[v1 04/17] drivers: clk: Add clock driver for Intel N5X device
Siew Chin Lim
elly.siew.chin.lim at intel.com
Wed Mar 31 16:38:55 CEST 2021
Add clock manager driver for N5X. Provides clock initialization
and get_rate functions.
Signed-off-by: Siew Chin Lim <elly.siew.chin.lim at intel.com>
---
drivers/clk/altera/Makefile | 3 +-
drivers/clk/altera/clk-n5x.c | 489 ++++++++++++++++++++++++++++++++++
drivers/clk/altera/clk-n5x.h | 217 +++++++++++++++
include/dt-bindings/clock/n5x-clock.h | 71 +++++
4 files changed, 779 insertions(+), 1 deletion(-)
create mode 100644 drivers/clk/altera/clk-n5x.c
create mode 100644 drivers/clk/altera/clk-n5x.h
create mode 100644 include/dt-bindings/clock/n5x-clock.h
diff --git a/drivers/clk/altera/Makefile b/drivers/clk/altera/Makefile
index 96215ad5c4..38cd730685 100644
--- a/drivers/clk/altera/Makefile
+++ b/drivers/clk/altera/Makefile
@@ -1,7 +1,8 @@
# SPDX-License-Identifier: GPL-2.0+
#
-# Copyright (C) 2018 Marek Vasut <marex at denx.de>
+# Copyright (C) 2018-2021 Marek Vasut <marex at denx.de>
#
obj-$(CONFIG_TARGET_SOCFPGA_AGILEX) += clk-agilex.o
obj-$(CONFIG_TARGET_SOCFPGA_ARRIA10) += clk-arria10.o
+obj-$(CONFIG_TARGET_SOCFPGA_N5X) += clk-n5x.o
diff --git a/drivers/clk/altera/clk-n5x.c b/drivers/clk/altera/clk-n5x.c
new file mode 100644
index 0000000000..12e6aa9ac2
--- /dev/null
+++ b/drivers/clk/altera/clk-n5x.c
@@ -0,0 +1,489 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020-2021 Intel Corporation <www.intel.com>
+ */
+
+#include <common.h>
+#include <asm/arch/clock_manager.h>
+#include <asm/global_data.h>
+#include <asm/io.h>
+#include <clk-uclass.h>
+#include <dm.h>
+#include <dm/lists.h>
+#include <dm/util.h>
+#include <dt-bindings/clock/n5x-clock.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct socfpga_clk_plat {
+ void __iomem *regs;
+};
+
+/*
+ * function to write the bypass register which requires a poll of the
+ * busy bit
+ */
+static void clk_write_bypass_mainpll(struct socfpga_clk_plat *plat, u32 val)
+{
+ CM_REG_WRITEL(plat, val, CLKMGR_MAINPLL_BYPASS);
+ cm_wait_for_fsm();
+}
+
+static void clk_write_bypass_perpll(struct socfpga_clk_plat *plat, u32 val)
+{
+ CM_REG_WRITEL(plat, val, CLKMGR_PERPLL_BYPASS);
+ cm_wait_for_fsm();
+}
+
+/* function to write the ctrl register which requires a poll of the busy bit */
+static void clk_write_ctrl(struct socfpga_clk_plat *plat, u32 val)
+{
+ CM_REG_WRITEL(plat, val, CLKMGR_CTRL);
+ cm_wait_for_fsm();
+}
+
+/*
+ * Setup clocks while making no assumptions about previous state of the clocks.
+ */
+static void clk_basic_init(struct udevice *dev,
+ const struct cm_config * const cfg)
+{
+ struct socfpga_clk_plat *plat = dev_get_plat(dev);
+
+ if (!cfg)
+ return;
+
+#if IS_ENABLED(CONFIG_SPL_BUILD)
+ /* Always force clock manager into boot mode before any configuration */
+ clk_write_ctrl(plat,
+ CM_REG_READL(plat, CLKMGR_CTRL) | CLKMGR_CTRL_BOOTMODE);
+#else
+ /* Skip clock configuration in SSBL if it's not in boot mode */
+ if (!(CM_REG_READL(plat, CLKMGR_CTRL) & CLKMGR_CTRL_BOOTMODE))
+ return;
+#endif
+
+ /* Put both PLLs in bypass */
+ clk_write_bypass_mainpll(plat, CLKMGR_BYPASS_MAINPLL_ALL);
+ clk_write_bypass_perpll(plat, CLKMGR_BYPASS_PERPLL_ALL);
+
+ /* Put both PLLs in Reset */
+ CM_REG_SETBITS(plat, CLKMGR_MAINPLL_PLLCTRL,
+ CLKMGR_PLLCTRL_BYPASS_MASK);
+ CM_REG_SETBITS(plat, CLKMGR_PERPLL_PLLCTRL,
+ CLKMGR_PLLCTRL_BYPASS_MASK);
+
+ /* setup main PLL */
+ CM_REG_WRITEL(plat, cfg->main_pll_pllglob, CLKMGR_MAINPLL_PLLGLOB);
+ CM_REG_WRITEL(plat, cfg->main_pll_plldiv, CLKMGR_MAINPLL_PLLDIV);
+ CM_REG_WRITEL(plat, cfg->main_pll_plloutdiv, CLKMGR_MAINPLL_PLLOUTDIV);
+ CM_REG_WRITEL(plat, cfg->main_pll_mpuclk, CLKMGR_MAINPLL_MPUCLK);
+ CM_REG_WRITEL(plat, cfg->main_pll_nocclk, CLKMGR_MAINPLL_NOCCLK);
+ CM_REG_WRITEL(plat, cfg->main_pll_nocdiv, CLKMGR_MAINPLL_NOCDIV);
+
+ /* setup peripheral */
+ CM_REG_WRITEL(plat, cfg->per_pll_pllglob, CLKMGR_PERPLL_PLLGLOB);
+ CM_REG_WRITEL(plat, cfg->per_pll_plldiv, CLKMGR_PERPLL_PLLDIV);
+ CM_REG_WRITEL(plat, cfg->per_pll_plloutdiv, CLKMGR_PERPLL_PLLOUTDIV);
+ CM_REG_WRITEL(plat, cfg->per_pll_emacctl, CLKMGR_PERPLL_EMACCTL);
+ CM_REG_WRITEL(plat, cfg->per_pll_gpiodiv, CLKMGR_PERPLL_GPIODIV);
+
+ /* Take both PLL out of reset and power up */
+ CM_REG_CLRBITS(plat, CLKMGR_MAINPLL_PLLCTRL,
+ CLKMGR_PLLCTRL_BYPASS_MASK);
+ CM_REG_CLRBITS(plat, CLKMGR_PERPLL_PLLCTRL,
+ CLKMGR_PLLCTRL_BYPASS_MASK);
+
+ cm_wait_for_lock(CLKMGR_STAT_ALLPLL_LOCKED_MASK);
+
+ CM_REG_WRITEL(plat, cfg->alt_emacactr, CLKMGR_ALTR_EMACACTR);
+ CM_REG_WRITEL(plat, cfg->alt_emacbctr, CLKMGR_ALTR_EMACBCTR);
+ CM_REG_WRITEL(plat, cfg->alt_emacptpctr, CLKMGR_ALTR_EMACPTPCTR);
+ CM_REG_WRITEL(plat, cfg->alt_gpiodbctr, CLKMGR_ALTR_GPIODBCTR);
+ CM_REG_WRITEL(plat, cfg->alt_sdmmcctr, CLKMGR_ALTR_SDMMCCTR);
+ CM_REG_WRITEL(plat, cfg->alt_s2fuser0ctr, CLKMGR_ALTR_S2FUSER0CTR);
+ CM_REG_WRITEL(plat, cfg->alt_s2fuser1ctr, CLKMGR_ALTR_S2FUSER1CTR);
+ CM_REG_WRITEL(plat, cfg->alt_psirefctr, CLKMGR_ALTR_PSIREFCTR);
+
+ /* Configure ping pong counters in altera group */
+ CM_REG_WRITEL(plat, CLKMGR_LOSTLOCK_SET_MASK, CLKMGR_MAINPLL_LOSTLOCK);
+ CM_REG_WRITEL(plat, CLKMGR_LOSTLOCK_SET_MASK, CLKMGR_PERPLL_LOSTLOCK);
+
+ CM_REG_WRITEL(plat, CM_REG_READL(plat, CLKMGR_MAINPLL_PLLGLOB) |
+ CLKMGR_PLLGLOB_CLR_LOSTLOCK_BYPASS_MASK,
+ CLKMGR_MAINPLL_PLLGLOB);
+ CM_REG_WRITEL(plat, CM_REG_READL(plat, CLKMGR_PERPLL_PLLGLOB) |
+ CLKMGR_PLLGLOB_CLR_LOSTLOCK_BYPASS_MASK,
+ CLKMGR_PERPLL_PLLGLOB);
+
+ /* Take all PLLs out of bypass */
+ clk_write_bypass_mainpll(plat, 0);
+ clk_write_bypass_perpll(plat, 0);
+
+ /* Clear the loss of lock bits (write 1 to clear) */
+ CM_REG_CLRBITS(plat, CLKMGR_INTRCLR,
+ CLKMGR_INTER_PERPLLLOST_MASK |
+ CLKMGR_INTER_MAINPLLLOST_MASK);
+
+ /* Take all ping pong counters out of reset */
+ CM_REG_CLRBITS(plat, CLKMGR_ALTR_EXTCNTRST,
+ CLKMGR_ALT_EXTCNTRST_ALLCNTRST_MASK);
+
+ /* Out of boot mode */
+ clk_write_ctrl(plat,
+ CM_REG_READL(plat, CLKMGR_CTRL) & ~CLKMGR_CTRL_BOOTMODE);
+}
+
+static u32 clk_get_5_1_clk_src(struct socfpga_clk_plat *plat, u32 reg)
+{
+ u32 clksrc = CM_REG_READL(plat, reg);
+
+ return (clksrc & CLKMGR_CLKSRC_MASK) >> CLKMGR_CLKSRC_OFFSET;
+}
+
+static u64 clk_get_pll_output_hz(struct socfpga_clk_plat *plat,
+ u32 pllglob_reg, u32 plldiv_reg)
+{
+ u64 clock = 0;
+ u32 clklsrc, divf, divr, divq, power = 1;
+
+ /* Get input clock frequency */
+ clklsrc = (CM_REG_READL(plat, pllglob_reg) &
+ CLKMGR_PLLGLOB_VCO_PSRC_MASK) >>
+ CLKMGR_PLLGLOB_VCO_PSRC_OFFSET;
+
+ switch (clklsrc) {
+ case CLKMGR_VCO_PSRC_EOSC1:
+ clock = cm_get_osc_clk_hz();
+ break;
+ case CLKMGR_VCO_PSRC_INTOSC:
+ clock = cm_get_intosc_clk_hz();
+ break;
+ case CLKMGR_VCO_PSRC_F2S:
+ clock = cm_get_fpga_clk_hz();
+ break;
+ }
+
+ /* Calculate pll out clock frequency */
+ divf = (CM_REG_READL(plat, plldiv_reg) &
+ CLKMGR_PLLDIV_FDIV_MASK) >>
+ CLKMGR_PLLDIV_FDIV_OFFSET;
+
+ divr = (CM_REG_READL(plat, plldiv_reg) &
+ CLKMGR_PLLDIV_REFCLKDIV_MASK) >>
+ CLKMGR_PLLDIV_REFCLKDIV_OFFSET;
+
+ divq = (CM_REG_READL(plat, plldiv_reg) &
+ CLKMGR_PLLDIV_OUTDIV_QDIV_MASK) >>
+ CLKMGR_PLLDIV_OUTDIV_QDIV_OFFSET;
+
+ while (divq) {
+ power *= 2;
+ divq--;
+ }
+
+ return ((clock * 2 * (divf + 1)) / ((divr + 1) * power));
+}
+
+static u64 clk_get_clksrc_hz(struct socfpga_clk_plat *plat, u32 clksrc_reg,
+ u32 main_div, u32 per_div)
+{
+ u64 clock = 0;
+ u32 clklsrc = clk_get_5_1_clk_src(plat, clksrc_reg);
+
+ switch (clklsrc) {
+ case CLKMGR_CLKSRC_MAIN:
+ clock = clk_get_pll_output_hz(plat,
+ CLKMGR_MAINPLL_PLLGLOB,
+ CLKMGR_MAINPLL_PLLDIV);
+ clock /= 1 + main_div;
+ break;
+
+ case CLKMGR_CLKSRC_PER:
+ clock = clk_get_pll_output_hz(plat,
+ CLKMGR_PERPLL_PLLGLOB,
+ CLKMGR_PERPLL_PLLDIV);
+ clock /= 1 + per_div;
+ break;
+
+ case CLKMGR_CLKSRC_OSC1:
+ clock = cm_get_osc_clk_hz();
+ break;
+
+ case CLKMGR_CLKSRC_INTOSC:
+ clock = cm_get_intosc_clk_hz();
+ break;
+
+ case CLKMGR_CLKSRC_FPGA:
+ clock = cm_get_fpga_clk_hz();
+ break;
+ default:
+ return 0;
+ }
+
+ return clock;
+}
+
+static u64 clk_get_mpu_clk_hz(struct socfpga_clk_plat *plat)
+{
+ u32 mainpll_c0cnt = (CM_REG_READL(plat, CLKMGR_MAINPLL_PLLOUTDIV) &
+ CLKMGR_PLLOUTDIV_C0CNT_MASK) >>
+ CLKMGR_PLLOUTDIV_C0CNT_OFFSET;
+
+ u32 perpll_c0cnt = (CM_REG_READL(plat, CLKMGR_PERPLL_PLLOUTDIV) &
+ CLKMGR_PLLOUTDIV_C0CNT_MASK) >>
+ CLKMGR_PLLOUTDIV_C0CNT_OFFSET;
+
+ u64 clock = clk_get_clksrc_hz(plat, CLKMGR_MAINPLL_MPUCLK,
+ mainpll_c0cnt, perpll_c0cnt);
+
+ clock /= 1 + (CM_REG_READL(plat, CLKMGR_MAINPLL_MPUCLK) &
+ CLKMGR_CLKCNT_MSK);
+
+ return clock;
+}
+
+static u32 clk_get_l3_main_clk_hz(struct socfpga_clk_plat *plat)
+{
+ u32 mainpll_c1cnt = (CM_REG_READL(plat, CLKMGR_MAINPLL_PLLOUTDIV) &
+ CLKMGR_PLLOUTDIV_C1CNT_MASK) >>
+ CLKMGR_PLLOUTDIV_C1CNT_OFFSET;
+
+ u32 perpll_c1cnt = (CM_REG_READL(plat, CLKMGR_PERPLL_PLLOUTDIV) &
+ CLKMGR_PLLOUTDIV_C1CNT_MASK) >>
+ CLKMGR_PLLOUTDIV_C1CNT_OFFSET;
+
+ return clk_get_clksrc_hz(plat, CLKMGR_MAINPLL_NOCCLK,
+ mainpll_c1cnt, perpll_c1cnt);
+}
+
+static u32 clk_get_l4_main_clk_hz(struct socfpga_clk_plat *plat)
+{
+ u64 clock = clk_get_l3_main_clk_hz(plat);
+
+ clock /= BIT((CM_REG_READL(plat, CLKMGR_MAINPLL_NOCDIV) >>
+ CLKMGR_NOCDIV_L4MAIN_OFFSET) &
+ CLKMGR_NOCDIV_DIVIDER_MASK);
+
+ return clock;
+}
+
+static u32 clk_get_sdmmc_clk_hz(struct socfpga_clk_plat *plat)
+{
+ u32 mainpll_c3cnt = (CM_REG_READL(plat, CLKMGR_MAINPLL_PLLOUTDIV) &
+ CLKMGR_PLLOUTDIV_C3CNT_MASK) >>
+ CLKMGR_PLLOUTDIV_C3CNT_OFFSET;
+
+ u32 perpll_c3cnt = (CM_REG_READL(plat, CLKMGR_PERPLL_PLLOUTDIV) &
+ CLKMGR_PLLOUTDIV_C3CNT_MASK) >>
+ CLKMGR_PLLOUTDIV_C3CNT_OFFSET;
+
+ u64 clock = clk_get_clksrc_hz(plat, CLKMGR_ALTR_SDMMCCTR,
+ mainpll_c3cnt, perpll_c3cnt);
+
+ clock /= 1 + (CM_REG_READL(plat, CLKMGR_ALTR_SDMMCCTR) &
+ CLKMGR_CLKCNT_MSK);
+
+ return clock / 4;
+}
+
+static u32 clk_get_l4_sp_clk_hz(struct socfpga_clk_plat *plat)
+{
+ u64 clock = clk_get_l3_main_clk_hz(plat);
+
+ clock /= BIT((CM_REG_READL(plat, CLKMGR_MAINPLL_NOCDIV) >>
+ CLKMGR_NOCDIV_L4SPCLK_OFFSET) &
+ CLKMGR_NOCDIV_DIVIDER_MASK);
+
+ return clock;
+}
+
+static u32 clk_get_l4_mp_clk_hz(struct socfpga_clk_plat *plat)
+{
+ u64 clock = clk_get_l3_main_clk_hz(plat);
+
+ clock /= BIT((CM_REG_READL(plat, CLKMGR_MAINPLL_NOCDIV) >>
+ CLKMGR_NOCDIV_L4MPCLK_OFFSET) &
+ CLKMGR_NOCDIV_DIVIDER_MASK);
+
+ return clock;
+}
+
+static u32 clk_get_l4_sys_free_clk_hz(struct socfpga_clk_plat *plat)
+{
+ if (CM_REG_READL(plat, CLKMGR_STAT) & CLKMGR_STAT_BOOTMODE)
+ return clk_get_l3_main_clk_hz(plat) / 2;
+
+ return clk_get_l3_main_clk_hz(plat) / 4;
+}
+
+static u32 clk_get_emac_clk_hz(struct socfpga_clk_plat *plat, u32 emac_id)
+{
+ bool emacsel_a;
+ u32 ctl;
+ u32 ctr_reg;
+ u32 clock;
+ u32 div;
+ u32 reg;
+
+ /* Get EMAC clock source */
+ ctl = CM_REG_READL(plat, CLKMGR_PERPLL_EMACCTL);
+ if (emac_id == N5X_EMAC0_CLK)
+ ctl = (ctl >> CLKMGR_PERPLLGRP_EMACCTL_EMAC0SELB_OFFSET) &
+ CLKMGR_PERPLLGRP_EMACCTL_EMAC0SELB_MASK;
+ else if (emac_id == N5X_EMAC1_CLK)
+ ctl = (ctl >> CLKMGR_PERPLLGRP_EMACCTL_EMAC1SELB_OFFSET) &
+ CLKMGR_PERPLLGRP_EMACCTL_EMAC1SELB_MASK;
+ else if (emac_id == N5X_EMAC2_CLK)
+ ctl = (ctl >> CLKMGR_PERPLLGRP_EMACCTL_EMAC2SELB_OFFSET) &
+ CLKMGR_PERPLLGRP_EMACCTL_EMAC2SELB_MASK;
+ else
+ return 0;
+
+ if (ctl) {
+ /* EMAC B source */
+ emacsel_a = false;
+ ctr_reg = CLKMGR_ALTR_EMACBCTR;
+ } else {
+ /* EMAC A source */
+ emacsel_a = true;
+ ctr_reg = CLKMGR_ALTR_EMACACTR;
+ }
+
+ reg = CM_REG_READL(plat, ctr_reg);
+ clock = (reg & CLKMGR_ALT_EMACCTR_SRC_MASK)
+ >> CLKMGR_ALT_EMACCTR_SRC_OFFSET;
+ div = (reg & CLKMGR_ALT_EMACCTR_CNT_MASK)
+ >> CLKMGR_ALT_EMACCTR_CNT_OFFSET;
+
+ switch (clock) {
+ case CLKMGR_CLKSRC_MAIN:
+ clock = clk_get_pll_output_hz(plat,
+ CLKMGR_MAINPLL_PLLGLOB,
+ CLKMGR_MAINPLL_PLLDIV);
+
+ if (emacsel_a) {
+ clock /= 1 + ((CM_REG_READL(plat,
+ CLKMGR_MAINPLL_PLLOUTDIV) &
+ CLKMGR_PLLOUTDIV_C2CNT_MASK) >>
+ CLKMGR_PLLOUTDIV_C2CNT_OFFSET);
+ } else {
+ clock /= 1 + ((CM_REG_READL(plat,
+ CLKMGR_MAINPLL_PLLOUTDIV) &
+ CLKMGR_PLLOUTDIV_C3CNT_MASK) >>
+ CLKMGR_PLLOUTDIV_C3CNT_OFFSET);
+ }
+ break;
+
+ case CLKMGR_CLKSRC_PER:
+ clock = clk_get_pll_output_hz(plat,
+ CLKMGR_PERPLL_PLLGLOB,
+ CLKMGR_PERPLL_PLLDIV);
+ if (emacsel_a) {
+ clock /= 1 + ((CM_REG_READL(plat,
+ CLKMGR_PERPLL_PLLOUTDIV) &
+ CLKMGR_PLLOUTDIV_C2CNT_MASK) >>
+ CLKMGR_PLLOUTDIV_C2CNT_OFFSET);
+ } else {
+ clock /= 1 + ((CM_REG_READL(plat,
+ CLKMGR_PERPLL_PLLOUTDIV) &
+ CLKMGR_PLLOUTDIV_C3CNT_MASK >>
+ CLKMGR_PLLOUTDIV_C3CNT_OFFSET));
+ }
+ break;
+
+ case CLKMGR_CLKSRC_OSC1:
+ clock = cm_get_osc_clk_hz();
+ break;
+
+ case CLKMGR_CLKSRC_INTOSC:
+ clock = cm_get_intosc_clk_hz();
+ break;
+
+ case CLKMGR_CLKSRC_FPGA:
+ clock = cm_get_fpga_clk_hz();
+ break;
+ }
+
+ clock /= 1 + div;
+
+ return clock;
+}
+
+static ulong socfpga_clk_get_rate(struct clk *clk)
+{
+ struct socfpga_clk_plat *plat = dev_get_plat(clk->dev);
+
+ switch (clk->id) {
+ case N5X_MPU_CLK:
+ return clk_get_mpu_clk_hz(plat);
+ case N5X_L4_MAIN_CLK:
+ return clk_get_l4_main_clk_hz(plat);
+ case N5X_L4_SYS_FREE_CLK:
+ return clk_get_l4_sys_free_clk_hz(plat);
+ case N5X_L4_MP_CLK:
+ return clk_get_l4_mp_clk_hz(plat);
+ case N5X_L4_SP_CLK:
+ return clk_get_l4_sp_clk_hz(plat);
+ case N5X_SDMMC_CLK:
+ return clk_get_sdmmc_clk_hz(plat);
+ case N5X_EMAC0_CLK:
+ case N5X_EMAC1_CLK:
+ case N5X_EMAC2_CLK:
+ return clk_get_emac_clk_hz(plat, clk->id);
+ case N5X_USB_CLK:
+ case N5X_NAND_X_CLK:
+ return clk_get_l4_mp_clk_hz(plat);
+ case N5X_NAND_CLK:
+ return clk_get_l4_mp_clk_hz(plat) / 4;
+ default:
+ return -ENXIO;
+ }
+}
+
+static int socfpga_clk_enable(struct clk *clk)
+{
+ return 0;
+}
+
+static int socfpga_clk_probe(struct udevice *dev)
+{
+ const struct cm_config *cm_default_cfg = cm_get_default_config();
+
+ clk_basic_init(dev, cm_default_cfg);
+
+ return 0;
+}
+
+static int socfpga_clk_of_to_plat(struct udevice *dev)
+{
+ struct socfpga_clk_plat *plat = dev_get_plat(dev);
+ fdt_addr_t addr;
+
+ addr = devfdt_get_addr(dev);
+ if (addr == FDT_ADDR_T_NONE)
+ return -EINVAL;
+ plat->regs = (void __iomem *)addr;
+
+ return 0;
+}
+
+static struct clk_ops socfpga_clk_ops = {
+ .enable = socfpga_clk_enable,
+ .get_rate = socfpga_clk_get_rate,
+};
+
+static const struct udevice_id socfpga_clk_match[] = {
+ { .compatible = "intel,n5x-clkmgr" },
+ {}
+};
+
+U_BOOT_DRIVER(socfpga_n5x_clk) = {
+ .name = "clk-n5x",
+ .id = UCLASS_CLK,
+ .of_match = socfpga_clk_match,
+ .ops = &socfpga_clk_ops,
+ .probe = socfpga_clk_probe,
+ .of_to_plat = socfpga_clk_of_to_plat,
+ .plat_auto = sizeof(struct socfpga_clk_plat),
+};
diff --git a/drivers/clk/altera/clk-n5x.h b/drivers/clk/altera/clk-n5x.h
new file mode 100644
index 0000000000..58672d9102
--- /dev/null
+++ b/drivers/clk/altera/clk-n5x.h
@@ -0,0 +1,217 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020-2021 Intel Corporation <www.intel.com>
+ */
+
+#ifndef _CLK_N5X_
+#define _CLK_N5X_
+
+#ifndef __ASSEMBLY__
+#include <linux/bitops.h>
+#endif
+
+#define CM_REG_READL(plat, reg) \
+ readl((plat)->regs + (reg))
+
+#define CM_REG_WRITEL(plat, data, reg) \
+ writel(data, (plat)->regs + (reg))
+
+#define CM_REG_CLRBITS(plat, reg, clear) \
+ clrbits_le32((plat)->regs + (reg), (clear))
+
+#define CM_REG_SETBITS(plat, reg, set) \
+ setbits_le32((plat)->regs + (reg), (set))
+
+struct cm_config {
+ /* main group */
+ u32 main_pll_mpuclk;
+ u32 main_pll_nocclk;
+ u32 main_pll_nocdiv;
+ u32 main_pll_pllglob;
+ u32 main_pll_plldiv;
+ u32 main_pll_plloutdiv;
+ u32 spare_1[4];
+
+ /* peripheral group */
+ u32 per_pll_emacctl;
+ u32 per_pll_gpiodiv;
+ u32 per_pll_pllglob;
+ u32 per_pll_plldiv;
+ u32 per_pll_plloutdiv;
+ u32 spare_2[4];
+
+ /* altera group */
+ u32 alt_emacactr;
+ u32 alt_emacbctr;
+ u32 alt_emacptpctr;
+ u32 alt_gpiodbctr;
+ u32 alt_sdmmcctr;
+ u32 alt_s2fuser0ctr;
+ u32 alt_s2fuser1ctr;
+ u32 alt_psirefctr;
+
+ /* incoming clock */
+ u32 hps_osc_clk_hz;
+ u32 fpga_clk_hz;
+ u32 spare_3[3];
+
+ /* memory clock group */
+ u32 mem_memdiv;
+ u32 mem_pllglob;
+ u32 mem_plldiv;
+ u32 mem_plloutdiv;
+ u32 spare_4[4];
+};
+
+/* Clock Manager registers */
+#define CLKMGR_CTRL 0
+#define CLKMGR_STAT 4
+#define CLKMGR_TESTIOCTRL 8
+#define CLKMGR_INTRGEN 0x0c
+#define CLKMGR_INTRMSK 0x10
+#define CLKMGR_INTRCLR 0x14
+#define CLKMGR_INTRSTS 0x18
+#define CLKMGR_INTRSTK 0x1c
+#define CLKMGR_INTRRAW 0x20
+
+/* Clock Manager Main PPL group registers */
+#define CLKMGR_MAINPLL_EN 0x24
+#define CLKMGR_MAINPLL_ENS 0x28
+#define CLKMGR_MAINPLL_ENR 0x2c
+#define CLKMGR_MAINPLL_BYPASS 0x30
+#define CLKMGR_MAINPLL_BYPASSS 0x34
+#define CLKMGR_MAINPLL_BYPASSR 0x38
+#define CLKMGR_MAINPLL_MPUCLK 0x3c
+#define CLKMGR_MAINPLL_NOCCLK 0x40
+#define CLKMGR_MAINPLL_NOCDIV 0x44
+#define CLKMGR_MAINPLL_PLLGLOB 0x48
+#define CLKMGR_MAINPLL_PLLCTRL 0x4c
+#define CLKMGR_MAINPLL_PLLDIV 0x50
+#define CLKMGR_MAINPLL_PLLOUTDIV 0x54
+#define CLKMGR_MAINPLL_LOSTLOCK 0x58
+
+/* Clock Manager Peripheral PPL group registers */
+#define CLKMGR_PERPLL_EN 0x7c
+#define CLKMGR_PERPLL_ENS 0x80
+#define CLKMGR_PERPLL_ENR 0x84
+#define CLKMGR_PERPLL_BYPASS 0x88
+#define CLKMGR_PERPLL_BYPASSS 0x8c
+#define CLKMGR_PERPLL_BYPASSR 0x90
+#define CLKMGR_PERPLL_EMACCTL 0x94
+#define CLKMGR_PERPLL_GPIODIV 0x98
+#define CLKMGR_PERPLL_PLLGLOB 0x9c
+#define CLKMGR_PERPLL_PLLCTRL 0xa0
+#define CLKMGR_PERPLL_PLLDIV 0xa4
+#define CLKMGR_PERPLL_PLLOUTDIV 0xa8
+#define CLKMGR_PERPLL_LOSTLOCK 0xac
+
+/* Clock Manager Altera group registers */
+#define CLKMGR_ALTR_EMACACTR 0xd4
+#define CLKMGR_ALTR_EMACBCTR 0xd8
+#define CLKMGR_ALTR_EMACPTPCTR 0xdc
+#define CLKMGR_ALTR_GPIODBCTR 0xe0
+#define CLKMGR_ALTR_SDMMCCTR 0xe4
+#define CLKMGR_ALTR_S2FUSER0CTR 0xe8
+#define CLKMGR_ALTR_S2FUSER1CTR 0xec
+#define CLKMGR_ALTR_PSIREFCTR 0xf0
+#define CLKMGR_ALTR_EXTCNTRST 0xf4
+
+#define CLKMGR_CTRL_BOOTMODE BIT(0)
+
+#define CLKMGR_STAT_BUSY BIT(0)
+#define CLKMGR_STAT_MAINPLL_LOCKED BIT(8)
+#define CLKMGR_STAT_MAIN_TRANS BIT(9)
+#define CLKMGR_STAT_PERPLL_LOCKED BIT(16)
+#define CLKMGR_STAT_PERF_TRANS BIT(17)
+#define CLKMGR_STAT_BOOTMODE BIT(24)
+#define CLKMGR_STAT_BOOTCLKSRC BIT(25)
+
+#define CLKMGR_STAT_ALLPLL_LOCKED_MASK \
+ (CLKMGR_STAT_MAINPLL_LOCKED | CLKMGR_STAT_PERPLL_LOCKED)
+
+#define CLKMGR_INTER_MAINPLLLOCKED_MASK 0x00000001
+#define CLKMGR_INTER_PERPLLLOCKED_MASK 0x00000002
+#define CLKMGR_INTER_MAINPLLLOST_MASK 0x00000004
+#define CLKMGR_INTER_PERPLLLOST_MASK 0x00000008
+
+#define CLKMGR_CLKSRC_MASK GENMASK(18, 16)
+#define CLKMGR_CLKSRC_OFFSET 16
+#define CLKMGR_CLKSRC_MAIN 0
+#define CLKMGR_CLKSRC_PER 1
+#define CLKMGR_CLKSRC_OSC1 2
+#define CLKMGR_CLKSRC_INTOSC 3
+#define CLKMGR_CLKSRC_FPGA 4
+#define CLKMGR_CLKCNT_MSK GENMASK(10, 0)
+
+#define CLKMGR_BYPASS_MAINPLL_ALL 0x7
+#define CLKMGR_BYPASS_PERPLL_ALL 0x7f
+
+#define CLKMGR_NOCDIV_L4MAIN_OFFSET 0
+#define CLKMGR_NOCDIV_L4MPCLK_OFFSET 8
+#define CLKMGR_NOCDIV_L4SPCLK_OFFSET 16
+#define CLKMGR_NOCDIV_CSATCLK_OFFSET 24
+#define CLKMGR_NOCDIV_CSTRACECLK_OFFSET 26
+#define CLKMGR_NOCDIV_CSPDBGCLK_OFFSET 28
+#define CLKMGR_NOCDIV_DIVIDER_MASK 0x3
+
+#define CLKMGR_PLLGLOB_VCO_PSRC_MASK GENMASK(17, 16)
+#define CLKMGR_PLLGLOB_VCO_PSRC_OFFSET 16
+#define CLKMGR_PLLGLOB_LOSTLOCK_BYPASS_EN_MASK BIT(28)
+#define CLKMGR_PLLGLOB_CLR_LOSTLOCK_BYPASS_MASK BIT(29)
+
+#define CLKMGR_VCO_PSRC_EOSC1 0
+#define CLKMGR_VCO_PSRC_INTOSC 1
+#define CLKMGR_VCO_PSRC_F2S 2
+
+#define CLKMGR_PLLCTRL_BYPASS_MASK BIT(0)
+#define CLKMGR_PLLCTRL_RST_N_MASK BIT(1)
+
+#define CLKMGR_PLLDIV_REFCLKDIV_MASK GENMASK(5, 0)
+#define CLKMGR_PLLDIV_FDIV_MASK GENMASK(16, 8)
+#define CLKMGR_PLLDIV_OUTDIV_QDIV_MASK GENMASK(26, 24)
+#define CLKMGR_PLLDIV_RANGE_MASK GENMASK(30, 28)
+
+#define CLKMGR_PLLDIV_REFCLKDIV_OFFSET 0
+#define CLKMGR_PLLDIV_FDIV_OFFSET 8
+#define CLKMGR_PLLDIV_OUTDIV_QDIV_OFFSET 24
+#define CLKMGR_PLLDIV_RANGE_OFFSET 28
+
+#define CLKMGR_PLLOUTDIV_C0CNT_MASK GENMASK(4, 0)
+#define CLKMGR_PLLOUTDIV_C1CNT_MASK GENMASK(12, 8)
+#define CLKMGR_PLLOUTDIV_C2CNT_MASK GENMASK(20, 16)
+#define CLKMGR_PLLOUTDIV_C3CNT_MASK GENMASK(28, 24)
+
+#define CLKMGR_PLLOUTDIV_C0CNT_OFFSET 0
+#define CLKMGR_PLLOUTDIV_C1CNT_OFFSET 8
+#define CLKMGR_PLLOUTDIV_C2CNT_OFFSET 16
+#define CLKMGR_PLLOUTDIV_C3CNT_OFFSET 24
+
+#define CLKMGR_PLLCX_EN_SET_MSK BIT(27)
+#define CLKMGR_PLLCX_MUTE_SET_MSK BIT(28)
+
+#define CLKMGR_VCOCALIB_MSCNT_MASK GENMASK(23, 16)
+#define CLKMGR_VCOCALIB_MSCNT_OFFSET 16
+#define CLKMGR_VCOCALIB_HSCNT_MASK GENMASK(9, 0)
+#define CLKMGR_VCOCALIB_MSCNT_CONST 100
+#define CLKMGR_VCOCALIB_HSCNT_CONST 4
+
+#define CLKMGR_PLLM_MDIV_MASK GENMASK(9, 0)
+
+#define CLKMGR_LOSTLOCK_SET_MASK BIT(0)
+
+#define CLKMGR_PERPLLGRP_EN_SDMMCCLK_MASK BIT(5)
+#define CLKMGR_PERPLLGRP_EMACCTL_EMAC0SELB_OFFSET 26
+#define CLKMGR_PERPLLGRP_EMACCTL_EMAC0SELB_MASK BIT(26)
+#define CLKMGR_PERPLLGRP_EMACCTL_EMAC1SELB_OFFSET 27
+#define CLKMGR_PERPLLGRP_EMACCTL_EMAC1SELB_MASK BIT(27)
+#define CLKMGR_PERPLLGRP_EMACCTL_EMAC2SELB_OFFSET 28
+#define CLKMGR_PERPLLGRP_EMACCTL_EMAC2SELB_MASK BIT(28)
+
+#define CLKMGR_ALT_EMACCTR_SRC_OFFSET 16
+#define CLKMGR_ALT_EMACCTR_SRC_MASK GENMASK(18, 16)
+#define CLKMGR_ALT_EMACCTR_CNT_OFFSET 0
+#define CLKMGR_ALT_EMACCTR_CNT_MASK GENMASK(10, 0)
+
+#define CLKMGR_ALT_EXTCNTRST_ALLCNTRST_MASK GENMASK(15, 0)
+
+#endif /* _CLK_N5X_ */
diff --git a/include/dt-bindings/clock/n5x-clock.h b/include/dt-bindings/clock/n5x-clock.h
new file mode 100644
index 0000000000..a56e4dba77
--- /dev/null
+++ b/include/dt-bindings/clock/n5x-clock.h
@@ -0,0 +1,71 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020-2021, Intel Corporation
+ */
+
+#ifndef __N5X_CLOCK_H
+#define __N5X_CLOCK_H
+
+/* fixed rate clocks */
+#define N5X_OSC1 0
+#define N5X_CB_INTOSC_HS_DIV2_CLK 1
+#define N5X_CB_INTOSC_LS_CLK 2
+#define N5X_L4_SYS_FREE_CLK 3
+#define N5X_F2S_FREE_CLK 4
+
+/* PLL clocks */
+#define N5X_MAIN_PLL_CLK 5
+#define N5X_MAIN_PLL_C0_CLK 6
+#define N5X_MAIN_PLL_C1_CLK 7
+#define N5X_MAIN_PLL_C2_CLK 8
+#define N5X_MAIN_PLL_C3_CLK 9
+#define N5X_PERIPH_PLL_CLK 10
+#define N5X_PERIPH_PLL_C0_CLK 11
+#define N5X_PERIPH_PLL_C1_CLK 12
+#define N5X_PERIPH_PLL_C2_CLK 13
+#define N5X_PERIPH_PLL_C3_CLK 14
+#define N5X_MPU_FREE_CLK 15
+#define N5X_MPU_CCU_CLK 16
+#define N5X_BOOT_CLK 17
+
+/* fixed factor clocks */
+#define N5X_L3_MAIN_FREE_CLK 18
+#define N5X_NOC_FREE_CLK 19
+#define N5X_S2F_USR0_CLK 20
+#define N5X_NOC_CLK 21
+#define N5X_EMAC_A_FREE_CLK 22
+#define N5X_EMAC_B_FREE_CLK 23
+#define N5X_EMAC_PTP_FREE_CLK 24
+#define N5X_GPIO_DB_FREE_CLK 25
+#define N5X_SDMMC_FREE_CLK 26
+#define N5X_S2F_USER0_FREE_CLK 27
+#define N5X_S2F_USER1_FREE_CLK 28
+#define N5X_PSI_REF_FREE_CLK 29
+
+/* Gate clocks */
+#define N5X_MPU_CLK 30
+#define N5X_MPU_PERIPH_CLK 31
+#define N5X_L4_MAIN_CLK 32
+#define N5X_L4_MP_CLK 33
+#define N5X_L4_SP_CLK 34
+#define N5X_CS_AT_CLK 35
+#define N5X_CS_TRACE_CLK 36
+#define N5X_CS_PDBG_CLK 37
+#define N5X_CS_TIMER_CLK 38
+#define N5X_S2F_USER0_CLK 39
+#define N5X_EMAC0_CLK 40
+#define N5X_EMAC1_CLK 41
+#define N5X_EMAC2_CLK 42
+#define N5X_EMAC_PTP_CLK 43
+#define N5X_GPIO_DB_CLK 44
+#define N5X_NAND_CLK 45
+#define N5X_PSI_REF_CLK 46
+#define N5X_S2F_USER1_CLK 47
+#define N5X_SDMMC_CLK 48
+#define N5X_SPI_M_CLK 49
+#define N5X_USB_CLK 50
+#define N5X_NAND_X_CLK 51
+#define N5X_NAND_ECC_CLK 52
+#define N5X_NUM_CLKS 53
+
+#endif /* __N5X_CLOCK_H */
--
2.13.0
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