3c1f6e358d
Patches are generated using the "format-patch" command from the following location: *https://www.codeaurora.org/cgit/quic/kernel/galak-msm/log/?h=apq_ipq_base *rev=0771849495b4128cac2faf7d49c85c729fc48b20 Patches numbered 76/77/102/103 have already been integrated in 3.14.12, so they're not in this list. All these patches are either integrated are pending integration into kernel.org, therefore these patches should go away once the kernel gets upgraded to 3.16. Support is currently limited to AP148 board but can be extended to other platforms in the future. These changes do not cover ethernet connectivity. Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org> SVN-Revision: 42334
208 lines
5.4 KiB
Diff
208 lines
5.4 KiB
Diff
From 3b2df84624b38362cb84c2d4c6d1d3540c5069d3 Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Sat, 22 Feb 2014 16:53:33 +0100
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Subject: [PATCH 112/182] ahci-platform: Add enable_ / disable_resources
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helper functions
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tj: Minor comment formatting updates.
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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Signed-off-by: Tejun Heo <tj@kernel.org>
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---
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drivers/ata/ahci_platform.c | 106 +++++++++++++++++++++++++++--------------
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include/linux/ahci_platform.h | 2 +
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2 files changed, 71 insertions(+), 37 deletions(-)
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diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
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index 8f18ebe..656d285 100644
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--- a/drivers/ata/ahci_platform.c
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+++ b/drivers/ata/ahci_platform.c
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@@ -133,6 +133,62 @@ void ahci_platform_disable_clks(struct ahci_host_priv *hpriv)
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}
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EXPORT_SYMBOL_GPL(ahci_platform_disable_clks);
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+/**
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+ * ahci_platform_enable_resources - Enable platform resources
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+ * @hpriv: host private area to store config values
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+ *
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+ * This function enables all ahci_platform managed resources in the
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+ * following order:
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+ * 1) Regulator
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+ * 2) Clocks (through ahci_platform_enable_clks)
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+ *
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+ * If resource enabling fails at any point the previous enabled resources
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+ * are disabled in reverse order.
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+ *
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+ * RETURNS:
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+ * 0 on success otherwise a negative error code
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+ */
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+int ahci_platform_enable_resources(struct ahci_host_priv *hpriv)
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+{
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+ int rc;
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+
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+ if (hpriv->target_pwr) {
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+ rc = regulator_enable(hpriv->target_pwr);
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+ if (rc)
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+ return rc;
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+ }
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+
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+ rc = ahci_platform_enable_clks(hpriv);
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+ if (rc)
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+ goto disable_regulator;
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+
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+ return 0;
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+
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+disable_regulator:
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+ if (hpriv->target_pwr)
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+ regulator_disable(hpriv->target_pwr);
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+ return rc;
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+}
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+EXPORT_SYMBOL_GPL(ahci_platform_enable_resources);
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+
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+/**
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+ * ahci_platform_disable_resources - Disable platform resources
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+ * @hpriv: host private area to store config values
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+ *
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+ * This function disables all ahci_platform managed resources in the
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+ * following order:
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+ * 1) Clocks (through ahci_platform_disable_clks)
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+ * 2) Regulator
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+ */
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+void ahci_platform_disable_resources(struct ahci_host_priv *hpriv)
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+{
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+ ahci_platform_disable_clks(hpriv);
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+
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+ if (hpriv->target_pwr)
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+ regulator_disable(hpriv->target_pwr);
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+}
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+EXPORT_SYMBOL_GPL(ahci_platform_disable_resources);
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+
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static void ahci_put_clks(struct ahci_host_priv *hpriv)
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{
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int c;
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@@ -215,15 +271,9 @@ static int ahci_probe(struct platform_device *pdev)
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hpriv->clks[i] = clk;
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}
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- if (hpriv->target_pwr) {
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- rc = regulator_enable(hpriv->target_pwr);
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- if (rc)
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- goto free_clk;
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- }
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-
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- rc = ahci_enable_clks(dev, hpriv);
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+ rc = ahci_platform_enable_resources(hpriv);
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if (rc)
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- goto disable_regulator;
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+ goto free_clk;
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/*
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* Some platforms might need to prepare for mmio region access,
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@@ -234,7 +284,7 @@ static int ahci_probe(struct platform_device *pdev)
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if (pdata && pdata->init) {
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rc = pdata->init(dev, hpriv->mmio);
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if (rc)
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- goto disable_unprepare_clk;
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+ goto disable_resources;
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}
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ahci_save_initial_config(dev, hpriv,
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@@ -304,11 +354,8 @@ static int ahci_probe(struct platform_device *pdev)
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pdata_exit:
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if (pdata && pdata->exit)
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pdata->exit(dev);
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-disable_unprepare_clk:
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- ahci_disable_clks(hpriv);
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-disable_regulator:
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- if (hpriv->target_pwr)
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- regulator_disable(hpriv->target_pwr);
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+disable_resources:
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+ ahci_platform_disable_resources(hpriv);
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free_clk:
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ahci_put_clks(hpriv);
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return rc;
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@@ -323,11 +370,8 @@ static void ahci_host_stop(struct ata_host *host)
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if (pdata && pdata->exit)
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pdata->exit(dev);
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- ahci_disable_clks(hpriv);
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+ ahci_platform_disable_resources(hpriv);
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ahci_put_clks(hpriv);
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-
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- if (hpriv->target_pwr)
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- regulator_disable(hpriv->target_pwr);
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}
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#ifdef CONFIG_PM_SLEEP
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@@ -362,10 +406,7 @@ static int ahci_suspend(struct device *dev)
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if (pdata && pdata->suspend)
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return pdata->suspend(dev);
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- ahci_disable_clks(hpriv);
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-
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- if (hpriv->target_pwr)
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- regulator_disable(hpriv->target_pwr);
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+ ahci_platform_disable_resources(hpriv);
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return 0;
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}
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@@ -377,26 +418,20 @@ static int ahci_resume(struct device *dev)
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struct ahci_host_priv *hpriv = host->private_data;
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int rc;
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- if (hpriv->target_pwr) {
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- rc = regulator_enable(hpriv->target_pwr);
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- if (rc)
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- return rc;
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- }
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-
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- rc = ahci_enable_clks(dev, hpriv);
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+ rc = ahci_platform_enable_resources(hpriv);
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if (rc)
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- goto disable_regulator;
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+ return rc;
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if (pdata && pdata->resume) {
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rc = pdata->resume(dev);
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if (rc)
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- goto disable_unprepare_clk;
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+ goto disable_resources;
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}
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if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
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rc = ahci_reset_controller(host);
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if (rc)
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- goto disable_unprepare_clk;
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+ goto disable_resources;
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ahci_init_controller(host);
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}
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@@ -405,11 +440,8 @@ static int ahci_resume(struct device *dev)
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return 0;
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-disable_unprepare_clk:
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- ahci_disable_clks(hpriv);
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-disable_regulator:
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- if (hpriv->target_pwr)
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- regulator_disable(hpriv->target_pwr);
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+disable_resources:
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+ ahci_platform_disable_resources(hpriv);
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return rc;
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}
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diff --git a/include/linux/ahci_platform.h b/include/linux/ahci_platform.h
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index 769d065..b674b01 100644
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--- a/include/linux/ahci_platform.h
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+++ b/include/linux/ahci_platform.h
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@@ -33,5 +33,7 @@ struct ahci_platform_data {
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int ahci_platform_enable_clks(struct ahci_host_priv *hpriv);
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void ahci_platform_disable_clks(struct ahci_host_priv *hpriv);
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+int ahci_platform_enable_resources(struct ahci_host_priv *hpriv);
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+void ahci_platform_disable_resources(struct ahci_host_priv *hpriv);
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#endif /* _AHCI_PLATFORM_H */
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--
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1.7.10.4
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