Patchwork [U-Boot,2/9,v9] EXYNOS5: Implement board_poweroff for Thermal Management Unit

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Submitter Akshay Saraswat
Date Feb. 6, 2013, 1:18 p.m.
Message ID <1360156726-13315-3-git-send-email-akshay.s@samsung.com>
Download mbox | patch
Permalink /patch/218590/
State Superseded
Delegated to: Minkyu Kang
Headers show

Comments

Akshay Saraswat - Feb. 6, 2013, 1:18 p.m.
Adding API in power for system shutdown when tripping value is reached
in Exynos Thermal Management Unit.

Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
---
Changes since v8:
	- None.

 arch/arm/cpu/armv7/exynos/power.c        |   15 +++++++++++++++
 arch/arm/include/asm/arch-exynos/power.h |    1 +
 2 files changed, 16 insertions(+)
Minkyu Kang - Feb. 20, 2013, 8:38 a.m.
Dear Akshay,

On 06/02/13 22:18, Akshay Saraswat wrote:
> Adding API in power for system shutdown when tripping value is reached
> in Exynos Thermal Management Unit.
> 
> Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
> Acked-by: Simon Glass <sjg@chromium.org>
> ---
> Changes since v8:
> 	- None.
> 
>  arch/arm/cpu/armv7/exynos/power.c        |   15 +++++++++++++++
>  arch/arm/include/asm/arch-exynos/power.h |    1 +
>  2 files changed, 16 insertions(+)
> 
> diff --git a/arch/arm/cpu/armv7/exynos/power.c b/arch/arm/cpu/armv7/exynos/power.c
> index d4bce6d..73f764e 100644
> --- a/arch/arm/cpu/armv7/exynos/power.c
> +++ b/arch/arm/cpu/armv7/exynos/power.c
> @@ -95,3 +95,18 @@ void set_dp_phy_ctrl(unsigned int enable)
>  	if (cpu_is_exynos5())
>  		exynos5_dp_phy_control(enable);
>  }
> +
> +/*
> + * This function never returns.
> + * When called this function makes system hang and PAD driving value high
> + * which in turn makes system power down.
> + */
> +void board_poweroff(void)
> +{
> +	struct exynos5_power *power =
> +		(struct exynos5_power *)samsung_get_base_power();
> +
> +	clrbits_le32(&power->ps_hold_control, POWER_PS_HOLD_CONTROL_DATA_HIGH);
> +
> +	hang();
> +}

We can use set_ps_hold_ctrl function with little modification.
Could you please check this?

Thanks,
Minkyu Kang.

Patch

diff --git a/arch/arm/cpu/armv7/exynos/power.c b/arch/arm/cpu/armv7/exynos/power.c
index d4bce6d..73f764e 100644
--- a/arch/arm/cpu/armv7/exynos/power.c
+++ b/arch/arm/cpu/armv7/exynos/power.c
@@ -95,3 +95,18 @@  void set_dp_phy_ctrl(unsigned int enable)
 	if (cpu_is_exynos5())
 		exynos5_dp_phy_control(enable);
 }
+
+/*
+ * This function never returns.
+ * When called this function makes system hang and PAD driving value high
+ * which in turn makes system power down.
+ */
+void board_poweroff(void)
+{
+	struct exynos5_power *power =
+		(struct exynos5_power *)samsung_get_base_power();
+
+	clrbits_le32(&power->ps_hold_control, POWER_PS_HOLD_CONTROL_DATA_HIGH);
+
+	hang();
+}
diff --git a/arch/arm/include/asm/arch-exynos/power.h b/arch/arm/include/asm/arch-exynos/power.h
index d2fdb59..7463036 100644
--- a/arch/arm/include/asm/arch-exynos/power.h
+++ b/arch/arm/include/asm/arch-exynos/power.h
@@ -863,5 +863,6 @@  void set_usbhost_phy_ctrl(unsigned int enable);
 void set_dp_phy_ctrl(unsigned int enable);
 
 #define EXYNOS_DP_PHY_ENABLE		(1 << 0)
+#define POWER_PS_HOLD_CONTROL_DATA_HIGH         (1 << 8)
 
 #endif