clk-raspberrypi.c (35f73cca1cecda0c1f8bb7d8be4ce5cd2d46ae8c) clk-raspberrypi.c (bc163555603e4ae9c817675ad80d618a4cdbfa2d)
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Raspberry Pi driver for firmware controlled clocks
4 *
5 * Even though clk-bcm2835 provides an interface to the hardware registers for
6 * the system clocks we've had to factor out 'pllb' as the firmware 'owns' it.
7 * We're not allowed to change it directly as we might race with the
8 * over-temperature and under-voltage protections provided by the firmware.

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339};
340
341static int raspberrypi_discover_clocks(struct raspberrypi_clk *rpi,
342 struct clk_hw_onecell_data *data)
343{
344 struct rpi_firmware_get_clocks_response *clks;
345 int ret;
346
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Raspberry Pi driver for firmware controlled clocks
4 *
5 * Even though clk-bcm2835 provides an interface to the hardware registers for
6 * the system clocks we've had to factor out 'pllb' as the firmware 'owns' it.
7 * We're not allowed to change it directly as we might race with the
8 * over-temperature and under-voltage protections provided by the firmware.

--- 330 unchanged lines hidden (view full) ---

339};
340
341static int raspberrypi_discover_clocks(struct raspberrypi_clk *rpi,
342 struct clk_hw_onecell_data *data)
343{
344 struct rpi_firmware_get_clocks_response *clks;
345 int ret;
346
347 /*
348 * The firmware doesn't guarantee that the last element of
349 * RPI_FIRMWARE_GET_CLOCKS is zeroed. So allocate an additional
350 * zero element as sentinel.
351 */
347 clks = devm_kcalloc(rpi->dev,
352 clks = devm_kcalloc(rpi->dev,
348 RPI_FIRMWARE_NUM_CLK_ID, sizeof(*clks),
353 RPI_FIRMWARE_NUM_CLK_ID + 1, sizeof(*clks),
349 GFP_KERNEL);
350 if (!clks)
351 return -ENOMEM;
352
353 ret = rpi_firmware_property(rpi->firmware, RPI_FIRMWARE_GET_CLOCKS,
354 clks,
355 sizeof(*clks) * RPI_FIRMWARE_NUM_CLK_ID);
356 if (ret)

--- 116 unchanged lines hidden --- 		354 GFP_KERNEL);
355 if (!clks)
356 return -ENOMEM;
357
358 ret = rpi_firmware_property(rpi->firmware, RPI_FIRMWARE_GET_CLOCKS,
359 clks,
360 sizeof(*clks) * RPI_FIRMWARE_NUM_CLK_ID);
361 if (ret)

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