From: Dan Murphy <dmurphy@ti.com>
To: <jacek.anaszewski@gmail.com>, <pavel@ucw.cz>, <tony@atomide.com>,
<sre@kernel.org>, <nekit1000@gmail.com>, <mpartap@gmx.net>,
<merlijn@wizzup.org>
Cc: <linux-leds@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
Dan Murphy <dmurphy@ti.com>
Subject: [PATCH 3/3] leds: lm3532: Add full scale current configuration
Date: Thu, 1 Aug 2019 10:14:21 -0500 [thread overview]
Message-ID: <20190801151421.21486-3-dmurphy@ti.com> (raw)
In-Reply-To: <20190801151421.21486-1-dmurphy@ti.com>
Allow the full scale current to be configured at init.
Valid rangles are 5mA->29.8mA.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
drivers/leds/leds-lm3532.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/leds/leds-lm3532.c b/drivers/leds/leds-lm3532.c
index ff197adb2f22..114fea12ec21 100644
--- a/drivers/leds/leds-lm3532.c
+++ b/drivers/leds/leds-lm3532.c
@@ -91,6 +91,10 @@
#define LM3532_NUM_AVG_VALS 8
#define LM3532_NUM_IMP_VALS 32
+#define LM3532_FS_CURR_MIN 5000
+#define LM3532_FS_CURR_MAX 29800
+#define LM3532_FS_CURR_STEP 800
+
/*
* struct lm3532_als_data
* @config - value of ALS configuration register
@@ -133,6 +137,7 @@ struct lm3532_led {
int mode;
int num_leds;
int ctrl_brt_pointer;
+ int full_scale_current;
u32 led_strings[LM3532_MAX_CONTROL_BANKS];
char label[LED_MAX_NAME_SIZE];
};
@@ -362,6 +367,8 @@ static int lm3532_init_registers(struct lm3532_led *led)
unsigned int output_cfg_mask = 0;
int brightness_config_reg;
int brightness_config_val;
+ int fs_current_reg;
+ int fs_current_val;
int ret, i;
if (drvdata->enable_gpio)
@@ -383,6 +390,16 @@ static int lm3532_init_registers(struct lm3532_led *led)
if (ret)
return ret;
+ if (led->full_scale_current) {
+ fs_current_reg = LM3532_REG_CTRL_A_FS_CURR + led->control_bank * 2;
+ fs_current_val = led->full_scale_current - LM3532_FS_CURR_MIN /
+ LM3532_FS_CURR_STEP;
+ ret = regmap_write(drvdata->regmap, fs_current_reg,
+ fs_current_val);
+ if (ret)
+ return ret;
+ }
+
for (i = 0; i < led->num_leds; i++) {
output_cfg_shift = led->led_strings[i] * 2;
output_cfg_val |= (led->control_bank << output_cfg_shift);
@@ -558,6 +575,12 @@ static int lm3532_parse_node(struct lm3532_data *priv)
goto child_out;
}
+ ret = fwnode_property_read_u32(child, "ti,fs-current",
+ &led->full_scale_current);
+
+ if (led->full_scale_current > LM3532_FS_CURR_MAX)
+ led->full_scale_current = LM3532_FS_CURR_MAX;
+
if (led->mode == LM3532_BL_MODE_ALS) {
led->mode = LM3532_ALS_CTRL;
ret = lm3532_parse_als(priv);
--
2.22.0.214.g8dca754b1e
next prev parent reply other threads:[~2019-08-01 15:14 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-01 15:14 [PATCH 1/3] leds: lm3532: Fix brightness control for i2c mode Dan Murphy
2019-08-01 15:14 ` [PATCH 2/3] dt: lm3532: Add property for full scale current Dan Murphy
2019-08-01 18:53 ` Jacek Anaszewski
2019-08-01 19:12 ` Dan Murphy
2019-08-01 15:14 ` Dan Murphy [this message]
2019-08-01 18:52 ` [PATCH 1/3] leds: lm3532: Fix brightness control for i2c mode Jacek Anaszewski
2019-08-01 19:17 ` Dan Murphy
2019-08-01 19:48 ` Jacek Anaszewski
2019-08-01 21:36 ` Pavel Machek
2019-08-02 0:02 ` Dan Murphy
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