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alistair23-linux/drivers/clk/spear/spear6xx_clock.c
Linus Torvalds f36fc04e4c The clk framework changes for 4.3 are mostly updates to existing drivers 
and the addition of new clock drivers. Stephen Boyd has also done a lot
 of subsystem-wide driver clean-ups (thanks!). There are also fixes to
 the framework core and changes to better split clock provider drivers
 from clock consumer drivers.
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Merge tag 'clk-for-linus-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux

Pull clk updates from Michael Turquette:
 "The clk framework changes for 4.3 are mostly updates to existing
  drivers and the addition of new clock drivers.  Stephen Boyd has also
  done a lot of subsystem-wide driver clean-ups (thanks!).  There are
  also fixes to the framework core and changes to better split clock
  provider drivers from clock consumer drivers"

* tag 'clk-for-linus-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (227 commits)
  clk: s5pv210: add missing call to samsung_clk_of_add_provider()
  clk: pistachio: correct critical clock list
  clk: pistachio: Fix PLL rate calculation in integer mode
  clk: pistachio: Fix override of clk-pll settings from boot loader
  clk: pistachio: Fix 32bit integer overflows
  clk: tegra: Fix some static checker problems
  clk: qcom: Fix MSM8916 prng clock enable bit
  clk: Add missing header for 'bool' definition to clk-conf.h
  drivers/clk: appropriate __init annotation for const data
  clk: rockchip: register pll mux before pll itself
  clk: add bindings for the Ux500 clocks
  clk/ARM: move Ux500 PRCC bases to the device tree
  clk: remove duplicated code with __clk_set_parent_after
  clk: Convert __clk_get_name(hw->clk) to clk_hw_get_name(hw)
  clk: Constify clk_hw argument to provider APIs
  clk: Hi6220: add stub clock driver
  dt-bindings: clk: Hi6220: Document stub clock driver
  dt-bindings: arm: Hi6220: add doc for SRAM controller
  clk: atlas7: fix pll missed divide NR in fraction mode
  clk: atlas7: fix bit field and its root clk for coresight_tpiu
  ...
2015-08-31 17:26:48 -07:00

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/*
* SPEAr6xx machines clock framework source file
*
* Copyright (C) 2012 ST Microelectronics
* Viresh Kumar <vireshk@kernel.org>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/clkdev.h>
#include <linux/io.h>
#include <linux/spinlock_types.h>
#include "clk.h"
static DEFINE_SPINLOCK(_lock);
#define PLL1_CTR (misc_base + 0x008)
#define PLL1_FRQ (misc_base + 0x00C)
#define PLL2_CTR (misc_base + 0x014)
#define PLL2_FRQ (misc_base + 0x018)
#define PLL_CLK_CFG (misc_base + 0x020)
/* PLL_CLK_CFG register masks */
#define MCTR_CLK_SHIFT 28
#define MCTR_CLK_MASK 3
#define CORE_CLK_CFG (misc_base + 0x024)
/* CORE CLK CFG register masks */
#define HCLK_RATIO_SHIFT 10
#define HCLK_RATIO_MASK 2
#define PCLK_RATIO_SHIFT 8
#define PCLK_RATIO_MASK 2
#define PERIP_CLK_CFG (misc_base + 0x028)
/* PERIP_CLK_CFG register masks */
#define CLCD_CLK_SHIFT 2
#define CLCD_CLK_MASK 2
#define UART_CLK_SHIFT 4
#define UART_CLK_MASK 1
#define FIRDA_CLK_SHIFT 5
#define FIRDA_CLK_MASK 2
#define GPT0_CLK_SHIFT 8
#define GPT1_CLK_SHIFT 10
#define GPT2_CLK_SHIFT 11
#define GPT3_CLK_SHIFT 12
#define GPT_CLK_MASK 1
#define PERIP1_CLK_ENB (misc_base + 0x02C)
/* PERIP1_CLK_ENB register masks */
#define UART0_CLK_ENB 3
#define UART1_CLK_ENB 4
#define SSP0_CLK_ENB 5
#define SSP1_CLK_ENB 6
#define I2C_CLK_ENB 7
#define JPEG_CLK_ENB 8
#define FSMC_CLK_ENB 9
#define FIRDA_CLK_ENB 10
#define GPT2_CLK_ENB 11
#define GPT3_CLK_ENB 12
#define GPIO2_CLK_ENB 13
#define SSP2_CLK_ENB 14
#define ADC_CLK_ENB 15
#define GPT1_CLK_ENB 11
#define RTC_CLK_ENB 17
#define GPIO1_CLK_ENB 18
#define DMA_CLK_ENB 19
#define SMI_CLK_ENB 21
#define CLCD_CLK_ENB 22
#define GMAC_CLK_ENB 23
#define USBD_CLK_ENB 24
#define USBH0_CLK_ENB 25
#define USBH1_CLK_ENB 26
#define PRSC0_CLK_CFG (misc_base + 0x044)
#define PRSC1_CLK_CFG (misc_base + 0x048)
#define PRSC2_CLK_CFG (misc_base + 0x04C)
#define CLCD_CLK_SYNT (misc_base + 0x05C)
#define FIRDA_CLK_SYNT (misc_base + 0x060)
#define UART_CLK_SYNT (misc_base + 0x064)
/* vco rate configuration table, in ascending order of rates */
static struct pll_rate_tbl pll_rtbl[] = {
{.mode = 0, .m = 0x53, .n = 0x0F, .p = 0x1}, /* vco 332 & pll 166 MHz */
{.mode = 0, .m = 0x85, .n = 0x0F, .p = 0x1}, /* vco 532 & pll 266 MHz */
{.mode = 0, .m = 0xA6, .n = 0x0F, .p = 0x1}, /* vco 664 & pll 332 MHz */
};
/* aux rate configuration table, in ascending order of rates */
static struct aux_rate_tbl aux_rtbl[] = {
/* For PLL1 = 332 MHz */
{.xscale = 2, .yscale = 27, .eq = 0}, /* 12.296 MHz */
{.xscale = 2, .yscale = 8, .eq = 0}, /* 41.5 MHz */
{.xscale = 2, .yscale = 4, .eq = 0}, /* 83 MHz */
{.xscale = 1, .yscale = 2, .eq = 1}, /* 166 MHz */
};
static const char *clcd_parents[] = { "pll3_clk", "clcd_syn_gclk", };
static const char *firda_parents[] = { "pll3_clk", "firda_syn_gclk", };
static const char *uart_parents[] = { "pll3_clk", "uart_syn_gclk", };
static const char *gpt0_1_parents[] = { "pll3_clk", "gpt0_1_syn_clk", };
static const char *gpt2_parents[] = { "pll3_clk", "gpt2_syn_clk", };
static const char *gpt3_parents[] = { "pll3_clk", "gpt3_syn_clk", };
static const char *ddr_parents[] = { "ahb_clk", "ahbmult2_clk", "none",
"pll2_clk", };
/* gpt rate configuration table, in ascending order of rates */
static struct gpt_rate_tbl gpt_rtbl[] = {
/* For pll1 = 332 MHz */
{.mscale = 4, .nscale = 0}, /* 41.5 MHz */
{.mscale = 2, .nscale = 0}, /* 55.3 MHz */
{.mscale = 1, .nscale = 0}, /* 83 MHz */
};
void __init spear6xx_clk_init(void __iomem *misc_base)
{
struct clk *clk, *clk1;
clk = clk_register_fixed_rate(NULL, "osc_32k_clk", NULL, CLK_IS_ROOT,
32000);
clk_register_clkdev(clk, "osc_32k_clk", NULL);
clk = clk_register_fixed_rate(NULL, "osc_30m_clk", NULL, CLK_IS_ROOT,
30000000);
clk_register_clkdev(clk, "osc_30m_clk", NULL);
/* clock derived from 32 KHz osc clk */
clk = clk_register_gate(NULL, "rtc_spear", "osc_32k_clk", 0,
PERIP1_CLK_ENB, RTC_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "rtc-spear");
/* clock derived from 30 MHz osc clk */
clk = clk_register_fixed_rate(NULL, "pll3_clk", "osc_24m_clk", 0,
48000000);
clk_register_clkdev(clk, "pll3_clk", NULL);
clk = clk_register_vco_pll("vco1_clk", "pll1_clk", NULL, "osc_30m_clk",
0, PLL1_CTR, PLL1_FRQ, pll_rtbl, ARRAY_SIZE(pll_rtbl),
&_lock, &clk1, NULL);
clk_register_clkdev(clk, "vco1_clk", NULL);
clk_register_clkdev(clk1, "pll1_clk", NULL);
clk = clk_register_vco_pll("vco2_clk", "pll2_clk", NULL, "osc_30m_clk",
0, PLL2_CTR, PLL2_FRQ, pll_rtbl, ARRAY_SIZE(pll_rtbl),
&_lock, &clk1, NULL);
clk_register_clkdev(clk, "vco2_clk", NULL);
clk_register_clkdev(clk1, "pll2_clk", NULL);
clk = clk_register_fixed_factor(NULL, "wdt_clk", "osc_30m_clk", 0, 1,
1);
clk_register_clkdev(clk, NULL, "wdt");
/* clock derived from pll1 clk */
clk = clk_register_fixed_factor(NULL, "cpu_clk", "pll1_clk",
CLK_SET_RATE_PARENT, 1, 1);
clk_register_clkdev(clk, "cpu_clk", NULL);
clk = clk_register_divider(NULL, "ahb_clk", "pll1_clk",
CLK_SET_RATE_PARENT, CORE_CLK_CFG, HCLK_RATIO_SHIFT,
HCLK_RATIO_MASK, 0, &_lock);
clk_register_clkdev(clk, "ahb_clk", NULL);
clk = clk_register_aux("uart_syn_clk", "uart_syn_gclk", "pll1_clk", 0,
UART_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl),
&_lock, &clk1);
clk_register_clkdev(clk, "uart_syn_clk", NULL);
clk_register_clkdev(clk1, "uart_syn_gclk", NULL);
clk = clk_register_mux(NULL, "uart_mclk", uart_parents,
ARRAY_SIZE(uart_parents), CLK_SET_RATE_NO_REPARENT,
PERIP_CLK_CFG, UART_CLK_SHIFT, UART_CLK_MASK, 0,
&_lock);
clk_register_clkdev(clk, "uart_mclk", NULL);
clk = clk_register_gate(NULL, "uart0", "uart_mclk", 0, PERIP1_CLK_ENB,
UART0_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "d0000000.serial");
clk = clk_register_gate(NULL, "uart1", "uart_mclk", 0, PERIP1_CLK_ENB,
UART1_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "d0080000.serial");
clk = clk_register_aux("firda_syn_clk", "firda_syn_gclk", "pll1_clk",
0, FIRDA_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl),
&_lock, &clk1);
clk_register_clkdev(clk, "firda_syn_clk", NULL);
clk_register_clkdev(clk1, "firda_syn_gclk", NULL);
clk = clk_register_mux(NULL, "firda_mclk", firda_parents,
ARRAY_SIZE(firda_parents), CLK_SET_RATE_NO_REPARENT,
PERIP_CLK_CFG, FIRDA_CLK_SHIFT, FIRDA_CLK_MASK, 0,
&_lock);
clk_register_clkdev(clk, "firda_mclk", NULL);
clk = clk_register_gate(NULL, "firda_clk", "firda_mclk", 0,
PERIP1_CLK_ENB, FIRDA_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "firda");
clk = clk_register_aux("clcd_syn_clk", "clcd_syn_gclk", "pll1_clk",
0, CLCD_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl),
&_lock, &clk1);
clk_register_clkdev(clk, "clcd_syn_clk", NULL);
clk_register_clkdev(clk1, "clcd_syn_gclk", NULL);
clk = clk_register_mux(NULL, "clcd_mclk", clcd_parents,
ARRAY_SIZE(clcd_parents), CLK_SET_RATE_NO_REPARENT,
PERIP_CLK_CFG, CLCD_CLK_SHIFT, CLCD_CLK_MASK, 0,
&_lock);
clk_register_clkdev(clk, "clcd_mclk", NULL);
clk = clk_register_gate(NULL, "clcd_clk", "clcd_mclk", 0,
PERIP1_CLK_ENB, CLCD_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "clcd");
/* gpt clocks */
clk = clk_register_gpt("gpt0_1_syn_clk", "pll1_clk", 0, PRSC0_CLK_CFG,
gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock);
clk_register_clkdev(clk, "gpt0_1_syn_clk", NULL);
clk = clk_register_mux(NULL, "gpt0_mclk", gpt0_1_parents,
ARRAY_SIZE(gpt0_1_parents), CLK_SET_RATE_NO_REPARENT,
PERIP_CLK_CFG, GPT0_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock);
clk_register_clkdev(clk, NULL, "gpt0");
clk = clk_register_mux(NULL, "gpt1_mclk", gpt0_1_parents,
ARRAY_SIZE(gpt0_1_parents), CLK_SET_RATE_NO_REPARENT,
PERIP_CLK_CFG, GPT1_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock);
clk_register_clkdev(clk, "gpt1_mclk", NULL);
clk = clk_register_gate(NULL, "gpt1_clk", "gpt1_mclk", 0,
PERIP1_CLK_ENB, GPT1_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "gpt1");
clk = clk_register_gpt("gpt2_syn_clk", "pll1_clk", 0, PRSC1_CLK_CFG,
gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock);
clk_register_clkdev(clk, "gpt2_syn_clk", NULL);
clk = clk_register_mux(NULL, "gpt2_mclk", gpt2_parents,
ARRAY_SIZE(gpt2_parents), CLK_SET_RATE_NO_REPARENT,
PERIP_CLK_CFG, GPT2_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock);
clk_register_clkdev(clk, "gpt2_mclk", NULL);
clk = clk_register_gate(NULL, "gpt2_clk", "gpt2_mclk", 0,
PERIP1_CLK_ENB, GPT2_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "gpt2");
clk = clk_register_gpt("gpt3_syn_clk", "pll1_clk", 0, PRSC2_CLK_CFG,
gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock);
clk_register_clkdev(clk, "gpt3_syn_clk", NULL);
clk = clk_register_mux(NULL, "gpt3_mclk", gpt3_parents,
ARRAY_SIZE(gpt3_parents), CLK_SET_RATE_NO_REPARENT,
PERIP_CLK_CFG, GPT3_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock);
clk_register_clkdev(clk, "gpt3_mclk", NULL);
clk = clk_register_gate(NULL, "gpt3_clk", "gpt3_mclk", 0,
PERIP1_CLK_ENB, GPT3_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "gpt3");
/* clock derived from pll3 clk */
clk = clk_register_gate(NULL, "usbh0_clk", "pll3_clk", 0,
PERIP1_CLK_ENB, USBH0_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "e1800000.ehci");
clk_register_clkdev(clk, NULL, "e1900000.ohci");
clk = clk_register_gate(NULL, "usbh1_clk", "pll3_clk", 0,
PERIP1_CLK_ENB, USBH1_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "e2000000.ehci");
clk_register_clkdev(clk, NULL, "e2100000.ohci");
clk = clk_register_gate(NULL, "usbd_clk", "pll3_clk", 0, PERIP1_CLK_ENB,
USBD_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "designware_udc");
/* clock derived from ahb clk */
clk = clk_register_fixed_factor(NULL, "ahbmult2_clk", "ahb_clk", 0, 2,
1);
clk_register_clkdev(clk, "ahbmult2_clk", NULL);
clk = clk_register_mux(NULL, "ddr_clk", ddr_parents,
ARRAY_SIZE(ddr_parents), CLK_SET_RATE_NO_REPARENT,
PLL_CLK_CFG, MCTR_CLK_SHIFT, MCTR_CLK_MASK, 0, &_lock);
clk_register_clkdev(clk, "ddr_clk", NULL);
clk = clk_register_divider(NULL, "apb_clk", "ahb_clk",
CLK_SET_RATE_PARENT, CORE_CLK_CFG, PCLK_RATIO_SHIFT,
PCLK_RATIO_MASK, 0, &_lock);
clk_register_clkdev(clk, "apb_clk", NULL);
clk = clk_register_gate(NULL, "dma_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
DMA_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "fc400000.dma");
clk = clk_register_gate(NULL, "fsmc_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
FSMC_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "d1800000.flash");
clk = clk_register_gate(NULL, "gmac_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
GMAC_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "e0800000.ethernet");
clk = clk_register_gate(NULL, "i2c_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
I2C_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "d0200000.i2c");
clk = clk_register_gate(NULL, "jpeg_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
JPEG_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "jpeg");
clk = clk_register_gate(NULL, "smi_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
SMI_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "fc000000.flash");
/* clock derived from apb clk */
clk = clk_register_gate(NULL, "adc_clk", "apb_clk", 0, PERIP1_CLK_ENB,
ADC_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "adc");
clk = clk_register_fixed_factor(NULL, "gpio0_clk", "apb_clk", 0, 1, 1);
clk_register_clkdev(clk, NULL, "f0100000.gpio");
clk = clk_register_gate(NULL, "gpio1_clk", "apb_clk", 0, PERIP1_CLK_ENB,
GPIO1_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "fc980000.gpio");
clk = clk_register_gate(NULL, "gpio2_clk", "apb_clk", 0, PERIP1_CLK_ENB,
GPIO2_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "d8100000.gpio");
clk = clk_register_gate(NULL, "ssp0_clk", "apb_clk", 0, PERIP1_CLK_ENB,
SSP0_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "ssp-pl022.0");
clk = clk_register_gate(NULL, "ssp1_clk", "apb_clk", 0, PERIP1_CLK_ENB,
SSP1_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "ssp-pl022.1");
clk = clk_register_gate(NULL, "ssp2_clk", "apb_clk", 0, PERIP1_CLK_ENB,
SSP2_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "ssp-pl022.2");
}
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