[PATCH v5,2/2] clk: reset: Modify reset-controller driver

[Yong Liang <yong.liang@mediatek.com>]

From: "yong.liang" <yong.liang@mediatek.com>

Set reset signal by a register and
clear reset signal by another register for 8183.

Signed-off-by: yong.liang <yong.liang@mediatek.com>
---

Base on kernel 5.3

Changes in patch v5:
1. Add a comment for 0x120 in mtk_register_reset_controller_set_clr()
2. Optimize code format

Changes in patch v4:
1. Optimize code logic of clk_mt8183_infra_probe() in clk-mt8183.c
2. Optimize code format

Changes in patch v3:
Call mtk_register_reset_controller_set_clr function in clk_mt8183_infra_probe instead of clk_mt8183_apmixed_probe

Changes in patch v2:
Rollback modify for "_tuner_en_bit, _pcw_reg, _pcw_shift,"
in drivers/clk/mediatek/clk-mt8183.c

---
 drivers/clk/mediatek/clk-mt8183.c             | 16 +++-
 drivers/clk/mediatek/clk-mtk.h                |  3 +
 drivers/clk/mediatek/reset.c                  | 56 ++++++++++++-
 .../reset-controller/mt8183-resets.h          | 81 +++++++++++++++++++
 4 files changed, 152 insertions(+), 4 deletions(-)
 create mode 100644 include/dt-bindings/reset-controller/mt8183-resets.h

diff --git a/drivers/clk/mediatek/clk-mt8183.c b/drivers/clk/mediatek/clk-mt8183.c
index 1aa5f4059251..3f1428ed619b 100644
--- a/drivers/clk/mediatek/clk-mt8183.c
+++ b/drivers/clk/mediatek/clk-mt8183.c
@@ -17,6 +17,9 @@
 
 #include <dt-bindings/clock/mt8183-clk.h>
 
+/* Infra global controller reset set register */
+#define INFRA_RST0_SET_OFFSET		0x120
+
 static DEFINE_SPINLOCK(mt8183_clk_lock);
 
 static const struct mtk_fixed_clk top_fixed_clks[] = {
@@ -1185,13 +1188,24 @@ static int clk_mt8183_infra_probe(struct platform_device *pdev)
 {
 	struct clk_onecell_data *clk_data;
 	struct device_node *node = pdev->dev.of_node;
+	int r;
 
 	clk_data = mtk_alloc_clk_data(CLK_INFRA_NR_CLK);
 
 	mtk_clk_register_gates(node, infra_clks, ARRAY_SIZE(infra_clks),
 		clk_data);
 
-	return of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
+	r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
+	if (r) {
+		dev_err(&pdev->dev,
+			"%s(): could not register clock provider: %d\n"
+			,__func__, r);
+		return r;
+	}
+
+	mtk_register_reset_controller_set_clr(node, 4, INFRA_RST0_SET_OFFSET);
+
+	return r;
 }
 
 static int clk_mt8183_mcu_probe(struct platform_device *pdev)
diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h
index 733a11d1de94..2e9e26084798 100644
--- a/drivers/clk/mediatek/clk-mtk.h
+++ b/drivers/clk/mediatek/clk-mtk.h
@@ -240,4 +240,7 @@ struct clk *mtk_clk_register_ref2usb_tx(const char *name,
 void mtk_register_reset_controller(struct device_node *np,
 			unsigned int num_regs, int regofs);
 
+void mtk_register_reset_controller_set_clr(struct device_node *np,
+	unsigned int num_regs, int regofs);
+
 #endif /* __DRV_CLK_MTK_H */
diff --git a/drivers/clk/mediatek/reset.c b/drivers/clk/mediatek/reset.c
index d8376b92349e..17df8f8b57ea 100644
--- a/drivers/clk/mediatek/reset.c
+++ b/drivers/clk/mediatek/reset.c
@@ -19,6 +19,24 @@ struct mtk_reset {
 	struct reset_controller_dev rcdev;
 };
 
+static int mtk_reset_assert_set_clr(struct reset_controller_dev *rcdev,
+	unsigned long id)
+{
+	struct mtk_reset *data = container_of(rcdev, struct mtk_reset, rcdev);
+	unsigned int reg = data->regofs + ((id / 32) << 4);
+
+	return regmap_write(data->regmap, reg, 1);
+}
+
+static int mtk_reset_deassert_set_clr(struct reset_controller_dev *rcdev,
+	unsigned long id)
+{
+	struct mtk_reset *data = container_of(rcdev, struct mtk_reset, rcdev);
+	unsigned int reg = data->regofs + ((id / 32) << 4) + 0x4;
+
+	return regmap_write(data->regmap, reg, 1);
+}
+
 static int mtk_reset_assert(struct reset_controller_dev *rcdev,
 			      unsigned long id)
 {
@@ -49,14 +67,32 @@ static int mtk_reset(struct reset_controller_dev *rcdev,
 	return mtk_reset_deassert(rcdev, id);
 }
 
+static int mtk_reset_set_clr(struct reset_controller_dev *rcdev,
+	unsigned long id)
+{
+	int ret;
+
+	ret = mtk_reset_assert_set_clr(rcdev, id);
+	if (ret)
+		return ret;
+	return mtk_reset_deassert_set_clr(rcdev, id);
+}
+
 static const struct reset_control_ops mtk_reset_ops = {
 	.assert = mtk_reset_assert,
 	.deassert = mtk_reset_deassert,
 	.reset = mtk_reset,
 };
 
-void mtk_register_reset_controller(struct device_node *np,
-			unsigned int num_regs, int regofs)
+static const struct reset_control_ops mtk_reset_ops_set_clr = {
+	.assert = mtk_reset_assert_set_clr,
+	.deassert = mtk_reset_deassert_set_clr,
+	.reset = mtk_reset_set_clr,
+};
+
+void mtk_register_reset_controller_common(struct device_node *np,
+			unsigned int num_regs, int regofs,
+			const struct reset_control_ops *reset_ops)
 {
 	struct mtk_reset *data;
 	int ret;
@@ -77,7 +113,7 @@ void mtk_register_reset_controller(struct device_node *np,
 	data->regofs = regofs;
 	data->rcdev.owner = THIS_MODULE;
 	data->rcdev.nr_resets = num_regs * 32;
-	data->rcdev.ops = &mtk_reset_ops;
+	data->rcdev.ops = reset_ops;
 	data->rcdev.of_node = np;
 
 	ret = reset_controller_register(&data->rcdev);
@@ -87,3 +123,17 @@ void mtk_register_reset_controller(struct device_node *np,
 		return;
 	}
 }
+
+void mtk_register_reset_controller(struct device_node *np,
+	unsigned int num_regs, int regofs)
+{
+	mtk_register_reset_controller_common(np, num_regs, regofs,
+		&mtk_reset_ops);
+}
+
+void mtk_register_reset_controller_set_clr(struct device_node *np,
+	unsigned int num_regs, int regofs)
+{
+	mtk_register_reset_controller_common(np, num_regs, regofs,
+		&mtk_reset_ops_set_clr);
+}
diff --git a/include/dt-bindings/reset-controller/mt8183-resets.h b/include/dt-bindings/reset-controller/mt8183-resets.h
new file mode 100644
index 000000000000..faa6bcbdb8da
--- /dev/null
+++ b/include/dt-bindings/reset-controller/mt8183-resets.h
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019 MediaTek Inc.
+ * Author: Yong Liang <yong.liang@mediatek.com>
+ */
+
+#ifndef _DT_BINDINGS_RESET_CONTROLLER_MT8183
+#define _DT_BINDINGS_RESET_CONTROLLER_MT8183
+
+/* INFRACFG AO resets */
+#define MT8183_INFRACFG_AO_THERM_SW_RST				0
+#define MT8183_INFRACFG_AO_USB_TOP_SW_RST			1
+#define MT8183_INFRACFG_AO_MM_IOMMU_SW_RST			3
+#define MT8183_INFRACFG_AO_MSDC3_SW_RST				4
+#define MT8183_INFRACFG_AO_MSDC2_SW_RST				5
+#define MT8183_INFRACFG_AO_MSDC1_SW_RST				6
+#define MT8183_INFRACFG_AO_MSDC0_SW_RST				7
+#define MT8183_INFRACFG_AO_APDMA_SW_RST				9
+#define MT8183_INFRACFG_AO_MIMP_D_SW_RST			10
+#define MT8183_INFRACFG_AO_BTIF_SW_RST				12
+#define MT8183_INFRACFG_AO_DISP_PWM_SW_RST			14
+#define MT8183_INFRACFG_AO_AUXADC_SW_RST			15
+
+#define MT8183_INFRACFG_AO_IRTX_SW_RST				32
+#define MT8183_INFRACFG_AO_SPI0_SW_RST				33
+#define MT8183_INFRACFG_AO_I2C0_SW_RST				34
+#define MT8183_INFRACFG_AO_I2C1_SW_RST				35
+#define MT8183_INFRACFG_AO_I2C2_SW_RST				36
+#define MT8183_INFRACFG_AO_I2C3_SW_RST				37
+#define MT8183_INFRACFG_AO_UART0_SW_RST				38
+#define MT8183_INFRACFG_AO_UART1_SW_RST				39
+#define MT8183_INFRACFG_AO_UART2_SW_RST				40
+#define MT8183_INFRACFG_AO_PWM_SW_RST				41
+#define MT8183_INFRACFG_AO_SPI1_SW_RST				42
+#define MT8183_INFRACFG_AO_I2C4_SW_RST				43
+#define MT8183_INFRACFG_AO_DVFSP_SW_RST				44
+#define MT8183_INFRACFG_AO_SPI2_SW_RST				45
+#define MT8183_INFRACFG_AO_SPI3_SW_RST				46
+#define MT8183_INFRACFG_AO_UFSHCI_SW_RST			47
+
+#define MT8183_INFRACFG_AO_PMIC_WRAP_SW_RST			64
+#define MT8183_INFRACFG_AO_SPM_SW_RST				65
+#define MT8183_INFRACFG_AO_USBSIF_SW_RST			66
+#define MT8183_INFRACFG_AO_KP_SW_RST				68
+#define MT8183_INFRACFG_AO_APXGPT_SW_RST			69
+#define MT8183_INFRACFG_AO_CLDMA_AO_SW_RST			70
+#define MT8183_INFRACFG_AO_UNIPRO_UFS_SW_RST			71
+#define MT8183_INFRACFG_AO_DX_CC_SW_RST				72
+#define MT8183_INFRACFG_AO_UFSPHY_SW_RST			73
+
+#define MT8183_INFRACFG_AO_DX_CC_SEC_SW_RST			96
+#define MT8183_INFRACFG_AO_GCE_SW_RST				97
+#define MT8183_INFRACFG_AO_CLDMA_SW_RST				98
+#define MT8183_INFRACFG_AO_TRNG_SW_RST				99
+#define MT8183_INFRACFG_AO_AP_MD_CCIF_1_SW_RST			103
+#define MT8183_INFRACFG_AO_AP_MD_CCIF_SW_RST			104
+#define MT8183_INFRACFG_AO_I2C1_IMM_SW_RST			105
+#define MT8183_INFRACFG_AO_I2C1_ARB_SW_RST			106
+#define MT8183_INFRACFG_AO_I2C2_IMM_SW_RST			107
+#define MT8183_INFRACFG_AO_I2C2_ARB_SW_RST			108
+#define MT8183_INFRACFG_AO_I2C5_SW_RST				109
+#define MT8183_INFRACFG_AO_I2C5_IMM_SW_RST			110
+#define MT8183_INFRACFG_AO_I2C5_ARB_SW_RST			111
+#define MT8183_INFRACFG_AO_SPI4_SW_RST				112
+#define MT8183_INFRACFG_AO_SPI5_SW_RST				113
+#define MT8183_INFRACFG_AO_INFRA2MFGAXI_CBIP_CLAS_SW_RST	114
+#define MT8183_INFRACFG_AO_MFGAXI2INFRA_M0_CBIP_GLAS_OUT_SW_RST	115
+#define MT8183_INFRACFG_AO_MFGAXI2INFRA_M1_CBIP_GLAS_OUT_SW_RST	116
+#define MT8183_INFRACFG_AO_UFS_AES_SW_RST			117
+#define MT8183_INFRACFG_AO_CCU_I2C_IRQ_SW_RST			118
+#define MT8183_INFRACFG_AO_CCU_I2C_DMA_SW_RST			119
+#define MT8183_INFRACFG_AO_I2C6_SW_RST				120
+#define MT8183_INFRACFG_AO_CCU_GALS_SW_RST			121
+#define MT8183_INFRACFG_AO_IPU_GALS_SW_RST			122
+#define MT8183_INFRACFG_AO_CONN2AP_GALS_SW_RST			123
+#define MT8183_INFRACFG_AO_AP_MD_CCIF2_SW_RST			124
+#define MT8183_INFRACFG_AO_AP_MD_CCIF3_SW_RST			125
+#define MT8183_INFRACFG_AO_I2C7_SW_RST				126
+#define MT8183_INFRACFG_AO_I2C8_SW_RST				127
+
+#endif  /* _DT_BINDINGS_RESET_CONTROLLER_MT8183 */
-- 
2.18.0


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