[PATCH 5/6] usb: xhci-mtk: use clock bulk to get clocks

[Chunfeng Yun]

Use clock bulk helpers to get/enable/disable clocks, meanwhile
make sys_ck optional, then will be easier to handle clocks.

Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>
---
 drivers/usb/host/xhci-mtk.c | 109 +++++++-----------------------------
 drivers/usb/host/xhci-mtk.h |  10 ++--
 2 files changed, 24 insertions(+), 95 deletions(-)

diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index 30927f4064d4..d4c455eecb8d 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -7,7 +7,6 @@
  *  Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>
  */
 
-#include <linux/clk.h>
 #include <linux/dma-mapping.h>
 #include <linux/iopoll.h>
 #include <linux/kernel.h>
@@ -220,89 +219,6 @@ static int xhci_mtk_ssusb_config(struct xhci_hcd_mtk *mtk)
 	return xhci_mtk_host_enable(mtk);
 }
 
-static int xhci_mtk_clks_get(struct xhci_hcd_mtk *mtk)
-{
-	struct device *dev = mtk->dev;
-
-	mtk->sys_clk = devm_clk_get(dev, "sys_ck");
-	if (IS_ERR(mtk->sys_clk)) {
-		dev_err(dev, "fail to get sys_ck\n");
-		return PTR_ERR(mtk->sys_clk);
-	}
-
-	mtk->xhci_clk = devm_clk_get_optional(dev, "xhci_ck");
-	if (IS_ERR(mtk->xhci_clk))
-		return PTR_ERR(mtk->xhci_clk);
-
-	mtk->ref_clk = devm_clk_get_optional(dev, "ref_ck");
-	if (IS_ERR(mtk->ref_clk))
-		return PTR_ERR(mtk->ref_clk);
-
-	mtk->mcu_clk = devm_clk_get_optional(dev, "mcu_ck");
-	if (IS_ERR(mtk->mcu_clk))
-		return PTR_ERR(mtk->mcu_clk);
-
-	mtk->dma_clk = devm_clk_get_optional(dev, "dma_ck");
-	return PTR_ERR_OR_ZERO(mtk->dma_clk);
-}
-
-static int xhci_mtk_clks_enable(struct xhci_hcd_mtk *mtk)
-{
-	int ret;
-
-	ret = clk_prepare_enable(mtk->ref_clk);
-	if (ret) {
-		dev_err(mtk->dev, "failed to enable ref_clk\n");
-		goto ref_clk_err;
-	}
-
-	ret = clk_prepare_enable(mtk->sys_clk);
-	if (ret) {
-		dev_err(mtk->dev, "failed to enable sys_clk\n");
-		goto sys_clk_err;
-	}
-
-	ret = clk_prepare_enable(mtk->xhci_clk);
-	if (ret) {
-		dev_err(mtk->dev, "failed to enable xhci_clk\n");
-		goto xhci_clk_err;
-	}
-
-	ret = clk_prepare_enable(mtk->mcu_clk);
-	if (ret) {
-		dev_err(mtk->dev, "failed to enable mcu_clk\n");
-		goto mcu_clk_err;
-	}
-
-	ret = clk_prepare_enable(mtk->dma_clk);
-	if (ret) {
-		dev_err(mtk->dev, "failed to enable dma_clk\n");
-		goto dma_clk_err;
-	}
-
-	return 0;
-
-dma_clk_err:
-	clk_disable_unprepare(mtk->mcu_clk);
-mcu_clk_err:
-	clk_disable_unprepare(mtk->xhci_clk);
-xhci_clk_err:
-	clk_disable_unprepare(mtk->sys_clk);
-sys_clk_err:
-	clk_disable_unprepare(mtk->ref_clk);
-ref_clk_err:
-	return ret;
-}
-
-static void xhci_mtk_clks_disable(struct xhci_hcd_mtk *mtk)
-{
-	clk_disable_unprepare(mtk->dma_clk);
-	clk_disable_unprepare(mtk->mcu_clk);
-	clk_disable_unprepare(mtk->xhci_clk);
-	clk_disable_unprepare(mtk->sys_clk);
-	clk_disable_unprepare(mtk->ref_clk);
-}
-
 /* only clocks can be turn off for ip-sleep wakeup mode */
 static void usb_wakeup_ip_sleep_set(struct xhci_hcd_mtk *mtk, bool enable)
 {
@@ -367,6 +283,19 @@ static void usb_wakeup_set(struct xhci_hcd_mtk *mtk, bool enable)
 		usb_wakeup_ip_sleep_set(mtk, enable);
 }
 
+static int xhci_mtk_clks_get(struct xhci_hcd_mtk *mtk)
+{
+	struct clk_bulk_data *clks = mtk->clks;
+
+	clks[0].id = "sys_ck";
+	clks[1].id = "xhci_ck";
+	clks[2].id = "ref_ck";
+	clks[3].id = "mcu_ck";
+	clks[4].id = "dma_ck";
+
+	return devm_clk_bulk_get_optional(mtk->dev, BULK_CLKS_NUM, clks);
+}
+
 static int xhci_mtk_ldos_enable(struct xhci_hcd_mtk *mtk)
 {
 	int ret;
@@ -522,7 +451,7 @@ static int xhci_mtk_probe(struct platform_device *pdev)
 	if (ret)
 		goto disable_pm;
 
-	ret = xhci_mtk_clks_enable(mtk);
+	ret = clk_bulk_prepare_enable(BULK_CLKS_NUM, mtk->clks);
 	if (ret)
 		goto disable_ldos;
 
@@ -625,7 +554,7 @@ static int xhci_mtk_probe(struct platform_device *pdev)
 	usb_put_hcd(hcd);
 
 disable_clk:
-	xhci_mtk_clks_disable(mtk);
+	clk_bulk_disable_unprepare(BULK_CLKS_NUM, mtk->clks);
 
 disable_ldos:
 	xhci_mtk_ldos_disable(mtk);
@@ -655,7 +584,7 @@ static int xhci_mtk_remove(struct platform_device *pdev)
 	usb_put_hcd(shared_hcd);
 	usb_put_hcd(hcd);
 	xhci_mtk_sch_exit(mtk);
-	xhci_mtk_clks_disable(mtk);
+	clk_bulk_disable_unprepare(BULK_CLKS_NUM, mtk->clks);
 	xhci_mtk_ldos_disable(mtk);
 
 	pm_runtime_disable(dev);
@@ -682,7 +611,7 @@ static int __maybe_unused xhci_mtk_suspend(struct device *dev)
 	if (ret)
 		goto restart_poll_rh;
 
-	xhci_mtk_clks_disable(mtk);
+	clk_bulk_disable_unprepare(BULK_CLKS_NUM, mtk->clks);
 	usb_wakeup_set(mtk, true);
 	return 0;
 
@@ -703,7 +632,7 @@ static int __maybe_unused xhci_mtk_resume(struct device *dev)
 	int ret;
 
 	usb_wakeup_set(mtk, false);
-	ret = xhci_mtk_clks_enable(mtk);
+	ret = clk_bulk_prepare_enable(BULK_CLKS_NUM, mtk->clks);
 	if (ret)
 		goto enable_wakeup;
 
@@ -719,7 +648,7 @@ static int __maybe_unused xhci_mtk_resume(struct device *dev)
 	return 0;
 
 disable_clks:
-	xhci_mtk_clks_disable(mtk);
+	clk_bulk_disable_unprepare(BULK_CLKS_NUM, mtk->clks);
 enable_wakeup:
 	usb_wakeup_set(mtk, true);
 	return ret;
diff --git a/drivers/usb/host/xhci-mtk.h b/drivers/usb/host/xhci-mtk.h
index 621ec1a85009..11996edc1967 100644
--- a/drivers/usb/host/xhci-mtk.h
+++ b/drivers/usb/host/xhci-mtk.h
@@ -9,8 +9,12 @@
 #ifndef _XHCI_MTK_H_
 #define _XHCI_MTK_H_
 
+#include <linux/clk.h>
+
 #include "xhci.h"
 
+#define BULK_CLKS_NUM	5
+
 /**
  * To simplify scheduler algorithm, set a upper limit for ESIT,
  * if a synchromous ep's ESIT is larger than @XHCI_MTK_MAX_ESIT,
@@ -140,11 +144,7 @@ struct xhci_hcd_mtk {
 	int u3p_dis_msk;
 	struct regulator *vusb33;
 	struct regulator *vbus;
-	struct clk *sys_clk;	/* sys and mac clock */
-	struct clk *xhci_clk;
-	struct clk *ref_clk;
-	struct clk *mcu_clk;
-	struct clk *dma_clk;
+	struct clk_bulk_data clks[BULK_CLKS_NUM];
 	struct regmap *pericfg;
 	struct phy **phys;
 	int num_phys;
-- 
2.18.0