diff options
Diffstat (limited to 'target/linux/at91/patches-5.15/245-clk-at91-sama7g5-remove-prescaler-part-of-master-clo.patch')
| -rw-r--r-- | target/linux/at91/patches-5.15/245-clk-at91-sama7g5-remove-prescaler-part-of-master-clo.patch | 45 |
1 files changed, 0 insertions, 45 deletions
diff --git a/target/linux/at91/patches-5.15/245-clk-at91-sama7g5-remove-prescaler-part-of-master-clo.patch b/target/linux/at91/patches-5.15/245-clk-at91-sama7g5-remove-prescaler-part-of-master-clo.patch deleted file mode 100644 index 1ae5076da9..0000000000 --- a/target/linux/at91/patches-5.15/245-clk-at91-sama7g5-remove-prescaler-part-of-master-clo.patch +++ /dev/null @@ -1,45 +0,0 @@ -From 91a49481af7332853c4c921d46aded8210572210 Mon Sep 17 00:00:00 2001 -From: Claudiu Beznea <claudiu.beznea@microchip.com> -Date: Mon, 11 Oct 2021 14:27:17 +0300 -Subject: [PATCH 245/247] clk: at91: sama7g5: remove prescaler part of master - clock - -On SAMA7G5 the prescaler part of master clock has been implemented as a -changeable one. Everytime the prescaler is changed the PMC_SR.MCKRDY bit -must be polled. Value 1 for PMC_SR.MCKRDY means the prescaler update is -done. Driver polls for this bit until it becomes 1. On SAMA7G5 it has -been discovered that in some conditions the PMC_SR.MCKRDY is not rising -but the rate it provides it's stable. The workaround is to add a timeout -when polling for PMC_SR.MCKRDY. At the moment, for SAMA7G5, the prescaler -will be removed from Linux clock tree as all the frequencies for CPU could -be obtained from PLL and also there will be less overhead when changing -frequency via DVFS. - -Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> -Link: https://lore.kernel.org/r/20211011112719.3951784-14-claudiu.beznea@microchip.com -Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> -Signed-off-by: Stephen Boyd <sboyd@kernel.org> ---- - drivers/clk/at91/sama7g5.c | 11 +---------- - 1 file changed, 1 insertion(+), 10 deletions(-) - ---- a/drivers/clk/at91/sama7g5.c -+++ b/drivers/clk/at91/sama7g5.c -@@ -992,16 +992,7 @@ static void __init sama7g5_pmc_setup(str - } - - parent_names[0] = "cpupll_divpmcck"; -- hw = at91_clk_register_master_pres(regmap, "cpuck", 1, parent_names, -- &mck0_layout, &mck0_characteristics, -- &pmc_mck0_lock, -- CLK_SET_RATE_PARENT, 0); -- if (IS_ERR(hw)) -- goto err_free; -- -- sama7g5_pmc->chws[PMC_CPU] = hw; -- -- hw = at91_clk_register_master_div(regmap, "mck0", "cpuck", -+ hw = at91_clk_register_master_div(regmap, "mck0", "cpupll_divpmcck", - &mck0_layout, &mck0_characteristics, - &pmc_mck0_lock, CLK_GET_RATE_NOCACHE, 5); - if (IS_ERR(hw)) |