From: Sascha Hauer <s.hauer@pengutronix.de>
To: Barebox List <barebox@lists.infradead.org>
Subject: [PATCH 08/10] i2c: i.MX: Read clock-frequency from device tree
Date: Mon, 4 Mar 2019 10:18:41 +0100 [thread overview]
Message-ID: <20190304091843.17839-9-s.hauer@pengutronix.de> (raw)
In-Reply-To: <20190304091843.17839-1-s.hauer@pengutronix.de>
We speed up the clock frequency only if probed via platform_data.
Additionally honour the "clock-frequency" property.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
drivers/i2c/busses/i2c-imx.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
index 9ce6bb7533..409c178e6a 100644
--- a/drivers/i2c/busses/i2c-imx.c
+++ b/drivers/i2c/busses/i2c-imx.c
@@ -49,9 +49,6 @@
#include <i2c/i2c.h>
#include <mach/clock.h>
-/* Default value */
-#define FSL_I2C_BIT_RATE 100000 /* 100kHz */
-
/* IMX I2C registers:
* the I2C register offset is different between SoCs,
* to provid support for all these chips, split the
@@ -611,6 +608,7 @@ static int __init i2c_fsl_probe(struct device_d *pdev)
struct fsl_i2c_struct *i2c_fsl;
struct i2c_platform_data *pdata;
int ret;
+ int bitrate;
pdata = pdev->platform_data;
@@ -652,10 +650,12 @@ static int __init i2c_fsl_probe(struct device_d *pdev)
i2c_fsl->dfsrr = -1;
/* Set up clock divider */
+ bitrate = 100000;
+ of_property_read_u32(pdev->device_node, "clock-frequency", &bitrate);
if (pdata && pdata->bitrate)
- i2c_fsl_set_clk(i2c_fsl, pdata->bitrate);
- else
- i2c_fsl_set_clk(i2c_fsl, FSL_I2C_BIT_RATE);
+ bitrate = pdata->bitrate;
+
+ i2c_fsl_set_clk(i2c_fsl, bitrate);
/* Set up chip registers to defaults */
fsl_i2c_write_reg(i2c_fsl->hwdata->i2cr_ien_opcode ^ I2CR_IEN,
--
2.20.1
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next prev parent reply other threads:[~2019-03-04 9:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-04 9:18 [PATCH 00/10] i2c: i.MX more cleanup, early driver Sascha Hauer
2019-03-04 9:18 ` [PATCH 01/10] i2c: i.MX: remove unnecesary define Sascha Hauer
2019-03-04 9:18 ` [PATCH 02/10] i2c: i.MX: remove unnecessary ifdef Sascha Hauer
2019-03-04 9:18 ` [PATCH 03/10] i2c: i.MX: Fix FSL_I2C_DFSRR register offset Sascha Hauer
2019-03-04 9:18 ` [PATCH 04/10] i2c: i.MX: remove unnecessary ifdef Sascha Hauer
2019-03-04 9:18 ` [PATCH 05/10] i2c: i.MX: Consolidate status polling loops Sascha Hauer
2019-03-04 9:18 ` [PATCH 06/10] i2c: i.MX: stop after read only in last transfer of a message Sascha Hauer
2019-03-04 9:18 ` [PATCH 07/10] i2c: i.MX: remove unused define Sascha Hauer
2019-03-04 9:18 ` Sascha Hauer [this message]
2019-03-04 9:18 ` [PATCH 09/10] i2c: i.MX: Create header file for register defines Sascha Hauer
2019-03-04 9:18 ` [PATCH 10/10] i2c: i.MX: Add early driver for use in PBL Sascha Hauer
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