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FROM_NEQ_ENVFROM(0.00)[jbrunet@baylibre.com,linux-sunxi@lists.linux.dev]; ASN(0.00)[asn:63949, ipnet:104.64.192.0/19, country:SG]; TO_DN_SOME(0.00)[] X-Rspamd-Queue-Id: E0A141C2C12 X-MORS-Enabled: yes X-MORS-DOMAIN: patchwork.local X-MORS-HOSTING: hosting172546 X-MORS-USER: hosting172546 X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= Add support for sunxi-ng read-only dividers. This will be useful to the a733 oscillator detection logic. Reviewed-by: Chen-Yu Tsai Signed-off-by: Jerome Brunet --- drivers/clk/sunxi-ng/ccu_div.c | 30 ++++++++++++++++++++++++++++-- drivers/clk/sunxi-ng/ccu_div.h | 1 + drivers/clk/sunxi-ng/ccu_mux.c | 2 +- drivers/clk/sunxi-ng/ccu_mux.h | 4 ++++ 4 files changed, 34 insertions(+), 3 deletions(-) diff --git a/drivers/clk/sunxi-ng/ccu_div.c b/drivers/clk/sunxi-ng/ccu_div.c index 62d680ccb524..93cb4cb93abe 100644 --- a/drivers/clk/sunxi-ng/ccu_div.c +++ b/drivers/clk/sunxi-ng/ccu_div.c @@ -20,8 +20,22 @@ static int ccu_div_determine_rate_helper(struct ccu_mux_internal *mux, if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV) req->rate *= cd->fixed_post_div; - ret = divider_determine_rate(&cd->common.hw, req, cd->div.table, - cd->div.width, cd->div.flags); + if (cd->div.flags & CLK_DIVIDER_READ_ONLY) { + unsigned long val; + u32 reg; + + reg = readl(cd->common.base + cd->common.reg); + val = reg >> cd->div.shift; + val &= (1 << cd->div.width) - 1; + + ret = divider_ro_determine_rate(&cd->common.hw, req, cd->div.table, + cd->div.width, cd->div.flags, val); + + } else { + ret = divider_determine_rate(&cd->common.hw, req, cd->div.table, + cd->div.width, cd->div.flags); + } + if (ret) return ret; @@ -143,3 +157,15 @@ const struct clk_ops ccu_div_ops = { .set_rate = ccu_div_set_rate, }; EXPORT_SYMBOL_NS_GPL(ccu_div_ops, "SUNXI_CCU"); + +const struct clk_ops ccu_rodiv_ops = { + .disable = ccu_div_disable, + .enable = ccu_div_enable, + .is_enabled = ccu_div_is_enabled, + + .get_parent = ccu_div_get_parent, + + .determine_rate = ccu_div_determine_rate, + .recalc_rate = ccu_div_recalc_rate, +}; +EXPORT_SYMBOL_NS_GPL(ccu_rodiv_ops, "SUNXI_CCU"); diff --git a/drivers/clk/sunxi-ng/ccu_div.h b/drivers/clk/sunxi-ng/ccu_div.h index be00b3277e97..a30a92780a05 100644 --- a/drivers/clk/sunxi-ng/ccu_div.h +++ b/drivers/clk/sunxi-ng/ccu_div.h @@ -300,5 +300,6 @@ static inline struct ccu_div *hw_to_ccu_div(struct clk_hw *hw) } extern const struct clk_ops ccu_div_ops; +extern const struct clk_ops ccu_rodiv_ops; #endif /* _CCU_DIV_H_ */ diff --git a/drivers/clk/sunxi-ng/ccu_mux.c b/drivers/clk/sunxi-ng/ccu_mux.c index 75ec3457324c..905570375711 100644 --- a/drivers/clk/sunxi-ng/ccu_mux.c +++ b/drivers/clk/sunxi-ng/ccu_mux.c @@ -67,7 +67,7 @@ unsigned long ccu_mux_helper_apply_prediv(struct ccu_common *common, return parent_rate / ccu_mux_get_prediv(common, cm, parent_index); } -static unsigned long ccu_mux_helper_unapply_prediv(struct ccu_common *common, +unsigned long ccu_mux_helper_unapply_prediv(struct ccu_common *common, struct ccu_mux_internal *cm, int parent_index, unsigned long parent_rate) diff --git a/drivers/clk/sunxi-ng/ccu_mux.h b/drivers/clk/sunxi-ng/ccu_mux.h index c94a4bde5d01..272a2c36a8f2 100644 --- a/drivers/clk/sunxi-ng/ccu_mux.h +++ b/drivers/clk/sunxi-ng/ccu_mux.h @@ -134,6 +134,10 @@ unsigned long ccu_mux_helper_apply_prediv(struct ccu_common *common, struct ccu_mux_internal *cm, int parent_index, unsigned long parent_rate); +unsigned long ccu_mux_helper_unapply_prediv(struct ccu_common *common, + struct ccu_mux_internal *cm, + int parent_index, + unsigned long parent_rate); int ccu_mux_helper_determine_rate(struct ccu_common *common, struct ccu_mux_internal *cm, struct clk_rate_request *req,