diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index 299bc678ed1b..bb8f4fb5f996 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -226,6 +226,17 @@ config COMMON_CLK_EP93XX help This driver supports the SoC clocks on the Cirrus Logic ep93xx. +config COMMON_CLK_EYEQ + bool "Clock driver for the Mobileye EyeQ platform" + depends on MACH_EYEQ5 || MACH_EYEQ6H || COMPILE_TEST + select AUXILIARY_BUS + default MACH_EYEQ5 || MACH_EYEQ6H + help + This driver provides clocks found on Mobileye EyeQ5, EyeQ6L and Eye6H + SoCs. Controllers live in shared register regions called OLB. Driver + provides read-only PLLs, derived from the main crystal clock (which + must be constant). It also exposes some divider clocks. + config COMMON_CLK_FSL_FLEXSPI tristate "Clock driver for FlexSPI on Layerscape SoCs" depends on ARCH_LAYERSCAPE || COMPILE_TEST diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index fb8878a5d7d9..9818a9445254 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -42,6 +42,7 @@ obj-$(CONFIG_COMMON_CLK_CS2000_CP) += clk-cs2000-cp.o obj-$(CONFIG_COMMON_CLK_EP93XX) += clk-ep93xx.o obj-$(CONFIG_ARCH_SPARX5) += clk-sparx5.o obj-$(CONFIG_COMMON_CLK_EN7523) += clk-en7523.o +obj-$(CONFIG_COMMON_CLK_EYEQ) += clk-eyeq.o obj-$(CONFIG_COMMON_CLK_FIXED_MMIO) += clk-fixed-mmio.o obj-$(CONFIG_COMMON_CLK_FSL_FLEXSPI) += clk-fsl-flexspi.o obj-$(CONFIG_COMMON_CLK_FSL_SAI) += clk-fsl-sai.o diff --git a/drivers/clk/clk-eyeq.c b/drivers/clk/clk-eyeq.c new file mode 100644 index 000000000000..77f1afb020a0 --- /dev/null +++ b/drivers/clk/clk-eyeq.c @@ -0,0 +1,695 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * PLL clock driver for the Mobileye EyeQ5, EyeQ6L and EyeQ6H platforms. + * + * This controller handles read-only PLLs, all derived from the same main + * crystal clock. It also exposes divider clocks, those are children to PLLs. + * Parent clock is expected to be constant. This driver's registers live in + * a shared region called OLB. Some PLLs are initialised early by of_clk_init(); + * if so, two clk providers are registered. + * + * We use eqc_ as prefix, as-in "EyeQ Clock", but way shorter. + * + * Copyright (C) 2024 Mobileye Vision Technologies Ltd. + */ + +/* + * Set pr_fmt() for printing from eqc_early_init(). + * It is called at of_clk_init() stage (read: really early). + */ +#define pr_fmt(fmt) "clk-eyeq: " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +/* In frac mode, it enables fractional noise canceling DAC. Else, no function. */ +#define PCSR0_DAC_EN BIT(0) +/* Fractional or integer mode */ +#define PCSR0_DSM_EN BIT(1) +#define PCSR0_PLL_EN BIT(2) +/* All clocks output held at 0 */ +#define PCSR0_FOUTPOSTDIV_EN BIT(3) +#define PCSR0_POST_DIV1 GENMASK(6, 4) +#define PCSR0_POST_DIV2 GENMASK(9, 7) +#define PCSR0_REF_DIV GENMASK(15, 10) +#define PCSR0_INTIN GENMASK(27, 16) +#define PCSR0_BYPASS BIT(28) +/* Bits 30..29 are reserved */ +#define PCSR0_PLL_LOCKED BIT(31) + +#define PCSR1_RESET BIT(0) +#define PCSR1_SSGC_DIV GENMASK(4, 1) +/* Spread amplitude (% = 0.1 * SPREAD[4:0]) */ +#define PCSR1_SPREAD GENMASK(9, 5) +#define PCSR1_DIS_SSCG BIT(10) +/* Down-spread or center-spread */ +#define PCSR1_DOWN_SPREAD BIT(11) +#define PCSR1_FRAC_IN GENMASK(31, 12) + +struct eqc_pll { + unsigned int index; + const char *name; + unsigned int reg64; +}; + +/* + * Divider clock. Divider is 2*(v+1), with v the register value. + * Min divider is 2, max is 2*(2^width). + */ +struct eqc_div { + unsigned int index; + const char *name; + unsigned int parent; + unsigned int reg; + u8 shift; + u8 width; +}; + +struct eqc_match_data { + unsigned int pll_count; + const struct eqc_pll *plls; + + unsigned int div_count; + const struct eqc_div *divs; + + const char *reset_auxdev_name; + const char *pinctrl_auxdev_name; + + unsigned int early_clk_count; +}; + +struct eqc_early_match_data { + unsigned int early_pll_count; + const struct eqc_pll *early_plls; + + /* + * We want our of_xlate callback to EPROBE_DEFER instead of dev_err() + * and EINVAL. For that, we must know the total clock count. + */ + unsigned int late_clk_count; +}; + +/* + * Both factors (mult and div) must fit in 32 bits. When an operation overflows, + * this function throws away low bits so that factors still fit in 32 bits. + * + * Precision loss depends on amplitude of mult and div. Worst theorical + * loss is: (UINT_MAX+1) / UINT_MAX - 1 = 2.3e-10. + * This is 1Hz every 4.3GHz. + */ +static void eqc_pll_downshift_factors(unsigned long *mult, unsigned long *div) +{ + unsigned long biggest; + unsigned int shift; + + /* This function can be removed if mult/div switch to unsigned long. */ + static_assert(sizeof_field(struct clk_fixed_factor, mult) == sizeof(unsigned int)); + static_assert(sizeof_field(struct clk_fixed_factor, div) == sizeof(unsigned int)); + + /* No overflow, nothing to be done. */ + if (*mult <= UINT_MAX && *div <= UINT_MAX) + return; + + /* + * Compute the shift required to bring the biggest factor into unsigned + * int range. That is, shift its highest set bit to the unsigned int + * most significant bit. + */ + biggest = max(*mult, *div); + shift = __fls(biggest) - (BITS_PER_BYTE * sizeof(unsigned int)) + 1; + + *mult >>= shift; + *div >>= shift; +} + +static int eqc_pll_parse_registers(u32 r0, u32 r1, unsigned long *mult, + unsigned long *div, unsigned long *acc) +{ + u32 spread; + + if (r0 & PCSR0_BYPASS) { + *mult = 1; + *div = 1; + *acc = 0; + return 0; + } + + if (!(r0 & PCSR0_PLL_LOCKED)) + return -EINVAL; + + *mult = FIELD_GET(PCSR0_INTIN, r0); + *div = FIELD_GET(PCSR0_REF_DIV, r0); + if (r0 & PCSR0_FOUTPOSTDIV_EN) + *div *= FIELD_GET(PCSR0_POST_DIV1, r0) * FIELD_GET(PCSR0_POST_DIV2, r0); + + /* Fractional mode, in 2^20 (0x100000) parts. */ + if (r0 & PCSR0_DSM_EN) { + *div *= (1ULL << 20); + *mult = *mult * (1ULL << 20) + FIELD_GET(PCSR1_FRAC_IN, r1); + } + + if (!*mult || !*div) + return -EINVAL; + + if (r1 & (PCSR1_RESET | PCSR1_DIS_SSCG)) { + *acc = 0; + return 0; + } + + /* + * Spread spectrum. + * + * Spread is 1/1000 parts of frequency, accuracy is half of + * that. To get accuracy, convert to ppb (parts per billion). + * + * acc = spread * 1e6 / 2 + * with acc in parts per billion and, + * spread in parts per thousand. + */ + spread = FIELD_GET(PCSR1_SPREAD, r1); + *acc = spread * 500000; + + if (r1 & PCSR1_DOWN_SPREAD) { + /* + * Downspreading: the central frequency is half a + * spread lower. + */ + *mult *= 2000 - spread; + *div *= 2000; + + /* + * Previous operation might overflow 32 bits. If it + * does, throw away the least amount of low bits. + */ + eqc_pll_downshift_factors(mult, div); + } + + return 0; +} + +static void eqc_probe_init_plls(struct device *dev, const struct eqc_match_data *data, + void __iomem *base, struct clk_hw_onecell_data *cells) +{ + unsigned long mult, div, acc; + const struct eqc_pll *pll; + struct clk_hw *hw; + unsigned int i; + u32 r0, r1; + u64 val; + int ret; + + for (i = 0; i < data->pll_count; i++) { + pll = &data->plls[i]; + + val = readq(base + pll->reg64); + r0 = val; + r1 = val >> 32; + + ret = eqc_pll_parse_registers(r0, r1, &mult, &div, &acc); + if (ret) { + dev_warn(dev, "failed parsing state of %s\n", pll->name); + cells->hws[pll->index] = ERR_PTR(ret); + continue; + } + + hw = clk_hw_register_fixed_factor_with_accuracy_fwname(dev, + dev->of_node, pll->name, "ref", 0, mult, div, acc); + cells->hws[pll->index] = hw; + if (IS_ERR(hw)) + dev_warn(dev, "failed registering %s: %pe\n", pll->name, hw); + } +} + +static void eqc_probe_init_divs(struct device *dev, const struct eqc_match_data *data, + void __iomem *base, struct clk_hw_onecell_data *cells) +{ + struct clk_parent_data parent_data = { }; + const struct eqc_div *div; + struct clk_hw *parent; + void __iomem *reg; + struct clk_hw *hw; + unsigned int i; + + for (i = 0; i < data->div_count; i++) { + div = &data->divs[i]; + reg = base + div->reg; + parent = cells->hws[div->parent]; + + if (IS_ERR(parent)) { + /* Parent is in early clk provider. */ + parent_data.index = div->parent; + parent_data.hw = NULL; + } else { + /* Avoid clock lookup when we already have the hw reference. */ + parent_data.index = 0; + parent_data.hw = parent; + } + + hw = clk_hw_register_divider_table_parent_data(dev, div->name, + &parent_data, 0, reg, div->shift, div->width, + CLK_DIVIDER_EVEN_INTEGERS, NULL, NULL); + cells->hws[div->index] = hw; + if (IS_ERR(hw)) + dev_warn(dev, "failed registering %s: %pe\n", + div->name, hw); + } +} + +static void eqc_auxdev_release(struct device *dev) +{ + struct auxiliary_device *adev = to_auxiliary_dev(dev); + + kfree(adev); +} + +static int eqc_auxdev_create(struct device *dev, void __iomem *base, + const char *name, u32 id) +{ + struct auxiliary_device *adev; + int ret; + + adev = kzalloc(sizeof(*adev), GFP_KERNEL); + if (!adev) + return -ENOMEM; + + adev->name = name; + adev->dev.parent = dev; + adev->dev.platform_data = (void __force *)base; + adev->dev.release = eqc_auxdev_release; + adev->id = id; + + ret = auxiliary_device_init(adev); + if (ret) + return ret; + + ret = auxiliary_device_add(adev); + if (ret) + auxiliary_device_uninit(adev); + + return ret; +} + +static int eqc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + const struct eqc_match_data *data; + struct clk_hw_onecell_data *cells; + unsigned int i, clk_count; + struct resource *res; + void __iomem *base; + int ret; + + data = device_get_match_data(dev); + if (!data) + return 0; /* No clocks nor auxdevs, we are done. */ + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + + base = ioremap(res->start, resource_size(res)); + if (!base) + return -ENOMEM; + + /* Init optional reset auxiliary device. */ + if (data->reset_auxdev_name) { + ret = eqc_auxdev_create(dev, base, data->reset_auxdev_name, 0); + if (ret) + dev_warn(dev, "failed creating auxiliary device %s.%s: %d\n", + KBUILD_MODNAME, data->reset_auxdev_name, ret); + } + + /* Init optional pinctrl auxiliary device. */ + if (data->pinctrl_auxdev_name) { + ret = eqc_auxdev_create(dev, base, data->pinctrl_auxdev_name, 0); + if (ret) + dev_warn(dev, "failed creating auxiliary device %s.%s: %d\n", + KBUILD_MODNAME, data->pinctrl_auxdev_name, ret); + } + + if (data->pll_count + data->div_count == 0) + return 0; /* Zero clocks, we are done. */ + + clk_count = data->pll_count + data->div_count + data->early_clk_count; + cells = kzalloc(struct_size(cells, hws, clk_count), GFP_KERNEL); + if (!cells) + return -ENOMEM; + + cells->num = clk_count; + + /* Early PLLs are marked as errors: the early provider will get queried. */ + for (i = 0; i < clk_count; i++) + cells->hws[i] = ERR_PTR(-EINVAL); + + eqc_probe_init_plls(dev, data, base, cells); + + eqc_probe_init_divs(dev, data, base, cells); + + /* When providing a single clock, require no cell. */ + if (clk_count == 1) + return of_clk_add_hw_provider(np, of_clk_hw_simple_get, cells->hws[0]); + else + return of_clk_add_hw_provider(np, of_clk_hw_onecell_get, cells); +} + +/* Required early for GIC timer (pll-cpu) and UARTs (pll-per). */ +static const struct eqc_pll eqc_eyeq5_early_plls[] = { + { .index = EQ5C_PLL_CPU, .name = "pll-cpu", .reg64 = 0x02C }, + { .index = EQ5C_PLL_PER, .name = "pll-per", .reg64 = 0x05C }, +}; + +static const struct eqc_pll eqc_eyeq5_plls[] = { + { .index = EQ5C_PLL_VMP, .name = "pll-vmp", .reg64 = 0x034 }, + { .index = EQ5C_PLL_PMA, .name = "pll-pma", .reg64 = 0x03C }, + { .index = EQ5C_PLL_VDI, .name = "pll-vdi", .reg64 = 0x044 }, + { .index = EQ5C_PLL_DDR0, .name = "pll-ddr0", .reg64 = 0x04C }, + { .index = EQ5C_PLL_PCI, .name = "pll-pci", .reg64 = 0x054 }, + { .index = EQ5C_PLL_PMAC, .name = "pll-pmac", .reg64 = 0x064 }, + { .index = EQ5C_PLL_MPC, .name = "pll-mpc", .reg64 = 0x06C }, + { .index = EQ5C_PLL_DDR1, .name = "pll-ddr1", .reg64 = 0x074 }, +}; + +static const struct eqc_div eqc_eyeq5_divs[] = { + { + .index = EQ5C_DIV_OSPI, + .name = "div-ospi", + .parent = EQ5C_PLL_PER, + .reg = 0x11C, + .shift = 0, + .width = 4, + }, +}; + +static const struct eqc_early_match_data eqc_eyeq5_early_match_data __initconst = { + .early_pll_count = ARRAY_SIZE(eqc_eyeq5_early_plls), + .early_plls = eqc_eyeq5_early_plls, + + .late_clk_count = ARRAY_SIZE(eqc_eyeq5_plls) + ARRAY_SIZE(eqc_eyeq5_divs), +}; + +static const struct eqc_match_data eqc_eyeq5_match_data = { + .pll_count = ARRAY_SIZE(eqc_eyeq5_plls), + .plls = eqc_eyeq5_plls, + + .div_count = ARRAY_SIZE(eqc_eyeq5_divs), + .divs = eqc_eyeq5_divs, + + .reset_auxdev_name = "reset", + .pinctrl_auxdev_name = "pinctrl", + + .early_clk_count = ARRAY_SIZE(eqc_eyeq5_early_plls), +}; + +static const struct eqc_pll eqc_eyeq6l_plls[] = { + { .index = EQ6LC_PLL_DDR, .name = "pll-ddr", .reg64 = 0x02C }, + { .index = EQ6LC_PLL_CPU, .name = "pll-cpu", .reg64 = 0x034 }, /* also acc */ + { .index = EQ6LC_PLL_PER, .name = "pll-per", .reg64 = 0x03C }, + { .index = EQ6LC_PLL_VDI, .name = "pll-vdi", .reg64 = 0x044 }, +}; + +static const struct eqc_match_data eqc_eyeq6l_match_data = { + .pll_count = ARRAY_SIZE(eqc_eyeq6l_plls), + .plls = eqc_eyeq6l_plls, + + .reset_auxdev_name = "reset", +}; + +static const struct eqc_match_data eqc_eyeq6h_west_match_data = { + .reset_auxdev_name = "reset_west", +}; + +static const struct eqc_pll eqc_eyeq6h_east_plls[] = { + { .index = 0, .name = "pll-east", .reg64 = 0x074 }, +}; + +static const struct eqc_match_data eqc_eyeq6h_east_match_data = { + .pll_count = ARRAY_SIZE(eqc_eyeq6h_east_plls), + .plls = eqc_eyeq6h_east_plls, + + .reset_auxdev_name = "reset_east", +}; + +static const struct eqc_pll eqc_eyeq6h_south_plls[] = { + { .index = EQ6HC_SOUTH_PLL_VDI, .name = "pll-vdi", .reg64 = 0x000 }, + { .index = EQ6HC_SOUTH_PLL_PCIE, .name = "pll-pcie", .reg64 = 0x008 }, + { .index = EQ6HC_SOUTH_PLL_PER, .name = "pll-per", .reg64 = 0x010 }, + { .index = EQ6HC_SOUTH_PLL_ISP, .name = "pll-isp", .reg64 = 0x018 }, +}; + +static const struct eqc_div eqc_eyeq6h_south_divs[] = { + { + .index = EQ6HC_SOUTH_DIV_EMMC, + .name = "div-emmc", + .parent = EQ6HC_SOUTH_PLL_PER, + .reg = 0x070, + .shift = 4, + .width = 4, + }, + { + .index = EQ6HC_SOUTH_DIV_OSPI_REF, + .name = "div-ospi-ref", + .parent = EQ6HC_SOUTH_PLL_PER, + .reg = 0x090, + .shift = 4, + .width = 4, + }, + { + .index = EQ6HC_SOUTH_DIV_OSPI_SYS, + .name = "div-ospi-sys", + .parent = EQ6HC_SOUTH_PLL_PER, + .reg = 0x090, + .shift = 8, + .width = 1, + }, + { + .index = EQ6HC_SOUTH_DIV_TSU, + .name = "div-tsu", + .parent = EQ6HC_SOUTH_PLL_PCIE, + .reg = 0x098, + .shift = 4, + .width = 8, + }, +}; + +static const struct eqc_match_data eqc_eyeq6h_south_match_data = { + .pll_count = ARRAY_SIZE(eqc_eyeq6h_south_plls), + .plls = eqc_eyeq6h_south_plls, + + .div_count = ARRAY_SIZE(eqc_eyeq6h_south_divs), + .divs = eqc_eyeq6h_south_divs, +}; + +static const struct eqc_pll eqc_eyeq6h_ddr0_plls[] = { + { .index = 0, .name = "pll-ddr0", .reg64 = 0x074 }, +}; + +static const struct eqc_match_data eqc_eyeq6h_ddr0_match_data = { + .pll_count = ARRAY_SIZE(eqc_eyeq6h_ddr0_plls), + .plls = eqc_eyeq6h_ddr0_plls, +}; + +static const struct eqc_pll eqc_eyeq6h_ddr1_plls[] = { + { .index = 0, .name = "pll-ddr1", .reg64 = 0x074 }, +}; + +static const struct eqc_match_data eqc_eyeq6h_ddr1_match_data = { + .pll_count = ARRAY_SIZE(eqc_eyeq6h_ddr1_plls), + .plls = eqc_eyeq6h_ddr1_plls, +}; + +static const struct eqc_pll eqc_eyeq6h_acc_plls[] = { + { .index = EQ6HC_ACC_PLL_XNN, .name = "pll-xnn", .reg64 = 0x040 }, + { .index = EQ6HC_ACC_PLL_VMP, .name = "pll-vmp", .reg64 = 0x050 }, + { .index = EQ6HC_ACC_PLL_PMA, .name = "pll-pma", .reg64 = 0x05C }, + { .index = EQ6HC_ACC_PLL_MPC, .name = "pll-mpc", .reg64 = 0x068 }, + { .index = EQ6HC_ACC_PLL_NOC, .name = "pll-noc", .reg64 = 0x070 }, +}; + +static const struct eqc_match_data eqc_eyeq6h_acc_match_data = { + .pll_count = ARRAY_SIZE(eqc_eyeq6h_acc_plls), + .plls = eqc_eyeq6h_acc_plls, + + .reset_auxdev_name = "reset_acc", +}; + +static const struct of_device_id eqc_match_table[] = { + { .compatible = "mobileye,eyeq5-olb", .data = &eqc_eyeq5_match_data }, + { .compatible = "mobileye,eyeq6l-olb", .data = &eqc_eyeq6l_match_data }, + { .compatible = "mobileye,eyeq6h-west-olb", .data = &eqc_eyeq6h_west_match_data }, + { .compatible = "mobileye,eyeq6h-east-olb", .data = &eqc_eyeq6h_east_match_data }, + { .compatible = "mobileye,eyeq6h-south-olb", .data = &eqc_eyeq6h_south_match_data }, + { .compatible = "mobileye,eyeq6h-ddr0-olb", .data = &eqc_eyeq6h_ddr0_match_data }, + { .compatible = "mobileye,eyeq6h-ddr1-olb", .data = &eqc_eyeq6h_ddr1_match_data }, + { .compatible = "mobileye,eyeq6h-acc-olb", .data = &eqc_eyeq6h_acc_match_data }, + {} +}; + +static struct platform_driver eqc_driver = { + .probe = eqc_probe, + .driver = { + .name = "clk-eyeq", + .of_match_table = eqc_match_table, + .suppress_bind_attrs = true, + }, +}; +builtin_platform_driver(eqc_driver); + +/* Required early for GIC timer. */ +static const struct eqc_pll eqc_eyeq6h_central_early_plls[] = { + { .index = 0, .name = "pll-cpu", .reg64 = 0x02C }, +}; + +static const struct eqc_early_match_data eqc_eyeq6h_central_early_match_data __initconst = { + .early_pll_count = ARRAY_SIZE(eqc_eyeq6h_central_early_plls), + .early_plls = eqc_eyeq6h_central_early_plls, +}; + +/* Required early for UART. */ +static const struct eqc_pll eqc_eyeq6h_west_early_plls[] = { + { .index = 0, .name = "pll-west", .reg64 = 0x074 }, +}; + +static const struct eqc_early_match_data eqc_eyeq6h_west_early_match_data __initconst = { + .early_pll_count = ARRAY_SIZE(eqc_eyeq6h_west_early_plls), + .early_plls = eqc_eyeq6h_west_early_plls, +}; + +static void __init eqc_early_init(struct device_node *np, + const struct eqc_early_match_data *early_data) +{ + struct clk_hw_onecell_data *cells; + unsigned int i, clk_count; + void __iomem *base; + int ret; + + clk_count = early_data->early_pll_count + early_data->late_clk_count; + cells = kzalloc(struct_size(cells, hws, clk_count), GFP_KERNEL); + if (!cells) { + ret = -ENOMEM; + goto err; + } + + cells->num = clk_count; + + /* + * Mark all clocks as deferred; some are registered here, the rest at + * platform device probe. + * + * Once the platform device is probed, its provider will take priority + * when looking up clocks. + */ + for (i = 0; i < clk_count; i++) + cells->hws[i] = ERR_PTR(-EPROBE_DEFER); + + /* Offsets (reg64) of early PLLs are relative to OLB block. */ + base = of_iomap(np, 0); + if (!base) { + ret = -ENODEV; + goto err; + } + + for (i = 0; i < early_data->early_pll_count; i++) { + const struct eqc_pll *pll = &early_data->early_plls[i]; + unsigned long mult, div, acc; + struct clk_hw *hw; + u32 r0, r1; + u64 val; + + val = readq(base + pll->reg64); + r0 = val; + r1 = val >> 32; + + ret = eqc_pll_parse_registers(r0, r1, &mult, &div, &acc); + if (ret) { + pr_err("failed parsing state of %s\n", pll->name); + goto err; + } + + hw = clk_hw_register_fixed_factor_with_accuracy_fwname(NULL, + np, pll->name, "ref", 0, mult, div, acc); + cells->hws[pll->index] = hw; + if (IS_ERR(hw)) { + pr_err("failed registering %s: %pe\n", pll->name, hw); + ret = PTR_ERR(hw); + goto err; + } + } + + /* When providing a single clock, require no cell. */ + if (clk_count == 1) + ret = of_clk_add_hw_provider(np, of_clk_hw_simple_get, cells->hws[0]); + else + ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, cells); + if (ret) { + pr_err("failed registering clk provider: %d\n", ret); + goto err; + } + + return; + +err: + /* + * We are doomed. The system will not be able to boot. + * + * Let's still try to be good citizens by freeing resources and print + * a last error message that might help debugging. + */ + + pr_err("failed clk init: %d\n", ret); + + if (cells) { + of_clk_del_provider(np); + + for (i = 0; i < early_data->early_pll_count; i++) { + const struct eqc_pll *pll = &early_data->early_plls[i]; + struct clk_hw *hw = cells->hws[pll->index]; + + if (!IS_ERR_OR_NULL(hw)) + clk_hw_unregister_fixed_factor(hw); + } + + kfree(cells); + } +} + +static void __init eqc_eyeq5_early_init(struct device_node *np) +{ + eqc_early_init(np, &eqc_eyeq5_early_match_data); +} +CLK_OF_DECLARE_DRIVER(eqc_eyeq5, "mobileye,eyeq5-olb", eqc_eyeq5_early_init); + +static void __init eqc_eyeq6h_central_early_init(struct device_node *np) +{ + eqc_early_init(np, &eqc_eyeq6h_central_early_match_data); +} +CLK_OF_DECLARE_DRIVER(eqc_eyeq6h_central, "mobileye,eyeq6h-central-olb", + eqc_eyeq6h_central_early_init); + +static void __init eqc_eyeq6h_west_early_init(struct device_node *np) +{ + eqc_early_init(np, &eqc_eyeq6h_west_early_match_data); +} +CLK_OF_DECLARE_DRIVER(eqc_eyeq6h_west, "mobileye,eyeq6h-west-olb", + eqc_eyeq6h_west_early_init);