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Fri, 2 Oct 2020 12:22:55 +0000 (GMT) From: =?utf-8?q?=C5=81ukasz_Stelmach?= To: Kukjin Kim , Krzysztof Kozlowski , Tomasz Figa , Andi Shyti , Mark Brown , linux-spi@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Marek Szyprowski , =?utf-8?q?Bart=C5=82omiej?= =?utf-8?b?IMW7b8WCbmllcmtpZXdpY3o=?= , =?utf-8?q?=C5=81ukasz_Stelmach?= Subject: [PATCH v3 7/9] spi: spi-s3c64xx: Ensure cur_speed holds actual clock value Date: Fri, 2 Oct 2020 14:22:41 +0200 Message-Id: <20201002122243.26849-8-l.stelmach@samsung.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201002122243.26849-1-l.stelmach@samsung.com> MIME-Version: 1.0 Organization: Samsung R&D Institute Poland X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrJKsWRmVeSWpSXmKPExsWy7djPc7rzpcvjDbZ1KVss/vGcyWLjjPWs FlMfPmGz6H/8mtni/PkN7BY3D61gtNj0+BqrxeVdc9gsZpzfx2TR+PEmu8XaI3fZLVbt+sPo wONxfcknZo+ds+6ye2xa1cnmsXlJvUffllWMHp83yQWwRXHZpKTmZJalFunbJXBlTF2fW9DH UXFm5k+2BsYnbF2MnBwSAiYSl/6fYe1i5OIQEljBKDH7zho2COcLo8TBUz8YIZzPjBJzDn1g hGnZfLSdHcQWEljOKPFsFj9E0XNGif0bIIrYBBwl+peeAJsrIrCdSWLi5/MsIA6zwFFGic0P rrKAVAkLhEp83HUcrINFQFWit/UqUxcjBwevgLVE04Y6iG3yEu3Lt4MdyylgI3Fy0TYwm1dA UOLkzCdgY/gFtCTWNF0Hs5mB6pu3zmYG2SUhcI9dovvvYbCZEgIuEh+fFkLMFJZ4dXwLO4Qt I/F/53yoknqJyZPMIFp7GCW2zfnBAlFjLXHn3C82kBpmAU2J9bv0IcKOEtvuTYZq5ZO48VYQ 4gI+iUnbpjNDhHklOtqEIKpVJNb174EaKCXR+2oF4wRGpVlIfpmF5P5ZCLsWMDKvYhRPLS3O TU8tNsxLLdcrTswtLs1L10vOz93ECExQp/8d/7SD8eulpEOMAhyMSjy8GYdK44VYE8uKK3MP MUpwMCuJ8DqdPR0nxJuSWFmVWpQfX1Sak1p8iFGag0VJnNd40ctYIYH0xJLU7NTUgtQimCwT B6dUA2OO5/rF9s9rj0Z4ZZ33Lt7RZCLZuq0m78qttofWd1R7lx/d8Sh8LtvMfxsnBYWLPpq+ 9IE51/znltxTvW7a2VVuXLTsTa3anLqDZYvvVc+NVqn9k61/YcoVDs9v158L9c7hqEnd/VXw l19TXu6BJcWKPq9+y714xpm6v9Wjdcm+VIuIPM3jNgVKLMUZiYZazEXFiQBkK4k4TAMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrNIsWRmVeSWpSXmKPExsVy+t/xu7rzpcvjDQ6d5bdY/OM5k8XGGetZ LaY+fMJm0f/4NbPF+fMb2C1uHlrBaLHp8TVWi8u75rBZzDi/j8mi8eNNdou1R+6yW6za9YfR gcfj+pJPzB47Z91l99i0qpPNY/OSeo++LasYPT5vkgtgi9KzKcovLUlVyMgvLrFVija0MNIz tLTQMzKx1DM0No+1MjJV0rezSUnNySxLLdK3S9DLmLo+t6CPo+LMzJ9sDYxP2LoYOTkkBEwk Nh9tZ+9i5OIQEljKKLF77X8ghwMoISWxcm46RI2wxJ9rXWwQNU8ZJfa27mQFSbAJOEr0Lz3B CpIQEdjPJHHpwn0WEIdZ4DCjxOV165hAqoQFgiU6vnezgNgsAqoSva1XmUA28ApYSzRtqIPY IC/Rvnw72EWcAjYSJxdtA7OFgEpaP84FW8YrIChxcuYTFpBWZgF1ifXzhEDC/AJaEmuaroNN ZwYa07x1NvMERqFZSDpmIXTMQlK1gJF5FaNIamlxbnpusZFecWJucWleul5yfu4mRmBEbjv2 c8sOxq53wYcYBTgYlXh4BQ6UxguxJpYVV+YeYpTgYFYS4XU6ezpOiDclsbIqtSg/vqg0J7X4 EKMp0JcTmaVEk/OBySKvJN7Q1NDcwtLQ3Njc2MxCSZy3Q+BgjJBAemJJanZqakFqEUwfEwen VAPjqsLzn6/Jevet6HJ+yzF/avxVnrCKKT/+G9SVmTxML2b8+ufVLCfvZKNrzclfy3YujdXw Xv/R/V/v1YUFNzlX82vLbvnF/3iJU+ieuFV/HTniF7Vq7N/JlDS9QIll7sNdFuv65GRbFiy4 dUqwdUcXt13U49iw00LP50WuOsabxfdyWXG5odpLJZbijERDLeai4kQAd2m5jt4CAAA= X-CMS-MailID: 20201002122255eucas1p21976a8ba0566564b79a9dd6f62cd4caf X-Msg-Generator: CA X-RootMTR: 20201002122255eucas1p21976a8ba0566564b79a9dd6f62cd4caf X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20201002122255eucas1p21976a8ba0566564b79a9dd6f62cd4caf References: <20201002122243.26849-1-l.stelmach@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org Make sure the cur_speed value used in s3c64xx_enable_datapath() to configure DMA channel and in s3c64xx_wait_for_*() to calculate the transfer timeout is set to the actual value of (half) the clock speed. Don't change non-CMU case, because no frequency calculation errors have been reported. Reviewed-by: Krzysztof Kozlowski Suggested-by: Tomasz Figa Signed-off-by: Łukasz Stelmach --- drivers/spi/spi-s3c64xx.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index f85f40fd608c..0bd3e230350c 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -626,6 +626,7 @@ static int s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd) ret = clk_set_rate(sdd->src_clk, sdd->cur_speed * 2); if (ret) return ret; + sdd->cur_speed = clk_get_rate(sdd->src_clk) / 2; } else { /* Configure Clock */ val = readl(regs + S3C64XX_SPI_CLK_CFG);