Add clock driver for Sunplus SP7021 SoC. Signed-off-by: Qin Jian <qinjian@xxxxxxxxxxx> --- Fix the comments from Stephen Boyd. --- MAINTAINERS | 1 + drivers/clk/Kconfig | 10 + drivers/clk/Makefile | 1 + drivers/clk/clk-sp7021.c | 725 +++++++++++++++++++++++++++++++++++++++ 4 files changed, 737 insertions(+) create mode 100644 drivers/clk/clk-sp7021.c diff --git a/MAINTAINERS b/MAINTAINERS index 91b92b4fb..b90bb93a3 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2813,6 +2813,7 @@ W: https://sunplus-tibbo.atlassian.net/wiki/spaces/doc/overview F: Documentation/devicetree/bindings/arm/sunplus,sp7021.yaml F: Documentation/devicetree/bindings/clock/sunplus,sp7021-clkc.yaml F: Documentation/devicetree/bindings/reset/sunplus,reset.yaml +F: drivers/clk/clk-sp7021.c F: drivers/reset/reset-sunplus.c F: include/dt-bindings/clock/sunplus,sp7021-clkc.h F: include/dt-bindings/reset/sunplus,sp7021-reset.h diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index 5d596e778..5b28f9c04 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -414,6 +414,16 @@ config COMMON_CLK_K210 help Support for the Canaan Kendryte K210 RISC-V SoC clocks. +config COMMON_CLK_SP7021 + tristate "Clock driver for Sunplus SP7021 SoC" + depends on SOC_SP7021 || COMPILE_TEST + default SOC_SP7021 + help + This driver supports the Sunplus SP7021 SoC clocks. + It implements SP7021 PLLs/gate. + Not all features of the PLL are currently supported + by the driver. + source "drivers/clk/actions/Kconfig" source "drivers/clk/analogbits/Kconfig" source "drivers/clk/baikal-t1/Kconfig" diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 2bd5ffd59..b9af64503 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -64,6 +64,7 @@ obj-$(CONFIG_COMMON_CLK_SI5351) += clk-si5351.o obj-$(CONFIG_COMMON_CLK_SI514) += clk-si514.o obj-$(CONFIG_COMMON_CLK_SI544) += clk-si544.o obj-$(CONFIG_COMMON_CLK_SI570) += clk-si570.o +obj-$(CONFIG_COMMON_CLK_SP7021) += clk-sp7021.o obj-$(CONFIG_COMMON_CLK_STM32F) += clk-stm32f4.o obj-$(CONFIG_COMMON_CLK_STM32H7) += clk-stm32h7.o obj-$(CONFIG_COMMON_CLK_STM32MP157) += clk-stm32mp1.o diff --git a/drivers/clk/clk-sp7021.c b/drivers/clk/clk-sp7021.c new file mode 100644 index 000000000..0caef1bc7 --- /dev/null +++ b/drivers/clk/clk-sp7021.c @@ -0,0 +1,725 @@ +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +/* + * Copyright (C) Sunplus Technology Co., Ltd. + * All rights reserved. + */ +#include <linux/module.h> +#include <linux/clk-provider.h> +#include <linux/of.h> +#include <linux/bitfield.h> +#include <linux/slab.h> +#include <linux/io.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <dt-bindings/clock/sunplus,sp7021-clkc.h> + +/* speical div_width values for PLLTV/PLLA */ +#define DIV_TV 33 +#define DIV_A 34 + +/* PLLTV parameters */ +enum { + SEL_FRA, + SDM_MOD, + PH_SEL, + NFRA, + DIVR, + DIVN, + DIVM, + P_MAX +}; + +#define MASK_SEL_FRA GENMASK(1, 1) +#define MASK_SDM_MOD GENMASK(2, 2) +#define MASK_PH_SEL GENMASK(4, 4) +#define MASK_NFRA GENMASK(12, 6) +#define MASK_DIVR GENMASK(8, 7) +#define MASK_DIVN GENMASK(7, 0) +#define MASK_DIVM GENMASK(14, 8) + +/* HIWORD_MASK FIELD_PREP */ +#define HWM_FIELD_PREP(mask, value) \ +({ \ + u32 _m = mask; \ + (_m << 16) | FIELD_PREP(_m, value); \ +}) + +struct sp_pll { + struct clk_hw hw; + void __iomem *reg; + spinlock_t lock; /* lock for reg */ + int div_shift; + int div_width; + int pd_bit; /* power down bit idx */ + int bp_bit; /* bypass bit idx */ + unsigned long brate; /* base rate, TODO: replace brate with muldiv */ + u32 p[P_MAX]; /* for hold PLLTV/PLLA parameters */ +}; + +#define to_sp_pll(_hw) container_of(_hw, struct sp_pll, hw) + +struct sp_clk_gate_info { + u16 reg; /* reg_index_shift */ + u16 ext_parent; /* parent is extclk */ +}; + +static const struct sp_clk_gate_info sp_clk_gates[] = { + { 0x02 }, + { 0x05 }, + { 0x06 }, + { 0x07 }, + { 0x09 }, + { 0x0b, 1 }, + { 0x0f, 1 }, + { 0x14 }, + { 0x15 }, + { 0x16 }, + { 0x17 }, + { 0x18, 1 }, + { 0x19, 1 }, + { 0x1a, 1 }, + { 0x1b, 1 }, + { 0x1c, 1 }, + { 0x1d, 1 }, + { 0x1e }, + { 0x1f, 1 }, + { 0x20 }, + { 0x21 }, + { 0x22 }, + { 0x23 }, + { 0x24 }, + { 0x25 }, + { 0x26 }, + { 0x2a }, + { 0x2b }, + { 0x2d }, + { 0x2e }, + { 0x30 }, + { 0x31 }, + { 0x32 }, + { 0x33 }, + { 0x3d }, + { 0x3e }, + { 0x3f }, + { 0x42 }, + { 0x44 }, + { 0x4b }, + { 0x4c }, + { 0x4d }, + { 0x4e }, + { 0x4f }, + { 0x50 }, + { 0x55 }, + { 0x60 }, + { 0x61 }, + { 0x6a }, + { 0x73 }, + { 0x86 }, + { 0x8a }, + { 0x8b }, + { 0x8d }, + { 0x8e }, + { 0x8f }, + { 0x90 }, + { 0x92 }, + { 0x93 }, + { 0x95 }, + { 0x96 }, + { 0x97 }, + { 0x98 }, + { 0x99 }, +}; + +#define _M 1000000UL +#define F_27M (27 * _M) + +/*********************************** PLL_TV **********************************/ + +/* TODO: set proper FVCO range */ +#define FVCO_MIN (100 * _M) +#define FVCO_MAX (200 * _M) + +#define F_MIN (FVCO_MIN / 8) +#define F_MAX (FVCO_MAX) + +static long plltv_integer_div(struct sp_pll *clk, unsigned long freq) +{ + /* valid m values: 27M must be divisible by m */ + static const u32 m_table[] = { + 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 25, 27, 30, 32 + }; + u32 m, n, r; + unsigned long fvco, nf; + long ret; + + freq = clamp(freq, F_MIN, F_MAX); + + /* DIVR 0~3 */ + for (r = 0; r <= 3; r++) { + fvco = freq << r; + if (fvco <= FVCO_MAX) + break; + } + + /* DIVM */ + for (m = 0; m < ARRAY_SIZE(m_table); m++) { + nf = fvco * m_table[m]; + n = nf / F_27M; + if ((n * F_27M) == nf) + break; + } + m = m_table[m]; + + if (!m) { + ret = -EINVAL; + goto err_not_found; + } + + /* save parameters */ + clk->p[SEL_FRA] = 0; + clk->p[DIVR] = r; + clk->p[DIVN] = n; + clk->p[DIVM] = m; + + return freq; + +err_not_found: + pr_err("%s: %s freq:%lu not found a valid setting\n", + __func__, clk_hw_get_name(&clk->hw), freq); + + return ret; +} + +/* parameters for PLLTV fractional divider */ +static const u32 pt[][5] = { + /* conventional fractional */ + { + 1, /* factor */ + 5, /* 5 * p0 (nint) */ + 1, /* 1 * p0 */ + F_27M, /* F_27M / p0 */ + 1, /* p0 / p2 */ + }, + /* phase rotation */ + { + 10, /* factor */ + 54, /* 5.4 * p0 (nint) */ + 2, /* 0.2 * p0 */ + F_27M / 10, /* F_27M / p0 */ + 5, /* p0 / p2 */ + }, +}; + +static const u32 sdm_mod_vals[] = { 91, 55 }; + +static long plltv_fractional_div(struct sp_pll *clk, unsigned long freq) +{ + u32 m, r; + u32 nint, nfra; + u32 df_quotient_min = 210000000; + u32 df_remainder_min = 0; + unsigned long fvco, nf, f, fout = 0; + int sdm, ph; + + freq = clamp(freq, F_MIN, F_MAX); + + /* DIVR 0~3 */ + for (r = 0; r <= 3; r++) { + fvco = freq << r; + if (fvco <= FVCO_MAX) + break; + } + f = F_27M >> r; + + /* PH_SEL */ + for (ph = ARRAY_SIZE(pt) - 1; ph >= 0; ph--) { + const u32 *pp = pt[ph]; + + /* SDM_MOD */ + for (sdm = 0; sdm < ARRAY_SIZE(sdm_mod_vals); sdm++) { + u32 mod = sdm_mod_vals[sdm]; + + /* DIVM 1~32 */ + for (m = 1; m <= 32; m++) { + u32 df; /* diff freq */ + u32 df_quotient, df_remainder; + + nf = fvco * m; + nint = nf / pp[3]; + + if (nint < pp[1]) + continue; + if (nint > pp[1]) + break; + + nfra = (((nf % pp[3]) * mod * pp[4]) + (F_27M / 2)) / F_27M; + if (nfra) { + u32 df0 = f * (nint + pp[2]) / pp[0]; + u32 df1 = f * (mod - nfra) / mod / pp[4]; + + df = df0 - df1; + } else { + df = f * (nint) / pp[0]; + } + + df_quotient = df / m; + df_remainder = ((df % m) * 1000) / m; + + if (freq > df_quotient) { + df_quotient = freq - df_quotient - 1; + df_remainder = 1000 - df_remainder; + } else { + df_quotient = df_quotient - freq; + } + + if (df_quotient_min > df_quotient || + (df_quotient_min == df_quotient && + df_remainder_min > df_remainder)) { + /* found a closer freq, save parameters */ + clk->p[SEL_FRA] = 1; + clk->p[SDM_MOD] = sdm; + clk->p[PH_SEL] = ph; + clk->p[NFRA] = nfra; + clk->p[DIVR] = r; + clk->p[DIVM] = m; + + fout = df / m; + df_quotient_min = df_quotient; + df_remainder_min = df_remainder; + } + } + } + } + + if (!fout) { + pr_err("%s: %s freq:%lu not found a valid setting\n", + __func__, clk_hw_get_name(&clk->hw), freq); + return -EINVAL; + } + + return fout; +} + +static long plltv_div(struct sp_pll *clk, unsigned long freq) +{ + if (freq % 100) + return plltv_fractional_div(clk, freq); + + return plltv_integer_div(clk, freq); +} + +static int plltv_set_rate(struct sp_pll *clk) +{ + unsigned long flags; + u32 r0, r1, r2; + + r0 = BIT(clk->bp_bit + 16); + r0 |= HWM_FIELD_PREP(MASK_SEL_FRA, clk->p[SEL_FRA]); + r0 |= HWM_FIELD_PREP(MASK_SDM_MOD, clk->p[SDM_MOD]); + r0 |= HWM_FIELD_PREP(MASK_PH_SEL, clk->p[PH_SEL]); + r0 |= HWM_FIELD_PREP(MASK_NFRA, clk->p[NFRA]); + + r1 = HWM_FIELD_PREP(MASK_DIVR, clk->p[DIVR]); + + r2 = HWM_FIELD_PREP(MASK_DIVN, clk->p[DIVN] - 1); + r2 |= HWM_FIELD_PREP(MASK_DIVM, clk->p[DIVM] - 1); + + spin_lock_irqsave(&clk->lock, flags); + writel(r0, clk->reg); + writel(r1, clk->reg + 4); + writel(r2, clk->reg + 8); + spin_unlock_irqrestore(&clk->lock, flags); + + return 0; +} + +/*********************************** PLL_A ***********************************/ + +/* from Q628_PLLs_REG_setting.xlsx */ +static const struct { + u32 rate; + u32 regs[5]; +} pa[] = { + { + .rate = 135475200, + .regs = { + 0x4801, + 0x02df, + 0x248f, + 0x0211, + 0x33e9 + } + }, + { + .rate = 147456000, + .regs = { + 0x4801, + 0x1adf, + 0x2490, + 0x0349, + 0x33e9 + } + }, + { + .rate = 196608000, + .regs = { + 0x4801, + 0x42ef, + 0x2495, + 0x01c6, + 0x33e9 + } + }, +}; + +static int plla_set_rate(struct sp_pll *clk) +{ + const u32 *pp = pa[clk->p[0]].regs; + unsigned long flags; + int i; + + spin_lock_irqsave(&clk->lock, flags); + for (i = 0; i < ARRAY_SIZE(pa->regs); i++) + writel(0xffff0000 | pp[i], clk->reg + (i * 4)); + spin_unlock_irqrestore(&clk->lock, flags); + + return 0; +} + +static long plla_round_rate(struct sp_pll *clk, unsigned long rate) +{ + int i = ARRAY_SIZE(pa); + + while (--i) { + if (rate >= pa[i].rate) + break; + } + clk->p[0] = i; + + return pa[i].rate; +} + +/********************************** SP_PLL ***********************************/ + +static long sp_pll_calc_div(struct sp_pll *clk, unsigned long rate) +{ + u32 fbdiv; + u32 max = 1 << clk->div_width; + + fbdiv = DIV_ROUND_CLOSEST(rate, clk->brate); + if (fbdiv > max) + fbdiv = max; + + return fbdiv; +} + +static long sp_pll_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *prate) +{ + struct sp_pll *clk = to_sp_pll(hw); + long ret; + + if (rate == *prate) { + ret = *prate; /* bypass */ + } else if (clk->div_width == DIV_A) { + ret = plla_round_rate(clk, rate); + } else if (clk->div_width == DIV_TV) { + ret = plltv_div(clk, rate); + if (ret < 0) + ret = *prate; + } else { + ret = sp_pll_calc_div(clk, rate) * clk->brate; + } + + return ret; +} + +static unsigned long sp_pll_recalc_rate(struct clk_hw *hw, + unsigned long prate) +{ + struct sp_pll *clk = to_sp_pll(hw); + u32 reg = readl(clk->reg); + unsigned long ret; + + if (reg & BIT(clk->bp_bit)) { + ret = prate; /* bypass */ + } else if (clk->div_width == DIV_A) { + ret = pa[clk->p[0]].rate; + } else if (clk->div_width == DIV_TV) { + u32 m, r, reg2; + + r = FIELD_GET(MASK_DIVR, readl(clk->reg + 4)); + reg2 = readl(clk->reg + 8); + m = FIELD_GET(MASK_DIVM, reg2) + 1; + + if (reg & MASK_SEL_FRA) { + /* fractional divider */ + u32 sdm = FIELD_GET(MASK_SDM_MOD, reg); + u32 ph = FIELD_GET(MASK_PH_SEL, reg); + u32 nfra = FIELD_GET(MASK_NFRA, reg); + const u32 *pp = pt[ph]; + unsigned long r0, r1; + + ret = prate >> r; + r0 = ret * (pp[1] + pp[2]) / pp[0]; + r1 = ret * (sdm_mod_vals[sdm] - nfra) / sdm_mod_vals[sdm] / pp[4]; + ret = (r0 - r1) / m; + } else { + /* integer divider */ + u32 n = FIELD_GET(MASK_DIVN, reg2) + 1; + + ret = (prate / m * n) >> r; + } + } else { + u32 fbdiv = ((reg >> clk->div_shift) & ((1 << clk->div_width) - 1)) + 1; + + ret = clk->brate * fbdiv; + } + + return ret; +} + +static int sp_pll_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long prate) +{ + struct sp_pll *clk = to_sp_pll(hw); + unsigned long flags; + u32 reg; + + reg = BIT(clk->bp_bit + 16); /* HIWORD_MASK */ + + if (rate == prate) { + reg |= BIT(clk->bp_bit); /* bypass */ + } else if (clk->div_width == DIV_A) { + return plla_set_rate(clk); + } else if (clk->div_width == DIV_TV) { + return plltv_set_rate(clk); + } else if (clk->div_width) { + u32 fbdiv = sp_pll_calc_div(clk, rate); + u32 mask = GENMASK(clk->div_shift + clk->div_width - 1, clk->div_shift); + + reg |= mask << 16; + reg |= ((fbdiv - 1) << clk->div_shift) & mask; + } + + spin_lock_irqsave(&clk->lock, flags); + writel(reg, clk->reg); + spin_unlock_irqrestore(&clk->lock, flags); + + return 0; +} + +static int sp_pll_enable(struct clk_hw *hw) +{ + struct sp_pll *clk = to_sp_pll(hw); + + writel(BIT(clk->pd_bit + 16) | BIT(clk->pd_bit), clk->reg); + + return 0; +} + +static void sp_pll_disable(struct clk_hw *hw) +{ + struct sp_pll *clk = to_sp_pll(hw); + + writel(BIT(clk->pd_bit + 16), clk->reg); +} + +static int sp_pll_is_enabled(struct clk_hw *hw) +{ + struct sp_pll *clk = to_sp_pll(hw); + + return readl(clk->reg) & BIT(clk->pd_bit); +} + +static const struct clk_ops sp_pll_ops = { + .enable = sp_pll_enable, + .disable = sp_pll_disable, + .is_enabled = sp_pll_is_enabled, + .round_rate = sp_pll_round_rate, + .recalc_rate = sp_pll_recalc_rate, + .set_rate = sp_pll_set_rate +}; + +static const struct clk_ops sp_pll_sub_ops = { + .enable = sp_pll_enable, + .disable = sp_pll_disable, + .is_enabled = sp_pll_is_enabled, + .recalc_rate = sp_pll_recalc_rate, +}; + +static struct clk_hw *sp_pll_register(struct device *dev, const char *name, + const struct clk_parent_data *parent_data, + void __iomem *reg, int pd_bit, int bp_bit, + unsigned long brate, int shift, int width, + unsigned long flags) +{ + struct sp_pll *pll; + struct clk_hw *hw; + struct clk_init_data initd = { + .name = name, + .parent_data = parent_data, + .ops = (bp_bit >= 0) ? &sp_pll_ops : &sp_pll_sub_ops, + .num_parents = 1, + .flags = flags, + }; + int ret; + + pll = devm_kzalloc(dev, sizeof(*pll), GFP_KERNEL); + if (!pll) + return ERR_PTR(-ENOMEM); + + pll->hw.init = &initd; + pll->reg = reg; + pll->pd_bit = pd_bit; + pll->bp_bit = bp_bit; + pll->brate = brate; + pll->div_shift = shift; + pll->div_width = width; + spin_lock_init(&pll->lock); + + hw = &pll->hw; + ret = devm_clk_hw_register(dev, hw); + if (ret) + return ERR_PTR(ret); + + return hw; +} + +#define PLLA_CTL (pll_base + 0x1c) +#define PLLE_CTL (pll_base + 0x30) +#define PLLF_CTL (pll_base + 0x34) +#define PLLTV_CTL (pll_base + 0x38) + +static int sp7021_clk_probe(struct platform_device *pdev) +{ + static const u32 sp_clken[] = { + 0x67ef, 0x03ff, 0xff03, 0xfff0, 0x0004, /* G0.1~5 */ + 0x0000, 0x8000, 0xffff, 0x0040, 0x0000, /* G0.6~10 */ + }; + static struct clk_parent_data pd_ext, pd_sys, pd_e; + struct device *dev = &pdev->dev; + void __iomem *clk_base, *pll_base, *sys_base; + struct clk_hw_onecell_data *clk_data; + struct clk_hw **hws; + int i, ret; + + clk_base = devm_platform_ioremap_resource(pdev, 0); + if (!clk_base) + return -ENXIO; + pll_base = devm_platform_ioremap_resource(pdev, 1); + if (!pll_base) + return -ENXIO; + sys_base = devm_platform_ioremap_resource(pdev, 2); + if (!sys_base) + return -ENXIO; + + /* enable default clks */ + for (i = 0; i < ARRAY_SIZE(sp_clken); i++) + writel((sp_clken[i] << 16) | sp_clken[i], clk_base + i * 4); + + clk_data = devm_kzalloc(dev, struct_size(clk_data, hws, CLK_MAX), + GFP_KERNEL); + if (!clk_data) + return -ENOMEM; + + hws = clk_data->hws; + pd_ext.index = 0; + + /* PLLs */ + hws[PLL_A] = sp_pll_register(dev, "plla", &pd_ext, PLLA_CTL, + 11, 12, 27000000, 0, DIV_A, 0); + if (IS_ERR(hws[PLL_A])) + return PTR_ERR(hws[PLL_A]); + + hws[PLL_E] = sp_pll_register(dev, "plle", &pd_ext, PLLE_CTL, + 6, 2, 50000000, 0, 0, 0); + if (IS_ERR(hws[PLL_E])) + return PTR_ERR(hws[PLL_E]); + pd_e.hw = hws[PLL_E]; + hws[PLL_E_2P5] = sp_pll_register(dev, "plle_2p5", &pd_e, PLLE_CTL, + 13, -1, 2500000, 0, 0, 0); + if (IS_ERR(hws[PLL_E_2P5])) + return PTR_ERR(hws[PLL_E_2P5]); + hws[PLL_E_25] = sp_pll_register(dev, "plle_25", &pd_e, PLLE_CTL, + 12, -1, 25000000, 0, 0, 0); + if (IS_ERR(hws[PLL_E_25])) + return PTR_ERR(hws[PLL_E_25]); + hws[PLL_E_112P5] = sp_pll_register(dev, "plle_112p5", &pd_e, PLLE_CTL, + 11, -1, 112500000, 0, 0, 0); + if (IS_ERR(hws[PLL_E_112P5])) + return PTR_ERR(hws[PLL_E_112P5]); + + hws[PLL_F] = sp_pll_register(dev, "pllf", &pd_ext, PLLF_CTL, + 0, 10, 13500000, 1, 4, 0); + if (IS_ERR(hws[PLL_F])) + return PTR_ERR(hws[PLL_F]); + + hws[PLL_TV] = sp_pll_register(dev, "plltv", &pd_ext, PLLTV_CTL, + 0, 15, 27000000, 0, DIV_TV, 0); + if (IS_ERR(hws[PLL_TV])) + return PTR_ERR(hws[PLL_TV]); + hws[PLL_TV_A] = devm_clk_hw_register_divider(dev, "plltv_a", "plltv", 0, + PLLTV_CTL + 4, 5, 1, + CLK_DIVIDER_POWER_OF_TWO, + &to_sp_pll(hws[PLL_TV])->lock); + if (IS_ERR(hws[PLL_TV_A])) + return PTR_ERR(hws[PLL_TV_A]); + + /* system clock, should not be disabled */ + hws[PLL_SYS] = sp_pll_register(dev, "pllsys", &pd_ext, sys_base, + 10, 9, 13500000, 0, 4, CLK_IS_CRITICAL); + if (IS_ERR(hws[PLL_SYS])) + return PTR_ERR(hws[PLL_SYS]); + pd_sys.hw = hws[PLL_SYS]; + + /* gates */ + for (i = 0; i < ARRAY_SIZE(sp_clk_gates); i++) { + char name[10]; + u32 j = sp_clk_gates[i].reg; + struct clk_parent_data *pd = sp_clk_gates[i].ext_parent ? &pd_ext : &pd_sys; + + sprintf(name, "%02d_0x%02x", i, j); + hws[i] = clk_hw_register_gate_parent_data(dev, name, pd, 0, + clk_base + (j >> 4) * 4, + j & 0x0f, + CLK_GATE_HIWORD_MASK, + NULL); + if (IS_ERR(hws[i])) { + ret = PTR_ERR(hws[i]); + goto unregister_gates; + } + } + + clk_data->num = CLK_MAX; + ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, clk_data); + if (ret) + goto unregister_gates; + + return 0; + +unregister_gates: + while (i--) + clk_hw_unregister_gate(hws[i]); + + return ret; +} + +static const struct of_device_id sp7021_clk_dt_ids[] = { + { .compatible = "sunplus,sp7021-clkc" }, + { } +}; +MODULE_DEVICE_TABLE(of, sp7021_clk_dt_ids); + +static struct platform_driver sp7021_clk_driver = { + .probe = sp7021_clk_probe, + .driver = { + .name = "sp7021-clk", + .of_match_table = sp7021_clk_dt_ids, + }, +}; +module_platform_driver(sp7021_clk_driver); + +MODULE_AUTHOR("Sunplus Technology"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Clock driver for Sunplus SP7021 SoC"); -- 2.33.1
