linux-kernel - [PATCH v1 1/1] i2c: designware: Add a note about struct dw_scl_sda

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Message-Id: <20211203171318.62503-1-andriy.shevchenko@linux.intel.com>
Date:   Fri,  3 Dec 2021 19:13:18 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Wolfram Sang <wsa@...nel.org>, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>
Subject: [PATCH v1 1/1] i2c: designware: Add a note about struct dw_scl_sda_cfg usage

Add a note about struct dw_scl_sda_cfg usage to discourage people
of using this structure on new platforms. Instead they should try
hard to put the needed information into firmware descriptions.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/i2c/busses/i2c-designware-pcidrv.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c
index 0f409a4c2da0..3ba506c3a9a9 100644
--- a/drivers/i2c/busses/i2c-designware-pcidrv.c
+++ b/drivers/i2c/busses/i2c-designware-pcidrv.c
@@ -38,6 +38,13 @@ enum dw_pci_ctl_id_t {
 	navi_amd,
 };
 
+/*
+ * This is a legacy structure to describe the hardware counters
+ * to configure signal timings on the bus. For Device Tree platforms
+ * one should use the respective properties and for ACPI there is
+ * a set of ACPI methods that provide these counters. No new
+ * platform should use this structure.
+ */
 struct dw_scl_sda_cfg {
 	u32 ss_hcnt;
 	u32 fs_hcnt;
-- 
2.33.0