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scsi: ufs: make the UFS variant a platform device
This change turns the UFS variant (SCSI_UFS_QCOM) into a UFS a platform device. In order to do so a few additional changes are required: 1. The ufshcd-pltfrm is no longer serves as a platform device. Now it only serves as a group of platform APIs such as PM APIs (runtime suspend/resume, system suspend/resume etc), parsers of clocks, regulators and pm_levels from DT. 2. What used to be the old platform "probe" is now "only" a pltfrm_init() routine, that does exactly the same, but only being called by the new probe function of the UFS variant. Reviewed-by: Rob Herring <robherring2@gmail.com> Reviewed-by: Gilad Broner <gbroner@codeaurora.org> Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org> Tested-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Yaniv Gardi
Martin K. Petersen
parent
0263bcd0e8
commit
47555a5c8a
58
Documentation/devicetree/bindings/ufs/ufs-qcom.txt
Normal file
58
Documentation/devicetree/bindings/ufs/ufs-qcom.txt
Normal file
@ -0,0 +1,58 @@
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* Qualcomm Technologies Inc Universal Flash Storage (UFS) PHY
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UFSPHY nodes are defined to describe on-chip UFS PHY hardware macro.
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Each UFS PHY node should have its own node.
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To bind UFS PHY with UFS host controller, the controller node should
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contain a phandle reference to UFS PHY node.
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Required properties:
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- compatible : compatible list, contains "qcom,ufs-phy-qmp-20nm"
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or "qcom,ufs-phy-qmp-14nm" according to the relevant phy in use.
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- reg : should contain PHY register address space (mandatory),
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- reg-names : indicates various resources passed to driver (via reg proptery) by name.
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Required "reg-names" is "phy_mem".
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- #phy-cells : This property shall be set to 0
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- vdda-phy-supply : phandle to main PHY supply for analog domain
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- vdda-pll-supply : phandle to PHY PLL and Power-Gen block power supply
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- clocks : List of phandle and clock specifier pairs
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- clock-names : List of clock input name strings sorted in the same
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order as the clocks property. "ref_clk_src", "ref_clk",
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"tx_iface_clk" & "rx_iface_clk" are mandatory but
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"ref_clk_parent" is optional
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Optional properties:
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- vdda-phy-max-microamp : specifies max. load that can be drawn from phy supply
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- vdda-pll-max-microamp : specifies max. load that can be drawn from pll supply
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- vddp-ref-clk-supply : phandle to UFS device ref_clk pad power supply
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- vddp-ref-clk-max-microamp : specifies max. load that can be drawn from this supply
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- vddp-ref-clk-always-on : specifies if this supply needs to be kept always on
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Example:
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ufsphy1: ufsphy@0xfc597000 {
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compatible = "qcom,ufs-phy-qmp-20nm";
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reg = <0xfc597000 0x800>;
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reg-names = "phy_mem";
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#phy-cells = <0>;
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vdda-phy-supply = <&pma8084_l4>;
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vdda-pll-supply = <&pma8084_l12>;
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vdda-phy-max-microamp = <50000>;
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vdda-pll-max-microamp = <1000>;
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clock-names = "ref_clk_src",
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"ref_clk_parent",
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"ref_clk",
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"tx_iface_clk",
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"rx_iface_clk";
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clocks = <&clock_rpm clk_ln_bb_clk>,
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<&clock_gcc clk_pcie_1_phy_ldo >,
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<&clock_gcc clk_ufs_phy_ldo>,
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<&clock_gcc clk_gcc_ufs_tx_cfg_clk>,
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<&clock_gcc clk_gcc_ufs_rx_cfg_clk>;
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};
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ufshc@0xfc598000 {
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...
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phys = <&ufsphy1>;
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phy-names = "ufsphy";
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};
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@ -4,11 +4,18 @@ UFSHC nodes are defined to describe on-chip UFS host controllers.
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Each UFS controller instance should have its own node.
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Required properties:
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- compatible : compatible list, contains "jedec,ufs-1.1"
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- compatible : must contain "jedec,ufs-1.1", may also list one or more
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of the following:
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"qcom,msm8994-ufshc"
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"qcom,msm8996-ufshc"
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"qcom,ufshc"
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- interrupts : <interrupt mapping for UFS host controller IRQ>
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- reg : <registers mapping>
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Optional properties:
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- phys : phandle to UFS PHY node
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- phy-names : the string "ufsphy" when is found in a node, along
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with "phys" attribute, provides phandle to UFS PHY node
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- vdd-hba-supply : phandle to UFS host controller supply regulator node
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- vcc-supply : phandle to VCC supply regulator node
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- vccq-supply : phandle to VCCQ supply regulator node
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@ -54,4 +61,6 @@ Example:
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clocks = <&core 0>, <&ref 0>, <&iface 0>;
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clock-names = "core_clk", "ref_clk", "iface_clk";
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freq-table-hz = <100000000 200000000>, <0 0>, <0 0>;
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phys = <&ufsphy1>;
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phy-names = "ufsphy";
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};
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@ -19,6 +19,7 @@
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#include <linux/phy/phy-qcom-ufs.h>
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#include "ufshcd.h"
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#include "ufshcd-pltfrm.h"
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#include "unipro.h"
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#include "ufs-qcom.h"
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#include "ufshci.h"
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@ -1036,7 +1037,7 @@ void ufs_qcom_clk_scale_notify(struct ufs_hba *hba)
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* The variant operations configure the necessary controller and PHY
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* handshake during initialization.
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*/
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static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = {
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static struct ufs_hba_variant_ops ufs_hba_qcom_vops = {
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.name = "qcom",
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.init = ufs_qcom_init,
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.exit = ufs_qcom_exit,
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@ -1050,4 +1051,63 @@ static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = {
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.resume = ufs_qcom_resume,
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};
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/**
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* ufs_qcom_probe - probe routine of the driver
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* @pdev: pointer to Platform device handle
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*
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* Return zero for success and non-zero for failure
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*/
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static int ufs_qcom_probe(struct platform_device *pdev)
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{
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int err;
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struct device *dev = &pdev->dev;
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/* Perform generic probe */
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err = ufshcd_pltfrm_init(pdev, &ufs_hba_qcom_vops);
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if (err)
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dev_err(dev, "ufshcd_pltfrm_init() failed %d\n", err);
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return err;
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}
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/**
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* ufs_qcom_remove - set driver_data of the device to NULL
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* @pdev: pointer to platform device handle
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*
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* Always return 0
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*/
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static int ufs_qcom_remove(struct platform_device *pdev)
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{
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struct ufs_hba *hba = platform_get_drvdata(pdev);
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pm_runtime_get_sync(&(pdev)->dev);
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ufshcd_remove(hba);
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return 0;
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}
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static const struct of_device_id ufs_qcom_of_match[] = {
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{ .compatible = "qcom,ufshc"},
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{},
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};
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static const struct dev_pm_ops ufs_qcom_pm_ops = {
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.suspend = ufshcd_pltfrm_suspend,
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.resume = ufshcd_pltfrm_resume,
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.runtime_suspend = ufshcd_pltfrm_runtime_suspend,
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.runtime_resume = ufshcd_pltfrm_runtime_resume,
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.runtime_idle = ufshcd_pltfrm_runtime_idle,
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};
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static struct platform_driver ufs_qcom_pltform = {
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.probe = ufs_qcom_probe,
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.remove = ufs_qcom_remove,
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.shutdown = ufshcd_pltfrm_shutdown,
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.driver = {
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.name = "ufshcd-qcom",
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.pm = &ufs_qcom_pm_ops,
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.of_match_table = of_match_ptr(ufs_qcom_of_match),
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},
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};
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module_platform_driver(ufs_qcom_pltform);
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MODULE_LICENSE("GPL v2");
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@ -38,20 +38,7 @@
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#include <linux/of.h>
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#include "ufshcd.h"
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static const struct of_device_id ufs_of_match[];
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static struct ufs_hba_variant_ops *get_variant_ops(struct device *dev)
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{
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if (dev->of_node) {
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const struct of_device_id *match;
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match = of_match_node(ufs_of_match, dev->of_node);
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if (match)
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return (struct ufs_hba_variant_ops *)match->data;
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}
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return NULL;
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}
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#include "ufshcd-pltfrm.h"
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static int ufshcd_parse_clock_info(struct ufs_hba *hba)
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{
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@ -245,10 +232,11 @@ out:
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* Returns 0 if successful
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* Returns non-zero otherwise
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*/
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static int ufshcd_pltfrm_suspend(struct device *dev)
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int ufshcd_pltfrm_suspend(struct device *dev)
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{
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return ufshcd_system_suspend(dev_get_drvdata(dev));
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}
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_suspend);
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/**
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* ufshcd_pltfrm_resume - resume power management function
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@ -257,43 +245,47 @@ static int ufshcd_pltfrm_suspend(struct device *dev)
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* Returns 0 if successful
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* Returns non-zero otherwise
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*/
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static int ufshcd_pltfrm_resume(struct device *dev)
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int ufshcd_pltfrm_resume(struct device *dev)
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{
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return ufshcd_system_resume(dev_get_drvdata(dev));
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}
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_resume);
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static int ufshcd_pltfrm_runtime_suspend(struct device *dev)
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int ufshcd_pltfrm_runtime_suspend(struct device *dev)
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{
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return ufshcd_runtime_suspend(dev_get_drvdata(dev));
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}
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static int ufshcd_pltfrm_runtime_resume(struct device *dev)
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_runtime_suspend);
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int ufshcd_pltfrm_runtime_resume(struct device *dev)
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{
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return ufshcd_runtime_resume(dev_get_drvdata(dev));
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}
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static int ufshcd_pltfrm_runtime_idle(struct device *dev)
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_runtime_resume);
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int ufshcd_pltfrm_runtime_idle(struct device *dev)
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{
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return ufshcd_runtime_idle(dev_get_drvdata(dev));
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}
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#else /* !CONFIG_PM */
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#define ufshcd_pltfrm_suspend NULL
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#define ufshcd_pltfrm_resume NULL
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#define ufshcd_pltfrm_runtime_suspend NULL
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#define ufshcd_pltfrm_runtime_resume NULL
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#define ufshcd_pltfrm_runtime_idle NULL
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_runtime_idle);
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#endif /* CONFIG_PM */
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static void ufshcd_pltfrm_shutdown(struct platform_device *pdev)
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void ufshcd_pltfrm_shutdown(struct platform_device *pdev)
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{
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ufshcd_shutdown((struct ufs_hba *)platform_get_drvdata(pdev));
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}
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_shutdown);
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/**
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* ufshcd_pltfrm_probe - probe routine of the driver
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* ufshcd_pltfrm_init - probe routine of the driver
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* @pdev: pointer to Platform device handle
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* @vops: pointer to variant ops
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*
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* Returns 0 on success, non-zero value on failure
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*/
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static int ufshcd_pltfrm_probe(struct platform_device *pdev)
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int ufshcd_pltfrm_init(struct platform_device *pdev,
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struct ufs_hba_variant_ops *vops)
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{
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struct ufs_hba *hba;
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void __iomem *mmio_base;
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@ -321,19 +313,19 @@ static int ufshcd_pltfrm_probe(struct platform_device *pdev)
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goto out;
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}
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hba->vops = get_variant_ops(&pdev->dev);
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hba->vops = vops;
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err = ufshcd_parse_clock_info(hba);
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if (err) {
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dev_err(&pdev->dev, "%s: clock parse failed %d\n",
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__func__, err);
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goto out;
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goto dealloc_host;
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}
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err = ufshcd_parse_regulator_info(hba);
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if (err) {
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dev_err(&pdev->dev, "%s: regulator init failed %d\n",
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__func__, err);
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goto out;
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goto dealloc_host;
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}
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pm_runtime_set_active(&pdev->dev);
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@ -352,50 +344,12 @@ static int ufshcd_pltfrm_probe(struct platform_device *pdev)
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out_disable_rpm:
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pm_runtime_disable(&pdev->dev);
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pm_runtime_set_suspended(&pdev->dev);
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dealloc_host:
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ufshcd_dealloc_host(hba);
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out:
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return err;
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}
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/**
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* ufshcd_pltfrm_remove - remove platform driver routine
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* @pdev: pointer to platform device handle
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*
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* Returns 0 on success, non-zero value on failure
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*/
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static int ufshcd_pltfrm_remove(struct platform_device *pdev)
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{
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struct ufs_hba *hba = platform_get_drvdata(pdev);
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pm_runtime_get_sync(&(pdev)->dev);
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ufshcd_remove(hba);
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return 0;
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}
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static const struct of_device_id ufs_of_match[] = {
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{ .compatible = "jedec,ufs-1.1"},
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{},
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};
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static const struct dev_pm_ops ufshcd_dev_pm_ops = {
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.suspend = ufshcd_pltfrm_suspend,
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.resume = ufshcd_pltfrm_resume,
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.runtime_suspend = ufshcd_pltfrm_runtime_suspend,
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.runtime_resume = ufshcd_pltfrm_runtime_resume,
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.runtime_idle = ufshcd_pltfrm_runtime_idle,
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};
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static struct platform_driver ufshcd_pltfrm_driver = {
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.probe = ufshcd_pltfrm_probe,
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.remove = ufshcd_pltfrm_remove,
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.shutdown = ufshcd_pltfrm_shutdown,
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.driver = {
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.name = "ufshcd",
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.pm = &ufshcd_dev_pm_ops,
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.of_match_table = ufs_of_match,
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},
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};
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module_platform_driver(ufshcd_pltfrm_driver);
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_init);
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MODULE_AUTHOR("Santosh Yaragnavi <santosh.sy@samsung.com>");
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MODULE_AUTHOR("Vinayak Holikatti <h.vinayak@samsung.com>");
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41
drivers/scsi/ufs/ufshcd-pltfrm.h
Normal file
41
drivers/scsi/ufs/ufshcd-pltfrm.h
Normal file
@ -0,0 +1,41 @@
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/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
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* GNU General Public License for more details.
|
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*
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*/
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#ifndef UFSHCD_PLTFRM_H_
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#define UFSHCD_PLTFRM_H_
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#include "ufshcd.h"
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int ufshcd_pltfrm_init(struct platform_device *pdev,
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struct ufs_hba_variant_ops *vops);
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void ufshcd_pltfrm_shutdown(struct platform_device *pdev);
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#ifdef CONFIG_PM
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int ufshcd_pltfrm_suspend(struct device *dev);
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int ufshcd_pltfrm_resume(struct device *dev);
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int ufshcd_pltfrm_runtime_suspend(struct device *dev);
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int ufshcd_pltfrm_runtime_resume(struct device *dev);
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int ufshcd_pltfrm_runtime_idle(struct device *dev);
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#else /* !CONFIG_PM */
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#define ufshcd_pltfrm_suspend NULL
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#define ufshcd_pltfrm_resume NULL
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#define ufshcd_pltfrm_runtime_suspend NULL
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#define ufshcd_pltfrm_runtime_resume NULL
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#define ufshcd_pltfrm_runtime_idle NULL
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#endif /* CONFIG_PM */
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#endif /* UFSHCD_PLTFRM_H_ */
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@ -5347,6 +5347,16 @@ void ufshcd_remove(struct ufs_hba *hba)
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}
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EXPORT_SYMBOL_GPL(ufshcd_remove);
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/**
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* ufshcd_dealloc_host - deallocate Host Bus Adapter (HBA)
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* @hba: pointer to Host Bus Adapter (HBA)
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*/
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void ufshcd_dealloc_host(struct ufs_hba *hba)
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{
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scsi_host_put(hba->host);
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}
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EXPORT_SYMBOL_GPL(ufshcd_dealloc_host);
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/**
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* ufshcd_set_dma_mask - Set dma mask based on the controller
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* addressing capability
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@ -576,6 +576,7 @@ static inline void ufshcd_rmwl(struct ufs_hba *hba, u32 mask, u32 val, u32 reg)
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}
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int ufshcd_alloc_host(struct device *, struct ufs_hba **);
|
||||
void ufshcd_dealloc_host(struct ufs_hba *);
|
||||
int ufshcd_init(struct ufs_hba * , void __iomem * , unsigned int);
|
||||
void ufshcd_remove(struct ufs_hba *);
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user