From: Jarkko Nikula <jarkko.nikula@linux.intel.com>
To: linux-i2c@vger.kernel.org
Cc: Wolfram Sang <wsa@the-dreams.de>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Weifeng Voon <weifeng.voon@intel.com>,
Jarkko Nikula <jarkko.nikula@linux.intel.com>
Subject: [PATCH 2/8] i2c: designware: get fast plus and high speed *CNT configuration
Date: Fri, 12 Aug 2016 17:02:48 +0300 [thread overview]
Message-ID: <1471010574-28598-3-git-send-email-jarkko.nikula@linux.intel.com> (raw)
In-Reply-To: <1471010574-28598-1-git-send-email-jarkko.nikula@linux.intel.com>
From: Weifeng Voon <weifeng.voon@intel.com>
I2C designware controller can run at fast mode plus and high speed. This
patch adds the capability to get the HCNT, LCNT configuration via
FPCN (fast plus) and HSCN (high speed) ACPI method.
Signed-off-by: Weifeng Voon <weifeng.voon@intel.com>
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
---
drivers/i2c/busses/i2c-designware-core.h | 8 ++++++++
drivers/i2c/busses/i2c-designware-platdrv.c | 2 ++
2 files changed, 10 insertions(+)
diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h
index 63f6d4acee39..84866db2d04f 100644
--- a/drivers/i2c/busses/i2c-designware-core.h
+++ b/drivers/i2c/busses/i2c-designware-core.h
@@ -62,6 +62,10 @@
* @ss_lcnt: standard speed LCNT value
* @fs_hcnt: fast speed HCNT value
* @fs_lcnt: fast speed LCNT value
+ * @fp_hcnt: fast plus HCNT value
+ * @fp_lcnt: fast plus LCNT value
+ * @hs_hcnt: high speed HCNT value
+ * @hs_lcnt: high speed LCNT value
* @acquire_lock: function to acquire a hardware lock on the bus
* @release_lock: function to release a hardware lock on the bus
* @pm_runtime_disabled: true if pm runtime is disabled
@@ -105,6 +109,10 @@ struct dw_i2c_dev {
u16 ss_lcnt;
u16 fs_hcnt;
u16 fs_lcnt;
+ u16 fp_hcnt;
+ u16 fp_lcnt;
+ u16 hs_hcnt;
+ u16 hs_lcnt;
int (*acquire_lock)(struct dw_i2c_dev *dev);
void (*release_lock)(struct dw_i2c_dev *dev);
bool pm_runtime_disabled;
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 1608cf4d3263..cbe4fb31cb4b 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -107,6 +107,8 @@ static int dw_i2c_acpi_configure(struct platform_device *pdev)
dw_i2c_acpi_params(pdev, "SSCN", &dev->ss_hcnt, &dev->ss_lcnt, NULL);
dw_i2c_acpi_params(pdev, "FMCN", &dev->fs_hcnt, &dev->fs_lcnt,
&dev->sda_hold_time);
+ dw_i2c_acpi_params(pdev, "FPCN", &dev->fp_hcnt, &dev->fp_lcnt, NULL);
+ dw_i2c_acpi_params(pdev, "HSCN", &dev->hs_hcnt, &dev->hs_lcnt, NULL);
id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
if (id && id->driver_data)
--
2.8.1
next prev parent reply other threads:[~2016-08-12 14:03 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-12 14:02 [PATCH 0/8] i2c: designware: Support fast mode plus and high speed Jarkko Nikula
2016-08-12 14:02 ` [PATCH 1/8] i2c: designware: Move clk_freq into struct dw_i2c_dev Jarkko Nikula
2016-08-12 14:02 ` Jarkko Nikula [this message]
2016-08-12 14:02 ` [PATCH 3/8] i2c: designware: Enable fast mode plus Jarkko Nikula
2016-08-12 14:02 ` [PATCH 4/8] i2c: designware: set the common config before the if else Jarkko Nikula
2016-08-12 14:02 ` [PATCH 5/8] i2c: designware: Enable high speed mode Jarkko Nikula
2016-08-12 14:02 ` [PATCH 6/8] i2c: core: Cleanup I2C ACPI namespace, take 2 Jarkko Nikula
2016-08-12 14:02 ` [PATCH 7/8] i2c: core: Add function for finding the bus speed from ACPI, " Jarkko Nikula
2016-08-12 14:02 ` [PATCH 8/8] i2c: designware: Find bus speed from ACPI Jarkko Nikula
2016-08-17 16:53 ` [PATCH 0/8] i2c: designware: Support fast mode plus and high speed Andy Shevchenko
2016-08-25 19:55 ` Wolfram Sang
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