diff options
| author | Chaitanya Bandi <bandik@nvidia.com> | 2014-03-24 14:34:46 +0530 |
|---|---|---|
| committer | Laxman Dewangan <ldewangan@nvidia.com> | 2014-03-25 05:11:58 -0700 |
| commit | 058dbe754e4256d57075e083545c41d4db86020c (patch) | |
| tree | 92e860fbba87ef8af14fe6cde1a4f5c0cca8f543 /drivers/i2c | |
| parent | 8bdc2b4e4d2d3756c1172c243a10496d18d2dff9 (diff) | |
i2c: tegra: Set pinctrl drive settings dynamically for HS mode
Added support for setting pinctrl drive settings
dynamically during boot in case a controller is
configured to operate in HS mode.
Bug 1396451
Change-Id: I6f2fd88d6f0263423e32f0cdcb54e8e89324a409
Signed-off-by: Chaitanya Bandi <bandik@nvidia.com>
Reviewed-on: http://git-master/r/385532
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-tegra.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index 64ad72cd940d..66aabc0e3666 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -40,6 +40,7 @@ #include <linux/spinlock.h> #include <linux/clk/tegra.h> #include <linux/tegra-pm.h> +#include <linux/pinctrl/consumer.h> #include <asm/unaligned.h> @@ -1470,6 +1471,8 @@ static int tegra_i2c_probe(struct platform_device *pdev) const struct tegra_i2c_chipdata *chip_data = NULL; const struct of_device_id *match; int bus_num = -1; + struct pinctrl *pin; + struct pinctrl_state *s; if (pdev->dev.of_node) { match = of_match_device(of_match_ptr(tegra_i2c_of_match), &pdev->dev); @@ -1545,6 +1548,26 @@ static int tegra_i2c_probe(struct platform_device *pdev) i2c_dev->dvfs_soc_clk = dvfs_soc_clk; } + if (pdata->is_high_speed_enable) { + pin = devm_pinctrl_get(&pdev->dev); + if (IS_ERR(pin)) { + dev_warn(&pdev->dev, "Missing pinctrl device\n"); + goto skip_pinctrl; + } + + s = pinctrl_lookup_state(pin, "hs_mode"); + if (IS_ERR(s)) { + dev_warn(&pdev->dev, "Missing hs_mode state\n"); + goto skip_pinctrl; + } + + ret = pinctrl_select_state(pin, s); + if (ret < 0) + dev_err(&pdev->dev, "setting state failed\n"); + } + +skip_pinctrl: + i2c_dev->base = base; i2c_dev->div_clk = div_clk; if (i2c_dev->chipdata->has_fast_clock) |