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From:   Luca Weiss <luca@z3ntu.xyz>
Date:   Sun, 30 Apr 2023 20:20:54 +0200
Subject: [PATCH 2/5] Input: drv260x - sleep between polling GO bit
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Message-Id: <20230430-drv260x-improvements-v1-2-1fb28b4cc698@z3ntu.xyz>
References: <20230430-drv260x-improvements-v1-0-1fb28b4cc698@z3ntu.xyz>
In-Reply-To: <20230430-drv260x-improvements-v1-0-1fb28b4cc698@z3ntu.xyz>
To:     ~postmarketos/upstreaming@lists.sr.ht, phone-devel@vger.kernel.org,
        Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        Dan Murphy <dmurphy@ti.com>, Andy Gross <agross@kernel.org>,
        Bjorn Andersson <andersson@kernel.org>,
        Konrad Dybcio <konrad.dybcio@linaro.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Raffaele Tranquillini <raffaele.tranquillini@gmail.com>,
        Yassine Oudjana <y.oudjana@protonmail.com>
Cc:     linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
        Luca Weiss <luca@z3ntu.xyz>
Precedence: bulk

When doing the initial startup there's no need to poll without any
delay and spam the I2C bus.

Let's sleep 15ms between each attempt, which is the same time as used
in the vendor driver.

Fixes: 7132fe4f5687 ("Input: drv260x - add TI drv260x haptics driver")
Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
---
 drivers/input/misc/drv260x.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/input/misc/drv260x.c b/drivers/input/misc/drv260x.c
index e95c4e775b5d..884d43eb4b61 100644
--- a/drivers/input/misc/drv260x.c
+++ b/drivers/input/misc/drv260x.c
@@ -435,6 +435,7 @@ static int drv260x_init(struct drv260x_data *haptics)
 	}
 
 	do {
+		usleep_range(15000, 15500);
 		error = regmap_read(haptics->regmap, DRV260X_GO, &cal_buf);
 		if (error) {
 			dev_err(&haptics->client->dev,

-- 
2.40.1