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path: root/drivers/clk/pistachio
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2015-08-26clk: pistachio: correct critical clock listDamien.Horsley
Current critical clock list for pistachio enables only mips and sys clocks by default but there are also other clocks that are not claimed by anyone and needs to be enabled by default. This patch updates the critical clocks that need to be enabled by default. Add a separate struct to distinguish the critical clocks as listed: 1.) core clocks: a.) mips clock 2.) peripheral system clocks: a.) sys clock b.) sys_bus clock c.) DDR clock d.) ROM clock Fixes: b35d7c33419c("CLK: Pistachio: Register core clocks") Cc: <stable@vger.kernel.org> # 4.1 Reviewed-by: Andrew Bresticker <abrestic@chromium.org> Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com> Signed-off-by: Damien.Horsley <Damien.Horsley@imgtec.com> Signed-off-by: Govindraj Raja <govindraj.raja@imgtec.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-08-26clk: pistachio: Fix PLL rate calculation in integer modeZdenko Pulitika
.recalc_rate callback for the fractional PLL doesn't take operating mode into account when calculating PLL rate. This results in the incorrect PLL rates when PLL is operating in integer mode. Operating mode of fractional PLL is based on the value of the fractional divider. Currently it assumes that the PLL will always be configured in fractional mode which may not be the case. This may result in the wrong output frequency. Also vco was calculated based on the current operating mode which makes no sense because .set_rate is setting operating mode. Instead, vco should be calculated using PLL settings that are about to be set. Fixes: 43049b0c83f17("CLK: Pistachio: Add PLL driver") Cc: <stable@vger.kernel.org> # 4.1 Reviewed-by: Andrew Bresticker <abrestic@chromium.org> Signed-off-by: Zdenko Pulitika <zdenko.pulitika@imgtec.com> Signed-off-by: Govindraj Raja <govindraj.raja@imgtec.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-08-26clk: pistachio: Fix override of clk-pll settings from boot loaderZdenko Pulitika
PLL enable callbacks are overriding PLL mode (int/frac) and Noise reduction (on/off) settings set by the boot loader which results in the incorrect clock rate. PLL mode and noise reduction are defined by the DSMPD and DACPD bits of the PLL control register. PLL .enable() callbacks enable PLL by deasserting all power-down bits of the PLL control register, including DSMPD and DACPD bits, which is not necessary since these bits don't actually enable/disable PLL. This commit fixes the problem by removing DSMPD and DACPD bits from the "PLL enable" mask. Fixes: 43049b0c83f17("CLK: Pistachio: Add PLL driver") Cc: <stable@vger.kernel.org> # 4.1 Reviewed-by: Andrew Bresitcker <abrestic@chromium.org> Signed-off-by: Zdenko Pulitika <zdenko.pulitika@imgtec.com> Signed-off-by: Govindraj Raja <govindraj.raja@imgtec.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-08-26clk: pistachio: Fix 32bit integer overflowsZdenko Pulitika
This commit fixes 32bit integer overflows throughout the pll driver (i.e. wherever the result of integer multiplication may exceed the range of u32). One of the functions affected by this problem is .recalc_rate. It returns incorrect rate for some pll settings (not for all though) which in turn results in the incorrect rate setup of pll's child clocks. Fixes: 43049b0c83f17("CLK: Pistachio: Add PLL driver") Cc: <stable@vger.kernel.org> # 4.1 Reviewed-by: Andrew Bresticker <abrestic@chromium.org> Signed-off-by: Zdenko Pulitika <zdenko.pulitika@imgtec.com> Signed-off-by: Govindraj Raja <govindraj.raja@imgtec.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-08-24clk: Convert __clk_get_name(hw->clk) to clk_hw_get_name(hw)Stephen Boyd
Use the provider based method to get a clock's name so that we can get rid of the clk member in struct clk_hw one day. Mostly converted with the following coccinelle script. @@ struct clk_hw *E; @@ -__clk_get_name(E->clk) +clk_hw_get_name(E) Acked-by: Heiko Stuebner <heiko@sntech.de> Cc: Sylwester Nawrocki <s.nawrocki@samsung.com> Cc: Tomasz Figa <tomasz.figa@gmail.com> Cc: Peter De Schrijver <pdeschrijver@nvidia.com> Cc: Prashant Gaikwad <pgaikwad@nvidia.com> Cc: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Thierry Reding <treding@nvidia.com> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Tero Kristo <t-kristo@ti.com> Cc: Ulf Hansson <ulf.hansson@linaro.org> Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Acked-by: Andrew Bresticker <abrestic@chromium.org> Cc: Ezequiel Garcia <ezequiel.garcia@imgtec.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kevin Cernekee <cernekee@chromium.org> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Ulrich Hecht <ulrich.hecht+renesas@gmail.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-rockchip@lists.infradead.org Cc: linux-samsung-soc@vger.kernel.org Cc: linux-tegra@vger.kernel.org Cc: linux-omap@vger.kernel.org Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-07-20clk: pistachio: Include clk.hStephen Boyd
This clock provider uses the consumer API, so include clk.h explicitly. Cc: Andrew Bresticker <abrestic@chromium.org> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-06-04clk: pistachio: Add sanity checks on PLL configurationKevin Cernekee
When setting the PLL rates, check that: - VCO is within range - PFD is within range - PLL is disabled when postdiv is changed - postdiv2 <= postdiv1 Reviewed-by: Andrew Bresticker <abrestic@chromium.org> Signed-off-by: Kevin Cernekee <cernekee@chromium.org> Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-06-04clk: pistachio: Lock the PLL when enabled upon rate changeEzequiel Garcia
Currently, when the rate is changed, the driver makes sure the PLL is enabled before doing so. This is done because the PLL cannot be locked while disabled. Once locked, the drivers returns the PLL to its previous enable/disable state. This is a bit cumbersome, and can be simplified. This commit reworks the .set_rate() functions for the integer and fractional PLLs. Upon rate change, the PLL is now locked only if it's already enabled. Also, the driver locks the PLL on .enable(). This makes sure the PLL is locked when enabled, and not locked when disabled. Signed-off-by: Andrew Bresticker <abrestic@chromium.org> Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-06-04clk: pistachio: Add a pll_lock() helper for clarityEzequiel Garcia
This commit adds a pll_lock() helper making the code more readable. Cosmetic change only, no functionality changes. Signed-off-by: Andrew Bresticker <abrestic@chromium.org> Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-03-31CLK: Pistachio: Register external clock gatesAndrew Bresticker
Register the clock gates for the external audio and ethernet reference clocks provided by the top-level general control block. Signed-off-by: Damien Horsley <Damien.Horsley@imgtec.com> Signed-off-by: Andrew Bresticker <abrestic@chromium.org> Cc: Mike Turquette <mturquette@linaro.org> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: devicetree@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Cc: Ezequiel Garcia <ezequiel.garcia@imgtec.com> Cc: James Hartley <james.hartley@imgtec.com> Cc: James Hogan <james.hogan@imgtec.com> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Patchwork: https://patchwork.linux-mips.org/patch/9321/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-03-31CLK: Pistachio: Register system interface gate clocksAndrew Bresticker
Register the system interface gate clocks provided by the peripheral general control block. These clocks gate register access for various peripherals. Signed-off-by: Damien Horsley <Damien.Horsley@imgtec.com> Signed-off-by: Andrew Bresticker <abrestic@chromium.org> Cc: Mike Turquette <mturquette@linaro.org> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: devicetree@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Cc: Ezequiel Garcia <ezequiel.garcia@imgtec.com> Cc: James Hartley <james.hartley@imgtec.com> Cc: James Hogan <james.hogan@imgtec.com> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Patchwork: https://patchwork.linux-mips.org/patch/9322/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-03-31CLK: Pistachio: Register peripheral clocksAndrew Bresticker
Register the clocks generated by the peripheral clock controller. This includes the clocks for several peripherals, including I2C, PWM, watchdog, and timer. Signed-off-by: Damien Horsley <Damien.Horsley@imgtec.com> Signed-off-by: Andrew Bresticker <abrestic@chromium.org> Cc: Mike Turquette <mturquette@linaro.org> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: devicetree@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Cc: Ezequiel Garcia <ezequiel.garcia@imgtec.com> Cc: James Hartley <james.hartley@imgtec.com> Cc: James Hogan <james.hogan@imgtec.com> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Patchwork: https://patchwork.linux-mips.org/patch/9320/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-03-31CLK: Pistachio: Register core clocksAndrew Bresticker
Register the clocks generated by the core clock controller. This includes the 7 PLLs and clocks for the CPU, RPU co-processor, audio, WiFi, bluetooth, and several other peripherals. The MIPS and PERIPH_SYS clocks must remain enabled at all times. Signed-off-by: Damien Horsley <Damien.Horsley@imgtec.com> Signed-off-by: Andrew Bresticker <abrestic@chromium.org> Cc: Mike Turquette <mturquette@linaro.org> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: devicetree@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Cc: Ezequiel Garcia <ezequiel.garcia@imgtec.com> Cc: James Hartley <james.hartley@imgtec.com> Cc: James Hogan <james.hogan@imgtec.com> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Patchwork: https://patchwork.linux-mips.org/patch/9317/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-03-31CLK: Pistachio: Add PLL driverAndrew Bresticker
Add a driver for the integer (GF40LP_LAINT) and fractional (GF40LP_FRAC) PLLs present on Pistachio. Signed-off-by: Andrew Bresticker <abrestic@chromium.org> Cc: Mike Turquette <mturquette@linaro.org> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: devicetree@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Cc: Ezequiel Garcia <ezequiel.garcia@imgtec.com> Cc: James Hartley <james.hartley@imgtec.com> Cc: James Hogan <james.hogan@imgtec.com> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Patchwork: https://patchwork.linux-mips.org/patch/9316/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-03-31CLK: Add basic infrastructure for Pistachio clocksAndrew Bresticker
Add helpers for registering clocks and clock providers on Pistachio. Signed-off-by: Andrew Bresticker <abrestic@chromium.org> Cc: Mike Turquette <mturquette@linaro.org> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: devicetree@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Cc: Ezequiel Garcia <ezequiel.garcia@imgtec.com> Cc: James Hartley <james.hartley@imgtec.com> Cc: James Hogan <james.hogan@imgtec.com> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Patchwork: https://patchwork.linux-mips.org/patch/9318/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>