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[2003:dc:d732:f500:7de1:8da1:f72f:f8d9]) by smtp.googlemail.com with ESMTPSA id x14sm29755554wrm.65.2018.11.22.13.40.23 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 22 Nov 2018 13:40:24 -0800 (PST) From: Martin Blumenstingl To: linux-amlogic@lists.infradead.org, narmstrong@baylibre.com, jbrunet@baylibre.com Subject: [PATCH v2 0/4] Meson8b: add the CPU clock post-dividers Date: Thu, 22 Nov 2018 22:40:13 +0100 Message-Id: <20181122214017.25643-1-martin.blumenstingl@googlemail.com> X-Mailer: git-send-email 2.19.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181122_134037_289487_B576DA8E X-CRM114-Status: GOOD ( 11.37 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: sboyd@kernel.org, mturquette@baylibre.com, linux-kernel@vger.kernel.org, Martin Blumenstingl , linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+patchwork-linux-amlogic=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This is the successor to my previous series "meson8b: add the CPU_DIV16 clock for the ARM TWD" from [0]. I decided to not send this as v2 of the original series because the PERIPH clock is not the CPU_DIV16 clock. It's not clear whether a CPU_DIV16 clock exists. With this series we get all the CPU_CLK post-dividers as listed in the public S805 datasheet [1] on pages 31 and 32: - ABP - PERIPH (used as input for the ARM global timer and ARM TWD timer) - AXI - L2 DRAM Each of these clocks has a register called "..._CLK_DIS" which is documented as a "just in case" bit: "Set to 1 to manually disable the [...] clock when changing the mux selection. Typically this bit is set to 0 since the clock muxes can switch without glitches." Since we're not supposed to touch that register we're using the new read-only gate clk_ops to ensure that nothing accidentally modifies these bits. The result of this is that we can use the PERIPH clock which clocks the ARM TWD timer. I will send a separate series to add the TWD timer. changes since v1 at [2]: - added new patch 2 "clk: meson: clk-regmap: add read-only gate ops" - switched from CLK_IS_CRITICAL to the new clk_regmap_gate_ro_ops so we're consistent with all other read-only clocks - collected Jerome's Acked-by tags (thanks!) [0] http://lists.infradead.org/pipermail/linux-amlogic/2018-July/007890.html [1] https://dn.odroid.com/S805/Datasheet/S805_Datasheet%20V0.8%2020150126.pdf [2] https://patchwork.kernel.org/cover/10687023/ Martin Blumenstingl (4): dt-bindings: clock: meson8b: export the CPU post dividers clk: meson: clk-regmap: add read-only gate ops clk: meson: meson8b: rename cpu_div2/cpu_div3 to cpu_in_div2/cpu_in_div3 clk: meson: meson8b: add the CPU clock post divider clocks drivers/clk/meson/clk-regmap.c | 5 + drivers/clk/meson/clk-regmap.h | 1 + drivers/clk/meson/meson8b.c | 264 ++++++++++++++++++++++- drivers/clk/meson/meson8b.h | 17 +- include/dt-bindings/clock/meson8b-clkc.h | 4 + 5 files changed, 278 insertions(+), 13 deletions(-)