linux/drivers/clk/ingenic/jz4740-cgu.c

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/*
* Ingenic JZ4740 SoC CGU driver
*
* Copyright (c) 2015 Imagination Technologies
Update MIPS email addresses MIPS will soon not be a part of Imagination Technologies, and as such many @imgtec.com email addresses will no longer be valid. This patch updates the addresses for those who: - Have 10 or more patches in mainline authored using an @imgtec.com email address, or any patches dated within the past year. - Are still with Imagination but leaving as part of the MIPS business unit, as determined from an internal email address list. - Haven't already updated their email address (ie. JamesH) or expressed a desire to be excluded (ie. Maciej). - Acked v2 or earlier of this patch, which leaves Deng-Cheng, Matt & myself. New addresses are of the form firstname.lastname@mips.com, and all verified against an internal email address list. An entry is added to .mailmap for each person such that get_maintainer.pl will report the new addresses rather than @imgtec.com addresses which will soon be dead. Instances of the affected addresses throughout the tree are then mechanically replaced with the new @mips.com address. Signed-off-by: Paul Burton <paul.burton@mips.com> Cc: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com> Cc: Deng-Cheng Zhu <dengcheng.zhu@mips.com> Acked-by: Dengcheng Zhu <dengcheng.zhu@mips.com> Cc: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Matt Redfearn <matt.redfearn@mips.com> Acked-by: Matt Redfearn <matt.redfearn@mips.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: trivial@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-10-26 08:04:33 +08:00
* Author: Paul Burton <paul.burton@mips.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that 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.
*/
#include <linux/clk-provider.h>
#include <linux/delay.h>
clk: Remove io.h from clk-provider.h Now that we've gotten rid of clk_readl() we can remove io.h from the clk-provider header and push out the io.h include to any code that isn't already including the io.h header but using things like readl/writel, etc. Found with this grep: git grep -l clk-provider.h | grep '.c$' | xargs git grep -L 'linux/io.h' | \ xargs git grep -l \ -e '\<__iowrite32_copy\>' --or \ -e '\<__ioread32_copy\>' --or \ -e '\<__iowrite64_copy\>' --or \ -e '\<ioremap_page_range\>' --or \ -e '\<ioremap_huge_init\>' --or \ -e '\<arch_ioremap_pud_supported\>' --or \ -e '\<arch_ioremap_pmd_supported\>' --or \ -e '\<devm_ioport_map\>' --or \ -e '\<devm_ioport_unmap\>' --or \ -e '\<IOMEM_ERR_PTR\>' --or \ -e '\<devm_ioremap\>' --or \ -e '\<devm_ioremap_nocache\>' --or \ -e '\<devm_ioremap_wc\>' --or \ -e '\<devm_iounmap\>' --or \ -e '\<devm_ioremap_release\>' --or \ -e '\<devm_memremap\>' --or \ -e '\<devm_memunmap\>' --or \ -e '\<__devm_memremap_pages\>' --or \ -e '\<pci_remap_cfgspace\>' --or \ -e '\<arch_has_dev_port\>' --or \ -e '\<arch_phys_wc_add\>' --or \ -e '\<arch_phys_wc_del\>' --or \ -e '\<memremap\>' --or \ -e '\<memunmap\>' --or \ -e '\<arch_io_reserve_memtype_wc\>' --or \ -e '\<arch_io_free_memtype_wc\>' --or \ -e '\<__io_aw\>' --or \ -e '\<__io_pbw\>' --or \ -e '\<__io_paw\>' --or \ -e '\<__io_pbr\>' --or \ -e '\<__io_par\>' --or \ -e '\<__raw_readb\>' --or \ -e '\<__raw_readw\>' --or \ -e '\<__raw_readl\>' --or \ -e '\<__raw_readq\>' --or \ -e '\<__raw_writeb\>' --or \ -e '\<__raw_writew\>' --or \ -e '\<__raw_writel\>' --or \ -e '\<__raw_writeq\>' --or \ -e '\<readb\>' --or \ -e '\<readw\>' --or \ -e '\<readl\>' --or \ -e '\<readq\>' --or \ -e '\<writeb\>' --or \ -e '\<writew\>' --or \ -e '\<writel\>' --or \ -e '\<writeq\>' --or \ -e '\<readb_relaxed\>' --or \ -e '\<readw_relaxed\>' --or \ -e '\<readl_relaxed\>' --or \ -e '\<readq_relaxed\>' --or \ -e '\<writeb_relaxed\>' --or \ -e '\<writew_relaxed\>' --or \ -e '\<writel_relaxed\>' --or \ -e '\<writeq_relaxed\>' --or \ -e '\<readsb\>' --or \ -e '\<readsw\>' --or \ -e '\<readsl\>' --or \ -e '\<readsq\>' --or \ -e '\<writesb\>' --or \ -e '\<writesw\>' --or \ -e '\<writesl\>' --or \ -e '\<writesq\>' --or \ -e '\<inb\>' --or \ -e '\<inw\>' --or \ -e '\<inl\>' --or \ -e '\<outb\>' --or \ -e '\<outw\>' --or \ -e '\<outl\>' --or \ -e '\<inb_p\>' --or \ -e '\<inw_p\>' --or \ -e '\<inl_p\>' --or \ -e '\<outb_p\>' --or \ -e '\<outw_p\>' --or \ -e '\<outl_p\>' --or \ -e '\<insb\>' --or \ -e '\<insw\>' --or \ -e '\<insl\>' --or \ -e '\<outsb\>' --or \ -e '\<outsw\>' --or \ -e '\<outsl\>' --or \ -e '\<insb_p\>' --or \ -e '\<insw_p\>' --or \ -e '\<insl_p\>' --or \ -e '\<outsb_p\>' --or \ -e '\<outsw_p\>' --or \ -e '\<outsl_p\>' --or \ -e '\<ioread8\>' --or \ -e '\<ioread16\>' --or \ -e '\<ioread32\>' --or \ -e '\<ioread64\>' --or \ -e '\<iowrite8\>' --or \ -e '\<iowrite16\>' --or \ -e '\<iowrite32\>' --or \ -e '\<iowrite64\>' --or \ -e '\<ioread16be\>' --or \ -e '\<ioread32be\>' --or \ -e '\<ioread64be\>' --or \ -e '\<iowrite16be\>' --or \ -e '\<iowrite32be\>' --or \ -e '\<iowrite64be\>' --or \ -e '\<ioread8_rep\>' --or \ -e '\<ioread16_rep\>' --or \ -e '\<ioread32_rep\>' --or \ -e '\<ioread64_rep\>' --or \ -e '\<iowrite8_rep\>' --or \ -e '\<iowrite16_rep\>' --or \ -e '\<iowrite32_rep\>' --or \ -e '\<iowrite64_rep\>' --or \ -e '\<__io_virt\>' --or \ -e '\<pci_iounmap\>' --or \ -e '\<virt_to_phys\>' --or \ -e '\<phys_to_virt\>' --or \ -e '\<ioremap_uc\>' --or \ -e '\<ioremap\>' --or \ -e '\<__ioremap\>' --or \ -e '\<iounmap\>' --or \ -e '\<ioremap\>' --or \ -e '\<ioremap_nocache\>' --or \ -e '\<ioremap_uc\>' --or \ -e '\<ioremap_wc\>' --or \ -e '\<ioremap_wc\>' --or \ -e '\<ioremap_wt\>' --or \ -e '\<ioport_map\>' --or \ -e '\<ioport_unmap\>' --or \ -e '\<ioport_map\>' --or \ -e '\<ioport_unmap\>' --or \ -e '\<xlate_dev_kmem_ptr\>' --or \ -e '\<xlate_dev_mem_ptr\>' --or \ -e '\<unxlate_dev_mem_ptr\>' --or \ -e '\<virt_to_bus\>' --or \ -e '\<bus_to_virt\>' --or \ -e '\<memset_io\>' --or \ -e '\<memcpy_fromio\>' --or \ -e '\<memcpy_toio\>' I also reordered a couple includes when they weren't alphabetical and removed clk.h from kona, replacing it with clk-provider.h because that driver doesn't use clk consumer APIs. Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Chen-Yu Tsai <wens@csie.org> Acked-by: Maxime Ripard <maxime.ripard@bootlin.com> Acked-by: Tero Kristo <t-kristo@ti.com> Acked-by: Sekhar Nori <nsekhar@ti.com> Cc: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Mark Brown <broonie@kernel.org> Cc: Chris Zankel <chris@zankel.net> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Acked-by: John Crispin <john@phrozen.org> Acked-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2019-04-19 06:20:22 +08:00
#include <linux/io.h>
#include <linux/of.h>
#include <dt-bindings/clock/jz4740-cgu.h>
#include <asm/mach-jz4740/clock.h>
#include "cgu.h"
/* CGU register offsets */
#define CGU_REG_CPCCR 0x00
#define CGU_REG_LCR 0x04
#define CGU_REG_CPPCR 0x10
#define CGU_REG_CLKGR 0x20
#define CGU_REG_SCR 0x24
#define CGU_REG_I2SCDR 0x60
#define CGU_REG_LPCDR 0x64
#define CGU_REG_MSCCDR 0x68
#define CGU_REG_UHCCDR 0x6c
#define CGU_REG_SSICDR 0x74
/* bits within a PLL control register */
#define PLLCTL_M_SHIFT 23
#define PLLCTL_M_MASK (0x1ff << PLLCTL_M_SHIFT)
#define PLLCTL_N_SHIFT 18
#define PLLCTL_N_MASK (0x1f << PLLCTL_N_SHIFT)
#define PLLCTL_OD_SHIFT 16
#define PLLCTL_OD_MASK (0x3 << PLLCTL_OD_SHIFT)
#define PLLCTL_STABLE (1 << 10)
#define PLLCTL_BYPASS (1 << 9)
#define PLLCTL_ENABLE (1 << 8)
/* bits within the LCR register */
#define LCR_SLEEP (1 << 0)
/* bits within the CLKGR register */
#define CLKGR_UDC (1 << 11)
static struct ingenic_cgu *cgu;
static const s8 pll_od_encoding[4] = {
0x0, 0x1, -1, 0x3,
};
static const struct ingenic_cgu_clk_info jz4740_cgu_clocks[] = {
/* External clocks */
[JZ4740_CLK_EXT] = { "ext", CGU_CLK_EXT },
[JZ4740_CLK_RTC] = { "rtc", CGU_CLK_EXT },
[JZ4740_CLK_PLL] = {
"pll", CGU_CLK_PLL,
.parents = { JZ4740_CLK_EXT, -1, -1, -1 },
.pll = {
.reg = CGU_REG_CPPCR,
.m_shift = 23,
.m_bits = 9,
.m_offset = 2,
.n_shift = 18,
.n_bits = 5,
.n_offset = 2,
.od_shift = 16,
.od_bits = 2,
.od_max = 4,
.od_encoding = pll_od_encoding,
.stable_bit = 10,
.bypass_bit = 9,
.enable_bit = 8,
},
},
/* Muxes & dividers */
[JZ4740_CLK_PLL_HALF] = {
"pll half", CGU_CLK_DIV,
.parents = { JZ4740_CLK_PLL, -1, -1, -1 },
.div = { CGU_REG_CPCCR, 21, 1, 1, -1, -1, -1 },
},
[JZ4740_CLK_CCLK] = {
"cclk", CGU_CLK_DIV,
.parents = { JZ4740_CLK_PLL, -1, -1, -1 },
.div = { CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1 },
},
[JZ4740_CLK_HCLK] = {
"hclk", CGU_CLK_DIV,
.parents = { JZ4740_CLK_PLL, -1, -1, -1 },
.div = { CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1 },
},
[JZ4740_CLK_PCLK] = {
"pclk", CGU_CLK_DIV,
.parents = { JZ4740_CLK_PLL, -1, -1, -1 },
.div = { CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1 },
},
[JZ4740_CLK_MCLK] = {
"mclk", CGU_CLK_DIV,
.parents = { JZ4740_CLK_PLL, -1, -1, -1 },
.div = { CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1 },
},
[JZ4740_CLK_LCD] = {
"lcd", CGU_CLK_DIV | CGU_CLK_GATE,
.parents = { JZ4740_CLK_PLL_HALF, -1, -1, -1 },
.div = { CGU_REG_CPCCR, 16, 1, 5, 22, -1, -1 },
.gate = { CGU_REG_CLKGR, 10 },
},
[JZ4740_CLK_LCD_PCLK] = {
"lcd_pclk", CGU_CLK_DIV,
.parents = { JZ4740_CLK_PLL_HALF, -1, -1, -1 },
.div = { CGU_REG_LPCDR, 0, 1, 11, -1, -1, -1 },
},
[JZ4740_CLK_I2S] = {
"i2s", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
.parents = { JZ4740_CLK_EXT, JZ4740_CLK_PLL_HALF, -1, -1 },
.mux = { CGU_REG_CPCCR, 31, 1 },
.div = { CGU_REG_I2SCDR, 0, 1, 9, -1, -1, -1 },
.gate = { CGU_REG_CLKGR, 6 },
},
[JZ4740_CLK_SPI] = {
"spi", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
.parents = { JZ4740_CLK_EXT, JZ4740_CLK_PLL, -1, -1 },
.mux = { CGU_REG_SSICDR, 31, 1 },
.div = { CGU_REG_SSICDR, 0, 1, 4, -1, -1, -1 },
.gate = { CGU_REG_CLKGR, 4 },
},
[JZ4740_CLK_MMC] = {
"mmc", CGU_CLK_DIV | CGU_CLK_GATE,
.parents = { JZ4740_CLK_PLL_HALF, -1, -1, -1 },
.div = { CGU_REG_MSCCDR, 0, 1, 5, -1, -1, -1 },
.gate = { CGU_REG_CLKGR, 7 },
},
[JZ4740_CLK_UHC] = {
"uhc", CGU_CLK_DIV | CGU_CLK_GATE,
.parents = { JZ4740_CLK_PLL_HALF, -1, -1, -1 },
.div = { CGU_REG_UHCCDR, 0, 1, 4, -1, -1, -1 },
.gate = { CGU_REG_CLKGR, 14 },
},
[JZ4740_CLK_UDC] = {
"udc", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
.parents = { JZ4740_CLK_EXT, JZ4740_CLK_PLL_HALF, -1, -1 },
.mux = { CGU_REG_CPCCR, 29, 1 },
.div = { CGU_REG_CPCCR, 23, 1, 6, -1, -1, -1 },
.gate = { CGU_REG_SCR, 6, true },
},
/* Gate-only clocks */
[JZ4740_CLK_UART0] = {
"uart0", CGU_CLK_GATE,
.parents = { JZ4740_CLK_EXT, -1, -1, -1 },
.gate = { CGU_REG_CLKGR, 0 },
},
[JZ4740_CLK_UART1] = {
"uart1", CGU_CLK_GATE,
.parents = { JZ4740_CLK_EXT, -1, -1, -1 },
.gate = { CGU_REG_CLKGR, 15 },
},
[JZ4740_CLK_DMA] = {
"dma", CGU_CLK_GATE,
.parents = { JZ4740_CLK_PCLK, -1, -1, -1 },
.gate = { CGU_REG_CLKGR, 12 },
},
[JZ4740_CLK_IPU] = {
"ipu", CGU_CLK_GATE,
.parents = { JZ4740_CLK_PCLK, -1, -1, -1 },
.gate = { CGU_REG_CLKGR, 13 },
},
[JZ4740_CLK_ADC] = {
"adc", CGU_CLK_GATE,
.parents = { JZ4740_CLK_EXT, -1, -1, -1 },
.gate = { CGU_REG_CLKGR, 8 },
},
[JZ4740_CLK_I2C] = {
"i2c", CGU_CLK_GATE,
.parents = { JZ4740_CLK_EXT, -1, -1, -1 },
.gate = { CGU_REG_CLKGR, 3 },
},
[JZ4740_CLK_AIC] = {
"aic", CGU_CLK_GATE,
.parents = { JZ4740_CLK_EXT, -1, -1, -1 },
.gate = { CGU_REG_CLKGR, 5 },
},
};
static void __init jz4740_cgu_init(struct device_node *np)
{
int retval;
cgu = ingenic_cgu_new(jz4740_cgu_clocks,
ARRAY_SIZE(jz4740_cgu_clocks), np);
if (!cgu) {
pr_err("%s: failed to initialise CGU\n", __func__);
return;
}
retval = ingenic_cgu_register_clocks(cgu);
if (retval)
pr_err("%s: failed to register CGU Clocks\n", __func__);
}
CLK_OF_DECLARE(jz4740_cgu, "ingenic,jz4740-cgu", jz4740_cgu_init);
void jz4740_clock_set_wait_mode(enum jz4740_wait_mode mode)
{
uint32_t lcr = readl(cgu->base + CGU_REG_LCR);
switch (mode) {
case JZ4740_WAIT_MODE_IDLE:
lcr &= ~LCR_SLEEP;
break;
case JZ4740_WAIT_MODE_SLEEP:
lcr |= LCR_SLEEP;
break;
}
writel(lcr, cgu->base + CGU_REG_LCR);
}
void jz4740_clock_udc_disable_auto_suspend(void)
{
uint32_t clkgr = readl(cgu->base + CGU_REG_CLKGR);
clkgr &= ~CLKGR_UDC;
writel(clkgr, cgu->base + CGU_REG_CLKGR);
}
EXPORT_SYMBOL_GPL(jz4740_clock_udc_disable_auto_suspend);
void jz4740_clock_udc_enable_auto_suspend(void)
{
uint32_t clkgr = readl(cgu->base + CGU_REG_CLKGR);
clkgr |= CLKGR_UDC;
writel(clkgr, cgu->base + CGU_REG_CLKGR);
}
EXPORT_SYMBOL_GPL(jz4740_clock_udc_enable_auto_suspend);
#define JZ_CLOCK_GATE_UART0 BIT(0)
#define JZ_CLOCK_GATE_TCU BIT(1)
#define JZ_CLOCK_GATE_DMAC BIT(12)
void jz4740_clock_suspend(void)
{
uint32_t clkgr, cppcr;
clkgr = readl(cgu->base + CGU_REG_CLKGR);
clkgr |= JZ_CLOCK_GATE_TCU | JZ_CLOCK_GATE_DMAC | JZ_CLOCK_GATE_UART0;
writel(clkgr, cgu->base + CGU_REG_CLKGR);
cppcr = readl(cgu->base + CGU_REG_CPPCR);
cppcr &= ~BIT(jz4740_cgu_clocks[JZ4740_CLK_PLL].pll.enable_bit);
writel(cppcr, cgu->base + CGU_REG_CPPCR);
}
void jz4740_clock_resume(void)
{
uint32_t clkgr, cppcr, stable;
cppcr = readl(cgu->base + CGU_REG_CPPCR);
cppcr |= BIT(jz4740_cgu_clocks[JZ4740_CLK_PLL].pll.enable_bit);
writel(cppcr, cgu->base + CGU_REG_CPPCR);
stable = BIT(jz4740_cgu_clocks[JZ4740_CLK_PLL].pll.stable_bit);
do {
cppcr = readl(cgu->base + CGU_REG_CPPCR);
} while (!(cppcr & stable));
clkgr = readl(cgu->base + CGU_REG_CLKGR);
clkgr &= ~JZ_CLOCK_GATE_TCU;
clkgr &= ~JZ_CLOCK_GATE_DMAC;
clkgr &= ~JZ_CLOCK_GATE_UART0;
writel(clkgr, cgu->base + CGU_REG_CLKGR);
}