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From: Roland Hieber <r.hieber@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Roland Hieber <r.hieber@pengutronix.de>
Subject: [PATCH 08/13] ARM: MXS: make power levels configurable in mx2*_power_init
Date: Wed, 25 Jul 2018 15:36:13 +0200	[thread overview]
Message-ID: <20180725133618.1510-9-r.hieber@pengutronix.de> (raw)
In-Reply-To: <20180725133618.1510-1-r.hieber@pengutronix.de>

Depending on the application, board code might want to configure
different power levels and brownout thresholds. They can do so now with
an additional struct mxs_power_ctrls* parameter to mx2*_power_init.

Note that VDDMEM was not set up explicitely in mx28_power_init, but can
now be configured. However, mx28_power_default->vddmem is NULL, so the
old behaviour is still the case when using those default values.

Signed-off-by: Roland Hieber <r.hieber@pengutronix.de>
---
 arch/arm/boards/duckbill/lowlevel.c           |  2 +-
 arch/arm/boards/freescale-mx28-evk/lowlevel.c |  3 +-
 arch/arm/boards/imx233-olinuxino/lowlevel.c   |  2 +-
 arch/arm/boards/karo-tx28/lowlevel.c          |  3 +-
 arch/arm/mach-mxs/include/mach/init.h         | 22 +++++++-
 arch/arm/mach-mxs/power-init.c                | 55 ++++++++++++++++---
 6 files changed, 72 insertions(+), 15 deletions(-)

diff --git a/arch/arm/boards/duckbill/lowlevel.c b/arch/arm/boards/duckbill/lowlevel.c
index ebda3aa047..cc9335dbaf 100644
--- a/arch/arm/boards/duckbill/lowlevel.c
+++ b/arch/arm/boards/duckbill/lowlevel.c
@@ -51,7 +51,7 @@ static noinline void duckbill_init(void)
 
 	pr_debug("initializing power...\n");
 
-	mx28_power_init(POWER_USE_5V);
+	mx28_power_init(POWER_USE_5V, &mx28_power_default);
 
 	pr_debug("initializing SDRAM...\n");
 
diff --git a/arch/arm/boards/freescale-mx28-evk/lowlevel.c b/arch/arm/boards/freescale-mx28-evk/lowlevel.c
index e5ae36a715..ae36671028 100644
--- a/arch/arm/boards/freescale-mx28-evk/lowlevel.c
+++ b/arch/arm/boards/freescale-mx28-evk/lowlevel.c
@@ -43,7 +43,8 @@ static noinline void freescale_mx28evk_init(void)
 
 	pr_debug("initializing power...\n");
 
-	mx28_power_init(POWER_USE_BATTERY_INPUT | POWER_ENABLE_4P2);
+	mx28_power_init(POWER_USE_BATTERY_INPUT | POWER_ENABLE_4P2,
+			&mx28_power_default);
 
 	pr_debug("initializing SDRAM...\n");
 
diff --git a/arch/arm/boards/imx233-olinuxino/lowlevel.c b/arch/arm/boards/imx233-olinuxino/lowlevel.c
index 7a3cea006e..baed338185 100644
--- a/arch/arm/boards/imx233-olinuxino/lowlevel.c
+++ b/arch/arm/boards/imx233-olinuxino/lowlevel.c
@@ -154,7 +154,7 @@ static noinline void imx23_olinuxino_init(void)
 
 	pr_debug("initializing power...\n");
 
-	mx23_power_init(POWER_USE_5V);
+	mx23_power_init(POWER_USE_5V, &mx23_power_default);
 
 	pr_debug("initializing SDRAM...\n");
 
diff --git a/arch/arm/boards/karo-tx28/lowlevel.c b/arch/arm/boards/karo-tx28/lowlevel.c
index 9e22f002da..cfc9248dea 100644
--- a/arch/arm/boards/karo-tx28/lowlevel.c
+++ b/arch/arm/boards/karo-tx28/lowlevel.c
@@ -43,7 +43,8 @@ static noinline void karo_tx28_init(void)
 
 	pr_debug("initializing power...\n");
 
-	mx28_power_init(POWER_USE_BATTERY_INPUT | POWER_ENABLE_4P2);
+	mx28_power_init(POWER_USE_BATTERY_INPUT | POWER_ENABLE_4P2,
+			&mx28_power_default);
 
 	pr_debug("initializing SDRAM...\n");
 
diff --git a/arch/arm/mach-mxs/include/mach/init.h b/arch/arm/mach-mxs/include/mach/init.h
index f2e19408d3..66f7f31e35 100644
--- a/arch/arm/mach-mxs/include/mach/init.h
+++ b/arch/arm/mach-mxs/include/mach/init.h
@@ -28,8 +28,26 @@ enum mxs_power_config {
 	POWER_ENABLE_4P2		= 0b00000100,
 };
 
-void mx23_power_init(const int config);
-void mx28_power_init(const int config);
+struct mxs_power_ctrl {
+	uint32_t target;	/*< target voltage */
+	uint32_t brownout;	/*< brownout threshhold */
+};
+struct mxs_power_ctrls {
+	struct mxs_power_ctrl * vdda;	/*< if non-null, set values for VDDA */
+	struct mxs_power_ctrl * vddd;	/*< if non-null, set values for VDDD */
+	struct mxs_power_ctrl * vddio;	/*< if non-null, set values for VDDIO */
+	struct mxs_power_ctrl * vddmem;	/*< if non-null, set values for VDDMEM */
+};
+
+extern struct mxs_power_ctrl mxs_vddio_default;
+extern struct mxs_power_ctrl mxs_vddd_default;
+extern struct mxs_power_ctrl mxs_vdda_default;
+extern struct mxs_power_ctrl mx23_vddmem_default;
+extern struct mxs_power_ctrls mx23_power_default;
+extern struct mxs_power_ctrls mx28_power_default;
+
+void mx23_power_init(const int config, struct mxs_power_ctrls *ctrls);
+void mx28_power_init(const int config, struct mxs_power_ctrls *ctrls);
 void mxs_power_wait_pswitch(void);
 
 extern const uint32_t mx28_dram_vals_default[190];
diff --git a/arch/arm/mach-mxs/power-init.c b/arch/arm/mach-mxs/power-init.c
index 2984c0c5ff..d4b88a4b2c 100644
--- a/arch/arm/mach-mxs/power-init.c
+++ b/arch/arm/mach-mxs/power-init.c
@@ -1165,6 +1165,17 @@ static void mx23_ungate_power(void)
 	writel(MX23_POWER_CTRL_CLKGATE, &power_regs->hw_power_ctrl_clr);
 }
 
+struct mxs_power_ctrl mxs_vddd_default    = { .target = 1500, .brownout = 1325 };
+struct mxs_power_ctrl mxs_vdda_default    = { .target = 1800, .brownout = 1650 };
+struct mxs_power_ctrl mxs_vddio_default   = { .target = 3300, .brownout = 3150 };
+struct mxs_power_ctrl mx23_vddmem_default = { .target = 2500, .brownout = 1700 };
+struct mxs_power_ctrls mx23_power_default = {
+	.vdda	= &mxs_vdda_default,
+	.vddd	= &mxs_vddd_default,
+	.vddio	= &mxs_vddio_default,
+	.vddmem	= &mx23_vddmem_default,
+};
+
 /**
  * mx23_power_init() - The power block init main function
  *
@@ -1172,8 +1183,9 @@ static void mx23_ungate_power(void)
  * proper sequence to start the power block.
  *
  * @config: see enum mxs_power_config for possible options
+ * @ctrls: a mxs_power_ctrls struct, or use &mx23_power_default for default values
  */
-void mx23_power_init(const int config)
+void mx23_power_init(const int config, struct mxs_power_ctrls *ctrls)
 {
 	struct mxs_power_regs *power_regs =
 		(struct mxs_power_regs *)IMX_POWER_BASE;
@@ -1210,10 +1222,18 @@ void mx23_power_init(const int config)
 
 	mxs_enable_output_rail_protection();
 
-	mxs_power_set_vddx(&mx23_vddio_cfg, 3300, 3150);
-	mxs_power_set_vddx(&mxs_vddd_cfg, 1500, 1325);
-	mxs_power_set_vddx(&mxs_vddmem_cfg, 2500, 1700);
-	mxs_power_set_vddx(&mxs_vdda_cfg, 1800, 1650);
+	if (ctrls->vddio)
+		mxs_power_set_vddx(&mx23_vddio_cfg, ctrls->vddio->target,
+				ctrls->vddio->brownout);
+	if (ctrls->vddd)
+		mxs_power_set_vddx(&mxs_vddd_cfg, ctrls->vddd->target,
+				ctrls->vddd->brownout);
+	if (ctrls->vddmem)
+		mxs_power_set_vddx(&mxs_vddmem_cfg, ctrls->vddmem->target,
+				ctrls->vddmem->brownout);
+	if (ctrls->vdda)
+		mxs_power_set_vddx(&mxs_vdda_cfg, ctrls->vdda->target,
+				ctrls->vdda->brownout);
 
 	writel(POWER_CTRL_VDDD_BO_IRQ | POWER_CTRL_VDDA_BO_IRQ |
 		POWER_CTRL_VDDIO_BO_IRQ | POWER_CTRL_VDD5V_DROOP_IRQ |
@@ -1225,6 +1245,13 @@ void mx23_power_init(const int config)
 	mxs_early_delay(1000);
 }
 
+struct mxs_power_ctrls mx28_power_default = {
+	.vdda	= &mxs_vdda_default,
+	.vddd	= &mxs_vddd_default,
+	.vddio	= &mxs_vddio_default,
+	.vddmem	= NULL,
+};
+
 /**
  * mx28_power_init() - The power block init main function
  *
@@ -1232,8 +1259,9 @@ void mx23_power_init(const int config)
  * proper sequence to start the power block.
  *
  * @config: see enum mxs_power_config for possible options
+ * @ctrls: a mxs_power_ctrls struct, or use &mx28_power_default for default values
  */
-void mx28_power_init(const int config)
+void mx28_power_init(const int config, struct mxs_power_ctrls *ctrls)
 {
 	struct mxs_power_regs *power_regs =
 		(struct mxs_power_regs *)IMX_POWER_BASE;
@@ -1265,9 +1293,18 @@ void mx28_power_init(const int config)
 
 	mxs_enable_output_rail_protection();
 
-	mxs_power_set_vddx(&mx28_vddio_cfg, 3300, 3150);
-	mxs_power_set_vddx(&mxs_vddd_cfg, 1500, 1325);
-	mxs_power_set_vddx(&mxs_vdda_cfg, 1800, 1650);
+	if (ctrls->vddio)
+		mxs_power_set_vddx(&mx28_vddio_cfg, ctrls->vddio->target,
+				ctrls->vddio->brownout);
+	if (ctrls->vddd)
+		mxs_power_set_vddx(&mxs_vddd_cfg, ctrls->vddd->target,
+				ctrls->vddd->brownout);
+	if (ctrls->vddmem)
+		mxs_power_set_vddx(&mxs_vddmem_cfg, ctrls->vddmem->target,
+				ctrls->vddmem->brownout);
+	if (ctrls->vdda)
+		mxs_power_set_vddx(&mxs_vdda_cfg, ctrls->vdda->target,
+				ctrls->vdda->brownout);
 
 	writel(POWER_CTRL_VDDD_BO_IRQ | POWER_CTRL_VDDA_BO_IRQ |
 		POWER_CTRL_VDDIO_BO_IRQ | POWER_CTRL_VDD5V_DROOP_IRQ |
-- 
2.18.0


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  parent reply	other threads:[~2018-07-25 13:36 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-25 13:36 [PATCH 00/13] MXS/MX28 low-level improvements Roland Hieber
2018-07-25 13:36 ` [PATCH 01/13] scripts: mxsimage: Allow unencrypted images Roland Hieber
2018-07-25 13:36 ` [PATCH 02/13] images: MXS: allow generation of unencrypted bootstreams Roland Hieber
2018-07-25 13:36 ` [PATCH 03/13] ARM: MXS: i.MX28: allow setup of low-voltage SDRAM Roland Hieber
2018-07-25 13:36 ` [PATCH 04/13] ARM: MXS: allow configuration of EMI clock dividers Roland Hieber
2018-08-08  6:41   ` Sascha Hauer
2018-07-25 13:36 ` [PATCH 05/13] ARM: MXS: i.MX28: add autodetection of memory banks Roland Hieber
2018-07-27  8:28   ` Roland Hieber
2018-07-31 10:07   ` Roland Hieber
2018-08-08  6:40     ` Sascha Hauer
2018-07-25 13:36 ` [PATCH 06/13] ARM: MXS: refactor mx2*_power_init source configuration Roland Hieber
2018-07-25 13:36 ` [PATCH 07/13] ARM: MXS: allow starting from battery input without 4P2 source enabled Roland Hieber
2018-07-25 13:36 ` Roland Hieber [this message]
2018-07-25 13:36 ` [PATCH 09/13] ARM: MXS: fix VDDx brownout setup logic Roland Hieber
2018-07-25 13:36 ` [PATCH 10/13] ARM: MXS: make VDDx brownout setup more understandable Roland Hieber
2018-07-25 13:36 ` [PATCH 11/13] ARM: MXS: mxs_power_status: use less magic values Roland Hieber
2018-07-25 13:36 ` [PATCH 12/13] ARM: MXS: mxs_power_status: align output Roland Hieber
2018-07-25 13:36 ` [PATCH 13/13] Documentation: MXS: general update and improvements Roland Hieber

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