--- /dev/null
+From 3b5db9d024f173c30ef4060c31bb8e9fbd194cc1 Mon Sep 17 00:00:00 2001
+From: Hans de Goede <hdegoede@redhat.com>
+Date: Mon, 2 Dec 2013 16:13:32 +0100
+Subject: [PATCH] libahci: Allow drivers to override start_engine
+
+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@redhat.com>
+---
+ drivers/ata/ahci.c | 6 ++++--
+ drivers/ata/ahci.h | 6 ++++++
+ drivers/ata/libahci.c | 26 +++++++++++++++++++-------
+ drivers/ata/sata_highbank.c | 3 ++-
+ 4 files changed, 31 insertions(+), 10 deletions(-)
+
+diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
+index c81d809..8bfc477 100644
+--- a/drivers/ata/ahci.c
++++ b/drivers/ata/ahci.c
+@@ -578,6 +578,7 @@ 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;
+
+@@ -588,7 +589,7 @@ 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);
+
+@@ -603,6 +604,7 @@ 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;
+@@ -618,7 +620,7 @@ 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..64d1a99d 100644
+--- a/drivers/ata/ahci.h
++++ b/drivers/ata/ahci.h
+@@ -323,6 +323,12 @@ 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, if not set this gets set to the
++ * default ahci_start_engine during ahci_save_initial_config, this can
++ * be overridden anytime before the host is activated.
++ */
++ void (*start_engine)(struct ata_port *ap);
+ };
+
+ extern int ahci_ignore_sss;
+diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
+index 36605ab..f839bb3 100644
+--- a/drivers/ata/libahci.c
++++ b/drivers/ata/libahci.c
+@@ -394,6 +394,9 @@ static ssize_t ahci_show_em_supported(struct device *dev,
+ *
+ * If inconsistent, config values are fixed up by this function.
+ *
++ * If it is not set already this function sets hpriv->start_engine to
++ * ahci_start_engine.
++ *
+ * LOCKING:
+ * None.
+ */
+@@ -500,6 +503,9 @@ 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);
+
+@@ -766,7 +772,7 @@ 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 +1240,7 @@ 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 +1432,7 @@ 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 +1450,7 @@ 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 +2014,12 @@ 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 +2040,7 @@ 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 +2104,7 @@ 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 +2116,7 @@ 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 +2145,12 @@ 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 +2178,7 @@ 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 870b11e..b3b18d1 100644
+--- a/drivers/ata/sata_highbank.c
++++ b/drivers/ata/sata_highbank.c
+@@ -403,6 +403,7 @@ 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;
+@@ -431,7 +432,7 @@ 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);
+--
+2.0.3
+
+From fcc3a79f048480e6723b0cfd294f9eecbf73dfd9 Mon Sep 17 00:00:00 2001
+From: Hans de Goede <hdegoede@redhat.com>
+Date: Thu, 16 Jan 2014 14:32:35 +0100
+Subject: [PATCH] ahci-platform: Add support for devices with more then 1 clock
+
+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@redhat.com>
+---
+ .../devicetree/bindings/ata/ahci-platform.txt | 1 +
+ drivers/ata/ahci.h | 3 +-
+ drivers/ata/ahci_platform.c | 119 ++++++++++++++++-----
+ include/linux/ahci_platform.h | 4 +
+ 4 files changed, 99 insertions(+), 28 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.h b/drivers/ata/ahci.h
+index 64d1a99d..c12862b 100644
+--- a/drivers/ata/ahci.h
++++ b/drivers/ata/ahci.h
+@@ -51,6 +51,7 @@
+
+ enum {
+ AHCI_MAX_PORTS = 32,
++ AHCI_MAX_CLKS = 3,
+ AHCI_MAX_SG = 168, /* hardware max is 64K */
+ AHCI_DMA_BOUNDARY = 0xffffffff,
+ AHCI_MAX_CMDS = 32,
+@@ -321,7 +322,7 @@ 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; /* Only for platforms supporting clk */
++ struct clk *clks[AHCI_MAX_CLKS]; /* Optional */
+ void *plat_data; /* Other platform data */
+ /*
+ * Optional ahci_start_engine override, if not set this gets set to the
+diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
+index 4b231ba..609975d 100644
+--- a/drivers/ata/ahci_platform.c
++++ b/drivers/ata/ahci_platform.c
+@@ -87,6 +87,66 @@ static struct scsi_host_template ahci_platform_sht = {
+ AHCI_SHT("ahci_platform"),
+ };
+
++/**
++ * ahci_platform_enable_clks - Enable platform clocks
++ * @hpriv: host private area to store config values
++ *
++ * This function enables all the clks found in hpriv->clks, starting
++ * at index 0. If any clk fails to enable it disables all the clks
++ * already enabled in reverse order, and then returns an error.
++ *
++ * LOCKING:
++ * None.
++ *
++ * RETURNS:
++ * 0 on success otherwise a negative error code
++ */
++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);
++
++/**
++ * ahci_platform_disable_clks - Disable platform clocks
++ * @hpriv: host private area to store config values
++ *
++ * This function disables all the clks found in hpriv->clks, in reverse
++ * order of ahci_platform_enable_clks (starting at the end of the array).
++ *
++ * LOCKING:
++ * None.
++ */
++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;
+@@ -97,6 +157,7 @@ static int ahci_probe(struct platform_device *pdev)
+ struct ahci_host_priv *hpriv;
+ struct ata_host *host;
+ struct resource *mem;
++ struct clk *clk;
+ int irq;
+ int n_ports;
+ int i;
+@@ -131,17 +192,31 @@ 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;
++ for (i = 0; i < AHCI_MAX_CLKS; i++) {
++ /*
++ * For now we must use clk_get(dev, NULL) for the first clock,
++ * because some platforms (da850, spear13xx) are not yet
++ * converted to use devicetree for clocks. For new platforms
++ * this is equivalent to of_clk_get(dev->of_node, 0).
++ */
++ if (i == 0)
++ clk = clk_get(dev, NULL);
++ 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 +297,9 @@ static int ahci_probe(struct platform_device *pdev)
+ 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 +312,8 @@ 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 +348,7 @@ 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 +360,9 @@ 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 +383,7 @@ 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_platform.h b/include/linux/ahci_platform.h
+index 73a2500..769d065 100644
+--- a/include/linux/ahci_platform.h
++++ b/include/linux/ahci_platform.h
+@@ -19,6 +19,7 @@
+
+ struct device;
+ struct ata_port_info;
++struct ahci_host_priv;
+
+ struct ahci_platform_data {
+ int (*init)(struct device *dev, void __iomem *addr);
+@@ -30,4 +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 */
+--
+2.0.3
+
+From 3dc53b267843b6dfeb2eb67e52e17915dc2347ab Mon Sep 17 00:00:00 2001
+From: Hans de Goede <hdegoede@redhat.com>
+Date: Fri, 17 Jan 2014 13:23:21 +0100
+Subject: [PATCH] ahci-platform: Add support for an optional regulator for
+ sata-target power
+
+Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+---
+ .../devicetree/bindings/ata/ahci-platform.txt | 1 +
+ drivers/ata/ahci.h | 2 ++
+ drivers/ata/ahci_platform.c | 36 ++++++++++++++++++++--
+ 3 files changed, 37 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.h b/drivers/ata/ahci.h
+index c12862b..bf8100c 100644
+--- a/drivers/ata/ahci.h
++++ b/drivers/ata/ahci.h
+@@ -37,6 +37,7 @@
+
+ #include <linux/clk.h>
+ #include <linux/libata.h>
++#include <linux/regulator/consumer.h>
+
+ /* Enclosure Management Control */
+ #define EM_CTRL_MSG_TYPE 0x000f0000
+@@ -323,6 +324,7 @@ 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, if not set this gets set to the
+diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
+index 609975d..907c076 100644
+--- a/drivers/ata/ahci_platform.c
++++ b/drivers/ata/ahci_platform.c
+@@ -192,6 +192,14 @@ 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)) {
++ rc = PTR_ERR(hpriv->target_pwr);
++ if (rc == -EPROBE_DEFER)
++ return -EPROBE_DEFER;
++ hpriv->target_pwr = NULL;
++ }
++
+ for (i = 0; i < AHCI_MAX_CLKS; i++) {
+ /*
+ * For now we must use clk_get(dev, NULL) for the first clock,
+@@ -213,9 +221,15 @@ 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,
+@@ -298,6 +312,9 @@ static int ahci_probe(struct platform_device *pdev)
+ 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;
+@@ -314,6 +331,9 @@ 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
+@@ -350,6 +370,9 @@ static int ahci_suspend(struct device *dev)
+
+ ahci_disable_clks(hpriv);
+
++ if (hpriv->target_pwr)
++ regulator_disable(hpriv->target_pwr);
++
+ return 0;
+ }
+
+@@ -360,9 +383,15 @@ 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);
+@@ -384,6 +413,9 @@ 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;
+ }
+--
+2.0.3
+
+From 74f54552b061865ff46d43aa68d0c6e8852dc592 Mon Sep 17 00:00:00 2001
+From: Hans de Goede <hdegoede@redhat.com>
+Date: Mon, 20 Jan 2014 14:54:40 +0100
+Subject: [PATCH] ahci-platform: Add enable_ / disable_resources helper
+ functions
+
+Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+---
+ drivers/ata/ahci_platform.c | 112 ++++++++++++++++++++++++++++--------------
+ include/linux/ahci_platform.h | 2 +
+ 2 files changed, 77 insertions(+), 37 deletions(-)
+
+diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
+index 907c076..6ebbc17 100644
+--- a/drivers/ata/ahci_platform.c
++++ b/drivers/ata/ahci_platform.c
+@@ -139,6 +139,68 @@ void ahci_platform_disable_clks(struct ahci_host_priv *hpriv)
+ }
+ EXPORT_SYMBOL_GPL(ahci_platform_disable_clks);
+
++/**
++ * ahci_platform_enable_resources - Enable platform resources
++ * @hpriv: host private area to store config values
++ *
++ * This function enables all ahci_platform managed resources in
++ * the following order:
++ * 1) Regulator
++ * 2) Clocks (through ahci_platform_enable_clks)
++ *
++ * If resource enabling fails at any point the previous enabled
++ * resources are disabled in reverse order.
++ *
++ * LOCKING:
++ * None.
++ *
++ * RETURNS:
++ * 0 on success otherwise a negative error code
++ */
++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);
++
++/**
++ * ahci_platform_disable_resources - Disable platform resources
++ * @hpriv: host private area to store config values
++ *
++ * This function disables all ahci_platform managed resources in
++ * the following order:
++ * 1) Clocks (through ahci_platform_disable_clks)
++ * 2) Regulator
++ *
++ * LOCKING:
++ * None.
++ */
++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;
+@@ -221,15 +283,9 @@ 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,
+@@ -240,7 +296,7 @@ static int ahci_probe(struct platform_device *pdev)
+ if (pdata && pdata->init) {
+ rc = pdata->init(dev, hpriv->mmio);
+ if (rc)
+- goto disable_unprepare_clk;
++ goto disable_resources;
+ }
+
+ ahci_save_initial_config(dev, hpriv,
+@@ -310,11 +366,8 @@ 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;
+@@ -329,11 +382,8 @@ 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
+@@ -368,10 +418,7 @@ 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;
+ }
+@@ -383,26 +430,20 @@ 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);
+ }
+@@ -411,11 +452,8 @@ 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 769d065..b674b01 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 */
+--
+2.0.3
+
+From 88972833cba7a6dad8e9a1c9b43ab02fc274e4fd Mon Sep 17 00:00:00 2001
+From: Hans de Goede <hdegoede@redhat.com>
+Date: Mon, 20 Jan 2014 14:58:04 +0100
+Subject: [PATCH] ahci-platform: "Library-ise" ahci_probe functionality
+
+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 | 195 ++++++++++++++++++++++++++++--------------
+ include/linux/ahci_platform.h | 14 +++
+ 2 files changed, 144 insertions(+), 65 deletions(-)
+
+diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
+index 6ebbc17..7f3f2ac 100644
+--- a/drivers/ata/ahci_platform.c
++++ b/drivers/ata/ahci_platform.c
+@@ -201,64 +201,64 @@ 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)
++static void ahci_platform_put_resources(struct device *dev, void *res)
+ {
++ struct ahci_host_priv *hpriv = res;
+ 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)
++/**
++ * ahci_platform_get_resources - Get platform resources
++ * @pdev: platform device to get resources for
++ *
++ * This function allocates an ahci_host_priv struct, and gets the
++ * following resources, storing a reference to them inside the returned
++ * struct:
++ *
++ * 1) mmio registers (IORESOURCE_MEM 0, mandatory)
++ * 2) regulator for controlling the targets power (optional)
++ * 3) 0 - AHCI_MAX_CLKS clocks, as specified in the devs devicetree node,
++ * or for non devicetree enabled platforms a single clock
++ *
++ * LOCKING:
++ * None.
++ *
++ * RETURNS:
++ * The allocated ahci_host_priv on success, otherwise an ERR_PTR value
++ */
++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 irq;
+- int n_ports;
+- int i;
+- int rc;
++ int i, rc = -ENOMEM;
+
+- mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+- if (!mem) {
+- dev_err(dev, "no mmio space\n");
+- return -EINVAL;
+- }
++ if (!devres_open_group(dev, NULL, GFP_KERNEL))
++ return ERR_PTR(-ENOMEM);
+
+- irq = platform_get_irq(pdev, 0);
+- if (irq <= 0) {
+- dev_err(dev, "no irq\n");
+- return -EINVAL;
+- }
++ hpriv = devres_alloc(ahci_platform_put_resources, sizeof(*hpriv),
++ GFP_KERNEL);
++ if (!hpriv)
++ goto err_out;
+
+- if (pdata && pdata->ata_port_info)
+- pi = *pdata->ata_port_info;
++ devres_add(dev, hpriv);
+
+- hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
+- if (!hpriv) {
+- dev_err(dev, "can't alloc ahci_host_priv\n");
+- return -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");
++ goto err_out;
+ }
+
+ hpriv->target_pwr = devm_regulator_get_optional(dev, "target");
+ if (IS_ERR(hpriv->target_pwr)) {
+ rc = PTR_ERR(hpriv->target_pwr);
+ if (rc == -EPROBE_DEFER)
+- return -EPROBE_DEFER;
++ goto err_out;
+ hpriv->target_pwr = NULL;
+ }
+
+@@ -277,33 +277,62 @@ static int ahci_probe(struct platform_device *pdev)
+ if (IS_ERR(clk)) {
+ rc = PTR_ERR(clk);
+ if (rc == -EPROBE_DEFER)
+- goto free_clk;
++ goto err_out;
+ break;
+ }
+ hpriv->clks[i] = clk;
+ }
+
+- rc = ahci_platform_enable_resources(hpriv);
+- if (rc)
+- goto free_clk;
++ devres_remove_group(dev, NULL);
++ 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->mmio);
+- if (rc)
+- goto disable_resources;
+- }
++err_out:
++ devres_release_group(dev, NULL);
++ return ERR_PTR(rc);
++}
++EXPORT_SYMBOL_GPL(ahci_platform_get_resources);
++
++/**
++ * ahci_platform_init_host - Bring up an ahci-platform host
++ * @pdev: platform device pointer for the host
++ * @hpriv: ahci-host private data for the host
++ * @pi_template: template for the ata_port_info to use
++ * @force_port_map: param passed to ahci_save_initial_config
++ * @mask_port_map: param passed to ahci_save_initial_config
++ *
++ * This function does all the usual steps needed to bring up an
++ * ahci-platform host, note any necessary resources (ie clks, phy, etc.)
++ * must be initialized / enabled before calling this.
++ *
++ * LOCKING:
++ * None.
++ *
++ * RETURNS:
++ * 0 on success otherwise a negative error code
++ */
++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;
+
+@@ -320,10 +349,8 @@ 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;
+
+@@ -338,7 +365,8 @@ 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 */
+@@ -352,13 +380,53 @@ 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);
++ const struct ata_port_info *pi_template;
++ 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)
++ return rc;
++
++ /*
++ * 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->mmio);
++ if (rc)
++ goto disable_resources;
++ }
++
++ if (pdata && pdata->ata_port_info)
++ pi_template = pdata->ata_port_info;
++ else
++ pi_template = &ahci_port_info[id ? id->driver_data : 0];
++
++ rc = ahci_platform_init_host(pdev, hpriv, pi_template,
++ pdata ? pdata->force_port_map : 0,
++ pdata ? pdata->mask_port_map : 0);
+ if (rc)
+ goto pdata_exit;
+
+@@ -368,8 +436,6 @@ static int ahci_probe(struct platform_device *pdev)
+ pdata->exit(dev);
+ disable_resources:
+ ahci_platform_disable_resources(hpriv);
+-free_clk:
+- ahci_put_clks(hpriv);
+ return rc;
+ }
+
+@@ -383,7 +449,6 @@ static void ahci_host_stop(struct ata_host *host)
+ pdata->exit(dev);
+
+ ahci_platform_disable_resources(hpriv);
+- ahci_put_clks(hpriv);
+ }
+
+ #ifdef CONFIG_PM_SLEEP
+diff --git a/include/linux/ahci_platform.h b/include/linux/ahci_platform.h
+index b674b01..b80c51c 100644
+--- a/include/linux/ahci_platform.h
++++ b/include/linux/ahci_platform.h
+@@ -20,7 +20,14 @@
+ struct device;
+ struct ata_port_info;
+ struct ahci_host_priv;
++struct platform_device;
+
++/*
++ * Note ahci_platform_data is deprecated, it is only kept around for use
++ * by the old da850 and spear13xx ahci code.
++ * New drivers should instead declare their 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, void __iomem *addr);
+ void (*exit)(struct device *dev);
+@@ -35,5 +42,12 @@ 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);
++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 */
+--
+2.0.3
+
+From dffde1e107b4360a4ff6b3aec3693e8b3b4a1bd0 Mon Sep 17 00:00:00 2001
+From: Hans de Goede <hdegoede@redhat.com>
+Date: Mon, 20 Jan 2014 15:52:07 +0100
+Subject: [PATCH] ahci-platform: "Library-ise" suspend / resume functionality
+
+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@redhat.com>
+---
+ drivers/ata/ahci_platform.c | 109 ++++++++++++++++++++++++++++++++++++------
+ include/linux/ahci_platform.h | 5 ++
+ 2 files changed, 99 insertions(+), 15 deletions(-)
+
+diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
+index 7f3f2ac..bdadec1 100644
+--- a/drivers/ata/ahci_platform.c
++++ b/drivers/ata/ahci_platform.c
+@@ -452,14 +452,26 @@ static void ahci_host_stop(struct ata_host *host)
+ }
+
+ #ifdef CONFIG_PM_SLEEP
+-static int ahci_suspend(struct device *dev)
++/**
++ * ahci_platform_suspend_host - Suspend an ahci-platform host
++ * @dev: device pointer for the host
++ *
++ * This function does all the usual steps needed to suspend an
++ * ahci-platform host, note any necessary resources (ie clks, phy, etc.)
++ * must be disabled after calling this.
++ *
++ * LOCKING:
++ * None.
++ *
++ * RETURNS:
++ * 0 on success otherwise a negative error code
++ */
++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");
+@@ -476,7 +488,64 @@ 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);
++
++/**
++ * ahci_platform_resume_host - Resume an ahci-platform host
++ * @dev: device pointer for the host
++ *
++ * This function does all the usual steps needed to resume an
++ * ahci-platform host, note any necessary resources (ie clks, phy, etc.)
++ * must be initialized / enabled before calling this.
++ *
++ * LOCKING:
++ * None.
++ *
++ * RETURNS:
++ * 0 on success otherwise a negative error code
++ */
++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);
++
++/**
++ * ahci_platform_suspend - Suspend an ahci-platform device
++ * @dev: the platform device to suspend
++ *
++ * This function suspends the host associated with the device, followed
++ * by disabling all the resources of the device.
++ *
++ * LOCKING:
++ * None.
++ *
++ * RETURNS:
++ * 0 on success otherwise a negative error code
++ */
++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;
+
+@@ -487,8 +556,22 @@ static int ahci_suspend(struct device *dev)
+
+ return 0;
+ }
++EXPORT_SYMBOL_GPL(ahci_platform_suspend);
+
+-static int ahci_resume(struct device *dev)
++/**
++ * ahci_platform_resume - Resume an ahci-platform device
++ * @dev: the platform device to resume
++ *
++ * This function enables all the resources of the device followed by
++ * resuming the host associated with the device.
++ *
++ * LOCKING:
++ * None.
++ *
++ * RETURNS:
++ * 0 on success otherwise a negative error code
++ */
++int ahci_platform_resume(struct device *dev)
+ {
+ struct ahci_platform_data *pdata = dev_get_platdata(dev);
+ struct ata_host *host = dev_get_drvdata(dev);
+@@ -505,15 +588,9 @@ 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;
+
+@@ -522,9 +599,11 @@ static int ahci_resume(struct device *dev)
+
+ 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 b80c51c..542f268 100644
+--- a/include/linux/ahci_platform.h
++++ b/include/linux/ahci_platform.h
+@@ -50,4 +50,9 @@ int ahci_platform_init_host(struct platform_device *pdev,
+ unsigned int force_port_map,
+ unsigned int mask_port_map);
+
++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 /* _AHCI_PLATFORM_H */
+--
+2.0.3
+
projects / openwrt / openwrt.git / blobdiff