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[144.168.56.201]) by smtp.gmail.com with ESMTPSA id l141sm3593938pfd.124.2021.01.12.06.55.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Jan 2021 06:55:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=dUq4A654ZKmWVdTONfz5D26WNlkMJCt4bN5UkLrjKbg=; b=jSkw+6YEVqEEyeQ0O3nuUZ9msOUgFm3uzG1/Toks1srZfR2JWS8nJtKkekVfx1ypa1 ume9rwehUhm+WVDcUS49xti1N7yFAkDXPVpRSnHEA8KdPZsWzQejwujF3XuiQYxcWJQN Gil0Cv0KP+OG3O8OFJsA374WKvuFB2PQWTmeevfnJlSGr/4MwkongIKHbF13Jog5m9yn vazZIYNCeVvtdXN2jJl7/7JlGf9gPpogIb4x0WwSeVqJ/zlvd0rsTTzOE1yuPQPR88vm xkPdVQ/qP4l6natwU/zzPM4g2YXi4tOo+5Xg6w4mU1t5KuvVQnYTrq/SKGSdDgSSRriI nT4g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=dUq4A654ZKmWVdTONfz5D26WNlkMJCt4bN5UkLrjKbg=; b=ryHbSwhExyBsyqG8BCSwv32sy825R7o1vJRyFijRgM+yZHZiGeAfdT98DyfCIhoR9l oG2Ae/Gck0qvXcmasRoFSsqcWKMeLrWbNAunRRY5U/JRKC7YEdIUx9rUv+t8tuaR0js9 s+qV1qFy4tJuZnX1pj4ch6f+vDo9oGbWLnGlOR7Ntga8ThpQgtm7t5MU7VH1Yb4TbJad CIea9KiI0yca82X+R1b9qsftyOxSOoLn+OYvYBu7dKFJMXY3hfrER3OEE5z2OMFX8TEb y1ahSP76nc+G4OzIlwfiEQJtRd4aEqvEq6wJTCzYEXRFdokKJO/TScXKiPJj735GcfHr HqdA== X-Gm-Message-State: AOAM531bXMhYVWcxkDDAZVxGKgKNxTfcBEC8PctDPF5Bi9NWDuacz8ma A+AGWJntfBOq2O72iZ+HPm4= X-Google-Smtp-Source: ABdhPJyPWmCUc8IKTLSJeKabospcV+9a3w3RoWd34wr7VUHEIKxpWrcE7CyvHmKAaZYXnMaFX3XFPQ== X-Received: by 2002:aa7:947c:0:b029:1a5:dece:c07f with SMTP id t28-20020aa7947c0000b02901a5decec07fmr4843278pfq.47.1610463351971; Tue, 12 Jan 2021 06:55:51 -0800 (PST) From: Bin Meng To: Peter Maydell , Jean-Christophe Dubois , Alistair Francis , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , qemu-arm@nongnu.org, qemu-devel@nongnu.org Subject: [PATCH v5 4/6] hw/ssi: imx_spi: Round up the burst length to be multiple of 8 Date: Tue, 12 Jan 2021 22:55:24 +0800 Message-Id: <20210112145526.31095-5-bmeng.cn@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210112145526.31095-1-bmeng.cn@gmail.com> References: <20210112145526.31095-1-bmeng.cn@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::536; envelope-from=bmeng.cn@gmail.com; helo=mail-pg1-x536.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Bin Meng Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @gmail.com) Content-Type: text/plain; charset="utf-8" From: Bin Meng Current implementation of the imx spi controller expects the burst length to be multiple of 8, which is the most common use case. In case the burst length is not what we expect, log it to give user a chance to notice it, and round it up to be multiple of 8. Signed-off-by: Bin Meng --- Changes in v5: - round up the burst length to be multiple of 8 Changes in v4: - s/normal/common/ in the commit message - log the burst length value in the log message Changes in v3: - new patch: log unimplemented burst length hw/ssi/imx_spi.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/hw/ssi/imx_spi.c b/hw/ssi/imx_spi.c index 880939f595..b7456de065 100644 --- a/hw/ssi/imx_spi.c +++ b/hw/ssi/imx_spi.c @@ -128,7 +128,20 @@ static uint8_t imx_spi_selected_channel(IMXSPIState *s) =20 static uint32_t imx_spi_burst_length(IMXSPIState *s) { - return EXTRACT(s->regs[ECSPI_CONREG], ECSPI_CONREG_BURST_LENGTH) + 1; + uint32_t burst; + + burst =3D EXTRACT(s->regs[ECSPI_CONREG], ECSPI_CONREG_BURST_LENGTH) + = 1; + if (burst % 8) { + qemu_log_mask(LOG_UNIMP, + "[%s]%s: burst length (%d) not multiple of 8!\n", + TYPE_IMX_SPI, __func__, burst); + burst =3D ROUND_UP(burst, 8); + qemu_log_mask(LOG_UNIMP, + "[%s]%s: burst length rounded up to %d; this may not= work.\n", + TYPE_IMX_SPI, __func__, burst); + } + + return burst; } =20 static bool imx_spi_is_enabled(IMXSPIState *s) --=20 2.25.1