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Message-ID: <20240122081754.17058-2-Wenhua.Lin@unisoc.com>
Date: Mon, 22 Jan 2024 16:17:49 +0800
From: Wenhua Lin <Wenhua.Lin@...soc.com>
To: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
CC: Orson Zhai <orsonzhai@...il.com>,
Baolin Wang
<baolin.wang@...ux.alibaba.com>,
Chunyan Zhang <zhang.lyra@...il.com>, <linux-pwm@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, wenhua lin
<wenhua.lin1994@...il.com>,
Wenhua Lin <Wenhua.Lin@...soc.com>,
Xiongpeng Wu
<xiongpeng.wu@...soc.com>,
zhaochen su <zhaochen.su29@...il.com>,
Zhaochen Su
<Zhaochen.Su@...soc.com>,
Xiaolong Wang <Xiaolong.Wang@...soc.com>
Subject: [PATCH 1/6] pwm: sprd: Add support for UMS9620
The PMW unit on the current Unisoc's SoCs has 4 channels but has different
address offsets. On UMS512, they are 0x0, 0x20, 0x40, 0x60 respectively,
while are 0x0, 0x4000, 0x8000, 0xC000 on UMS9620.
Signed-off-by: Wenhua Lin <Wenhua.Lin@...soc.com>
---
drivers/pwm/pwm-sprd.c | 28 ++++++++++++++++++++++++----
1 file changed, 24 insertions(+), 4 deletions(-)
diff --git a/drivers/pwm/pwm-sprd.c b/drivers/pwm/pwm-sprd.c
index 77939e161006..bc1e3ed13528 100644
--- a/drivers/pwm/pwm-sprd.c
+++ b/drivers/pwm/pwm-sprd.c
@@ -9,6 +9,7 @@
#include <linux/math64.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
+#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pwm.h>
@@ -23,7 +24,6 @@
#define SPRD_PWM_ENABLE_BIT BIT(0)
#define SPRD_PWM_CHN_NUM 4
-#define SPRD_PWM_REGS_SHIFT 5
#define SPRD_PWM_CHN_CLKS_NUM 2
#define SPRD_PWM_CHN_OUTPUT_CLK 1
@@ -32,14 +32,27 @@ struct sprd_pwm_chn {
u32 clk_rate;
};
+struct sprd_pwm_data {
+ int reg_shift;
+};
+
struct sprd_pwm_chip {
void __iomem *base;
struct device *dev;
struct pwm_chip chip;
+ const struct sprd_pwm_data *pdata;
int num_pwms;
struct sprd_pwm_chn chn[SPRD_PWM_CHN_NUM];
};
+static const struct sprd_pwm_data ums512_data = {
+ .reg_shift = 5,
+};
+
+static const struct sprd_pwm_data ums9620_data = {
+ .reg_shift = 14,
+};
+
static inline struct sprd_pwm_chip* sprd_pwm_from_chip(struct pwm_chip *chip)
{
return container_of(chip, struct sprd_pwm_chip, chip);
@@ -58,7 +71,7 @@ static const char * const sprd_pwm_clks[] = {
static u32 sprd_pwm_read(struct sprd_pwm_chip *spc, u32 hwid, u32 reg)
{
- u32 offset = reg + (hwid << SPRD_PWM_REGS_SHIFT);
+ u32 offset = reg + (hwid << spc->pdata->reg_shift);
return readl_relaxed(spc->base + offset);
}
@@ -66,7 +79,7 @@ static u32 sprd_pwm_read(struct sprd_pwm_chip *spc, u32 hwid, u32 reg)
static void sprd_pwm_write(struct sprd_pwm_chip *spc, u32 hwid,
u32 reg, u32 val)
{
- u32 offset = reg + (hwid << SPRD_PWM_REGS_SHIFT);
+ u32 offset = reg + (hwid << spc->pdata->reg_shift);
writel_relaxed(val, spc->base + offset);
}
@@ -253,6 +266,7 @@ static int sprd_pwm_clk_init(struct sprd_pwm_chip *spc)
static int sprd_pwm_probe(struct platform_device *pdev)
{
struct sprd_pwm_chip *spc;
+ const void *priv;
int ret;
spc = devm_kzalloc(&pdev->dev, sizeof(*spc), GFP_KERNEL);
@@ -263,6 +277,11 @@ static int sprd_pwm_probe(struct platform_device *pdev)
if (IS_ERR(spc->base))
return PTR_ERR(spc->base);
+ priv = of_device_get_match_data(&pdev->dev);
+ if (!priv)
+ return dev_err_probe(&pdev->dev, -EINVAL, "get regs shift failed!\n");
+ spc->pdata = priv;
+
spc->dev = &pdev->dev;
ret = sprd_pwm_clk_init(spc);
@@ -281,7 +300,8 @@ static int sprd_pwm_probe(struct platform_device *pdev)
}
static const struct of_device_id sprd_pwm_of_match[] = {
- { .compatible = "sprd,ums512-pwm", },
+ { .compatible = "sprd,ums512-pwm", .data = (void *)&ums512_data},
+ { .compatible = "sprd,ums9620-pwm", .data = (void *)&ums9620_data},
{ },
};
MODULE_DEVICE_TABLE(of, sprd_pwm_of_match);
--
2.17.1
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