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From: Sowjanya Komatineni <skomatineni@nvidia.com>
To: Dmitry Osipenko <digetx@gmail.com>, <thierry.reding@gmail.com>,
	<jonathanh@nvidia.com>, <broonie@kernel.org>,
	<lgirdwood@gmail.com>, <perex@perex.cz>, <tiwai@suse.com>,
	<mperttunen@nvidia.com>, <gregkh@linuxfoundation.org>,
	<sboyd@kernel.org>, <robh+dt@kernel.org>, <mark.rutland@arm.com>
Cc: <pdeschrijver@nvidia.com>, <pgaikwad@nvidia.com>,
	<spujar@nvidia.com>, <josephl@nvidia.com>,
	<daniel.lezcano@linaro.org>, <mmaddireddy@nvidia.com>,
	<markz@nvidia.com>, <devicetree@vger.kernel.org>,
	<linux-clk@vger.kernel.org>, <linux-tegra@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v6 06/19] soc: tegra: Add Tegra PMC clocks registration into PMC driver
Date: Tue, 7 Jan 2020 17:13:41 -0800
Message-ID: <5b11d228-1894-e052-f740-3a050bb35b6f@nvidia.com> (raw)
In-Reply-To: <b37d1be0-affc-a0c7-157a-140b141ca155@gmail.com>


On 1/7/20 5:00 PM, Dmitry Osipenko wrote:
> 07.01.2020 07:14, Sowjanya Komatineni пишет:
>> Tegra PMC has clk_out_1, clk_out_2, and clk_out_3 clocks and currently
>> these PMC clocks are registered by Tegra clock driver with each clock as
>> separate mux and gate clocks using clk_register_mux and clk_register_gate
>> by passing PMC base address and register offsets and PMC programming for
>> these clocks happens through direct PMC access by the clock driver.
>>
>> With this, when PMC is in secure mode any direct PMC access from the
>> non-secure world does not go through and these clocks will not be
>> functional.
>>
>> This patch adds these PMC clocks registration to pmc driver with PMC as
>> a clock provider and registers each clock as single clock.
>>
>> clk_ops callback implementations for these clocks uses tegra_pmc_readl and
>> tegra_pmc_writel which supports PMC programming in both secure mode and
>> non-secure mode.
>>
>> Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
>> ---
>>   drivers/soc/tegra/pmc.c | 242 ++++++++++++++++++++++++++++++++++++++++++++++++
>>   1 file changed, 242 insertions(+)
>>
>> diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
>> index 1699dda6b393..2b1a709c3cb7 100644
>> --- a/drivers/soc/tegra/pmc.c
>> +++ b/drivers/soc/tegra/pmc.c
>> @@ -13,9 +13,13 @@
>>   
>>   #include <linux/arm-smccc.h>
>>   #include <linux/clk.h>
>> +#include <linux/clk-provider.h>
>> +#include <linux/clkdev.h>
>> +#include <linux/clk/clk-conf.h>
>>   #include <linux/clk/tegra.h>
>>   #include <linux/debugfs.h>
>>   #include <linux/delay.h>
>> +#include <linux/device.h>
>>   #include <linux/err.h>
>>   #include <linux/export.h>
>>   #include <linux/init.h>
>> @@ -48,6 +52,7 @@
>>   #include <dt-bindings/pinctrl/pinctrl-tegra-io-pad.h>
>>   #include <dt-bindings/gpio/tegra186-gpio.h>
>>   #include <dt-bindings/gpio/tegra194-gpio.h>
>> +#include <dt-bindings/soc/tegra-pmc.h>
>>   
>>   #define PMC_CNTRL			0x0
>>   #define  PMC_CNTRL_INTR_POLARITY	BIT(17) /* inverts INTR polarity */
>> @@ -100,6 +105,8 @@
>>   #define PMC_WAKE2_STATUS		0x168
>>   #define PMC_SW_WAKE2_STATUS		0x16c
>>   
>> +#define PMC_CLK_OUT_CNTRL		0x1a8
>> +#define  PMC_CLK_OUT_MUX_MASK		GENMASK(1, 0)
>>   #define PMC_SENSOR_CTRL			0x1b0
>>   #define  PMC_SENSOR_CTRL_SCRATCH_WRITE	BIT(2)
>>   #define  PMC_SENSOR_CTRL_ENABLE_RST	BIT(1)
>> @@ -155,6 +162,63 @@
>>   #define  TEGRA_SMC_PMC_READ	0xaa
>>   #define  TEGRA_SMC_PMC_WRITE	0xbb
>>   
>> +struct pmc_clk {
>> +	struct clk_hw	hw;
>> +	unsigned long	offs;
>> +	u32		mux_shift;
>> +	u32		force_en_shift;
>> +};
>> +
>> +#define to_pmc_clk(_hw) container_of(_hw, struct pmc_clk, hw)
>> +
>> +struct pmc_clk_init_data {
>> +	char *name;
>> +	const char *const *parents;
>> +	int num_parents;
>> +	int clk_id;
>> +	u8 mux_shift;
>> +	u8 force_en_shift;
>> +};
>> +
>> +static const char * const clk_out1_parents[] = { "osc", "osc_div2",
>> +	"osc_div4", "extern1",
>> +};
>> +
>> +static const char * const clk_out2_parents[] = { "osc", "osc_div2",
>> +	"osc_div4", "extern2",
>> +};
>> +
>> +static const char * const clk_out3_parents[] = { "osc", "osc_div2",
>> +	"osc_div4", "extern3",
>> +};
> There is no way to specify "osc" as a parent clock in a device-tree
> because there is no DT ID assigned to the OSC in the CaR driver, should
> this be fixed?
Yes, we need DT ID for OSC. Will add.

  reply index

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-07  4:13 [PATCH v6 00/19] Move PMC clocks into Tegra " Sowjanya Komatineni
2020-01-07  4:14 ` [PATCH v6 01/19] dt-bindings: clock: tegra: Change CLK_M_DIV to OSC_DIV clocks Sowjanya Komatineni
2020-01-07  4:14 ` [PATCH v6 02/19] clk: tegra: Change CLK_M_DIV clocks " Sowjanya Komatineni
2020-01-07  4:14 ` [PATCH v6 03/19] clk: tegra: Fix Tegra PMC clock out parents Sowjanya Komatineni
2020-01-07  4:14 ` [PATCH v6 04/19] dt-bindings: tegra: Convert Tegra PMC bindings to YAML Sowjanya Komatineni
2020-01-07  4:14 ` [PATCH v6 05/19] dt-bindings: soc: tegra-pmc: Add Tegra PMC clock bindings Sowjanya Komatineni
2020-01-07  4:14 ` [PATCH v6 06/19] soc: tegra: Add Tegra PMC clocks registration into PMC driver Sowjanya Komatineni
2020-01-08  1:00   ` Dmitry Osipenko
2020-01-08  1:13     ` Sowjanya Komatineni [this message]
2020-01-07  4:14 ` [PATCH v6 07/19] dt-bindings: soc: tegra-pmc: Add id for Tegra PMC 32KHz blink clock Sowjanya Komatineni
2020-01-07  4:14 ` [PATCH v6 08/19] soc: tegra: Add support for " Sowjanya Komatineni
2020-01-07  4:14 ` [PATCH v6 09/19] clk: tegra: Remove tegra_pmc_clk_init along with clk ids Sowjanya Komatineni
2020-01-07  4:14 ` [PATCH v6 10/19] dt-bindings: clock: tegra: Remove pmc clock ids from clock dt-bindings Sowjanya Komatineni
2020-01-07  4:14 ` [PATCH v6 11/19] ASoC: tegra: Use device managed resource APIs to get the clock Sowjanya Komatineni
2020-01-07  4:14 ` [PATCH v6 12/19] ASoC: tegra: Add audio mclk configuration Sowjanya Komatineni
2020-01-07 11:14   ` Sameer Pujar
2020-01-07 16:56     ` Sowjanya Komatineni
2020-01-07 22:56       ` Dmitry Osipenko
2020-01-07 23:23         ` Sowjanya Komatineni
2020-01-07  4:14 ` [PATCH v6 13/19] ASoC: tegra: Add fallback implementation for audio mclk Sowjanya Komatineni
2020-01-07  4:14 ` [PATCH v6 14/19] clk: tegra: Remove audio related clock enables from init_table Sowjanya Komatineni
2020-01-07  4:14 ` [PATCH v6 15/19] ARM: dts: tegra: Add clock-cells property to pmc Sowjanya Komatineni
2020-01-07  4:14 ` [PATCH v6 16/19] arm64: tegra: Add clock-cells property to Tegra PMC node Sowjanya Komatineni
2020-01-07  4:14 ` [PATCH v6 17/19] ARM: tegra: Update sound node clocks in device tree Sowjanya Komatineni
2020-01-07  4:14 ` [PATCH v6 18/19] arm64: tegra: smaug: Change clk_out_2 provider to pmc Sowjanya Komatineni
2020-01-07  4:14 ` [PATCH v6 19/19] ASoC: nau8825: change Tegra clk_out_2 provider to tegra_pmc Sowjanya Komatineni
2020-01-07 12:21 ` [PATCH v6 00/19] Move PMC clocks into Tegra PMC driver Thierry Reding
2020-01-07 16:50   ` Sowjanya Komatineni
2020-01-08  0:40     ` Dmitry Osipenko
2020-01-07 23:01 ` Dmitry Osipenko
2020-01-07 23:24   ` Sowjanya Komatineni
2020-01-07 23:28     ` Dmitry Osipenko
2020-01-08  0:02       ` Sowjanya Komatineni
2020-01-08  1:01         ` Dmitry Osipenko

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