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Diffstat (limited to 'arch/arm/cpu/tegra30-common/clock.c')
-rw-r--r--arch/arm/cpu/tegra30-common/clock.c618
1 files changed, 618 insertions, 0 deletions
diff --git a/arch/arm/cpu/tegra30-common/clock.c b/arch/arm/cpu/tegra30-common/clock.c
new file mode 100644
index 000000000..a93f2c943
--- /dev/null
+++ b/arch/arm/cpu/tegra30-common/clock.c
@@ -0,0 +1,618 @@
+/*
+ * Copyright (c) 2010-2013, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Tegra30 Clock control functions */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/tegra.h>
+#include <asm/arch-tegra/clk_rst.h>
+#include <asm/arch-tegra/timer.h>
+#include <div64.h>
+#include <fdtdec.h>
+
+/*
+ * Clock types that we can use as a source. The Tegra30 has muxes for the
+ * peripheral clocks, and in most cases there are four options for the clock
+ * source. This gives us a clock 'type' and exploits what commonality exists
+ * in the device.
+ *
+ * Letters are obvious, except for T which means CLK_M, and S which means the
+ * clock derived from 32KHz. Beware that CLK_M (also called OSC in the
+ * datasheet) and PLL_M are different things. The former is the basic
+ * clock supplied to the SOC from an external oscillator. The latter is the
+ * memory clock PLL.
+ *
+ * See definitions in clock_id in the header file.
+ */
+enum clock_type_id {
+ CLOCK_TYPE_AXPT, /* PLL_A, PLL_X, PLL_P, CLK_M */
+ CLOCK_TYPE_MCPA, /* and so on */
+ CLOCK_TYPE_MCPT,
+ CLOCK_TYPE_PCM,
+ CLOCK_TYPE_PCMT,
+ CLOCK_TYPE_PCMT16,
+ CLOCK_TYPE_PDCT,
+ CLOCK_TYPE_ACPT,
+ CLOCK_TYPE_ASPTE,
+ CLOCK_TYPE_PMDACD2T,
+ CLOCK_TYPE_PCST,
+
+ CLOCK_TYPE_COUNT,
+ CLOCK_TYPE_NONE = -1, /* invalid clock type */
+};
+
+enum {
+ CLOCK_MAX_MUX = 8 /* number of source options for each clock */
+};
+
+enum {
+ MASK_BITS_31_30 = 2, /* num of bits used to specify clock source */
+ MASK_BITS_31_29,
+ MASK_BITS_29_28,
+};
+
+/*
+ * Clock source mux for each clock type. This just converts our enum into
+ * a list of mux sources for use by the code.
+ *
+ * Note:
+ * The extra column in each clock source array is used to store the mask
+ * bits in its register for the source.
+ */
+#define CLK(x) CLOCK_ID_ ## x
+static enum clock_id clock_source[CLOCK_TYPE_COUNT][CLOCK_MAX_MUX+1] = {
+ { CLK(AUDIO), CLK(XCPU), CLK(PERIPH), CLK(OSC),
+ CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
+ MASK_BITS_31_30},
+ { CLK(MEMORY), CLK(CGENERAL), CLK(PERIPH), CLK(AUDIO),
+ CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
+ MASK_BITS_31_30},
+ { CLK(MEMORY), CLK(CGENERAL), CLK(PERIPH), CLK(OSC),
+ CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
+ MASK_BITS_31_30},
+ { CLK(PERIPH), CLK(CGENERAL), CLK(MEMORY), CLK(NONE),
+ CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
+ MASK_BITS_31_30},
+ { CLK(PERIPH), CLK(CGENERAL), CLK(MEMORY), CLK(OSC),
+ CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
+ MASK_BITS_31_30},
+ { CLK(PERIPH), CLK(CGENERAL), CLK(MEMORY), CLK(OSC),
+ CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
+ MASK_BITS_31_30},
+ { CLK(PERIPH), CLK(DISPLAY), CLK(CGENERAL), CLK(OSC),
+ CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
+ MASK_BITS_31_30},
+ { CLK(AUDIO), CLK(CGENERAL), CLK(PERIPH), CLK(OSC),
+ CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
+ MASK_BITS_31_30},
+ { CLK(AUDIO), CLK(SFROM32KHZ), CLK(PERIPH), CLK(OSC),
+ CLK(EPCI), CLK(NONE), CLK(NONE), CLK(NONE),
+ MASK_BITS_31_29},
+ { CLK(PERIPH), CLK(MEMORY), CLK(DISPLAY), CLK(AUDIO),
+ CLK(CGENERAL), CLK(DISPLAY2), CLK(OSC), CLK(NONE),
+ MASK_BITS_31_29},
+ { CLK(PERIPH), CLK(CGENERAL), CLK(SFROM32KHZ), CLK(OSC),
+ CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
+ MASK_BITS_29_28}
+};
+
+/*
+ * Clock type for each peripheral clock source. We put the name in each
+ * record just so it is easy to match things up
+ */
+#define TYPE(name, type) type
+static enum clock_type_id clock_periph_type[PERIPHC_COUNT] = {
+ /* 0x00 */
+ TYPE(PERIPHC_I2S1, CLOCK_TYPE_AXPT),
+ TYPE(PERIPHC_I2S2, CLOCK_TYPE_AXPT),
+ TYPE(PERIPHC_SPDIF_OUT, CLOCK_TYPE_AXPT),
+ TYPE(PERIPHC_SPDIF_IN, CLOCK_TYPE_PCM),
+ TYPE(PERIPHC_PWM, CLOCK_TYPE_PCST), /* only PWM uses b29:28 */
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+ TYPE(PERIPHC_SBC2, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_SBC3, CLOCK_TYPE_PCMT),
+
+ /* 0x08 */
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+ TYPE(PERIPHC_I2C1, CLOCK_TYPE_PCMT16),
+ TYPE(PERIPHC_DVC_I2C, CLOCK_TYPE_PCMT16),
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+ TYPE(PERIPHC_SBC1, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_DISP1, CLOCK_TYPE_PMDACD2T),
+ TYPE(PERIPHC_DISP2, CLOCK_TYPE_PMDACD2T),
+
+ /* 0x10 */
+ TYPE(PERIPHC_CVE, CLOCK_TYPE_PDCT),
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+ TYPE(PERIPHC_VI, CLOCK_TYPE_MCPA),
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+ TYPE(PERIPHC_SDMMC1, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_SDMMC2, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_G3D, CLOCK_TYPE_MCPA),
+ TYPE(PERIPHC_G2D, CLOCK_TYPE_MCPA),
+
+ /* 0x18 */
+ TYPE(PERIPHC_NDFLASH, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_SDMMC4, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_VFIR, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_EPP, CLOCK_TYPE_MCPA),
+ TYPE(PERIPHC_MPE, CLOCK_TYPE_MCPA),
+ TYPE(PERIPHC_MIPI, CLOCK_TYPE_PCMT), /* MIPI base-band HSI */
+ TYPE(PERIPHC_UART1, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_UART2, CLOCK_TYPE_PCMT),
+
+ /* 0x20 */
+ TYPE(PERIPHC_HOST1X, CLOCK_TYPE_MCPA),
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+ TYPE(PERIPHC_TVO, CLOCK_TYPE_PDCT),
+ TYPE(PERIPHC_HDMI, CLOCK_TYPE_PMDACD2T),
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+ TYPE(PERIPHC_TVDAC, CLOCK_TYPE_PDCT),
+ TYPE(PERIPHC_I2C2, CLOCK_TYPE_PCMT16),
+ TYPE(PERIPHC_EMC, CLOCK_TYPE_MCPT),
+
+ /* 0x28 */
+ TYPE(PERIPHC_UART3, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+ TYPE(PERIPHC_VI, CLOCK_TYPE_MCPA),
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+ TYPE(PERIPHC_SBC4, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_I2C3, CLOCK_TYPE_PCMT16),
+ TYPE(PERIPHC_SDMMC3, CLOCK_TYPE_PCMT),
+
+ /* 0x30 */
+ TYPE(PERIPHC_UART4, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_UART5, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_VDE, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_OWR, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_NOR, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_CSITE, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_I2S0, CLOCK_TYPE_AXPT),
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+
+ /* 0x38h */ /* Jumps to reg offset 0x3B0h - new for T30 */
+ TYPE(PERIPHC_G3D2, CLOCK_TYPE_MCPA),
+ TYPE(PERIPHC_MSELECT, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_TSENSOR, CLOCK_TYPE_PCST), /* s/b PCTS */
+ TYPE(PERIPHC_I2S3, CLOCK_TYPE_AXPT),
+ TYPE(PERIPHC_I2S4, CLOCK_TYPE_AXPT),
+ TYPE(PERIPHC_I2C4, CLOCK_TYPE_PCMT16),
+ TYPE(PERIPHC_SBC5, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_SBC6, CLOCK_TYPE_PCMT),
+
+ /* 0x40 */
+ TYPE(PERIPHC_AUDIO, CLOCK_TYPE_ACPT),
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+ TYPE(PERIPHC_DAM0, CLOCK_TYPE_ACPT),
+ TYPE(PERIPHC_DAM1, CLOCK_TYPE_ACPT),
+ TYPE(PERIPHC_DAM2, CLOCK_TYPE_ACPT),
+ TYPE(PERIPHC_HDA2CODEC2X, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_ACTMON, CLOCK_TYPE_PCST), /* MASK 31:30 */
+ TYPE(PERIPHC_EXTPERIPH1, CLOCK_TYPE_ASPTE),
+
+ /* 0x48 */
+ TYPE(PERIPHC_EXTPERIPH2, CLOCK_TYPE_ASPTE),
+ TYPE(PERIPHC_EXTPERIPH3, CLOCK_TYPE_ASPTE),
+ TYPE(PERIPHC_NANDSPEED, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_I2CSLOW, CLOCK_TYPE_PCST), /* MASK 31:30 */
+ TYPE(PERIPHC_SYS, CLOCK_TYPE_NONE),
+ TYPE(PERIPHC_SPEEDO, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+
+ /* 0x50 */
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+ TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
+ TYPE(PERIPHC_SATAOOB, CLOCK_TYPE_PCMT), /* offset 0x420h */
+ TYPE(PERIPHC_SATA, CLOCK_TYPE_PCMT),
+ TYPE(PERIPHC_HDA, CLOCK_TYPE_PCMT),
+};
+
+/*
+ * This array translates a periph_id to a periphc_internal_id
+ *
+ * Not present/matched up:
+ * uint vi_sensor; _VI_SENSOR_0, 0x1A8
+ * SPDIF - which is both 0x08 and 0x0c
+ *
+ */
+#define NONE(name) (-1)
+#define OFFSET(name, value) PERIPHC_ ## name
+static s8 periph_id_to_internal_id[PERIPH_ID_COUNT] = {
+ /* Low word: 31:0 */
+ NONE(CPU),
+ NONE(COP),
+ NONE(TRIGSYS),
+ NONE(RESERVED3),
+ NONE(RESERVED4),
+ NONE(TMR),
+ PERIPHC_UART1,
+ PERIPHC_UART2, /* and vfir 0x68 */
+
+ /* 8 */
+ NONE(GPIO),
+ PERIPHC_SDMMC2,
+ NONE(SPDIF), /* 0x08 and 0x0c, unclear which to use */
+ PERIPHC_I2S1,
+ PERIPHC_I2C1,
+ PERIPHC_NDFLASH,
+ PERIPHC_SDMMC1,
+ PERIPHC_SDMMC4,
+
+ /* 16 */
+ NONE(RESERVED16),
+ PERIPHC_PWM,
+ PERIPHC_I2S2,
+ PERIPHC_EPP,
+ PERIPHC_VI,
+ PERIPHC_G2D,
+ NONE(USBD),
+ NONE(ISP),
+
+ /* 24 */
+ PERIPHC_G3D,
+ NONE(RESERVED25),
+ PERIPHC_DISP2,
+ PERIPHC_DISP1,
+ PERIPHC_HOST1X,
+ NONE(VCP),
+ PERIPHC_I2S0,
+ NONE(CACHE2),
+
+ /* Middle word: 63:32 */
+ NONE(MEM),
+ NONE(AHBDMA),
+ NONE(APBDMA),
+ NONE(RESERVED35),
+ NONE(RESERVED36),
+ NONE(STAT_MON),
+ NONE(RESERVED38),
+ NONE(RESERVED39),
+
+ /* 40 */
+ NONE(KFUSE),
+ PERIPHC_SBC1,
+ PERIPHC_NOR,
+ NONE(RESERVED43),
+ PERIPHC_SBC2,
+ NONE(RESERVED45),
+ PERIPHC_SBC3,
+ PERIPHC_DVC_I2C,
+
+ /* 48 */
+ NONE(DSI),
+ PERIPHC_TVO, /* also CVE 0x40 */
+ PERIPHC_MIPI,
+ PERIPHC_HDMI,
+ NONE(CSI),
+ PERIPHC_TVDAC,
+ PERIPHC_I2C2,
+ PERIPHC_UART3,
+
+ /* 56 */
+ NONE(RESERVED56),
+ PERIPHC_EMC,
+ NONE(USB2),
+ NONE(USB3),
+ PERIPHC_MPE,
+ PERIPHC_VDE,
+ NONE(BSEA),
+ NONE(BSEV),
+
+ /* Upper word 95:64 */
+ PERIPHC_SPEEDO,
+ PERIPHC_UART4,
+ PERIPHC_UART5,
+ PERIPHC_I2C3,
+ PERIPHC_SBC4,
+ PERIPHC_SDMMC3,
+ NONE(PCIE),
+ PERIPHC_OWR,
+
+ /* 72 */
+ NONE(AFI),
+ PERIPHC_CSITE,
+ NONE(PCIEXCLK),
+ NONE(AVPUCQ),
+ NONE(RESERVED76),
+ NONE(RESERVED77),
+ NONE(RESERVED78),
+ NONE(DTV),
+
+ /* 80 */
+ PERIPHC_NANDSPEED,
+ PERIPHC_I2CSLOW,
+ NONE(DSIB),
+ NONE(RESERVED83),
+ NONE(IRAMA),
+ NONE(IRAMB),
+ NONE(IRAMC),
+ NONE(IRAMD),
+
+ /* 88 */
+ NONE(CRAM2),
+ NONE(RESERVED89),
+ NONE(MDOUBLER),
+ NONE(RESERVED91),
+ NONE(SUSOUT),
+ NONE(RESERVED93),
+ NONE(RESERVED94),
+ NONE(RESERVED95),
+
+ /* V word: 31:0 */
+ NONE(CPUG),
+ NONE(CPULP),
+ PERIPHC_G3D2,
+ PERIPHC_MSELECT,
+ PERIPHC_TSENSOR,
+ PERIPHC_I2S3,
+ PERIPHC_I2S4,
+ PERIPHC_I2C4,
+
+ /* 08 */
+ PERIPHC_SBC5,
+ PERIPHC_SBC6,
+ PERIPHC_AUDIO,
+ NONE(APBIF),
+ PERIPHC_DAM0,
+ PERIPHC_DAM1,
+ PERIPHC_DAM2,
+ PERIPHC_HDA2CODEC2X,
+
+ /* 16 */
+ NONE(ATOMICS),
+ NONE(RESERVED17),
+ NONE(RESERVED18),
+ NONE(RESERVED19),
+ NONE(RESERVED20),
+ NONE(RESERVED21),
+ NONE(RESERVED22),
+ PERIPHC_ACTMON,
+
+ /* 24 */
+ NONE(RESERVED24),
+ NONE(RESERVED25),
+ NONE(RESERVED26),
+ NONE(RESERVED27),
+ PERIPHC_SATA,
+ PERIPHC_HDA,
+ NONE(RESERVED30),
+ NONE(RESERVED31),
+
+ /* W word: 31:0 */
+ NONE(HDA2HDMICODEC),
+ NONE(SATACOLD),
+ NONE(RESERVED0_PCIERX0),
+ NONE(RESERVED1_PCIERX1),
+ NONE(RESERVED2_PCIERX2),
+ NONE(RESERVED3_PCIERX3),
+ NONE(RESERVED4_PCIERX4),
+ NONE(RESERVED5_PCIERX5),
+
+ /* 40 */
+ NONE(CEC),
+ NONE(RESERVED6_PCIE2),
+ NONE(RESERVED7_EMC),
+ NONE(RESERVED8_HDMI),
+ NONE(RESERVED9_SATA),
+ NONE(RESERVED10_MIPI),
+ NONE(EX_RESERVED46),
+ NONE(EX_RESERVED47),
+};
+
+/*
+ * Get the oscillator frequency, from the corresponding hardware configuration
+ * field. Note that T30 supports 3 new higher freqs, but we map back
+ * to the old T20 freqs. Support for the higher oscillators is TBD.
+ */
+enum clock_osc_freq clock_get_osc_freq(void)
+{
+ struct clk_rst_ctlr *clkrst =
+ (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+ u32 reg;
+
+ reg = readl(&clkrst->crc_osc_ctrl);
+ reg = (reg & OSC_FREQ_MASK) >> OSC_FREQ_SHIFT;
+
+ if (reg & 1) /* one of the newer freqs */
+ printf("Warning: OSC_FREQ is unsupported! (%d)\n", reg);
+
+ return reg >> 2; /* Map to most common (T20) freqs */
+}
+
+/* Returns a pointer to the clock source register for a peripheral */
+u32 *get_periph_source_reg(enum periph_id periph_id)
+{
+ struct clk_rst_ctlr *clkrst =
+ (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+ enum periphc_internal_id internal_id;
+
+ /* Coresight is a special case */
+ if (periph_id == PERIPH_ID_CSI)
+ return &clkrst->crc_clk_src[PERIPH_ID_CSI+1];
+
+ assert(periph_id >= PERIPH_ID_FIRST && periph_id < PERIPH_ID_COUNT);
+ internal_id = periph_id_to_internal_id[periph_id];
+ assert(internal_id != -1);
+ if (internal_id >= PERIPHC_VW_FIRST) {
+ internal_id -= PERIPHC_VW_FIRST;
+ return &clkrst->crc_clk_src_vw[internal_id];
+ } else
+ return &clkrst->crc_clk_src[internal_id];
+}
+
+/**
+ * Given a peripheral ID and the required source clock, this returns which
+ * value should be programmed into the source mux for that peripheral.
+ *
+ * There is special code here to handle the one source type with 5 sources.
+ *
+ * @param periph_id peripheral to start
+ * @param source PLL id of required parent clock
+ * @param mux_bits Set to number of bits in mux register: 2 or 4
+ * @param divider_bits Set to number of divider bits (8 or 16)
+ * @return mux value (0-4, or -1 if not found)
+ */
+int get_periph_clock_source(enum periph_id periph_id,
+ enum clock_id parent, int *mux_bits, int *divider_bits)
+{
+ enum clock_type_id type;
+ enum periphc_internal_id internal_id;
+ int mux;
+
+ assert(clock_periph_id_isvalid(periph_id));
+
+ internal_id = periph_id_to_internal_id[periph_id];
+ assert(periphc_internal_id_isvalid(internal_id));
+
+ type = clock_periph_type[internal_id];
+ assert(clock_type_id_isvalid(type));
+
+ *mux_bits = clock_source[type][CLOCK_MAX_MUX];
+
+ if (type == CLOCK_TYPE_PCMT16)
+ *divider_bits = 16;
+ else
+ *divider_bits = 8;
+
+ for (mux = 0; mux < CLOCK_MAX_MUX; mux++)
+ if (clock_source[type][mux] == parent)
+ return mux;
+
+ /* if we get here, either us or the caller has made a mistake */
+ printf("Caller requested bad clock: periph=%d, parent=%d\n", periph_id,
+ parent);
+ return -1;
+}
+
+void clock_set_enable(enum periph_id periph_id, int enable)
+{
+ struct clk_rst_ctlr *clkrst =
+ (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+ u32 *clk;
+ u32 reg;
+
+ /* Enable/disable the clock to this peripheral */
+ assert(clock_periph_id_isvalid(periph_id));
+ if ((int)periph_id < (int)PERIPH_ID_VW_FIRST)
+ clk = &clkrst->crc_clk_out_enb[PERIPH_REG(periph_id)];
+ else
+ clk = &clkrst->crc_clk_out_enb_vw[PERIPH_REG(periph_id)];
+ reg = readl(clk);
+ if (enable)
+ reg |= PERIPH_MASK(periph_id);
+ else
+ reg &= ~PERIPH_MASK(periph_id);
+ writel(reg, clk);
+}
+
+void reset_set_enable(enum periph_id periph_id, int enable)
+{
+ struct clk_rst_ctlr *clkrst =
+ (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+ u32 *reset;
+ u32 reg;
+
+ /* Enable/disable reset to the peripheral */
+ assert(clock_periph_id_isvalid(periph_id));
+ if (periph_id < PERIPH_ID_VW_FIRST)
+ reset = &clkrst->crc_rst_dev[PERIPH_REG(periph_id)];
+ else
+ reset = &clkrst->crc_rst_dev_vw[PERIPH_REG(periph_id)];
+ reg = readl(reset);
+ if (enable)
+ reg |= PERIPH_MASK(periph_id);
+ else
+ reg &= ~PERIPH_MASK(periph_id);
+ writel(reg, reset);
+}
+
+#ifdef CONFIG_OF_CONTROL
+/*
+ * Convert a device tree clock ID to our peripheral ID. They are mostly
+ * the same but we are very cautious so we check that a valid clock ID is
+ * provided.
+ *
+ * @param clk_id Clock ID according to tegra30 device tree binding
+ * @return peripheral ID, or PERIPH_ID_NONE if the clock ID is invalid
+ */
+enum periph_id clk_id_to_periph_id(int clk_id)
+{
+ if (clk_id > PERIPH_ID_COUNT)
+ return PERIPH_ID_NONE;
+
+ switch (clk_id) {
+ case PERIPH_ID_RESERVED3:
+ case PERIPH_ID_RESERVED4:
+ case PERIPH_ID_RESERVED16:
+ case PERIPH_ID_RESERVED24:
+ case PERIPH_ID_RESERVED35:
+ case PERIPH_ID_RESERVED43:
+ case PERIPH_ID_RESERVED45:
+ case PERIPH_ID_RESERVED56:
+ case PERIPH_ID_RESERVED76:
+ case PERIPH_ID_RESERVED77:
+ case PERIPH_ID_RESERVED78:
+ case PERIPH_ID_RESERVED83:
+ case PERIPH_ID_RESERVED89:
+ case PERIPH_ID_RESERVED91:
+ case PERIPH_ID_RESERVED93:
+ case PERIPH_ID_RESERVED94:
+ case PERIPH_ID_RESERVED95:
+ return PERIPH_ID_NONE;
+ default:
+ return clk_id;
+ }
+}
+#endif /* CONFIG_OF_CONTROL */
+
+void clock_early_init(void)
+{
+ /*
+ * PLLP output frequency set to 408Mhz
+ * PLLC output frequency set to 228Mhz
+ */
+ switch (clock_get_osc_freq()) {
+ case CLOCK_OSC_FREQ_12_0: /* OSC is 12Mhz */
+ clock_set_rate(CLOCK_ID_PERIPH, 408, 12, 0, 8);
+ clock_set_rate(CLOCK_ID_CGENERAL, 456, 12, 1, 8);
+ break;
+
+ case CLOCK_OSC_FREQ_26_0: /* OSC is 26Mhz */
+ clock_set_rate(CLOCK_ID_PERIPH, 408, 26, 0, 8);
+ clock_set_rate(CLOCK_ID_CGENERAL, 600, 26, 0, 8);
+ break;
+
+ case CLOCK_OSC_FREQ_13_0: /* OSC is 13Mhz */
+ clock_set_rate(CLOCK_ID_PERIPH, 408, 13, 0, 8);
+ clock_set_rate(CLOCK_ID_CGENERAL, 600, 13, 0, 8);
+ break;
+ case CLOCK_OSC_FREQ_19_2:
+ default:
+ /*
+ * These are not supported. It is too early to print a
+ * message and the UART likely won't work anyway due to the
+ * oscillator being wrong.
+ */
+ break;
+ }
+}
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-10-31 14:40:19 +0000