kernel/drivers/clk/st/clk-flexgen.c, branch linux-6.9.y

clk: st: flexgen: Switch to determine_rate

2023-06-09T01:39:35Z

The ST Flexgen clocks implements a mux with a set_parent hook, but doesn't provide a determine_rate implementation. This is a bit odd, since set_parent() is there to, as its name implies, change the parent of a clock. However, the most likely candidate to trigger that parent change is a call to clk_set_rate(), with determine_rate() figuring out which parent is the best suited for a given rate. The other trigger would be a call to clk_set_parent(), but it's far less used, and it doesn't look like there's any obvious user for that clock. So, the set_parent hook is effectively unused, possibly because of an oversight. However, it could also be an explicit decision by the original author to avoid any reparenting but through an explicit call to clk_set_parent(). The driver does implement round_rate() though, which means that we can change the rate of the clock, but we will never get to change the parent. However, It's hard to tell whether it's been done on purpose or not. Since we'll start mandating a determine_rate() implementation, let's convert the round_rate() implementation to a determine_rate(), which will also make the current behavior explicit. And if it was an oversight, the clock behaviour can be adjusted later on. Signed-off-by: Maxime Ripard Link: https://lore.kernel.org/r/20221018-clk-range-checks-fixes-v4-62-971d5077e7d2@cerno.tech Signed-off-by: Stephen Boyd

clk: st: flexgen: embed soc clock outputs within compatible data

2021-06-28T02:53:39Z

In order to avoid relying on the old style description via the DT clock-output-names, add compatible data describing the flexgen outputs clocks for all STiH407/STiH410 and STiH418 SOCs. In order to ease transition between the two methods, this commit introduce the new compatible without removing the old method. Once DTs will be fixed, the method relying on DT clock-output-names will be removed from this driver as well as old compatibles. Signed-off-by: Alain Volmat Reviewed-by: Patrice Chotard Link: https://lore.kernel.org/r/20210331201632.24530-3-avolmat@me.com Signed-off-by: Stephen Boyd

clk: clk-flexgen: fix clock-critical handling

2020-05-27T08:14:06Z

Fixes an issue leading to having all clocks following a critical clocks marked as well as criticals. Fixes: fa6415affe20 ("clk: st: clk-flexgen: Detect critical clocks") Signed-off-by: Alain Volmat Link: https://lkml.kernel.org/r/20200322140740.3970-1-avolmat@me.com Reviewed-by: Patrice Chotard Signed-off-by: Stephen Boyd

clk: st: clk-flexgen: Add of_node_put() in st_of_flexgen_setup()

2019-08-07T22:26:32Z

In function st_of_flexgen_setup, variable pnode takes the return value of of_get_parent, which gets a node but does not put it. If pnode is not put before the function returns, it may cause a memory leak. Hence put pnode after its last occurrence. Issue found with Coccinelle. Signed-off-by: Nishka Dasgupta Link: https://lkml.kernel.org/r/20190804163151.6511-1-nishkadg.linux@gmail.com Signed-off-by: Stephen Boyd

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194

2019-05-30T18:29:22Z

Based on 1 normalized pattern(s): license terms gnu general public license gpl version 2 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 161 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Alexios Zavras Reviewed-by: Steve Winslow Reviewed-by: Richard Fontana Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528170027.447718015@linutronix.de Signed-off-by: Greg Kroah-Hartman

clk: st: Remove usage of CLK_IS_BASIC

2018-12-10T22:43:20Z

This flag doesn't look to be used by any code, just set in various clk init structures and then never tested again. Remove it from these drivers as it doesn't provide any benefit. Signed-off-by: Stephen Boyd

clk: st: clk-flexgen: Unmap region obtained by of_iomap

2016-12-09T00:35:22Z

Free memory mapping, if probe is not successful. Signed-off-by: Arvind Yadav Signed-off-by: Stephen Boyd

drivers: clk: st: Handle clk synchronous mode for video clocks

2016-09-16T23:01:41Z

This patch configures the semi-synchronous mode of the video clocks of clkgenD2. Signed-off-by: Olivier Bideau Signed-off-by: Gabriel Fernandez Acked-by: Peter Griffin Signed-off-by: Stephen Boyd

drivers: clk: st: Add clock propagation for audio clocks

2016-09-16T23:01:39Z

This patch allows fine tuning of the quads FS for audio clocks accuracy. Signed-off-by: Olivier Bideau Signed-off-by: Gabriel Fernandez Acked-by: Peter Griffin Signed-off-by: Stephen Boyd

clk: st: clk-flexgen: Detect critical clocks

2016-06-30T19:17:06Z

Utilise the new Critical Clock infrastructure to mark clocks which much not be disabled as CRITICAL. While we're at it, reduce the coverage of the flex_flags variable, since it's only really used in a single for() loop. Signed-off-by: Lee Jones Signed-off-by: Stephen Boyd