linux-kernel - [PATCH v5 06/21] hwmon: (mr75203) enable polling for all VM channels

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Message-ID: <20220908152449.35457-7-farbere@amazon.com>
Date:   Thu, 8 Sep 2022 15:24:34 +0000
From:   Eliav Farber <farbere@...zon.com>
To:     <jdelvare@...e.com>, <linux@...ck-us.net>, <robh+dt@...nel.org>,
        <p.zabel@...gutronix.de>, <rtanwar@...linear.com>,
        <andriy.shevchenko@...el.com>, <linux-hwmon@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <farbere@...zon.com>, <hhhawa@...zon.com>, <jonnyc@...zon.com>,
        "Andy Shevchenko" <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v5 06/21] hwmon: (mr75203) enable polling for all VM channels

Configure ip-polling register to enable polling for all voltage monitor
channels.
This enables reading the voltage values for all inputs other than just
input 0.

Fixes: 9d823351a337 ("hwmon: Add hardware monitoring driver for Moortec MR75203 PVT controller")
Signed-off-by: Eliav Farber <farbere@...zon.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
V3 -> V2:
- Move configuration of ip-polling register from previous patch to a
  separate commit.

V4 -> V3:
- Replace GENMASK(pvt->c_num - 1, 0)  with (BIT(pvt->c_num) - 1).

 drivers/hwmon/mr75203.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/hwmon/mr75203.c b/drivers/hwmon/mr75203.c
index 87a14713e124..41e3d3b54baf 100644
--- a/drivers/hwmon/mr75203.c
+++ b/drivers/hwmon/mr75203.c
@@ -398,6 +398,19 @@ static int pvt_init(struct pvt_device *pvt)
 		if (ret)
 			return ret;
 
+		val = (BIT(pvt->c_num) - 1) | VM_CH_INIT |
+		      IP_POLL << SDIF_ADDR_SFT | SDIF_WRN_W | SDIF_PROG;
+		ret = regmap_write(v_map, SDIF_W, val);
+		if (ret < 0)
+			return ret;
+
+		ret = regmap_read_poll_timeout(v_map, SDIF_STAT,
+					       val, !(val & SDIF_BUSY),
+					       PVT_POLL_DELAY_US,
+					       PVT_POLL_TIMEOUT_US);
+		if (ret)
+			return ret;
+
 		val = CFG1_VOL_MEAS_MODE | CFG1_PARALLEL_OUT |
 		      CFG1_14_BIT | IP_CFG << SDIF_ADDR_SFT |
 		      SDIF_WRN_W | SDIF_PROG;
-- 
2.37.1