[PATCH V5 06/63] ST SPEAr: Formalized timer support
From: Viresh Kumar <hidden>
Date: 2011-01-20 07:25:45
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
From: Shiraz Hashim <redacted> Arch specific timer initialization code is moved into Arch specific file. Signed-off-by: Shiraz Hashim <redacted> Signed-off-by: Rajeev Kumar <redacted> Signed-off-by: Viresh Kumar <redacted> --- arch/arm/mach-spear3xx/include/mach/generic.h | 3 +- arch/arm/mach-spear3xx/spear300_evb.c | 2 +- arch/arm/mach-spear3xx/spear310_evb.c | 2 +- arch/arm/mach-spear3xx/spear320_evb.c | 2 +- arch/arm/mach-spear3xx/spear3xx.c | 32 ++++++++++++++++++++++++- arch/arm/mach-spear6xx/include/mach/generic.h | 3 +- arch/arm/mach-spear6xx/spear600_evb.c | 2 +- arch/arm/mach-spear6xx/spear6xx.c | 31 ++++++++++++++++++++++++ arch/arm/plat-spear/time.c | 21 ++++++---------- 9 files changed, 78 insertions(+), 20 deletions(-)
diff --git a/arch/arm/mach-spear3xx/include/mach/generic.h b/arch/arm/mach-spear3xx/include/mach/generic.h
index c16d2f8..e7d2de8 100644
--- a/arch/arm/mach-spear3xx/include/mach/generic.h
+++ b/arch/arm/mach-spear3xx/include/mach/generic.h@@ -33,10 +33,11 @@ /* Add spear3xx family device structure declarations here */ extern struct amba_device gpio_device; extern struct amba_device uart_device; -extern struct sys_timer spear_sys_timer; +extern struct sys_timer spear3xx_timer; /* Add spear3xx family function declarations here */ void __init clk_init(void); +void __init spear_setup_timer(void); void __init spear3xx_map_io(void); void __init spear3xx_init_irq(void); void __init spear3xx_init(void);
diff --git a/arch/arm/mach-spear3xx/spear300_evb.c b/arch/arm/mach-spear3xx/spear300_evb.c
index 2c90663..cd23c98 100644
--- a/arch/arm/mach-spear3xx/spear300_evb.c
+++ b/arch/arm/mach-spear3xx/spear300_evb.c@@ -71,6 +71,6 @@ MACHINE_START(SPEAR300, "ST-SPEAR300-EVB") .boot_params = 0x00000100, .map_io = spear3xx_map_io, .init_irq = spear3xx_init_irq, - .timer = &spear_sys_timer, + .timer = &spear3xx_timer, .init_machine = spear300_evb_init, MACHINE_END
diff --git a/arch/arm/mach-spear3xx/spear310_evb.c b/arch/arm/mach-spear3xx/spear310_evb.c
index 4e55e55..3855431 100644
--- a/arch/arm/mach-spear3xx/spear310_evb.c
+++ b/arch/arm/mach-spear3xx/spear310_evb.c@@ -78,6 +78,6 @@ MACHINE_START(SPEAR310, "ST-SPEAR310-EVB") .boot_params = 0x00000100, .map_io = spear3xx_map_io, .init_irq = spear3xx_init_irq, - .timer = &spear_sys_timer, + .timer = &spear3xx_timer, .init_machine = spear310_evb_init, MACHINE_END
diff --git a/arch/arm/mach-spear3xx/spear320_evb.c b/arch/arm/mach-spear3xx/spear320_evb.c
index 7083a06..4a7ce35 100644
--- a/arch/arm/mach-spear3xx/spear320_evb.c
+++ b/arch/arm/mach-spear3xx/spear320_evb.c@@ -75,6 +75,6 @@ MACHINE_START(SPEAR320, "ST-SPEAR320-EVB") .boot_params = 0x00000100, .map_io = spear3xx_map_io, .init_irq = spear3xx_init_irq, - .timer = &spear_sys_timer, + .timer = &spear3xx_timer, .init_machine = spear320_evb_init, MACHINE_END
diff --git a/arch/arm/mach-spear3xx/spear3xx.c b/arch/arm/mach-spear3xx/spear3xx.c
index faf8709..e12a06c 100644
--- a/arch/arm/mach-spear3xx/spear3xx.c
+++ b/arch/arm/mach-spear3xx/spear3xx.c@@ -523,5 +523,35 @@ struct pmx_dev pmx_plgpio_45_46_49_50 = { .mode_count = ARRAY_SIZE(pmx_plgpio_45_46_49_50_modes), .enb_on_reset = 1, }; +#endif /* CONFIG_MACH_SPEAR310 || CONFIG_MACH_SPEAR320 */ -#endif +static void __init spear3xx_timer_init(void) +{ + char pclk_name[] = "pll3_48m_clk"; + struct clk *gpt_clk, *pclk; + + /* get the system timer clock */ + gpt_clk = clk_get_sys("gpt0", NULL); + if (IS_ERR(gpt_clk)) { + pr_err("%s:couldn't get clk for gpt\n", __func__); + BUG(); + } + + /* get the suitable parent clock for timer*/ + pclk = clk_get(NULL, pclk_name); + if (IS_ERR(pclk)) { + pr_err("%s:couldn't get %s as parent for gpt\n", + __func__, pclk_name); + BUG(); + } + + clk_set_parent(gpt_clk, pclk); + clk_put(gpt_clk); + clk_put(pclk); + + spear_setup_timer(); +} + +struct sys_timer spear3xx_timer = { + .init = spear3xx_timer_init, +};
diff --git a/arch/arm/mach-spear6xx/include/mach/generic.h b/arch/arm/mach-spear6xx/include/mach/generic.h
index 16205a5..e5967ed 100644
--- a/arch/arm/mach-spear6xx/include/mach/generic.h
+++ b/arch/arm/mach-spear6xx/include/mach/generic.h@@ -31,9 +31,10 @@ /* Add spear6xx family device structure declarations here */ extern struct amba_device gpio_device[]; extern struct amba_device uart_device[]; -extern struct sys_timer spear_sys_timer; +extern struct sys_timer spear6xx_timer; /* Add spear6xx family function declarations here */ +void __init spear_setup_timer(void); void __init spear6xx_map_io(void); void __init spear6xx_init_irq(void); void __init spear6xx_init(void);
diff --git a/arch/arm/mach-spear6xx/spear600_evb.c b/arch/arm/mach-spear6xx/spear600_evb.c
index daff8d0..b0ed0df 100644
--- a/arch/arm/mach-spear6xx/spear600_evb.c
+++ b/arch/arm/mach-spear6xx/spear600_evb.c@@ -46,6 +46,6 @@ MACHINE_START(SPEAR600, "ST-SPEAR600-EVB") .boot_params = 0x00000100, .map_io = spear6xx_map_io, .init_irq = spear6xx_init_irq, - .timer = &spear_sys_timer, + .timer = &spear6xx_timer, .init_machine = spear600_evb_init, MACHINE_END
diff --git a/arch/arm/mach-spear6xx/spear6xx.c b/arch/arm/mach-spear6xx/spear6xx.c
index f2fe14e..9cd3a68 100644
--- a/arch/arm/mach-spear6xx/spear6xx.c
+++ b/arch/arm/mach-spear6xx/spear6xx.c@@ -155,3 +155,34 @@ void __init spear6xx_map_io(void) /* This will initialize clock framework */ clk_init(); } + +static void __init spear6xx_timer_init(void) +{ + char pclk_name[] = "pll3_48m_clk"; + struct clk *gpt_clk, *pclk; + + /* get the system timer clock */ + gpt_clk = clk_get_sys("gpt0", NULL); + if (IS_ERR(gpt_clk)) { + pr_err("%s:couldn't get clk for gpt\n", __func__); + BUG(); + } + + /* get the suitable parent clock for timer*/ + pclk = clk_get(NULL, pclk_name); + if (IS_ERR(pclk)) { + pr_err("%s:couldn't get %s as parent for gpt\n", + __func__, pclk_name); + BUG(); + } + + clk_set_parent(gpt_clk, pclk); + clk_put(gpt_clk); + clk_put(pclk); + + spear_setup_timer(); +} + +struct sys_timer spear6xx_timer = { + .init = spear6xx_timer_init, +};
diff --git a/arch/arm/plat-spear/time.c b/arch/arm/plat-spear/time.c
index 839c88d..100672f 100644
--- a/arch/arm/plat-spear/time.c
+++ b/arch/arm/plat-spear/time.c@@ -1,7 +1,7 @@ /* * arch/arm/plat-spear/time.c * - * Copyright (C) 2009 ST Microelectronics + * Copyright (C) 2010 ST Microelectronics * Shiraz Hashim<shiraz.hashim@st.com> * * This file is licensed under the terms of the GNU General Public
@@ -211,7 +211,7 @@ static void __init spear_clockevent_init(void) void __init spear_setup_timer(void) { - struct clk *pll3_clk; + int ret; if (!request_mem_region(SPEAR_GPT0_BASE, SZ_1K, "gpt0")) { pr_err("%s:cannot get IO addr\n", __func__);
@@ -230,26 +230,21 @@ void __init spear_setup_timer(void) goto err_iomap; } - pll3_clk = clk_get(NULL, "pll3_48m_clk"); - if (!pll3_clk) { - pr_err("%s:couldn't get PLL3 as parent for gpt\n", __func__); - goto err_iomap; + ret = clk_enable(gpt_clk); + if (ret < 0) { + pr_err("%s:couldn't enable gpt clock\n", __func__); + goto err_clk; } - clk_set_parent(gpt_clk, pll3_clk); - spear_clockevent_init(); spear_clocksource_init(); return; +err_clk: + clk_put(gpt_clk); err_iomap: iounmap(gpt_base); - err_mem: release_mem_region(SPEAR_GPT0_BASE, SZ_1K); } - -struct sys_timer spear_sys_timer = { - .init = spear_setup_timer, -};
--
1.7.3.4