set_rate = mpfs_clk_set_rate,
> > + .get_rate = mpfs_clk_get_rate,
> > + .set_parent = mpfs_clk_set_parent,
> > + .enable = mpfs_clk_enable,
> > + .disable = mpfs_clk_disable,
> > +};
> > +
> > +static const struct udevice_id mpfs_of_match[] = {
> > + { .compatible = "microchip,mpfs-clkcfg" },
> > + { }
> > +};
> > +
> > +U_BOOT_DRIVER(mpfs_clk) = {
> > + .name = "mpfs_clk",
> > + .id = UCLASS_CLK,
> > + .of_match = mpfs_of_match,
> > + .ops = &mpfs_clk_ops,
> > + .probe = mpfs_clk_probe,
> > +};
> > diff --git a/drivers/clk/microchip/mpfs_clk.h b/drivers/clk/microchip/mpfs_clk.h
> > new file mode 100644
> > index 0000000000..432547cbf2
> > --- /dev/null
> > +++ b/drivers/clk/microchip/mpfs_clk.h
> > @@ -0,0 +1,19 @@
> > +/* SPDX-License-Identifier: GPL-2.0+ */
> > +/*
> > + * Copyright (C) 2020 Microchip Technology Inc.
> > + * Padmarao Begari <padmarao.begari at microchip.com>
> > + */
> > +#ifndef __MICROCHIP_MPFS_CLK_H
> > +#define __MICROCHIP_MPFS_CLK_H
> > +
> > +#include <linux/clk-provider.h>
> > +
> > +int mpfs_clk_register_cfgs(void __iomem *base, u32 clk_rate,
> > + const char *parent_name);
> > +int mpfs_clk_register_periphs(void __iomem *base, u32 clk_rate,
> > + const char *parent_name);
> > +int divider_get_val(unsigned long rate, unsigned long parent_rate,
> > + const struct clk_div_table *table,
> > + u8 width, unsigned long flags);
> > +
> > +#endif /* __MICROCHIP_MPFS_CLK_H */
> > diff --git a/drivers/clk/microchip/mpfs_clk_cfg.c b/drivers/clk/microchip/mpfs_clk_cfg.c
> > new file mode 100644
> > index 0000000000..ac8ed07fff
> > --- /dev/null
> > +++ b/drivers/clk/microchip/mpfs_clk_cfg.c
> > @@ -0,0 +1,134 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> > +/*
> > + * Copyright (C) 2020 Microchip Technology Inc.
> > + * Padmarao Begari <padmarao.begari at microchip.com>
> > + */
> > +#include <common.h>
> > +#include <clk.h>
> > +#include <clk-uclass.h>
> > +#include <dm/device.h>
> > +#include <dm/devres.h>
> > +#include <dm/uclass.h>
> > +#include <asm/io.h>
> > +#include <linux/err.h>
> > +#include <dt-bindings/clock/microchip,mpfs-clock.h>
> > +
> > +#include "mpfs_clk.h"
> > +
> > +#define MPFS_CFG_CLOCK "mpfs_cfg_clock"
> > +
> > +#define REG_CLOCK_CONFIG_CR 0x08
> > +
> > +static const struct clk_div_table mpfs_div_cpu_axi_table[] = {
> > + { 0, 1 }, { 1, 2 }, { 2, 4 }, { 3, 8 },
> > + { 0, 0 }
> > +};
> > +
> > +static const struct clk_div_table mpfs_div_ahb_table[] = {
> > + { 1, 2 }, { 2, 4}, { 3, 8 },
> > + { 0, 0 }
> > +};
> > +
> > +struct mpfs_cfg_clock {
> > + unsigned int id;
> > + const char *name;
> > + u8 shift;
> > + u8 width;
> > + const struct clk_div_table *table;
> > + unsigned long flags;
> > +};
> > +
> > +struct mpfs_cfg_hw_clock {
> > + struct mpfs_cfg_clock cfg;
> > + void __iomem *sys_base;
> > + u32 prate;
> > + struct clk hw;
> > +};
> > +
> > +#define to_mpfs_cfg_clk(_hw) container_of(_hw, struct mpfs_cfg_hw_clock, hw)
> > +
> > +static ulong mpfs_cfg_clk_recalc_rate(struct clk *hw)
> > +{
> > + struct mpfs_cfg_hw_clock *cfg_hw = to_mpfs_cfg_clk(hw);
> > + struct mpfs_cfg_clock *cfg = &cfg_hw->cfg;
> > + void __iomem *base_addr = cfg_hw->sys_base;
> > + unsigned long rate;
> > + u32 val;
> > +
> > + val = readl(base_addr + REG_CLOCK_CONFIG_CR) >> cfg->shift;
> > + val &= clk_div_mask(cfg->width);
> > + rate = cfg_hw->prate / (1u << val);
> > + hw->rate = rate;
> > +
> > + return rate;
> > +}
> > +
> > +static ulong mpfs_cfg_clk_set_rate(struct clk *hw, ulong rate)
> > +{
> > + struct mpfs_cfg_hw_clock *cfg_hw = to_mpfs_cfg_clk(hw);
> > + struct mpfs_cfg_clock *cfg = &cfg_hw->cfg;
> > + void __iomem *base_addr = cfg_hw->sys_base;
> > + u32 val;
> > + int divider_setting;
> > +
> > + divider_setting = divider_get_val(rate, cfg_hw->prate, cfg->table, cfg->width, cfg->flags);
> > +
> > + if (divider_setting < 0)
> > + return divider_setting;
> > +
> > + val = readl(base_addr + REG_CLOCK_CONFIG_CR);
> > + val &= ~(clk_div_mask(cfg->width) << cfg_hw->cfg.shift);
> > + val |= divider_setting << cfg->shift;
> > + writel(val, base_addr + REG_CLOCK_CONFIG_CR);
> > +
> > + return clk_get_rate(hw);
> > +}
> > +
> > +#define CLK_CFG(_id, _name, _shift, _width, _table, _flags) { \
> > + .cfg.id = _id, \
> > + .cfg.name = _name, \
> > + .cfg.shift = _shift, \
> > + .cfg.width = _width, \
> > + .cfg.table = _table, \
> > + .cfg.flags = _flags, \
> > + }
> > +
> > +static struct mpfs_cfg_hw_clock mpfs_cfg_clks[] = {
> > + CLK_CFG(CLK_CPU, "clk_cpu", 0, 2, mpfs_div_cpu_axi_table, 0),
> > + CLK_CFG(CLK_AXI, "clk_axi", 2, 2, mpfs_div_cpu_axi_table, 0),
> > + CLK_CFG(CLK_AHB, "clk_ahb", 4, 2, mpfs_div_ahb_table, 0),
> > +};
> > +
> > +int mpfs_clk_register_cfgs(void __iomem *base, u32 clk_rate,
> > + const char *parent_name)
> > +{
> > + int ret;
> > + int i, id, num_clks;
> > + const char *name;
> > + struct clk *hw;
> > +
> > + num_clks = ARRAY_SIZE(mpfs_cfg_clks);
> > + for (i = 0; i < num_clks; i++) {
> > + hw = &mpfs_cfg_clks[i].hw;
> > + mpfs_cfg_clks[i].sys_base = base;
> > + mpfs_cfg_clks[i].prate = clk_rate;
> > + name = mpfs_cfg_clks[i].cfg.name;
> > + ret = clk_register(hw, MPFS_CFG_CLOCK, name, parent_name);
> > + if (ret)
> > + ERR_PTR(ret);
> > + id = mpfs_cfg_clks[i].cfg.id;
> > + clk_dm(id, hw);
> > + }
> > + return 0;
> > +}
> > +
> > +const struct clk_ops mpfs_cfg_clk_ops = {
> > + .set_rate = mpfs_cfg_clk_set_rate,
> > + .get_rate = mpfs_cfg_clk_recalc_rate,
> > +};
> > +
> > +U_BOOT_DRIVER(mpfs_cfg_clock) = {
> > + .name = MPFS_CFG_CLOCK,
> > + .id = UCLASS_CLK,
> > + .ops = &mpfs_cfg_clk_ops,
> > +};
> > diff --git a/drivers/clk/microchip/mpfs_clk_periph.c b/drivers/clk/microchip/mpfs_clk_periph.c
> > new file mode 100644
> > index 0000000000..066f60f060
> > --- /dev/null
> > +++ b/drivers/clk/microchip/mpfs_clk_periph.c
> > @@ -0,0 +1,173 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> > +/*
> > + * Copyright (C) 2020 Microchip Technology Inc.
> > + * Padmarao Begari <padmarao.begari at microchip.com>
> > + */
> > +#include <common.h>
> > +#include <clk.h>
> > +#include <clk-uclass.h>
> > +#include <dm/device.h>
> > +#include <dm/devres.h>
> > +#include <dm/uclass.h>
> > +#include <asm/io.h>
> > +#include <linux/err.h>
> > +#include <dt-bindings/clock/microchip,mpfs-clock.h>
> > +
> > +#include "mpfs_clk.h"
> > +
> > +#define MPFS_PERIPH_CLOCK "mpfs_periph_clock"
> > +
> > +#define REG_CLOCK_CONFIG_CR 0x08
> > +#define REG_SUBBLK_CLOCK_CR 0x84
> > +#define REG_SUBBLK_RESET_CR 0x88
> > +
> > +#define CFG_CPU_SHIFT 0x0
> > +#define CFG_AXI_SHIFT 0x2
> > +#define CFG_AHB_SHIFT 0x4
> > +#define CFG_WIDTH 0x2
> > +
> > +struct mpfs_periph_clock {
> > + unsigned int id;
> > + const char *name;
> > + u8 shift;
> > + unsigned long flags;
> > +};
> > +
> > +struct mpfs_periph_hw_clock {
> > + struct mpfs_periph_clock periph;
> > + void __iomem *sys_base;
> > + u32 prate;
> > + struct clk hw;
> > +};
> > +
> > +#define to_mpfs_periph_clk(_hw) container_of(_hw, struct mpfs_periph_hw_clock, hw)
> > +
> > +static int mpfs_periph_clk_enable(struct clk *hw)
> > +{
> > + struct mpfs_periph_hw_clock *periph_hw = to_mpfs_periph_clk(hw);
> > + struct mpfs_periph_clock *periph = &periph_hw->periph;
> > + void __iomem *base_addr = periph_hw->sys_base;
> > + u32 reg, val;
> > +
> > + if (periph->flags != CLK_IS_CRITICAL) {
> > + reg = readl(base_addr + REG_SUBBLK_RESET_CR);
> > + val = reg & ~(1u << periph->shift);
> > + writel(val, base_addr + REG_SUBBLK_RESET_CR);
> > +
> > + reg = readl(base_addr + REG_SUBBLK_CLOCK_CR);
> > + val = reg | (1u << periph->shift);
> > + writel(val, base_addr + REG_SUBBLK_CLOCK_CR);
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static int mpfs_periph_clk_disable(struct clk *hw)
> > +{
> > + struct mpfs_periph_hw_clock *periph_hw = to_mpfs_periph_clk(hw);
> > + struct mpfs_periph_clock *periph = &periph_hw->periph;
> > + void __iomem *base_addr = periph_hw->sys_base;
> > + u32 reg, val;
> > +
> > + if (periph->flags != CLK_IS_CRITICAL) {
> > + reg = readl(base_addr + REG_SUBBLK_RESET_CR);
> > + val = reg | (1u << periph->shift);
> > + writel(val, base_addr + REG_SUBBLK_RESET_CR);
> > +
> > + reg = readl(base_addr + REG_SUBBLK_CLOCK_CR);
> > + val = reg & ~(1u << periph->shift);
> > + writel(val, base_addr + REG_SUBBLK_CLOCK_CR);
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static ulong mpfs_periph_clk_recalc_rate(struct clk *hw)
> > +{
> > + struct mpfs_periph_hw_clock *periph_hw = to_mpfs_periph_clk(hw);
> > + void __iomem *base_addr = periph_hw->sys_base;
> > + unsigned long rate;
> > + u32 val;
> > +
> > + val = readl(base_addr + REG_CLOCK_CONFIG_CR) >> CFG_AHB_SHIFT;
> > + val &= clk_div_mask(CFG_WIDTH);
> > + rate = periph_hw->prate / (1u << val);
> > + hw->rate = rate;
> > +
> > + return rate;
> > +}
> > +
> > +#define CLK_PERIPH(_id, _name, _shift, _flags) { \
> > + .periph.id = _id, \
> > + .periph.name = _name, \
> > + .periph.shift = _shift, \
> > + .periph.flags = _flags, \
> > + }
> > +
> > +static struct mpfs_periph_hw_clock mpfs_periph_clks[] = {
> > + CLK_PERIPH(CLK_ENVM, "clk_periph_envm", 0, CLK_IS_CRITICAL),
> > + CLK_PERIPH(CLK_MAC0, "clk_periph_mac0", 1, 0),
> > + CLK_PERIPH(CLK_MAC1, "clk_periph_mac1", 2, 0),
> > + CLK_PERIPH(CLK_MMC, "clk_periph_mmc", 3, 0),
> > + CLK_PERIPH(CLK_TIMER, "clk_periph_timer", 4, 0),
> > + CLK_PERIPH(CLK_MMUART0, "clk_periph_mmuart0", 5, 0),
> > + CLK_PERIPH(CLK_MMUART1, "clk_periph_mmuart1", 6, 0),
> > + CLK_PERIPH(CLK_MMUART2, "clk_periph_mmuart2", 7, 0),
> > + CLK_PERIPH(CLK_MMUART3, "clk_periph_mmuart3", 8, 0),
> > + CLK_PERIPH(CLK_MMUART4, "clk_periph_mmuart4", 9, 0),
> > + CLK_PERIPH(CLK_SPI0, "clk_periph_spi0", 10, 0),
> > + CLK_PERIPH(CLK_SPI1, "clk_periph_spi1", 11, 0),
> > + CLK_PERIPH(CLK_I2C0, "clk_periph_i2c0", 12, 0),
> > + CLK_PERIPH(CLK_I2C1, "clk_periph_i2c1", 13, 0),
> > + CLK_PERIPH(CLK_CAN0, "clk_periph_can0", 14, 0),
> > + CLK_PERIPH(CLK_CAN1, "clk_periph_can1", 15, 0),
> > + CLK_PERIPH(CLK_USB, "clk_periph_usb", 16, 0),
> > + CLK_PERIPH(CLK_RTC, "clk_periph_rtc", 18, 0),
> > + CLK_PERIPH(CLK_QSPI, "clk_periph_qspi", 19, 0),
> > + CLK_PERIPH(CLK_GPIO0, "clk_periph_gpio0", 20, 0),
> > + CLK_PERIPH(CLK_GPIO1, "clk_periph_gpio1", 21, 0),
> > + CLK_PERIPH(CLK_GPIO2, "clk_periph_gpio2", 22, 0),
> > + CLK_PERIPH(CLK_DDRC, "clk_periph_ddrc", 23, CLK_IS_CRITICAL),
> > + CLK_PERIPH(CLK_FIC0, "clk_periph_fic0", 24, 0),
> > + CLK_PERIPH(CLK_FIC1, "clk_periph_fic1", 25, 0),
> > + CLK_PERIPH(CLK_FIC2, "clk_periph_fic2", 26, 0),
> > + CLK_PERIPH(CLK_FIC3, "clk_periph_fic3", 27, 0),
> > + CLK_PERIPH(CLK_ATHENA, "clk_periph_athena", 28, 0),
> > + CLK_PERIPH(CLK_CFM, "clk_periph_cfm", 29, 0),
> > +};
> > +
> > +int mpfs_clk_register_periphs(void __iomem *base, u32 clk_rate,
> > + const char *parent_name)
> > +{
> > + int ret;
> > + int i, id, num_clks;
> > + const char *name;
> > + struct clk *hw;
> > +
> > + num_clks = ARRAY_SIZE(mpfs_periph_clks);
> > + for (i = 0; i < num_clks; i++) {
> > + hw = &mpfs_periph_clks[i].hw;
> > + mpfs_periph_clks[i].sys_base = base;
> > + mpfs_periph_clks[i].prate = clk_rate;
> > + name = mpfs_periph_clks[i].periph.name;
> > + ret = clk_register(hw, MPFS_PERIPH_CLOCK, name, parent_name);
> > + if (ret)
> > + ERR_PTR(ret);
> > + id = mpfs_periph_clks[i].periph.id;
> > + clk_dm(id, hw);
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +const struct clk_ops mpfs_periph_clk_ops = {
> > + .enable = mpfs_periph_clk_enable,
> > + .disable = mpfs_periph_clk_disable,
> > + .get_rate = mpfs_periph_clk_recalc_rate,
> > +};
> > +
> > +U_BOOT_DRIVER(mpfs_periph_clock) = {
> > + .name = MPFS_PERIPH_CLOCK,
> > + .id = UCLASS_CLK,
> > + .ops = &mpfs_periph_clk_ops,
> > +};
> > diff --git a/include/dt-bindings/clock/microchip,mpfs-clock.h b/include/dt-bindings/clock/microchip,mpfs-clock.h
> > new file mode 100644
> > index 0000000000..80ee086474
> > --- /dev/null
> > +++ b/include/dt-bindings/clock/microchip,mpfs-clock.h
nits: it looks like the naming convention of most files under
dt-bindings/clock is not using , so we should possibly use
microchip-mpfs-clock.h (or mpfs-clock.h?) as the file name
> > @@ -0,0 +1,45 @@
> > +/* SPDX-License-Identifier: GPL-2.0+ */
>
> Please make the bindings header file dual-licensed.
>
> > +/*
> > + * Copyright (C) 2020 Microchip Technology Inc.
> > + * Padmarao Begari <padmarao.begari at microchip.com>
> > + */
> > +
> > +#ifndef _DT_BINDINGS_CLK_MICROCHIP_MPFS_H_
> > +#define _DT_BINDINGS_CLK_MICROCHIP_MPFS_H_
> > +
> > +#define CLK_CPU 0
> > +#define CLK_AXI 1
> > +#define CLK_AHB 2
> > +
> > +#define CLK_ENVM 3
> > +#define CLK_MAC0 4
> > +#define CLK_MAC1 5
> > +#define CLK_MMC 6
> > +#define CLK_TIMER 7
> > +#define CLK_MMUART0 8
> > +#define CLK_MMUART1 9
> > +#define CLK_MMUART2 10
> > +#define CLK_MMUART3 11
> > +#define CLK_MMUART4 12
> > +#define CLK_SPI0 13
> > +#define CLK_SPI1 14
> > +#define CLK_I2C0 15
> > +#define CLK_I2C1 16
> > +#define CLK_CAN0 17
> > +#define CLK_CAN1 18
> > +#define CLK_USB 19
> > +#define CLK_RESERVED 20
> > +#define CLK_RTC 21
> > +#define CLK_QSPI 22
> > +#define CLK_GPIO0 23
> > +#define CLK_GPIO1 24
> > +#define CLK_GPIO2 25
> > +#define CLK_DDRC 26
> > +#define CLK_FIC0 27
> > +#define CLK_FIC1 28
> > +#define CLK_FIC2 29
> > +#define CLK_FIC3 30
> > +#define CLK_ATHENA 31
> > +#define CLK_CFM 32
> > +
> > +#endif /* _DT_BINDINGS_CLK_MICROCHIP_MPFS_H_ */
>
> Regards,
> Bin
More information about the U-Boot
mailing list