From 23fa18eaa71266feff7ba8d83022d9e1cc83c65a Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:42:03 +0000
Subject: [PATCH] disable pwm7
---
kernel/drivers/media/rc/sunxi-cir.c | 107 ++++++++++++++++++++++++++++++++++++-----------------
1 files changed, 72 insertions(+), 35 deletions(-)
diff --git a/kernel/drivers/media/rc/sunxi-cir.c b/kernel/drivers/media/rc/sunxi-cir.c
index 0114e81..4afc589 100644
--- a/kernel/drivers/media/rc/sunxi-cir.c
+++ b/kernel/drivers/media/rc/sunxi-cir.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for Allwinner sunXi IR controller
*
@@ -7,16 +8,6 @@
* Based on sun5i-ir.c:
* Copyright (C) 2007-2012 Daniel Wang
* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
*/
#include <linux/clk.h>
@@ -48,11 +39,11 @@
/* Rx Interrupt Enable */
#define SUNXI_IR_RXINT_REG 0x2C
-/* Rx FIFO Overflow */
+/* Rx FIFO Overflow Interrupt Enable */
#define REG_RXINT_ROI_EN BIT(0)
-/* Rx Packet End */
+/* Rx Packet End Interrupt Enable */
#define REG_RXINT_RPEI_EN BIT(1)
-/* Rx FIFO Data Available */
+/* Rx FIFO Data Available Interrupt Enable */
#define REG_RXINT_RAI_EN BIT(4)
/* Rx FIFO available byte level */
@@ -60,6 +51,12 @@
/* Rx Interrupt Status */
#define SUNXI_IR_RXSTA_REG 0x30
+/* Rx FIFO Overflow */
+#define REG_RXSTA_ROI REG_RXINT_ROI_EN
+/* Rx Packet End */
+#define REG_RXSTA_RPE REG_RXINT_RPEI_EN
+/* Rx FIFO Data Available */
+#define REG_RXSTA_RA REG_RXINT_RAI_EN
/* RX FIFO Get Available Counter */
#define REG_RXSTA_GET_AC(val) (((val) >> 8) & (ir->fifo_size * 2 - 1))
/* Clear all interrupt status value */
@@ -81,6 +78,17 @@
/* Time after which device stops sending data in ms */
#define SUNXI_IR_TIMEOUT 120
+/**
+ * struct sunxi_ir_quirks - Differences between SoC variants.
+ *
+ * @has_reset: SoC needs reset deasserted.
+ * @fifo_size: size of the fifo.
+ */
+struct sunxi_ir_quirks {
+ bool has_reset;
+ int fifo_size;
+};
+
struct sunxi_ir {
spinlock_t ir_lock;
struct rc_dev *rc;
@@ -99,7 +107,7 @@
unsigned char dt;
unsigned int cnt, rc;
struct sunxi_ir *ir = dev_id;
- DEFINE_IR_RAW_EVENT(rawir);
+ struct ir_raw_event rawir = {};
spin_lock(&ir->ir_lock);
@@ -108,7 +116,7 @@
/* clean all pending statuses */
writel(status | REG_RXSTA_CLEARALL, ir->base + SUNXI_IR_RXSTA_REG);
- if (status & (REG_RXINT_RAI_EN | REG_RXINT_RPEI_EN)) {
+ if (status & (REG_RXSTA_RA | REG_RXSTA_RPE)) {
/* How many messages in fifo */
rc = REG_RXSTA_GET_AC(status);
/* Sanity check */
@@ -124,9 +132,9 @@
}
}
- if (status & REG_RXINT_ROI_EN) {
+ if (status & REG_RXSTA_ROI) {
ir_raw_event_reset(ir->rc);
- } else if (status & REG_RXINT_RPEI_EN) {
+ } else if (status & REG_RXSTA_RPE) {
ir_raw_event_set_idle(ir->rc, true);
ir_raw_event_handle(ir->rc);
} else {
@@ -145,6 +153,7 @@
struct device *dev = &pdev->dev;
struct device_node *dn = dev->of_node;
+ const struct sunxi_ir_quirks *quirks;
struct resource *res;
struct sunxi_ir *ir;
u32 b_clk_freq = SUNXI_IR_BASE_CLK;
@@ -153,12 +162,15 @@
if (!ir)
return -ENOMEM;
+ quirks = of_device_get_match_data(&pdev->dev);
+ if (!quirks) {
+ dev_err(&pdev->dev, "Failed to determine the quirks to use\n");
+ return -ENODEV;
+ }
+
spin_lock_init(&ir->ir_lock);
- if (of_device_is_compatible(dn, "allwinner,sun5i-a13-ir"))
- ir->fifo_size = 64;
- else
- ir->fifo_size = 16;
+ ir->fifo_size = quirks->fifo_size;
/* Clock */
ir->apb_clk = devm_clk_get(dev, "apb");
@@ -175,13 +187,15 @@
/* Base clock frequency (optional) */
of_property_read_u32(dn, "clock-frequency", &b_clk_freq);
- /* Reset (optional) */
- ir->rst = devm_reset_control_get_optional_exclusive(dev, NULL);
- if (IS_ERR(ir->rst))
- return PTR_ERR(ir->rst);
- ret = reset_control_deassert(ir->rst);
- if (ret)
- return ret;
+ /* Reset */
+ if (quirks->has_reset) {
+ ir->rst = devm_reset_control_get_exclusive(dev, NULL);
+ if (IS_ERR(ir->rst))
+ return PTR_ERR(ir->rst);
+ ret = reset_control_deassert(ir->rst);
+ if (ret)
+ return ret;
+ }
ret = clk_set_rate(ir->clk, b_clk_freq);
if (ret) {
@@ -206,7 +220,6 @@
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ir->base = devm_ioremap_resource(dev, res);
if (IS_ERR(ir->base)) {
- dev_err(dev, "failed to map registers\n");
ret = PTR_ERR(ir->base);
goto exit_clkdisable_clk;
}
@@ -230,8 +243,8 @@
ir->rc->dev.parent = dev;
ir->rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
/* Frequency after IR internal divider with sample period in ns */
- ir->rc->rx_resolution = (1000000000ul / (b_clk_freq / 64));
- ir->rc->timeout = MS_TO_NS(SUNXI_IR_TIMEOUT);
+ ir->rc->rx_resolution = (USEC_PER_SEC / (b_clk_freq / 64));
+ ir->rc->timeout = MS_TO_US(SUNXI_IR_TIMEOUT);
ir->rc->driver_name = SUNXI_IR_DEV;
ret = rc_register_device(ir->rc);
@@ -245,7 +258,6 @@
/* IRQ */
ir->irq = platform_get_irq(pdev, 0);
if (ir->irq < 0) {
- dev_err(dev, "no irq resource\n");
ret = ir->irq;
goto exit_free_dev;
}
@@ -318,10 +330,35 @@
return 0;
}
+static const struct sunxi_ir_quirks sun4i_a10_ir_quirks = {
+ .has_reset = false,
+ .fifo_size = 16,
+};
+
+static const struct sunxi_ir_quirks sun5i_a13_ir_quirks = {
+ .has_reset = false,
+ .fifo_size = 64,
+};
+
+static const struct sunxi_ir_quirks sun6i_a31_ir_quirks = {
+ .has_reset = true,
+ .fifo_size = 64,
+};
+
static const struct of_device_id sunxi_ir_match[] = {
- { .compatible = "allwinner,sun4i-a10-ir", },
- { .compatible = "allwinner,sun5i-a13-ir", },
- {},
+ {
+ .compatible = "allwinner,sun4i-a10-ir",
+ .data = &sun4i_a10_ir_quirks,
+ },
+ {
+ .compatible = "allwinner,sun5i-a13-ir",
+ .data = &sun5i_a13_ir_quirks,
+ },
+ {
+ .compatible = "allwinner,sun6i-a31-ir",
+ .data = &sun6i_a31_ir_quirks,
+ },
+ {}
};
MODULE_DEVICE_TABLE(of, sunxi_ir_match);
--
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