Re: [PATCH v26 3/3] clk: npcm8xx: add clock controller

From: Tomer Maimon
Date: Thu Jul 11 2024 - 14:46:30 EST

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In reply to: Benjamin Fair: "Re: [PATCH v26 3/3] clk: npcm8xx: add clock controller"
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Hi Benjamin,

Highly appreciated!

Thanks a lot

Tomer

On Thu, 11 Jul 2024 at 21:14, Benjamin Fair <benjaminfair@xxxxxxxxxx> wrote:
>
> On Tue, 2 Jul 2024 at 12:17, Tomer Maimon <tmaimon77@xxxxxxxxx> wrote:
> >
> > Add auxiliary driver to support Nuvoton Arbel BMC NPCM8XX contains an
> > integrated clock controller which generates and supplies clocks to all
> > modules within the BMC.
> >
> > The NPCM8xx clock controller is created using the auxiliary device
> > framework and set up in the npcm reset driver since the NPCM8xx clock is
> > using the same register region.
> >
> > Signed-off-by: Tomer Maimon <tmaimon77@xxxxxxxxx>
>
> I booted a kernel with this driver and verified that basic
> functionality and peripheral devices work fine.
>
> Tested-by: Benjamin Fair <benjaminfair@xxxxxxxxxx>
>
> > ---
> > drivers/clk/Kconfig | 8 +
> > drivers/clk/Makefile | 1 +
> > drivers/clk/clk-npcm8xx.c | 430 ++++++++++++++++++++++++++++++++++++++
> > 3 files changed, 439 insertions(+)
> > create mode 100644 drivers/clk/clk-npcm8xx.c
> >
> > diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
> > index 3e9099504fad..9abe32314ad5 100644
> > --- a/drivers/clk/Kconfig
> > +++ b/drivers/clk/Kconfig
> > @@ -334,6 +334,14 @@ config COMMON_CLK_LOCHNAGAR
> > This driver supports the clocking features of the Cirrus Logic
> > Lochnagar audio development board.
> >
> > +config COMMON_CLK_NPCM8XX
> > + tristate "Clock driver for the NPCM8XX SoC Family"
> > + depends on ARCH_NPCM || COMPILE_TEST
> > + help
> > + This driver supports the clocks on the Nuvoton BMC NPCM8XX SoC Family,
> > + all the clocks are initialized by the bootloader, so this driver
> > + allows only reading of current settings directly from the hardware.
> > +
> > config COMMON_CLK_LOONGSON2
> > bool "Clock driver for Loongson-2 SoC"
> > depends on LOONGARCH || COMPILE_TEST
> > diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
> > index 4abe16c8ccdf..e63487274d87 100644
> > --- a/drivers/clk/Makefile
> > +++ b/drivers/clk/Makefile
> > @@ -52,6 +52,7 @@ obj-$(CONFIG_ARCH_MILBEAUT_M10V) += clk-milbeaut.o
> > obj-$(CONFIG_ARCH_MOXART) += clk-moxart.o
> > obj-$(CONFIG_ARCH_NOMADIK) += clk-nomadik.o
> > obj-$(CONFIG_ARCH_NPCM7XX) += clk-npcm7xx.o
> > +obj-$(CONFIG_COMMON_CLK_NPCM8XX) += clk-npcm8xx.o
> > obj-$(CONFIG_ARCH_NSPIRE) += clk-nspire.o
> > obj-$(CONFIG_COMMON_CLK_PALMAS) += clk-palmas.o
> > obj-$(CONFIG_CLK_LS1028A_PLLDIG) += clk-plldig.o
> > diff --git a/drivers/clk/clk-npcm8xx.c b/drivers/clk/clk-npcm8xx.c
> > new file mode 100644
> > index 000000000000..2138c011411d
> > --- /dev/null
> > +++ b/drivers/clk/clk-npcm8xx.c
> > @@ -0,0 +1,430 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Nuvoton NPCM8xx Clock Generator
> > + * All the clocks are initialized by the bootloader, so this driver allows only
> > + * reading of current settings directly from the hardware.
> > + *
> > + * Copyright (C) 2020 Nuvoton Technologies
> > + * Author: Tomer Maimon <tomer.maimon@xxxxxxxxxxx>
> > + */
> > +
> > +#define pr_fmt(fmt) "npcm8xx_clk: " fmt
> > +
> > +#include <linux/auxiliary_bus.h>
> > +#include <linux/bitfield.h>
> > +#include <linux/clk-provider.h>
> > +#include <linux/err.h>
> > +#include <linux/io.h>
> > +#include <linux/kernel.h>
> > +#include <linux/module.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/slab.h>
> > +
> > +#include <dt-bindings/clock/nuvoton,npcm845-clk.h>
> > +#include <soc/nuvoton/clock-npcm8xx.h>
> > +
> > +/* npcm8xx clock registers*/
> > +#define NPCM8XX_CLKSEL 0x04
> > +#define NPCM8XX_CLKDIV1 0x08
> > +#define NPCM8XX_CLKDIV2 0x2C
> > +#define NPCM8XX_CLKDIV3 0x58
> > +#define NPCM8XX_CLKDIV4 0x7C
> > +#define NPCM8XX_PLLCON0 0x0C
> > +#define NPCM8XX_PLLCON1 0x10
> > +#define NPCM8XX_PLLCON2 0x54
> > +#define NPCM8XX_PLLCONG 0x60
> > +#define NPCM8XX_THRTL_CNT 0xC0
> > +
> > +#define PLLCON_LOKI BIT(31)
> > +#define PLLCON_LOKS BIT(30)
> > +#define PLLCON_FBDV GENMASK(27, 16)
> > +#define PLLCON_OTDV2 GENMASK(15, 13)
> > +#define PLLCON_PWDEN BIT(12)
> > +#define PLLCON_OTDV1 GENMASK(10, 8)
> > +#define PLLCON_INDV GENMASK(5, 0)
> > +
> > +static void __iomem *clk_base;
> > +
> > +struct npcm8xx_clk_pll {
> > + void __iomem *pllcon;
> > + unsigned int id;
> > + const char *name;
> > + unsigned long flags;
> > + struct clk_hw hw;
> > +};
> > +
> > +#define to_npcm8xx_clk_pll(_hw) container_of(_hw, struct npcm8xx_clk_pll, hw)
> > +
> > +struct npcm8xx_clk_pll_data {
> > + const char *name;
> > + struct clk_parent_data parent;
> > + unsigned int reg;
> > + unsigned long flags;
> > + struct clk_hw hw;
> > +};
> > +
> > +struct npcm8xx_clk_div_data {
> > + u32 reg;
> > + u8 shift;
> > + u8 width;
> > + const char *name;
> > + const struct clk_hw *parent_hw;
> > + unsigned long clk_divider_flags;
> > + unsigned long flags;
> > + int onecell_idx;
> > + struct clk_hw hw;
> > +};
> > +
> > +struct npcm8xx_clk_mux_data {
> > + u8 shift;
> > + u32 mask;
> > + const u32 *table;
> > + const char *name;
> > + const struct clk_parent_data *parent_data;
> > + u8 num_parents;
> > + unsigned long flags;
> > + struct clk_hw hw;
> > +};
> > +
> > +static struct clk_hw hw_pll1_div2, hw_pll2_div2, hw_gfx_div2, hw_pre_clk;
> > +static struct npcm8xx_clk_pll_data npcm8xx_pll_clks[] = {
> > + { "pll0", { .index = 0 }, NPCM8XX_PLLCON0, 0 },
> > + { "pll1", { .index = 0 }, NPCM8XX_PLLCON1, 0 },
> > + { "pll2", { .index = 0 }, NPCM8XX_PLLCON2, 0 },
> > + { "pll_gfx", { .index = 0 }, NPCM8XX_PLLCONG, 0 },
> > +};
> > +
> > +static const u32 cpuck_mux_table[] = { 0, 1, 2, 7 };
> > +static const struct clk_parent_data cpuck_mux_parents[] = {
> > + { .hw = &npcm8xx_pll_clks[0].hw },
> > + { .hw = &npcm8xx_pll_clks[1].hw },
> > + { .index = 0 },
> > + { .hw = &npcm8xx_pll_clks[2].hw }
> > +};
> > +
> > +static const u32 pixcksel_mux_table[] = { 0, 2 };
> > +static const struct clk_parent_data pixcksel_mux_parents[] = {
> > + { .hw = &npcm8xx_pll_clks[3].hw },
> > + { .index = 0 }
> > +};
> > +
> > +static const u32 default_mux_table[] = { 0, 1, 2, 3 };
> > +static const struct clk_parent_data default_mux_parents[] = {
> > + { .hw = &npcm8xx_pll_clks[0].hw },
> > + { .hw = &npcm8xx_pll_clks[1].hw },
> > + { .index = 0 },
> > + { .hw = &hw_pll2_div2 }
> > +};
> > +
> > +static const u32 sucksel_mux_table[] = { 2, 3 };
> > +static const struct clk_parent_data sucksel_mux_parents[] = {
> > + { .index = 0 },
> > + { .hw = &hw_pll2_div2 }
> > +};
> > +
> > +static const u32 mccksel_mux_table[] = { 0, 2 };
> > +static const struct clk_parent_data mccksel_mux_parents[] = {
> > + { .hw = &hw_pll1_div2 },
> > + { .index = 0 }
> > +};
> > +
> > +static const u32 clkoutsel_mux_table[] = { 0, 1, 2, 3, 4 };
> > +static const struct clk_parent_data clkoutsel_mux_parents[] = {
> > + { .hw = &npcm8xx_pll_clks[0].hw },
> > + { .hw = &npcm8xx_pll_clks[1].hw },
> > + { .index = 0 },
> > + { .hw = &hw_gfx_div2 },
> > + { .hw = &hw_pll2_div2 }
> > +};
> > +
> > +static const u32 gfxmsel_mux_table[] = { 2, 3 };
> > +static const struct clk_parent_data gfxmsel_mux_parents[] = {
> > + { .index = 0 },
> > + { .hw = &npcm8xx_pll_clks[2].hw }
> > +};
> > +
> > +static const u32 dvcssel_mux_table[] = { 2, 3 };
> > +static const struct clk_parent_data dvcssel_mux_parents[] = {
> > + { .index = 0 },
> > + { .hw = &npcm8xx_pll_clks[2].hw }
> > +};
> > +
> > +static const u32 default3_mux_table[] = { 0, 1, 2 };
> > +static const struct clk_parent_data default3_mux_parents[] = {
> > + { .hw = &npcm8xx_pll_clks[0].hw },
> > + { .hw = &npcm8xx_pll_clks[1].hw },
> > + { .index = 0 }
> > +};
> > +
> > +static struct npcm8xx_clk_mux_data npcm8xx_muxes[] = {
> > + { 0, 3, cpuck_mux_table, "cpu_mux", cpuck_mux_parents,
> > + ARRAY_SIZE(cpuck_mux_parents), CLK_IS_CRITICAL },
> > + { 4, 2, pixcksel_mux_table, "gfx_pixel_mux", pixcksel_mux_parents,
> > + ARRAY_SIZE(pixcksel_mux_parents), 0 },
> > + { 6, 2, default_mux_table, "sd_mux", default_mux_parents,
> > + ARRAY_SIZE(default_mux_parents), 0 },
> > + { 8, 2, default_mux_table, "uart_mux", default_mux_parents,
> > + ARRAY_SIZE(default_mux_parents), 0 },
> > + { 10, 2, sucksel_mux_table, "serial_usb_mux", sucksel_mux_parents,
> > + ARRAY_SIZE(sucksel_mux_parents), 0 },
> > + { 12, 2, mccksel_mux_table, "mc_mux", mccksel_mux_parents,
> > + ARRAY_SIZE(mccksel_mux_parents), 0 },
> > + { 14, 2, default_mux_table, "adc_mux", default_mux_parents,
> > + ARRAY_SIZE(default_mux_parents), 0 },
> > + { 16, 2, default_mux_table, "gfx_mux", default_mux_parents,
> > + ARRAY_SIZE(default_mux_parents), 0 },
> > + { 18, 3, clkoutsel_mux_table, "clkout_mux", clkoutsel_mux_parents,
> > + ARRAY_SIZE(clkoutsel_mux_parents), 0 },
> > + { 21, 2, gfxmsel_mux_table, "gfxm_mux", gfxmsel_mux_parents,
> > + ARRAY_SIZE(gfxmsel_mux_parents), 0 },
> > + { 23, 2, dvcssel_mux_table, "dvc_mux", dvcssel_mux_parents,
> > + ARRAY_SIZE(dvcssel_mux_parents), 0 },
> > + { 25, 2, default3_mux_table, "rg_mux", default3_mux_parents,
> > + ARRAY_SIZE(default3_mux_parents), 0 },
> > + { 27, 2, default3_mux_table, "rcp_mux", default3_mux_parents,
> > + ARRAY_SIZE(default3_mux_parents), 0 },
> > +};
> > +
> > +/* configurable pre dividers: */
> > +static struct npcm8xx_clk_div_data npcm8xx_pre_divs[] = {
> > + { NPCM8XX_CLKDIV1, 21, 5, "pre_adc", &npcm8xx_muxes[6].hw, CLK_DIVIDER_READ_ONLY, 0, -1 },
> > + { NPCM8XX_CLKDIV1, 26, 2, "ahb", &hw_pre_clk, CLK_DIVIDER_READ_ONLY, CLK_IS_CRITICAL, NPCM8XX_CLK_AHB },
> > +};
> > +
> > +/* configurable dividers: */
> > +static struct npcm8xx_clk_div_data npcm8xx_divs[] = {
> > + { NPCM8XX_CLKDIV1, 28, 3, "adc", &npcm8xx_pre_divs[0].hw, CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, NPCM8XX_CLK_ADC },
> > + { NPCM8XX_CLKDIV1, 16, 5, "uart", &npcm8xx_muxes[3].hw, 0, 0, NPCM8XX_CLK_UART },
> > + { NPCM8XX_CLKDIV1, 11, 5, "mmc", &npcm8xx_muxes[2].hw, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_MMC },
> > + { NPCM8XX_CLKDIV1, 6, 5, "spi3", &npcm8xx_pre_divs[1].hw, 0, 0, NPCM8XX_CLK_SPI3 },
> > + { NPCM8XX_CLKDIV1, 2, 4, "pci", &npcm8xx_muxes[7].hw, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_PCI },
> > +
> > + { NPCM8XX_CLKDIV2, 30, 2, "apb4", &npcm8xx_pre_divs[1].hw, CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, NPCM8XX_CLK_APB4 },
> > + { NPCM8XX_CLKDIV2, 28, 2, "apb3", &npcm8xx_pre_divs[1].hw, CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, NPCM8XX_CLK_APB3 },
> > + { NPCM8XX_CLKDIV2, 26, 2, "apb2", &npcm8xx_pre_divs[1].hw, CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, NPCM8XX_CLK_APB2 },
> > + { NPCM8XX_CLKDIV2, 24, 2, "apb1", &npcm8xx_pre_divs[1].hw, CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, NPCM8XX_CLK_APB1 },
> > + { NPCM8XX_CLKDIV2, 22, 2, "apb5", &npcm8xx_pre_divs[1].hw, CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, NPCM8XX_CLK_APB5 },
> > + { NPCM8XX_CLKDIV2, 16, 5, "clkout", &npcm8xx_muxes[8].hw, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_CLKOUT },
> > + { NPCM8XX_CLKDIV2, 13, 3, "gfx", &npcm8xx_muxes[7].hw, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_GFX },
> > + { NPCM8XX_CLKDIV2, 8, 5, "usb_bridge", &npcm8xx_muxes[4].hw, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_SU },
> > + { NPCM8XX_CLKDIV2, 4, 4, "usb_host", &npcm8xx_muxes[4].hw, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_SU48 },
> > + { NPCM8XX_CLKDIV2, 0, 4, "sdhc", &npcm8xx_muxes[2].hw, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_SDHC },
> > +
> > + { NPCM8XX_CLKDIV3, 16, 8, "spi1", &npcm8xx_pre_divs[1].hw, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_SPI1 },
> > + { NPCM8XX_CLKDIV3, 11, 5, "uart2", &npcm8xx_muxes[3].hw, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_UART2 },
> > + { NPCM8XX_CLKDIV3, 6, 5, "spi0", &npcm8xx_pre_divs[1].hw, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_SPI0 },
> > + { NPCM8XX_CLKDIV3, 1, 5, "spix", &npcm8xx_pre_divs[1].hw, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_SPIX },
> > +
> > + { NPCM8XX_CLKDIV4, 28, 4, "rg", &npcm8xx_muxes[11].hw, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_RG },
> > + { NPCM8XX_CLKDIV4, 12, 4, "rcp", &npcm8xx_muxes[12].hw, CLK_DIVIDER_READ_ONLY, 0, NPCM8XX_CLK_RCP },
> > +
> > + { NPCM8XX_THRTL_CNT, 0, 2, "th", &npcm8xx_muxes[0].hw, CLK_DIVIDER_READ_ONLY | CLK_DIVIDER_POWER_OF_TWO, 0, NPCM8XX_CLK_TH },
> > +};
> > +
> > +static unsigned long npcm8xx_clk_pll_recalc_rate(struct clk_hw *hw,
> > + unsigned long parent_rate)
> > +{
> > + struct npcm8xx_clk_pll *pll = to_npcm8xx_clk_pll(hw);
> > + unsigned long fbdv, indv, otdv1, otdv2;
> > + unsigned int val;
> > + u64 ret;
> > +
> > + if (parent_rate == 0) {
> > + pr_debug("%s: parent rate is zero\n", __func__);
> > + return 0;
> > + }
> > +
> > + val = readl_relaxed(pll->pllcon);
> > +
> > + indv = FIELD_GET(PLLCON_INDV, val);
> > + fbdv = FIELD_GET(PLLCON_FBDV, val);
> > + otdv1 = FIELD_GET(PLLCON_OTDV1, val);
> > + otdv2 = FIELD_GET(PLLCON_OTDV2, val);
> > +
> > + ret = (u64)parent_rate * fbdv;
> > + do_div(ret, indv * otdv1 * otdv2);
> > +
> > + return ret;
> > +}
> > +
> > +static const struct clk_ops npcm8xx_clk_pll_ops = {
> > + .recalc_rate = npcm8xx_clk_pll_recalc_rate,
> > +};
> > +
> > +static struct clk_hw *
> > +npcm8xx_clk_register_pll(struct device *dev, void __iomem *pllcon,
> > + const char *name, const struct clk_parent_data *parent,
> > + unsigned long flags)
> > +{
> > + struct npcm8xx_clk_pll *pll;
> > + struct clk_init_data init = {};
> > + int ret;
> > +
> > + pll = devm_kzalloc(dev, sizeof(*pll), GFP_KERNEL);
> > + if (!pll)
> > + return ERR_PTR(-ENOMEM);
> > +
> > + init.name = name;
> > + init.ops = &npcm8xx_clk_pll_ops;
> > + init.parent_data = parent;
> > + init.num_parents = 1;
> > + init.flags = flags;
> > +
> > + pll->pllcon = pllcon;
> > + pll->hw.init = &init;
> > +
> > + ret = devm_clk_hw_register(dev, &pll->hw);
> > + if (ret)
> > + return ERR_PTR(ret);
> > +
> > + return &pll->hw;
> > +}
> > +
> > +static DEFINE_SPINLOCK(npcm8xx_clk_lock);
> > +
> > +static int npcm8xx_clk_probe(struct auxiliary_device *adev,
> > + const struct auxiliary_device_id *id)
> > +{
> > + struct npcm_clock_adev *rdev = to_npcm_clock_adev(adev);
> > + struct clk_hw_onecell_data *npcm8xx_clk_data;
> > + struct device *dev = &adev->dev;
> > + struct clk_hw *hw;
> > + unsigned int i;
> > +
> > + npcm8xx_clk_data = devm_kzalloc(dev, struct_size(npcm8xx_clk_data, hws,
> > + NPCM8XX_NUM_CLOCKS),
> > + GFP_KERNEL);
> > + if (!npcm8xx_clk_data)
> > + return -ENOMEM;
> > +
> > + clk_base = rdev->base;
> > +
> > + npcm8xx_clk_data->num = NPCM8XX_NUM_CLOCKS;
> > +
> > + for (i = 0; i < NPCM8XX_NUM_CLOCKS; i++)
> > + npcm8xx_clk_data->hws[i] = ERR_PTR(-EPROBE_DEFER);
> > +
> > + /* Register plls */
> > + for (i = 0; i < ARRAY_SIZE(npcm8xx_pll_clks); i++) {
> > + struct npcm8xx_clk_pll_data *pll_clk = &npcm8xx_pll_clks[i];
> > +
> > + hw = npcm8xx_clk_register_pll(dev, clk_base + pll_clk->reg,
> > + pll_clk->name, &pll_clk->parent,
> > + pll_clk->flags);
> > + if (IS_ERR(hw))
> > + return dev_err_probe(dev, PTR_ERR(hw), "Can't register pll\n");
> > + pll_clk->hw = *hw;
> > + }
> > +
> > + /* Register fixed dividers */
> > + hw = devm_clk_hw_register_fixed_factor(dev, "pll1_div2", "pll1", 0, 1, 2);
> > + if (IS_ERR(hw))
> > + return dev_err_probe(dev, PTR_ERR(hw), "Can't register fixed div\n");
> > + hw_pll1_div2 = *hw;
> > +
> > + hw = devm_clk_hw_register_fixed_factor(dev, "pll2_div2", "pll2", 0, 1, 2);
> > + if (IS_ERR(hw))
> > + return dev_err_probe(dev, PTR_ERR(hw), "Can't register pll2 div2\n");
> > + hw_pll2_div2 = *hw;
> > +
> > + hw = devm_clk_hw_register_fixed_factor(dev, "pll_gfx_div2", "pll_gfx", 0, 1, 2);
> > + if (IS_ERR(hw))
> > + return dev_err_probe(dev, PTR_ERR(hw), "Can't register gfx div2\n");
> > + hw_gfx_div2 = *hw;
> > +
> > + /* Register muxes */
> > + for (i = 0; i < ARRAY_SIZE(npcm8xx_muxes); i++) {
> > + struct npcm8xx_clk_mux_data *mux_data = &npcm8xx_muxes[i];
> > +
> > + hw = devm_clk_hw_register_mux_parent_data_table(dev,
> > + mux_data->name,
> > + mux_data->parent_data,
> > + mux_data->num_parents,
> > + mux_data->flags,
> > + clk_base + NPCM8XX_CLKSEL,
> > + mux_data->shift,
> > + mux_data->mask,
> > + 0,
> > + mux_data->table,
> > + &npcm8xx_clk_lock);
> > + if (IS_ERR(hw))
> > + return dev_err_probe(dev, PTR_ERR(hw), "Can't register mux\n");
> > + mux_data->hw = *hw;
> > + }
> > +
> > + hw = devm_clk_hw_register_fixed_factor(dev, "pre_clk", "cpu_mux", 0, 1, 2);
> > + if (IS_ERR(hw))
> > + return dev_err_probe(dev, PTR_ERR(hw), "Can't register pre clk div2\n");
> > + hw_pre_clk = *hw;
> > +
> > + hw = devm_clk_hw_register_fixed_factor(dev, "axi", "th", 0, 1, 2);
> > + if (IS_ERR(hw))
> > + return dev_err_probe(dev, PTR_ERR(hw), "Can't register axi div2\n");
> > + npcm8xx_clk_data->hws[NPCM8XX_CLK_AXI] = hw;
> > +
> > + hw = devm_clk_hw_register_fixed_factor(dev, "atb", "axi", 0, 1, 2);
> > + if (IS_ERR(hw))
> > + return dev_err_probe(dev, PTR_ERR(hw), "Can't register atb div2\n");
> > + npcm8xx_clk_data->hws[NPCM8XX_CLK_ATB] = hw;
> > +
> > + /* Register pre dividers */
> > + for (i = 0; i < ARRAY_SIZE(npcm8xx_pre_divs); i++) {
> > + struct npcm8xx_clk_div_data *div_data = &npcm8xx_pre_divs[i];
> > +
> > + hw = devm_clk_hw_register_divider_parent_hw(dev, div_data->name,
> > + div_data->parent_hw,
> > + div_data->flags,
> > + clk_base + div_data->reg,
> > + div_data->shift,
> > + div_data->width,
> > + div_data->clk_divider_flags,
> > + &npcm8xx_clk_lock);
> > + if (IS_ERR(hw))
> > + return dev_err_probe(dev, PTR_ERR(hw), "Can't register pre div\n");
> > + div_data->hw = *hw;
> > +
> > + if (div_data->onecell_idx >= 0)
> > + npcm8xx_clk_data->hws[div_data->onecell_idx] = hw;
> > + }
> > +
> > + /* Register dividers */
> > + for (i = 0; i < ARRAY_SIZE(npcm8xx_divs); i++) {
> > + struct npcm8xx_clk_div_data *div_data = &npcm8xx_divs[i];
> > +
> > + hw = devm_clk_hw_register_divider_parent_hw(dev, div_data->name,
> > + div_data->parent_hw,
> > + div_data->flags,
> > + clk_base + div_data->reg,
> > + div_data->shift,
> > + div_data->width,
> > + div_data->clk_divider_flags,
> > + &npcm8xx_clk_lock);
> > + if (IS_ERR(hw))
> > + return dev_err_probe(dev, PTR_ERR(hw), "Can't register div\n");
> > +
> > + if (div_data->onecell_idx >= 0)
> > + npcm8xx_clk_data->hws[div_data->onecell_idx] = hw;
> > + }
> > +
> > + return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
> > + npcm8xx_clk_data);
> > +}
> > +
> > +static const struct auxiliary_device_id npcm8xx_clock_ids[] = {
> > + {
> > + .name = "reset_npcm.clk-npcm8xx",
> > + },
> > + { }
> > +};
> > +MODULE_DEVICE_TABLE(auxiliary, npcm8xx_clock_ids);
> > +
> > +static struct auxiliary_driver npcm8xx_clock_driver = {
> > + .probe = npcm8xx_clk_probe,
> > + .id_table = npcm8xx_clock_ids,
> > +};
> > +module_auxiliary_driver(npcm8xx_clock_driver);
> > +
> > +MODULE_DESCRIPTION("Clock driver for Nuvoton NPCM8XX BMC SoC");
> > +MODULE_AUTHOR("Tomer Maimon <tomer.maimon@xxxxxxxxxxx>");
> > +MODULE_LICENSE("GPL v2");
> > +
> > --
> > 2.34.1
> >

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