diff options
Diffstat (limited to 'target/linux/ipq806x/patches/0110-ahci-platform-Add-support-for-devices-with-more-then.patch')
-rw-r--r-- | target/linux/ipq806x/patches/0110-ahci-platform-Add-support-for-devices-with-more-then.patch | 242 |
1 files changed, 0 insertions, 242 deletions
diff --git a/target/linux/ipq806x/patches/0110-ahci-platform-Add-support-for-devices-with-more-then.patch b/target/linux/ipq806x/patches/0110-ahci-platform-Add-support-for-devices-with-more-then.patch deleted file mode 100644 index 54f84ee..0000000 --- a/target/linux/ipq806x/patches/0110-ahci-platform-Add-support-for-devices-with-more-then.patch +++ /dev/null @@ -1,242 +0,0 @@ -From b7ad421c184b827806c7f65be3a980cfc855b589 Mon Sep 17 00:00:00 2001 -From: Hans de Goede <hdegoede@redhat.com> -Date: Sat, 22 Feb 2014 16:53:31 +0100 -Subject: [PATCH 110/182] 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. - -tj: Minor comment formatting updates. - -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 | 3 +- - drivers/ata/ahci_platform.c | 113 +++++++++++++++----- - include/linux/ahci_platform.h | 4 + - 4 files changed, 93 insertions(+), 28 deletions(-) - ---- 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 { ---- 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, -@@ -322,7 +323,7 @@ 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 ---- a/drivers/ata/ahci_platform.c -+++ b/drivers/ata/ahci_platform.c -@@ -87,6 +87,60 @@ static struct scsi_host_template ahci_pl - 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. -+ * -+ * 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). -+ */ -+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 +151,7 @@ static int ahci_probe(struct platform_de - struct ahci_host_priv *hpriv; - struct ata_host *host; - struct resource *mem; -+ struct clk *clk; - int irq; - int n_ports; - int i; -@@ -131,17 +186,31 @@ static int ahci_probe(struct platform_de - 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 +291,9 @@ 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 +306,8 @@ static void ahci_host_stop(struct ata_ho - 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 +342,7 @@ static int ahci_suspend(struct device *d - 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 +354,9 @@ static int ahci_resume(struct device *de - 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 +377,7 @@ static int ahci_resume(struct device *de - return 0; - - disable_unprepare_clk: -- if (!IS_ERR(hpriv->clk)) -- clk_disable_unprepare(hpriv->clk); -+ ahci_disable_clks(hpriv); - - return rc; - } ---- 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 */ |