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msm: clock: Migrate to clkdev 

Migrating to clkdev has several advantages:

 * Less code in mach-msm/clock.c

 * A more robust clk_get() implementation

 * clk_add_alias() support

 * clk_get_sys() support

In general, this will help board authors setup clock aliases and
break the dependency on device pointers in the clock tables.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
This commit is contained in:
Stephen Boyd 2011-02-23 09:37:42 -08:00 committed by David Brown
parent 2a52220c89
commit bd32344a6b
15 changed files with 98 additions and 86 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/Kconfig
View File

@ -619,6 +619,7 @@ config ARCH_MSM
select HAVE_CLK
select GENERIC_CLOCKEVENTS
select ARCH_REQUIRE_GPIOLIB
select CLKDEV_LOOKUP
help
Support for Qualcomm MSM/QSD based systems. This runs on the
apps processor of the MSM/QSD and depends on a shared memory

1
arch/arm/mach-msm/board-msm7x30.c
View File

@ -23,6 +23,7 @@
#include <linux/io.h>
#include <linux/smsc911x.h>
#include <linux/usb/msm_hsusb.h>
#include <linux/clkdev.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>

1
arch/arm/mach-msm/board-msm8960.c
View File

@ -19,6 +19,7 @@
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/clkdev.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>

1
arch/arm/mach-msm/board-qsd8x50.c
View File

@ -22,6 +22,7 @@
#include <linux/delay.h>
#include <linux/usb/msm_hsusb.h>
#include <linux/err.h>
#include <linux/clkdev.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>

1
arch/arm/mach-msm/board-trout.c
View File

@ -17,6 +17,7 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/clkdev.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>

31
arch/arm/mach-msm/clock-7x30.h
View File

@ -130,23 +130,26 @@ void pll_disable(uint32_t pll);
extern int internal_pwr_rail_ctl_auto(unsigned rail_id, bool enable);
#define CLK_7X30(clk_name, clk_id, clk_dev, clk_flags) { \
.name = clk_name, \
.id = L_7X30_##clk_id, \
.remote_id = P_##clk_id, \
.flags = clk_flags, \
.dev = clk_dev, \
.dbg_name = #clk_id, \
.con_id = clk_name, \
.dev_id = clk_dev, \
.clk = &(struct clk){ \
.id = L_7X30_##clk_id, \
.remote_id = P_##clk_id, \
.flags = clk_flags, \
.dbg_name = #clk_id, \
}, \
}
#define CLK_7X30S(clk_name, l_id, r_id, clk_dev, clk_flags) { \
.name = clk_name, \
.id = L_7X30_##l_id, \
.remote_id = P_##r_id, \
.flags = clk_flags, \
.dev = clk_dev, \
.dbg_name = #l_id, \
.ops = &clk_ops_pcom, \
.con_id = clk_name, \
.dev_id = clk_dev, \
.clk = &(struct clk){ \
.id = L_7X30_##l_id, \
.remote_id = P_##r_id, \
.flags = clk_flags, \
.dbg_name = #l_id, \
.ops = &clk_ops_pcom, \
}, \
}
#endif

16
arch/arm/mach-msm/clock-pcom.h
View File

@ -126,13 +126,15 @@ extern struct clk_ops clk_ops_pcom;
int pc_clk_reset(unsigned id, enum clk_reset_action action);
#define CLK_PCOM(clk_name, clk_id, clk_dev, clk_flags) { \
.name = clk_name, \
.id = P_##clk_id, \
.remote_id = P_##clk_id, \
.ops = &clk_ops_pcom, \
.flags = clk_flags, \
.dev = clk_dev, \
.dbg_name = #clk_id, \
.con_id = clk_name, \
.dev_id = clk_dev, \
.clk = &(struct clk){ \
.id = P_##clk_id, \
.remote_id = P_##clk_id, \
.ops = &clk_ops_pcom, \
.flags = clk_flags, \
.dbg_name = #clk_id, \
}, \
}
#endif

39
arch/arm/mach-msm/clock.c
View File

@ -19,6 +19,11 @@
#include <linux/err.h>
#include <linux/spinlock.h>
#include <linux/pm_qos_params.h>
#include <linux/mutex.h>
#include <linux/clk.h>
#include <linux/string.h>
#include <linux/module.h>
#include <linux/clkdev.h>
#include "clock.h"
@ -29,32 +34,6 @@ static LIST_HEAD(clocks);
/*
* Standard clock functions defined in include/linux/clk.h
*/
struct clk *clk_get(struct device *dev, const char *id)
{
struct clk *clk;
mutex_lock(&clocks_mutex);
list_for_each_entry(clk, &clocks, list)
if (!strcmp(id, clk->name) && clk->dev == dev)
goto found_it;
list_for_each_entry(clk, &clocks, list)
if (!strcmp(id, clk->name) && clk->dev == NULL)
goto found_it;
clk = ERR_PTR(-ENOENT);
found_it:
mutex_unlock(&clocks_mutex);
return clk;
}
EXPORT_SYMBOL(clk_get);
void clk_put(struct clk *clk)
{
}
EXPORT_SYMBOL(clk_put);
int clk_enable(struct clk *clk)
{
unsigned long flags;
@ -157,13 +136,15 @@ EXPORT_SYMBOL(clk_set_flags);
*/
static struct clk *ebi1_clk;
void __init msm_clock_init(struct clk *clock_tbl, unsigned num_clocks)
void __init msm_clock_init(struct clk_lookup *clock_tbl, unsigned num_clocks)
{
unsigned n;
mutex_lock(&clocks_mutex);
for (n = 0; n < num_clocks; n++)
list_add_tail(&clock_tbl[n].list, &clocks);
for (n = 0; n < num_clocks; n++) {
clkdev_add(&clock_tbl[n]);
list_add_tail(&clock_tbl[n].clk->list, &clocks);
}
mutex_unlock(&clocks_mutex);
ebi1_clk = clk_get(NULL, "ebi1_clk");

2
arch/arm/mach-msm/clock.h
View File

@ -51,11 +51,9 @@ struct clk {
uint32_t remote_id;
uint32_t count;
uint32_t flags;
const char *name;
struct clk_ops *ops;
const char *dbg_name;
struct list_head list;
struct device *dev;
};
#define OFF CLKFLAG_AUTO_OFF

32
arch/arm/mach-msm/devices-msm7x00.c
View File

@ -15,6 +15,7 @@
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/clkdev.h>
#include <mach/irqs.h>
#include <mach/msm_iomap.h>
@ -24,7 +25,6 @@
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
#include "clock.h"
#include "clock-pcom.h"
#include <mach/mmc.h>
@ -418,7 +418,7 @@ struct platform_device msm_device_mdp = {
.resource = resources_mdp,
};
struct clk msm_clocks_7x01a[] = {
struct clk_lookup msm_clocks_7x01a[] = {
CLK_PCOM("adm_clk", ADM_CLK, NULL, 0),
CLK_PCOM("adsp_clk", ADSP_CLK, NULL, 0),
CLK_PCOM("ebi1_clk", EBI1_CLK, NULL, 0),
@ -427,7 +427,7 @@ struct clk msm_clocks_7x01a[] = {
CLK_PCOM("emdh_clk", EMDH_CLK, NULL, OFF),
CLK_PCOM("gp_clk", GP_CLK, NULL, 0),
CLK_PCOM("grp_clk", GRP_3D_CLK, NULL, OFF),
CLK_PCOM("i2c_clk", I2C_CLK, &msm_device_i2c.dev, 0),
CLK_PCOM("i2c_clk", I2C_CLK, "msm_i2c.0", 0),
CLK_PCOM("icodec_rx_clk", ICODEC_RX_CLK, NULL, 0),
CLK_PCOM("icodec_tx_clk", ICODEC_TX_CLK, NULL, 0),
CLK_PCOM("imem_clk", IMEM_CLK, NULL, OFF),
@ -437,25 +437,25 @@ struct clk msm_clocks_7x01a[] = {
CLK_PCOM("pcm_clk", PCM_CLK, NULL, 0),
CLK_PCOM("mddi_clk", PMDH_CLK, NULL, OFF | CLK_MINMAX),
CLK_PCOM("sdac_clk", SDAC_CLK, NULL, OFF),
CLK_PCOM("sdc_clk", SDC1_CLK, &msm_device_sdc1.dev, OFF),
CLK_PCOM("sdc_pclk", SDC1_P_CLK, &msm_device_sdc1.dev, OFF),
CLK_PCOM("sdc_clk", SDC2_CLK, &msm_device_sdc2.dev, OFF),
CLK_PCOM("sdc_pclk", SDC2_P_CLK, &msm_device_sdc2.dev, OFF),
CLK_PCOM("sdc_clk", SDC3_CLK, &msm_device_sdc3.dev, OFF),
CLK_PCOM("sdc_pclk", SDC3_P_CLK, &msm_device_sdc3.dev, OFF),
CLK_PCOM("sdc_clk", SDC4_CLK, &msm_device_sdc4.dev, OFF),
CLK_PCOM("sdc_pclk", SDC4_P_CLK, &msm_device_sdc4.dev, OFF),
CLK_PCOM("sdc_clk", SDC1_CLK, "msm_sdcc.1", OFF),
CLK_PCOM("sdc_pclk", SDC1_P_CLK, "msm_sdcc.1", OFF),
CLK_PCOM("sdc_clk", SDC2_CLK, "msm_sdcc.2", OFF),
CLK_PCOM("sdc_pclk", SDC2_P_CLK, "msm_sdcc.2", OFF),
CLK_PCOM("sdc_clk", SDC3_CLK, "msm_sdcc.3", OFF),
CLK_PCOM("sdc_pclk", SDC3_P_CLK, "msm_sdcc.3", OFF),
CLK_PCOM("sdc_clk", SDC4_CLK, "msm_sdcc.4", OFF),
CLK_PCOM("sdc_pclk", SDC4_P_CLK, "msm_sdcc.4", OFF),
CLK_PCOM("tsif_clk", TSIF_CLK, NULL, 0),
CLK_PCOM("tsif_ref_clk", TSIF_REF_CLK, NULL, 0),
CLK_PCOM("tv_dac_clk", TV_DAC_CLK, NULL, 0),
CLK_PCOM("tv_enc_clk", TV_ENC_CLK, NULL, 0),
CLK_PCOM("uart_clk", UART1_CLK, &msm_device_uart1.dev, OFF),
CLK_PCOM("uart_clk", UART2_CLK, &msm_device_uart2.dev, 0),
CLK_PCOM("uart_clk", UART3_CLK, &msm_device_uart3.dev, OFF),
CLK_PCOM("uart_clk", UART1_CLK, "msm_serial.0", OFF),
CLK_PCOM("uart_clk", UART2_CLK, "msm_serial.1", 0),
CLK_PCOM("uart_clk", UART3_CLK, "msm_serial.2", OFF),
CLK_PCOM("uart1dm_clk", UART1DM_CLK, NULL, OFF),
CLK_PCOM("uart2dm_clk", UART2DM_CLK, NULL, 0),
CLK_PCOM("usb_hs_clk", USB_HS_CLK, &msm_device_hsusb.dev, OFF),
CLK_PCOM("usb_hs_pclk", USB_HS_P_CLK, &msm_device_hsusb.dev, OFF),
CLK_PCOM("usb_hs_clk", USB_HS_CLK, "msm_hsusb", OFF),
CLK_PCOM("usb_hs_pclk", USB_HS_P_CLK, "msm_hsusb", OFF),
CLK_PCOM("usb_otg_clk", USB_OTG_CLK, NULL, 0),
CLK_PCOM("vdc_clk", VDC_CLK, NULL, OFF ),
CLK_PCOM("vfe_clk", VFE_CLK, NULL, OFF),

5
arch/arm/mach-msm/devices-msm7x30.c
View File

@ -17,6 +17,7 @@
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/clkdev.h>
#include <mach/irqs.h>
#include <mach/msm_iomap.h>
#include <mach/dma.h>
@ -129,7 +130,7 @@ struct platform_device msm_device_hsusb_host = {
},
};
struct clk msm_clocks_7x30[] = {
struct clk_lookup msm_clocks_7x30[] = {
CLK_PCOM("adm_clk", ADM_CLK, NULL, 0),
CLK_PCOM("adsp_clk", ADSP_CLK, NULL, 0),
CLK_PCOM("cam_m_clk", CAM_M_CLK, NULL, 0),
@ -181,7 +182,7 @@ struct clk msm_clocks_7x30[] = {
CLK_7X30S("tv_src_clk", TV_CLK, TV_ENC_CLK, NULL, 0),
CLK_PCOM("tv_dac_clk", TV_DAC_CLK, NULL, 0),
CLK_PCOM("tv_enc_clk", TV_ENC_CLK, NULL, 0),
CLK_PCOM("uart_clk", UART2_CLK, &msm_device_uart2.dev, 0),
CLK_PCOM("uart_clk", UART2_CLK, "msm_serial.1", 0),
CLK_PCOM("usb_phy_clk", USB_PHY_CLK, NULL, 0),
CLK_PCOM("usb_hs_clk", USB_HS_CLK, NULL, OFF),
CLK_PCOM("usb_hs_pclk", USB_HS_P_CLK, NULL, OFF),

23
arch/arm/mach-msm/devices-qsd8x50.c
View File

@ -15,8 +15,9 @@
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/clkdev.h>
#include <linux/dma-mapping.h>
#include <mach/irqs.h>
#include <mach/msm_iomap.h>
#include <mach/dma.h>
@ -314,7 +315,7 @@ int __init msm_add_sdcc(unsigned int controller,
return platform_device_register(pdev);
}
struct clk msm_clocks_8x50[] = {
struct clk_lookup msm_clocks_8x50[] = {
CLK_PCOM("adm_clk", ADM_CLK, NULL, 0),
CLK_PCOM("ce_clk", CE_CLK, NULL, 0),
CLK_PCOM("ebi1_clk", EBI1_CLK, NULL, CLK_MIN),
@ -336,14 +337,14 @@ struct clk msm_clocks_8x50[] = {
CLK_PCOM("pbus_clk", PBUS_CLK, NULL, CLK_MIN),
CLK_PCOM("pcm_clk", PCM_CLK, NULL, 0),
CLK_PCOM("sdac_clk", SDAC_CLK, NULL, OFF),
CLK_PCOM("sdc_clk", SDC1_CLK, &msm_device_sdc1.dev, OFF),
CLK_PCOM("sdc_pclk", SDC1_P_CLK, &msm_device_sdc1.dev, OFF),
CLK_PCOM("sdc_clk", SDC2_CLK, &msm_device_sdc2.dev, OFF),
CLK_PCOM("sdc_pclk", SDC2_P_CLK, &msm_device_sdc2.dev, OFF),
CLK_PCOM("sdc_clk", SDC3_CLK, &msm_device_sdc3.dev, OFF),
CLK_PCOM("sdc_pclk", SDC3_P_CLK, &msm_device_sdc3.dev, OFF),
CLK_PCOM("sdc_clk", SDC4_CLK, &msm_device_sdc4.dev, OFF),
CLK_PCOM("sdc_pclk", SDC4_P_CLK, &msm_device_sdc4.dev, OFF),
CLK_PCOM("sdc_clk", SDC1_CLK, "msm_sdcc.1", OFF),
CLK_PCOM("sdc_pclk", SDC1_P_CLK, "msm_sdcc.1", OFF),
CLK_PCOM("sdc_clk", SDC2_CLK, "msm_sdcc.2", OFF),
CLK_PCOM("sdc_pclk", SDC2_P_CLK, "msm_sdcc.2", OFF),
CLK_PCOM("sdc_clk", SDC3_CLK, "msm_sdcc.3", OFF),
CLK_PCOM("sdc_pclk", SDC3_P_CLK, "msm_sdcc.3", OFF),
CLK_PCOM("sdc_clk", SDC4_CLK, "msm_sdcc.4", OFF),
CLK_PCOM("sdc_pclk", SDC4_P_CLK, "msm_sdcc.4", OFF),
CLK_PCOM("spi_clk", SPI_CLK, NULL, 0),
CLK_PCOM("tsif_clk", TSIF_CLK, NULL, 0),
CLK_PCOM("tsif_ref_clk", TSIF_REF_CLK, NULL, 0),
@ -351,7 +352,7 @@ struct clk msm_clocks_8x50[] = {
CLK_PCOM("tv_enc_clk", TV_ENC_CLK, NULL, 0),
CLK_PCOM("uart_clk", UART1_CLK, NULL, OFF),
CLK_PCOM("uart_clk", UART2_CLK, NULL, 0),
CLK_PCOM("uart_clk", UART3_CLK, &msm_device_uart3.dev, OFF),
CLK_PCOM("uart_clk", UART3_CLK, "msm_serial.2", OFF),
CLK_PCOM("uartdm_clk", UART1DM_CLK, NULL, OFF),
CLK_PCOM("uartdm_clk", UART2DM_CLK, NULL, 0),
CLK_PCOM("usb_hs_clk", USB_HS_CLK, NULL, OFF),

8
arch/arm/mach-msm/devices.h
View File

@ -16,6 +16,8 @@
#ifndef __ARCH_ARM_MACH_MSM_DEVICES_H
#define __ARCH_ARM_MACH_MSM_DEVICES_H
#include <linux/clkdev.h>
#include "clock.h"
extern struct platform_device msm_device_uart1;
@ -44,13 +46,13 @@ extern struct platform_device msm_device_mddi0;
extern struct platform_device msm_device_mddi1;
extern struct platform_device msm_device_mdp;
extern struct clk msm_clocks_7x01a[];
extern struct clk_lookup msm_clocks_7x01a[];
extern unsigned msm_num_clocks_7x01a;
extern struct clk msm_clocks_7x30[];
extern struct clk_lookup msm_clocks_7x30[];
extern unsigned msm_num_clocks_7x30;
extern struct clk msm_clocks_8x50[];
extern struct clk_lookup msm_clocks_8x50[];
extern unsigned msm_num_clocks_8x50;
#endif

4
arch/arm/mach-msm/include/mach/board.h
View File

@ -31,7 +31,7 @@ struct msm_acpu_clock_platform_data
unsigned long wait_for_irq_khz;
};
struct clk;
struct clk_lookup;
extern struct sys_timer msm_timer;
@ -41,7 +41,7 @@ void __init msm_add_devices(void);
void __init msm_map_common_io(void);
void __init msm_init_irq(void);
void __init msm_init_gpio(void);
void __init msm_clock_init(struct clk *clock_tbl, unsigned num_clocks);
void __init msm_clock_init(struct clk_lookup *clock_tbl, unsigned num_clocks);
void __init msm_acpu_clock_init(struct msm_acpu_clock_platform_data *);
int __init msm_add_sdcc(unsigned int controller,
struct msm_mmc_platform_data *plat,

19
arch/arm/mach-msm/include/mach/clkdev.h Normal file
View File

@ -0,0 +1,19 @@
/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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.
*/
#ifndef __ASM_ARCH_MSM_CLKDEV_H
#define __ASM_ARCH_MSM_CLKDEV_H
struct clk;
static inline int __clk_get(struct clk *clk) { return 1; }
static inline void __clk_put(struct clk *clk) { }
#endif