![Linus Torvalds](/assets/img/avatar_default.png)
- boot_mem_map is removed, providing a nice cleanup made possible by the recent removal of bootmem. - Some fixes to atomics, in general providing compiler barriers for smp_mb__{before,after}_atomic plus fixes specific to Loongson CPUs or MIPS32 systems using cmpxchg64(). - Conversion to the new generic VDSO infrastructure courtesy of Vincenzo Frascino. - Removal of undefined behavior in set_io_port_base(), fixing the behavior of some MIPS kernel configurations when built with recent clang versions. - Initial MIPS32 huge page support, functional on at least Ingenic SoCs. - pte_special() is now supported for some configurations, allowing among other things generic fast GUP to be used. - Miscellaneous fixes & cleanups. And platform specific changes: - Major improvements to Ingenic SoC support from Paul Cercueil, mostly enabled by the inclusion of the new TCU (timer-counter unit) drivers he's spent a very patient year or so working on. Plus some fixes for X1000 SoCs from Zhou Yanjie. - Netgear R6200 v1 systems are now supported by the bcm47xx platform. - DT updates for BMIPS, Lantiq & Microsemi Ocelot systems. -----BEGIN PGP SIGNATURE----- iIsEABYIADMWIQRgLjeFAZEXQzy86/s+p5+stXUA3QUCXYaqpRUccGF1bC5idXJ0 b25AbWlwcy5jb20ACgkQPqefrLV1AN2JUQD+PQGFIlq9bo/3vLyqsXJffm+DhwVQ 4WSCSeN5brPkO8EA/153sRJBlRtG+KK5p9f7WYKUuBfbcEawuc1uwmKuy7cG =lWlM -----END PGP SIGNATURE----- Merge tag 'mips_5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux Pull MIPS updates from Paul Burton: "Main MIPS changes: - boot_mem_map is removed, providing a nice cleanup made possible by the recent removal of bootmem. - Some fixes to atomics, in general providing compiler barriers for smp_mb__{before,after}_atomic plus fixes specific to Loongson CPUs or MIPS32 systems using cmpxchg64(). - Conversion to the new generic VDSO infrastructure courtesy of Vincenzo Frascino. - Removal of undefined behavior in set_io_port_base(), fixing the behavior of some MIPS kernel configurations when built with recent clang versions. - Initial MIPS32 huge page support, functional on at least Ingenic SoCs. - pte_special() is now supported for some configurations, allowing among other things generic fast GUP to be used. - Miscellaneous fixes & cleanups. And platform specific changes: - Major improvements to Ingenic SoC support from Paul Cercueil, mostly enabled by the inclusion of the new TCU (timer-counter unit) drivers he's spent a very patient year or so working on. Plus some fixes for X1000 SoCs from Zhou Yanjie. - Netgear R6200 v1 systems are now supported by the bcm47xx platform. - DT updates for BMIPS, Lantiq & Microsemi Ocelot systems" * tag 'mips_5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (89 commits) MIPS: Detect bad _PFN_SHIFT values MIPS: Disable pte_special() for MIPS32 with RiXi MIPS: ralink: deactivate PCI support for SOC_MT7621 mips: compat: vdso: Use legacy syscalls as fallback MIPS: Drop Loongson _CACHE_* definitions MIPS: tlbex: Remove cpu_has_local_ebase MIPS: tlbex: Simplify r3k check MIPS: Select R3k-style TLB in Kconfig MIPS: PCI: refactor ioc3 special handling mips: remove ioremap_cachable mips/atomic: Fix smp_mb__{before,after}_atomic() mips/atomic: Fix loongson_llsc_mb() wreckage mips/atomic: Fix cmpxchg64 barriers MIPS: Octeon: remove duplicated include from dma-octeon.c firmware: bcm47xx_nvram: Allow COMPILE_TEST firmware: bcm47xx_nvram: Correct size_t printf format MIPS: Treat Loongson Extensions as ASEs MIPS: Remove dev_err() usage after platform_get_irq() MIPS: dts: mscc: describe the PTP ready interrupt MIPS: dts: mscc: describe the PTP register range ...
258 lines
5.9 KiB
C
258 lines
5.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Ingenic JZ4740 SoC CGU driver
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*
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* Copyright (c) 2015 Imagination Technologies
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* Author: Paul Burton <paul.burton@mips.com>
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*/
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#include <linux/clk-provider.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <dt-bindings/clock/jz4740-cgu.h>
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#include "cgu.h"
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#include "pm.h"
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/* CGU register offsets */
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#define CGU_REG_CPCCR 0x00
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#define CGU_REG_LCR 0x04
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#define CGU_REG_CPPCR 0x10
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#define CGU_REG_CLKGR 0x20
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#define CGU_REG_SCR 0x24
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#define CGU_REG_I2SCDR 0x60
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#define CGU_REG_LPCDR 0x64
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#define CGU_REG_MSCCDR 0x68
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#define CGU_REG_UHCCDR 0x6c
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#define CGU_REG_SSICDR 0x74
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/* bits within a PLL control register */
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#define PLLCTL_M_SHIFT 23
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#define PLLCTL_M_MASK (0x1ff << PLLCTL_M_SHIFT)
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#define PLLCTL_N_SHIFT 18
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#define PLLCTL_N_MASK (0x1f << PLLCTL_N_SHIFT)
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#define PLLCTL_OD_SHIFT 16
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#define PLLCTL_OD_MASK (0x3 << PLLCTL_OD_SHIFT)
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#define PLLCTL_STABLE (1 << 10)
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#define PLLCTL_BYPASS (1 << 9)
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#define PLLCTL_ENABLE (1 << 8)
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/* bits within the LCR register */
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#define LCR_SLEEP (1 << 0)
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/* bits within the CLKGR register */
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#define CLKGR_UDC (1 << 11)
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static struct ingenic_cgu *cgu;
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static const s8 pll_od_encoding[4] = {
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0x0, 0x1, -1, 0x3,
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};
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static const u8 jz4740_cgu_cpccr_div_table[] = {
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1, 2, 3, 4, 6, 8, 12, 16, 24, 32,
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};
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static const u8 jz4740_cgu_pll_half_div_table[] = {
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2, 1,
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};
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static const struct ingenic_cgu_clk_info jz4740_cgu_clocks[] = {
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/* External clocks */
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[JZ4740_CLK_EXT] = { "ext", CGU_CLK_EXT },
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[JZ4740_CLK_RTC] = { "rtc", CGU_CLK_EXT },
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[JZ4740_CLK_PLL] = {
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"pll", CGU_CLK_PLL,
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.parents = { JZ4740_CLK_EXT, -1, -1, -1 },
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.pll = {
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.reg = CGU_REG_CPPCR,
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.m_shift = 23,
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.m_bits = 9,
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.m_offset = 2,
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.n_shift = 18,
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.n_bits = 5,
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.n_offset = 2,
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.od_shift = 16,
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.od_bits = 2,
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.od_max = 4,
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.od_encoding = pll_od_encoding,
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.stable_bit = 10,
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.bypass_bit = 9,
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.enable_bit = 8,
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},
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},
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/* Muxes & dividers */
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[JZ4740_CLK_PLL_HALF] = {
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"pll half", CGU_CLK_DIV,
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.parents = { JZ4740_CLK_PLL, -1, -1, -1 },
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.div = {
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CGU_REG_CPCCR, 21, 1, 1, -1, -1, -1,
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jz4740_cgu_pll_half_div_table,
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},
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},
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[JZ4740_CLK_CCLK] = {
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"cclk", CGU_CLK_DIV,
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.parents = { JZ4740_CLK_PLL, -1, -1, -1 },
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.div = {
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CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1,
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jz4740_cgu_cpccr_div_table,
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},
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},
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[JZ4740_CLK_HCLK] = {
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"hclk", CGU_CLK_DIV,
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.parents = { JZ4740_CLK_PLL, -1, -1, -1 },
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.div = {
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CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1,
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jz4740_cgu_cpccr_div_table,
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},
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},
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[JZ4740_CLK_PCLK] = {
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"pclk", CGU_CLK_DIV,
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.parents = { JZ4740_CLK_PLL, -1, -1, -1 },
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.div = {
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CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1,
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jz4740_cgu_cpccr_div_table,
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},
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},
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[JZ4740_CLK_MCLK] = {
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"mclk", CGU_CLK_DIV,
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.parents = { JZ4740_CLK_PLL, -1, -1, -1 },
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.div = {
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CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1,
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jz4740_cgu_cpccr_div_table,
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},
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},
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[JZ4740_CLK_LCD] = {
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"lcd", CGU_CLK_DIV | CGU_CLK_GATE,
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.parents = { JZ4740_CLK_PLL_HALF, -1, -1, -1 },
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.div = {
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CGU_REG_CPCCR, 16, 1, 5, 22, -1, -1,
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jz4740_cgu_cpccr_div_table,
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},
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.gate = { CGU_REG_CLKGR, 10 },
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},
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[JZ4740_CLK_LCD_PCLK] = {
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"lcd_pclk", CGU_CLK_DIV,
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.parents = { JZ4740_CLK_PLL_HALF, -1, -1, -1 },
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.div = { CGU_REG_LPCDR, 0, 1, 11, -1, -1, -1 },
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},
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[JZ4740_CLK_I2S] = {
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"i2s", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
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.parents = { JZ4740_CLK_EXT, JZ4740_CLK_PLL_HALF, -1, -1 },
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.mux = { CGU_REG_CPCCR, 31, 1 },
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.div = { CGU_REG_I2SCDR, 0, 1, 9, -1, -1, -1 },
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.gate = { CGU_REG_CLKGR, 6 },
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},
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[JZ4740_CLK_SPI] = {
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"spi", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
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.parents = { JZ4740_CLK_EXT, JZ4740_CLK_PLL, -1, -1 },
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.mux = { CGU_REG_SSICDR, 31, 1 },
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.div = { CGU_REG_SSICDR, 0, 1, 4, -1, -1, -1 },
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.gate = { CGU_REG_CLKGR, 4 },
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},
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[JZ4740_CLK_MMC] = {
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"mmc", CGU_CLK_DIV | CGU_CLK_GATE,
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.parents = { JZ4740_CLK_PLL_HALF, -1, -1, -1 },
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.div = { CGU_REG_MSCCDR, 0, 1, 5, -1, -1, -1 },
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.gate = { CGU_REG_CLKGR, 7 },
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},
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[JZ4740_CLK_UHC] = {
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"uhc", CGU_CLK_DIV | CGU_CLK_GATE,
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.parents = { JZ4740_CLK_PLL_HALF, -1, -1, -1 },
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.div = { CGU_REG_UHCCDR, 0, 1, 4, -1, -1, -1 },
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.gate = { CGU_REG_CLKGR, 14 },
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},
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[JZ4740_CLK_UDC] = {
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"udc", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
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.parents = { JZ4740_CLK_EXT, JZ4740_CLK_PLL_HALF, -1, -1 },
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.mux = { CGU_REG_CPCCR, 29, 1 },
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.div = { CGU_REG_CPCCR, 23, 1, 6, -1, -1, -1 },
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.gate = { CGU_REG_SCR, 6, true },
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},
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/* Gate-only clocks */
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[JZ4740_CLK_UART0] = {
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"uart0", CGU_CLK_GATE,
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.parents = { JZ4740_CLK_EXT, -1, -1, -1 },
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.gate = { CGU_REG_CLKGR, 0 },
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},
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[JZ4740_CLK_UART1] = {
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"uart1", CGU_CLK_GATE,
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.parents = { JZ4740_CLK_EXT, -1, -1, -1 },
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.gate = { CGU_REG_CLKGR, 15 },
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},
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[JZ4740_CLK_DMA] = {
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"dma", CGU_CLK_GATE,
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.parents = { JZ4740_CLK_PCLK, -1, -1, -1 },
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.gate = { CGU_REG_CLKGR, 12 },
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},
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[JZ4740_CLK_IPU] = {
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"ipu", CGU_CLK_GATE,
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.parents = { JZ4740_CLK_PCLK, -1, -1, -1 },
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.gate = { CGU_REG_CLKGR, 13 },
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},
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[JZ4740_CLK_ADC] = {
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"adc", CGU_CLK_GATE,
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.parents = { JZ4740_CLK_EXT, -1, -1, -1 },
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.gate = { CGU_REG_CLKGR, 8 },
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},
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[JZ4740_CLK_I2C] = {
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"i2c", CGU_CLK_GATE,
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.parents = { JZ4740_CLK_EXT, -1, -1, -1 },
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.gate = { CGU_REG_CLKGR, 3 },
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},
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[JZ4740_CLK_AIC] = {
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"aic", CGU_CLK_GATE,
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.parents = { JZ4740_CLK_EXT, -1, -1, -1 },
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.gate = { CGU_REG_CLKGR, 5 },
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},
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[JZ4740_CLK_TCU] = {
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"tcu", CGU_CLK_GATE,
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.parents = { JZ4740_CLK_EXT, -1, -1, -1 },
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.gate = { CGU_REG_CLKGR, 1 },
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},
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};
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static void __init jz4740_cgu_init(struct device_node *np)
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{
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int retval;
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cgu = ingenic_cgu_new(jz4740_cgu_clocks,
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ARRAY_SIZE(jz4740_cgu_clocks), np);
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if (!cgu) {
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pr_err("%s: failed to initialise CGU\n", __func__);
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return;
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}
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retval = ingenic_cgu_register_clocks(cgu);
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if (retval)
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pr_err("%s: failed to register CGU Clocks\n", __func__);
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ingenic_cgu_register_syscore_ops(cgu);
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}
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CLK_OF_DECLARE_DRIVER(jz4740_cgu, "ingenic,jz4740-cgu", jz4740_cgu_init);
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