kernel/drivers/clocksource/timer-imx-tpm.c, branch linux-6.9.y

clocksource/drivers/imx-tpm: Move tpm_read_sched_clock() under CONFIG_ARM

2022-03-07T17:27:22Z

When building this driver for an architecture other than ARCH=arm: drivers/clocksource/timer-imx-tpm.c:78:20: error: unused function 'tpm_read_sched_clock' [-Werror,-Wunused-function] static u64 notrace tpm_read_sched_clock(void) ^ 1 error generated. Move the function definition under the existing CONFIG_ARM section so there is no more warning. Fixes: 10720e120e2b ("clocksource/drivers/imx-tpm: Exclude sched clock for ARM64") Signed-off-by: Nathan Chancellor Reviewed-by: Peng Fan Link: https://lore.kernel.org/r/20220303184212.2356245-1-nathan@kernel.org Signed-off-by: Daniel Lezcano

clocksource/drivers/imx-tpm: Exclude sched clock for ARM64

2022-02-16T13:43:30Z

For ARM64 platform such as i.MX8ULP which has ARMv8 generic timer as sched clock, which is much faster compared with tpm sched clock. Reading the tpm count register in i.MX8ULP requires about 290ns, this is slow and introduce scheduler latency. So exclude tpm sched clock for ARM64 platform. Signed-off-by: Peng Fan Link: https://lore.kernel.org/r/20220105124304.3567629-1-peng.fan@oss.nxp.com Signed-off-by: Daniel Lezcano

clocksource/drivers/imx-tpm: Update name of clkevt

2022-01-26T09:01:05Z

The tpm driver is not only for i.MX7ULP now, i.MX8ULP also use it. It maybe also used by other i.MX variants, so update name to reflect it. Signed-off-by: Peng Fan Link: https://lore.kernel.org/r/20211214120737.1611955-6-peng.fan@oss.nxp.com Signed-off-by: Daniel Lezcano

clocksource/drivers/imx-tpm: Add CLOCK_EVT_FEAT_DYNIRQ

2022-01-26T09:01:00Z

Add CLOCK_EVT_FEAT_DYNIRQ to allow the IRQ could be runtime set affinity to the cores that needs wake up, otherwise saying core0 has to send IPI to wakeup core1. With CLOCK_EVT_FEAT_DYNIRQ set, when broadcast timer could wake up the cores, IPI is not needed. Acked-by: Jacky Bai Signed-off-by: Peng Fan Link: https://lore.kernel.org/r/20211214120737.1611955-5-peng.fan@oss.nxp.com Signed-off-by: Daniel Lezcano

clocksource/drivers/imx-tpm: Mark two variable with __ro_after_init

2022-01-26T09:00:50Z

counter_width and timer_base will not be updated after init, so mark as __ro_after_init. Signed-off-by: Peng Fan Link: https://lore.kernel.org/r/20211214120737.1611955-4-peng.fan@oss.nxp.com Signed-off-by: Daniel Lezcano

clocksource/drivers/imx-tpm: Drop IRQF_IRQPOLL

2022-01-26T09:00:45Z

Per the Documentation, IRQF_IRQPOLL is used for polling (only the interrupt that is registered first in a shared interrupt is considered for performance reasons) The TPM timer is not sharing interrupt with others, and pass irqpoll not make sense for i.MX platform. Signed-off-by: Peng Fan Link: https://lore.kernel.org/r/20211214120737.1611955-3-peng.fan@oss.nxp.com Signed-off-by: Daniel Lezcano

clocksource/drivers/imx-tpm: Add support for ARM64

2020-04-09T14:24:50Z

Allows building and compile-testing the i.MX TPM driver also for ARM64. The delay_timer is only supported on ARMv7. Signed-off-by: Anson Huang Signed-off-by: Daniel Lezcano Link: https://lore.kernel.org/r/1585715222-24489-1-git-send-email-Anson.Huang@nxp.com

clocksource/drivers/imx-tpm: Remove unused includes

2020-03-17T09:10:50Z

There is nothing in use from of_address.h/of_irq.h, remove them. Signed-off-by: Anson Huang Signed-off-by: Daniel Lezcano Link: https://lore.kernel.org/r/1584412549-18354-1-git-send-email-Anson.Huang@nxp.com

clocksource/drivers/timer-imx-tpm: Specify clock name for timer-of

2018-12-18T21:22:23Z

i.MX TPM needs "ipg" clock for register access and "per" clock for timer function, the driver gets "ipg" clock by searching the clock name, but timer-of initialization will get first clock in device tree TPM node since no clock name specified in of_clk, that means the "per" clock MUST be the first clock entry in device tree TPM node, this patch specifies clock name for of_clk to avoid this restriction, it makes TPM driver work properly with different sequence of clock entries in device tree TPM node. Signed-off-by: Anson Huang Signed-off-by: Daniel Lezcano

clocksource/drivers/timer-imx-tpm: Convert the driver to timer-of

2018-12-18T21:22:23Z

Convert the driver to use the timer_of helpers. This allows to handle timer base, clock and irq using common timer_of driver and it simplifies the code. Signed-off-by: Anson Huang Signed-off-by: Daniel Lezcano