diff options
Diffstat (limited to 'target/linux/ipq806x/patches/0111-ahci-platform-Add-support-for-an-optional-regulator-.patch')
| -rw-r--r-- | target/linux/ipq806x/patches/0111-ahci-platform-Add-support-for-an-optional-regulator-.patch | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches/0111-ahci-platform-Add-support-for-an-optional-regulator-.patch b/target/linux/ipq806x/patches/0111-ahci-platform-Add-support-for-an-optional-regulator-.patch new file mode 100644 index 0000000000..2d6ac0bd98 --- /dev/null +++ b/target/linux/ipq806x/patches/0111-ahci-platform-Add-support-for-an-optional-regulator-.patch @@ -0,0 +1,142 @@ +From 967f4a7821a3356d9d3c8b641537cd6d5eb15439 Mon Sep 17 00:00:00 2001 +From: Hans de Goede <hdegoede@redhat.com> +Date: Sat, 22 Feb 2014 16:53:32 +0100 +Subject: [PATCH 111/182] ahci-platform: Add support for an optional regulator + for sata-target power + +Signed-off-by: Hans de Goede <hdegoede@redhat.com> +Signed-off-by: Tejun Heo <tj@kernel.org> +--- + .../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 2342a42..8f18ebe 100644 +--- a/drivers/ata/ahci_platform.c ++++ b/drivers/ata/ahci_platform.c +@@ -186,6 +186,14 @@ 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, +@@ -207,9 +215,15 @@ 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, +@@ -292,6 +306,9 @@ 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; +@@ -308,6 +325,9 @@ 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 +@@ -344,6 +364,9 @@ static int ahci_suspend(struct device *dev) + + ahci_disable_clks(hpriv); + ++ if (hpriv->target_pwr) ++ regulator_disable(hpriv->target_pwr); ++ + return 0; + } + +@@ -354,9 +377,15 @@ 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); +@@ -378,6 +407,9 @@ 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; + } +-- +1.7.10.4 + |