From patchwork Mon Jul 20 13:17:07 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Kocialkowski X-Patchwork-Id: 497713 X-Patchwork-Delegate: trini@ti.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from theia.denx.de (theia.denx.de [85.214.87.163]) by ozlabs.org (Postfix) with ESMTP id 1C1C0140D26 for ; Mon, 20 Jul 2015 23:18:06 +1000 (AEST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 06DF84B635; Mon, 20 Jul 2015 15:17:58 +0200 (CEST) Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id DLyxkreWaq8F; Mon, 20 Jul 2015 15:17:57 +0200 (CEST) Received: from theia.denx.de (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 3B5154B688; Mon, 20 Jul 2015 15:17:52 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 516144B61F for ; Mon, 20 Jul 2015 15:17:47 +0200 (CEST) Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3O0cE05sesBY for ; Mon, 20 Jul 2015 15:17:47 +0200 (CEST) X-policyd-weight: NOT_IN_SBL_XBL_SPAMHAUS=-1.5 NOT_IN_SPAMCOP=-1.5 NOT_IN_BL_NJABL=-1.5 (only DNSBL check requested) Received: from gagarine.paulk.fr (gagarine.paulk.fr [109.190.93.129]) by theia.denx.de (Postfix) with ESMTPS id 6E71C4B64D for ; Mon, 20 Jul 2015 15:17:42 +0200 (CEST) Received: by gagarine.paulk.fr (Postfix, from userid 65534) id 342351FE16; Mon, 20 Jul 2015 15:17:42 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on gagarine.paulk.fr X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=none autolearn=unavailable autolearn_force=no version=3.4.0 Received: from armstrong.paulk.fr (armstrong.paulk.fr [82.233.88.171]) by gagarine.paulk.fr (Postfix) with ESMTPS id 12E6B1FE5A; Mon, 20 Jul 2015 15:17:23 +0200 (CEST) Received: from localhost.localdomain (aldrin [192.168.0.128]) by armstrong.paulk.fr (Postfix) with ESMTP id DA1F037829; Mon, 20 Jul 2015 15:17:21 +0200 (CEST) From: Paul Kocialkowski To: u-boot@lists.denx.de Date: Mon, 20 Jul 2015 15:17:07 +0200 Message-Id: <1437398238-27912-2-git-send-email-contact@paulk.fr> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1437398238-27912-1-git-send-email-contact@paulk.fr> References: <1437398238-27912-1-git-send-email-contact@paulk.fr> Cc: Tom Rini , Tom Rix , Przemyslaw Marczak Subject: [U-Boot] [PATCH 01/12] power: twl4030: Power off support X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.15 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" This adds support for powering off (the omap3 SoC) from the twl4030. This is especially useful when the kernel does not actually power off the device using this method but reboots and leaves it up to the bootloader to actually turn the power off. Reviewed-by: Tom Rini Acked-by: Przemyslaw Marczak Signed-off-by: Paul Kocialkowski --- drivers/power/twl4030.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++++ include/twl4030.h | 32 +++++++++++++++++++------- 2 files changed, 84 insertions(+), 8 deletions(-) diff --git a/drivers/power/twl4030.c b/drivers/power/twl4030.c index 7f1fdd1..8866bf1 100644 --- a/drivers/power/twl4030.c +++ b/drivers/power/twl4030.c @@ -46,6 +46,66 @@ void twl4030_power_reset_init(void) } /* + * Power off + */ +void twl4030_power_off(void) +{ + u8 data; + + /* PM master unlock (CFG and TST keys) */ + + data = 0xCE; + twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, + TWL4030_PM_MASTER_PROTECT_KEY, data); + data = 0xEC; + twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, + TWL4030_PM_MASTER_PROTECT_KEY, data); + + /* VBAT start disable */ + + twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER, + TWL4030_PM_MASTER_CFG_P1_TRANSITION, &data); + data &= ~TWL4030_PM_MASTER_CFG_TRANSITION_STARTON_VBAT; + twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, + TWL4030_PM_MASTER_CFG_P1_TRANSITION, data); + + twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER, + TWL4030_PM_MASTER_CFG_P2_TRANSITION, &data); + data &= ~TWL4030_PM_MASTER_CFG_TRANSITION_STARTON_VBAT; + twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, + TWL4030_PM_MASTER_CFG_P2_TRANSITION, data); + + twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER, + TWL4030_PM_MASTER_CFG_P3_TRANSITION, &data); + data &= ~TWL4030_PM_MASTER_CFG_TRANSITION_STARTON_VBAT; + twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, + TWL4030_PM_MASTER_CFG_P3_TRANSITION, data); + + /* High jitter for PWRANA2 */ + + twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER, + TWL4030_PM_MASTER_CFG_PWRANA2, &data); + data &= ~(TWL4030_PM_MASTER_CFG_PWRANA2_LOJIT0_LOWV | + TWL4030_PM_MASTER_CFG_PWRANA2_LOJIT1_LOWV); + twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, + TWL4030_PM_MASTER_CFG_PWRANA2, data); + + /* PM master lock */ + + data = 0xFF; + twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, + TWL4030_PM_MASTER_PROTECT_KEY, data); + + /* Power off */ + + twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER, + TWL4030_PM_MASTER_P1_SW_EVENTS, &data); + data |= TWL4030_PM_MASTER_SW_EVENTS_DEVOFF; + twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, + TWL4030_PM_MASTER_P1_SW_EVENTS, data); +} + +/* * Set Device Group and Voltage */ void twl4030_pmrecv_vsel_cfg(u8 vsel_reg, u8 vsel_val, diff --git a/include/twl4030.h b/include/twl4030.h index 50f8da8..2d0ca18 100644 --- a/include/twl4030.h +++ b/include/twl4030.h @@ -129,14 +129,6 @@ #define TWL4030_PM_MASTER_BB_CFG 0x6D #define TWL4030_PM_MASTER_MISC_TST 0x6E #define TWL4030_PM_MASTER_TRIM1 0x6F -/* P[1-3]_SW_EVENTS */ -#define TWL4030_PM_MASTER_SW_EVENTS_STOPON_PWRON (1 << 6) -#define TWL4030_PM_MASTER_SW_EVENTS_STOPON_SYSEN (1 << 5) -#define TWL4030_PM_MASTER_SW_EVENTS_ENABLE_WARMRESET (1 << 4) -#define TWL4030_PM_MASTER_SW_EVENTS_LVL_WAKEUP (1 << 3) -#define TWL4030_PM_MASTER_SW_EVENTS_DEVACT (1 << 2) -#define TWL4030_PM_MASTER_SW_EVENTS_DEVSLP (1 << 1) -#define TWL4030_PM_MASTER_SW_EVENTS_DEVOFF (1 << 0) /* Power bus message definitions */ @@ -207,6 +199,28 @@ /* Power Reference */ #define RES_Main_Ref 28 +/* P[1-3]_SW_EVENTS */ +#define TWL4030_PM_MASTER_SW_EVENTS_STOPON_PWRON (1 << 6) +#define TWL4030_PM_MASTER_SW_EVENTS_STOPON_SYSEN (1 << 5) +#define TWL4030_PM_MASTER_SW_EVENTS_ENABLE_WARMRESET (1 << 4) +#define TWL4030_PM_MASTER_SW_EVENTS_LVL_WAKEUP (1 << 3) +#define TWL4030_PM_MASTER_SW_EVENTS_DEVACT (1 << 2) +#define TWL4030_PM_MASTER_SW_EVENTS_DEVSLP (1 << 1) +#define TWL4030_PM_MASTER_SW_EVENTS_DEVOFF (1 << 0) + +/* Power transition */ +#define TWL4030_PM_MASTER_CFG_TRANSITION_STARTON_PWON (1 << 0) +#define TWL4030_PM_MASTER_CFG_TRANSITION_STARTON_CHG (1 << 1) +#define TWL4030_PM_MASTER_CFG_TRANSITION_STARTON_USB (1 << 2) +#define TWL4030_PM_MASTER_CFG_TRANSITION_STARTON_RTC (1 << 3) +#define TWL4030_PM_MASTER_CFG_TRANSITION_STARTON_VBAT (1 << 4) +#define TWL4030_PM_MASTER_CFG_TRANSITION_STARTON_VBUS (1 << 5) +#define TWL4030_PM_MASTER_CFG_TRANSITION_STARTON_SWBUG (1 << 7) + +/* PWRANA2 */ +#define TWL4030_PM_MASTER_CFG_PWRANA2_LOJIT0_LOWV (1 << 1) +#define TWL4030_PM_MASTER_CFG_PWRANA2_LOJIT1_LOWV (1 << 2) + #define TOTAL_RESOURCES 28 /* * Power Bus Message Format ... these can be sent individually by Linux, @@ -645,6 +659,8 @@ static inline int twl4030_i2c_read_u8(u8 chip_no, u8 reg, u8 *val) /* For hardware resetting */ void twl4030_power_reset_init(void); +/* For power off */ +void twl4030_power_off(void); /* For setting device group and voltage */ void twl4030_pmrecv_vsel_cfg(u8 vsel_reg, u8 vsel_val, u8 dev_grp, u8 dev_grp_sel);