1 // SPDX-License-Identifier: GPL-2.0-only
7 #include <linux/clk-provider.h>
13 #include "clk-iproc.h"
71 	val = readl(pll->base + IPROC_CLK_ARM_DIV_OFFSET);  in __get_fid()
80 	val = readl(pll->base + IPROC_CLK_POLICY_FREQ_OFFSET);  in __get_fid()
84 	val = readl(pll->base + IPROC_CLK_POLICY_DBG_OFFSET);  in __get_fid()
88 		pr_debug("%s: fid override %u->%u\n", __func__,	fid,  in __get_fid()
99  * Determine the mdiv (post divider) based on the frequency ID being used.
101  *    - 25 MHz Crystal
102  *    - System clock
103  *    - PLL channel 0 (slow clock)
104  *    - PLL channel 1 (fast clock)
121 		val = readl(pll->base + IPROC_CLK_PLLARMC_OFFSET);  in __get_mdiv()
128 		val = readl(pll->base +	IPROC_CLK_PLLARMCTL5_OFFSET);  in __get_mdiv()
135 		mdiv = -EFAULT;  in __get_mdiv()
146 	val = readl(pll->base + IPROC_CLK_PLLARM_OFFSET_OFFSET);  in __get_ndiv()
149 		 * offset mode is active. Read the ndiv from the PLLARM OFFSET  in __get_ndiv()
159 		/* offset mode not active */  in __get_ndiv()
160 		val = readl(pll->base + IPROC_CLK_PLLARMA_OFFSET);  in __get_ndiv()
166 		val = readl(pll->base + IPROC_CLK_PLLARMB_OFFSET);  in __get_ndiv()
177  * divider values:
178  *   pdiv = ARM PLL pre-divider
180  *   mdiv = ARM PLL post divider
195 	val = readl(pll->base + IPROC_CLK_PLLARMC_OFFSET);  in iproc_arm_pll_recalc_rate()
197 		pll->rate = parent_rate;  in iproc_arm_pll_recalc_rate()
198 		return pll->rate;  in iproc_arm_pll_recalc_rate()
202 	val = readl(pll->base + IPROC_CLK_PLLARMA_OFFSET);  in iproc_arm_pll_recalc_rate()
204 		pll->rate = 0;  in iproc_arm_pll_recalc_rate()
216 		pll->rate = 0;  in iproc_arm_pll_recalc_rate()
219 	pll->rate = (ndiv * parent_rate) >> 20;  in iproc_arm_pll_recalc_rate()
220 	pll->rate = (pll->rate / pdiv) / mdiv;  in iproc_arm_pll_recalc_rate()
223 		 pll->rate, parent_rate);  in iproc_arm_pll_recalc_rate()
227 	return pll->rate;  in iproc_arm_pll_recalc_rate()
245 	pll->base = of_iomap(node, 0);  in iproc_armpll_setup()
246 	if (WARN_ON(!pll->base))  in iproc_armpll_setup()
249 	init.name = node->name;  in iproc_armpll_setup()
255 	pll->hw.init = &init;  in iproc_armpll_setup()
257 	ret = clk_hw_register(NULL, &pll->hw);  in iproc_armpll_setup()
261 	ret = of_clk_add_hw_provider(node, of_clk_hw_simple_get, &pll->hw);  in iproc_armpll_setup()
268 	clk_hw_unregister(&pll->hw);  in iproc_armpll_setup()
270 	iounmap(pll->base);  in iproc_armpll_setup()