Lines Matching refs:apb
71 static inline unsigned long bt1_apb_n_to_timeout_us(struct bt1_apb *apb, u32 n)
75 do_div(timeout, apb->rate);
81 static inline unsigned long bt1_apb_timeout_to_n_us(struct bt1_apb *apb,
84 u64 n = (u64)timeout * apb->rate;
94 struct bt1_apb *apb = data;
97 regmap_read(apb->regs, APB_EHB_ADDR, &addr);
99 dev_crit_ratelimited(apb->dev,
101 atomic_inc_return(&apb->count),
113 regmap_update_bits(apb->regs, APB_EHB_ISR, APB_EHB_ISR_PENDING, 0);
120 struct bt1_apb *apb = data;
121 struct platform_device *pdev = to_platform_device(apb->dev);
129 struct bt1_apb *apb;
132 apb = devm_kzalloc(dev, sizeof(*apb), GFP_KERNEL);
133 if (!apb)
136 ret = devm_add_action(dev, bt1_apb_clear_data, apb);
142 apb->dev = dev;
143 atomic_set(&apb->count, 0);
144 platform_set_drvdata(pdev, apb);
146 return apb;
149 static int bt1_apb_request_regs(struct bt1_apb *apb)
151 struct platform_device *pdev = to_platform_device(apb->dev);
156 dev_err(apb->dev, "Couldn't map APB EHB registers\n");
160 apb->regs = devm_regmap_init_mmio(apb->dev, regs, &bt1_apb_regmap_cfg);
161 if (IS_ERR(apb->regs)) {
162 dev_err(apb->dev, "Couldn't create APB EHB regmap\n");
163 return PTR_ERR(apb->regs);
166 apb->res = devm_platform_ioremap_resource_byname(pdev, "nodev");
167 if (IS_ERR(apb->res))
168 dev_err(apb->dev, "Couldn't map reserved region\n");
170 return PTR_ERR_OR_ZERO(apb->res);
173 static int bt1_apb_request_rst(struct bt1_apb *apb)
177 apb->prst = devm_reset_control_get_optional_exclusive(apb->dev, "prst");
178 if (IS_ERR(apb->prst))
179 return dev_err_probe(apb->dev, PTR_ERR(apb->prst),
182 ret = reset_control_deassert(apb->prst);
184 dev_err(apb->dev, "Failed to deassert the reset line\n");
191 struct bt1_apb *apb = data;
193 clk_disable_unprepare(apb->pclk);
196 static int bt1_apb_request_clk(struct bt1_apb *apb)
200 apb->pclk = devm_clk_get(apb->dev, "pclk");
201 if (IS_ERR(apb->pclk))
202 return dev_err_probe(apb->dev, PTR_ERR(apb->pclk),
205 ret = clk_prepare_enable(apb->pclk);
207 dev_err(apb->dev, "Couldn't enable the APB clock\n");
211 ret = devm_add_action_or_reset(apb->dev, bt1_apb_disable_clk, apb);
213 dev_err(apb->dev, "Can't add APB EHB clocks disable action\n");
217 apb->rate = clk_get_rate(apb->pclk);
218 if (!apb->rate) {
219 dev_err(apb->dev, "Invalid clock rate\n");
228 struct bt1_apb *apb = data;
230 regmap_update_bits(apb->regs, APB_EHB_ISR, APB_EHB_ISR_MASK, 0);
233 static int bt1_apb_request_irq(struct bt1_apb *apb)
235 struct platform_device *pdev = to_platform_device(apb->dev);
238 apb->irq = platform_get_irq(pdev, 0);
239 if (apb->irq < 0)
240 return apb->irq;
242 ret = devm_request_irq(apb->dev, apb->irq, bt1_apb_isr, IRQF_SHARED,
243 "bt1-apb", apb);
245 dev_err(apb->dev, "Couldn't request APB EHB IRQ\n");
249 ret = devm_add_action(apb->dev, bt1_apb_clear_irq, apb);
251 dev_err(apb->dev, "Can't add APB EHB IRQs clear action\n");
256 regmap_update_bits(apb->regs, APB_EHB_ISR,
266 struct bt1_apb *apb = dev_get_drvdata(dev);
268 return scnprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&apb->count));
275 struct bt1_apb *apb = dev_get_drvdata(dev);
280 ret = regmap_read(apb->regs, APB_EHB_TIMEOUT, &n);
284 timeout = bt1_apb_n_to_timeout_us(apb, n);
293 struct bt1_apb *apb = dev_get_drvdata(dev);
301 n = bt1_apb_timeout_to_n_us(apb, timeout);
304 ret = regmap_write(apb->regs, APB_EHB_TIMEOUT, n);
320 struct bt1_apb *apb = dev_get_drvdata(dev);
327 readl(apb->res);
329 regmap_update_bits(apb->regs, APB_EHB_ISR, APB_EHB_ISR_PENDING,
348 struct bt1_apb *apb = data;
350 device_remove_groups(apb->dev, bt1_apb_sysfs_groups);
353 static int bt1_apb_init_sysfs(struct bt1_apb *apb)
357 ret = device_add_groups(apb->dev, bt1_apb_sysfs_groups);
359 dev_err(apb->dev, "Failed to create EHB APB sysfs nodes\n");
363 ret = devm_add_action_or_reset(apb->dev, bt1_apb_remove_sysfs, apb);
365 dev_err(apb->dev, "Can't add APB EHB sysfs remove action\n");
372 struct bt1_apb *apb;
375 apb = bt1_apb_create_data(pdev);
376 if (IS_ERR(apb))
377 return PTR_ERR(apb);
379 ret = bt1_apb_request_regs(apb);
383 ret = bt1_apb_request_rst(apb);
387 ret = bt1_apb_request_clk(apb);
391 ret = bt1_apb_request_irq(apb);
395 ret = bt1_apb_init_sysfs(apb);
403 { .compatible = "baikal,bt1-apb" },
411 .name = "bt1-apb",