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    Subject[PATCH v2 11/16] clk: qcom: krait-cc: force sec_mux to QSB
    Date
    Now that we have converted every driver to parent_data, it was
    notice that the bootloader can't really leave the system in a
    strange state where l2 or the cpu0/1 can be sourced in a number of ways
    for example cpu1 sourcing out of qsb, l2 sourcing out of pxo.
    To correctly reset the mux and the HFPLL force the sec_mux to QSB.

    Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
    ---
    drivers/clk/qcom/krait-cc.c | 13 +++++++++++--
    1 file changed, 11 insertions(+), 2 deletions(-)

    diff --git a/drivers/clk/qcom/krait-cc.c b/drivers/clk/qcom/krait-cc.c
    index 5f98ee1c3681..299eb4c81d96 100644
    --- a/drivers/clk/qcom/krait-cc.c
    +++ b/drivers/clk/qcom/krait-cc.c
    @@ -15,6 +15,8 @@

    #include "clk-krait.h"

    +#define QSB_RATE 1
    +
    static unsigned int sec_mux_map[] = {
    2,
    0,
    @@ -181,6 +183,13 @@ krait_add_sec_mux(struct device *dev, struct clk *qsb, int id,
    if (ret)
    clk = ERR_PTR(ret);

    + /*
    + * Force the sec_mux to be set to QSB rate.
    + * This is needed to correctly set the parents and
    + * to later reset mux and HFPLL to a known freq.
    + */
    + clk_set_rate(clk, QSB_RATE);
    +
    err_clk:
    if (unique_aux)
    kfree(parent_name);
    @@ -378,7 +387,7 @@ static int krait_cc_probe(struct platform_device *pdev)
    */
    cur_rate = clk_get_rate(l2_pri_mux_clk);
    aux_rate = 384000000;
    - if (cur_rate == 1) {
    + if (cur_rate == QSB_RATE) {
    dev_info(dev, "L2 @ QSB rate. Forcing new rate.\n");
    cur_rate = aux_rate;
    }
    @@ -389,7 +398,7 @@ static int krait_cc_probe(struct platform_device *pdev)
    for_each_possible_cpu(cpu) {
    clk = clks[cpu];
    cur_rate = clk_get_rate(clk);
    - if (cur_rate == 1) {
    + if (cur_rate == QSB_RATE) {
    dev_info(dev, "CPU%d @ QSB rate. Forcing new rate.\n", cpu);
    cur_rate = aux_rate;
    }
    --
    2.34.1
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