From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Shevchenko Subject: [PATCH v1 32/40] i2c: stm32f4: Use generic definitions for bus frequencies Date: Mon, 24 Feb 2020 17:15:22 +0200 Message-ID: <20200224151530.31713-32-andriy.shevchenko@linux.intel.com> References: <20200224151530.31713-1-andriy.shevchenko@linux.intel.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: Received: from mga09.intel.com ([134.134.136.24]:62976 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728011AbgBXPPq (ORCPT ); Mon, 24 Feb 2020 10:15:46 -0500 In-Reply-To: <20200224151530.31713-1-andriy.shevchenko@linux.intel.com> Sender: linux-i2c-owner@vger.kernel.org List-Id: linux-i2c@vger.kernel.org To: Wolfram Sang , linux-i2c@vger.kernel.org Cc: Andy Shevchenko , Pierre-Yves MORDRET , Maxime Coquelin , Alexandre Torgue Since we have generic definitions for bus frequencies, let's use them. Cc: Pierre-Yves MORDRET Cc: Maxime Coquelin Cc: Alexandre Torgue Signed-off-by: Andy Shevchenko --- drivers/i2c/busses/i2c-stm32f4.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/drivers/i2c/busses/i2c-stm32f4.c b/drivers/i2c/busses/i2c-stm32f4.c index ba600d77a3f8..0a67b44f2755 100644 --- a/drivers/i2c/busses/i2c-stm32f4.c +++ b/drivers/i2c/busses/i2c-stm32f4.c @@ -91,7 +91,6 @@ #define STM32F4_I2C_MIN_STANDARD_FREQ 2U #define STM32F4_I2C_MIN_FAST_FREQ 6U #define STM32F4_I2C_MAX_FREQ 46U -#define HZ_TO_MHZ 1000000 /** * struct stm32f4_i2c_msg - client specific data @@ -154,7 +153,7 @@ static int stm32f4_i2c_set_periph_clk_freq(struct stm32f4_i2c_dev *i2c_dev) u32 cr2 = 0; i2c_dev->parent_rate = clk_get_rate(i2c_dev->clk); - freq = DIV_ROUND_UP(i2c_dev->parent_rate, HZ_TO_MHZ); + freq = DIV_ROUND_UP(i2c_dev->parent_rate, HZ_PER_MHZ); if (i2c_dev->speed == STM32_I2C_SPEED_STANDARD) { /* @@ -190,7 +189,7 @@ static int stm32f4_i2c_set_periph_clk_freq(struct stm32f4_i2c_dev *i2c_dev) static void stm32f4_i2c_set_rise_time(struct stm32f4_i2c_dev *i2c_dev) { - u32 freq = DIV_ROUND_UP(i2c_dev->parent_rate, HZ_TO_MHZ); + u32 freq = DIV_ROUND_UP(i2c_dev->parent_rate, HZ_PER_MHZ); u32 trise; /* @@ -243,7 +242,7 @@ static void stm32f4_i2c_set_speed_mode(struct stm32f4_i2c_dev *i2c_dev) * parent rate is not higher than 46 MHz . As a result val * is at most 8 bits wide and so fits into the CCR bits [11:0]. */ - val = i2c_dev->parent_rate / (100000 << 1); + val = i2c_dev->parent_rate / (I2C_STANDARD_MODE_FREQ << 1); } else { /* * In fast mode, we compute CCR with duty = 0 as with low @@ -263,7 +262,7 @@ static void stm32f4_i2c_set_speed_mode(struct stm32f4_i2c_dev *i2c_dev) * parent rate is not higher than 46 MHz . As a result val * is at most 6 bits wide and so fits into the CCR bits [11:0]. */ - val = DIV_ROUND_UP(i2c_dev->parent_rate, 400000 * 3); + val = DIV_ROUND_UP(i2c_dev->parent_rate, I2C_FAST_MODE_FREQ * 3); /* Select Fast mode */ ccr |= STM32F4_I2C_CCR_FS; @@ -807,7 +806,7 @@ static int stm32f4_i2c_probe(struct platform_device *pdev) i2c_dev->speed = STM32_I2C_SPEED_STANDARD; ret = of_property_read_u32(np, "clock-frequency", &clk_rate); - if (!ret && clk_rate >= 400000) + if (!ret && clk_rate >= I2C_FAST_MODE_FREQ) i2c_dev->speed = STM32_I2C_SPEED_FAST; i2c_dev->dev = &pdev->dev; -- 2.25.0