Merge tag 'staging-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging and IIO driver updates from Greg KH:
 "Here is the "big" set of staging and IIO driver patches for 5.12-rc1.

  Nothing really huge in here, the number of staging tree patches has
  gone down for a bit, maybe there's only so much churn to happen in
  here at the moment.

  The IIO changes are:

   - new drivers

   - new DT bindings

   - new iio driver features

  with full details in the shortlog.

  The staging driver patches are just a lot of tiny coding style
  cleanups, along with some semi-larger hikey driver cleanups as those
  are _almost_ good enough to get out of the staging tree, but will
  probably have to wait until 5.13 to have happen.

  All of these have been in linux-next with no reported issues"

* tag 'staging-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (189 commits)
  staging: hikey9xx: Fix alignment of function parameters
  staging: greybus: Fixed a misspelling in hid.c
  staging: wimax/i2400m: fix some byte order issues found by sparse
  staging: wimax: i2400m: fix some incorrect type warnings
  staging: greybus: minor code style fix
  staging:wlan-ng: use memdup_user instead of kmalloc/copy_from_user
  staging:r8188eu: use IEEE80211_FCTL_* kernel definitions
  staging: rtl8192e: remove multiple blank lines
  staging: greybus: Fixed alignment issue in hid.c
  staging: wfx: remove unused included header files
  staging: nvec: minor coding style fix
  staging: wimax: Fix some coding style problem
  staging: fbtft: add tearing signal detect
  staging: vt6656: Fixed issue with alignment in rf.c
  staging: qlge: Remove duplicate word in comment
  staging: rtl8723bs: remove obsolete commented out code
  staging: rtl8723bs: fix function comments to follow kernel-doc
  staging: wfx: avoid defining array of flexible struct
  staging: rtl8723bs: Replace one-element array with flexible-array member in struct ndis_80211_var_ie
  staging: Replace lkml.org links with lore
  ...

1 files changed, 61 insertions, 15 deletions

diff --git a/drivers/iio/common/ms_sensors/ms_sensors_i2c.c b/drivers/iio/common/ms_sensors/ms_sensors_i2c.c
index b9e2038d05ef..16ea697e945c 100644
--- a/drivers/iio/common/ms_sensors/ms_sensors_i2c.c
+++ b/drivers/iio/common/ms_sensors/ms_sensors_i2c.c
@@ -488,24 +488,20 @@ int ms_sensors_ht_read_humidity(struct ms_ht_dev *dev_data,
 EXPORT_SYMBOL(ms_sensors_ht_read_humidity);
 
 /**
- * ms_sensors_tp_crc_valid() - CRC check function for
+ * ms_sensors_tp_crc4() - Calculate PROM CRC for
  *     Temperature and pressure devices.
  *     This function is only used when reading PROM coefficients
  *
  * @prom:	pointer to PROM coefficients array
- * @len:	length of PROM coefficients array
  *
- * Return: True if CRC is ok.
+ * Return: CRC.
  */
-static bool ms_sensors_tp_crc_valid(u16 *prom, u8 len)
+static u8 ms_sensors_tp_crc4(u16 *prom)
 {
 	unsigned int cnt, n_bit;
-	u16 n_rem = 0x0000, crc_read = prom[0], crc = (*prom & 0xF000) >> 12;
-
-	prom[len - 1] = 0;
-	prom[0] &= 0x0FFF;      /* Clear the CRC computation part */
+	u16 n_rem = 0x0000;
 
-	for (cnt = 0; cnt < len * 2; cnt++) {
+	for (cnt = 0; cnt < MS_SENSORS_TP_PROM_WORDS_NB * 2; cnt++) {
 		if (cnt % 2 == 1)
 			n_rem ^= prom[cnt >> 1] & 0x00FF;
 		else
@@ -518,10 +514,55 @@ static bool ms_sensors_tp_crc_valid(u16 *prom, u8 len)
 				n_rem <<= 1;
 		}
 	}
-	n_rem >>= 12;
-	prom[0] = crc_read;
 
-	return n_rem == crc;
+	return n_rem >> 12;
+}
+
+/**
+ * ms_sensors_tp_crc_valid_112() - CRC check function for
+ *     Temperature and pressure devices for 112bit PROM.
+ *     This function is only used when reading PROM coefficients
+ *
+ * @prom:	pointer to PROM coefficients array
+ *
+ * Return: True if CRC is ok.
+ */
+static bool ms_sensors_tp_crc_valid_112(u16 *prom)
+{
+	u16 w0 = prom[0], crc_read = (w0 & 0xF000) >> 12;
+	u8 crc;
+
+	prom[0] &= 0x0FFF;      /* Clear the CRC computation part */
+	prom[MS_SENSORS_TP_PROM_WORDS_NB - 1] = 0;
+
+	crc = ms_sensors_tp_crc4(prom);
+
+	prom[0] = w0;
+
+	return crc == crc_read;
+}
+
+/**
+ * ms_sensors_tp_crc_valid_128() - CRC check function for
+ *     Temperature and pressure devices for 128bit PROM.
+ *     This function is only used when reading PROM coefficients
+ *
+ * @prom:	pointer to PROM coefficients array
+ *
+ * Return: True if CRC is ok.
+ */
+static bool ms_sensors_tp_crc_valid_128(u16 *prom)
+{
+	u16 w7 = prom[7], crc_read = w7 & 0x000F;
+	u8 crc;
+
+	prom[7] &= 0xFF00;      /* Clear the CRC and LSB part */
+
+	crc = ms_sensors_tp_crc4(prom);
+
+	prom[7] = w7;
+
+	return crc == crc_read;
 }
 
 /**
@@ -536,8 +577,9 @@ static bool ms_sensors_tp_crc_valid(u16 *prom, u8 len)
 int ms_sensors_tp_read_prom(struct ms_tp_dev *dev_data)
 {
 	int i, ret;
+	bool valid;
 
-	for (i = 0; i < MS_SENSORS_TP_PROM_WORDS_NB; i++) {
+	for (i = 0; i < dev_data->hw->prom_len; i++) {
 		ret = ms_sensors_read_prom_word(
 			dev_data->client,
 			MS_SENSORS_TP_PROM_READ + (i << 1),
@@ -547,8 +589,12 @@ int ms_sensors_tp_read_prom(struct ms_tp_dev *dev_data)
 			return ret;
 	}
 
-	if (!ms_sensors_tp_crc_valid(dev_data->prom,
-				     MS_SENSORS_TP_PROM_WORDS_NB + 1)) {
+	if (dev_data->hw->prom_len == 8)
+		valid = ms_sensors_tp_crc_valid_128(dev_data->prom);
+	else
+		valid = ms_sensors_tp_crc_valid_112(dev_data->prom);
+
+	if (!valid) {
 		dev_err(&dev_data->client->dev,
 			"Calibration coefficients crc check error\n");
 		return -ENODEV;