linux-kernel - [PATCH v3 7/7] mfd: tqmx86: assume 24MHz LPC clock for unknown boards

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Date:   Fri, 16 Jul 2021 12:00:53 +0200
From:   Matthias Schiffer <matthias.schiffer@...tq-group.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Lee Jones <lee.jones@...aro.org>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Matthias Schiffer <matthias.schiffer@...tq-group.com>
Subject: [PATCH v3 7/7] mfd: tqmx86: assume 24MHz LPC clock for unknown boards

All future TQMx86 modules should use a 24MHz LPC clock. Warn about
unknown boards, but assume this is the case.

Signed-off-by: Matthias Schiffer <matthias.schiffer@...tq-group.com>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
---

v2:
- Separated from TQMxE40M support patch
- Add warning for unknown boards

v3: no changes

 drivers/mfd/tqmx86.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/mfd/tqmx86.c b/drivers/mfd/tqmx86.c
index 58f35c8b5a45..7ae906ff8e35 100644
--- a/drivers/mfd/tqmx86.c
+++ b/drivers/mfd/tqmx86.c
@@ -147,7 +147,7 @@ static const char *tqmx86_board_id_to_name(u8 board_id)
 	}
 }
 
-static int tqmx86_board_id_to_clk_rate(u8 board_id)
+static int tqmx86_board_id_to_clk_rate(struct device *dev, u8 board_id)
 {
 	switch (board_id) {
 	case TQMX86_REG_BOARD_ID_50UC:
@@ -168,7 +168,9 @@ static int tqmx86_board_id_to_clk_rate(u8 board_id)
 	case TQMX86_REG_BOARD_ID_E38C:
 		return 33000;
 	default:
-		return 0;
+		dev_warn(dev, "unknown board %d, assuming 24MHz LPC clock\n",
+			 board_id);
+		return 24000;
 	}
 }
 
@@ -229,7 +231,7 @@ static int tqmx86_probe(struct platform_device *pdev)
 		tqmx_gpio_resources[0].flags = 0;
 	}
 
-	ocores_platform_data.clock_khz = tqmx86_board_id_to_clk_rate(board_id);
+	ocores_platform_data.clock_khz = tqmx86_board_id_to_clk_rate(dev, board_id);
 
 	if (i2c_det == TQMX86_REG_I2C_DETECT_SOFT) {
 		err = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
-- 
2.17.1