From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lee Jones Subject: [PATCH 3/3] i2c: nomadik: Add Device Tree support to the Nomadik I2C driver Date: Thu, 23 Aug 2012 16:01:27 +0100 Message-ID: <1345734087-21803-3-git-send-email-lee.jones@linaro.org> References: <1345734087-21803-1-git-send-email-lee.jones@linaro.org> Return-path: In-Reply-To: <1345734087-21803-1-git-send-email-lee.jones@linaro.org> Sender: linux-kernel-owner@vger.kernel.org To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: STEricsson_nomadik_linux@list.st.com, linus.walleij@stericsson.com, arnd@arndb.de, w.sang@pengutronix.de, Lee Jones , linux-i2c@vger.kernel.org List-Id: linux-i2c@vger.kernel.org Here we apply the bindings required for successful Device Tree probing of the i2c-nomadik driver. Cc: linux-i2c@vger.kernel.org Acked-by: srinidhi kasagar Signed-off-by: Lee Jones --- drivers/i2c/busses/i2c-nomadik.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c index 61b00ed..8168389 100644 --- a/drivers/i2c/busses/i2c-nomadik.c +++ b/drivers/i2c/busses/i2c-nomadik.c @@ -25,6 +25,7 @@ #include #include #include +#include #define DRIVER_NAME "nmk-i2c" @@ -920,15 +921,42 @@ static struct nmk_i2c_controller u8500_i2c = { .sm = I2C_FREQ_MODE_FAST, }; +static void nmk_i2c_of_probe(struct device_node *np, + struct nmk_i2c_controller *pdata) +{ + /* Provide the default configuration as a base. */ + pdata = &u8500_i2c; + + of_property_read_u32(np, "clock-frequency", (u32*)&pdata->clk_freq); + + /* This driver only supports 'standard' and 'fast' modes of operation. */ + if (pdata->clk_freq <= 100000) + pdata->sm = I2C_FREQ_MODE_STANDARD; + else + pdata->sm = I2C_FREQ_MODE_FAST; +} + static atomic_t adapter_id = ATOMIC_INIT(0); static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id) { int ret = 0; struct nmk_i2c_controller *pdata = adev->dev.platform_data; + struct device_node *np = adev->dev.of_node; struct nmk_i2c_dev *dev; struct i2c_adapter *adap; + if (np) { + if (!pdata) { + pdata = devm_kzalloc(&adev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) { + ret = -ENOMEM; + goto err_no_mem; + } + } + nmk_i2c_of_probe(np, pdata); + } + if (!pdata) /* No i2c configuration found, using the default. */ pdata = &u8500_i2c; -- 1.7.9.5