[PATCH v5 00/14] ahci: library-ise ahci_platform, add sunxi driver and cleanup imx driver

[PATCH v5 00/14] ahci: library-ise ahci_platform, add sunxi driver and cleanup imx driver

[Hans de Goede]

Hi all,

Here is v4 of my patchset for adding ahci-sunxi support. It has grown quite
a bit since I've been going for a more generic approach this time and I've
also cleaned up the ahci-imx driver to use the same generic approach.

History:

v1, by Olliver Schinagl:
This was using the approach of having a platform device which probe method
creates a new child platform device which gets driven by ahci_platform.c,
as done by ahci_imx.c .

v2, by Hans de Goede:
Stand-alone platform driver based on Olliver's work

v3, by Hans de Goede:
patch-series, with 4 different parts
a) Make ahci_platform.c more generic, handle more then 1 clk, target pwr
   regulator
b) New ahci-sunxi code only populating ahci_platform_data, passed to
   ahci_platform.c to of_device_id matching.
c) Refactor ahci-imx code to work the same as the new ahci-sunxi code, this
   is the reason why v3 is an RFC, I'm waiting for the wandboard I ordered to
   arrive so that I can actually test this.
d) dts bindings for the sunxi ahci parts

v4, by Hans de Goede:
patch-series, with 5 different parts:
a) Make ahci_platform.c more generic, handle more then 1 clk, target pwr
   regulator
b) Turn parts of ahci_platform.c into a library for use by other drivers
c) New ahci-sunxi driver using the ahci_platform.c library functionality
d) Refactor ahci-imx code to work the same as the new ahci-sunxi code
e) dts bindings for the sunxi ahci parts

v5:
v4 + the following changes:
1) fsl,imx6q driver is now tested
2) fixed suspend / resume on fsl,imx6q
3) Modifed devicetree node naming to match dt spec
4) Reworked the busy waiting code in the sunxi-phy handling as suggested by
   Russell King

Parts a-d are intended for merging through the ata tree, the dts bindings
will be merged to Maxime Ripard's sunxi-dts tree.

Regards,

Hans

[PATCH v5 01/14] libahci: Allow drivers to override start_engine

[Hans de Goede]

Allwinner A10 and A20 ARM SoCs have an AHCI sata controller which needs a
special register to be poked before starting the DMA engine.

This register gets reset on an ahci_stop_engine call, so there is no other
place then ahci_start_engine where this poking can be done.

This commit allows drivers to override ahci_start_engine behavior for use by
the Allwinner AHCI driver (and potentially other drivers in the future).

Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
 drivers/ata/ahci.c          |  6 ++++--
 drivers/ata/ahci.h          |  3 ++-
 drivers/ata/libahci.c       | 27 ++++++++++++++++++---------
 drivers/ata/sata_highbank.c |  3 ++-
 4 files changed, 26 insertions(+), 13 deletions(-)

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index c0ed4f27..bb4c903 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -559,6 +559,7 @@ static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class,
 				 unsigned long deadline)
 {
 	struct ata_port *ap = link->ap;
+	struct ahci_host_priv *hpriv = ap->host->private_data;
 	bool online;
 	int rc;
 
@@ -569,7 +570,7 @@ static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class,
 	rc = sata_link_hardreset(link, sata_ehc_deb_timing(&link->eh_context),
 				 deadline, &online, NULL);
 
-	ahci_start_engine(ap);
+	hpriv->start_engine(ap);
 
 	DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
 
@@ -584,6 +585,7 @@ static int ahci_p5wdh_hardreset(struct ata_link *link, unsigned int *class,
 {
 	struct ata_port *ap = link->ap;
 	struct ahci_port_priv *pp = ap->private_data;
+	struct ahci_host_priv *hpriv = ap->host->private_data;
 	u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
 	struct ata_taskfile tf;
 	bool online;
@@ -599,7 +601,7 @@ static int ahci_p5wdh_hardreset(struct ata_link *link, unsigned int *class,
 	rc = sata_link_hardreset(link, sata_ehc_deb_timing(&link->eh_context),
 				 deadline, &online, NULL);
 
-	ahci_start_engine(ap);
+	hpriv->start_engine(ap);
 
 	/* The pseudo configuration device on SIMG4726 attached to
 	 * ASUS P5W-DH Deluxe doesn't send signature FIS after
diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index 2289efd..2c04211 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -323,6 +323,8 @@ struct ahci_host_priv {
 	u32			em_msg_type;	/* EM message type */
 	struct clk		*clk;		/* Only for platforms supporting clk */
 	void			*plat_data;	/* Other platform data */
+	/* Optional ahci_start_engine override */
+	void			(*start_engine)(struct ata_port *ap);
 };
 
 extern int ahci_ignore_sss;
@@ -357,7 +359,6 @@ int ahci_do_softreset(struct ata_link *link, unsigned int *class,
 		      int (*check_ready)(struct ata_link *link));
 
 int ahci_stop_engine(struct ata_port *ap);
-void ahci_start_engine(struct ata_port *ap);
 int ahci_check_ready(struct ata_link *link);
 int ahci_kick_engine(struct ata_port *ap);
 int ahci_port_resume(struct ata_port *ap);
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index c482f8c..96d128c 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -69,6 +69,7 @@ static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
 
 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
+static void ahci_start_engine(struct ata_port *ap);
 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc);
 static int ahci_port_start(struct ata_port *ap);
@@ -500,6 +501,9 @@ void ahci_save_initial_config(struct device *dev,
 	hpriv->cap = cap;
 	hpriv->cap2 = cap2;
 	hpriv->port_map = port_map;
+
+	if (!hpriv->start_engine)
+		hpriv->start_engine = ahci_start_engine;
 }
 EXPORT_SYMBOL_GPL(ahci_save_initial_config);
 
@@ -565,7 +569,7 @@ static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
 	return -EINVAL;
 }
 
-void ahci_start_engine(struct ata_port *ap)
+static void ahci_start_engine(struct ata_port *ap)
 {
 	void __iomem *port_mmio = ahci_port_base(ap);
 	u32 tmp;
@@ -576,7 +580,6 @@ void ahci_start_engine(struct ata_port *ap)
 	writel(tmp, port_mmio + PORT_CMD);
 	readl(port_mmio + PORT_CMD); /* flush */
 }
-EXPORT_SYMBOL_GPL(ahci_start_engine);
 
 int ahci_stop_engine(struct ata_port *ap)
 {
@@ -766,7 +769,7 @@ static void ahci_start_port(struct ata_port *ap)
 
 	/* enable DMA */
 	if (!(hpriv->flags & AHCI_HFLAG_DELAY_ENGINE))
-		ahci_start_engine(ap);
+		hpriv->start_engine(ap);
 
 	/* turn on LEDs */
 	if (ap->flags & ATA_FLAG_EM) {
@@ -1234,7 +1237,7 @@ int ahci_kick_engine(struct ata_port *ap)
 
 	/* restart engine */
  out_restart:
-	ahci_start_engine(ap);
+	hpriv->start_engine(ap);
 	return rc;
 }
 EXPORT_SYMBOL_GPL(ahci_kick_engine);
@@ -1426,6 +1429,7 @@ static int ahci_hardreset(struct ata_link *link, unsigned int *class,
 	const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
 	struct ata_port *ap = link->ap;
 	struct ahci_port_priv *pp = ap->private_data;
+	struct ahci_host_priv *hpriv = ap->host->private_data;
 	u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
 	struct ata_taskfile tf;
 	bool online;
@@ -1443,7 +1447,7 @@ static int ahci_hardreset(struct ata_link *link, unsigned int *class,
 	rc = sata_link_hardreset(link, timing, deadline, &online,
 				 ahci_check_ready);
 
-	ahci_start_engine(ap);
+	hpriv->start_engine(ap);
 
 	if (online)
 		*class = ahci_dev_classify(ap);
@@ -2007,10 +2011,12 @@ static void ahci_thaw(struct ata_port *ap)
 
 void ahci_error_handler(struct ata_port *ap)
 {
+	struct ahci_host_priv *hpriv = ap->host->private_data;
+
 	if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
 		/* restart engine */
 		ahci_stop_engine(ap);
-		ahci_start_engine(ap);
+		hpriv->start_engine(ap);
 	}
 
 	sata_pmp_error_handler(ap);
@@ -2031,6 +2037,7 @@ static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
 
 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep)
 {
+	struct ahci_host_priv *hpriv = ap->host->private_data;
 	void __iomem *port_mmio = ahci_port_base(ap);
 	struct ata_device *dev = ap->link.device;
 	u32 devslp, dm, dito, mdat, deto;
@@ -2094,7 +2101,7 @@ static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep)
 		   PORT_DEVSLP_ADSE);
 	writel(devslp, port_mmio + PORT_DEVSLP);
 
-	ahci_start_engine(ap);
+	hpriv->start_engine(ap);
 
 	/* enable device sleep feature for the drive */
 	err_mask = ata_dev_set_feature(dev,
@@ -2106,6 +2113,7 @@ static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep)
 
 static void ahci_enable_fbs(struct ata_port *ap)
 {
+	struct ahci_host_priv *hpriv = ap->host->private_data;
 	struct ahci_port_priv *pp = ap->private_data;
 	void __iomem *port_mmio = ahci_port_base(ap);
 	u32 fbs;
@@ -2134,11 +2142,12 @@ static void ahci_enable_fbs(struct ata_port *ap)
 	} else
 		dev_err(ap->host->dev, "Failed to enable FBS\n");
 
-	ahci_start_engine(ap);
+	hpriv->start_engine(ap);
 }
 
 static void ahci_disable_fbs(struct ata_port *ap)
 {
+	struct ahci_host_priv *hpriv = ap->host->private_data;
 	struct ahci_port_priv *pp = ap->private_data;
 	void __iomem *port_mmio = ahci_port_base(ap);
 	u32 fbs;
@@ -2166,7 +2175,7 @@ static void ahci_disable_fbs(struct ata_port *ap)
 		pp->fbs_enabled = false;
 	}
 
-	ahci_start_engine(ap);
+	hpriv->start_engine(ap);
 }
 
 static void ahci_pmp_attach(struct ata_port *ap)
diff --git a/drivers/ata/sata_highbank.c b/drivers/ata/sata_highbank.c
index ea3b3dc..30aa9c1 100644
--- a/drivers/ata/sata_highbank.c
+++ b/drivers/ata/sata_highbank.c
@@ -404,6 +404,7 @@ static int ahci_highbank_hardreset(struct ata_link *link, unsigned int *class,
 	static const unsigned long timing[] = { 5, 100, 500};
 	struct ata_port *ap = link->ap;
 	struct ahci_port_priv *pp = ap->private_data;
+	struct ahci_host_priv *hpriv = ap->host->private_data;
 	u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
 	struct ata_taskfile tf;
 	bool online;
@@ -432,7 +433,7 @@ static int ahci_highbank_hardreset(struct ata_link *link, unsigned int *class,
 			break;
 	} while (!online && retry--);
 
-	ahci_start_engine(ap);
+	hpriv->start_engine(ap);
 
 	if (online)
 		*class = ahci_dev_classify(ap);
-- 
1.8.5.3

[PATCH v5 02/14] libahci: Move ahci_host_priv declaration to include/linux/ahci.h

[Hans de Goede]

With the ahci-platform.c changes later in this patch-set, some
arch/arm/mach-foo/*.c sata drivers need access to ahci_host_priv, so move
its declaration outside of drivers/ata.

Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
 drivers/ata/ahci.h   | 20 +-------------------
 include/linux/ahci.h | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+), 19 deletions(-)
 create mode 100644 include/linux/ahci.h

diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index 2c04211..0f80129 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -35,7 +35,7 @@
 #ifndef _AHCI_H
 #define _AHCI_H
 
-#include <linux/clk.h>
+#include <linux/ahci.h>
 #include <linux/libata.h>
 
 /* Enclosure Management Control */
@@ -309,24 +309,6 @@ struct ahci_port_priv {
 	char			*irq_desc;	/* desc in /proc/interrupts */
 };
 
-struct ahci_host_priv {
-	void __iomem *		mmio;		/* bus-independent mem map */
-	unsigned int		flags;		/* AHCI_HFLAG_* */
-	u32			cap;		/* cap to use */
-	u32			cap2;		/* cap2 to use */
-	u32			port_map;	/* port map to use */
-	u32			saved_cap;	/* saved initial cap */
-	u32			saved_cap2;	/* saved initial cap2 */
-	u32			saved_port_map;	/* saved initial port_map */
-	u32 			em_loc; /* enclosure management location */
-	u32			em_buf_sz;	/* EM buffer size in byte */
-	u32			em_msg_type;	/* EM message type */
-	struct clk		*clk;		/* Only for platforms supporting clk */
-	void			*plat_data;	/* Other platform data */
-	/* Optional ahci_start_engine override */
-	void			(*start_engine)(struct ata_port *ap);
-};
-
 extern int ahci_ignore_sss;
 
 extern struct device_attribute *ahci_shost_attrs[];
diff --git a/include/linux/ahci.h b/include/linux/ahci.h
new file mode 100644
index 0000000..3499d44
--- /dev/null
+++ b/include/linux/ahci.h
@@ -0,0 +1,46 @@
+/*
+ *  ahci.h - Common AHCI SATA definitions and declarations
+ *
+ *  Maintained by:  Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
+ *                  Please ALWAYS copy linux-ide-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
+ *                  on emails.
+ *
+ *  Copyright 2004-2005 Red Hat, Inc.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2, or (at your option)
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ */
+
+#ifndef __LINUX_AHCI_H__
+#define __LINUX_AHCI_H__
+
+#include <linux/clk.h>
+
+struct ata_port;
+
+struct ahci_host_priv {
+	void __iomem		*mmio;		/* bus-independent mem map */
+	unsigned int		flags;		/* AHCI_HFLAG_* */
+	u32			cap;		/* cap to use */
+	u32			cap2;		/* cap2 to use */
+	u32			port_map;	/* port map to use */
+	u32			saved_cap;	/* saved initial cap */
+	u32			saved_cap2;	/* saved initial cap2 */
+	u32			saved_port_map;	/* saved initial port_map */
+	u32			em_loc; /* enclosure management location */
+	u32			em_buf_sz;	/* EM buffer size in byte */
+	u32			em_msg_type;	/* EM message type */
+	struct clk		*clk;		/* Optional */
+	void			*plat_data;	/* Other platform data */
+	/* Optional ahci_start_engine override */
+	void			(*start_engine)(struct ata_port *ap);
+};
+
+#endif
-- 
1.8.5.3

[PATCH v5 03/14] ahci-platform: Pass ahci_host_priv ptr to ahci_platform_data init method

[Hans de Goede]

Some ahci_platform_data->init methods need access to the ahci_host_priv data.

When calling ahci_platform_data->init the ata_host has not been allocated yet,
so access to ahci_host_priv through the dev argument is not possible.

Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
 arch/arm/mach-davinci/devices-da8xx.c |  5 +++--
 arch/arm/mach-spear/spear1340.c       |  2 +-
 drivers/ata/ahci_imx.c                | 12 ++++++------
 drivers/ata/ahci_platform.c           |  2 +-
 include/linux/ahci_platform.h         |  3 ++-
 5 files changed, 13 insertions(+), 11 deletions(-)

diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c
index 78829c5..28e7c4c 100644
--- a/arch/arm/mach-davinci/devices-da8xx.c
+++ b/arch/arm/mach-davinci/devices-da8xx.c
@@ -14,6 +14,7 @@
 #include <linux/platform_device.h>
 #include <linux/dma-contiguous.h>
 #include <linux/serial_8250.h>
+#include <linux/ahci.h>
 #include <linux/ahci_platform.h>
 #include <linux/clk.h>
 #include <linux/reboot.h>
@@ -1061,7 +1062,7 @@ static unsigned long da850_sata_xtal[] = {
 	KHZ_TO_HZ(60000),
 };
 
-static int da850_sata_init(struct device *dev, void __iomem *addr)
+static int da850_sata_init(struct device *dev, struct ahci_host_priv *hpriv)
 {
 	int i, ret;
 	unsigned int val;
@@ -1096,7 +1097,7 @@ static int da850_sata_init(struct device *dev, void __iomem *addr)
 		SATA_PHY_TXSWING(3) |
 		SATA_PHY_ENPLL(1);
 
-	__raw_writel(val, addr + SATA_P0PHYCR_REG);
+	__raw_writel(val, hpriv->mmio + SATA_P0PHYCR_REG);
 
 	return 0;
 
diff --git a/arch/arm/mach-spear/spear1340.c b/arch/arm/mach-spear/spear1340.c
index 3fb6834..9e2f3ac 100644
--- a/arch/arm/mach-spear/spear1340.c
+++ b/arch/arm/mach-spear/spear1340.c
@@ -77,7 +77,7 @@
 			SPEAR1340_MIPHY_PLL_RATIO_TOP(25))
 
 /* SATA device registration */
-static int sata_miphy_init(struct device *dev, void __iomem *addr)
+static int sata_miphy_init(struct device *dev, struct ahci_host_priv *hpriv)
 {
 	writel(SPEAR1340_SATA_CFG_VAL, SPEAR1340_PCIE_SATA_CFG);
 	writel(SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK,
diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c
index 3e23e99..49fa0ca 100644
--- a/drivers/ata/ahci_imx.c
+++ b/drivers/ata/ahci_imx.c
@@ -91,7 +91,7 @@ static const struct ata_port_info ahci_imx_port_info = {
 	.port_ops	= &ahci_imx_ops,
 };
 
-static int imx6q_sata_init(struct device *dev, void __iomem *mmio)
+static int imx6q_sata_init(struct device *dev, struct ahci_host_priv *hpriv)
 {
 	int ret = 0;
 	unsigned int reg_val;
@@ -145,19 +145,19 @@ static int imx6q_sata_init(struct device *dev, void __iomem *mmio)
 	 * Implement the port0.
 	 * Get the ahb clock rate, and configure the TIMER1MS register.
 	 */
-	reg_val = readl(mmio + HOST_CAP);
+	reg_val = readl(hpriv->mmio + HOST_CAP);
 	if (!(reg_val & HOST_CAP_SSS)) {
 		reg_val |= HOST_CAP_SSS;
-		writel(reg_val, mmio + HOST_CAP);
+		writel(reg_val, hpriv->mmio + HOST_CAP);
 	}
-	reg_val = readl(mmio + HOST_PORTS_IMPL);
+	reg_val = readl(hpriv->mmio + HOST_PORTS_IMPL);
 	if (!(reg_val & 0x1)) {
 		reg_val |= 0x1;
-		writel(reg_val, mmio + HOST_PORTS_IMPL);
+		writel(reg_val, hpriv->mmio + HOST_PORTS_IMPL);
 	}
 
 	reg_val = clk_get_rate(imxpriv->ahb_clk) / 1000;
-	writel(reg_val, mmio + HOST_TIMER1MS);
+	writel(reg_val, hpriv->mmio + HOST_TIMER1MS);
 
 	return 0;
 }
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 4b231ba..434ab89 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -149,7 +149,7 @@ static int ahci_probe(struct platform_device *pdev)
 	 * returned successfully.
 	 */
 	if (pdata && pdata->init) {
-		rc = pdata->init(dev, hpriv->mmio);
+		rc = pdata->init(dev, hpriv);
 		if (rc)
 			goto disable_unprepare_clk;
 	}
diff --git a/include/linux/ahci_platform.h b/include/linux/ahci_platform.h
index 73a2500..737fe38 100644
--- a/include/linux/ahci_platform.h
+++ b/include/linux/ahci_platform.h
@@ -19,9 +19,10 @@
 
 struct device;
 struct ata_port_info;
+struct ahci_host_priv;
 
 struct ahci_platform_data {
-	int (*init)(struct device *dev, void __iomem *addr);
+	int (*init)(struct device *dev, struct ahci_host_priv *hpriv);
 	void (*exit)(struct device *dev);
 	int (*suspend)(struct device *dev);
 	int (*resume)(struct device *dev);
-- 
1.8.5.3

[PATCH v5 04/14] ahci-platform: Add support for devices with more then 1 clock

[Hans de Goede]

The allwinner-sun4i AHCI controller needs 2 clocks to be enabled and the
imx AHCI controller needs 3 clocks to be enabled.

Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
 .../devicetree/bindings/ata/ahci-platform.txt      |  1 +
 drivers/ata/ahci_platform.c                        | 97 +++++++++++++++-------
 include/linux/ahci.h                               |  4 +-
 include/linux/ahci_platform.h                      |  3 +
 4 files changed, 73 insertions(+), 32 deletions(-)

diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.txt b/Documentation/devicetree/bindings/ata/ahci-platform.txt
index 89de156..3ced07d 100644
--- a/Documentation/devicetree/bindings/ata/ahci-platform.txt
+++ b/Documentation/devicetree/bindings/ata/ahci-platform.txt
@@ -10,6 +10,7 @@ Required properties:
 
 Optional properties:
 - dma-coherent      : Present if dma operations are coherent
+- clocks            : a list of phandle + clock specifier pairs
 
 Example:
         sata@ffe08000 {
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 434ab89..aaa0c08 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -87,6 +87,44 @@ static struct scsi_host_template ahci_platform_sht = {
 	AHCI_SHT("ahci_platform"),
 };
 
+
+int ahci_platform_enable_clks(struct ahci_host_priv *hpriv)
+{
+	int c, rc;
+
+	for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++) {
+		rc = clk_prepare_enable(hpriv->clks[c]);
+		if (rc)
+			goto disable_unprepare_clk;
+	}
+	return 0;
+
+disable_unprepare_clk:
+	while (--c >= 0)
+		clk_disable_unprepare(hpriv->clks[c]);
+	return rc;
+}
+EXPORT_SYMBOL_GPL(ahci_platform_enable_clks);
+
+void ahci_platform_disable_clks(struct ahci_host_priv *hpriv)
+{
+	int c;
+
+	for (c = AHCI_MAX_CLKS - 1; c >= 0; c--)
+		if (hpriv->clks[c])
+			clk_disable_unprepare(hpriv->clks[c]);
+}
+EXPORT_SYMBOL_GPL(ahci_platform_disable_clks);
+
+
+static void ahci_put_clks(struct ahci_host_priv *hpriv)
+{
+	int c;
+
+	for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++)
+		clk_put(hpriv->clks[c]);
+}
+
 static int ahci_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -97,10 +135,8 @@ static int ahci_probe(struct platform_device *pdev)
 	struct ahci_host_priv *hpriv;
 	struct ata_host *host;
 	struct resource *mem;
-	int irq;
-	int n_ports;
-	int i;
-	int rc;
+	struct clk *clk;
+	int i, irq, max_clk, n_ports, rc;
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!mem) {
@@ -131,17 +167,26 @@ static int ahci_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
-	hpriv->clk = clk_get(dev, NULL);
-	if (IS_ERR(hpriv->clk)) {
-		dev_err(dev, "can't get clock\n");
-	} else {
-		rc = clk_prepare_enable(hpriv->clk);
-		if (rc) {
-			dev_err(dev, "clock prepare enable failed");
-			goto free_clk;
+	max_clk = dev->of_node ? AHCI_MAX_CLKS : 1;
+	for (i = 0; i < max_clk; i++) {
+		if (i == 0)
+			clk = clk_get(dev, NULL); /* For old platform init */
+		else
+			clk = of_clk_get(dev->of_node, i);
+
+		if (IS_ERR(clk)) {
+			rc = PTR_ERR(clk);
+			if (rc == -EPROBE_DEFER)
+				goto free_clk;
+			break;
 		}
+		hpriv->clks[i] = clk;
 	}
 
+	rc = ahci_enable_clks(dev, hpriv);
+	if (rc)
+		goto free_clk;
+
 	/*
 	 * Some platforms might need to prepare for mmio region access,
 	 * which could be done in the following init call. So, the mmio
@@ -222,11 +267,9 @@ pdata_exit:
 	if (pdata && pdata->exit)
 		pdata->exit(dev);
 disable_unprepare_clk:
-	if (!IS_ERR(hpriv->clk))
-		clk_disable_unprepare(hpriv->clk);
+	ahci_disable_clks(hpriv);
 free_clk:
-	if (!IS_ERR(hpriv->clk))
-		clk_put(hpriv->clk);
+	ahci_put_clks(hpriv);
 	return rc;
 }
 
@@ -239,10 +282,8 @@ static void ahci_host_stop(struct ata_host *host)
 	if (pdata && pdata->exit)
 		pdata->exit(dev);
 
-	if (!IS_ERR(hpriv->clk)) {
-		clk_disable_unprepare(hpriv->clk);
-		clk_put(hpriv->clk);
-	}
+	ahci_disable_clks(hpriv);
+	ahci_put_clks(hpriv);
 }
 
 #ifdef CONFIG_PM_SLEEP
@@ -277,8 +318,7 @@ static int ahci_suspend(struct device *dev)
 	if (pdata && pdata->suspend)
 		return pdata->suspend(dev);
 
-	if (!IS_ERR(hpriv->clk))
-		clk_disable_unprepare(hpriv->clk);
+	ahci_disable_clks(hpriv);
 
 	return 0;
 }
@@ -290,13 +330,9 @@ static int ahci_resume(struct device *dev)
 	struct ahci_host_priv *hpriv = host->private_data;
 	int rc;
 
-	if (!IS_ERR(hpriv->clk)) {
-		rc = clk_prepare_enable(hpriv->clk);
-		if (rc) {
-			dev_err(dev, "clock prepare enable failed");
-			return rc;
-		}
-	}
+	rc = ahci_enable_clks(dev, hpriv);
+	if (rc)
+		return rc;
 
 	if (pdata && pdata->resume) {
 		rc = pdata->resume(dev);
@@ -317,8 +353,7 @@ static int ahci_resume(struct device *dev)
 	return 0;
 
 disable_unprepare_clk:
-	if (!IS_ERR(hpriv->clk))
-		clk_disable_unprepare(hpriv->clk);
+	ahci_disable_clks(hpriv);
 
 	return rc;
 }
diff --git a/include/linux/ahci.h b/include/linux/ahci.h
index 3499d44..19970b0 100644
--- a/include/linux/ahci.h
+++ b/include/linux/ahci.h
@@ -23,6 +23,8 @@
 
 #include <linux/clk.h>
 
+#define AHCI_MAX_CLKS		3
+
 struct ata_port;
 
 struct ahci_host_priv {
@@ -37,7 +39,7 @@ struct ahci_host_priv {
 	u32			em_loc; /* enclosure management location */
 	u32			em_buf_sz;	/* EM buffer size in byte */
 	u32			em_msg_type;	/* EM message type */
-	struct clk		*clk;		/* Optional */
+	struct clk		*clks[AHCI_MAX_CLKS]; /* Optional */
 	void			*plat_data;	/* Other platform data */
 	/* Optional ahci_start_engine override */
 	void			(*start_engine)(struct ata_port *ap);
diff --git a/include/linux/ahci_platform.h b/include/linux/ahci_platform.h
index 737fe38..0071d0b 100644
--- a/include/linux/ahci_platform.h
+++ b/include/linux/ahci_platform.h
@@ -31,4 +31,7 @@ struct ahci_platform_data {
 	unsigned int mask_port_map;
 };
 
+int ahci_platform_enable_clks(struct ahci_host_priv *hpriv);
+void ahci_platform_disable_clks(struct ahci_host_priv *hpriv);
+
 #endif /* _AHCI_PLATFORM_H */
-- 
1.8.5.3

[PATCH v5 05/14] ahci-platform: Add support for an optional regulator for sata-target power

[Hans de Goede]

Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
 .../devicetree/bindings/ata/ahci-platform.txt      |  1 +
 drivers/ata/ahci_platform.c                        | 35 ++++++++++++++++++++--
 include/linux/ahci.h                               |  2 ++
 3 files changed, 36 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.txt b/Documentation/devicetree/bindings/ata/ahci-platform.txt
index 3ced07d..1ac807f 100644
--- a/Documentation/devicetree/bindings/ata/ahci-platform.txt
+++ b/Documentation/devicetree/bindings/ata/ahci-platform.txt
@@ -11,6 +11,7 @@ Required properties:
 Optional properties:
 - dma-coherent      : Present if dma operations are coherent
 - clocks            : a list of phandle + clock specifier pairs
+- target-supply     : regulator for SATA target power
 
 Example:
         sata@ffe08000 {
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index aaa0c08..2f319e9 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -167,6 +167,13 @@ static int ahci_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
+	hpriv->target_pwr = devm_regulator_get_optional(dev, "target");
+	if (IS_ERR(hpriv->target_pwr)) {
+		if (PTR_ERR(hpriv->target_pwr) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		hpriv->target_pwr = NULL;
+	}
+
 	max_clk = dev->of_node ? AHCI_MAX_CLKS : 1;
 	for (i = 0; i < max_clk; i++) {
 		if (i == 0)
@@ -183,9 +190,15 @@ static int ahci_probe(struct platform_device *pdev)
 		hpriv->clks[i] = clk;
 	}
 
+	if (hpriv->target_pwr) {
+		rc = regulator_enable(hpriv->target_pwr);
+		if (rc)
+			goto free_clk;
+	}
+
 	rc = ahci_enable_clks(dev, hpriv);
 	if (rc)
-		goto free_clk;
+		goto disable_regulator;
 
 	/*
 	 * Some platforms might need to prepare for mmio region access,
@@ -268,6 +281,9 @@ pdata_exit:
 		pdata->exit(dev);
 disable_unprepare_clk:
 	ahci_disable_clks(hpriv);
+disable_regulator:
+	if (hpriv->target_pwr)
+		regulator_disable(hpriv->target_pwr);
 free_clk:
 	ahci_put_clks(hpriv);
 	return rc;
@@ -284,6 +300,9 @@ static void ahci_host_stop(struct ata_host *host)
 
 	ahci_disable_clks(hpriv);
 	ahci_put_clks(hpriv);
+
+	if (hpriv->target_pwr)
+		regulator_disable(hpriv->target_pwr);
 }
 
 #ifdef CONFIG_PM_SLEEP
@@ -320,6 +339,9 @@ static int ahci_suspend(struct device *dev)
 
 	ahci_disable_clks(hpriv);
 
+	if (hpriv->target_pwr)
+		regulator_disable(hpriv->target_pwr);
+
 	return 0;
 }
 
@@ -330,9 +352,15 @@ static int ahci_resume(struct device *dev)
 	struct ahci_host_priv *hpriv = host->private_data;
 	int rc;
 
+	if (hpriv->target_pwr) {
+		rc = regulator_enable(hpriv->target_pwr);
+		if (rc)
+			return rc;
+	}
+
 	rc = ahci_enable_clks(dev, hpriv);
 	if (rc)
-		return rc;
+		goto disable_regulator;
 
 	if (pdata && pdata->resume) {
 		rc = pdata->resume(dev);
@@ -354,6 +382,9 @@ static int ahci_resume(struct device *dev)
 
 disable_unprepare_clk:
 	ahci_disable_clks(hpriv);
+disable_regulator:
+	if (hpriv->target_pwr)
+		regulator_disable(hpriv->target_pwr);
 
 	return rc;
 }
diff --git a/include/linux/ahci.h b/include/linux/ahci.h
index 19970b0..ac69cdc 100644
--- a/include/linux/ahci.h
+++ b/include/linux/ahci.h
@@ -22,6 +22,7 @@
 #define __LINUX_AHCI_H__
 
 #include <linux/clk.h>
+#include <linux/regulator/consumer.h>
 
 #define AHCI_MAX_CLKS		3
 
@@ -40,6 +41,7 @@ struct ahci_host_priv {
 	u32			em_buf_sz;	/* EM buffer size in byte */
 	u32			em_msg_type;	/* EM message type */
 	struct clk		*clks[AHCI_MAX_CLKS]; /* Optional */
+	struct regulator	*target_pwr;	/* Optional */
 	void			*plat_data;	/* Other platform data */
 	/* Optional ahci_start_engine override */
 	void			(*start_engine)(struct ata_port *ap);
-- 
1.8.5.3

[PATCH v5 06/14] ahci-platform: Add enable_ / disable_resources helper functions

[Hans de Goede]

Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
 drivers/ata/ahci_platform.c   | 83 ++++++++++++++++++++++++-------------------
 include/linux/ahci_platform.h |  2 ++
 2 files changed, 48 insertions(+), 37 deletions(-)

diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 2f319e9..1cce7a2 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -117,6 +117,39 @@ void ahci_platform_disable_clks(struct ahci_host_priv *hpriv)
 EXPORT_SYMBOL_GPL(ahci_platform_disable_clks);
 
 
+int ahci_platform_enable_resources(struct ahci_host_priv *hpriv)
+{
+	int rc;
+
+	if (hpriv->target_pwr) {
+		rc = regulator_enable(hpriv->target_pwr);
+		if (rc)
+			return rc;
+	}
+
+	rc = ahci_platform_enable_clks(hpriv);
+	if (rc)
+		goto disable_regulator;
+
+	return 0;
+
+disable_regulator:
+	if (hpriv->target_pwr)
+		regulator_disable(hpriv->target_pwr);
+	return rc;
+}
+EXPORT_SYMBOL_GPL(ahci_platform_enable_resources);
+
+void ahci_platform_disable_resources(struct ahci_host_priv *hpriv)
+{
+	ahci_platform_disable_clks(hpriv);
+
+	if (hpriv->target_pwr)
+		regulator_disable(hpriv->target_pwr);
+}
+EXPORT_SYMBOL_GPL(ahci_platform_disable_resources);
+
+
 static void ahci_put_clks(struct ahci_host_priv *hpriv)
 {
 	int c;
@@ -190,15 +223,9 @@ static int ahci_probe(struct platform_device *pdev)
 		hpriv->clks[i] = clk;
 	}
 
-	if (hpriv->target_pwr) {
-		rc = regulator_enable(hpriv->target_pwr);
-		if (rc)
-			goto free_clk;
-	}
-
-	rc = ahci_enable_clks(dev, hpriv);
+	rc = ahci_platform_enable_resources(hpriv);
 	if (rc)
-		goto disable_regulator;
+		goto free_clk;
 
 	/*
 	 * Some platforms might need to prepare for mmio region access,
@@ -209,7 +236,7 @@ static int ahci_probe(struct platform_device *pdev)
 	if (pdata && pdata->init) {
 		rc = pdata->init(dev, hpriv);
 		if (rc)
-			goto disable_unprepare_clk;
+			goto disable_resources;
 	}
 
 	ahci_save_initial_config(dev, hpriv,
@@ -279,11 +306,8 @@ static int ahci_probe(struct platform_device *pdev)
 pdata_exit:
 	if (pdata && pdata->exit)
 		pdata->exit(dev);
-disable_unprepare_clk:
-	ahci_disable_clks(hpriv);
-disable_regulator:
-	if (hpriv->target_pwr)
-		regulator_disable(hpriv->target_pwr);
+disable_resources:
+	ahci_platform_disable_resources(hpriv);
 free_clk:
 	ahci_put_clks(hpriv);
 	return rc;
@@ -298,11 +322,8 @@ static void ahci_host_stop(struct ata_host *host)
 	if (pdata && pdata->exit)
 		pdata->exit(dev);
 
-	ahci_disable_clks(hpriv);
+	ahci_platform_disable_resources(hpriv);
 	ahci_put_clks(hpriv);
-
-	if (hpriv->target_pwr)
-		regulator_disable(hpriv->target_pwr);
 }
 
 #ifdef CONFIG_PM_SLEEP
@@ -337,10 +358,7 @@ static int ahci_suspend(struct device *dev)
 	if (pdata && pdata->suspend)
 		return pdata->suspend(dev);
 
-	ahci_disable_clks(hpriv);
-
-	if (hpriv->target_pwr)
-		regulator_disable(hpriv->target_pwr);
+	ahci_platform_disable_resources(hpriv);
 
 	return 0;
 }
@@ -352,26 +370,20 @@ static int ahci_resume(struct device *dev)
 	struct ahci_host_priv *hpriv = host->private_data;
 	int rc;
 
-	if (hpriv->target_pwr) {
-		rc = regulator_enable(hpriv->target_pwr);
-		if (rc)
-			return rc;
-	}
-
-	rc = ahci_enable_clks(dev, hpriv);
+	rc = ahci_platform_enable_resources(hpriv);
 	if (rc)
-		goto disable_regulator;
+		return rc;
 
 	if (pdata && pdata->resume) {
 		rc = pdata->resume(dev);
 		if (rc)
-			goto disable_unprepare_clk;
+			goto disable_resources;
 	}
 
 	if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
 		rc = ahci_reset_controller(host);
 		if (rc)
-			goto disable_unprepare_clk;
+			goto disable_resources;
 
 		ahci_init_controller(host);
 	}
@@ -380,11 +392,8 @@ static int ahci_resume(struct device *dev)
 
 	return 0;
 
-disable_unprepare_clk:
-	ahci_disable_clks(hpriv);
-disable_regulator:
-	if (hpriv->target_pwr)
-		regulator_disable(hpriv->target_pwr);
+disable_resources:
+	ahci_platform_disable_resources(hpriv);
 
 	return rc;
 }
diff --git a/include/linux/ahci_platform.h b/include/linux/ahci_platform.h
index 0071d0b..5e5f85e 100644
--- a/include/linux/ahci_platform.h
+++ b/include/linux/ahci_platform.h
@@ -33,5 +33,7 @@ struct ahci_platform_data {
 
 int ahci_platform_enable_clks(struct ahci_host_priv *hpriv);
 void ahci_platform_disable_clks(struct ahci_host_priv *hpriv);
+int ahci_platform_enable_resources(struct ahci_host_priv *hpriv);
+void ahci_platform_disable_resources(struct ahci_host_priv *hpriv);
 
 #endif /* _AHCI_PLATFORM_H */
-- 
1.8.5.3

[PATCH v5 07/14] ahci-platform: "Library-ise" ahci_probe functionality

[Hans de Goede]

ahci_probe consists of 3 steps:
1) Get resources (get mmio, clks, regulator)
2) Enable resources, handled by ahci_platform_enable_resouces
3) The more or less standard ahci-host controller init sequence

This commit refactors step 1 and 3 into separate functions, so the platform
drivers for AHCI implementations which need a specific order in step 2,
and / or need to do some custom register poking at some time, can re-use
ahci-platform.c code without needing to copy and paste it.

Note that ahci_platform_init_host's prototype takes the 3 non function
members of ahci_platform_data as arguments, the idea is that drivers using
the new exported utility functions will not use ahci_platform_data at all,
and hopefully in the future ahci_platform_data can go away entirely.

Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
 drivers/ata/ahci_platform.c   | 158 ++++++++++++++++++++++++------------------
 include/linux/ahci_platform.h |  14 ++++
 2 files changed, 106 insertions(+), 66 deletions(-)

diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 1cce7a2..b260ebe 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -150,60 +150,31 @@ void ahci_platform_disable_resources(struct ahci_host_priv *hpriv)
 EXPORT_SYMBOL_GPL(ahci_platform_disable_resources);
 
 
-static void ahci_put_clks(struct ahci_host_priv *hpriv)
-{
-	int c;
-
-	for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++)
-		clk_put(hpriv->clks[c]);
-}
-
-static int ahci_probe(struct platform_device *pdev)
+struct ahci_host_priv *ahci_platform_get_resources(
+	struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct ahci_platform_data *pdata = dev_get_platdata(dev);
-	const struct platform_device_id *id = platform_get_device_id(pdev);
-	struct ata_port_info pi = ahci_port_info[id ? id->driver_data : 0];
-	const struct ata_port_info *ppi[] = { &pi, NULL };
 	struct ahci_host_priv *hpriv;
-	struct ata_host *host;
-	struct resource *mem;
 	struct clk *clk;
-	int i, irq, max_clk, n_ports, rc;
-
-	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!mem) {
-		dev_err(dev, "no mmio space\n");
-		return -EINVAL;
-	}
-
-	irq = platform_get_irq(pdev, 0);
-	if (irq <= 0) {
-		dev_err(dev, "no irq\n");
-		return -EINVAL;
-	}
-
-	if (pdata && pdata->ata_port_info)
-		pi = *pdata->ata_port_info;
+	int i, max_clk, rc;
 
 	hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
 	if (!hpriv) {
 		dev_err(dev, "can't alloc ahci_host_priv\n");
-		return -ENOMEM;
+		return ERR_PTR(-ENOMEM);
 	}
 
-	hpriv->flags |= (unsigned long)pi.private_data;
-
-	hpriv->mmio = devm_ioremap(dev, mem->start, resource_size(mem));
+	hpriv->mmio = devm_ioremap_resource(dev,
+			      platform_get_resource(pdev, IORESOURCE_MEM, 0));
 	if (!hpriv->mmio) {
-		dev_err(dev, "can't map %pR\n", mem);
-		return -ENOMEM;
+		dev_err(dev, "no mmio space\n");
+		return ERR_PTR(-EINVAL);
 	}
 
 	hpriv->target_pwr = devm_regulator_get_optional(dev, "target");
 	if (IS_ERR(hpriv->target_pwr)) {
 		if (PTR_ERR(hpriv->target_pwr) == -EPROBE_DEFER)
-			return -EPROBE_DEFER;
+			return ERR_PTR(-EPROBE_DEFER);
 		hpriv->target_pwr = NULL;
 	}
 
@@ -223,27 +194,48 @@ static int ahci_probe(struct platform_device *pdev)
 		hpriv->clks[i] = clk;
 	}
 
-	rc = ahci_platform_enable_resources(hpriv);
-	if (rc)
-		goto free_clk;
+	return hpriv;
 
-	/*
-	 * Some platforms might need to prepare for mmio region access,
-	 * which could be done in the following init call. So, the mmio
-	 * region shouldn't be accessed before init (if provided) has
-	 * returned successfully.
-	 */
-	if (pdata && pdata->init) {
-		rc = pdata->init(dev, hpriv);
-		if (rc)
-			goto disable_resources;
-	}
+free_clk:
+	while (--i >= 0)
+		clk_put(hpriv->clks[i]);
+	return ERR_PTR(rc);
+}
+EXPORT_SYMBOL_GPL(ahci_platform_get_resources);
+
+void ahci_platform_put_resources(struct ahci_host_priv *hpriv)
+{
+	int c;
+
+	for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++)
+		clk_put(hpriv->clks[c]);
+}
+EXPORT_SYMBOL_GPL(ahci_platform_put_resources);
+
+
+int ahci_platform_init_host(struct platform_device *pdev,
+			    struct ahci_host_priv *hpriv,
+			    const struct ata_port_info *pi_template,
+			    unsigned int force_port_map,
+			    unsigned int mask_port_map)
+{
+	struct device *dev = &pdev->dev;
+	struct ata_port_info pi = *pi_template;
+	const struct ata_port_info *ppi[] = { &pi, NULL };
+	struct ata_host *host;
+	int i, irq, n_ports, rc;
 
-	ahci_save_initial_config(dev, hpriv,
-		pdata ? pdata->force_port_map : 0,
-		pdata ? pdata->mask_port_map  : 0);
+	irq = platform_get_irq(pdev, 0);
+	if (irq <= 0) {
+		dev_err(dev, "no irq\n");
+		return -EINVAL;
+	}
 
 	/* prepare host */
+	hpriv->flags |= (unsigned long)pi.private_data;
+
+	ahci_save_initial_config(dev, hpriv, force_port_map, mask_port_map);
+
 	if (hpriv->cap & HOST_CAP_NCQ)
 		pi.flags |= ATA_FLAG_NCQ;
 
@@ -260,10 +252,8 @@ static int ahci_probe(struct platform_device *pdev)
 	n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
 
 	host = ata_host_alloc_pinfo(dev, ppi, n_ports);
-	if (!host) {
-		rc = -ENOMEM;
-		goto pdata_exit;
-	}
+	if (!host)
+		return -ENOMEM;
 
 	host->private_data = hpriv;
 
@@ -278,7 +268,8 @@ static int ahci_probe(struct platform_device *pdev)
 	for (i = 0; i < host->n_ports; i++) {
 		struct ata_port *ap = host->ports[i];
 
-		ata_port_desc(ap, "mmio %pR", mem);
+		ata_port_desc(ap, "mmio %pR",
+			      platform_get_resource(pdev, IORESOURCE_MEM, 0));
 		ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80);
 
 		/* set enclosure management message type */
@@ -292,13 +283,48 @@ static int ahci_probe(struct platform_device *pdev)
 
 	rc = ahci_reset_controller(host);
 	if (rc)
-		goto pdata_exit;
+		return rc;
 
 	ahci_init_controller(host);
 	ahci_print_info(host, "platform");
 
-	rc = ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
-			       &ahci_platform_sht);
+	return ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
+				 &ahci_platform_sht);
+}
+EXPORT_SYMBOL_GPL(ahci_platform_init_host);
+
+static int ahci_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct ahci_platform_data *pdata = dev_get_platdata(dev);
+	const struct platform_device_id *id = platform_get_device_id(pdev);
+	struct ahci_host_priv *hpriv;
+	int rc;
+
+	hpriv = ahci_platform_get_resources(pdev);
+	if (IS_ERR(hpriv))
+		return PTR_ERR(hpriv);
+
+	rc = ahci_platform_enable_resources(hpriv);
+	if (rc)
+		goto put_resources;
+
+	/*
+	 * Some platforms might need to prepare for mmio region access,
+	 * which could be done in the following init call. So, the mmio
+	 * region shouldn't be accessed before init (if provided) has
+	 * returned successfully.
+	 */
+	if (pdata && pdata->init) {
+		rc = pdata->init(dev, hpriv);
+		if (rc)
+			goto disable_resources;
+	}
+
+	rc = ahci_platform_init_host(pdev, hpriv,
+				     &ahci_port_info[id ? id->driver_data : 0],
+				     pdata ? pdata->force_port_map : 0,
+				     pdata ? pdata->mask_port_map  : 0);
 	if (rc)
 		goto pdata_exit;
 
@@ -308,8 +334,8 @@ pdata_exit:
 		pdata->exit(dev);
 disable_resources:
 	ahci_platform_disable_resources(hpriv);
-free_clk:
-	ahci_put_clks(hpriv);
+put_resources:
+	ahci_platform_put_resources(hpriv);
 	return rc;
 }
 
@@ -323,7 +349,7 @@ static void ahci_host_stop(struct ata_host *host)
 		pdata->exit(dev);
 
 	ahci_platform_disable_resources(hpriv);
-	ahci_put_clks(hpriv);
+	ahci_platform_put_resources(hpriv);
 }
 
 #ifdef CONFIG_PM_SLEEP
diff --git a/include/linux/ahci_platform.h b/include/linux/ahci_platform.h
index 5e5f85e..1dc7602 100644
--- a/include/linux/ahci_platform.h
+++ b/include/linux/ahci_platform.h
@@ -20,7 +20,13 @@
 struct device;
 struct ata_port_info;
 struct ahci_host_priv;
+struct platform_device;
 
+/*
+ * Note ahci_platform_data is deprecated. New drivers which need to override
+ * any of these, should instead declare there own platform_driver struct, and
+ * use ahci_platform* functions in their own probe, suspend and resume methods.
+ */
 struct ahci_platform_data {
 	int (*init)(struct device *dev, struct ahci_host_priv *hpriv);
 	void (*exit)(struct device *dev);
@@ -35,5 +41,13 @@ int ahci_platform_enable_clks(struct ahci_host_priv *hpriv);
 void ahci_platform_disable_clks(struct ahci_host_priv *hpriv);
 int ahci_platform_enable_resources(struct ahci_host_priv *hpriv);
 void ahci_platform_disable_resources(struct ahci_host_priv *hpriv);
+struct ahci_host_priv *ahci_platform_get_resources(
+	struct platform_device *pdev);
+void ahci_platform_put_resources(struct ahci_host_priv *hpriv);
+int ahci_platform_init_host(struct platform_device *pdev,
+			    struct ahci_host_priv *hpriv,
+			    const struct ata_port_info *pi_template,
+			    unsigned int force_port_map,
+			    unsigned int mask_port_map);
 
 #endif /* _AHCI_PLATFORM_H */
-- 
1.8.5.3

[PATCH v5 08/14] ahci-platform: "Library-ise" suspend / resume functionality

[Hans de Goede]

Split suspend / resume code into host suspend / resume functionality and
resource enable / disabling phases, and export the new suspend_ / resume_host
functions.

Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
 drivers/ata/ahci_platform.c   | 55 +++++++++++++++++++++++++++++++------------
 include/linux/ahci_platform.h |  7 ++++++
 2 files changed, 47 insertions(+), 15 deletions(-)

diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index b260ebe..ba93930 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -353,14 +353,12 @@ static void ahci_host_stop(struct ata_host *host)
 }
 
 #ifdef CONFIG_PM_SLEEP
-static int ahci_suspend(struct device *dev)
+int ahci_platform_suspend_host(struct device *dev)
 {
-	struct ahci_platform_data *pdata = dev_get_platdata(dev);
 	struct ata_host *host = dev_get_drvdata(dev);
 	struct ahci_host_priv *hpriv = host->private_data;
 	void __iomem *mmio = hpriv->mmio;
 	u32 ctl;
-	int rc;
 
 	if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
 		dev_err(dev, "firmware update required for suspend/resume\n");
@@ -377,7 +375,37 @@ static int ahci_suspend(struct device *dev)
 	writel(ctl, mmio + HOST_CTL);
 	readl(mmio + HOST_CTL); /* flush */
 
-	rc = ata_host_suspend(host, PMSG_SUSPEND);
+	return ata_host_suspend(host, PMSG_SUSPEND);
+}
+EXPORT_SYMBOL_GPL(ahci_platform_suspend_host);
+
+int ahci_platform_resume_host(struct device *dev)
+{
+	struct ata_host *host = dev_get_drvdata(dev);
+	int rc;
+
+	if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
+		rc = ahci_reset_controller(host);
+		if (rc)
+			return rc;
+
+		ahci_init_controller(host);
+	}
+
+	ata_host_resume(host);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ahci_platform_resume_host);
+
+int ahci_platform_suspend(struct device *dev)
+{
+	struct ahci_platform_data *pdata = dev_get_platdata(dev);
+	struct ata_host *host = dev_get_drvdata(dev);
+	struct ahci_host_priv *hpriv = host->private_data;
+	int rc;
+
+	rc = ahci_platform_suspend_host(dev);
 	if (rc)
 		return rc;
 
@@ -388,8 +416,9 @@ static int ahci_suspend(struct device *dev)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(ahci_platform_suspend);
 
-static int ahci_resume(struct device *dev)
+int ahci_platform_resume(struct device *dev)
 {
 	struct ahci_platform_data *pdata = dev_get_platdata(dev);
 	struct ata_host *host = dev_get_drvdata(dev);
@@ -406,15 +435,9 @@ static int ahci_resume(struct device *dev)
 			goto disable_resources;
 	}
 
-	if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
-		rc = ahci_reset_controller(host);
-		if (rc)
-			goto disable_resources;
-
-		ahci_init_controller(host);
-	}
-
-	ata_host_resume(host);
+	rc = ahci_platform_resume_host(dev);
+	if (rc)
+		goto disable_resources;
 
 	return 0;
 
@@ -423,9 +446,11 @@ disable_resources:
 
 	return rc;
 }
+EXPORT_SYMBOL_GPL(ahci_platform_resume);
 #endif
 
-static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_suspend, ahci_resume);
+static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
+			 ahci_platform_resume);
 
 static const struct of_device_id ahci_of_match[] = {
 	{ .compatible = "snps,spear-ahci", },
diff --git a/include/linux/ahci_platform.h b/include/linux/ahci_platform.h
index 1dc7602..b484ac0 100644
--- a/include/linux/ahci_platform.h
+++ b/include/linux/ahci_platform.h
@@ -50,4 +50,11 @@ int ahci_platform_init_host(struct platform_device *pdev,
 			    unsigned int force_port_map,
 			    unsigned int mask_port_map);
 
+#ifdef CONFIG_PM_SLEEP
+int ahci_platform_suspend_host(struct device *dev);
+int ahci_platform_resume_host(struct device *dev);
+int ahci_platform_suspend(struct device *dev);
+int ahci_platform_resume(struct device *dev);
+#endif
+
 #endif /* _AHCI_PLATFORM_H */
-- 
1.8.5.3

[PATCH v5 09/14] ARM: sunxi: Add support for Allwinner SUNXi SoCs sata to ahci_platform

[Hans de Goede]

From: Olliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org>

This patch adds support for the ahci sata controler found on Allwinner A10
and A20 SoCs to the ahci_platform driver.

Orignally written by Olliver Schinagl using the approach of having a platform
device which probe method creates a new child platform device which gets
driven by ahci_platform.c, as done by ahci_imx.c .

Refactored by Hans de Goede to add most of the non sunxi specific functionality
to ahci_platform.c and use a platform_data pointer from of_device_id for the
sunxi specific bits.

Signed-off-by: Olliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org>
Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
 .../devicetree/bindings/ata/ahci-platform.txt      |  18 +-
 drivers/ata/Kconfig                                |   9 +
 drivers/ata/Makefile                               |   1 +
 drivers/ata/ahci_sunxi.c                           | 251 +++++++++++++++++++++
 4 files changed, 276 insertions(+), 3 deletions(-)
 create mode 100644 drivers/ata/ahci_sunxi.c

diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.txt b/Documentation/devicetree/bindings/ata/ahci-platform.txt
index 1ac807f..78b2e80 100644
--- a/Documentation/devicetree/bindings/ata/ahci-platform.txt
+++ b/Documentation/devicetree/bindings/ata/ahci-platform.txt
@@ -4,7 +4,9 @@ SATA nodes are defined to describe on-chip Serial ATA controllers.
 Each SATA controller should have its own node.
 
 Required properties:
-- compatible        : compatible list, contains "snps,spear-ahci"
+- compatible        : compatible list, one of "snps,spear-ahci",
+                      "snps,exynos5440-ahci", "ibm,476gtr-ahci", or
+                      "allwinner,sun4i-a10-ahci"
 - interrupts        : <interrupt mapping for SATA IRQ>
 - reg               : <registers mapping>
 
@@ -13,10 +15,20 @@ Optional properties:
 - clocks            : a list of phandle + clock specifier pairs
 - target-supply     : regulator for SATA target power
 
-Example:
+allwinner,sun4i-a10-ahci required properties:
+- clocks            : index 0 must point to the sata_ref clk, 1 to the ahb clk
+
+Examples:
         sata@ffe08000 {
 		compatible = "snps,spear-ahci";
 		reg = <0xffe08000 0x1000>;
 		interrupts = <115>;
-
         };
+
+	ahci: sata@01c18000 {
+		compatible = "allwinner,sun4i-a10-ahci";
+		reg = <0x01c18000 0x1000>;
+		interrupts = <56>;
+		clocks = <&pll6 0>, <&ahb_gates 25>;
+		target-supply = <&reg_ahci_5v>;
+	};
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 4e73772..cc67cc0 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -106,6 +106,15 @@ config AHCI_IMX
 
 	  If unsure, say N.
 
+config AHCI_SUNXI
+	tristate "Allwinner sunxi AHCI SATA support"
+	depends on ARCH_SUNXI && SATA_AHCI_PLATFORM
+	help
+	  This option enables support for the Allwinner sunxi SoC's
+	  onboard AHCI SATA.
+
+	  If unsure, say N.
+
 config SATA_FSL
 	tristate "Freescale 3.0Gbps SATA support"
 	depends on FSL_SOC
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index 46518c6..246050b 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_SATA_SIL24)	+= sata_sil24.o
 obj-$(CONFIG_SATA_DWC)		+= sata_dwc_460ex.o
 obj-$(CONFIG_SATA_HIGHBANK)	+= sata_highbank.o libahci.o
 obj-$(CONFIG_AHCI_IMX)		+= ahci_imx.o
+obj-$(CONFIG_AHCI_SUNXI)	+= ahci_sunxi.o
 
 # SFF w/ custom DMA
 obj-$(CONFIG_PDC_ADMA)		+= pdc_adma.o
diff --git a/drivers/ata/ahci_sunxi.c b/drivers/ata/ahci_sunxi.c
new file mode 100644
index 0000000..568a211
--- /dev/null
+++ b/drivers/ata/ahci_sunxi.c
@@ -0,0 +1,251 @@
+/*
+ * Allwinner sunxi AHCI SATA platform driver
+ * Copyright 2013 Olliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org>
+ * Copyright 2014 Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
+ *
+ * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
+ * Based on code from Allwinner Technology Co., Ltd. <www.allwinnertech.com>,
+ * Daniel Wang <danielwang-0TFLnhJekD6UEPyfVivIlAC/G2K4zDHf@public.gmane.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/ahci_platform.h>
+#include <linux/clk.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include "ahci.h"
+
+#define AHCI_BISTAFR 0x00a0
+#define AHCI_BISTCR 0x00a4
+#define AHCI_BISTFCTR 0x00a8
+#define AHCI_BISTSR 0x00ac
+#define AHCI_BISTDECR 0x00b0
+#define AHCI_DIAGNR0 0x00b4
+#define AHCI_DIAGNR1 0x00b8
+#define AHCI_OOBR 0x00bc
+#define AHCI_PHYCS0R 0x00c0
+#define AHCI_PHYCS1R 0x00c4
+#define AHCI_PHYCS2R 0x00c8
+#define AHCI_TIMER1MS 0x00e0
+#define AHCI_GPARAM1R 0x00e8
+#define AHCI_GPARAM2R 0x00ec
+#define AHCI_PPARAMR 0x00f0
+#define AHCI_TESTR 0x00f4
+#define AHCI_VERSIONR 0x00f8
+#define AHCI_IDR 0x00fc
+#define AHCI_RWCR 0x00fc
+#define AHCI_P0DMACR 0x0170
+#define AHCI_P0PHYCR 0x0178
+#define AHCI_P0PHYSR 0x017c
+
+static void sunxi_clrbits(void __iomem *reg, u32 clr_val)
+{
+	u32 reg_val;
+
+	reg_val = readl(reg);
+	reg_val &= ~(clr_val);
+	writel(reg_val, reg);
+}
+
+static void sunxi_setbits(void __iomem *reg, u32 set_val)
+{
+	u32 reg_val;
+
+	reg_val = readl(reg);
+	reg_val |= set_val;
+	writel(reg_val, reg);
+}
+
+static void sunxi_clrsetbits(void __iomem *reg, u32 clr_val, u32 set_val)
+{
+	u32 reg_val;
+
+	reg_val = readl(reg);
+	reg_val &= ~(clr_val);
+	reg_val |= set_val;
+	writel(reg_val, reg);
+}
+
+static u32 sunxi_getbits(void __iomem *reg, u8 mask, u8 shift)
+{
+	return (readl(reg) >> shift) & mask;
+}
+
+static int ahci_sunxi_phy_init(struct device *dev, void __iomem *reg_base)
+{
+	u32 reg_val;
+	int timeout;
+
+	/* This magic is from the original code */
+	writel(0, reg_base + AHCI_RWCR);
+	mdelay(5);
+
+	sunxi_setbits(reg_base + AHCI_PHYCS1R, BIT(19));
+	sunxi_clrsetbits(reg_base + AHCI_PHYCS0R,
+			 (0x7 << 24),
+			 (0x5 << 24) | BIT(23) | BIT(18));
+	sunxi_clrsetbits(reg_base + AHCI_PHYCS1R,
+			 (0x3 << 16) | (0x1f << 8) | (0x3 << 6),
+			 (0x2 << 16) | (0x6 << 8) | (0x2 << 6));
+	sunxi_setbits(reg_base + AHCI_PHYCS1R, BIT(28) | BIT(15));
+	sunxi_clrbits(reg_base + AHCI_PHYCS1R, BIT(19));
+	sunxi_clrsetbits(reg_base + AHCI_PHYCS0R,
+			 (0x7 << 20), (0x3 << 20));
+	sunxi_clrsetbits(reg_base + AHCI_PHYCS2R,
+			 (0x1f << 5), (0x19 << 5));
+	mdelay(5);
+
+	sunxi_setbits(reg_base + AHCI_PHYCS0R, (0x1 << 19));
+
+	timeout = 250; /* Power up takes aprox 50 us */
+	do {
+		reg_val = sunxi_getbits(reg_base + AHCI_PHYCS0R, 0x7, 28);
+		if (reg_val == 0x02)
+			break;
+
+		if (--timeout == 0) {
+			dev_err(dev, "PHY power up failed.\n");
+			return -EIO;
+		}
+		udelay(1);
+	} while (1);
+
+	sunxi_setbits(reg_base + AHCI_PHYCS2R, (0x1 << 24));
+
+	timeout = 100; /* Calibration takes aprox 10 us */
+	do {
+		reg_val = sunxi_getbits(reg_base + AHCI_PHYCS2R, 0x1, 24);
+		if (reg_val == 0x00)
+			break;
+
+		if (--timeout == 0) {
+			dev_err(dev, "PHY calibration failed.\n");
+			return -EIO;
+		}
+		udelay(1);
+	} while (1);
+
+	mdelay(15);
+
+	writel(0x7, reg_base + AHCI_RWCR);
+
+	return 0;
+}
+
+static void ahci_sunxi_start_engine(struct ata_port *ap)
+{
+	void __iomem *port_mmio = ahci_port_base(ap);
+	struct ahci_host_priv *hpriv = ap->host->private_data;
+
+	/* Setup DMA before DMA start */
+	sunxi_clrsetbits(hpriv->mmio + AHCI_P0DMACR, 0x0000ff00, 0x00004400);
+
+	/* Start DMA */
+	sunxi_setbits(port_mmio + PORT_CMD, PORT_CMD_START);
+}
+
+static const struct ata_port_info ahci_sunxi_port_info = {
+	AHCI_HFLAGS(AHCI_HFLAG_32BIT_ONLY | AHCI_HFLAG_NO_MSI |
+			  AHCI_HFLAG_NO_PMP | AHCI_HFLAG_YES_NCQ),
+	.flags		= AHCI_FLAG_COMMON | ATA_FLAG_NCQ,
+	.pio_mask	= ATA_PIO4,
+	.udma_mask	= ATA_UDMA6,
+	.port_ops	= &ahci_platform_ops,
+};
+
+static int ahci_sunxi_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct ahci_host_priv *hpriv;
+	int rc;
+
+	hpriv = ahci_platform_get_resources(pdev);
+	if (IS_ERR(hpriv))
+		return PTR_ERR(hpriv);
+
+	hpriv->start_engine = ahci_sunxi_start_engine;
+
+	rc = ahci_platform_enable_resources(hpriv);
+	if (rc)
+		goto put_resources;
+
+	rc = ahci_sunxi_phy_init(dev, hpriv->mmio);
+	if (rc)
+		goto disable_resources;
+
+	rc = ahci_platform_init_host(pdev, hpriv, &ahci_sunxi_port_info, 0, 0);
+	if (rc)
+		goto disable_resources;
+
+	return 0;
+
+disable_resources:
+	ahci_platform_disable_resources(hpriv);
+put_resources:
+	ahci_platform_put_resources(hpriv);
+	return rc;
+}
+
+#ifdef CONFIG_PM_SLEEP
+int ahci_sunxi_resume(struct device *dev)
+{
+	struct ata_host *host = dev_get_drvdata(dev);
+	struct ahci_host_priv *hpriv = host->private_data;
+	int rc;
+
+	rc = ahci_platform_enable_resources(hpriv);
+	if (rc)
+		return rc;
+
+	rc = ahci_sunxi_phy_init(dev, hpriv->mmio);
+	if (rc)
+		goto disable_resources;
+
+	rc = ahci_platform_resume_host(dev);
+	if (rc)
+		goto disable_resources;
+
+	return 0;
+
+disable_resources:
+	ahci_platform_disable_resources(hpriv);
+	return rc;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(ahci_sunxi_pm_ops, ahci_platform_suspend,
+			 ahci_sunxi_resume);
+
+static const struct of_device_id ahci_sunxi_of_match[] = {
+	{ .compatible = "allwinner,sun4i-a10-ahci", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, ahci_sunxi_of_match);
+
+static struct platform_driver ahci_sunxi_driver = {
+	.probe = ahci_sunxi_probe,
+	.remove = ata_platform_remove_one,
+	.driver = {
+		.name = "ahci-sunxi",
+		.owner = THIS_MODULE,
+		.of_match_table = ahci_sunxi_of_match,
+		.pm = &ahci_sunxi_pm_ops,
+	},
+};
+module_platform_driver(ahci_sunxi_driver);
+
+MODULE_DESCRIPTION("Allwinner sunxi AHCI SATA driver");
+MODULE_AUTHOR("Olliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org>");
+MODULE_LICENSE("GPL");
-- 
1.8.5.3

[PATCH v5 10/14] ahci-imx: Port to library-ised ahci_platform

[Hans de Goede]

This avoids the ugliness of creating a nested platform device from probe.

Tested on a wandboard i.mx6 quad.

Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
 .../devicetree/bindings/ata/ahci-platform.txt      |   8 +-
 drivers/ata/ahci_imx.c                             | 218 +++++++++------------
 2 files changed, 101 insertions(+), 125 deletions(-)

diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.txt b/Documentation/devicetree/bindings/ata/ahci-platform.txt
index 78b2e80..5be0f5b 100644
--- a/Documentation/devicetree/bindings/ata/ahci-platform.txt
+++ b/Documentation/devicetree/bindings/ata/ahci-platform.txt
@@ -5,8 +5,8 @@ Each SATA controller should have its own node.
 
 Required properties:
 - compatible        : compatible list, one of "snps,spear-ahci",
-                      "snps,exynos5440-ahci", "ibm,476gtr-ahci", or
-                      "allwinner,sun4i-a10-ahci"
+                      "snps,exynos5440-ahci", "ibm,476gtr-ahci",
+                      "allwinner,sun4i-a10-ahci" or "fsl,imx6q-ahci"
 - interrupts        : <interrupt mapping for SATA IRQ>
 - reg               : <registers mapping>
 
@@ -18,6 +18,10 @@ Optional properties:
 allwinner,sun4i-a10-ahci required properties:
 - clocks            : index 0 must point to the sata_ref clk, 1 to the ahb clk
 
+fsl,imx6q-ahci required properties:
+- clocks            : index 0 must point to the sataf clk, 1 to the sata_ref
+		      clk and 2 to the ahb clk
+
 Examples:
         sata@ffe08000 {
 		compatible = "snps,spear-ahci";
diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c
index 49fa0ca..2210866 100644
--- a/drivers/ata/ahci_imx.c
+++ b/drivers/ata/ahci_imx.c
@@ -34,10 +34,14 @@ enum {
 	HOST_TIMER1MS = 0xe0,			/* Timer 1-ms */
 };
 
+enum {
+	CLK_SATA,
+	CLK_SATA_REF,
+	CLK_AHB
+};
+
 struct imx_ahci_priv {
 	struct platform_device *ahci_pdev;
-	struct clk *sata_ref_clk;
-	struct clk *ahb_clk;
 	struct regmap *gpr;
 	bool no_device;
 	bool first_time;
@@ -47,6 +51,8 @@ static int ahci_imx_hotplug;
 module_param_named(hotplug, ahci_imx_hotplug, int, 0644);
 MODULE_PARM_DESC(hotplug, "AHCI IMX hot-plug support (0=Don't support, 1=support)");
 
+static void ahci_imx_host_stop(struct ata_host *host);
+
 static void ahci_imx_error_handler(struct ata_port *ap)
 {
 	u32 reg_val;
@@ -54,7 +60,7 @@ static void ahci_imx_error_handler(struct ata_port *ap)
 	struct ata_host *host = dev_get_drvdata(ap->dev);
 	struct ahci_host_priv *hpriv = host->private_data;
 	void __iomem *mmio = hpriv->mmio;
-	struct imx_ahci_priv *imxpriv = dev_get_drvdata(ap->dev->parent);
+	struct imx_ahci_priv *imxpriv = hpriv->plat_data;
 
 	ahci_error_handler(ap);
 
@@ -75,12 +81,13 @@ static void ahci_imx_error_handler(struct ata_port *ap)
 	regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
 			IMX6Q_GPR13_SATA_MPLL_CLK_EN,
 			!IMX6Q_GPR13_SATA_MPLL_CLK_EN);
-	clk_disable_unprepare(imxpriv->sata_ref_clk);
+	ahci_platform_disable_clks(hpriv);
 	imxpriv->no_device = true;
 }
 
 static struct ata_port_operations ahci_imx_ops = {
-	.inherits	= &ahci_platform_ops,
+	.inherits	= &ahci_ops,
+	.host_stop	= ahci_imx_host_stop,
 	.error_handler	= ahci_imx_error_handler,
 };
 
@@ -91,25 +98,46 @@ static const struct ata_port_info ahci_imx_port_info = {
 	.port_ops	= &ahci_imx_ops,
 };
 
-static int imx6q_sata_init(struct device *dev, struct ahci_host_priv *hpriv)
+static int imx_ahci_probe(struct platform_device *pdev)
 {
-	int ret = 0;
+	struct device *dev = &pdev->dev;
+	struct ahci_host_priv *hpriv;
+	struct imx_ahci_priv *imxpriv;
 	unsigned int reg_val;
-	struct imx_ahci_priv *imxpriv = dev_get_drvdata(dev->parent);
+	int rc;
+
+	imxpriv = devm_kzalloc(dev, sizeof(*imxpriv), GFP_KERNEL);
+	if (!imxpriv)
+		return -ENOMEM;
+
+	hpriv = ahci_platform_get_resources(pdev);
+	if (IS_ERR(hpriv))
+		return PTR_ERR(hpriv);
+	if (!hpriv->clks[CLK_AHB]) {
+		dev_err(dev, "no ahb clk, need sata, sata_ref and ahb clks\n");
+		rc = -ENOENT;
+		goto put_resources;
+	}
+	hpriv->plat_data = imxpriv;
 
 	imxpriv->gpr =
 		syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
 	if (IS_ERR(imxpriv->gpr)) {
 		dev_err(dev, "failed to find fsl,imx6q-iomux-gpr regmap\n");
-		return PTR_ERR(imxpriv->gpr);
+		rc = PTR_ERR(imxpriv->gpr);
+		goto put_resources;
 	}
 
-	ret = clk_prepare_enable(imxpriv->sata_ref_clk);
-	if (ret < 0) {
-		dev_err(dev, "prepare-enable sata_ref clock err:%d\n", ret);
-		return ret;
+	if (hpriv->target_pwr) {
+		rc = regulator_enable(hpriv->target_pwr);
+		if (rc)
+			goto put_resources;
 	}
 
+	rc = ahci_platform_enable_clks(hpriv);
+	if (rc)
+		goto disable_regulator;
+
 	/*
 	 * set PHY Paremeters, two steps to configure the GPR13,
 	 * one write for rest of parameters, mask of first write
@@ -156,24 +184,53 @@ static int imx6q_sata_init(struct device *dev, struct ahci_host_priv *hpriv)
 		writel(reg_val, hpriv->mmio + HOST_PORTS_IMPL);
 	}
 
-	reg_val = clk_get_rate(imxpriv->ahb_clk) / 1000;
+	reg_val = clk_get_rate(hpriv->clks[CLK_AHB]) / 1000;
 	writel(reg_val, hpriv->mmio + HOST_TIMER1MS);
 
+	rc = ahci_platform_init_host(pdev, hpriv, &ahci_imx_port_info, 0, 0);
+	if (rc)
+		goto disable_clks;
+
 	return 0;
+
+disable_clks:
+	ahci_platform_disable_clks(hpriv);
+disable_regulator:
+	if (hpriv->target_pwr)
+		regulator_disable(hpriv->target_pwr);
+put_resources:
+	ahci_platform_put_resources(hpriv);
+	return rc;
 }
 
-static void imx6q_sata_exit(struct device *dev)
+static void ahci_imx_host_stop(struct ata_host *host)
 {
-	struct imx_ahci_priv *imxpriv =  dev_get_drvdata(dev->parent);
+	struct ahci_host_priv *hpriv = host->private_data;
+	struct imx_ahci_priv *imxpriv = hpriv->plat_data;
 
-	regmap_update_bits(imxpriv->gpr, 0x34, IMX6Q_GPR13_SATA_MPLL_CLK_EN,
+	if (!imxpriv->no_device) {
+		regmap_update_bits(imxpriv->gpr, 0x34,
+			IMX6Q_GPR13_SATA_MPLL_CLK_EN,
 			!IMX6Q_GPR13_SATA_MPLL_CLK_EN);
-	clk_disable_unprepare(imxpriv->sata_ref_clk);
+		ahci_platform_disable_clks(hpriv);
+	}
+
+	if (hpriv->target_pwr)
+		regulator_disable(hpriv->target_pwr);
+
+	ahci_platform_put_resources(hpriv);
 }
 
 static int imx_ahci_suspend(struct device *dev)
 {
-	struct imx_ahci_priv *imxpriv =  dev_get_drvdata(dev->parent);
+	struct ata_host *host = dev_get_drvdata(dev);
+	struct ahci_host_priv *hpriv = host->private_data;
+	struct imx_ahci_priv *imxpriv = hpriv->plat_data;
+	int rc;
+
+	rc = ahci_platform_suspend_host(dev);
+	if (rc)
+		return rc;
 
 	/*
 	 * If no_device is set, The CLKs had been gated off in the
@@ -183,19 +240,30 @@ static int imx_ahci_suspend(struct device *dev)
 		regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
 				IMX6Q_GPR13_SATA_MPLL_CLK_EN,
 				!IMX6Q_GPR13_SATA_MPLL_CLK_EN);
-		clk_disable_unprepare(imxpriv->sata_ref_clk);
+		ahci_platform_disable_clks(hpriv);
 	}
 
+	if (hpriv->target_pwr)
+		regulator_disable(hpriv->target_pwr);
+
 	return 0;
 }
 
 static int imx_ahci_resume(struct device *dev)
 {
-	struct imx_ahci_priv *imxpriv =  dev_get_drvdata(dev->parent);
+	struct ata_host *host = dev_get_drvdata(dev);
+	struct ahci_host_priv *hpriv = host->private_data;
+	struct imx_ahci_priv *imxpriv = hpriv->plat_data;
 	int ret;
 
+	if (hpriv->target_pwr) {
+		ret = regulator_enable(hpriv->target_pwr);
+		if (ret)
+			return ret;
+	}
+
 	if (!imxpriv->no_device) {
-		ret = clk_prepare_enable(imxpriv->sata_ref_clk);
+		ret = ahci_platform_enable_clks(hpriv);
 		if (ret < 0) {
 			dev_err(dev, "pre-enable sata_ref clock err:%d\n", ret);
 			return ret;
@@ -207,123 +275,27 @@ static int imx_ahci_resume(struct device *dev)
 		usleep_range(1000, 2000);
 	}
 
-	return 0;
+	return ahci_platform_resume_host(dev);
 }
 
-static struct ahci_platform_data imx6q_sata_pdata = {
-	.init = imx6q_sata_init,
-	.exit = imx6q_sata_exit,
-	.ata_port_info = &ahci_imx_port_info,
-	.suspend = imx_ahci_suspend,
-	.resume = imx_ahci_resume,
-};
+static SIMPLE_DEV_PM_OPS(ahci_imx_pm_ops, imx_ahci_suspend, imx_ahci_resume);
 
 static const struct of_device_id imx_ahci_of_match[] = {
-	{ .compatible = "fsl,imx6q-ahci", .data = &imx6q_sata_pdata},
+	{ .compatible = "fsl,imx6q-ahci", },
 	{},
 };
 MODULE_DEVICE_TABLE(of, imx_ahci_of_match);
 
-static int imx_ahci_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct resource *mem, *irq, res[2];
-	const struct of_device_id *of_id;
-	const struct ahci_platform_data *pdata = NULL;
-	struct imx_ahci_priv *imxpriv;
-	struct device *ahci_dev;
-	struct platform_device *ahci_pdev;
-	int ret;
-
-	imxpriv = devm_kzalloc(dev, sizeof(*imxpriv), GFP_KERNEL);
-	if (!imxpriv) {
-		dev_err(dev, "can't alloc ahci_host_priv\n");
-		return -ENOMEM;
-	}
-
-	ahci_pdev = platform_device_alloc("ahci", -1);
-	if (!ahci_pdev)
-		return -ENODEV;
-
-	ahci_dev = &ahci_pdev->dev;
-	ahci_dev->parent = dev;
-
-	imxpriv->no_device = false;
-	imxpriv->first_time = true;
-	imxpriv->ahb_clk = devm_clk_get(dev, "ahb");
-	if (IS_ERR(imxpriv->ahb_clk)) {
-		dev_err(dev, "can't get ahb clock.\n");
-		ret = PTR_ERR(imxpriv->ahb_clk);
-		goto err_out;
-	}
-
-	imxpriv->sata_ref_clk = devm_clk_get(dev, "sata_ref");
-	if (IS_ERR(imxpriv->sata_ref_clk)) {
-		dev_err(dev, "can't get sata_ref clock.\n");
-		ret = PTR_ERR(imxpriv->sata_ref_clk);
-		goto err_out;
-	}
-
-	imxpriv->ahci_pdev = ahci_pdev;
-	platform_set_drvdata(pdev, imxpriv);
-
-	of_id = of_match_device(imx_ahci_of_match, dev);
-	if (of_id) {
-		pdata = of_id->data;
-	} else {
-		ret = -EINVAL;
-		goto err_out;
-	}
-
-	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (!mem || !irq) {
-		dev_err(dev, "no mmio/irq resource\n");
-		ret = -ENOMEM;
-		goto err_out;
-	}
-
-	res[0] = *mem;
-	res[1] = *irq;
-
-	ahci_dev->coherent_dma_mask = DMA_BIT_MASK(32);
-	ahci_dev->dma_mask = &ahci_dev->coherent_dma_mask;
-	ahci_dev->of_node = dev->of_node;
-
-	ret = platform_device_add_resources(ahci_pdev, res, 2);
-	if (ret)
-		goto err_out;
-
-	ret = platform_device_add_data(ahci_pdev, pdata, sizeof(*pdata));
-	if (ret)
-		goto err_out;
-
-	ret = platform_device_add(ahci_pdev);
-	if (ret) {
-err_out:
-		platform_device_put(ahci_pdev);
-		return ret;
-	}
-
-	return 0;
-}
 
-static int imx_ahci_remove(struct platform_device *pdev)
-{
-	struct imx_ahci_priv *imxpriv = platform_get_drvdata(pdev);
-	struct platform_device *ahci_pdev = imxpriv->ahci_pdev;
-
-	platform_device_unregister(ahci_pdev);
-	return 0;
-}
 
 static struct platform_driver imx_ahci_driver = {
 	.probe = imx_ahci_probe,
-	.remove = imx_ahci_remove,
+	.remove = ata_platform_remove_one,
 	.driver = {
 		.name = "ahci-imx",
 		.owner = THIS_MODULE,
 		.of_match_table = imx_ahci_of_match,
+		.pm = &ahci_imx_pm_ops,
 	},
 };
 module_platform_driver(imx_ahci_driver);
-- 
1.8.5.3

[PATCH v5 11/14] ahci-imx: Add imx_ahci_phy_init / _exit helpers

[Hans de Goede]

Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
 drivers/ata/ahci_imx.c | 142 +++++++++++++++++++++++++++----------------------
 1 file changed, 77 insertions(+), 65 deletions(-)

diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c
index 2210866..e58e062 100644
--- a/drivers/ata/ahci_imx.c
+++ b/drivers/ata/ahci_imx.c
@@ -51,6 +51,7 @@ static int ahci_imx_hotplug;
 module_param_named(hotplug, ahci_imx_hotplug, int, 0644);
 MODULE_PARM_DESC(hotplug, "AHCI IMX hot-plug support (0=Don't support, 1=support)");
 
+static void imx_ahci_phy_exit(struct ahci_host_priv *hpriv);
 static void ahci_imx_host_stop(struct ata_host *host);
 
 static void ahci_imx_error_handler(struct ata_port *ap)
@@ -78,10 +79,8 @@ static void ahci_imx_error_handler(struct ata_port *ap)
 	 */
 	reg_val = readl(mmio + PORT_PHY_CTL);
 	writel(reg_val | PORT_PHY_CTL_PDDQ_LOC, mmio + PORT_PHY_CTL);
-	regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
-			IMX6Q_GPR13_SATA_MPLL_CLK_EN,
-			!IMX6Q_GPR13_SATA_MPLL_CLK_EN);
-	ahci_platform_disable_clks(hpriv);
+
+	imx_ahci_phy_exit(hpriv);
 	imxpriv->no_device = true;
 }
 
@@ -98,40 +97,18 @@ static const struct ata_port_info ahci_imx_port_info = {
 	.port_ops	= &ahci_imx_ops,
 };
 
-static int imx_ahci_probe(struct platform_device *pdev)
+static int imx_ahci_phy_init(struct ahci_host_priv *hpriv)
 {
-	struct device *dev = &pdev->dev;
-	struct ahci_host_priv *hpriv;
-	struct imx_ahci_priv *imxpriv;
-	unsigned int reg_val;
+	struct imx_ahci_priv *imxpriv = hpriv->plat_data;
 	int rc;
 
-	imxpriv = devm_kzalloc(dev, sizeof(*imxpriv), GFP_KERNEL);
-	if (!imxpriv)
-		return -ENOMEM;
-
-	hpriv = ahci_platform_get_resources(pdev);
-	if (IS_ERR(hpriv))
-		return PTR_ERR(hpriv);
-	if (!hpriv->clks[CLK_AHB]) {
-		dev_err(dev, "no ahb clk, need sata, sata_ref and ahb clks\n");
-		rc = -ENOENT;
-		goto put_resources;
-	}
-	hpriv->plat_data = imxpriv;
-
-	imxpriv->gpr =
-		syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
-	if (IS_ERR(imxpriv->gpr)) {
-		dev_err(dev, "failed to find fsl,imx6q-iomux-gpr regmap\n");
-		rc = PTR_ERR(imxpriv->gpr);
-		goto put_resources;
-	}
+	if (imxpriv->no_device)
+		return 0;
 
 	if (hpriv->target_pwr) {
 		rc = regulator_enable(hpriv->target_pwr);
 		if (rc)
-			goto put_resources;
+			return rc;
 	}
 
 	rc = ahci_platform_enable_clks(hpriv);
@@ -144,7 +121,8 @@ static int imx_ahci_probe(struct platform_device *pdev)
 	 * is 0x07ffffff, and the other one write for setting
 	 * the mpll_clk_en.
 	 */
-	regmap_update_bits(imxpriv->gpr, 0x34, IMX6Q_GPR13_SATA_RX_EQ_VAL_MASK
+	regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13
+			, IMX6Q_GPR13_SATA_RX_EQ_VAL_MASK
 			| IMX6Q_GPR13_SATA_RX_LOS_LVL_MASK
 			| IMX6Q_GPR13_SATA_RX_DPLL_MODE_MASK
 			| IMX6Q_GPR13_SATA_SPD_MODE_MASK
@@ -162,9 +140,69 @@ static int imx_ahci_probe(struct platform_device *pdev)
 			| IMX6Q_GPR13_SATA_TX_ATTEN_9_16
 			| IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB
 			| IMX6Q_GPR13_SATA_TX_LVL_1_025_V);
-	regmap_update_bits(imxpriv->gpr, 0x34, IMX6Q_GPR13_SATA_MPLL_CLK_EN,
+
+	regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
+			IMX6Q_GPR13_SATA_MPLL_CLK_EN,
 			IMX6Q_GPR13_SATA_MPLL_CLK_EN);
-	usleep_range(100, 200);
+
+	usleep_range(1000, 2000);
+	return 0;
+
+disable_regulator:
+	if (hpriv->target_pwr)
+		regulator_disable(hpriv->target_pwr);
+	return rc;
+}
+
+static void imx_ahci_phy_exit(struct ahci_host_priv *hpriv)
+{
+	struct imx_ahci_priv *imxpriv = hpriv->plat_data;
+
+	if (imxpriv->no_device)
+		return;
+
+	regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
+			IMX6Q_GPR13_SATA_MPLL_CLK_EN,
+			!IMX6Q_GPR13_SATA_MPLL_CLK_EN);
+	ahci_platform_disable_clks(hpriv);
+
+	if (hpriv->target_pwr)
+		regulator_disable(hpriv->target_pwr);
+}
+
+static int imx_ahci_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct ahci_host_priv *hpriv;
+	struct imx_ahci_priv *imxpriv;
+	unsigned int reg_val;
+	int rc;
+
+	imxpriv = devm_kzalloc(dev, sizeof(*imxpriv), GFP_KERNEL);
+	if (!imxpriv)
+		return -ENOMEM;
+
+	hpriv = ahci_platform_get_resources(pdev);
+	if (IS_ERR(hpriv))
+		return PTR_ERR(hpriv);
+	if (!hpriv->clks[CLK_AHB]) {
+		dev_err(dev, "no ahb clk, need sata, sata_ref and ahb clks\n");
+		rc = -ENOENT;
+		goto put_resources;
+	}
+	hpriv->plat_data = imxpriv;
+
+	imxpriv->gpr =
+		syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
+	if (IS_ERR(imxpriv->gpr)) {
+		dev_err(dev, "failed to find fsl,imx6q-iomux-gpr regmap\n");
+		rc = PTR_ERR(imxpriv->gpr);
+		goto put_resources;
+	}
+
+	rc = imx_ahci_phy_init(hpriv);
+	if (rc)
+		goto put_resources;
 
 	/*
 	 * Configure the HWINIT bits of the HOST_CAP and HOST_PORTS_IMPL,
@@ -189,15 +227,12 @@ static int imx_ahci_probe(struct platform_device *pdev)
 
 	rc = ahci_platform_init_host(pdev, hpriv, &ahci_imx_port_info, 0, 0);
 	if (rc)
-		goto disable_clks;
+		goto phy_exit;
 
 	return 0;
 
-disable_clks:
-	ahci_platform_disable_clks(hpriv);
-disable_regulator:
-	if (hpriv->target_pwr)
-		regulator_disable(hpriv->target_pwr);
+phy_exit:
+	imx_ahci_phy_exit(hpriv);
 put_resources:
 	ahci_platform_put_resources(hpriv);
 	return rc;
@@ -206,18 +241,8 @@ put_resources:
 static void ahci_imx_host_stop(struct ata_host *host)
 {
 	struct ahci_host_priv *hpriv = host->private_data;
-	struct imx_ahci_priv *imxpriv = hpriv->plat_data;
-
-	if (!imxpriv->no_device) {
-		regmap_update_bits(imxpriv->gpr, 0x34,
-			IMX6Q_GPR13_SATA_MPLL_CLK_EN,
-			!IMX6Q_GPR13_SATA_MPLL_CLK_EN);
-		ahci_platform_disable_clks(hpriv);
-	}
-
-	if (hpriv->target_pwr)
-		regulator_disable(hpriv->target_pwr);
 
+	imx_ahci_phy_exit(hpriv);
 	ahci_platform_put_resources(hpriv);
 }
 
@@ -225,26 +250,13 @@ static int imx_ahci_suspend(struct device *dev)
 {
 	struct ata_host *host = dev_get_drvdata(dev);
 	struct ahci_host_priv *hpriv = host->private_data;
-	struct imx_ahci_priv *imxpriv = hpriv->plat_data;
 	int rc;
 
 	rc = ahci_platform_suspend_host(dev);
 	if (rc)
 		return rc;
 
-	/*
-	 * If no_device is set, The CLKs had been gated off in the
-	 * initialization so don't do it again here.
-	 */
-	if (!imxpriv->no_device) {
-		regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
-				IMX6Q_GPR13_SATA_MPLL_CLK_EN,
-				!IMX6Q_GPR13_SATA_MPLL_CLK_EN);
-		ahci_platform_disable_clks(hpriv);
-	}
-
-	if (hpriv->target_pwr)
-		regulator_disable(hpriv->target_pwr);
+	imx_ahci_phy_exit(hpriv);
 
 	return 0;
 }
-- 
1.8.5.3

[PATCH v5 12/14] ahci-imx: Fix link not coming back up after suspend / resume

[Hans de Goede]

The phy needs to be re-initialized on resume for the link to properly come
back up.

Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
 drivers/ata/ahci_imx.c | 22 +++-------------------
 1 file changed, 3 insertions(+), 19 deletions(-)

diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c
index e58e062..68d89fa 100644
--- a/drivers/ata/ahci_imx.c
+++ b/drivers/ata/ahci_imx.c
@@ -265,27 +265,11 @@ static int imx_ahci_resume(struct device *dev)
 {
 	struct ata_host *host = dev_get_drvdata(dev);
 	struct ahci_host_priv *hpriv = host->private_data;
-	struct imx_ahci_priv *imxpriv = hpriv->plat_data;
 	int ret;
 
-	if (hpriv->target_pwr) {
-		ret = regulator_enable(hpriv->target_pwr);
-		if (ret)
-			return ret;
-	}
-
-	if (!imxpriv->no_device) {
-		ret = ahci_platform_enable_clks(hpriv);
-		if (ret < 0) {
-			dev_err(dev, "pre-enable sata_ref clock err:%d\n", ret);
-			return ret;
-		}
-
-		regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
-				IMX6Q_GPR13_SATA_MPLL_CLK_EN,
-				IMX6Q_GPR13_SATA_MPLL_CLK_EN);
-		usleep_range(1000, 2000);
-	}
+	ret = imx_ahci_phy_init(hpriv);
+	if (ret)
+		return ret;
 
 	return ahci_platform_resume_host(dev);
 }
-- 
1.8.5.3

[PATCH v5 13/14] ARM: sun4i: dts: Add ahci / sata support

[Hans de Goede]

From: Oliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org>

This patch adds sunxi sata support to A10 boards that have such a connector.
Some boards also feature a regulator via a GPIO and support for this is also
added.

Signed-off-by: Olliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org>
Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
 arch/arm/boot/dts/sun4i-a10-a1000.dts      |  4 ++++
 arch/arm/boot/dts/sun4i-a10-cubieboard.dts |  6 +++++
 arch/arm/boot/dts/sun4i-a10.dtsi           |  8 +++++++
 arch/arm/boot/dts/sunxi-ahci-reg.dtsi      | 38 ++++++++++++++++++++++++++++++
 4 files changed, 56 insertions(+)
 create mode 100644 arch/arm/boot/dts/sunxi-ahci-reg.dtsi

diff --git a/arch/arm/boot/dts/sun4i-a10-a1000.dts b/arch/arm/boot/dts/sun4i-a10-a1000.dts
index aef8207..3fb7305 100644
--- a/arch/arm/boot/dts/sun4i-a10-a1000.dts
+++ b/arch/arm/boot/dts/sun4i-a10-a1000.dts
@@ -48,6 +48,10 @@
 			status = "okay";
 		};
 
+		ahci: sata@01c18000 {
+			status = "okay";
+		};
+
 		pinctrl@01c20800 {
 			mmc0_cd_pin_a1000: mmc0_cd_pin@0 {
 				allwinner,pins = "PH1";
diff --git a/arch/arm/boot/dts/sun4i-a10-cubieboard.dts b/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
index f50fb2b..6ae1110 100644
--- a/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
+++ b/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
@@ -12,6 +12,7 @@
 
 /dts-v1/;
 /include/ "sun4i-a10.dtsi"
+/include/ "sunxi-ahci-reg.dtsi"
 
 / {
 	model = "Cubietech Cubieboard";
@@ -51,6 +52,11 @@
 			status = "okay";
 		};
 
+		ahci: sata@01c18000 {
+			target-supply = <&reg_ahci_5v>;
+			status = "okay";
+		};
+
 		pinctrl@01c20800 {
 			mmc0_cd_pin_cubieboard: mmc0_cd_pin@0 {
 				allwinner,pins = "PH1";
diff --git a/arch/arm/boot/dts/sun4i-a10.dtsi b/arch/arm/boot/dts/sun4i-a10.dtsi
index 4736dd2..198dcda 100644
--- a/arch/arm/boot/dts/sun4i-a10.dtsi
+++ b/arch/arm/boot/dts/sun4i-a10.dtsi
@@ -331,6 +331,14 @@
 			status = "disabled";
 		};
 
+		ahci: sata@01c18000 {
+			compatible = "allwinner,sun4i-a10-ahci";
+			reg = <0x01c18000 0x1000>;
+			interrupts = <56>;
+			clocks = <&pll6 0>, <&ahb_gates 25>;
+			status = "disabled";
+		};
+
 		intc: interrupt-controller@01c20400 {
 			compatible = "allwinner,sun4i-ic";
 			reg = <0x01c20400 0x400>;
diff --git a/arch/arm/boot/dts/sunxi-ahci-reg.dtsi b/arch/arm/boot/dts/sunxi-ahci-reg.dtsi
new file mode 100644
index 0000000..955b197
--- /dev/null
+++ b/arch/arm/boot/dts/sunxi-ahci-reg.dtsi
@@ -0,0 +1,38 @@
+/*
+ * sunxi boards sata target power supply common code
+ *
+ * Copyright 2014 - Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+/ {
+	soc@01c00000 {
+		ahci_pwr_pin_a: ahci_pwr_pin@0 {
+			allwinner,pins = "PB8";
+			allwinner,function = "gpio_out";
+			allwinner,drive = <0>;
+			allwinner,pull = <0>;
+		};
+	};
+
+	regulators {
+		compatible = "simple-bus";
+		pinctrl-names = "default";
+
+		reg_ahci_5v: ahci-5v {
+			compatible = "regulator-fixed";
+			regulator-name = "ahci-5v";
+			regulator-min-microvolt = <5000000>;
+			regulator-max-microvolt = <5000000>;
+			pinctrl-0 = <&ahci_pwr_pin_a>;
+			gpio = <&pio 1 8 0>;
+			enable-active-high;
+		};
+	};
+};
-- 
1.8.5.3

[PATCH v5 14/14] ARM: sun7i: dts: Add ahci / sata support

[Hans de Goede]

This patch adds sunxi sata support to A20 boards that have such a connector.
Some boards also feature a regulator via a GPIO and support for this is also
added.

Signed-off-by: Olliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org>
Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
 arch/arm/boot/dts/sun7i-a20-cubieboard2.dts     |  6 ++++++
 arch/arm/boot/dts/sun7i-a20-cubietruck.dts      | 20 ++++++++++++++++++++
 arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts |  6 ++++++
 arch/arm/boot/dts/sun7i-a20.dtsi                |  8 ++++++++
 4 files changed, 40 insertions(+)

diff --git a/arch/arm/boot/dts/sun7i-a20-cubieboard2.dts b/arch/arm/boot/dts/sun7i-a20-cubieboard2.dts
index 48777cd..1cab521 100644
--- a/arch/arm/boot/dts/sun7i-a20-cubieboard2.dts
+++ b/arch/arm/boot/dts/sun7i-a20-cubieboard2.dts
@@ -13,6 +13,7 @@
 
 /dts-v1/;
 /include/ "sun7i-a20.dtsi"
+/include/ "sunxi-ahci-reg.dtsi"
 
 / {
 	model = "Cubietech Cubieboard2";
@@ -28,6 +29,11 @@
 			status = "okay";
 		};
 
+		ahci: sata@01c18000 {
+			target-supply = <&reg_ahci_5v>;
+			status = "okay";
+		};
+
 		pinctrl@01c20800 {
 			mmc0_cd_pin_cubieboard2: mmc0_cd_pin@0 {
 				allwinner,pins = "PH1";
diff --git a/arch/arm/boot/dts/sun7i-a20-cubietruck.dts b/arch/arm/boot/dts/sun7i-a20-cubietruck.dts
index 2684f27..1247ea1 100644
--- a/arch/arm/boot/dts/sun7i-a20-cubietruck.dts
+++ b/arch/arm/boot/dts/sun7i-a20-cubietruck.dts
@@ -13,6 +13,7 @@
 
 /dts-v1/;
 /include/ "sun7i-a20.dtsi"
+/include/ "sunxi-ahci-reg.dtsi"
 
 / {
 	model = "Cubietech Cubietruck";
@@ -28,6 +29,11 @@
 			status = "okay";
 		};
 
+		ahci: sata@01c18000 {
+			target-supply = <&reg_ahci_5v>;
+			status = "okay";
+		};
+
 		pinctrl@01c20800 {
 			mmc0_cd_pin_cubietruck: mmc0_cd_pin@0 {
 				allwinner,pins = "PH1";
@@ -36,6 +42,13 @@
 				allwinner,pull = <0>;
 			};
 
+			ahci_pwr_pin_cubietruck: ahci_pwr_pin@1 {
+				allwinner,pins = "PH12";
+				allwinner,function = "gpio_out";
+				allwinner,drive = <0>;
+				allwinner,pull = <0>;
+			};
+
 			led_pins_cubietruck: led_pins@0 {
 				allwinner,pins = "PH7", "PH11", "PH20", "PH21";
 				allwinner,function = "gpio_out";
@@ -84,4 +97,11 @@
 			gpios = <&pio 7 7 0>;
 		};
 	};
+
+	regulators {
+		reg_ahci_5v: ahci-5v {
+			pinctrl-0 = <&ahci_pwr_pin_cubietruck>;
+			gpio = <&pio 7 12 0>;
+		};
+	};
 };
diff --git a/arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts b/arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts
index bf6f6c8..f135886 100644
--- a/arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts
+++ b/arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts
@@ -13,6 +13,7 @@
 
 /dts-v1/;
 /include/ "sun7i-a20.dtsi"
+/include/ "sunxi-ahci-reg.dtsi"
 
 / {
 	model = "Olimex A20-Olinuxino Micro";
@@ -37,6 +38,11 @@
 			status = "okay";
 		};
 
+		ahci: sata@01c18000 {
+			target-supply = <&reg_ahci_5v>;
+			status = "okay";
+		};
+
 		pinctrl@01c20800 {
 			mmc0_cd_pin_olinuxinom: mmc0_cd_pin@0 {
 				allwinner,pins = "PH1";
diff --git a/arch/arm/boot/dts/sun7i-a20.dtsi b/arch/arm/boot/dts/sun7i-a20.dtsi
index c9c123a..0657bad 100644
--- a/arch/arm/boot/dts/sun7i-a20.dtsi
+++ b/arch/arm/boot/dts/sun7i-a20.dtsi
@@ -347,6 +347,14 @@
 			status = "disabled";
 		};
 
+		ahci: sata@01c18000 {
+			compatible = "allwinner,sun4i-a10-ahci";
+			reg = <0x01c18000 0x1000>;
+			interrupts = <0 56 1>;
+			clocks = <&pll6 0>, <&ahb_gates 25>;
+			status = "disabled";
+		};
+
 		pio: pinctrl@01c20800 {
 			compatible = "allwinner,sun7i-a20-pinctrl";
 			reg = <0x01c20800 0x400>;
-- 
1.8.5.3

Re: [PATCH v5 13/14] ARM: sun4i: dts: Add ahci / sata support

[Chen-Yu Tsai]

Hi,

On Thu, Jan 23, 2014 at 3:04 AM, Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> wrote:
> From: Oliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org>
>
> This patch adds sunxi sata support to A10 boards that have such a connector.
> Some boards also feature a regulator via a GPIO and support for this is also
> added.
>
> Signed-off-by: Olliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org>
> Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> ---
>  arch/arm/boot/dts/sun4i-a10-a1000.dts      |  4 ++++
>  arch/arm/boot/dts/sun4i-a10-cubieboard.dts |  6 +++++
>  arch/arm/boot/dts/sun4i-a10.dtsi           |  8 +++++++
>  arch/arm/boot/dts/sunxi-ahci-reg.dtsi      | 38 ++++++++++++++++++++++++++++++
>  4 files changed, 56 insertions(+)
>  create mode 100644 arch/arm/boot/dts/sunxi-ahci-reg.dtsi
>
> diff --git a/arch/arm/boot/dts/sun4i-a10-a1000.dts b/arch/arm/boot/dts/sun4i-a10-a1000.dts
> index aef8207..3fb7305 100644
> --- a/arch/arm/boot/dts/sun4i-a10-a1000.dts
> +++ b/arch/arm/boot/dts/sun4i-a10-a1000.dts
> @@ -48,6 +48,10 @@
>                         status = "okay";
>                 };
>
> +               ahci: sata@01c18000 {
> +                       status = "okay";
> +               };
> +
>                 pinctrl@01c20800 {
>                         mmc0_cd_pin_a1000: mmc0_cd_pin@0 {
>                                 allwinner,pins = "PH1";
> diff --git a/arch/arm/boot/dts/sun4i-a10-cubieboard.dts b/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
> index f50fb2b..6ae1110 100644
> --- a/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
> +++ b/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
> @@ -12,6 +12,7 @@
>
>  /dts-v1/;
>  /include/ "sun4i-a10.dtsi"
> +/include/ "sunxi-ahci-reg.dtsi"
>
>  / {
>         model = "Cubietech Cubieboard";
> @@ -51,6 +52,11 @@
>                         status = "okay";
>                 };
>
> +               ahci: sata@01c18000 {
> +                       target-supply = <&reg_ahci_5v>;
> +                       status = "okay";
> +               };
> +
>                 pinctrl@01c20800 {
>                         mmc0_cd_pin_cubieboard: mmc0_cd_pin@0 {
>                                 allwinner,pins = "PH1";
> diff --git a/arch/arm/boot/dts/sun4i-a10.dtsi b/arch/arm/boot/dts/sun4i-a10.dtsi
> index 4736dd2..198dcda 100644
> --- a/arch/arm/boot/dts/sun4i-a10.dtsi
> +++ b/arch/arm/boot/dts/sun4i-a10.dtsi
> @@ -331,6 +331,14 @@
>                         status = "disabled";
>                 };
>
> +               ahci: sata@01c18000 {
> +                       compatible = "allwinner,sun4i-a10-ahci";
> +                       reg = <0x01c18000 0x1000>;
> +                       interrupts = <56>;
> +                       clocks = <&pll6 0>, <&ahb_gates 25>;
> +                       status = "disabled";
> +               };
> +

Consider adding

    pinctrl-names = "default";

in the ahci node to suppress "default pin state not found" warnings.
Same goes for sun7i-a20.dtsi.

>                 intc: interrupt-controller@01c20400 {
>                         compatible = "allwinner,sun4i-ic";
>                         reg = <0x01c20400 0x400>;
> diff --git a/arch/arm/boot/dts/sunxi-ahci-reg.dtsi b/arch/arm/boot/dts/sunxi-ahci-reg.dtsi
> new file mode 100644
> index 0000000..955b197
> --- /dev/null
> +++ b/arch/arm/boot/dts/sunxi-ahci-reg.dtsi
> @@ -0,0 +1,38 @@
> +/*
> + * sunxi boards sata target power supply common code
> + *
> + * Copyright 2014 - Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> + *
> + * The code contained herein is licensed under the GNU General Public
> + * License. You may obtain a copy of the GNU General Public License
> + * Version 2 or later at the following locations:
> + *
> + * http://www.opensource.org/licenses/gpl-license.html
> + * http://www.gnu.org/copyleft/gpl.html
> + */
> +
> +/ {
> +       soc@01c00000 {

This block needs to be under

    pinctrl@01c20800 {

> +               ahci_pwr_pin_a: ahci_pwr_pin@0 {
> +                       allwinner,pins = "PB8";
> +                       allwinner,function = "gpio_out";
> +                       allwinner,drive = <0>;
> +                       allwinner,pull = <0>;
> +               };

    };

> +       };
> +
> +       regulators {
> +               compatible = "simple-bus";
> +               pinctrl-names = "default";
> +
> +               reg_ahci_5v: ahci-5v {
> +                       compatible = "regulator-fixed";
> +                       regulator-name = "ahci-5v";
> +                       regulator-min-microvolt = <5000000>;
> +                       regulator-max-microvolt = <5000000>;
> +                       pinctrl-0 = <&ahci_pwr_pin_a>;
> +                       gpio = <&pio 1 8 0>;
> +                       enable-active-high;
> +               };
> +       };
> +};
> --
> 1.8.5.3
>

Great work! Thanks!

ChenYu

Re: [PATCH v5 13/14] ARM: sun4i: dts: Add ahci / sata support

[Hans de Goede]

Hi,

On 01/23/2014 09:34 AM, Chen-Yu Tsai wrote:
> Hi,
>
> On Thu, Jan 23, 2014 at 3:04 AM, Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> wrote:
>> From: Oliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org>
>>
>> This patch adds sunxi sata support to A10 boards that have such a connector.
>> Some boards also feature a regulator via a GPIO and support for this is also
>> added.
>>
>> Signed-off-by: Olliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org>
>> Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
>> ---
>>   arch/arm/boot/dts/sun4i-a10-a1000.dts      |  4 ++++
>>   arch/arm/boot/dts/sun4i-a10-cubieboard.dts |  6 +++++
>>   arch/arm/boot/dts/sun4i-a10.dtsi           |  8 +++++++
>>   arch/arm/boot/dts/sunxi-ahci-reg.dtsi      | 38 ++++++++++++++++++++++++++++++
>>   4 files changed, 56 insertions(+)
>>   create mode 100644 arch/arm/boot/dts/sunxi-ahci-reg.dtsi
>>
>> diff --git a/arch/arm/boot/dts/sun4i-a10-a1000.dts b/arch/arm/boot/dts/sun4i-a10-a1000.dts
>> index aef8207..3fb7305 100644
>> --- a/arch/arm/boot/dts/sun4i-a10-a1000.dts
>> +++ b/arch/arm/boot/dts/sun4i-a10-a1000.dts
>> @@ -48,6 +48,10 @@
>>                          status = "okay";
>>                  };
>>
>> +               ahci: sata@01c18000 {
>> +                       status = "okay";
>> +               };
>> +
>>                  pinctrl@01c20800 {
>>                          mmc0_cd_pin_a1000: mmc0_cd_pin@0 {
>>                                  allwinner,pins = "PH1";
>> diff --git a/arch/arm/boot/dts/sun4i-a10-cubieboard.dts b/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
>> index f50fb2b..6ae1110 100644
>> --- a/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
>> +++ b/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
>> @@ -12,6 +12,7 @@
>>
>>   /dts-v1/;
>>   /include/ "sun4i-a10.dtsi"
>> +/include/ "sunxi-ahci-reg.dtsi"
>>
>>   / {
>>          model = "Cubietech Cubieboard";
>> @@ -51,6 +52,11 @@
>>                          status = "okay";
>>                  };
>>
>> +               ahci: sata@01c18000 {
>> +                       target-supply = <&reg_ahci_5v>;
>> +                       status = "okay";
>> +               };
>> +
>>                  pinctrl@01c20800 {
>>                          mmc0_cd_pin_cubieboard: mmc0_cd_pin@0 {
>>                                  allwinner,pins = "PH1";
>> diff --git a/arch/arm/boot/dts/sun4i-a10.dtsi b/arch/arm/boot/dts/sun4i-a10.dtsi
>> index 4736dd2..198dcda 100644
>> --- a/arch/arm/boot/dts/sun4i-a10.dtsi
>> +++ b/arch/arm/boot/dts/sun4i-a10.dtsi
>> @@ -331,6 +331,14 @@
>>                          status = "disabled";
>>                  };
>>
>> +               ahci: sata@01c18000 {
>> +                       compatible = "allwinner,sun4i-a10-ahci";
>> +                       reg = <0x01c18000 0x1000>;
>> +                       interrupts = <56>;
>> +                       clocks = <&pll6 0>, <&ahb_gates 25>;
>> +                       status = "disabled";
>> +               };
>> +
>
> Consider adding
>
>      pinctrl-names = "default";
>
> in the ahci node to suppress "default pin state not found" warnings.
> Same goes for sun7i-a20.dtsi.

ahci does not use pinctrl, the ahci (and usb) phys have dedicated pins,
since they don't use pinctrl at all no such warnings are issued.

>
>>                  intc: interrupt-controller@01c20400 {
>>                          compatible = "allwinner,sun4i-ic";
>>                          reg = <0x01c20400 0x400>;
>> diff --git a/arch/arm/boot/dts/sunxi-ahci-reg.dtsi b/arch/arm/boot/dts/sunxi-ahci-reg.dtsi
>> new file mode 100644
>> index 0000000..955b197
>> --- /dev/null
>> +++ b/arch/arm/boot/dts/sunxi-ahci-reg.dtsi
>> @@ -0,0 +1,38 @@
>> +/*
>> + * sunxi boards sata target power supply common code
>> + *
>> + * Copyright 2014 - Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
>> + *
>> + * The code contained herein is licensed under the GNU General Public
>> + * License. You may obtain a copy of the GNU General Public License
>> + * Version 2 or later at the following locations:
>> + *
>> + * http://www.opensource.org/licenses/gpl-license.html
>> + * http://www.gnu.org/copyleft/gpl.html
>> + */
>> +
>> +/ {
>> +       soc@01c00000 {
>
> This block needs to be under
>
>      pinctrl@01c20800 {
>
>> +               ahci_pwr_pin_a: ahci_pwr_pin@0 {
>> +                       allwinner,pins = "PB8";
>> +                       allwinner,function = "gpio_out";
>> +                       allwinner,drive = <0>;
>> +                       allwinner,pull = <0>;
>> +               };
>
>      };

You're completely right, fixed in my local tree.

Regards,

Hans

Re: [PATCH v5 07/14] ahci-platform: "Library-ise" ahci_probe functionality

[Roger Quadros]

Hi,

On 01/22/2014 09:04 PM, Hans de Goede wrote:
> ahci_probe consists of 3 steps:
> 1) Get resources (get mmio, clks, regulator)
> 2) Enable resources, handled by ahci_platform_enable_resouces
> 3) The more or less standard ahci-host controller init sequence
> 
> This commit refactors step 1 and 3 into separate functions, so the platform
> drivers for AHCI implementations which need a specific order in step 2,
> and / or need to do some custom register poking at some time, can re-use
> ahci-platform.c code without needing to copy and paste it.
> 
> Note that ahci_platform_init_host's prototype takes the 3 non function
> members of ahci_platform_data as arguments, the idea is that drivers using
> the new exported utility functions will not use ahci_platform_data at all,
> and hopefully in the future ahci_platform_data can go away entirely.
> 
> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
> ---
>  drivers/ata/ahci_platform.c   | 158 ++++++++++++++++++++++++------------------
>  include/linux/ahci_platform.h |  14 ++++
>  2 files changed, 106 insertions(+), 66 deletions(-)
> 
> diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
> index 1cce7a2..b260ebe 100644
> --- a/drivers/ata/ahci_platform.c
> +++ b/drivers/ata/ahci_platform.c
> @@ -150,60 +150,31 @@ void ahci_platform_disable_resources(struct ahci_host_priv *hpriv)
>  EXPORT_SYMBOL_GPL(ahci_platform_disable_resources);
>  
>  
> -static void ahci_put_clks(struct ahci_host_priv *hpriv)
> -{
> -	int c;
> -
> -	for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++)
> -		clk_put(hpriv->clks[c]);
> -}
> -
> -static int ahci_probe(struct platform_device *pdev)
> +struct ahci_host_priv *ahci_platform_get_resources(
> +	struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
> -	struct ahci_platform_data *pdata = dev_get_platdata(dev);
> -	const struct platform_device_id *id = platform_get_device_id(pdev);
> -	struct ata_port_info pi = ahci_port_info[id ? id->driver_data : 0];
> -	const struct ata_port_info *ppi[] = { &pi, NULL };
>  	struct ahci_host_priv *hpriv;
> -	struct ata_host *host;
> -	struct resource *mem;
>  	struct clk *clk;
> -	int i, irq, max_clk, n_ports, rc;
> -
> -	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	if (!mem) {
> -		dev_err(dev, "no mmio space\n");
> -		return -EINVAL;
> -	}
> -
> -	irq = platform_get_irq(pdev, 0);
> -	if (irq <= 0) {
> -		dev_err(dev, "no irq\n");
> -		return -EINVAL;
> -	}
> -
> -	if (pdata && pdata->ata_port_info)
> -		pi = *pdata->ata_port_info;
> +	int i, max_clk, rc;
>  
>  	hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
>  	if (!hpriv) {
>  		dev_err(dev, "can't alloc ahci_host_priv\n");
> -		return -ENOMEM;
> +		return ERR_PTR(-ENOMEM);
>  	}
>  
> -	hpriv->flags |= (unsigned long)pi.private_data;
> -
> -	hpriv->mmio = devm_ioremap(dev, mem->start, resource_size(mem));
> +	hpriv->mmio = devm_ioremap_resource(dev,
> +			      platform_get_resource(pdev, IORESOURCE_MEM, 0));
>  	if (!hpriv->mmio) {
> -		dev_err(dev, "can't map %pR\n", mem);
> -		return -ENOMEM;
> +		dev_err(dev, "no mmio space\n");
> +		return ERR_PTR(-EINVAL);
>  	}
>  
>  	hpriv->target_pwr = devm_regulator_get_optional(dev, "target");
>  	if (IS_ERR(hpriv->target_pwr)) {
>  		if (PTR_ERR(hpriv->target_pwr) == -EPROBE_DEFER)
> -			return -EPROBE_DEFER;
> +			return ERR_PTR(-EPROBE_DEFER);
>  		hpriv->target_pwr = NULL;
>  	}
>  
> @@ -223,27 +194,48 @@ static int ahci_probe(struct platform_device *pdev)
>  		hpriv->clks[i] = clk;
>  	}
>  
> -	rc = ahci_platform_enable_resources(hpriv);
> -	if (rc)
> -		goto free_clk;
> +	return hpriv;
>  
> -	/*
> -	 * Some platforms might need to prepare for mmio region access,
> -	 * which could be done in the following init call. So, the mmio
> -	 * region shouldn't be accessed before init (if provided) has
> -	 * returned successfully.
> -	 */
> -	if (pdata && pdata->init) {
> -		rc = pdata->init(dev, hpriv);
> -		if (rc)
> -			goto disable_resources;
> -	}
> +free_clk:
> +	while (--i >= 0)
> +		clk_put(hpriv->clks[i]);
> +	return ERR_PTR(rc);
> +}
> +EXPORT_SYMBOL_GPL(ahci_platform_get_resources);
> +
> +void ahci_platform_put_resources(struct ahci_host_priv *hpriv)
> +{
> +	int c;
> +
> +	for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++)
> +		clk_put(hpriv->clks[c]);
> +}
> +EXPORT_SYMBOL_GPL(ahci_platform_put_resources);
> +
> +
> +int ahci_platform_init_host(struct platform_device *pdev,
> +			    struct ahci_host_priv *hpriv,
> +			    const struct ata_port_info *pi_template,
> +			    unsigned int force_port_map,
> +			    unsigned int mask_port_map)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct ata_port_info pi = *pi_template;
> +	const struct ata_port_info *ppi[] = { &pi, NULL };
> +	struct ata_host *host;
> +	int i, irq, n_ports, rc;
>  
> -	ahci_save_initial_config(dev, hpriv,
> -		pdata ? pdata->force_port_map : 0,
> -		pdata ? pdata->mask_port_map  : 0);
> +	irq = platform_get_irq(pdev, 0);
> +	if (irq <= 0) {
> +		dev_err(dev, "no irq\n");
> +		return -EINVAL;
> +	}
>  
>  	/* prepare host */
> +	hpriv->flags |= (unsigned long)pi.private_data;
> +
> +	ahci_save_initial_config(dev, hpriv, force_port_map, mask_port_map);
> +
>  	if (hpriv->cap & HOST_CAP_NCQ)
>  		pi.flags |= ATA_FLAG_NCQ;
>  
> @@ -260,10 +252,8 @@ static int ahci_probe(struct platform_device *pdev)
>  	n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
>  
>  	host = ata_host_alloc_pinfo(dev, ppi, n_ports);
> -	if (!host) {
> -		rc = -ENOMEM;
> -		goto pdata_exit;
> -	}
> +	if (!host)
> +		return -ENOMEM;
>  
>  	host->private_data = hpriv;
>  
> @@ -278,7 +268,8 @@ static int ahci_probe(struct platform_device *pdev)
>  	for (i = 0; i < host->n_ports; i++) {
>  		struct ata_port *ap = host->ports[i];
>  
> -		ata_port_desc(ap, "mmio %pR", mem);
> +		ata_port_desc(ap, "mmio %pR",
> +			      platform_get_resource(pdev, IORESOURCE_MEM, 0));
>  		ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80);
>  
>  		/* set enclosure management message type */
> @@ -292,13 +283,48 @@ static int ahci_probe(struct platform_device *pdev)
>  
>  	rc = ahci_reset_controller(host);
>  	if (rc)
> -		goto pdata_exit;
> +		return rc;
>  
>  	ahci_init_controller(host);
>  	ahci_print_info(host, "platform");
>  
> -	rc = ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
> -			       &ahci_platform_sht);
> +	return ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
> +				 &ahci_platform_sht);
> +}
> +EXPORT_SYMBOL_GPL(ahci_platform_init_host);
> +
> +static int ahci_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct ahci_platform_data *pdata = dev_get_platdata(dev);
> +	const struct platform_device_id *id = platform_get_device_id(pdev);
> +	struct ahci_host_priv *hpriv;
> +	int rc;
> +
> +	hpriv = ahci_platform_get_resources(pdev);
> +	if (IS_ERR(hpriv))
> +		return PTR_ERR(hpriv);
> +
> +	rc = ahci_platform_enable_resources(hpriv);
> +	if (rc)
> +		goto put_resources;
> +
> +	/*
> +	 * Some platforms might need to prepare for mmio region access,
> +	 * which could be done in the following init call. So, the mmio
> +	 * region shouldn't be accessed before init (if provided) has
> +	 * returned successfully.
> +	 */
> +	if (pdata && pdata->init) {
> +		rc = pdata->init(dev, hpriv);
> +		if (rc)
> +			goto disable_resources;
> +	}
> +
> +	rc = ahci_platform_init_host(pdev, hpriv,
> +				     &ahci_port_info[id ? id->driver_data : 0],
> +				     pdata ? pdata->force_port_map : 0,
> +				     pdata ? pdata->mask_port_map  : 0);
>  	if (rc)
>  		goto pdata_exit;
>  
> @@ -308,8 +334,8 @@ pdata_exit:
>  		pdata->exit(dev);
>  disable_resources:
>  	ahci_platform_disable_resources(hpriv);
> -free_clk:
> -	ahci_put_clks(hpriv);
> +put_resources:
> +	ahci_platform_put_resources(hpriv);
>  	return rc;
>  }
>  
> @@ -323,7 +349,7 @@ static void ahci_host_stop(struct ata_host *host)
>  		pdata->exit(dev);
>  
>  	ahci_platform_disable_resources(hpriv);
> -	ahci_put_clks(hpriv);
> +	ahci_platform_put_resources(hpriv);
>  }
>  
>  #ifdef CONFIG_PM_SLEEP
> diff --git a/include/linux/ahci_platform.h b/include/linux/ahci_platform.h
> index 5e5f85e..1dc7602 100644
> --- a/include/linux/ahci_platform.h
> +++ b/include/linux/ahci_platform.h
> @@ -20,7 +20,13 @@
>  struct device;
>  struct ata_port_info;
>  struct ahci_host_priv;
> +struct platform_device;
>  
> +/*
> + * Note ahci_platform_data is deprecated. New drivers which need to override
> + * any of these, should instead declare there own platform_driver struct, and
> + * use ahci_platform* functions in their own probe, suspend and resume methods.
> + */
>  struct ahci_platform_data {
>  	int (*init)(struct device *dev, struct ahci_host_priv *hpriv);
>  	void (*exit)(struct device *dev);
> @@ -35,5 +41,13 @@ int ahci_platform_enable_clks(struct ahci_host_priv *hpriv);
>  void ahci_platform_disable_clks(struct ahci_host_priv *hpriv);
>  int ahci_platform_enable_resources(struct ahci_host_priv *hpriv);
>  void ahci_platform_disable_resources(struct ahci_host_priv *hpriv);
> +struct ahci_host_priv *ahci_platform_get_resources(
> +	struct platform_device *pdev);

Why not use 'struct device' as the argument?

> +void ahci_platform_put_resources(struct ahci_host_priv *hpriv);

Can we have 'struct device' as the argument? Else it becomes
impossible to get 'struct device' from 'hpriv' if we need to call e.g.
pm_runtime_*() APIs.

> +int ahci_platform_init_host(struct platform_device *pdev,
> +			    struct ahci_host_priv *hpriv,
> +			    const struct ata_port_info *pi_template,
> +			    unsigned int force_port_map,
> +			    unsigned int mask_port_map);
>  
>  #endif /* _AHCI_PLATFORM_H */
> 

cheers,
-roger

Re: [PATCH v5 07/14] ahci-platform: "Library-ise" ahci_probe functionality

[Hans de Goede]

Hi,

On 01/27/2014 11:39 AM, Roger Quadros wrote:
> Hi,
>
> On 01/22/2014 09:04 PM, Hans de Goede wrote:

<snip>

>> --- a/include/linux/ahci_platform.h
>> +++ b/include/linux/ahci_platform.h
>> @@ -20,7 +20,13 @@
>>   struct device;
>>   struct ata_port_info;
>>   struct ahci_host_priv;
>> +struct platform_device;
>>
>> +/*
>> + * Note ahci_platform_data is deprecated. New drivers which need to override
>> + * any of these, should instead declare there own platform_driver struct, and
>> + * use ahci_platform* functions in their own probe, suspend and resume methods.
>> + */
>>   struct ahci_platform_data {
>>   	int (*init)(struct device *dev, struct ahci_host_priv *hpriv);
>>   	void (*exit)(struct device *dev);
>> @@ -35,5 +41,13 @@ int ahci_platform_enable_clks(struct ahci_host_priv *hpriv);
>>   void ahci_platform_disable_clks(struct ahci_host_priv *hpriv);
>>   int ahci_platform_enable_resources(struct ahci_host_priv *hpriv);
>>   void ahci_platform_disable_resources(struct ahci_host_priv *hpriv);
>> +struct ahci_host_priv *ahci_platform_get_resources(
>> +	struct platform_device *pdev);
>
> Why not use 'struct device' as the argument?

Because of calls to platform_get_resource inside the function.

>> +void ahci_platform_put_resources(struct ahci_host_priv *hpriv);
>
> Can we have 'struct device' as the argument? Else it becomes
> impossible to get 'struct device' from 'hpriv' if we need to call e.g.
> pm_runtime_*() APIs.

The plan for is for this function to go away once we have a
devm version of of_clk_get, so if you need to put pm_runtime_calls
somewhere, please don't put them here. This sounds like something which
should go in enable / disable resources instead ?

Regards,

Hans

Re: [PATCH v5 07/14] ahci-platform: "Library-ise" ahci_probe functionality

[Roger Quadros]

On 01/27/2014 12:51 PM, Hans de Goede wrote:
> Hi,
> 
> On 01/27/2014 11:39 AM, Roger Quadros wrote:
>> Hi,
>>
>> On 01/22/2014 09:04 PM, Hans de Goede wrote:
> 
> <snip>
> 
>>> --- a/include/linux/ahci_platform.h
>>> +++ b/include/linux/ahci_platform.h
>>> @@ -20,7 +20,13 @@
>>>   struct device;
>>>   struct ata_port_info;
>>>   struct ahci_host_priv;
>>> +struct platform_device;
>>>
>>> +/*
>>> + * Note ahci_platform_data is deprecated. New drivers which need to override
>>> + * any of these, should instead declare there own platform_driver struct, and
>>> + * use ahci_platform* functions in their own probe, suspend and resume methods.
>>> + */
>>>   struct ahci_platform_data {
>>>       int (*init)(struct device *dev, struct ahci_host_priv *hpriv);
>>>       void (*exit)(struct device *dev);
>>> @@ -35,5 +41,13 @@ int ahci_platform_enable_clks(struct ahci_host_priv *hpriv);
>>>   void ahci_platform_disable_clks(struct ahci_host_priv *hpriv);
>>>   int ahci_platform_enable_resources(struct ahci_host_priv *hpriv);
>>>   void ahci_platform_disable_resources(struct ahci_host_priv *hpriv);
>>> +struct ahci_host_priv *ahci_platform_get_resources(
>>> +    struct platform_device *pdev);
>>
>> Why not use 'struct device' as the argument?
> 
> Because of calls to platform_get_resource inside the function.
> 
>>> +void ahci_platform_put_resources(struct ahci_host_priv *hpriv);
>>
>> Can we have 'struct device' as the argument? Else it becomes
>> impossible to get 'struct device' from 'hpriv' if we need to call e.g.
>> pm_runtime_*() APIs.
> 
> The plan for is for this function to go away once we have a
> devm version of of_clk_get, so if you need to put pm_runtime_calls
> somewhere, please don't put them here. This sounds like something which
> should go in enable / disable resources instead ?

OK. I need to add pm_runtime_enable() + pm_runtime_get_sync() during
initialization and pm_runtime_put_sync() + pm_runtime_disable() during cleanup.

If ahci_platform_enable/disable_resources is the right place then we must be
able to access struct device from there. 

Is it a good to add 'struct device *dev' into the 'struct ahci_host_priv'?
Then you can leave this series as is and i'll add a new patch for that.

If there is a better way, please let me know.

cheers,
-roger

Re: [PATCH v5 07/14] ahci-platform: "Library-ise" ahci_probe functionality

[Hans de Goede]

Hi,

On 01/27/2014 12:03 PM, Roger Quadros wrote:
> On 01/27/2014 12:51 PM, Hans de Goede wrote:
>> Hi,
>>
>> On 01/27/2014 11:39 AM, Roger Quadros wrote:
>>> Hi,
>>>
>>> On 01/22/2014 09:04 PM, Hans de Goede wrote:
>>
>> <snip>
>>
>>>> --- a/include/linux/ahci_platform.h
>>>> +++ b/include/linux/ahci_platform.h
>>>> @@ -20,7 +20,13 @@
>>>>    struct device;
>>>>    struct ata_port_info;
>>>>    struct ahci_host_priv;
>>>> +struct platform_device;
>>>>
>>>> +/*
>>>> + * Note ahci_platform_data is deprecated. New drivers which need to override
>>>> + * any of these, should instead declare there own platform_driver struct, and
>>>> + * use ahci_platform* functions in their own probe, suspend and resume methods.
>>>> + */
>>>>    struct ahci_platform_data {
>>>>        int (*init)(struct device *dev, struct ahci_host_priv *hpriv);
>>>>        void (*exit)(struct device *dev);
>>>> @@ -35,5 +41,13 @@ int ahci_platform_enable_clks(struct ahci_host_priv *hpriv);
>>>>    void ahci_platform_disable_clks(struct ahci_host_priv *hpriv);
>>>>    int ahci_platform_enable_resources(struct ahci_host_priv *hpriv);
>>>>    void ahci_platform_disable_resources(struct ahci_host_priv *hpriv);
>>>> +struct ahci_host_priv *ahci_platform_get_resources(
>>>> +    struct platform_device *pdev);
>>>
>>> Why not use 'struct device' as the argument?
>>
>> Because of calls to platform_get_resource inside the function.
>>
>>>> +void ahci_platform_put_resources(struct ahci_host_priv *hpriv);
>>>
>>> Can we have 'struct device' as the argument? Else it becomes
>>> impossible to get 'struct device' from 'hpriv' if we need to call e.g.
>>> pm_runtime_*() APIs.
>>
>> The plan for is for this function to go away once we have a
>> devm version of of_clk_get, so if you need to put pm_runtime_calls
>> somewhere, please don't put them here. This sounds like something which
>> should go in enable / disable resources instead ?
>
> OK. I need to add pm_runtime_enable() + pm_runtime_get_sync() during
> initialization and pm_runtime_put_sync() + pm_runtime_disable() during cleanup.

Note that enable / disable resources will get called by (the default implementations
of) suspend / resume too.

If that is undesirable then I take back what I said before and
ahci_platform_put_resources' prototype should be changed to:

void ahci_platform_put_resources(struct device *dev, struct ahci_host_priv *hpriv);

And we will need to keep it around even after we get devm_of_clk_get.

> If ahci_platform_enable/disable_resources is the right place then we must be
> able to access struct device from there.

Right, and if not we need to access it from ahci_platform_put_resources(),
which is in essence the same problem.

> Is it a good to add 'struct device *dev' into the 'struct ahci_host_priv'?
> Then you can leave this series as is and i'll add a new patch for that.

Normally we get a device * as argument, and get to hpriv like this:

         struct ata_host *host = dev_get_drvdata(dev);
         struct ahci_host_priv *hpriv = host->private_data;

So having a dev * in hpriv is normally not useful.

But the ata_host gets allocated after the first ahci_platform_enable_resources
call, so we cannot use this there. Likewise disable_resources / put_resources
is used in error handling paths in probe where we don't have an ata_host yet,
so my vote goes to adding a "struct device *dev" as first argument, like I
suggested above for ahci_platform_put_resources.

This can be done as an add-on patch (if you do don't forget to also fix
ahci_sunxi.c and ahci_imx.c), or I can respin my series to have this from
day one.

If you want me to do a respin, please let me know which fix you'll need
(the put_resources or the enable/disable one).

Thanks & Regards,

Hans

Re: [PATCH v5 07/14] ahci-platform: "Library-ise" ahci_probe functionality

[Roger Quadros]

On 01/27/2014 01:28 PM, Hans de Goede wrote:
> Hi,
> 
> On 01/27/2014 12:03 PM, Roger Quadros wrote:
>> On 01/27/2014 12:51 PM, Hans de Goede wrote:
>>> Hi,
>>>
>>> On 01/27/2014 11:39 AM, Roger Quadros wrote:
>>>> Hi,
>>>>
>>>> On 01/22/2014 09:04 PM, Hans de Goede wrote:
>>>
>>> <snip>
>>>
>>>>> --- a/include/linux/ahci_platform.h
>>>>> +++ b/include/linux/ahci_platform.h
>>>>> @@ -20,7 +20,13 @@
>>>>>    struct device;
>>>>>    struct ata_port_info;
>>>>>    struct ahci_host_priv;
>>>>> +struct platform_device;
>>>>>
>>>>> +/*
>>>>> + * Note ahci_platform_data is deprecated. New drivers which need to override
>>>>> + * any of these, should instead declare there own platform_driver struct, and
>>>>> + * use ahci_platform* functions in their own probe, suspend and resume methods.
>>>>> + */
>>>>>    struct ahci_platform_data {
>>>>>        int (*init)(struct device *dev, struct ahci_host_priv *hpriv);
>>>>>        void (*exit)(struct device *dev);
>>>>> @@ -35,5 +41,13 @@ int ahci_platform_enable_clks(struct ahci_host_priv *hpriv);
>>>>>    void ahci_platform_disable_clks(struct ahci_host_priv *hpriv);
>>>>>    int ahci_platform_enable_resources(struct ahci_host_priv *hpriv);
>>>>>    void ahci_platform_disable_resources(struct ahci_host_priv *hpriv);
>>>>> +struct ahci_host_priv *ahci_platform_get_resources(
>>>>> +    struct platform_device *pdev);
>>>>
>>>> Why not use 'struct device' as the argument?
>>>
>>> Because of calls to platform_get_resource inside the function.
>>>
>>>>> +void ahci_platform_put_resources(struct ahci_host_priv *hpriv);
>>>>
>>>> Can we have 'struct device' as the argument? Else it becomes
>>>> impossible to get 'struct device' from 'hpriv' if we need to call e.g.
>>>> pm_runtime_*() APIs.
>>>
>>> The plan for is for this function to go away once we have a
>>> devm version of of_clk_get, so if you need to put pm_runtime_calls
>>> somewhere, please don't put them here. This sounds like something which
>>> should go in enable / disable resources instead ?
>>
>> OK. I need to add pm_runtime_enable() + pm_runtime_get_sync() during
>> initialization and pm_runtime_put_sync() + pm_runtime_disable() during cleanup.
> 
> Note that enable / disable resources will get called by (the default implementations
> of) suspend / resume too.
> 
> If that is undesirable then I take back what I said before and
> ahci_platform_put_resources' prototype should be changed to:
> 
> void ahci_platform_put_resources(struct device *dev, struct ahci_host_priv *hpriv);
> 
> And we will need to keep it around even after we get devm_of_clk_get.
> 
>> If ahci_platform_enable/disable_resources is the right place then we must be
>> able to access struct device from there.
> 
> Right, and if not we need to access it from ahci_platform_put_resources(),
> which is in essence the same problem.
> 
>> Is it a good to add 'struct device *dev' into the 'struct ahci_host_priv'?
>> Then you can leave this series as is and i'll add a new patch for that.
> 
> Normally we get a device * as argument, and get to hpriv like this:
> 
>         struct ata_host *host = dev_get_drvdata(dev);
>         struct ahci_host_priv *hpriv = host->private_data;
> 
> So having a dev * in hpriv is normally not useful.
> 
> But the ata_host gets allocated after the first ahci_platform_enable_resources
> call, so we cannot use this there. Likewise disable_resources / put_resources
> is used in error handling paths in probe where we don't have an ata_host yet,
> so my vote goes to adding a "struct device *dev" as first argument, like I
> suggested above for ahci_platform_put_resources.
> 
> This can be done as an add-on patch (if you do don't forget to also fix
> ahci_sunxi.c and ahci_imx.c), or I can respin my series to have this from
> day one.
> 
> If you want me to do a respin, please let me know which fix you'll need
> (the put_resources or the enable/disable one).
> 

For now I'm using get/put_resources to enable runtime PM and enable the device
like in the below patch.

I'll make the necessary changes to ahci_platform_put_resources();

cheers,
-roger

diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 5ec6fe6..965f4b4 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -23,6 +23,7 @@
 #include <linux/platform_device.h>
 #include <linux/libata.h>
 #include <linux/ahci_platform.h>
+#include <linux/pm_runtime.h>
 #include "ahci.h"
 
 static void ahci_host_stop(struct ata_host *host);
@@ -233,6 +234,9 @@ struct ahci_host_priv *ahci_platform_get_resources(
                }
        }
 
+       pm_runtime_enable(dev);
+       pm_runtime_get_sync(dev);
+
        return hpriv;
 
 free_clk:
@@ -246,6 +250,9 @@ void ahci_platform_put_resources(struct ahci_host_priv *hpriv)
 {
        int c;
 
+       pm_runtime_put_sync(dev);
+       pm_runtime_disable(dev);
+
        for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++)
                clk_put(hpriv->clks[c]);
 }
@@ -478,6 +485,11 @@ int ahci_platform_resume(struct device *dev)
        if (rc)
                goto disable_resources;
 
+       /* We resumed so update PM runtime state */
+       pm_runtime_disable(dev);
+       pm_runtime_set_active(dev);
+       pm_runtime_enable(dev);
+
        return 0;
 
 disable_resources:

Re: [PATCH v5 13/14] ARM: sun4i: dts: Add ahci / sata support

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 4238 bytes --]

Hi Hans,

On Wed, Jan 22, 2014 at 08:04:48PM +0100, Hans de Goede wrote:
> From: Oliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org>
> 
> This patch adds sunxi sata support to A10 boards that have such a connector.
> Some boards also feature a regulator via a GPIO and support for this is also
> added.
> 
> Signed-off-by: Olliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org>
> Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> ---
>  arch/arm/boot/dts/sun4i-a10-a1000.dts      |  4 ++++
>  arch/arm/boot/dts/sun4i-a10-cubieboard.dts |  6 +++++
>  arch/arm/boot/dts/sun4i-a10.dtsi           |  8 +++++++
>  arch/arm/boot/dts/sunxi-ahci-reg.dtsi      | 38 ++++++++++++++++++++++++++++++

I'm still half convinced about this at the moment, given the number of
platforms we support, we can always change it back if things become too messy.

>  4 files changed, 56 insertions(+)
>  create mode 100644 arch/arm/boot/dts/sunxi-ahci-reg.dtsi
> 
> diff --git a/arch/arm/boot/dts/sun4i-a10-a1000.dts b/arch/arm/boot/dts/sun4i-a10-a1000.dts
> index aef8207..3fb7305 100644
> --- a/arch/arm/boot/dts/sun4i-a10-a1000.dts
> +++ b/arch/arm/boot/dts/sun4i-a10-a1000.dts
> @@ -48,6 +48,10 @@
>  			status = "okay";
>  		};
>  
> +		ahci: sata@01c18000 {
> +			status = "okay";
> +		};
> +
>  		pinctrl@01c20800 {
>  			mmc0_cd_pin_a1000: mmc0_cd_pin@0 {
>  				allwinner,pins = "PH1";
> diff --git a/arch/arm/boot/dts/sun4i-a10-cubieboard.dts b/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
> index f50fb2b..6ae1110 100644
> --- a/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
> +++ b/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
> @@ -12,6 +12,7 @@
>  
>  /dts-v1/;
>  /include/ "sun4i-a10.dtsi"
> +/include/ "sunxi-ahci-reg.dtsi"
>  
>  / {
>  	model = "Cubietech Cubieboard";
> @@ -51,6 +52,11 @@
>  			status = "okay";
>  		};
>  
> +		ahci: sata@01c18000 {
> +			target-supply = <&reg_ahci_5v>;
> +			status = "okay";
> +		};
> +
>  		pinctrl@01c20800 {
>  			mmc0_cd_pin_cubieboard: mmc0_cd_pin@0 {
>  				allwinner,pins = "PH1";
> diff --git a/arch/arm/boot/dts/sun4i-a10.dtsi b/arch/arm/boot/dts/sun4i-a10.dtsi
> index 4736dd2..198dcda 100644
> --- a/arch/arm/boot/dts/sun4i-a10.dtsi
> +++ b/arch/arm/boot/dts/sun4i-a10.dtsi
> @@ -331,6 +331,14 @@
>  			status = "disabled";
>  		};
>  
> +		ahci: sata@01c18000 {
> +			compatible = "allwinner,sun4i-a10-ahci";

To be consistent with the rest of the sun4i devices compatible, It
should be sun4i-ahci.

However, since these devices don't use the same compatible pattern as
their own machine compatible, and are consisent with the rest of the
compatibles for the other SoCs, we can probably make this a go to
transition progressively to this pattern.

I'll cook up some patches for the other devices.

> +			reg = <0x01c18000 0x1000>;
> +			interrupts = <56>;
> +			clocks = <&pll6 0>, <&ahb_gates 25>;
> +			status = "disabled";
> +		};
> +
>  		intc: interrupt-controller@01c20400 {
>  			compatible = "allwinner,sun4i-ic";
>  			reg = <0x01c20400 0x400>;
> diff --git a/arch/arm/boot/dts/sunxi-ahci-reg.dtsi b/arch/arm/boot/dts/sunxi-ahci-reg.dtsi
> new file mode 100644
> index 0000000..955b197
> --- /dev/null
> +++ b/arch/arm/boot/dts/sunxi-ahci-reg.dtsi
> @@ -0,0 +1,38 @@
> +/*
> + * sunxi boards sata target power supply common code
> + *
> + * Copyright 2014 - Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> + *
> + * The code contained herein is licensed under the GNU General Public
> + * License. You may obtain a copy of the GNU General Public License
> + * Version 2 or later at the following locations:
> + *
> + * http://www.opensource.org/licenses/gpl-license.html
> + * http://www.gnu.org/copyleft/gpl.html
> + */
> +
> +/ {
> +	soc@01c00000 {
> +		ahci_pwr_pin_a: ahci_pwr_pin@0 {
> +			allwinner,pins = "PB8";
> +			allwinner,function = "gpio_out";
> +			allwinner,drive = <0>;
> +			allwinner,pull = <0>;
> +		};

This should be under the pinctrl node.

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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Re: [PATCH v5 14/14] ARM: sun7i: dts: Add ahci / sata support

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 4019 bytes --]

On Wed, Jan 22, 2014 at 08:04:49PM +0100, Hans de Goede wrote:
> This patch adds sunxi sata support to A20 boards that have such a connector.
> Some boards also feature a regulator via a GPIO and support for this is also
> added.
> 
> Signed-off-by: Olliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org>
> Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> ---
>  arch/arm/boot/dts/sun7i-a20-cubieboard2.dts     |  6 ++++++
>  arch/arm/boot/dts/sun7i-a20-cubietruck.dts      | 20 ++++++++++++++++++++
>  arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts |  6 ++++++
>  arch/arm/boot/dts/sun7i-a20.dtsi                |  8 ++++++++
>  4 files changed, 40 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/sun7i-a20-cubieboard2.dts b/arch/arm/boot/dts/sun7i-a20-cubieboard2.dts
> index 48777cd..1cab521 100644
> --- a/arch/arm/boot/dts/sun7i-a20-cubieboard2.dts
> +++ b/arch/arm/boot/dts/sun7i-a20-cubieboard2.dts
> @@ -13,6 +13,7 @@
>  
>  /dts-v1/;
>  /include/ "sun7i-a20.dtsi"
> +/include/ "sunxi-ahci-reg.dtsi"
>  
>  / {
>  	model = "Cubietech Cubieboard2";
> @@ -28,6 +29,11 @@
>  			status = "okay";
>  		};
>  
> +		ahci: sata@01c18000 {
> +			target-supply = <&reg_ahci_5v>;
> +			status = "okay";
> +		};
> +
>  		pinctrl@01c20800 {
>  			mmc0_cd_pin_cubieboard2: mmc0_cd_pin@0 {
>  				allwinner,pins = "PH1";
> diff --git a/arch/arm/boot/dts/sun7i-a20-cubietruck.dts b/arch/arm/boot/dts/sun7i-a20-cubietruck.dts
> index 2684f27..1247ea1 100644
> --- a/arch/arm/boot/dts/sun7i-a20-cubietruck.dts
> +++ b/arch/arm/boot/dts/sun7i-a20-cubietruck.dts
> @@ -13,6 +13,7 @@
>  
>  /dts-v1/;
>  /include/ "sun7i-a20.dtsi"
> +/include/ "sunxi-ahci-reg.dtsi"
>  
>  / {
>  	model = "Cubietech Cubietruck";
> @@ -28,6 +29,11 @@
>  			status = "okay";
>  		};
>  
> +		ahci: sata@01c18000 {
> +			target-supply = <&reg_ahci_5v>;
> +			status = "okay";
> +		};
> +
>  		pinctrl@01c20800 {
>  			mmc0_cd_pin_cubietruck: mmc0_cd_pin@0 {
>  				allwinner,pins = "PH1";
> @@ -36,6 +42,13 @@
>  				allwinner,pull = <0>;
>  			};
>  
> +			ahci_pwr_pin_cubietruck: ahci_pwr_pin@1 {
> +				allwinner,pins = "PH12";
> +				allwinner,function = "gpio_out";
> +				allwinner,drive = <0>;
> +				allwinner,pull = <0>;
> +			};
> +
>  			led_pins_cubietruck: led_pins@0 {
>  				allwinner,pins = "PH7", "PH11", "PH20", "PH21";
>  				allwinner,function = "gpio_out";
> @@ -84,4 +97,11 @@
>  			gpios = <&pio 7 7 0>;
>  		};
>  	};
> +
> +	regulators {
> +		reg_ahci_5v: ahci-5v {
> +			pinctrl-0 = <&ahci_pwr_pin_cubietruck>;
> +			gpio = <&pio 7 12 0>;
> +		};
> +	};
>  };
> diff --git a/arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts b/arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts
> index bf6f6c8..f135886 100644
> --- a/arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts
> +++ b/arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts
> @@ -13,6 +13,7 @@
>  
>  /dts-v1/;
>  /include/ "sun7i-a20.dtsi"
> +/include/ "sunxi-ahci-reg.dtsi"
>  
>  / {
>  	model = "Olimex A20-Olinuxino Micro";
> @@ -37,6 +38,11 @@
>  			status = "okay";
>  		};
>  
> +		ahci: sata@01c18000 {
> +			target-supply = <&reg_ahci_5v>;
> +			status = "okay";
> +		};
> +
>  		pinctrl@01c20800 {
>  			mmc0_cd_pin_olinuxinom: mmc0_cd_pin@0 {
>  				allwinner,pins = "PH1";
> diff --git a/arch/arm/boot/dts/sun7i-a20.dtsi b/arch/arm/boot/dts/sun7i-a20.dtsi
> index c9c123a..0657bad 100644
> --- a/arch/arm/boot/dts/sun7i-a20.dtsi
> +++ b/arch/arm/boot/dts/sun7i-a20.dtsi
> @@ -347,6 +347,14 @@
>  			status = "disabled";
>  		};
>  
> +		ahci: sata@01c18000 {
> +			compatible = "allwinner,sun4i-a10-ahci";
> +			reg = <0x01c18000 0x1000>;
> +			interrupts = <0 56 1>;

This is supposed to be a level triggered interrupt, not an edge
triggered one.

Thanks for your work!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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Re: [PATCH v5 13/14] ARM: sun4i: dts: Add ahci / sata support

[Hans de Goede]

Hi,

On 01/31/2014 02:45 PM, Maxime Ripard wrote:
> Hi Hans,
>
> On Wed, Jan 22, 2014 at 08:04:48PM +0100, Hans de Goede wrote:
>> From: Oliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org>
>>
>> This patch adds sunxi sata support to A10 boards that have such a connector.
>> Some boards also feature a regulator via a GPIO and support for this is also
>> added.
>>
>> Signed-off-by: Olliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org>
>> Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
>> ---
>>   arch/arm/boot/dts/sun4i-a10-a1000.dts      |  4 ++++
>>   arch/arm/boot/dts/sun4i-a10-cubieboard.dts |  6 +++++
>>   arch/arm/boot/dts/sun4i-a10.dtsi           |  8 +++++++
>>   arch/arm/boot/dts/sunxi-ahci-reg.dtsi      | 38 ++++++++++++++++++++++++++++++
>
> I'm still half convinced about this at the moment, given the number of
> platforms we support, we can always change it back if things become too messy.

I assume that this == sunxi-ahci-reg.dtsi ?  To be sure I understand you correctly,
you're ok with going this route for now, right ?

How about the same for the usb ohci/ehci controller dts patches ? Currently they
are still using the put a regulator node in each dts file model, which leads to
a lot of boilerplate code. So I would like to move to the same model as I'm
using here for the sata supply.


>
>>   4 files changed, 56 insertions(+)
>>   create mode 100644 arch/arm/boot/dts/sunxi-ahci-reg.dtsi
>>
>> diff --git a/arch/arm/boot/dts/sun4i-a10-a1000.dts b/arch/arm/boot/dts/sun4i-a10-a1000.dts
>> index aef8207..3fb7305 100644
>> --- a/arch/arm/boot/dts/sun4i-a10-a1000.dts
>> +++ b/arch/arm/boot/dts/sun4i-a10-a1000.dts
>> @@ -48,6 +48,10 @@
>>   			status = "okay";
>>   		};
>>
>> +		ahci: sata@01c18000 {
>> +			status = "okay";
>> +		};
>> +
>>   		pinctrl@01c20800 {
>>   			mmc0_cd_pin_a1000: mmc0_cd_pin@0 {
>>   				allwinner,pins = "PH1";
>> diff --git a/arch/arm/boot/dts/sun4i-a10-cubieboard.dts b/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
>> index f50fb2b..6ae1110 100644
>> --- a/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
>> +++ b/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
>> @@ -12,6 +12,7 @@
>>
>>   /dts-v1/;
>>   /include/ "sun4i-a10.dtsi"
>> +/include/ "sunxi-ahci-reg.dtsi"
>>
>>   / {
>>   	model = "Cubietech Cubieboard";
>> @@ -51,6 +52,11 @@
>>   			status = "okay";
>>   		};
>>
>> +		ahci: sata@01c18000 {
>> +			target-supply = <&reg_ahci_5v>;
>> +			status = "okay";
>> +		};
>> +
>>   		pinctrl@01c20800 {
>>   			mmc0_cd_pin_cubieboard: mmc0_cd_pin@0 {
>>   				allwinner,pins = "PH1";
>> diff --git a/arch/arm/boot/dts/sun4i-a10.dtsi b/arch/arm/boot/dts/sun4i-a10.dtsi
>> index 4736dd2..198dcda 100644
>> --- a/arch/arm/boot/dts/sun4i-a10.dtsi
>> +++ b/arch/arm/boot/dts/sun4i-a10.dtsi
>> @@ -331,6 +331,14 @@
>>   			status = "disabled";
>>   		};
>>
>> +		ahci: sata@01c18000 {
>> +			compatible = "allwinner,sun4i-a10-ahci";
>
> To be consistent with the rest of the sun4i devices compatible, It
> should be sun4i-ahci.
>
> However, since these devices don't use the same compatible pattern as
> their own machine compatible, and are consisent with the rest of the
> compatibles for the other SoCs, we can probably make this a go to
> transition progressively to this pattern.

Ack, I think it would be good to be consistent and try to use
sun?i-aXX-foo everywhere. I noticed that we already use that in various
places, so I thought it would be good to do that for all new dts bindings.

> I'll cook up some patches for the other devices.

Thanks.

>
>> +			reg = <0x01c18000 0x1000>;
>> +			interrupts = <56>;
>> +			clocks = <&pll6 0>, <&ahb_gates 25>;
>> +			status = "disabled";
>> +		};
>> +
>>   		intc: interrupt-controller@01c20400 {
>>   			compatible = "allwinner,sun4i-ic";
>>   			reg = <0x01c20400 0x400>;
>> diff --git a/arch/arm/boot/dts/sunxi-ahci-reg.dtsi b/arch/arm/boot/dts/sunxi-ahci-reg.dtsi
>> new file mode 100644
>> index 0000000..955b197
>> --- /dev/null
>> +++ b/arch/arm/boot/dts/sunxi-ahci-reg.dtsi
>> @@ -0,0 +1,38 @@
>> +/*
>> + * sunxi boards sata target power supply common code
>> + *
>> + * Copyright 2014 - Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
>> + *
>> + * The code contained herein is licensed under the GNU General Public
>> + * License. You may obtain a copy of the GNU General Public License
>> + * Version 2 or later at the following locations:
>> + *
>> + * http://www.opensource.org/licenses/gpl-license.html
>> + * http://www.gnu.org/copyleft/gpl.html
>> + */
>> +
>> +/ {
>> +	soc@01c00000 {
>> +		ahci_pwr_pin_a: ahci_pwr_pin@0 {
>> +			allwinner,pins = "PB8";
>> +			allwinner,function = "gpio_out";
>> +			allwinner,drive = <0>;
>> +			allwinner,pull = <0>;
>> +		};
>
> This should be under the pinctrl node.

Fixed already locally.

Regards,

Hans

Re: [PATCH v5 08/14] ahci-platform: "Library-ise" suspend / resume functionality

[Arnd Bergmann]

On Wednesday 22 January 2014, Hans de Goede wrote:
> --- a/include/linux/ahci_platform.h
> +++ b/include/linux/ahci_platform.h
> @@ -50,4 +50,11 @@ int ahci_platform_init_host(struct platform_device *pdev,
>                             unsigned int force_port_map,
>                             unsigned int mask_port_map);
>  
> +#ifdef CONFIG_PM_SLEEP
> +int ahci_platform_suspend_host(struct device *dev);
> +int ahci_platform_resume_host(struct device *dev);
> +int ahci_platform_suspend(struct device *dev);
> +int ahci_platform_resume(struct device *dev);
> +#endif
> +

Not sure if the #ifdef does any good here. Normally, we don't hide declarations
so we can do stuff like

	if (IS_ENABLED(CONFIG_PM_SLEEP))
		ret = ahci_platform_suspend_host(dev);

and expect the code to compile and link just fine.

	Arnd

Re: [PATCH v5 00/14] ahci: library-ise ahci_platform, add sunxi driver and cleanup imx driver

[Tejun Heo]

Hello,

On Wed, Jan 22, 2014 at 08:04:35PM +0100, Hans de Goede wrote:
> Here is v4 of my patchset for adding ahci-sunxi support. It has grown quite
> a bit since I've been going for a more generic approach this time and I've
> also cleaned up the ahci-imx driver to use the same generic approach.

On top of which tree were these patches generated?  They don't apply
to 3.14-rc1.

Thanks.

-- 
tejun

Re: [PATCH v5 00/14] ahci: library-ise ahci_platform, add sunxi driver and cleanup imx driver

[Hans de Goede]

Hi,

On 02/03/2014 05:09 PM, Tejun Heo wrote:
> Hello,
> 
> On Wed, Jan 22, 2014 at 08:04:35PM +0100, Hans de Goede wrote:
>> Here is v4 of my patchset for adding ahci-sunxi support. It has grown quite
>> a bit since I've been going for a more generic approach this time and I've
>> also cleaned up the ahci-imx driver to use the same generic approach.
> 
> On top of which tree were these patches generated?  They don't apply
> to 3.14-rc1.

They are on top of 3.13, I'll rebase them, address Maxime's review of
the dts bits and send a new version sometime during the next couple of days.

Thanks,

Hans

Re: [PATCH v5 14/14] ARM: sun7i: dts: Add ahci / sata support

[Hans de Goede]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi,

On 01/31/2014 02:46 PM, Maxime Ripard wrote:
> On Wed, Jan 22, 2014 at 08:04:49PM +0100, Hans de Goede wrote:
>> This patch adds sunxi sata support to A20 boards that have such a connector. Some boards also feature a regulator via a GPIO and support for this is also added.
>> 
>> Signed-off-by: Olliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org> Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> --- arch/arm/boot/dts/sun7i-a20-cubieboard2.dts     |  6 ++++++ arch/arm/boot/dts/sun7i-a20-cubietruck.dts      | 20 ++++++++++++++++++++ arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts |  6 ++++++ arch/arm/boot/dts/sun7i-a20.dtsi                |  8 ++++++++ 4 files changed, 40 insertions(+)
>> 
>> diff --git a/arch/arm/boot/dts/sun7i-a20-cubieboard2.dts b/arch/arm/boot/dts/sun7i-a20-cubieboard2.dts index 48777cd..1cab521 100644 --- a/arch/arm/boot/dts/sun7i-a20-cubieboard2.dts +++ b/arch/arm/boot/dts/sun7i-a20-cubieboard2.dts @@ -13,6 +13,7 @@
>> 
>> /dts-v1/; /include/ "sun7i-a20.dtsi" +/include/ "sunxi-ahci-reg.dtsi"
>> 
>> / { model = "Cubietech Cubieboard2"; @@ -28,6 +29,11 @@ status = "okay"; };
>> 
>> +		ahci: sata@01c18000 { +			target-supply = <&reg_ahci_5v>; +			status = "okay"; +		}; + pinctrl@01c20800 { mmc0_cd_pin_cubieboard2: mmc0_cd_pin@0 { allwinner,pins = "PH1"; diff --git a/arch/arm/boot/dts/sun7i-a20-cubietruck.dts b/arch/arm/boot/dts/sun7i-a20-cubietruck.dts index 2684f27..1247ea1 100644 --- a/arch/arm/boot/dts/sun7i-a20-cubietruck.dts +++ b/arch/arm/boot/dts/sun7i-a20-cubietruck.dts @@ -13,6 +13,7 @@
>> 
>> /dts-v1/; /include/ "sun7i-a20.dtsi" +/include/ "sunxi-ahci-reg.dtsi"
>> 
>> / { model = "Cubietech Cubietruck"; @@ -28,6 +29,11 @@ status = "okay"; };
>> 
>> +		ahci: sata@01c18000 { +			target-supply = <&reg_ahci_5v>; +			status = "okay"; +		}; + pinctrl@01c20800 { mmc0_cd_pin_cubietruck: mmc0_cd_pin@0 { allwinner,pins = "PH1"; @@ -36,6 +42,13 @@ allwinner,pull = <0>; };
>> 
>> +			ahci_pwr_pin_cubietruck: ahci_pwr_pin@1 { +				allwinner,pins = "PH12"; +				allwinner,function = "gpio_out"; +				allwinner,drive = <0>; +				allwinner,pull = <0>; +			}; + led_pins_cubietruck: led_pins@0 { allwinner,pins = "PH7", "PH11", "PH20", "PH21"; allwinner,function = "gpio_out"; @@ -84,4 +97,11 @@ gpios = <&pio 7 7 0>; }; }; + +	regulators { +		reg_ahci_5v: ahci-5v { +			pinctrl-0 = <&ahci_pwr_pin_cubietruck>; +			gpio = <&pio 7 12 0>; +		}; +	}; }; diff --git a/arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts b/arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts index
>> bf6f6c8..f135886 100644 --- a/arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts +++ b/arch/arm/boot/dts/sun7i-a20-olinuxino-micro.dts @@ -13,6 +13,7 @@
>> 
>> /dts-v1/; /include/ "sun7i-a20.dtsi" +/include/ "sunxi-ahci-reg.dtsi"
>> 
>> / { model = "Olimex A20-Olinuxino Micro"; @@ -37,6 +38,11 @@ status = "okay"; };
>> 
>> +		ahci: sata@01c18000 { +			target-supply = <&reg_ahci_5v>; +			status = "okay"; +		}; + pinctrl@01c20800 { mmc0_cd_pin_olinuxinom: mmc0_cd_pin@0 { allwinner,pins = "PH1"; diff --git a/arch/arm/boot/dts/sun7i-a20.dtsi b/arch/arm/boot/dts/sun7i-a20.dtsi index c9c123a..0657bad 100644 --- a/arch/arm/boot/dts/sun7i-a20.dtsi +++ b/arch/arm/boot/dts/sun7i-a20.dtsi @@ -347,6 +347,14 @@ status = "disabled"; };
>> 
>> +		ahci: sata@01c18000 { +			compatible = "allwinner,sun4i-a10-ahci"; +			reg = <0x01c18000 0x1000>; +			interrupts = <0 56 1>;
> 
> This is supposed to be a level triggered interrupt, not an edge triggered one.

Good catch, will fix for the next version.

Regards,

Hans
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Re: [PATCH v5 13/14] ARM: sun4i: dts: Add ahci / sata support

[Maxime Ripard]

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On Mon, Feb 03, 2014 at 11:35:14AM +0100, Hans de Goede wrote:
> Hi,
> 
> On 01/31/2014 02:45 PM, Maxime Ripard wrote:
> >Hi Hans,
> >
> >On Wed, Jan 22, 2014 at 08:04:48PM +0100, Hans de Goede wrote:
> >>From: Oliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org>
> >>
> >>This patch adds sunxi sata support to A10 boards that have such a connector.
> >>Some boards also feature a regulator via a GPIO and support for this is also
> >>added.
> >>
> >>Signed-off-by: Olliver Schinagl <oliver-dxLnbx3+1qmEVqv0pETR8A@public.gmane.org>
> >>Signed-off-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> >>---
> >>  arch/arm/boot/dts/sun4i-a10-a1000.dts      |  4 ++++
> >>  arch/arm/boot/dts/sun4i-a10-cubieboard.dts |  6 +++++
> >>  arch/arm/boot/dts/sun4i-a10.dtsi           |  8 +++++++
> >>  arch/arm/boot/dts/sunxi-ahci-reg.dtsi      | 38 ++++++++++++++++++++++++++++++
> >
> >I'm still half convinced about this at the moment, given the number of
> >platforms we support, we can always change it back if things become too messy.
> 
> I assume that this == sunxi-ahci-reg.dtsi ?  To be sure I understand
> you correctly, you're ok with going this route for now, right ?

Yep.

> How about the same for the usb ohci/ehci controller dts patches ? Currently they
> are still using the put a regulator node in each dts file model, which leads to
> a lot of boilerplate code. So I would like to move to the same model as I'm
> using here for the sata supply.

That would make sense too.

> >>  4 files changed, 56 insertions(+)
> >>  create mode 100644 arch/arm/boot/dts/sunxi-ahci-reg.dtsi
> >>
> >>diff --git a/arch/arm/boot/dts/sun4i-a10-a1000.dts b/arch/arm/boot/dts/sun4i-a10-a1000.dts
> >>index aef8207..3fb7305 100644
> >>--- a/arch/arm/boot/dts/sun4i-a10-a1000.dts
> >>+++ b/arch/arm/boot/dts/sun4i-a10-a1000.dts
> >>@@ -48,6 +48,10 @@
> >>  			status = "okay";
> >>  		};
> >>
> >>+		ahci: sata@01c18000 {
> >>+			status = "okay";
> >>+		};
> >>+
> >>  		pinctrl@01c20800 {
> >>  			mmc0_cd_pin_a1000: mmc0_cd_pin@0 {
> >>  				allwinner,pins = "PH1";
> >>diff --git a/arch/arm/boot/dts/sun4i-a10-cubieboard.dts b/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
> >>index f50fb2b..6ae1110 100644
> >>--- a/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
> >>+++ b/arch/arm/boot/dts/sun4i-a10-cubieboard.dts
> >>@@ -12,6 +12,7 @@
> >>
> >>  /dts-v1/;
> >>  /include/ "sun4i-a10.dtsi"
> >>+/include/ "sunxi-ahci-reg.dtsi"
> >>
> >>  / {
> >>  	model = "Cubietech Cubieboard";
> >>@@ -51,6 +52,11 @@
> >>  			status = "okay";
> >>  		};
> >>
> >>+		ahci: sata@01c18000 {
> >>+			target-supply = <&reg_ahci_5v>;
> >>+			status = "okay";
> >>+		};
> >>+
> >>  		pinctrl@01c20800 {
> >>  			mmc0_cd_pin_cubieboard: mmc0_cd_pin@0 {
> >>  				allwinner,pins = "PH1";
> >>diff --git a/arch/arm/boot/dts/sun4i-a10.dtsi b/arch/arm/boot/dts/sun4i-a10.dtsi
> >>index 4736dd2..198dcda 100644
> >>--- a/arch/arm/boot/dts/sun4i-a10.dtsi
> >>+++ b/arch/arm/boot/dts/sun4i-a10.dtsi
> >>@@ -331,6 +331,14 @@
> >>  			status = "disabled";
> >>  		};
> >>
> >>+		ahci: sata@01c18000 {
> >>+			compatible = "allwinner,sun4i-a10-ahci";
> >
> >To be consistent with the rest of the sun4i devices compatible, It
> >should be sun4i-ahci.
> >
> >However, since these devices don't use the same compatible pattern as
> >their own machine compatible, and are consisent with the rest of the
> >compatibles for the other SoCs, we can probably make this a go to
> >transition progressively to this pattern.
> 
> Ack, I think it would be good to be consistent and try to use
> sun?i-aXX-foo everywhere. I noticed that we already use that in various
> places, so I thought it would be good to do that for all new dts bindings.

Yes, that's my plan.

> >I'll cook up some patches for the other devices.
> 
> Thanks.

And I sent them on sunday.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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Re: [PATCH v5 08/14] ahci-platform: "Library-ise" suspend / resume functionality

[Hans de Goede]

Hi,

On 02/03/2014 03:53 PM, Arnd Bergmann wrote:
> On Wednesday 22 January 2014, Hans de Goede wrote:
>> --- a/include/linux/ahci_platform.h
>> +++ b/include/linux/ahci_platform.h
>> @@ -50,4 +50,11 @@ int ahci_platform_init_host(struct platform_device *pdev,
>>                             unsigned int force_port_map,
>>                             unsigned int mask_port_map);
>>  
>> +#ifdef CONFIG_PM_SLEEP
>> +int ahci_platform_suspend_host(struct device *dev);
>> +int ahci_platform_resume_host(struct device *dev);
>> +int ahci_platform_suspend(struct device *dev);
>> +int ahci_platform_resume(struct device *dev);
>> +#endif
>> +
> 
> Not sure if the #ifdef does any good here. Normally, we don't hide declarations
> so we can do stuff like

Thanks for the review, I'll remove the #ifdef in the next version of this patch-set.

Regards,

Hans