From: Boris Brezillon Date: Thu, 22 Mar 2018 09:11:30 +0000 (+0100) Subject: clk: bcm2835: De-assert/assert PLL reset signal when appropriate X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ff18ffb1f81db091e916bb3afc4a264219f840ea;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git clk: bcm2835: De-assert/assert PLL reset signal when appropriate commit 753872373b599384ac7df809aa61ea12d1c4d5d1 upstream. In order to enable a PLL, not only the PLL has to be powered up and locked, but you also have to de-assert the reset signal. The last part was missing. Add it so PLLs that were not enabled by the FW/bootloader can be enabled from Linux. Fixes: 41691b8862e2 ("clk: bcm2835: Add support for programming the audio domain clocks") Cc: Signed-off-by: Boris Brezillon Reviewed-by: Eric Anholt Signed-off-by: Stephen Boyd Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/clk/bcm/clk-bcm2835.c b/drivers/clk/bcm/clk-bcm2835.c index eec52734d6ac..5f8082d89131 100644 --- a/drivers/clk/bcm/clk-bcm2835.c +++ b/drivers/clk/bcm/clk-bcm2835.c @@ -632,9 +632,7 @@ static void bcm2835_pll_off(struct clk_hw *hw) const struct bcm2835_pll_data *data = pll->data; spin_lock(&cprman->regs_lock); - cprman_write(cprman, data->cm_ctrl_reg, - cprman_read(cprman, data->cm_ctrl_reg) | - CM_PLL_ANARST); + cprman_write(cprman, data->cm_ctrl_reg, CM_PLL_ANARST); cprman_write(cprman, data->a2w_ctrl_reg, cprman_read(cprman, data->a2w_ctrl_reg) | A2W_PLL_CTRL_PWRDN); @@ -670,6 +668,10 @@ static int bcm2835_pll_on(struct clk_hw *hw) cpu_relax(); } + cprman_write(cprman, data->a2w_ctrl_reg, + cprman_read(cprman, data->a2w_ctrl_reg) | + A2W_PLL_CTRL_PRST_DISABLE); + return 0; }