linux-kernel - [PATCH 1/1] power: supply: sbs-battery: Add ability to force load a battery via the devicetree

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Date:   Thu, 25 Jul 2019 12:56:41 +0800
From:   Richard Tresidder <rtresidd@...ctromag.com.au>
To:     sre@...nel.org, kstewart@...uxfoundation.org,
        gregkh@...uxfoundation.org, tglx@...utronix.de,
        rfontana@...hat.com, allison@...utok.net,
        rtresidd@...ctromag.com.au, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/1] power: supply: sbs-battery: Add ability to force load a battery via the devicetree

Add the ability to force load a hot pluggable battery during boot where
there is no gpio detect method available and the module is statically
built. Normal polling will then occur on that battery when it is inserted.

Signed-off-by: Richard Tresidder <rtresidd@...ctromag.com.au>
---

Notes:
    Add the ability to force load a hot pluggable battery during boot where
    there is no gpio detect method available and the module is statically
    built. Normal polling will then occur on that battery when it is inserted.

 drivers/power/supply/sbs-battery.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/power/supply/sbs-battery.c b/drivers/power/supply/sbs-battery.c
index 048d205..ea8ba3e 100644
--- a/drivers/power/supply/sbs-battery.c
+++ b/drivers/power/supply/sbs-battery.c
@@ -161,6 +161,7 @@ struct sbs_info {
 	int				poll_time;
 	u32				i2c_retry_count;
 	u32				poll_retry_count;
+	bool				force_load;
 	struct delayed_work		work;
 	struct mutex			mode_lock;
 	u32				flags;
@@ -852,6 +853,9 @@ static int sbs_probe(struct i2c_client *client,
 	if (rc)
 		chip->poll_retry_count = 0;
 
+	chip->force_load = of_property_read_bool(client->dev.of_node,
+						"sbs,force-load");
+
 	if (pdata) {
 		chip->poll_retry_count = pdata->poll_retry_count;
 		chip->i2c_retry_count  = pdata->i2c_retry_count;
@@ -890,7 +894,7 @@ static int sbs_probe(struct i2c_client *client,
 	 * Before we register, we might need to make sure we can actually talk
 	 * to the battery.
 	 */
-	if (!(force_load || chip->gpio_detect)) {
+	if (!(force_load || chip->gpio_detect || chip->force_load)) {
 		rc = sbs_read_word_data(client, sbs_data[REG_STATUS].addr);
 
 		if (rc < 0) {
-- 
1.8.3.1