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Commit eae0185a authored by Arnd Bergmann's avatar Arnd Bergmann
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Merge branch 'spear/clock' into next/clock 

Viresh Kumar <viresh.kumar@st.com> writes:

 This is rebased over a (merge of Mike's/clk-next & SPEAr's DT) + Russell's
 patch: CLKDEV: provide helpers for common clock framework rebased over them.

* spear/clock:
  SPEAr: Switch to common clock framework
  SPEAr: Call clk_prepare() before calling clk_enable
  SPEAr: clk: Add General Purpose Timer Synthesizer clock
  SPEAr: clk: Add Fractional Synthesizer clock
  SPEAr: clk: Add Auxiliary Synthesizer clock
  SPEAr: clk: Add VCO-PLL Synthesizer clock

Conflicts:
	drivers/clk/Makefile

[Arnd: rebased again without the spear/dt branch]
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
parents 93c6d892 5df33a62
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MAINTAINERS
View file @ eae0185a
......@@ -6334,9 +6334,7 @@ L: spear-devel@list.st.com
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
W: http://www.st.com/spear
S: Maintained
F: arch/arm/mach-spear*/clock.c
F: arch/arm/plat-spear/clock.c
F: arch/arm/plat-spear/include/plat/clock.h
F: drivers/clk/spear/
SPEAR PAD MULTIPLEXING SUPPORT
M: Viresh Kumar <viresh.kumar@st.com>
......
arch/arm/Kconfig
View file @ eae0185a
......@@ -981,6 +981,7 @@ config PLAT_SPEAR
select ARM_AMBA
select ARCH_REQUIRE_GPIOLIB
select CLKDEV_LOOKUP
select COMMON_CLK
select CLKSRC_MMIO
select GENERIC_CLOCKEVENTS
select HAVE_CLK
......
arch/arm/mach-spear3xx/Makefile
View file @ eae0185a
......@@ -3,7 +3,7 @@
#
# common files
obj-y += spear3xx.o clock.o
obj-y += spear3xx.o
# spear300 specific files
obj-$(CONFIG_MACH_SPEAR300) += spear300.o
......
arch/arm/mach-spear3xx/clock.c deleted 100644 → 0
View file @ 93c6d892
This diff is collapsed.
arch/arm/mach-spear3xx/include/mach/generic.h
View file @ eae0185a
......@@ -36,8 +36,8 @@ extern struct amba_device spear3xx_uart_device;
extern struct sys_timer spear3xx_timer;
/* Add spear3xx family function declarations here */
void __init spear3xx_clk_init(void);
void __init spear_setup_timer(void);
void __init spear3xx_clk_init(void);
void __init spear3xx_map_io(void);
void __init spear3xx_init_irq(void);
void __init spear3xx_init(void);
......@@ -156,7 +156,6 @@ extern struct pmx_dev spear310_pmx_tdm0;
/* Add spear310 machine function declarations here */
void __init spear310_init(struct pmx_mode *pmx_mode, struct pmx_dev **pmx_devs,
u8 pmx_dev_count);
#endif /* CONFIG_MACH_SPEAR310 */
/* spear320 declarations */
......
arch/arm/mach-spear3xx/include/mach/misc_regs.h
View file @ eae0185a
......@@ -15,150 +15,8 @@
#define __MACH_MISC_REGS_H
#include <mach/hardware.h>
#include <mach/spear.h>
#define MISC_BASE IOMEM(VA_SPEAR3XX_ICM3_MISC_REG_BASE)
#define SOC_CFG_CTR (MISC_BASE + 0x000)
#define DIAG_CFG_CTR (MISC_BASE + 0x004)
#define PLL1_CTR (MISC_BASE + 0x008)
#define PLL1_FRQ (MISC_BASE + 0x00C)
#define PLL1_MOD (MISC_BASE + 0x010)
#define PLL2_CTR (MISC_BASE + 0x014)
/* PLL_CTR register masks */
#define PLL_ENABLE 2
#define PLL_MODE_SHIFT 4
#define PLL_MODE_MASK 0x3
#define PLL_MODE_NORMAL 0
#define PLL_MODE_FRACTION 1
#define PLL_MODE_DITH_DSB 2
#define PLL_MODE_DITH_SSB 3
#define PLL2_FRQ (MISC_BASE + 0x018)
/* PLL FRQ register masks */
#define PLL_DIV_N_SHIFT 0
#define PLL_DIV_N_MASK 0xFF
#define PLL_DIV_P_SHIFT 8
#define PLL_DIV_P_MASK 0x7
#define PLL_NORM_FDBK_M_SHIFT 24
#define PLL_NORM_FDBK_M_MASK 0xFF
#define PLL_DITH_FDBK_M_SHIFT 16
#define PLL_DITH_FDBK_M_MASK 0xFFFF
#define PLL2_MOD (MISC_BASE + 0x01C)
#define PLL_CLK_CFG (MISC_BASE + 0x020)
#define CORE_CLK_CFG (MISC_BASE + 0x024)
/* CORE CLK CFG register masks */
#define PLL_HCLK_RATIO_SHIFT 10
#define PLL_HCLK_RATIO_MASK 0x3
#define HCLK_PCLK_RATIO_SHIFT 8
#define HCLK_PCLK_RATIO_MASK 0x3
#define PERIP_CLK_CFG (MISC_BASE + 0x028)
/* PERIP_CLK_CFG register masks */
#define UART_CLK_SHIFT 4
#define UART_CLK_MASK 0x1
#define FIRDA_CLK_SHIFT 5
#define FIRDA_CLK_MASK 0x3
#define GPT0_CLK_SHIFT 8
#define GPT1_CLK_SHIFT 11
#define GPT2_CLK_SHIFT 12
#define GPT_CLK_MASK 0x1
#define AUX_CLK_PLL3_VAL 0
#define AUX_CLK_PLL1_VAL 1
#define PERIP1_CLK_ENB (MISC_BASE + 0x02C)
/* PERIP1_CLK_ENB register masks */
#define UART_CLK_ENB 3
#define SSP_CLK_ENB 5
#define I2C_CLK_ENB 7
#define JPEG_CLK_ENB 8
#define FIRDA_CLK_ENB 10
#define GPT1_CLK_ENB 11
#define GPT2_CLK_ENB 12
#define ADC_CLK_ENB 15
#define RTC_CLK_ENB 17
#define GPIO_CLK_ENB 18
#define DMA_CLK_ENB 19
#define SMI_CLK_ENB 21
#define GMAC_CLK_ENB 23
#define USBD_CLK_ENB 24
#define USBH_CLK_ENB 25
#define C3_CLK_ENB 31
#define SOC_CORE_ID (MISC_BASE + 0x030)
#define RAS_CLK_ENB (MISC_BASE + 0x034)
#define PERIP1_SOF_RST (MISC_BASE + 0x038)
/* PERIP1_SOF_RST register masks */
#define JPEG_SOF_RST 8
#define SOC_USER_ID (MISC_BASE + 0x03C)
#define RAS_SOF_RST (MISC_BASE + 0x040)
#define PRSC1_CLK_CFG (MISC_BASE + 0x044)
#define PRSC2_CLK_CFG (MISC_BASE + 0x048)
#define PRSC3_CLK_CFG (MISC_BASE + 0x04C)
/* gpt synthesizer register masks */
#define GPT_MSCALE_SHIFT 0
#define GPT_MSCALE_MASK 0xFFF
#define GPT_NSCALE_SHIFT 12
#define GPT_NSCALE_MASK 0xF
#define AMEM_CLK_CFG (MISC_BASE + 0x050)
#define EXPI_CLK_CFG (MISC_BASE + 0x054)
#define CLCD_CLK_SYNT (MISC_BASE + 0x05C)
#define FIRDA_CLK_SYNT (MISC_BASE + 0x060)
#define UART_CLK_SYNT (MISC_BASE + 0x064)
#define GMAC_CLK_SYNT (MISC_BASE + 0x068)
#define RAS1_CLK_SYNT (MISC_BASE + 0x06C)
#define RAS2_CLK_SYNT (MISC_BASE + 0x070)
#define RAS3_CLK_SYNT (MISC_BASE + 0x074)
#define RAS4_CLK_SYNT (MISC_BASE + 0x078)
/* aux clk synthesiser register masks for irda to ras4 */
#define AUX_SYNT_ENB 31
#define AUX_EQ_SEL_SHIFT 30
#define AUX_EQ_SEL_MASK 1
#define AUX_EQ1_SEL 0
#define AUX_EQ2_SEL 1
#define AUX_XSCALE_SHIFT 16
#define AUX_XSCALE_MASK 0xFFF
#define AUX_YSCALE_SHIFT 0
#define AUX_YSCALE_MASK 0xFFF
#define ICM1_ARB_CFG (MISC_BASE + 0x07C)
#define ICM2_ARB_CFG (MISC_BASE + 0x080)
#define ICM3_ARB_CFG (MISC_BASE + 0x084)
#define ICM4_ARB_CFG (MISC_BASE + 0x088)
#define ICM5_ARB_CFG (MISC_BASE + 0x08C)
#define ICM6_ARB_CFG (MISC_BASE + 0x090)
#define ICM7_ARB_CFG (MISC_BASE + 0x094)
#define ICM8_ARB_CFG (MISC_BASE + 0x098)
#define ICM9_ARB_CFG (MISC_BASE + 0x09C)
#define DMA_CHN_CFG (MISC_BASE + 0x0A0)
#define USB2_PHY_CFG (MISC_BASE + 0x0A4)
#define GMAC_CFG_CTR (MISC_BASE + 0x0A8)
#define EXPI_CFG_CTR (MISC_BASE + 0x0AC)
#define PRC1_LOCK_CTR (MISC_BASE + 0x0C0)
#define PRC2_LOCK_CTR (MISC_BASE + 0x0C4)
#define PRC3_LOCK_CTR (MISC_BASE + 0x0C8)
#define PRC4_LOCK_CTR (MISC_BASE + 0x0CC)
#define PRC1_IRQ_CTR (MISC_BASE + 0x0D0)
#define PRC2_IRQ_CTR (MISC_BASE + 0x0D4)
#define PRC3_IRQ_CTR (MISC_BASE + 0x0D8)
#define PRC4_IRQ_CTR (MISC_BASE + 0x0DC)
#define PWRDOWN_CFG_CTR (MISC_BASE + 0x0E0)
#define COMPSSTL_1V8_CFG (MISC_BASE + 0x0E4)
#define COMPSSTL_2V5_CFG (MISC_BASE + 0x0E8)
#define COMPCOR_3V3_CFG (MISC_BASE + 0x0EC)
#define SSTLPAD_CFG_CTR (MISC_BASE + 0x0F0)
#define BIST1_CFG_CTR (MISC_BASE + 0x0F4)
#define BIST2_CFG_CTR (MISC_BASE + 0x0F8)
#define BIST3_CFG_CTR (MISC_BASE + 0x0FC)
#define BIST4_CFG_CTR (MISC_BASE + 0x100)
#define BIST5_CFG_CTR (MISC_BASE + 0x104)
#define BIST1_STS_RES (MISC_BASE + 0x108)
#define BIST2_STS_RES (MISC_BASE + 0x10C)
#define BIST3_STS_RES (MISC_BASE + 0x110)
#define BIST4_STS_RES (MISC_BASE + 0x114)
#define BIST5_STS_RES (MISC_BASE + 0x118)
#define SYSERR_CFG_CTR (MISC_BASE + 0x11C)
#endif /* __MACH_MISC_REGS_H */
arch/arm/mach-spear3xx/include/mach/spear.h
View file @ eae0185a
......@@ -78,4 +78,17 @@
#define SPEAR_SYS_CTRL_BASE SPEAR3XX_ICM3_SYS_CTRL_BASE
#define VA_SPEAR_SYS_CTRL_BASE VA_SPEAR3XX_ICM3_SYS_CTRL_BASE
/* SPEAr320 Macros */
#define SPEAR320_SOC_CONFIG_BASE UL(0xB3000000)
#define VA_SPEAR320_SOC_CONFIG_BASE UL(0xFE000000)
#define SPEAR320_CONTROL_REG IOMEM(VA_SPEAR320_SOC_CONFIG_BASE)
#define SPEAR320_EXT_CTRL_REG IOMEM(VA_SPEAR320_SOC_CONFIG_BASE + 0x0018)
#define SPEAR320_UARTX_PCLK_MASK 0x1
#define SPEAR320_UART2_PCLK_SHIFT 8
#define SPEAR320_UART3_PCLK_SHIFT 9
#define SPEAR320_UART4_PCLK_SHIFT 10
#define SPEAR320_UART5_PCLK_SHIFT 11
#define SPEAR320_UART6_PCLK_SHIFT 12
#define SPEAR320_RS485_PCLK_SHIFT 13
#endif /* __MACH_SPEAR3XX_H */
arch/arm/mach-spear3xx/spear320.c
View file @ eae0185a
......@@ -16,6 +16,7 @@
#include <plat/shirq.h>
#include <mach/generic.h>
#include <mach/hardware.h>
#include <mach/spear.h>
/* pad multiplexing support */
/* muxing registers */
......
arch/arm/mach-spear3xx/spear3xx.c
View file @ eae0185a
......@@ -511,6 +511,8 @@ static void __init spear3xx_timer_init(void)
char pclk_name[] = "pll3_48m_clk";
struct clk *gpt_clk, *pclk;
spear3xx_clk_init();
/* get the system timer clock */
gpt_clk = clk_get_sys("gpt0", NULL);
if (IS_ERR(gpt_clk)) {
......
arch/arm/mach-spear6xx/Makefile
View file @ eae0185a
......@@ -3,4 +3,4 @@
#
# common files
obj-y += clock.o spear6xx.o
obj-y += spear6xx.o
arch/arm/mach-spear6xx/clock.c deleted 100644 → 0
View file @ 93c6d892
This diff is collapsed.
arch/arm/mach-spear6xx/include/mach/misc_regs.h
View file @ eae0185a
......@@ -15,160 +15,8 @@
#define __MACH_MISC_REGS_H
#include <mach/hardware.h>
#include <mach/spear.h>
#define MISC_BASE IOMEM(VA_SPEAR6XX_ICM3_MISC_REG_BASE)
#define SOC_CFG_CTR (MISC_BASE + 0x000)
#define DIAG_CFG_CTR (MISC_BASE + 0x004)
#define PLL1_CTR (MISC_BASE + 0x008)
#define PLL1_FRQ (MISC_BASE + 0x00C)
#define PLL1_MOD (MISC_BASE + 0x010)
#define PLL2_CTR (MISC_BASE + 0x014)
/* PLL_CTR register masks */
#define PLL_ENABLE 2
#define PLL_MODE_SHIFT 4
#define PLL_MODE_MASK 0x3
#define PLL_MODE_NORMAL 0
#define PLL_MODE_FRACTION 1
#define PLL_MODE_DITH_DSB 2
#define PLL_MODE_DITH_SSB 3
#define PLL2_FRQ (MISC_BASE + 0x018)
/* PLL FRQ register masks */
#define PLL_DIV_N_SHIFT 0
#define PLL_DIV_N_MASK 0xFF
#define PLL_DIV_P_SHIFT 8
#define PLL_DIV_P_MASK 0x7
#define PLL_NORM_FDBK_M_SHIFT 24
#define PLL_NORM_FDBK_M_MASK 0xFF
#define PLL_DITH_FDBK_M_SHIFT 16
#define PLL_DITH_FDBK_M_MASK 0xFFFF
#define PLL2_MOD (MISC_BASE + 0x01C)
#define PLL_CLK_CFG (MISC_BASE + 0x020)
#define CORE_CLK_CFG (MISC_BASE + 0x024)
/* CORE CLK CFG register masks */
#define PLL_HCLK_RATIO_SHIFT 10
#define PLL_HCLK_RATIO_MASK 0x3
#define HCLK_PCLK_RATIO_SHIFT 8
#define HCLK_PCLK_RATIO_MASK 0x3
#define PERIP_CLK_CFG (MISC_BASE + 0x028)
/* PERIP_CLK_CFG register masks */
#define CLCD_CLK_SHIFT 2
#define CLCD_CLK_MASK 0x3
#define UART_CLK_SHIFT 4
#define UART_CLK_MASK 0x1
#define FIRDA_CLK_SHIFT 5
#define FIRDA_CLK_MASK 0x3
#define GPT0_CLK_SHIFT 8
#define GPT1_CLK_SHIFT 10
#define GPT2_CLK_SHIFT 11
#define GPT3_CLK_SHIFT 12
#define GPT_CLK_MASK 0x1
#define AUX_CLK_PLL3_VAL 0
#define AUX_CLK_PLL1_VAL 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 SOC_CORE_ID (MISC_BASE + 0x030)
#define RAS_CLK_ENB (MISC_BASE + 0x034)
#define PERIP1_SOF_RST (MISC_BASE + 0x038)
/* PERIP1_SOF_RST register masks */
#define JPEG_SOF_RST 8
#define SOC_USER_ID (MISC_BASE + 0x03C)
#define RAS_SOF_RST (MISC_BASE + 0x040)
#define PRSC1_CLK_CFG (MISC_BASE + 0x044)
#define PRSC2_CLK_CFG (MISC_BASE + 0x048)
#define PRSC3_CLK_CFG (MISC_BASE + 0x04C)
/* gpt synthesizer register masks */
#define GPT_MSCALE_SHIFT 0
#define GPT_MSCALE_MASK 0xFFF
#define GPT_NSCALE_SHIFT 12
#define GPT_NSCALE_MASK 0xF
#define AMEM_CLK_CFG (MISC_BASE + 0x050)
#define EXPI_CLK_CFG (MISC_BASE + 0x054)
#define CLCD_CLK_SYNT (MISC_BASE + 0x05C)
#define FIRDA_CLK_SYNT (MISC_BASE + 0x060)
#define UART_CLK_SYNT (MISC_BASE + 0x064)
#define GMAC_CLK_SYNT (MISC_BASE + 0x068)
#define RAS1_CLK_SYNT (MISC_BASE + 0x06C)
#define RAS2_CLK_SYNT (MISC_BASE + 0x070)
#define RAS3_CLK_SYNT (MISC_BASE + 0x074)
#define RAS4_CLK_SYNT (MISC_BASE + 0x078)
/* aux clk synthesiser register masks for irda to ras4 */
#define AUX_SYNT_ENB 31
#define AUX_EQ_SEL_SHIFT 30
#define AUX_EQ_SEL_MASK 1
#define AUX_EQ1_SEL 0
#define AUX_EQ2_SEL 1
#define AUX_XSCALE_SHIFT 16
#define AUX_XSCALE_MASK 0xFFF
#define AUX_YSCALE_SHIFT 0
#define AUX_YSCALE_MASK 0xFFF
#define ICM1_ARB_CFG (MISC_BASE + 0x07C)
#define ICM2_ARB_CFG (MISC_BASE + 0x080)
#define ICM3_ARB_CFG (MISC_BASE + 0x084)
#define ICM4_ARB_CFG (MISC_BASE + 0x088)
#define ICM5_ARB_CFG (MISC_BASE + 0x08C)
#define ICM6_ARB_CFG (MISC_BASE + 0x090)
#define ICM7_ARB_CFG (MISC_BASE + 0x094)
#define ICM8_ARB_CFG (MISC_BASE + 0x098)
#define ICM9_ARB_CFG (MISC_BASE + 0x09C)
#define DMA_CHN_CFG (MISC_BASE + 0x0A0)
#define USB2_PHY_CFG (MISC_BASE + 0x0A4)
#define GMAC_CFG_CTR (MISC_BASE + 0x0A8)
#define EXPI_CFG_CTR (MISC_BASE + 0x0AC)
#define PRC1_LOCK_CTR (MISC_BASE + 0x0C0)
#define PRC2_LOCK_CTR (MISC_BASE + 0x0C4)
#define PRC3_LOCK_CTR (MISC_BASE + 0x0C8)
#define PRC4_LOCK_CTR (MISC_BASE + 0x0CC)
#define PRC1_IRQ_CTR (MISC_BASE + 0x0D0)
#define PRC2_IRQ_CTR (MISC_BASE + 0x0D4)
#define PRC3_IRQ_CTR (MISC_BASE + 0x0D8)
#define PRC4_IRQ_CTR (MISC_BASE + 0x0DC)
#define PWRDOWN_CFG_CTR (MISC_BASE + 0x0E0)
#define COMPSSTL_1V8_CFG (MISC_BASE + 0x0E4)
#define COMPSSTL_2V5_CFG (MISC_BASE + 0x0E8)
#define COMPCOR_3V3_CFG (MISC_BASE + 0x0EC)
#define SSTLPAD_CFG_CTR (MISC_BASE + 0x0F0)
#define BIST1_CFG_CTR (MISC_BASE + 0x0F4)
#define BIST2_CFG_CTR (MISC_BASE + 0x0F8)
#define BIST3_CFG_CTR (MISC_BASE + 0x0FC)
#define BIST4_CFG_CTR (MISC_BASE + 0x100)
#define BIST5_CFG_CTR (MISC_BASE + 0x104)
#define BIST1_STS_RES (MISC_BASE + 0x108)
#define BIST2_STS_RES (MISC_BASE + 0x10C)
#define BIST3_STS_RES (MISC_BASE + 0x110)
#define BIST4_STS_RES (MISC_BASE + 0x114)
#define BIST5_STS_RES (MISC_BASE + 0x118)
#define SYSERR_CFG_CTR (MISC_BASE + 0x11C)
#endif /* __MACH_MISC_REGS_H */
arch/arm/mach-spear6xx/spear6xx.c
View file @ eae0185a
......@@ -56,9 +56,6 @@ static struct map_desc spear6xx_io_desc[] __initdata = {
void __init spear6xx_map_io(void)
{
iotable_init(spear6xx_io_desc, ARRAY_SIZE(spear6xx_io_desc));
/* This will initialize clock framework */
spear6xx_clk_init();
}
static void __init spear6xx_timer_init(void)
......@@ -66,6 +63,8 @@ static void __init spear6xx_timer_init(void)
char pclk_name[] = "pll3_48m_clk";
struct clk *gpt_clk, *pclk;
spear6xx_clk_init();
/* get the system timer clock */
gpt_clk = clk_get_sys("gpt0", NULL);
if (IS_ERR(gpt_clk)) {
......
arch/arm/plat-spear/Makefile
View file @ eae0185a
......@@ -3,6 +3,6 @@
#
# Common support
obj-y := clock.o restart.o time.o
obj-y := restart.o time.o
obj-$(CONFIG_ARCH_SPEAR3XX) += shirq.o padmux.o
arch/arm/plat-spear/clock.c deleted 100644 → 0
View file @ 93c6d892
This diff is collapsed.
arch/arm/plat-spear/include/plat/clock.h deleted 100644 → 0
View file @ 93c6d892
/*
* arch/arm/plat-spear/include/plat/clock.h
*
* Clock framework definitions for SPEAr platform
*
* Copyright (C) 2009 ST Microelectronics
* Viresh Kumar<viresh.kumar@st.com>
*
* 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.
*/
#ifndef __PLAT_CLOCK_H
#define __PLAT_CLOCK_H
#include <linux/list.h>
#include <linux/clkdev.h>
#include <linux/types.h>
/* clk structure flags */
#define ALWAYS_ENABLED (1 << 0) /* clock always enabled */
#define RESET_TO_ENABLE (1 << 1) /* reset register bit to enable clk */
#define ENABLED_ON_INIT (1 << 2) /* clocks enabled at init */
/**
* struct clkops - clock operations
* @enable: pointer to clock enable function
* @disable: pointer to clock disable function
*/
struct clkops {
int (*enable) (struct clk *);
void (*disable) (struct clk *);
};
/**
* struct pclk_info - parents info
* @pclk: pointer to parent clk
* @pclk_val: value to be written for selecting this parent
*/
struct pclk_info {
struct clk *pclk;
u8 pclk_val;
};
/**
* struct pclk_sel - parents selection configuration
* @pclk_info: pointer to array of parent clock info
* @pclk_count: number of parents
* @pclk_sel_reg: register for selecting a parent
* @pclk_sel_mask: mask for selecting parent (can be used to clear bits also)
*/
struct pclk_sel {
struct pclk_info *pclk_info;
u8 pclk_count;
void __iomem *pclk_sel_reg;
unsigned int pclk_sel_mask;
};
/**
* struct rate_config - clk rate configurations
* @tbls: array of device specific clk rate tables, in ascending order of rates
* @count: size of tbls array
* @default_index: default setting when originally disabled
*/
struct rate_config {
void *tbls;
u8 count;
u8 default_index;
};
/**
* struct clk - clock structure
* @usage_count: num of users who enabled this clock
* @flags: flags for clock properties
* @rate: programmed clock rate in Hz
* @en_reg: clk enable/disable reg
* @en_reg_bit: clk enable/disable bit
* @ops: clk enable/disable ops - generic_clkops selected if NULL
* @recalc: pointer to clock rate recalculate function
* @set_rate: pointer to clock set rate function
* @calc_rate: pointer to clock get rate function for index
* @rate_config: rate configuration information, used by set_rate
* @div_factor: division factor to parent clock.
* @pclk: current parent clk
* @pclk_sel: pointer to parent selection structure
* @pclk_sel_shift: register shift for selecting parent of this clock
* @children: list for childrens or this clock
* @sibling: node for list of clocks having same parents
* @private_data: clock specific private data
* @node: list to maintain clocks linearly
* @cl: clocklook up associated with this clock
* @dent: object for debugfs
*/
struct clk {
unsigned int usage_count;
unsigned int flags;
unsigned long rate;
void __iomem *en_reg;
u8 en_reg_bit;
const struct clkops *ops;
int (*recalc) (struct clk *);
int (*set_rate) (struct clk *, unsigned long rate);
unsigned long (*calc_rate)(struct clk *, int index);
struct rate_config rate_config;
unsigned int div_factor;
struct clk *pclk;
struct pclk_sel *pclk_sel;
unsigned int pclk_sel_shift;
struct list_head children;
struct list_head sibling;
void *private_data;
#ifdef CONFIG_DEBUG_FS
struct list_head node;
struct clk_lookup *cl;
struct dentry *dent;
#endif
};
/* pll configuration structure */
struct pll_clk_masks {
u32 mode_mask;
u32 mode_shift;
u32 norm_fdbk_m_mask;
u32 norm_fdbk_m_shift;
u32 dith_fdbk_m_mask;
u32 dith_fdbk_m_shift;
u32 div_p_mask;
u32 div_p_shift;
u32 div_n_mask;
u32 div_n_shift;
};
struct pll_clk_config {
void __iomem *mode_reg;
void __iomem *cfg_reg;
struct pll_clk_masks *masks;
};
/* pll clk rate config structure */
struct pll_rate_tbl {
u8 mode;
u16 m;
u8 n;
u8 p;
};
/* ahb and apb bus configuration structure */
struct bus_clk_masks {
u32 mask;
u32 shift;
};
struct bus_clk_config {
void __iomem *reg;
struct bus_clk_masks *masks;
};
/* ahb and apb clk bus rate config structure */
struct bus_rate_tbl {
u8 div;
};
/* Aux clk configuration structure: applicable to UART and FIRDA */
struct aux_clk_masks {
u32 eq_sel_mask;
u32 eq_sel_shift;
u32 eq1_mask;
u32 eq2_mask;
u32 xscale_sel_mask;
u32 xscale_sel_shift;
u32 yscale_sel_mask;
u32 yscale_sel_shift;
};
struct aux_clk_config {
void __iomem *synth_reg;
struct aux_clk_masks *masks;
};
/* aux clk rate config structure */
struct aux_rate_tbl {
u16 xscale;
u16 yscale;
u8 eq;
};
/* GPT clk configuration structure */
struct gpt_clk_masks {
u32 mscale_sel_mask;
u32 mscale_sel_shift;
u32 nscale_sel_mask;
u32 nscale_sel_shift;
};
struct gpt_clk_config {
void __iomem *synth_reg;
struct gpt_clk_masks *masks;
};
/* gpt clk rate config structure */
struct gpt_rate_tbl {
u16 mscale;
u16 nscale;
};
/* clcd clk configuration structure */
struct clcd_synth_masks {
u32 div_factor_mask;
u32 div_factor_shift;
};
struct clcd_clk_config {
void __iomem *synth_reg;
struct clcd_synth_masks *masks;
};
/* clcd clk rate config structure */
struct clcd_rate_tbl {
u16 div;
};
/* platform specific clock functions */
void __init clk_init(void);
void clk_register(struct clk_lookup *cl);
void recalc_root_clocks(void);
/* clock recalc & set rate functions */
int follow_parent(struct clk *clk);
unsigned long pll_calc_rate(struct clk *clk, int index);
int pll_clk_recalc(struct clk *clk);
int pll_clk_set_rate(struct clk *clk, unsigned long desired_rate);
unsigned long bus_calc_rate(struct clk *clk, int index);
int bus_clk_recalc(struct clk *clk);
int bus_clk_set_rate(struct clk *clk, unsigned long desired_rate);
unsigned long gpt_calc_rate(struct clk *clk, int index);
int gpt_clk_recalc(struct clk *clk);
int gpt_clk_set_rate(struct clk *clk, unsigned long desired_rate);
unsigned long aux_calc_rate(struct clk *clk, int index);
int aux_clk_recalc(struct clk *clk);
int aux_clk_set_rate(struct clk *clk, unsigned long desired_rate);
unsigned long clcd_calc_rate(struct clk *clk, int index);
int clcd_clk_recalc(struct clk *clk);
int clcd_clk_set_rate(struct clk *clk, unsigned long desired_rate);
#endif /* __PLAT_CLOCK_H */
arch/arm/plat-spear/time.c
View file @ eae0185a
......@@ -219,10 +219,10 @@ void __init spear_setup_timer(void)
goto err_iomap;
}
ret = clk_enable(gpt_clk);
ret = clk_prepare_enable(gpt_clk);
if (ret < 0) {
pr_err("%s:couldn't enable gpt clock\n", __func__);
goto err_clk;
pr_err("%s:couldn't prepare-enable gpt clock\n", __func__);
goto err_prepare_enable_clk;
}
spear_clockevent_init();
......@@ -230,7 +230,7 @@ void __init spear_setup_timer(void)
return;
err_clk:
err_prepare_enable_clk:
clk_put(gpt_clk);
err_iomap:
iounmap(gpt_base);
......
drivers/clk/Makefile
View file @ eae0185a
......@@ -2,5 +2,6 @@
obj-$(CONFIG_CLKDEV_LOOKUP) += clkdev.o
obj-$(CONFIG_COMMON_CLK) += clk.o clk-fixed-rate.o clk-gate.o \
clk-mux.o clk-divider.o clk-fixed-factor.o
# SoCs specific
obj-$(CONFIG_ARCH_MXS) += mxs/
obj-$(CONFIG_PLAT_SPEAR) += spear/
drivers/clk/spear/Makefile 0 → 100644
View file @ eae0185a
#
# SPEAr Clock specific Makefile
#
obj-y += clk.o clk-aux-synth.o clk-frac-synth.o clk-gpt-synth.o clk-vco-pll.o
obj-$(CONFIG_ARCH_SPEAR3XX) += spear3xx_clock.o
obj-$(CONFIG_ARCH_SPEAR6XX) += spear6xx_clock.o
drivers/clk/spear/clk-aux-synth.c 0 → 100644
View file @ eae0185a
/*
* Copyright (C) 2012 ST Microelectronics
* Viresh Kumar <viresh.kumar@st.com>
*
* 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.
*
* Auxiliary Synthesizer clock implementation
*/
#define pr_fmt(fmt) "clk-aux-synth: " fmt
#include <linux/clk-provider.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/err.h>
#include "clk.h"
/*
* DOC: Auxiliary Synthesizer clock
*
* Aux synth gives rate for different values of eq, x and y
*
* Fout from synthesizer can be given from two equations:
* Fout1 = (Fin * X/Y)/2 EQ1
* Fout2 = Fin * X/Y EQ2
*/
#define to_clk_aux(_hw) container_of(_hw, struct clk_aux, hw)
static struct aux_clk_masks default_aux_masks = {
.eq_sel_mask = AUX_EQ_SEL_MASK,
.eq_sel_shift = AUX_EQ_SEL_SHIFT,
.eq1_mask = AUX_EQ1_SEL,
.eq2_mask = AUX_EQ2_SEL,
.xscale_sel_mask = AUX_XSCALE_MASK,
.xscale_sel_shift = AUX_XSCALE_SHIFT,
.yscale_sel_mask = AUX_YSCALE_MASK,
.yscale_sel_shift = AUX_YSCALE_SHIFT,
.enable_bit = AUX_SYNT_ENB,
};
static unsigned long aux_calc_rate(struct clk_hw *hw, unsigned long prate,
int index)
{
struct clk_aux *aux = to_clk_aux(hw);
struct aux_rate_tbl *rtbl = aux->rtbl;
u8 eq = rtbl[index].eq ? 1 : 2;
return (((prate / 10000) * rtbl[index].xscale) /
(rtbl[index].yscale * eq)) * 10000;
}
static long clk_aux_round_rate(struct clk_hw *hw, unsigned long drate,
unsigned long *prate)
{
struct clk_aux *aux = to_clk_aux(hw);
int unused;
return clk_round_rate_index(hw, drate, *prate, aux_calc_rate,
aux->rtbl_cnt, &unused);
}
static unsigned long clk_aux_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct clk_aux *aux = to_clk_aux(hw);
unsigned int num = 1, den = 1, val, eqn;
unsigned long flags = 0;
if (aux->lock)
spin_lock_irqsave(aux->lock, flags);
val = readl_relaxed(aux->reg);
if (aux->lock)
spin_unlock_irqrestore(aux->lock, flags);
eqn = (val >> aux->masks->eq_sel_shift) & aux->masks->eq_sel_mask;
if (eqn == aux->masks->eq1_mask)
den = 2;
/* calculate numerator */
num = (val >> aux->masks->xscale_sel_shift) &
aux->masks->xscale_sel_mask;
/* calculate denominator */
den *= (val >> aux->masks->yscale_sel_shift) &
aux->masks->yscale_sel_mask;
if (!den)
return 0;
return (((parent_rate / 10000) * num) / den) * 10000;
}
/* Configures new clock rate of aux */
static int clk_aux_set_rate(struct clk_hw *hw, unsigned long drate,
unsigned long prate)
{
struct clk_aux *aux = to_clk_aux(hw);
struct aux_rate_tbl *rtbl = aux->rtbl;
unsigned long val, flags = 0;
int i;
clk_round_rate_index(hw, drate, prate, aux_calc_rate, aux->rtbl_cnt,
&i);
if (aux->lock)
spin_lock_irqsave(aux->lock, flags);
val = readl_relaxed(aux->reg) &
~(aux->masks->eq_sel_mask << aux->masks->eq_sel_shift);
val |= (rtbl[i].eq & aux->masks->eq_sel_mask) <<
aux->masks->eq_sel_shift;
val &= ~(aux->masks->xscale_sel_mask << aux->masks->xscale_sel_shift);
val |= (rtbl[i].xscale & aux->masks->xscale_sel_mask) <<
aux->masks->xscale_sel_shift;
val &= ~(aux->masks->yscale_sel_mask << aux->masks->yscale_sel_shift);
val |= (rtbl[i].yscale & aux->masks->yscale_sel_mask) <<
aux->masks->yscale_sel_shift;
writel_relaxed(val, aux->reg);
if (aux->lock)
spin_unlock_irqrestore(aux->lock, flags);
return 0;
}
static struct clk_ops clk_aux_ops = {
.recalc_rate = clk_aux_recalc_rate,
.round_rate = clk_aux_round_rate,
.set_rate = clk_aux_set_rate,
};
struct clk *clk_register_aux(const char *aux_name, const char *gate_name,
const char *parent_name, unsigned long flags, void __iomem *reg,
struct aux_clk_masks *masks, struct aux_rate_tbl *rtbl,
u8 rtbl_cnt, spinlock_t *lock, struct clk **gate_clk)
{
struct clk_aux *aux;
struct clk_init_data init;
struct clk *clk;
if (!aux_name || !parent_name || !reg || !rtbl || !rtbl_cnt) {
pr_err("Invalid arguments passed");
return ERR_PTR(-EINVAL);
}
aux = kzalloc(sizeof(*aux), GFP_KERNEL);
if (!aux) {
pr_err("could not allocate aux clk\n");
return ERR_PTR(-ENOMEM);
}
/* struct clk_aux assignments */
if (!masks)
aux->masks = &default_aux_masks;
else
aux->masks = masks;
aux->reg = reg;
aux->rtbl = rtbl;
aux->rtbl_cnt = rtbl_cnt;
aux->lock = lock;
aux->hw.init = &init;
init.name = aux_name;
init.ops = &clk_aux_ops;
init.flags = flags;
init.parent_names = &parent_name;
init.num_parents = 1;
clk = clk_register(NULL, &aux->hw);
if (IS_ERR_OR_NULL(clk))
goto free_aux;
if (gate_name) {
struct clk *tgate_clk;
tgate_clk = clk_register_gate(NULL, gate_name, aux_name, 0, reg,
aux->masks->enable_bit, 0, lock);
if (IS_ERR_OR_NULL(tgate_clk))
goto free_aux;
if (gate_clk)
*gate_clk = tgate_clk;
}
return clk;
free_aux:
kfree(aux);
pr_err("clk register failed\n");
return NULL;
}
drivers/clk/spear/clk-frac-synth.c 0 → 100644
View file @ eae0185a
/*
* Copyright (C) 2012 ST Microelectronics
* Viresh Kumar <viresh.kumar@st.com>
*
* 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.
*
* Fractional Synthesizer clock implementation
*/
#define pr_fmt(fmt) "clk-frac-synth: " fmt
#include <linux/clk-provider.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/err.h>
#include "clk.h"
#define DIV_FACTOR_MASK 0x1FFFF
/*
* DOC: Fractional Synthesizer clock
*
* Fout from synthesizer can be given from below equation:
*
* Fout= Fin/2*div (division factor)
* div is 17 bits:-
* 0-13 (fractional part)
* 14-16 (integer part)
* div is (16-14 bits).(13-0 bits) (in binary)
*
* Fout = Fin/(2 * div)
* Fout = ((Fin / 10000)/(2 * div)) * 10000
* Fout = (2^14 * (Fin / 10000)/(2^14 * (2 * div))) * 10000
* Fout = (((Fin / 10000) << 14)/(2 * (div << 14))) * 10000
*
* div << 14 simply 17 bit value written at register.
* Max error due to scaling down by 10000 is 10 KHz
*/
#define to_clk_frac(_hw) container_of(_hw, struct clk_frac, hw)
static unsigned long frac_calc_rate(struct clk_hw *hw, unsigned long prate,
int index)
{
struct clk_frac *frac = to_clk_frac(hw);
struct frac_rate_tbl *rtbl = frac->rtbl;
prate /= 10000;
prate <<= 14;
prate /= (2 * rtbl[index].div);
prate *= 10000;
return prate;
}
static long clk_frac_round_rate(struct clk_hw *hw, unsigned long drate,
unsigned long *prate)
{
struct clk_frac *frac = to_clk_frac(hw);
int unused;
return clk_round_rate_index(hw, drate, *prate, frac_calc_rate,
frac->rtbl_cnt, &unused);
}
static unsigned long clk_frac_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct clk_frac *frac = to_clk_frac(hw);
unsigned long flags = 0;
unsigned int div = 1, val;
if (frac->lock)
spin_lock_irqsave(frac->lock, flags);
val = readl_relaxed(frac->reg);
if (frac->lock)
spin_unlock_irqrestore(frac->lock, flags);
div = val & DIV_FACTOR_MASK;
if (!div)
return 0;
parent_rate = parent_rate / 10000;
parent_rate = (parent_rate << 14) / (2 * div);
return parent_rate * 10000;
}
/* Configures new clock rate of frac */
static int clk_frac_set_rate(struct clk_hw *hw, unsigned long drate,
unsigned long prate)
{
struct clk_frac *frac = to_clk_frac(hw);
struct frac_rate_tbl *rtbl = frac->rtbl;
unsigned long flags = 0, val;
int i;
clk_round_rate_index(hw, drate, prate, frac_calc_rate, frac->rtbl_cnt,
&i);
if (frac->lock)
spin_lock_irqsave(frac->lock, flags);
val = readl_relaxed(frac->reg) & ~DIV_FACTOR_MASK;
val |= rtbl[i].div & DIV_FACTOR_MASK;
writel_relaxed(val, frac->reg);
if (frac->lock)
spin_unlock_irqrestore(frac->lock, flags);
return 0;
}
struct clk_ops clk_frac_ops = {
.recalc_rate = clk_frac_recalc_rate,
.round_rate = clk_frac_round_rate,
.set_rate = clk_frac_set_rate,
};
struct clk *clk_register_frac(const char *name, const char *parent_name,
unsigned long flags, void __iomem *reg,
struct frac_rate_tbl *rtbl, u8 rtbl_cnt, spinlock_t *lock)
{
struct clk_init_data init;
struct clk_frac *frac;
struct clk *clk;
if (!name || !parent_name || !reg || !rtbl || !rtbl_cnt) {
pr_err("Invalid arguments passed");
return ERR_PTR(-EINVAL);
}
frac = kzalloc(sizeof(*frac), GFP_KERNEL);
if (!frac) {
pr_err("could not allocate frac clk\n");
return ERR_PTR(-ENOMEM);
}
/* struct clk_frac assignments */
frac->reg = reg;
frac->rtbl = rtbl;
frac->rtbl_cnt = rtbl_cnt;
frac->lock = lock;
frac->hw.init = &init;
init.name = name;
init.ops = &clk_frac_ops;
init.flags = flags;
init.parent_names = &parent_name;
init.num_parents = 1;
clk = clk_register(NULL, &frac->hw);
if (!IS_ERR_OR_NULL(clk))
return clk;
pr_err("clk register failed\n");
kfree(frac);
return NULL;
}
drivers/clk/spear/clk-gpt-synth.c 0 → 100644
View file @ eae0185a
/*
* Copyright (C) 2012 ST Microelectronics
* Viresh Kumar <viresh.kumar@st.com>
*
* 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.
*
* General Purpose Timer Synthesizer clock implementation
*/
#define pr_fmt(fmt) "clk-gpt-synth: " fmt
#include <linux/clk-provider.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/err.h>
#include "clk.h"
#define GPT_MSCALE_MASK 0xFFF
#define GPT_NSCALE_SHIFT 12
#define GPT_NSCALE_MASK 0xF
/*
* DOC: General Purpose Timer Synthesizer clock
*
* Calculates gpt synth clk rate for different values of mscale and nscale
*
* Fout= Fin/((2 ^ (N+1)) * (M+1))
*/
#define to_clk_gpt(_hw) container_of(_hw, struct clk_gpt, hw)
static unsigned long gpt_calc_rate(struct clk_hw *hw, unsigned long prate,
int index)
{
struct clk_gpt *gpt = to_clk_gpt(hw);
struct gpt_rate_tbl *rtbl = gpt->rtbl;
prate /= ((1 << (rtbl[index].nscale + 1)) * (rtbl[index].mscale + 1));
return prate;
}
static long clk_gpt_round_rate(struct clk_hw *hw, unsigned long drate,
unsigned long *prate)
{
struct clk_gpt *gpt = to_clk_gpt(hw);
int unused;
return clk_round_rate_index(hw, drate, *prate, gpt_calc_rate,
gpt->rtbl_cnt, &unused);
}
static unsigned long clk_gpt_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct clk_gpt *gpt = to_clk_gpt(hw);
unsigned long flags = 0;
unsigned int div = 1, val;
if (gpt->lock)
spin_lock_irqsave(gpt->lock, flags);
val = readl_relaxed(gpt->reg);
if (gpt->lock)
spin_unlock_irqrestore(gpt->lock, flags);
div += val & GPT_MSCALE_MASK;
div *= 1 << (((val >> GPT_NSCALE_SHIFT) & GPT_NSCALE_MASK) + 1);
if (!div)
return 0;
return parent_rate / div;
}
/* Configures new clock rate of gpt */
static int clk_gpt_set_rate(struct clk_hw *hw, unsigned long drate,
unsigned long prate)
{
struct clk_gpt *gpt = to_clk_gpt(hw);
struct gpt_rate_tbl *rtbl = gpt->rtbl;
unsigned long flags = 0, val;
int i;
clk_round_rate_index(hw, drate, prate, gpt_calc_rate, gpt->rtbl_cnt,
&i);
if (gpt->lock)
spin_lock_irqsave(gpt->lock, flags);
val = readl(gpt->reg) & ~GPT_MSCALE_MASK;
val &= ~(GPT_NSCALE_MASK << GPT_NSCALE_SHIFT);
val |= rtbl[i].mscale & GPT_MSCALE_MASK;
val |= (rtbl[i].nscale & GPT_NSCALE_MASK) << GPT_NSCALE_SHIFT;
writel_relaxed(val, gpt->reg);
if (gpt->lock)
spin_unlock_irqrestore(gpt->lock, flags);
return 0;
}
static struct clk_ops clk_gpt_ops = {
.recalc_rate = clk_gpt_recalc_rate,
.round_rate = clk_gpt_round_rate,
.set_rate = clk_gpt_set_rate,
};
struct clk *clk_register_gpt(const char *name, const char *parent_name, unsigned
long flags, void __iomem *reg, struct gpt_rate_tbl *rtbl, u8
rtbl_cnt, spinlock_t *lock)
{
struct clk_init_data init;
struct clk_gpt *gpt;
struct clk *clk;
if (!name || !parent_name || !reg || !rtbl || !rtbl_cnt) {
pr_err("Invalid arguments passed");
return ERR_PTR(-EINVAL);
}
gpt = kzalloc(sizeof(*gpt), GFP_KERNEL);
if (!gpt) {
pr_err("could not allocate gpt clk\n");
return ERR_PTR(-ENOMEM);
}
/* struct clk_gpt assignments */
gpt->reg = reg;
gpt->rtbl = rtbl;
gpt->rtbl_cnt = rtbl_cnt;
gpt->lock = lock;
gpt->hw.init = &init;
init.name = name;
init.ops = &clk_gpt_ops;
init.flags = flags;
init.parent_names = &parent_name;
init.num_parents = 1;
clk = clk_register(NULL, &gpt->hw);
if (!IS_ERR_OR_NULL(clk))
return clk;
pr_err("clk register failed\n");
kfree(gpt);
return NULL;
}
drivers/clk/spear/clk-vco-pll.c 0 → 100644
View file @ eae0185a
/*
* Copyright (C) 2012 ST Microelectronics
* Viresh Kumar <viresh.kumar@st.com>
*
* 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.
*
* VCO-PLL clock implementation
*/
#define pr_fmt(fmt) "clk-vco-pll: " fmt
#include <linux/clk-provider.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/err.h>
#include "clk.h"
/*
* DOC: VCO-PLL clock
*
* VCO and PLL rate are derived from following equations:
*
* In normal mode
* vco = (2 * M[15:8] * Fin)/N
*
* In Dithered mode
* vco = (2 * M[15:0] * Fin)/(256 * N)
*
* pll_rate = pll/2^p
*
* vco and pll are very closely bound to each other, "vco needs to program:
* mode, m & n" and "pll needs to program p", both share common enable/disable
* logic.
*
* clk_register_vco_pll() registers instances of both vco & pll.
* CLK_SET_RATE_PARENT flag is forced for pll, as it will always pass its
* set_rate to vco. A single rate table exists for both the clocks, which
* configures m, n and p.
*/
/* PLL_CTR register masks */
#define PLL_MODE_NORMAL 0
#define PLL_MODE_FRACTION 1
#define PLL_MODE_DITH_DSM 2
#define PLL_MODE_DITH_SSM 3
#define PLL_MODE_MASK 3
#define PLL_MODE_SHIFT 3
#define PLL_ENABLE 2
#define PLL_LOCK_SHIFT 0
#define PLL_LOCK_MASK 1
/* PLL FRQ register masks */
#define PLL_NORM_FDBK_M_MASK 0xFF
#define PLL_NORM_FDBK_M_SHIFT 24
#define PLL_DITH_FDBK_M_MASK 0xFFFF
#define PLL_DITH_FDBK_M_SHIFT 16
#define PLL_DIV_P_MASK 0x7
#define PLL_DIV_P_SHIFT 8
#define PLL_DIV_N_MASK 0xFF
#define PLL_DIV_N_SHIFT 0
#define to_clk_vco(_hw) container_of(_hw, struct clk_vco, hw)
#define to_clk_pll(_hw) container_of(_hw, struct clk_pll, hw)
/* Calculates pll clk rate for specific value of mode, m, n and p */
static unsigned long pll_calc_rate(struct pll_rate_tbl *rtbl,
unsigned long prate, int index, unsigned long *pll_rate)
{
unsigned long rate = prate;
unsigned int mode;
mode = rtbl[index].mode ? 256 : 1;
rate = (((2 * rate / 10000) * rtbl[index].m) / (mode * rtbl[index].n));
if (pll_rate)
*pll_rate = (rate / (1 << rtbl[index].p)) * 10000;
return rate * 10000;
}
static long clk_pll_round_rate_index(struct clk_hw *hw, unsigned long drate,
unsigned long *prate, int *index)
{
struct clk_pll *pll = to_clk_pll(hw);
unsigned long prev_rate, vco_prev_rate, rate = 0;
unsigned long vco_parent_rate =
__clk_get_rate(__clk_get_parent(__clk_get_parent(hw->clk)));
if (!prate) {
pr_err("%s: prate is must for pll clk\n", __func__);
return -EINVAL;
}
for (*index = 0; *index < pll->vco->rtbl_cnt; (*index)++) {
prev_rate = rate;
vco_prev_rate = *prate;
*prate = pll_calc_rate(pll->vco->rtbl, vco_parent_rate, *index,
&rate);
if (drate < rate) {
/* previous clock was best */
if (*index) {
rate = prev_rate;
*prate = vco_prev_rate;
(*index)--;
}
break;
}
}
return rate;
}
static long clk_pll_round_rate(struct clk_hw *hw, unsigned long drate,
unsigned long *prate)
{
int unused;
return clk_pll_round_rate_index(hw, drate, prate, &unused);
}
static unsigned long clk_pll_recalc_rate(struct clk_hw *hw, unsigned long
parent_rate)
{
struct clk_pll *pll = to_clk_pll(hw);
unsigned long flags = 0;
unsigned int p;
if (pll->vco->lock)
spin_lock_irqsave(pll->vco->lock, flags);
p = readl_relaxed(pll->vco->cfg_reg);
if (pll->vco->lock)
spin_unlock_irqrestore(pll->vco->lock, flags);
p = (p >> PLL_DIV_P_SHIFT) & PLL_DIV_P_MASK;
return parent_rate / (1 << p);
}
static int clk_pll_set_rate(struct clk_hw *hw, unsigned long drate,
unsigned long prate)
{
struct clk_pll *pll = to_clk_pll(hw);
struct pll_rate_tbl *rtbl = pll->vco->rtbl;
unsigned long flags = 0, val;
int i;
clk_pll_round_rate_index(hw, drate, NULL, &i);
if (pll->vco->lock)
spin_lock_irqsave(pll->vco->lock, flags);
val = readl_relaxed(pll->vco->cfg_reg);
val &= ~(PLL_DIV_P_MASK << PLL_DIV_P_SHIFT);
val |= (rtbl[i].p & PLL_DIV_P_MASK) << PLL_DIV_P_SHIFT;
writel_relaxed(val, pll->vco->cfg_reg);
if (pll->vco->lock)
spin_unlock_irqrestore(pll->vco->lock, flags);
return 0;
}
static struct clk_ops clk_pll_ops = {
.recalc_rate = clk_pll_recalc_rate,
.round_rate = clk_pll_round_rate,
.set_rate = clk_pll_set_rate,
};
static inline unsigned long vco_calc_rate(struct clk_hw *hw,
unsigned long prate, int index)
{
struct clk_vco *vco = to_clk_vco(hw);
return pll_calc_rate(vco->rtbl, prate, index, NULL);
}
static long clk_vco_round_rate(struct clk_hw *hw, unsigned long drate,
unsigned long *prate)
{
struct clk_vco *vco = to_clk_vco(hw);
int unused;
return clk_round_rate_index(hw, drate, *prate, vco_calc_rate,
vco->rtbl_cnt, &unused);
}
static unsigned long clk_vco_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct clk_vco *vco = to_clk_vco(hw);
unsigned long flags = 0;
unsigned int num = 2, den = 0, val, mode = 0;
if (vco->lock)
spin_lock_irqsave(vco->lock, flags);
mode = (readl_relaxed(vco->mode_reg) >> PLL_MODE_SHIFT) & PLL_MODE_MASK;
val = readl_relaxed(vco->cfg_reg);
if (vco->lock)
spin_unlock_irqrestore(vco->lock, flags);
den = (val >> PLL_DIV_N_SHIFT) & PLL_DIV_N_MASK;
/* calculate numerator & denominator */
if (!mode) {
/* Normal mode */
num *= (val >> PLL_NORM_FDBK_M_SHIFT) & PLL_NORM_FDBK_M_MASK;
} else {
/* Dithered mode */
num *= (val >> PLL_DITH_FDBK_M_SHIFT) & PLL_DITH_FDBK_M_MASK;
den *= 256;
}
if (!den) {
WARN(1, "%s: denominator can't be zero\n", __func__);
return 0;
}
return (((parent_rate / 10000) * num) / den) * 10000;
}
/* Configures new clock rate of vco */
static int clk_vco_set_rate(struct clk_hw *hw, unsigned long drate,
unsigned long prate)
{
struct clk_vco *vco = to_clk_vco(hw);
struct pll_rate_tbl *rtbl = vco->rtbl;
unsigned long flags = 0, val;
int i;
clk_round_rate_index(hw, drate, prate, vco_calc_rate, vco->rtbl_cnt,
&i);
if (vco->lock)
spin_lock_irqsave(vco->lock, flags);
val = readl_relaxed(vco->mode_reg);
val &= ~(PLL_MODE_MASK << PLL_MODE_SHIFT);
val |= (rtbl[i].mode & PLL_MODE_MASK) << PLL_MODE_SHIFT;
writel_relaxed(val, vco->mode_reg);
val = readl_relaxed(vco->cfg_reg);
val &= ~(PLL_DIV_N_MASK << PLL_DIV_N_SHIFT);
val |= (rtbl[i].n & PLL_DIV_N_MASK) << PLL_DIV_N_SHIFT;
val &= ~(PLL_DITH_FDBK_M_MASK << PLL_DITH_FDBK_M_SHIFT);
if (rtbl[i].mode)
val |= (rtbl[i].m & PLL_DITH_FDBK_M_MASK) <<
PLL_DITH_FDBK_M_SHIFT;
else
val |= (rtbl[i].m & PLL_NORM_FDBK_M_MASK) <<
PLL_NORM_FDBK_M_SHIFT;
writel_relaxed(val, vco->cfg_reg);
if (vco->lock)
spin_unlock_irqrestore(vco->lock, flags);
return 0;
}
static struct clk_ops clk_vco_ops = {
.recalc_rate = clk_vco_recalc_rate,
.round_rate = clk_vco_round_rate,
.set_rate = clk_vco_set_rate,
};
struct clk *clk_register_vco_pll(const char *vco_name, const char *pll_name,
const char *vco_gate_name, const char *parent_name,
unsigned long flags, void __iomem *mode_reg, void __iomem
*cfg_reg, struct pll_rate_tbl *rtbl, u8 rtbl_cnt,
spinlock_t *lock, struct clk **pll_clk,
struct clk **vco_gate_clk)
{
struct clk_vco *vco;
struct clk_pll *pll;
struct clk *vco_clk, *tpll_clk, *tvco_gate_clk;
struct clk_init_data vco_init, pll_init;
const char **vco_parent_name;
if (!vco_name || !pll_name || !parent_name || !mode_reg || !cfg_reg ||
!rtbl || !rtbl_cnt) {
pr_err("Invalid arguments passed");
return ERR_PTR(-EINVAL);
}
vco = kzalloc(sizeof(*vco), GFP_KERNEL);
if (!vco) {
pr_err("could not allocate vco clk\n");
return ERR_PTR(-ENOMEM);
}
pll = kzalloc(sizeof(*pll), GFP_KERNEL);
if (!pll) {
pr_err("could not allocate pll clk\n");
goto free_vco;
}
/* struct clk_vco assignments */
vco->mode_reg = mode_reg;
vco->cfg_reg = cfg_reg;
vco->rtbl = rtbl;
vco->rtbl_cnt = rtbl_cnt;
vco->lock = lock;
vco->hw.init = &vco_init;
pll->vco = vco;
pll->hw.init = &pll_init;
if (vco_gate_name) {
tvco_gate_clk = clk_register_gate(NULL, vco_gate_name,
parent_name, 0, mode_reg, PLL_ENABLE, 0, lock);
if (IS_ERR_OR_NULL(tvco_gate_clk))
goto free_pll;
if (vco_gate_clk)
*vco_gate_clk = tvco_gate_clk;
vco_parent_name = &vco_gate_name;
} else {
vco_parent_name = &parent_name;
}
vco_init.name = vco_name;
vco_init.ops = &clk_vco_ops;
vco_init.flags = flags;
vco_init.parent_names = vco_parent_name;
vco_init.num_parents = 1;
pll_init.name = pll_name;
pll_init.ops = &clk_pll_ops;
pll_init.flags = CLK_SET_RATE_PARENT;
pll_init.parent_names = &vco_name;
pll_init.num_parents = 1;
vco_clk = clk_register(NULL, &vco->hw);
if (IS_ERR_OR_NULL(vco_clk))
goto free_pll;
tpll_clk = clk_register(NULL, &pll->hw);
if (IS_ERR_OR_NULL(tpll_clk))
goto free_pll;
if (pll_clk)
*pll_clk = tpll_clk;
return vco_clk;
free_pll:
kfree(pll);
free_vco:
kfree(vco);
pr_err("Failed to register vco pll clock\n");
return ERR_PTR(-ENOMEM);
}
drivers/clk/spear/clk.c 0 → 100644
View file @ eae0185a
/*
* Copyright (C) 2012 ST Microelectronics
* Viresh Kumar <viresh.kumar@st.com>
*
* 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.
*
* SPEAr clk - Common routines
*/
#include <linux/clk-provider.h>
#include <linux/types.h>
#include "clk.h"
long clk_round_rate_index(struct clk_hw *hw, unsigned long drate,
unsigned long parent_rate, clk_calc_rate calc_rate, u8 rtbl_cnt,
int *index)
{
unsigned long prev_rate, rate = 0;
for (*index = 0; *index < rtbl_cnt; (*index)++) {
prev_rate = rate;
rate = calc_rate(hw, parent_rate, *index);
if (drate < rate) {
/* previous clock was best */
if (*index) {
rate = prev_rate;
(*index)--;
}
break;
}
}
return rate;
}
drivers/clk/spear/clk.h 0 → 100644
View file @ eae0185a
/*
* Clock framework definitions for SPEAr platform
*
* Copyright (C) 2012 ST Microelectronics
* Viresh Kumar <viresh.kumar@st.com>
*
* 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.
*/
#ifndef __SPEAR_CLK_H
#define __SPEAR_CLK_H
#include <linux/clk-provider.h>
#include <linux/spinlock_types.h>
#include <linux/types.h>
/* Auxiliary Synth clk */
/* Default masks */
#define AUX_EQ_SEL_SHIFT 30
#define AUX_EQ_SEL_MASK 1
#define AUX_EQ1_SEL 0
#define AUX_EQ2_SEL 1
#define AUX_XSCALE_SHIFT 16
#define AUX_XSCALE_MASK 0xFFF
#define AUX_YSCALE_SHIFT 0
#define AUX_YSCALE_MASK 0xFFF
#define AUX_SYNT_ENB 31
struct aux_clk_masks {
u32 eq_sel_mask;
u32 eq_sel_shift;
u32 eq1_mask;
u32 eq2_mask;
u32 xscale_sel_mask;
u32 xscale_sel_shift;
u32 yscale_sel_mask;
u32 yscale_sel_shift;
u32 enable_bit;
};
struct aux_rate_tbl {
u16 xscale;
u16 yscale;
u8 eq;
};
struct clk_aux {
struct clk_hw hw;
void __iomem *reg;
struct aux_clk_masks *masks;
struct aux_rate_tbl *rtbl;
u8 rtbl_cnt;
spinlock_t *lock;
};
/* Fractional Synth clk */
struct frac_rate_tbl {
u32 div;
};
struct clk_frac {
struct clk_hw hw;
void __iomem *reg;
struct frac_rate_tbl *rtbl;
u8 rtbl_cnt;
spinlock_t *lock;
};
/* GPT clk */
struct gpt_rate_tbl {
u16 mscale;
u16 nscale;
};
struct clk_gpt {
struct clk_hw hw;
void __iomem *reg;
struct gpt_rate_tbl *rtbl;
u8 rtbl_cnt;
spinlock_t *lock;
};
/* VCO-PLL clk */
struct pll_rate_tbl {
u8 mode;
u16 m;
u8 n;
u8 p;
};
struct clk_vco {
struct clk_hw hw;
void __iomem *mode_reg;
void __iomem *cfg_reg;
struct pll_rate_tbl *rtbl;
u8 rtbl_cnt;
spinlock_t *lock;
};
struct clk_pll {
struct clk_hw hw;
struct clk_vco *vco;
const char *parent[1];
spinlock_t *lock;
};
typedef unsigned long (*clk_calc_rate)(struct clk_hw *hw, unsigned long prate,
int index);
/* clk register routines */
struct clk *clk_register_aux(const char *aux_name, const char *gate_name,
const char *parent_name, unsigned long flags, void __iomem *reg,
struct aux_clk_masks *masks, struct aux_rate_tbl *rtbl,
u8 rtbl_cnt, spinlock_t *lock, struct clk **gate_clk);
struct clk *clk_register_frac(const char *name, const char *parent_name,
unsigned long flags, void __iomem *reg,
struct frac_rate_tbl *rtbl, u8 rtbl_cnt, spinlock_t *lock);
struct clk *clk_register_gpt(const char *name, const char *parent_name, unsigned
long flags, void __iomem *reg, struct gpt_rate_tbl *rtbl, u8
rtbl_cnt, spinlock_t *lock);
struct clk *clk_register_vco_pll(const char *vco_name, const char *pll_name,
const char *vco_gate_name, const char *parent_name,
unsigned long flags, void __iomem *mode_reg, void __iomem
*cfg_reg, struct pll_rate_tbl *rtbl, u8 rtbl_cnt,
spinlock_t *lock, struct clk **pll_clk,
struct clk **vco_gate_clk);
long clk_round_rate_index(struct clk_hw *hw, unsigned long drate,
unsigned long parent_rate, clk_calc_rate calc_rate, u8 rtbl_cnt,
int *index);
#endif /* __SPEAR_CLK_H */
drivers/clk/spear/spear3xx_clock.c 0 → 100644
View file @ eae0185a
This diff is collapsed.
drivers/clk/spear/spear6xx_clock.c 0 → 100644
View file @ eae0185a
This diff is collapsed.
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