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path: root/drivers/clk/clk-eyeq.c
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-rw-r--r--drivers/clk/clk-eyeq.c859
1 files changed, 859 insertions, 0 deletions
diff --git a/drivers/clk/clk-eyeq.c b/drivers/clk/clk-eyeq.c
new file mode 100644
index 000000000000..640c25788487
--- /dev/null
+++ b/drivers/clk/clk-eyeq.c
@@ -0,0 +1,859 @@
+// 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.
+ * - Fixed factor clocks, children to PLLs.
+ *
+ * Parent clock is expected to be constant. This driver's registers live in a
+ * shared region called OLB. Some PLLs and fixed-factors 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 <linux/array_size.h>
+#include <linux/auxiliary_bus.h>
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/io-64-nonatomic-hi-lo.h>
+#include <linux/io.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/overflow.h>
+#include <linux/platform_device.h>
+#include <linux/printk.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+#include <dt-bindings/clock/mobileye,eyeq5-clk.h>
+
+/* 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_fixed_factor {
+ unsigned int index;
+ const char *name;
+ unsigned int mult;
+ unsigned int div;
+ unsigned int parent;
+};
+
+struct eqc_match_data {
+ unsigned int pll_count;
+ const struct eqc_pll *plls;
+
+ unsigned int div_count;
+ const struct eqc_div *divs;
+
+ unsigned int fixed_factor_count;
+ const struct eqc_fixed_factor *fixed_factors;
+
+ 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;
+
+ unsigned int early_fixed_factor_count;
+ const struct eqc_fixed_factor *early_fixed_factors;
+
+ /*
+ * 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_probe_init_fixed_factors(struct device *dev,
+ const struct eqc_match_data *data,
+ struct clk_hw_onecell_data *cells)
+{
+ const struct eqc_fixed_factor *ff;
+ struct clk_hw *hw, *parent_hw;
+ unsigned int i;
+
+ for (i = 0; i < data->fixed_factor_count; i++) {
+ ff = &data->fixed_factors[i];
+ parent_hw = cells->hws[ff->parent];
+
+ if (IS_ERR(parent_hw)) {
+ /* Parent is in early clk provider. */
+ hw = clk_hw_register_fixed_factor_index(dev, ff->name,
+ ff->parent, 0, ff->mult, ff->div);
+ } else {
+ /* Avoid clock lookup when we already have the hw reference. */
+ hw = clk_hw_register_fixed_factor_parent_hw(dev, ff->name,
+ parent_hw, 0, ff->mult, ff->div);
+ }
+
+ cells->hws[ff->index] = hw;
+ if (IS_ERR(hw))
+ dev_warn(dev, "failed registering %s: %pe\n",
+ ff->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 + data->fixed_factor_count == 0)
+ return 0; /* Zero clocks, we are done. */
+
+ clk_count = data->pll_count + data->div_count +
+ data->fixed_factor_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);
+
+ eqc_probe_init_fixed_factors(dev, data, cells);
+
+ 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 },
+};
+
+enum {
+ /*
+ * EQ5C_PLL_CPU children.
+ * EQ5C_PER_OCC_PCI is the last clock exposed in dt-bindings.
+ */
+ EQ5C_CPU_OCC = EQ5C_PER_OCC_PCI + 1,
+ EQ5C_CPU_SI_CSS0,
+ EQ5C_CPU_CPC,
+ EQ5C_CPU_CM,
+ EQ5C_CPU_MEM,
+ EQ5C_CPU_OCC_ISRAM,
+ EQ5C_CPU_ISRAM,
+ EQ5C_CPU_OCC_DBU,
+ EQ5C_CPU_SI_DBU_TP,
+
+ /*
+ * EQ5C_PLL_VDI children.
+ */
+ EQ5C_VDI_OCC_VDI,
+ EQ5C_VDI_VDI,
+ EQ5C_VDI_OCC_CAN_SER,
+ EQ5C_VDI_CAN_SER,
+ EQ5C_VDI_I2C_SER,
+
+ /*
+ * EQ5C_PLL_PER children.
+ */
+ EQ5C_PER_PERIPH,
+ EQ5C_PER_CAN,
+ EQ5C_PER_TIMER,
+ EQ5C_PER_CCF,
+ EQ5C_PER_OCC_MJPEG,
+ EQ5C_PER_HSM,
+ EQ5C_PER_MJPEG,
+ EQ5C_PER_FCMU_A,
+};
+
+static const struct eqc_fixed_factor eqc_eyeq5_early_fixed_factors[] = {
+ /* EQ5C_PLL_CPU children */
+ { EQ5C_CPU_OCC, "occ-cpu", 1, 1, EQ5C_PLL_CPU },
+ { EQ5C_CPU_SI_CSS0, "si-css0", 1, 1, EQ5C_CPU_OCC },
+ { EQ5C_CPU_CORE0, "core0", 1, 1, EQ5C_CPU_SI_CSS0 },
+ { EQ5C_CPU_CORE1, "core1", 1, 1, EQ5C_CPU_SI_CSS0 },
+ { EQ5C_CPU_CORE2, "core2", 1, 1, EQ5C_CPU_SI_CSS0 },
+ { EQ5C_CPU_CORE3, "core3", 1, 1, EQ5C_CPU_SI_CSS0 },
+
+ /* EQ5C_PLL_PER children */
+ { EQ5C_PER_OCC, "occ-periph", 1, 16, EQ5C_PLL_PER },
+ { EQ5C_PER_UART, "uart", 1, 1, EQ5C_PER_OCC },
+};
+
+static const struct eqc_fixed_factor eqc_eyeq5_fixed_factors[] = {
+ /* EQ5C_PLL_CPU children */
+ { EQ5C_CPU_CPC, "cpc", 1, 1, EQ5C_CPU_SI_CSS0 },
+ { EQ5C_CPU_CM, "cm", 1, 1, EQ5C_CPU_SI_CSS0 },
+ { EQ5C_CPU_MEM, "mem", 1, 1, EQ5C_CPU_SI_CSS0 },
+ { EQ5C_CPU_OCC_ISRAM, "occ-isram", 1, 2, EQ5C_PLL_CPU },
+ { EQ5C_CPU_ISRAM, "isram", 1, 1, EQ5C_CPU_OCC_ISRAM },
+ { EQ5C_CPU_OCC_DBU, "occ-dbu", 1, 10, EQ5C_PLL_CPU },
+ { EQ5C_CPU_SI_DBU_TP, "si-dbu-tp", 1, 1, EQ5C_CPU_OCC_DBU },
+
+ /* EQ5C_PLL_VDI children */
+ { EQ5C_VDI_OCC_VDI, "occ-vdi", 1, 2, EQ5C_PLL_VDI },
+ { EQ5C_VDI_VDI, "vdi", 1, 1, EQ5C_VDI_OCC_VDI },
+ { EQ5C_VDI_OCC_CAN_SER, "occ-can-ser", 1, 16, EQ5C_PLL_VDI },
+ { EQ5C_VDI_CAN_SER, "can-ser", 1, 1, EQ5C_VDI_OCC_CAN_SER },
+ { EQ5C_VDI_I2C_SER, "i2c-ser", 1, 20, EQ5C_PLL_VDI },
+
+ /* EQ5C_PLL_PER children */
+ { EQ5C_PER_PERIPH, "periph", 1, 1, EQ5C_PER_OCC },
+ { EQ5C_PER_CAN, "can", 1, 1, EQ5C_PER_OCC },
+ { EQ5C_PER_SPI, "spi", 1, 1, EQ5C_PER_OCC },
+ { EQ5C_PER_I2C, "i2c", 1, 1, EQ5C_PER_OCC },
+ { EQ5C_PER_TIMER, "timer", 1, 1, EQ5C_PER_OCC },
+ { EQ5C_PER_GPIO, "gpio", 1, 1, EQ5C_PER_OCC },
+ { EQ5C_PER_EMMC, "emmc-sys", 1, 10, EQ5C_PLL_PER },
+ { EQ5C_PER_CCF, "ccf-ctrl", 1, 4, EQ5C_PLL_PER },
+ { EQ5C_PER_OCC_MJPEG, "occ-mjpeg", 1, 2, EQ5C_PLL_PER },
+ { EQ5C_PER_HSM, "hsm", 1, 1, EQ5C_PER_OCC_MJPEG },
+ { EQ5C_PER_MJPEG, "mjpeg", 1, 1, EQ5C_PER_OCC_MJPEG },
+ { EQ5C_PER_FCMU_A, "fcmu-a", 1, 20, EQ5C_PLL_PER },
+ { EQ5C_PER_OCC_PCI, "occ-pci-sys", 1, 8, EQ5C_PLL_PER },
+};
+
+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,
+
+ .early_fixed_factor_count = ARRAY_SIZE(eqc_eyeq5_early_fixed_factors),
+ .early_fixed_factors = eqc_eyeq5_early_fixed_factors,
+
+ .late_clk_count = ARRAY_SIZE(eqc_eyeq5_plls) + ARRAY_SIZE(eqc_eyeq5_divs) +
+ ARRAY_SIZE(eqc_eyeq5_fixed_factors),
+};
+
+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,
+
+ .fixed_factor_count = ARRAY_SIZE(eqc_eyeq5_fixed_factors),
+ .fixed_factors = eqc_eyeq5_fixed_factors,
+
+ .reset_auxdev_name = "reset",
+ .pinctrl_auxdev_name = "pinctrl",
+
+ .early_clk_count = ARRAY_SIZE(eqc_eyeq5_early_plls) +
+ ARRAY_SIZE(eqc_eyeq5_early_fixed_factors),
+};
+
+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 = EQ6HC_CENTRAL_PLL_CPU, .name = "pll-cpu", .reg64 = 0x02C },
+};
+
+static const struct eqc_fixed_factor eqc_eyeq6h_central_early_fixed_factors[] = {
+ { EQ6HC_CENTRAL_CPU_OCC, "occ-cpu", 1, 1, EQ6HC_CENTRAL_PLL_CPU },
+};
+
+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,
+
+ .early_fixed_factor_count = ARRAY_SIZE(eqc_eyeq6h_central_early_fixed_factors),
+ .early_fixed_factors = eqc_eyeq6h_central_early_fixed_factors,
+};
+
+/* Required early for UART. */
+static const struct eqc_pll eqc_eyeq6h_west_early_plls[] = {
+ { .index = EQ6HC_WEST_PLL_PER, .name = "pll-west", .reg64 = 0x074 },
+};
+
+static const struct eqc_fixed_factor eqc_eyeq6h_west_early_fixed_factors[] = {
+ { EQ6HC_WEST_PER_OCC, "west-per-occ", 1, 10, EQ6HC_WEST_PLL_PER },
+ { EQ6HC_WEST_PER_UART, "west-per-uart", 1, 1, EQ6HC_WEST_PER_OCC },
+};
+
+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,
+
+ .early_fixed_factor_count = ARRAY_SIZE(eqc_eyeq6h_west_early_fixed_factors),
+ .early_fixed_factors = eqc_eyeq6h_west_early_fixed_factors,
+};
+
+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->early_fixed_factor_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;
+ }
+ }
+
+ for (i = 0; i < early_data->early_fixed_factor_count; i++) {
+ const struct eqc_fixed_factor *ff = &early_data->early_fixed_factors[i];
+ struct clk_hw *parent_hw = cells->hws[ff->parent];
+ struct clk_hw *hw;
+
+ hw = clk_hw_register_fixed_factor_parent_hw(NULL, ff->name,
+ parent_hw, 0, ff->mult, ff->div);
+ cells->hws[ff->index] = hw;
+ if (IS_ERR(hw)) {
+ pr_err("failed registering %s: %pe\n", ff->name, hw);
+ ret = PTR_ERR(hw);
+ goto err;
+ }
+ }
+
+ 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);
generated by cgit (git 2.34.1) at 2025-07-31 02:58:16 +0000