From 7ee68fe85f1a9e9db17d9760998c284cb85f56fa Mon Sep 17 00:00:00 2001 From: Rajeshwari Shinde Date: Thu, 29 Nov 2012 20:29:35 +0000 Subject: EXYNOS5: Add L2 Cache Support. This patch set adds L2 Cache Support to EXYNOS. Signed-off-by: Arun Mankuzhi Signed-off-by: Rajeshwari Shinde Acked-by: Simon Glass Signed-off-by: Minkyu Kang --- arch/arm/cpu/armv7/exynos/soc.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) (limited to 'arch/arm') diff --git a/arch/arm/cpu/armv7/exynos/soc.c b/arch/arm/cpu/armv7/exynos/soc.c index ab65b8d..e948e4c 100644 --- a/arch/arm/cpu/armv7/exynos/soc.c +++ b/arch/arm/cpu/armv7/exynos/soc.c @@ -23,6 +23,14 @@ #include #include +#include + +enum l2_cache_params { + CACHE_TAG_RAM_SETUP = (1 << 9), + CACHE_DATA_RAM_SETUP = (1 << 5), + CACHE_TAG_RAM_LATENCY = (2 << 6), + CACHE_DATA_RAM_LATENCY = (2 << 0) +}; void reset_cpu(ulong addr) { @@ -36,3 +44,31 @@ void enable_caches(void) dcache_enable(); } #endif + +#ifndef CONFIG_SYS_L2CACHE_OFF +/* + * Set L2 cache parameters + */ +static void exynos5_set_l2cache_params(void) +{ + unsigned int val = 0; + + asm volatile("mrc p15, 1, %0, c9, c0, 2\n" : "=r"(val)); + + val |= CACHE_TAG_RAM_SETUP | + CACHE_DATA_RAM_SETUP | + CACHE_TAG_RAM_LATENCY | + CACHE_DATA_RAM_LATENCY; + + asm volatile("mcr p15, 1, %0, c9, c0, 2\n" : : "r"(val)); +} + +/* + * Sets L2 cache related parameters before enabling data cache + */ +void v7_outer_cache_enable(void) +{ + if (cpu_is_exynos5()) + exynos5_set_l2cache_params(); +} +#endif -- cgit v1.1 From c18222bee868ae65a878165551d3d407c402f48c Mon Sep 17 00:00:00 2001 From: Ajay Kumar Date: Thu, 21 Feb 2013 23:52:58 +0000 Subject: video: exynos_dp: Remove callbacks from the driver Replaced the functionality of callbacks by using a standard set of functions. Instead of implementing and hooking up a callback, put the same code in one of the standard set of functions by overriding it. Signed-off-by: Ajay Kumar Signed-off-by: Minkyu Kang --- arch/arm/include/asm/arch-exynos/dp_info.h | 1 - 1 file changed, 1 deletion(-) (limited to 'arch/arm') diff --git a/arch/arm/include/asm/arch-exynos/dp_info.h b/arch/arm/include/asm/arch-exynos/dp_info.h index 102b709..ff16361 100644 --- a/arch/arm/include/asm/arch-exynos/dp_info.h +++ b/arch/arm/include/asm/arch-exynos/dp_info.h @@ -199,7 +199,6 @@ enum { struct exynos_dp_platform_data { struct edp_device_info *edp_dev_info; - void (*phy_enable)(unsigned int); }; #ifdef CONFIG_EXYNOS_DP -- cgit v1.1 From 9a1313e1c1298197fc8b7fc15c3d58c9765897cd Mon Sep 17 00:00:00 2001 From: Ajay Kumar Date: Thu, 21 Feb 2013 23:53:02 +0000 Subject: EXYNOS5: Add device node for FIMD Add DT node and bindings documentation for FIMD. Signed-off-by: Ajay Kumar Signed-off-by: Minkyu Kang --- arch/arm/dts/exynos5250.dtsi | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'arch/arm') diff --git a/arch/arm/dts/exynos5250.dtsi b/arch/arm/dts/exynos5250.dtsi index 61d35a8..cfc9062 100644 --- a/arch/arm/dts/exynos5250.dtsi +++ b/arch/arm/dts/exynos5250.dtsi @@ -156,4 +156,10 @@ reg = <0x10060000 0x10000>; }; + fimd@14400000 { + compatible = "samsung,exynos-fimd"; + reg = <0x14400000 0x10000>; + #address-cells = <1>; + #size-cells = <1>; + }; }; -- cgit v1.1 From 71e6ba4655f27a1e6165f4fd54b80b6854159818 Mon Sep 17 00:00:00 2001 From: Ajay Kumar Date: Thu, 21 Feb 2013 23:53:07 +0000 Subject: EXYNOS5: Add device node for DP Add DT node and bindings documentaion for DP. Signed-off-by: Ajay Kumar Signed-off-by: Minkyu Kang --- arch/arm/dts/exynos5250.dtsi | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'arch/arm') diff --git a/arch/arm/dts/exynos5250.dtsi b/arch/arm/dts/exynos5250.dtsi index cfc9062..df4b231 100644 --- a/arch/arm/dts/exynos5250.dtsi +++ b/arch/arm/dts/exynos5250.dtsi @@ -162,4 +162,11 @@ #address-cells = <1>; #size-cells = <1>; }; + + dp@145b0000 { + compatible = "samsung,exynos5-dp"; + reg = <0x145b0000 0x1000>; + #address-cells = <1>; + #size-cells = <1>; + }; }; -- cgit v1.1 From acbb1eb7723726f10e099bd5c05a3e993b1fe9ec Mon Sep 17 00:00:00 2001 From: Akshay Saraswat Date: Wed, 20 Mar 2013 21:00:56 +0000 Subject: Exynos: Add hardware accelerated SHA256 and SHA1 SHA-256 and SHA-1 accelerated using ACE hardware. Signed-off-by: ARUN MANKUZHI Signed-off-by: Akshay Saraswat Acked-by: Simon Glass --- arch/arm/include/asm/arch-exynos/cpu.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/arm') diff --git a/arch/arm/include/asm/arch-exynos/cpu.h b/arch/arm/include/asm/arch-exynos/cpu.h index eb34422..2a20558 100644 --- a/arch/arm/include/asm/arch-exynos/cpu.h +++ b/arch/arm/include/asm/arch-exynos/cpu.h @@ -62,6 +62,7 @@ #define EXYNOS4_GPIO_PART4_BASE DEVICE_NOT_AVAILABLE #define EXYNOS4_DP_BASE DEVICE_NOT_AVAILABLE #define EXYNOS4_SPI_ISP_BASE DEVICE_NOT_AVAILABLE +#define EXYNOS4_ACE_SFR_BASE DEVICE_NOT_AVAILABLE /* EXYNOS4X12 */ #define EXYNOS4X12_GPIO_PART3_BASE 0x03860000 @@ -95,6 +96,7 @@ #define EXYNOS4X12_I2S_BASE DEVICE_NOT_AVAILABLE #define EXYNOS4X12_SPI_BASE DEVICE_NOT_AVAILABLE #define EXYNOS4X12_SPI_ISP_BASE DEVICE_NOT_AVAILABLE +#define EXYNOS4X12_ACE_SFR_BASE DEVICE_NOT_AVAILABLE /* EXYNOS5 Common*/ #define EXYNOS5_I2C_SPACING 0x10000 @@ -106,6 +108,7 @@ #define EXYNOS5_SWRESET 0x10040400 #define EXYNOS5_SYSREG_BASE 0x10050000 #define EXYNOS5_WATCHDOG_BASE 0x101D0000 +#define EXYNOS5_ACE_SFR_BASE 0x10830000 #define EXYNOS5_DMC_PHY0_BASE 0x10C00000 #define EXYNOS5_DMC_PHY1_BASE 0x10C10000 #define EXYNOS5_GPIO_PART3_BASE 0x10D10000 @@ -205,6 +208,7 @@ static inline unsigned int samsung_get_base_##device(void) \ SAMSUNG_BASE(adc, ADC_BASE) SAMSUNG_BASE(clock, CLOCK_BASE) +SAMSUNG_BASE(ace_sfr, ACE_SFR_BASE) SAMSUNG_BASE(dp, DP_BASE) SAMSUNG_BASE(sysreg, SYSREG_BASE) SAMSUNG_BASE(fimd, FIMD_BASE) -- cgit v1.1 From 3d00c0cb96ff93a929700b80d89cb905e5ab5315 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 28 Mar 2013 04:32:16 +0000 Subject: Exynos: Change get_timer() to work correctly At present get_timer() does not return sane values. It should count up smoothly in milliscond intervals. We can change the PWM to count down at 1MHz, providing a resolution of 1us and a range of about an hour between required get_timer() calls. Test with command "sf probe 1:0; time sf read 40008000 0 1000". Try with different numbers of bytes and see that sane values are obtained Signed-off-by: Simon Glass Signed-off-by: Akshay Saraswat Acked-by: Simon Glass Signed-off-by: Minkyu Kang --- arch/arm/cpu/armv7/s5p-common/pwm.c | 6 ++ arch/arm/cpu/armv7/s5p-common/timer.c | 100 +++++++++++++--------------------- 2 files changed, 44 insertions(+), 62 deletions(-) (limited to 'arch/arm') diff --git a/arch/arm/cpu/armv7/s5p-common/pwm.c b/arch/arm/cpu/armv7/s5p-common/pwm.c index 44d7bc3..3147f59 100644 --- a/arch/arm/cpu/armv7/s5p-common/pwm.c +++ b/arch/arm/cpu/armv7/s5p-common/pwm.c @@ -174,6 +174,12 @@ int pwm_init(int pwm_id, int div, int invert) /* set count value */ offset = pwm_id * 3; + + /* + * TODO(sjg): Use this as a countdown timer for now. We count down + * from the maximum value to 0, then reset. + */ + timer_rate_hz = -1; writel(timer_rate_hz, &pwm->tcntb0 + offset); val = readl(&pwm->tcon) & ~(0xf << TCON_OFFSET(pwm_id)); diff --git a/arch/arm/cpu/armv7/s5p-common/timer.c b/arch/arm/cpu/armv7/s5p-common/timer.c index e78c716..c48a297 100644 --- a/arch/arm/cpu/armv7/s5p-common/timer.c +++ b/arch/arm/cpu/armv7/s5p-common/timer.c @@ -39,13 +39,33 @@ static inline struct s5p_timer *s5p_get_base_timer(void) return (struct s5p_timer *)samsung_get_base_timer(); } +/** + * Read the countdown timer. + * + * This operates at 1MHz and counts downwards. It will wrap about every + * hour (2^32 microseconds). + * + * @return current value of timer + */ +static unsigned long timer_get_us_down(void) +{ + struct s5p_timer *const timer = s5p_get_base_timer(); + + return readl(&timer->tcnto4); +} + int timer_init(void) { /* PWM Timer 4 */ - pwm_init(4, MUX_DIV_2, 0); + pwm_init(4, MUX_DIV_4, 0); pwm_config(4, 0, 0); pwm_enable(4); + /* Use this as the current monotonic time in us */ + gd->arch.timer_reset_value = 0; + + /* Use this as the last timer value we saw */ + gd->arch.lastinc = timer_get_us_down(); reset_timer_masked(); return 0; @@ -56,48 +76,28 @@ int timer_init(void) */ unsigned long get_timer(unsigned long base) { - return get_timer_masked() - base; + ulong now = timer_get_us_down(); + + /* + * Increment the time by the amount elapsed since the last read. + * The timer may have wrapped around, but it makes no difference to + * our arithmetic here. + */ + gd->arch.timer_reset_value += gd->arch.lastinc - now; + gd->arch.lastinc = now; + + /* Divide by 1000 to convert from us to ms */ + return gd->arch.timer_reset_value / 1000 - base; } /* delay x useconds */ void __udelay(unsigned long usec) { - struct s5p_timer *const timer = s5p_get_base_timer(); - unsigned long tmo, tmp, count_value; - - count_value = readl(&timer->tcntb4); - - if (usec >= 1000) { - /* - * if "big" number, spread normalization - * to seconds - * 1. start to normalize for usec to ticks per sec - * 2. find number of "ticks" to wait to achieve target - * 3. finish normalize. - */ - tmo = usec / 1000; - tmo *= (CONFIG_SYS_HZ * count_value); - tmo /= 1000; - } else { - /* else small number, don't kill it prior to HZ multiply */ - tmo = usec * CONFIG_SYS_HZ * count_value; - tmo /= (1000 * 1000); - } - - /* get current timestamp */ - tmp = get_current_tick(); - - /* if setting this fordward will roll time stamp */ - /* reset "advancing" timestamp to 0, set lastinc value */ - /* else, set advancing stamp wake up time */ - if ((tmo + tmp + 1) < tmp) - reset_timer_masked(); - else - tmo += tmp; - - /* loop till event */ - while (get_current_tick() < tmo) - ; /* nop */ + unsigned long count_value; + + count_value = timer_get_us_down(); + while ((int)(count_value - timer_get_us_down()) < (int)usec) + ; } void reset_timer_masked(void) @@ -109,30 +109,6 @@ void reset_timer_masked(void) gd->arch.tbl = 0; } -unsigned long get_timer_masked(void) -{ - struct s5p_timer *const timer = s5p_get_base_timer(); - unsigned long count_value = readl(&timer->tcntb4); - - return get_current_tick() / count_value; -} - -unsigned long get_current_tick(void) -{ - struct s5p_timer *const timer = s5p_get_base_timer(); - unsigned long now = readl(&timer->tcnto4); - unsigned long count_value = readl(&timer->tcntb4); - - if (gd->arch.lastinc >= now) - gd->arch.tbl += gd->arch.lastinc - now; - else - gd->arch.tbl += gd->arch.lastinc + count_value - now; - - gd->arch.lastinc = now; - - return gd->arch.tbl; -} - /* * This function is derived from PowerPC code (read timebase as long long). * On ARM it just returns the timer value. -- cgit v1.1 From f24869d3a8f6646c2d207057719e6fa0a8f31eb0 Mon Sep 17 00:00:00 2001 From: Che-Liang Chiou Date: Thu, 28 Mar 2013 04:32:17 +0000 Subject: Exynos: Add timer_get_us function timer_get_us returns the time in microseconds since a certain reference point of history. However, it does not guarantee to return an accurate time after a long period; instead, it wraps around (that is, the reference point is reset to some other point of history) after some periods. The frequency of wrapping around is about an hour (or 2^32 microseconds). Test with command "sf probe 1:0; time sf read 40008000 0 1000". Try with different numbers of bytes and see that sane values are obtained Signed-off-by: Che-Liang Chiou Signed-off-by: Akshay Saraswat Acked-by: Simon Glass Signed-off-by: Minkyu Kang --- arch/arm/cpu/armv7/s5p-common/timer.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'arch/arm') diff --git a/arch/arm/cpu/armv7/s5p-common/timer.c b/arch/arm/cpu/armv7/s5p-common/timer.c index c48a297..de61405 100644 --- a/arch/arm/cpu/armv7/s5p-common/timer.c +++ b/arch/arm/cpu/armv7/s5p-common/timer.c @@ -90,6 +90,21 @@ unsigned long get_timer(unsigned long base) return gd->arch.timer_reset_value / 1000 - base; } +unsigned long timer_get_us(void) +{ + static unsigned long base_time_us; + + struct s5p_timer *const timer = + (struct s5p_timer *)samsung_get_base_timer(); + unsigned long now_downward_us = readl(&timer->tcnto4); + + if (!base_time_us) + base_time_us = now_downward_us; + + /* Note that this timer counts downward. */ + return base_time_us - now_downward_us; +} + /* delay x useconds */ void __udelay(unsigned long usec) { -- cgit v1.1 From c059f274ade1a5f7d1f39927d8b31a41cba9034c Mon Sep 17 00:00:00 2001 From: Gabe Black Date: Thu, 28 Mar 2013 04:32:18 +0000 Subject: Exynos: pwm: Fix two bugs in the exynos pwm configuration code First, the "div" value was being used incorrectly to compute the frequency of the PWM timer. The value passed in is a constant which reflects the value that would be found in a configuration register, 0 to 4. That should correspond to a scaling factor of 1, 2, 4, 8, or 16, 1 << div, but div + 1 was being used instead. Second, the reset value of the timers were being calculated to give an overall frequency, thrown out, and set to a maximum value. This was done so that PWM 4 could be used as the system clock by counting down from a high value, but it was applied indiscriminantly. It should at most be applied only to PWM 4. This change also takes the opportunity to tidy up the pwm_init function. Test with command "sf probe 1:0; time sf read 40008000 0 1000". Try with different numbers of bytes and see that sane values are obtained Build and boot U-boot with this patch, backlight works properly. Signed-off-by: Gabe Black Signed-off-by: Akshay Saraswat Acked-by: Simon Glass Signed-off-by: Minkyu Kang --- arch/arm/cpu/armv7/s5p-common/pwm.c | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-) (limited to 'arch/arm') diff --git a/arch/arm/cpu/armv7/s5p-common/pwm.c b/arch/arm/cpu/armv7/s5p-common/pwm.c index 3147f59..02156d1 100644 --- a/arch/arm/cpu/armv7/s5p-common/pwm.c +++ b/arch/arm/cpu/armv7/s5p-common/pwm.c @@ -143,7 +143,7 @@ int pwm_init(int pwm_id, int div, int invert) u32 val; const struct s5p_timer *pwm = (struct s5p_timer *)samsung_get_base_timer(); - unsigned long timer_rate_hz; + unsigned long ticks_per_period; unsigned int offset, prescaler; /* @@ -167,20 +167,24 @@ int pwm_init(int pwm_id, int div, int invert) val |= (div & 0xf) << MUX_DIV_SHIFT(pwm_id); writel(val, &pwm->tcfg1); - timer_rate_hz = get_pwm_clk() / ((prescaler + 1) * - (div + 1)); + if (pwm_id == 4) { + /* + * TODO(sjg): Use this as a countdown timer for now. We count + * down from the maximum value to 0, then reset. + */ + ticks_per_period = -1UL; + } else { + const unsigned long pwm_hz = 1000; + unsigned long timer_rate_hz = get_pwm_clk() / + ((prescaler + 1) * (1 << div)); - timer_rate_hz = timer_rate_hz / CONFIG_SYS_HZ; + ticks_per_period = timer_rate_hz / pwm_hz; + } /* set count value */ offset = pwm_id * 3; - /* - * TODO(sjg): Use this as a countdown timer for now. We count down - * from the maximum value to 0, then reset. - */ - timer_rate_hz = -1; - writel(timer_rate_hz, &pwm->tcntb0 + offset); + writel(ticks_per_period, &pwm->tcntb0 + offset); val = readl(&pwm->tcon) & ~(0xf << TCON_OFFSET(pwm_id)); if (invert && (pwm_id < 4)) -- cgit v1.1 From 34b5ee1f6a7d01560f31be37dca3b2eb62877c50 Mon Sep 17 00:00:00 2001 From: Gabe Black Date: Thu, 28 Mar 2013 04:32:19 +0000 Subject: Exynos: Avoid a divide by zero by specifying a non-zero period for pwm 4 The pwm_config function in the exynos pwm driver divides by its period period parameter. A function was calling pwm_config with a 0ns period and a 0ns duty cycle. That doesn't actually make any sense physically, and results in a divide by zero in the driver. This change changes the parameters to be a 100000ns period and duty cycle. Test with command "sf probe 1:0; time sf read 40008000 0 1000". Try with different numbers of bytes and see that sane values are obtained Build and boot U-boot with this patch, backlight works properly. Signed-off-by: Gabe Black Signed-off-by: Akshay Saraswat Acked-by: Simon Glass Signed-off-by: Minkyu Kang --- arch/arm/cpu/armv7/s5p-common/timer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/arm') diff --git a/arch/arm/cpu/armv7/s5p-common/timer.c b/arch/arm/cpu/armv7/s5p-common/timer.c index de61405..6a0fa58 100644 --- a/arch/arm/cpu/armv7/s5p-common/timer.c +++ b/arch/arm/cpu/armv7/s5p-common/timer.c @@ -58,7 +58,7 @@ int timer_init(void) { /* PWM Timer 4 */ pwm_init(4, MUX_DIV_4, 0); - pwm_config(4, 0, 0); + pwm_config(4, 100000, 100000); pwm_enable(4); /* Use this as the current monotonic time in us */ -- cgit v1.1 From 92809eeed22e264a770fcfc34721d986fedcbfa2 Mon Sep 17 00:00:00 2001 From: Gabe Black Date: Thu, 28 Mar 2013 04:32:20 +0000 Subject: Exynos: Tidy up the pwm_config function in the exynos pwm driver Some small fixes in the exynos pwm driver: 1. NS_IN_HZ is non-sensical since these are not compatible units. This constant actually describes the number of nanoseconds in a second. Renamed it to NS_IN_SEC. Also dropped the unnecessary parenthesis. 2. The variable "period" is not used to hold a period, it's used to hold a frequency. Renamed it to "frequency". 3. tcmp is an unsigned value, so (tcmp < 0) will never be true and the if which checks that condition will never execute. Also, there should be no problem if the pwm never switches, so there's no reason to subtract one from tcmp and therefore no reason to compare it against zero. Removed both ifs. If they weren't removed, tcmp should be a signed value. 4. Add a check for a 0 period. Test with command "sf probe 1:0; time sf read 40008000 0 1000". Try with different numbers of bytes and see that sane values are obtained Build and boot U-boot with this patch, backlight works properly. Signed-off-by: Gabe Black Signed-off-by: Akshay Saraswat Acked-by: Simon Glass Signed-off-by: Minkyu Kang --- arch/arm/cpu/armv7/s5p-common/pwm.c | 22 ++++++---------------- 1 file changed, 6 insertions(+), 16 deletions(-) (limited to 'arch/arm') diff --git a/arch/arm/cpu/armv7/s5p-common/pwm.c b/arch/arm/cpu/armv7/s5p-common/pwm.c index 02156d1..6f401b8 100644 --- a/arch/arm/cpu/armv7/s5p-common/pwm.c +++ b/arch/arm/cpu/armv7/s5p-common/pwm.c @@ -70,7 +70,7 @@ static unsigned long pwm_calc_tin(int pwm_id, unsigned long freq) return tin_parent_rate / 16; } -#define NS_IN_HZ (1000000000UL) +#define NS_IN_SEC 1000000000UL int pwm_config(int pwm_id, int duty_ns, int period_ns) { @@ -79,7 +79,7 @@ int pwm_config(int pwm_id, int duty_ns, int period_ns) unsigned int offset; unsigned long tin_rate; unsigned long tin_ns; - unsigned long period; + unsigned long frequency; unsigned long tcon; unsigned long tcnt; unsigned long tcmp; @@ -89,34 +89,24 @@ int pwm_config(int pwm_id, int duty_ns, int period_ns) * fact that anything faster than 1GHz is easily representable * by 32bits. */ - if (period_ns > NS_IN_HZ || duty_ns > NS_IN_HZ) + if (period_ns > NS_IN_SEC || duty_ns > NS_IN_SEC || period_ns == 0) return -ERANGE; if (duty_ns > period_ns) return -EINVAL; - period = NS_IN_HZ / period_ns; + frequency = NS_IN_SEC / period_ns; /* Check to see if we are changing the clock rate of the PWM */ - tin_rate = pwm_calc_tin(pwm_id, period); + tin_rate = pwm_calc_tin(pwm_id, frequency); - tin_ns = NS_IN_HZ / tin_rate; + tin_ns = NS_IN_SEC / tin_rate; tcnt = period_ns / tin_ns; /* Note, counters count down */ tcmp = duty_ns / tin_ns; tcmp = tcnt - tcmp; - /* - * the pwm hw only checks the compare register after a decrement, - * so the pin never toggles if tcmp = tcnt - */ - if (tcmp == tcnt) - tcmp--; - - if (tcmp < 0) - tcmp = 0; - /* Update the PWM register block. */ offset = pwm_id * 3; if (pwm_id < 4) { -- cgit v1.1 From 394d64e45b5a889a670ee83bfda3ff4358cdaaee Mon Sep 17 00:00:00 2001 From: Padmavathi Venna Date: Sun, 31 Mar 2013 18:42:24 +0000 Subject: Exynos: Add peripherial id for pwm Add peripherial id for pwm inorder to support generic api to get the clk frequency Test with command "sf probe 1:0; time sf read 40008000 0 1000". Try with different numbers of bytes and see that sane values are obtained Build and boot U-boot with this patch, backlight works properly. Signed-off-by: Padmavathi Venna Signed-off-by: Akshay Saraswat Acked-by: Simon Glass Signed-off-by: Minkyu Kang --- arch/arm/include/asm/arch-exynos/periph.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arch/arm') diff --git a/arch/arm/include/asm/arch-exynos/periph.h b/arch/arm/include/asm/arch-exynos/periph.h index 89bcdfc..e5aed4b 100644 --- a/arch/arm/include/asm/arch-exynos/periph.h +++ b/arch/arm/include/asm/arch-exynos/periph.h @@ -61,6 +61,11 @@ enum periph_id { PERIPH_ID_SPI3, PERIPH_ID_SPI4, PERIPH_ID_SDMMC4, + PERIPH_ID_PWM0, + PERIPH_ID_PWM1, + PERIPH_ID_PWM2, + PERIPH_ID_PWM3, + PERIPH_ID_PWM4, PERIPH_ID_COUNT, PERIPH_ID_NONE = -1, -- cgit v1.1 From 12a46a384dac2eb0f879394ab39e89dec66df130 Mon Sep 17 00:00:00 2001 From: Padmavathi Venna Date: Thu, 28 Mar 2013 04:32:21 +0000 Subject: Exynos: clock: Add generic api to get the clk freq Add generic api to get the frequency of the required peripherial. This API gets the source clock frequency and returns the required frequency by dividing with first and second dividers based on the requirement. Test with command "sf probe 1:0; time sf read 40008000 0 1000". Try with different numbers of bytes and see that sane values are obtained Build and boot U-boot with this patch, backlight works properly. Signed-off-by: Padmavathi Venna Signed-off-by: Akshay Saraswat Acked-by: Simon Glass Signed-off-by: Minkyu Kang --- arch/arm/cpu/armv7/exynos/clock.c | 144 +++++++++++++++++++++++++++++++++ arch/arm/include/asm/arch-exynos/clk.h | 15 ++++ 2 files changed, 159 insertions(+) (limited to 'arch/arm') diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c index 956427c..5860c8f 100644 --- a/arch/arm/cpu/armv7/exynos/clock.c +++ b/arch/arm/cpu/armv7/exynos/clock.c @@ -27,6 +27,49 @@ #include #include +/* * + * This structure is to store the src bit, div bit and prediv bit + * positions of the peripheral clocks of the src and div registers + */ +struct clk_bit_info { + int8_t src_bit; + int8_t div_bit; + int8_t prediv_bit; +}; + +/* src_bit div_bit prediv_bit */ +static struct clk_bit_info clk_bit_info[PERIPH_ID_COUNT] = { + {0, 0, -1}, + {4, 4, -1}, + {8, 8, -1}, + {12, 12, -1}, + {0, 0, 8}, + {4, 16, 24}, + {8, 0, 8}, + {12, 16, 24}, + {-1, -1, -1}, + {16, 0, 8}, + {20, 16, 24}, + {24, 0, 8}, + {0, 0, 4}, + {4, 12, 16}, + {-1, -1, -1}, + {-1, -1, -1}, + {-1, 24, 0}, + {-1, 24, 0}, + {-1, 24, 0}, + {-1, 24, 0}, + {-1, 24, 0}, + {-1, 24, 0}, + {-1, 24, 0}, + {-1, 24, 0}, + {24, 0, -1}, + {24, 0, -1}, + {24, 0, -1}, + {24, 0, -1}, + {24, 0, -1}, +}; + /* Epll Clock division values to achive different frequency output */ static struct set_epll_con_val exynos5_epll_div[] = { { 192000000, 0, 48, 3, 1, 0 }, @@ -201,6 +244,107 @@ static unsigned long exynos5_get_pll_clk(int pllreg) return fout; } +static unsigned long exynos5_get_periph_rate(int peripheral) +{ + struct clk_bit_info *bit_info = &clk_bit_info[peripheral]; + unsigned long sclk, sub_clk; + unsigned int src, div, sub_div; + struct exynos5_clock *clk = + (struct exynos5_clock *)samsung_get_base_clock(); + + switch (peripheral) { + case PERIPH_ID_UART0: + case PERIPH_ID_UART1: + case PERIPH_ID_UART2: + case PERIPH_ID_UART3: + src = readl(&clk->src_peric0); + div = readl(&clk->div_peric0); + break; + case PERIPH_ID_PWM0: + case PERIPH_ID_PWM1: + case PERIPH_ID_PWM2: + case PERIPH_ID_PWM3: + case PERIPH_ID_PWM4: + src = readl(&clk->src_peric0); + div = readl(&clk->div_peric3); + break; + case PERIPH_ID_SPI0: + case PERIPH_ID_SPI1: + src = readl(&clk->src_peric1); + div = readl(&clk->div_peric1); + break; + case PERIPH_ID_SPI2: + src = readl(&clk->src_peric1); + div = readl(&clk->div_peric2); + break; + case PERIPH_ID_SPI3: + case PERIPH_ID_SPI4: + src = readl(&clk->sclk_src_isp); + div = readl(&clk->sclk_div_isp); + break; + case PERIPH_ID_SDMMC0: + case PERIPH_ID_SDMMC1: + case PERIPH_ID_SDMMC2: + case PERIPH_ID_SDMMC3: + src = readl(&clk->src_fsys); + div = readl(&clk->div_fsys1); + break; + case PERIPH_ID_I2C0: + case PERIPH_ID_I2C1: + case PERIPH_ID_I2C2: + case PERIPH_ID_I2C3: + case PERIPH_ID_I2C4: + case PERIPH_ID_I2C5: + case PERIPH_ID_I2C6: + case PERIPH_ID_I2C7: + sclk = exynos5_get_pll_clk(MPLL); + sub_div = ((readl(&clk->div_top1) >> bit_info->div_bit) + & 0x7) + 1; + div = ((readl(&clk->div_top0) >> bit_info->prediv_bit) + & 0x7) + 1; + return (sclk / sub_div) / div; + default: + debug("%s: invalid peripheral %d", __func__, peripheral); + return -1; + }; + + src = (src >> bit_info->src_bit) & 0xf; + + switch (src) { + case EXYNOS_SRC_MPLL: + sclk = exynos5_get_pll_clk(MPLL); + break; + case EXYNOS_SRC_EPLL: + sclk = exynos5_get_pll_clk(EPLL); + break; + case EXYNOS_SRC_VPLL: + sclk = exynos5_get_pll_clk(VPLL); + break; + default: + return 0; + } + + /* Ratio clock division for this peripheral */ + sub_div = (div >> bit_info->div_bit) & 0xf; + sub_clk = sclk / (sub_div + 1); + + /* Pre-ratio clock division for SDMMC0 and 2 */ + if (peripheral == PERIPH_ID_SDMMC0 || peripheral == PERIPH_ID_SDMMC2) { + div = (div >> bit_info->prediv_bit) & 0xff; + return sub_clk / (div + 1); + } + + return sub_clk; +} + +unsigned long clock_get_periph_rate(int peripheral) +{ + if (cpu_is_exynos5()) + return exynos5_get_periph_rate(peripheral); + else + return 0; +} + /* exynos4: return ARM clock frequency */ static unsigned long exynos4_get_arm_clk(void) { diff --git a/arch/arm/include/asm/arch-exynos/clk.h b/arch/arm/include/asm/arch-exynos/clk.h index 1935b0b..73f8063 100644 --- a/arch/arm/include/asm/arch-exynos/clk.h +++ b/arch/arm/include/asm/arch-exynos/clk.h @@ -29,6 +29,12 @@ #define VPLL 4 #define BPLL 5 +enum pll_src_bit { + EXYNOS_SRC_MPLL = 6, + EXYNOS_SRC_EPLL, + EXYNOS_SRC_VPLL, +}; + unsigned long get_pll_clk(int pllreg); unsigned long get_arm_clk(void); unsigned long get_i2c_clk(void); @@ -44,4 +50,13 @@ int set_i2s_clk_prescaler(unsigned int src_frq, unsigned int dst_frq); int set_epll_clk(unsigned long rate); int set_spi_clk(int periph_id, unsigned int rate); +/** + * get the clk frequency of the required peripheral + * + * @param peripheral Peripheral id + * + * @return frequency of the peripheral clk + */ +unsigned long clock_get_periph_rate(int peripheral); + #endif -- cgit v1.1 From e2338704c0ac63c73d295f941ac0cfd8e05bd076 Mon Sep 17 00:00:00 2001 From: Padmavathi Venna Date: Thu, 28 Mar 2013 04:32:23 +0000 Subject: Exynos: pwm: Use generic api to get pwm clk freq Use generic api to get the pwm clock frequency Test with command "sf probe 1:0; time sf read 40008000 0 1000". Try with different numbers of bytes and see that sane values are obtained Build and boot U-boot with this patch, backlight works properly. Signed-off-by: Padmavathi Venna Signed-off-by: Akshay Saraswat Acked-by: Simon Glass Signed-off-by: Minkyu Kang --- arch/arm/cpu/armv7/exynos/clock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/arm') diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c index 5860c8f..1e54e47 100644 --- a/arch/arm/cpu/armv7/exynos/clock.c +++ b/arch/arm/cpu/armv7/exynos/clock.c @@ -1354,7 +1354,7 @@ unsigned long get_i2c_clk(void) unsigned long get_pwm_clk(void) { if (cpu_is_exynos5()) - return exynos5_get_pwm_clk(); + return clock_get_periph_rate(PERIPH_ID_PWM0); else { if (proid_is_exynos4412()) return exynos4x12_get_pwm_clk(); -- cgit v1.1 From 07cd5c7495379bc791f226afca1ac244fc916c52 Mon Sep 17 00:00:00 2001 From: Akshay Saraswat Date: Thu, 28 Mar 2013 04:32:24 +0000 Subject: Exynos: pwm: Remove dead code of function exynos5_get_pwm_clk As we shall now be using clock_get_periph_rate function. We find no reason for keeping code in function exynos5_get_pwm_clk. Hence, removing it. Signed-off-by: Akshay Saraswat Signed-off-by: Minkyu Kang --- arch/arm/cpu/armv7/exynos/clock.c | 21 --------------------- 1 file changed, 21 deletions(-) (limited to 'arch/arm') diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c index 1e54e47..223660a 100644 --- a/arch/arm/cpu/armv7/exynos/clock.c +++ b/arch/arm/cpu/armv7/exynos/clock.c @@ -468,27 +468,6 @@ static unsigned long exynos4x12_get_pwm_clk(void) return pclk; } -/* exynos5: return pwm clock frequency */ -static unsigned long exynos5_get_pwm_clk(void) -{ - struct exynos5_clock *clk = - (struct exynos5_clock *)samsung_get_base_clock(); - unsigned long pclk, sclk; - unsigned int ratio; - - /* - * CLK_DIV_PERIC3 - * PWM_RATIO [3:0] - */ - ratio = readl(&clk->div_peric3); - ratio = ratio & 0xf; - sclk = get_pll_clk(MPLL); - - pclk = sclk / (ratio + 1); - - return pclk; -} - /* exynos4: return uart clock frequency */ static unsigned long exynos4_get_uart_clk(int dev_index) { -- cgit v1.1 From 4fdebefa453a58c7b4ca653ab40f7a9791aba6c9 Mon Sep 17 00:00:00 2001 From: Minkyu Kang Date: Mon, 1 Apr 2013 19:22:40 +0000 Subject: exynos: change indentation of defines in cpu.h Fix the indentation of some defines by tab. Signed-off-by: Minkyu Kang --- arch/arm/include/asm/arch-exynos/cpu.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'arch/arm') diff --git a/arch/arm/include/asm/arch-exynos/cpu.h b/arch/arm/include/asm/arch-exynos/cpu.h index 2a20558..f76e489 100644 --- a/arch/arm/include/asm/arch-exynos/cpu.h +++ b/arch/arm/include/asm/arch-exynos/cpu.h @@ -93,9 +93,9 @@ #define EXYNOS4X12_ADC_BASE DEVICE_NOT_AVAILABLE #define EXYNOS4X12_DP_BASE DEVICE_NOT_AVAILABLE #define EXYNOS4X12_MODEM_BASE DEVICE_NOT_AVAILABLE -#define EXYNOS4X12_I2S_BASE DEVICE_NOT_AVAILABLE -#define EXYNOS4X12_SPI_BASE DEVICE_NOT_AVAILABLE -#define EXYNOS4X12_SPI_ISP_BASE DEVICE_NOT_AVAILABLE +#define EXYNOS4X12_I2S_BASE DEVICE_NOT_AVAILABLE +#define EXYNOS4X12_SPI_BASE DEVICE_NOT_AVAILABLE +#define EXYNOS4X12_SPI_ISP_BASE DEVICE_NOT_AVAILABLE #define EXYNOS4X12_ACE_SFR_BASE DEVICE_NOT_AVAILABLE /* EXYNOS5 Common*/ -- cgit v1.1