diff options
author | Paul Cercueil <paul@crapouillou.net> | 2018-08-23 15:17:44 +0200 |
---|---|---|
committer | Stephen Boyd <sboyd@kernel.org> | 2018-10-16 15:19:48 -0700 |
commit | 226dfa4726ebb102479d668e01160a1dc77485e8 (patch) | |
tree | 8863583260db165daa7597ee12313fa7ce064e07 /drivers/clk/ingenic | |
parent | 2fdecde7752be5696c0ae301a0d1b1884081a0f1 (diff) | |
download | linux-226dfa4726ebb102479d668e01160a1dc77485e8.tar.bz2 |
clk: Add Ingenic jz4725b CGU driver
Add support for the clocks provided by the CGU in the Ingenic JZ4725B
SoC.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Diffstat (limited to 'drivers/clk/ingenic')
-rw-r--r-- | drivers/clk/ingenic/Kconfig | 10 | ||||
-rw-r--r-- | drivers/clk/ingenic/Makefile | 1 | ||||
-rw-r--r-- | drivers/clk/ingenic/jz4725b-cgu.c | 225 |
3 files changed, 236 insertions, 0 deletions
diff --git a/drivers/clk/ingenic/Kconfig b/drivers/clk/ingenic/Kconfig index 2445437f8286..34dc0da79c39 100644 --- a/drivers/clk/ingenic/Kconfig +++ b/drivers/clk/ingenic/Kconfig @@ -14,6 +14,16 @@ config INGENIC_CGU_JZ4740 If building for a JZ4740 SoC, you want to say Y here. +config INGENIC_CGU_JZ4725B + bool "Ingenic JZ4725B CGU driver" + default MACH_JZ4725B + select INGENIC_CGU_COMMON + help + Support the clocks provided by the CGU hardware on Ingenic JZ4725B + and compatible SoCs. + + If building for a JZ4725B SoC, you want to say Y here. + config INGENIC_CGU_JZ4770 bool "Ingenic JZ4770 CGU driver" default MACH_JZ4770 diff --git a/drivers/clk/ingenic/Makefile b/drivers/clk/ingenic/Makefile index 8b8dc79c7ce6..00a79b2fba10 100644 --- a/drivers/clk/ingenic/Makefile +++ b/drivers/clk/ingenic/Makefile @@ -1,4 +1,5 @@ obj-$(CONFIG_INGENIC_CGU_COMMON) += cgu.o obj-$(CONFIG_INGENIC_CGU_JZ4740) += jz4740-cgu.o +obj-$(CONFIG_INGENIC_CGU_JZ4725B) += jz4725b-cgu.o obj-$(CONFIG_INGENIC_CGU_JZ4770) += jz4770-cgu.o obj-$(CONFIG_INGENIC_CGU_JZ4780) += jz4780-cgu.o diff --git a/drivers/clk/ingenic/jz4725b-cgu.c b/drivers/clk/ingenic/jz4725b-cgu.c new file mode 100644 index 000000000000..584ff4ff81c7 --- /dev/null +++ b/drivers/clk/ingenic/jz4725b-cgu.c @@ -0,0 +1,225 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Ingenic JZ4725B SoC CGU driver + * + * Copyright (C) 2018 Paul Cercueil + * Author: Paul Cercueil <paul@crapouillou.net> + */ + +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/of.h> +#include <dt-bindings/clock/jz4725b-cgu.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_OPCR 0x24 +#define CGU_REG_I2SCDR 0x60 +#define CGU_REG_LPCDR 0x64 +#define CGU_REG_MSCCDR 0x68 +#define CGU_REG_SSICDR 0x74 +#define CGU_REG_CIMCDR 0x78 + +/* bits within the LCR register */ +#define LCR_SLEEP BIT(0) + +static struct ingenic_cgu *cgu; + +static const s8 pll_od_encoding[4] = { + 0x0, 0x1, -1, 0x3, +}; + +static const struct ingenic_cgu_clk_info jz4725b_cgu_clocks[] = { + + /* External clocks */ + + [JZ4725B_CLK_EXT] = { "ext", CGU_CLK_EXT }, + [JZ4725B_CLK_OSC32K] = { "osc32k", CGU_CLK_EXT }, + + [JZ4725B_CLK_PLL] = { + "pll", CGU_CLK_PLL, + .parents = { JZ4725B_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 */ + + [JZ4725B_CLK_PLL_HALF] = { + "pll half", CGU_CLK_DIV, + .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, + .div = { CGU_REG_CPCCR, 21, 1, 1, -1, -1, -1 }, + }, + + [JZ4725B_CLK_CCLK] = { + "cclk", CGU_CLK_DIV, + .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, + .div = { CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1 }, + }, + + [JZ4725B_CLK_HCLK] = { + "hclk", CGU_CLK_DIV, + .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, + .div = { CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1 }, + }, + + [JZ4725B_CLK_PCLK] = { + "pclk", CGU_CLK_DIV, + .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, + .div = { CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1 }, + }, + + [JZ4725B_CLK_MCLK] = { + "mclk", CGU_CLK_DIV, + .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, + .div = { CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1 }, + }, + + [JZ4725B_CLK_IPU] = { + "ipu", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4725B_CLK_PLL, -1, -1, -1 }, + .div = { CGU_REG_CPCCR, 16, 1, 4, 22, -1, -1 }, + .gate = { CGU_REG_CLKGR, 13 }, + }, + + [JZ4725B_CLK_LCD] = { + "lcd", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4725B_CLK_PLL_HALF, -1, -1, -1 }, + .div = { CGU_REG_LPCDR, 0, 1, 11, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 9 }, + }, + + [JZ4725B_CLK_I2S] = { + "i2s", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4725B_CLK_EXT, JZ4725B_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 }, + }, + + [JZ4725B_CLK_SPI] = { + "spi", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4725B_CLK_EXT, JZ4725B_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 }, + }, + + [JZ4725B_CLK_MMC_MUX] = { + "mmc_mux", CGU_CLK_DIV, + .parents = { JZ4725B_CLK_PLL_HALF, -1, -1, -1 }, + .div = { CGU_REG_MSCCDR, 0, 1, 5, -1, -1, -1 }, + }, + + [JZ4725B_CLK_UDC] = { + "udc", CGU_CLK_MUX | CGU_CLK_DIV, + .parents = { JZ4725B_CLK_EXT, JZ4725B_CLK_PLL_HALF, -1, -1 }, + .mux = { CGU_REG_CPCCR, 29, 1 }, + .div = { CGU_REG_CPCCR, 23, 1, 6, -1, -1, -1 }, + }, + + /* Gate-only clocks */ + + [JZ4725B_CLK_UART] = { + "uart", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_EXT, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 0 }, + }, + + [JZ4725B_CLK_DMA] = { + "dma", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_PCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 12 }, + }, + + [JZ4725B_CLK_ADC] = { + "adc", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_EXT, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 7 }, + }, + + [JZ4725B_CLK_I2C] = { + "i2c", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_EXT, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 3 }, + }, + + [JZ4725B_CLK_AIC] = { + "aic", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_EXT, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 5 }, + }, + + [JZ4725B_CLK_MMC0] = { + "mmc0", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_MMC_MUX, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 6 }, + }, + + [JZ4725B_CLK_MMC1] = { + "mmc1", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_MMC_MUX, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 16 }, + }, + + [JZ4725B_CLK_BCH] = { + "bch", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_MCLK/* not sure */, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 11 }, + }, + + [JZ4725B_CLK_TCU] = { + "tcu", CGU_CLK_GATE, + .parents = { JZ4725B_CLK_EXT/* not sure */, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 1 }, + }, + + [JZ4725B_CLK_EXT512] = { + "ext/512", CGU_CLK_FIXDIV, + .parents = { JZ4725B_CLK_EXT }, + + /* Doc calls it EXT512, but it seems to be /256... */ + .fixdiv = { 256 }, + }, + + [JZ4725B_CLK_RTC] = { + "rtc", CGU_CLK_MUX, + .parents = { JZ4725B_CLK_EXT512, JZ4725B_CLK_OSC32K, -1, -1 }, + .mux = { CGU_REG_OPCR, 2, 1}, + }, +}; + +static void __init jz4725b_cgu_init(struct device_node *np) +{ + int retval; + + cgu = ingenic_cgu_new(jz4725b_cgu_clocks, + ARRAY_SIZE(jz4725b_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(jz4725b_cgu, "ingenic,jz4725b-cgu", jz4725b_cgu_init); |