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Message-ID: <1623139069-8173-24-git-send-email-chunfeng.yun@mediatek.com>
Date: Tue, 8 Jun 2021 15:57:49 +0800
From: Chunfeng Yun <chunfeng.yun@...iatek.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Rob Herring <robh+dt@...nel.org>,
Felipe Balbi <balbi@...nel.org>
CC: Chunfeng Yun <chunfeng.yun@...iatek.com>,
Matthias Brugger <matthias.bgg@...il.com>,
Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
<linux-usb@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, Yuwen Ng <yuwen.ng@...iatek.com>,
Eddie Hung <eddie.hung@...iatek.com>
Subject: [PATCH 23/23] usb: mtu3: use clock bulk to get clocks
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@...iatek.com>
---
drivers/usb/mtu3/mtu3.h | 12 ++---
drivers/usb/mtu3/mtu3_plat.c | 86 ++++++------------------------------
2 files changed, 18 insertions(+), 80 deletions(-)
diff --git a/drivers/usb/mtu3/mtu3.h b/drivers/usb/mtu3/mtu3.h
index ad063fec7f17..022bbdc54e68 100644
--- a/drivers/usb/mtu3/mtu3.h
+++ b/drivers/usb/mtu3/mtu3.h
@@ -10,6 +10,7 @@
#ifndef __MTU3_H__
#define __MTU3_H__
+#include <linux/clk.h>
#include <linux/device.h>
#include <linux/dmapool.h>
#include <linux/extcon.h>
@@ -89,6 +90,8 @@ struct mtu3_request;
*/
#define EP0_RESPONSE_BUF 6
+#define BULK_CLKS_CNT 4
+
/* device operated link and speed got from DEVICE_CONF register */
enum mtu3_speed {
MTU3_SPEED_INACTIVE = 0,
@@ -221,10 +224,6 @@ struct otg_switch_mtk {
* @mac_base: register base address of device MAC, exclude xHCI's
* @ippc_base: register base address of IP Power and Clock interface (IPPC)
* @vusb33: usb3.3V shared by device/host IP
- * @sys_clk: system clock of mtu3, shared by device/host IP
- * @ref_clk: reference clock
- * @mcu_clk: mcu_bus_ck clock for AHB bus etc
- * @dma_clk: dma_bus_ck clock for AXI bus etc
* @dr_mode: works in which mode:
* host only, device only or dual-role mode
* @u2_ports: number of usb2.0 host ports
@@ -250,10 +249,7 @@ struct ssusb_mtk {
int wakeup_irq;
/* common power & clock */
struct regulator *vusb33;
- struct clk *sys_clk;
- struct clk *ref_clk;
- struct clk *mcu_clk;
- struct clk *dma_clk;
+ struct clk_bulk_data clks[BULK_CLKS_CNT];
/* otg */
struct otg_switch_mtk otg_switch;
enum usb_dr_mode dr_mode;
diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c
index 0beae0c8e2d6..57a71af8e151 100644
--- a/drivers/usb/mtu3/mtu3_plat.c
+++ b/drivers/usb/mtu3/mtu3_plat.c
@@ -5,7 +5,6 @@
* Author: Chunfeng Yun <chunfeng.yun@...iatek.com>
*/
-#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
@@ -125,54 +124,6 @@ static void ssusb_phy_power_off(struct ssusb_mtk *ssusb)
phy_power_off(ssusb->phys[i]);
}
-static int ssusb_clks_enable(struct ssusb_mtk *ssusb)
-{
- int ret;
-
- ret = clk_prepare_enable(ssusb->sys_clk);
- if (ret) {
- dev_err(ssusb->dev, "failed to enable sys_clk\n");
- goto sys_clk_err;
- }
-
- ret = clk_prepare_enable(ssusb->ref_clk);
- if (ret) {
- dev_err(ssusb->dev, "failed to enable ref_clk\n");
- goto ref_clk_err;
- }
-
- ret = clk_prepare_enable(ssusb->mcu_clk);
- if (ret) {
- dev_err(ssusb->dev, "failed to enable mcu_clk\n");
- goto mcu_clk_err;
- }
-
- ret = clk_prepare_enable(ssusb->dma_clk);
- if (ret) {
- dev_err(ssusb->dev, "failed to enable dma_clk\n");
- goto dma_clk_err;
- }
-
- return 0;
-
-dma_clk_err:
- clk_disable_unprepare(ssusb->mcu_clk);
-mcu_clk_err:
- clk_disable_unprepare(ssusb->ref_clk);
-ref_clk_err:
- clk_disable_unprepare(ssusb->sys_clk);
-sys_clk_err:
- return ret;
-}
-
-static void ssusb_clks_disable(struct ssusb_mtk *ssusb)
-{
- clk_disable_unprepare(ssusb->dma_clk);
- clk_disable_unprepare(ssusb->mcu_clk);
- clk_disable_unprepare(ssusb->ref_clk);
- clk_disable_unprepare(ssusb->sys_clk);
-}
-
static int ssusb_rscs_init(struct ssusb_mtk *ssusb)
{
int ret = 0;
@@ -183,7 +134,7 @@ static int ssusb_rscs_init(struct ssusb_mtk *ssusb)
goto vusb33_err;
}
- ret = ssusb_clks_enable(ssusb);
+ ret = clk_bulk_prepare_enable(BULK_CLKS_CNT, ssusb->clks);
if (ret)
goto clks_err;
@@ -204,7 +155,7 @@ static int ssusb_rscs_init(struct ssusb_mtk *ssusb)
phy_err:
ssusb_phy_exit(ssusb);
phy_init_err:
- ssusb_clks_disable(ssusb);
+ clk_bulk_disable_unprepare(BULK_CLKS_CNT, ssusb->clks);
clks_err:
regulator_disable(ssusb->vusb33);
vusb33_err:
@@ -213,7 +164,7 @@ static int ssusb_rscs_init(struct ssusb_mtk *ssusb)
static void ssusb_rscs_exit(struct ssusb_mtk *ssusb)
{
- ssusb_clks_disable(ssusb);
+ clk_bulk_disable_unprepare(BULK_CLKS_CNT, ssusb->clks);
regulator_disable(ssusb->vusb33);
ssusb_phy_power_off(ssusb);
ssusb_phy_exit(ssusb);
@@ -239,6 +190,7 @@ static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
{
struct device_node *node = pdev->dev.of_node;
struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
+ struct clk_bulk_data *clks = ssusb->clks;
struct device *dev = &pdev->dev;
int i;
int ret;
@@ -249,23 +201,13 @@ static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
return PTR_ERR(ssusb->vusb33);
}
- ssusb->sys_clk = devm_clk_get(dev, "sys_ck");
- if (IS_ERR(ssusb->sys_clk)) {
- dev_err(dev, "failed to get sys clock\n");
- return PTR_ERR(ssusb->sys_clk);
- }
-
- ssusb->ref_clk = devm_clk_get_optional(dev, "ref_ck");
- if (IS_ERR(ssusb->ref_clk))
- return PTR_ERR(ssusb->ref_clk);
-
- ssusb->mcu_clk = devm_clk_get_optional(dev, "mcu_ck");
- if (IS_ERR(ssusb->mcu_clk))
- return PTR_ERR(ssusb->mcu_clk);
-
- ssusb->dma_clk = devm_clk_get_optional(dev, "dma_ck");
- if (IS_ERR(ssusb->dma_clk))
- return PTR_ERR(ssusb->dma_clk);
+ clks[0].id = "sys_ck";
+ clks[1].id = "ref_ck";
+ clks[2].id = "mcu_ck";
+ clks[3].id = "dma_ck";
+ ret = devm_clk_bulk_get_optional(dev, BULK_CLKS_CNT, clks);
+ if (ret)
+ return ret;
ssusb->num_phys = of_count_phandle_with_args(node,
"phys", "#phy-cells");
@@ -558,7 +500,7 @@ static int mtu3_suspend_common(struct device *dev, pm_message_t msg)
goto sleep_err;
ssusb_phy_power_off(ssusb);
- ssusb_clks_disable(ssusb);
+ clk_bulk_disable_unprepare(BULK_CLKS_CNT, ssusb->clks);
ssusb_wakeup_set(ssusb, true);
sleep_err:
@@ -575,7 +517,7 @@ static int mtu3_resume_common(struct device *dev, pm_message_t msg)
dev_dbg(dev, "%s\n", __func__);
ssusb_wakeup_set(ssusb, false);
- ret = ssusb_clks_enable(ssusb);
+ ret = clk_bulk_prepare_enable(BULK_CLKS_CNT, ssusb->clks);
if (ret)
goto clks_err;
@@ -586,7 +528,7 @@ static int mtu3_resume_common(struct device *dev, pm_message_t msg)
return resume_ip_and_ports(ssusb, msg);
phy_err:
- ssusb_clks_disable(ssusb);
+ clk_bulk_disable_unprepare(BULK_CLKS_CNT, ssusb->clks);
clks_err:
return ret;
}
--
2.18.0
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